Pulverized coal sampling device

Abstract

The utility model belongs to the technical field of metallurgy, and particularly discloses a pulverized coal sampling device which comprises a pulverized coal collector, the pulverized coal collector is provided with an input end, an exhaust end and a collecting pipe, the exhaust end is connected with negative pressure power, and a negative pressure environment is formed in the internal space of the pulverized coal collector; the sampling assembly is arranged on the powder collector and comprises a sampling pipe and a negative pressure pipe, the sampling pipe is communicated with the collecting pipe, one end of the negative pressure pipe is communicated with the inner space of the powder collector, and the other end of the negative pressure pipe is communicated with the sampling pipe; and the pulverized coal bunker is connected with the output end of the collecting pipe, and a gas locking mechanism is arranged between the pulverized coal bunker and the output end of the collecting pipe and used for preventing gas in the pulverized coal bunker from entering the collecting pipe. The pulverized coal sampling device has the beneficial effect that the pulverized coal sampling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgy, in particular to a coal powder sampling device. Background Art

[0002] At present, the main method of sampling coal powder in the coal powder preparation system of most steel enterprises is: a separate sampling pipeline is set on the coal powder falling pipeline (the angle between the sampling pipeline and the powder falling pipeline is about 45°), and a manual valve is set on the sampling pipeline. When sampling, the manual valve is opened, and the coal powder flows out from the powder falling pipeline through the sampling pipeline, and then the sample is manually collected by aligning the container with the sampling port. Finally, the sample is divided into a sampling box. Although this sampling method is simple and requires less investment, since the powder falling pipeline is connected to the coal powder bin, the coal powder bin is in positive pressure operation for a long time (the injection tank needs to release pressure into the coal powder bin). When the positive pressure in the coal powder bin is high, a positive pressure will be applied to the powder falling pipeline. The coal powder in the powder falling pipeline is subjected to this positive pressure, resulting in an increase in resistance in the powder falling pipeline, which in turn leads to poor coal powder falling and reduced sampling efficiency. At the same time, the sampling efficiency of the coal powder falling randomly into the sampling tube during the falling process by gravity is low. In view of this, the applicant has proposed a coal powder sampling device. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a coal powder sampling device to solve the problem of low efficiency of coal powder sampling in the prior art.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a coal powder sampling device, comprising:

[0005] A powder collector, wherein the powder collector is provided with an input end, an exhaust end and a collecting pipe, wherein the exhaust end is connected to a negative pressure power, and the internal space of the powder collector forms a negative pressure environment;

[0006] A sampling assembly is arranged on the powder collector, the sampling assembly comprises a sampling tube and a negative pressure tube, the sampling tube is connected to the collecting tube, one end of the negative pressure tube is connected to the internal space of the powder collector, and the other end of the negative pressure tube is connected to the sampling tube;

[0007] A pulverized coal bin is connected to the output end of the collecting pipe. An air locking mechanism is provided between the pulverized coal bin and the output end of the collecting pipe to isolate the gas in the pulverized coal bin from entering the collecting pipe.

[0008] Optionally, the sampling tube is provided with a first sampling valve and a second sampling valve, the connection point between the negative pressure tube and the sampling tube is located between the first sampling valve and the second sampling valve, and the negative pressure tube is provided with a negative pressure valve.

[0009] Optionally, a filter screen is provided at the connection between the negative pressure tube and the sampling tube, and the free end of the sampling tube is detachably connected to a sample tank.

[0010] Optionally, a cleaning assembly is also included, which includes a cleaning pipe arranged on the sampling tube and connected to the sampling tube, and a cleaning valve arranged on the cleaning pipe, wherein the connection between the cleaning pipe and the sampling tube is located between the collecting tube and the first sampling valve, wherein the free end of the cleaning pipe is used for introducing an inert gas.

[0011] Optionally, a powder discharge valve is provided at the inlet end of the collecting pipe.

[0012] Optionally, the air locking mechanism includes a feed end and a discharge end, the feed end is connected to the collecting pipe, and the discharge end is connected to the pulverized coal bin.

