Pulverized coal sampling device

Abstract

The utility model discloses a pulverized coal sampling device, belongs to the technical field of pulverized coal sampling, and solves the problem that an existing pulverized coal sampling device is poor in safety. The pulverized