[0013] Optionally, the air locking mechanism further includes a first unloading sealing structure and a second unloading sealing structure arranged between the feed end and the discharge end, and a coal powder buffer zone is provided between the first unloading sealing structure and the second unloading sealing structure.

[0014] Optionally, the first unloading sealing structure includes a first unloading plate hinged at the feed end, a first adjusting rod is fixedly connected to the first unloading plate, and the first adjusting rod passes through the air locking mechanism and is slidably connected to a first counterweight.

[0015] Optionally, the second unloading sealing structure includes a second unloading plate hinged at the feeding end, the second unloading plate is fixedly connected to a second adjusting rod, and the second adjusting rod passes through the air locking mechanism and is slidably connected to a second counterweight.

[0016] Optionally, a negative pressure fan is further included, and the output end of the negative pressure fan is connected to the exhaust end to form a negative pressure environment inside the powder collector.

[0017] As described above, the coal powder sampling device proposed by the utility model has the following beneficial effects:

[0018] (1) In the utility model, a powder collector is provided to form a negative pressure space inside the powder collector, and one end of a negative pressure tube in a sampling assembly is connected to the internal space of the powder collector. When sampling is required, the negative pressure tube guides the negative pressure environment in the powder collector to the sampling tube. One end of the sampling tube connected to the collecting tube generates negative pressure suction to absorb coal powder, thereby improving the efficiency of coal powder entering the sampling tube.

[0019] (2) In the utility model, the air locking mechanism is provided to isolate the coal powder bin and the collecting pipe, thereby preventing the positive pressure in the coal powder bin from entering the collecting pipe, preventing resistance to the falling of the coal powder, and improving the efficiency of the coal powder entering the sampling tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a schematic diagram of an embodiment of the utility model;

[0021] Figure 2 Shown is an enlarged view of point A in one embodiment of the utility model;

[0022] Figure 3 It is an enlarged view of point B in one embodiment of the utility model.

[0023] Description of reference numerals:

[0024] Powder collector 1, input end 2, exhaust end 3, powder discharge valve 4, collection pipe 5, negative pressure fan 6, sampling tube 7, first sampling valve 8, second sampling valve 9, sampling tank 10, filter 11, negative pressure tube 12, negative pressure valve 13, purge tube 14, purge valve 15, air locking mechanism 16, feed end 17, first discharge plate 18, first adjusting rod 19, first counterweight 20, second discharge plate 21, second adjusting rod 22, second counterweight 23, discharge end 24, pulverized coal bin 25. DETAILED DESCRIPTION

[0025] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0026] It should be noted that the diagrams provided in the present embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, so the diagrams only show the components related to the present invention rather than the number, shape and size of the components in the actual implementation. The type, quantity and proportion of each component in the actual implementation can be changed at will, and the layout of the components may be more complicated. The structure, proportion, size, etc. shown in the diagrams attached to this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect and purpose that the present invention can produce. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0027] like Figure 1-Figure 3 As shown, the utility model proposes a coal powder sampling device.

[0028] In an exemplary embodiment, the coal powder sampling device includes: a powder collector 1, the powder collector 1 is provided with an input end 2, an exhaust end 3 and a collection pipe 5, wherein the exhaust end 3 is connected to a negative pressure power, and the internal space of the powder collector 1 forms a negative pressure environment;

[0029] A sampling assembly is arranged on the powder collector 1, and the sampling assembly includes a sampling tube 7 and a negative pressure tube 12, the sampling tube 7 is connected to the collecting tube 5, one end of the negative pressure tube 12 is connected to the internal space of the powder collector 1, and the other end of the negative pressure tube 12 is connected to the sampling tube 7;

[0030] The pulverized coal bin 25 is connected to the output end of the collecting pipe 5 , and a gas locking mechanism 16 is provided between the pulverized coal bin 25 and the output end of the collecting pipe 5 to isolate the gas in the pulverized coal bin 25 from entering the collecting pipe 5 .

[0031] In the present embodiment, a powder collector 1 is provided to form a negative pressure space inside the powder collector 1, and one end of the negative pressure tube 12 in the sampling assembly is connected to the internal space of the powder collector 1. When sampling is required, the negative pressure tube 12 guides the negative pressure environment in the powder collector 1 to the sampling tube 7. One end of the sampling tube 7 connected to the collecting tube 5 generates a negative pressure suction force to absorb the coal powder, thereby improving the efficiency of the coal powder entering the sampling tube 7. In the present embodiment, a powder discharge valve 4 is provided at the connection between the upper end of the collecting tube 5 and the powder collector 1. When the powder discharge valve 4 is opened, the coal powder in the powder collector 1 can enter the powder discharge valve 4 for collection.

[0032] In this embodiment, the air locking mechanism 16 is also provided to isolate the pulverized coal bin 25 from the collecting pipe 5, thereby preventing the positive pressure in the pulverized coal bin 25 from entering the collecting pipe 5, preventing resistance to the falling of the pulverized coal, and improving the efficiency of the pulverized coal entering the sampling tube 7.

[0033] It is worth noting that in this embodiment, the powder collector 1 is a prior art, and the gas-powder mixture entering the input end 2 will be separated in the powder collector 1, the gas will be extracted through the exhaust end 3, and the solid coal powder will remain in the powder collector 1 and be collected from the collection pipe 5 by gravity.

[0034] In an exemplary embodiment, a first sampling valve 8 and a second sampling valve 9 are provided on the sampling tube 7, and the free end of the sampling tube 7 is detachably connected to a sample tank. The connection point between the negative pressure tube 12 and the sampling tube 7 is located between the first sampling valve 8 and the second sampling valve 9, and a negative pressure valve 13 is provided on the negative pressure tube 12.

[0035] In this embodiment, when sampling is required, after opening the first sampling valve 8 and the second sampling valve 9, the negative pressure valve 13 is opened, and the end of the sampling tube 7 connected to the collecting tube 5 sucks the coal powder in the collecting tube 5 through negative pressure, and the coal powder finally enters the sample tank along the sampling tube 7.

[0036] Illustratively, the negative pressure tube 12 in this embodiment is arranged between the first sampling valve 8 and the second sampling valve 9. When the negative pressure tube 12 introduces negative pressure into the sampling tube 7, the first sampling valve 8 and the negative pressure valve 13 need to be opened, thereby forming a function of preventing accidental touch. After opening the first sampling valve 8 and the negative pressure valve 13, the second sampling tube 7 is opened, so that the coal powder can finally enter the sample tank and be collected.

[0037] Exemplarily, a filter 11 is provided at the connection between the negative pressure pipe 12 and the sampling pipe 7. The filter 11 can effectively prevent the coal powder in the sampling pipe 7 from entering the negative pressure pipe 12 and the powder recovery device 1, and can prevent the negative pressure pipe 12 from being blocked.

[0038] In an exemplary embodiment, a purge assembly is also included, which includes a purge tube 14 arranged on the sampling tube 7 and connected to the sampling tube 7, and a purge valve 15 arranged on the purge tube 14, and the connection between the purge tube 14 and the sampling tube 7 is located between the collecting tube 5 and the first sampling valve 8, wherein the free end of the purge tube 14 is used to introduce an inert gas.

[0039] In this embodiment, through the provided cleaning assembly, after sampling is completed, the cleaning valve 15 is opened, and inert gas is introduced into the cleaning pipe 14 to blow off the coal powder remaining in the sampling tube 7 and enter the sample tank for collection.

[0040] Exemplarily, in this embodiment, the inert gas introduced is nitrogen, which can avoid acoustic reaction with the sample, and the airflow force generated at the same time pushes the coal powder in the sampling tube 7 to move along the sampling tube 7.

[0041] In an exemplary embodiment, the air locking mechanism 16 includes a feed end 17 and a discharge end 24 , the feed end 17 is connected to the collecting pipe 5 , and the discharge end 24 is connected to the pulverized coal bin 25 .

[0042] In this embodiment, by connecting the feed end 17 and the discharge end 24 of the air locking mechanism 16 to the collecting pipe 5 and the coal powder bin 25 respectively, the coal powder in the powder collector 1 can eventually enter the coal powder bin 25 through the collecting pipe 5 for collection.

[0043] Exemplarily, the air locking mechanism 16 also includes a first unloading sealing structure and a second unloading sealing structure disposed between the feed end 17 and the discharge end 24, and a coal powder buffer zone is disposed between the first unloading sealing structure and the second unloading sealing structure. The two unloading sealing structures can be used to isolate the coal powder bin 25 from the collecting pipe 5, and the double isolation method ensures that the gas in the collecting pipe 5 enters the coal powder bin 25, preventing the internal space of the coal powder bin 25 from contacting with the air, thereby avoiding safety accidents.

[0044] Exemplarily, the first unloading sealing structure includes a first unloading plate 18 hinged at the feed end 17, a first adjusting rod 19 is fixedly connected to the first unloading plate 18, and the first adjusting rod 19 passes through the air locking mechanism 16 and is slidably connected to the first counterweight 20. In this embodiment, when the coal powder in the collection pipe 5 falls onto the first unloading plate 18 in the first unloading sealing structure, as the weight of the coal powder increases, the weight borne by the first unloading plate 18 is greater than the weight of the first counterweight 20, the unloading plate tilts, and the coal powder on the first unloading plate 18 enters the coal powder buffer zone.

[0045] Exemplarily, the second unloading sealing structure includes a second unloading plate 21 hinged at the feed end 17, a second adjusting rod 22 is fixedly connected to the second unloading plate 21, and the second adjusting rod 22 passes through the air locking mechanism 16 and is slidably connected to a second counterweight 23. In this embodiment, after entering the coal powder buffer, the coal powder falls onto the second unloading plate 21. When the weight of the coal powder accumulated on the second unloading plate 21 is greater than the weight of the second counterweight 23, the second unloading plate 21 is opened, and the coal powder falls into the coal powder bin 25.

[0046] It is worth noting that in this embodiment, the first counterweight 20 in the first unloading sealing structure can slide on the first adjusting rod 19 to adjust the amount of coal powder required to open the first unloading plate 18, and the second counterweight 23 in the second unloading sealing structure can slide on the second adjusting rod 22 to adjust the amount of coal powder required to open the first unloading plate 18.

[0047] It should also be noted that in this embodiment, at the feed end 17, the upper layer of coal powder is accumulated and the lower layer of coal powder enters the air locking mechanism 16, which can effectively isolate the air in the collection pipe 5 from entering, prevent the oxygen in the air from contacting the coal powder, effectively reduce the incidence of safety accidents, and prevent the positive pressure in the coal powder bin 25 from entering the collection pipe 5 and interfering with the sampling process.

[0048] In an exemplary embodiment, the utility model is further provided with a negative pressure fan 6 , the output end of which is connected to the exhaust end 3 , so as to form a negative pressure environment inside the powder collector 1 .

[0049] Specific implementation steps: the first step is to open the negative pressure fan 6 to provide a negative pressure environment inside the powder collector 1, so that the gas-powder mixture enters the powder collector 1. Inside the powder collector 1, the coal powder and the air are separated, and the air is discharged from the exhaust port 3 of the powder collector 1. The coal powder is collected and settled in the powder collector 1, and finally accumulates at the bottom of the powder collector 1. The second step is to open the powder discharge valve 4, and the coal powder is transferred from the internal space of the powder collector 1 to the collecting pipe 5, and enters the coal powder bin 25 through the air locking mechanism 16. The air locking mechanism 16 can isolate the coal powder bin 25 from the collecting pipe 5 to prevent the coal powder from leaking. The positive pressure of the powder bin 25 enters the collecting tube 5 to interfere with the sampling. In the third step, the first sampling valve 8, the second sampling valve 9 and the negative pressure valve 13 are opened. The negative pressure valve 13 guides the negative pressure of the powder collector 1 to the inlet end of the sampling tube 7. The inlet end of the sampling tube 7 sucks the coal powder into the sampling tank 10 to realize sampling. After the sampling reaches a certain amount, the first sampling valve 8 and the negative pressure valve 13 are closed. In the fourth step, the purge valve 15 is opened, and nitrogen is introduced into the purge pipe 14 to blow the coal powder in the sampling tube 7 into the sampling tank 10 to avoid interfering with the sample for the next sampling.

[0050] To sum up, the sampling component set up in the utility model can be linked with the coal powder separation system, and the negative pressure in the coal powder separation system is transferred to the sampling component to achieve efficient sampling of coal powder. At the same time, the coal powder bin 25 and the sampling bin are isolated to avoid airflow connection between the two, thereby preventing the internal environment of the coal powder bin 25 from interfering with the sampling process, thereby improving the efficiency of coal powder sampling.

[0051] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A coal powder sampling device, characterized in that: include: A powder collector, wherein the powder collector is provided with an input end, an exhaust end and a collecting pipe, wherein the exhaust end is connected to a negative pressure power, and the internal space of the powder collector forms a negative pressure environment; A sampling assembly is arranged on the powder collector, the sampling assembly comprises a sampling tube and a negative pressure tube, the sampling tube is connected to the collecting tube, one end of the negative pressure tube is connected to the internal space of the powder collector, and the other end of the negative pressure tube is connected to the sampling tube; A pulverized coal bin is connected to the output end of the collecting pipe. An air locking mechanism is provided between the pulverized coal bin and the output end of the collecting pipe to isolate the gas in the pulverized coal bin from entering the collecting pipe.

2. A coal powder sampling device according to claim 1, characterized in that: The sampling tube is provided with a first sampling valve and a second sampling valve, the connection point between the negative pressure tube and the sampling tube is located between the first sampling valve and the second sampling valve, and the negative pressure tube is provided with a negative pressure valve.

3. A coal powder sampling device according to claim 2, characterized in that: A filter screen is provided at the connection between the negative pressure tube and the sampling tube, and a sample tank is detachably connected to the free end of the sampling tube.

4. A coal powder sampling device according to claim 3, characterized in that: It also includes a cleaning component, which includes a cleaning pipe arranged on the sampling tube and connected to the sampling tube, and a cleaning valve arranged on the cleaning pipe, wherein the connection between the cleaning pipe and the sampling tube is located between the collecting tube and the first sampling valve, wherein the free end of the cleaning pipe is used for introducing an inert gas.

5. A coal powder sampling device according to claim 1, characterized in that: A powder discharge valve is provided at the inlet end of the collecting pipe.

6. A coal powder sampling device according to claim 1, characterized in that: The air locking mechanism comprises a feed end and a discharge end, the feed end is connected to the collecting pipe, and the discharge end is connected to the pulverized coal bin.

7. A coal powder sampling device according to claim 6, characterized in that: The air locking mechanism further comprises a first unloading sealing structure and a second unloading sealing structure arranged between the feeding end and the discharging end, and a coal powder buffer zone is arranged between the first unloading sealing structure and the second unloading sealing structure.

8. A coal powder sampling device according to claim 7, characterized in that: The first unloading sealing structure includes a first unloading plate hinged at the feeding end, a first adjusting rod is fixedly connected to the first unloading plate, and the first adjusting rod passes through the air locking mechanism and is slidably connected to a first counterweight.

9. A coal powder sampling device according to claim 8, characterized in that: The second unloading sealing structure includes a second unloading plate hinged at the feeding end, the second unloading plate is fixedly connected to a second adjusting rod, and the second adjusting rod passes through the air locking mechanism and is slidably connected to a second counterweight.

10. A coal powder sampling device according to claim 1, characterized in that: It also includes a negative pressure fan, the output end of which is connected to the exhaust end, so as to form a negative pressure environment inside the powder collector.

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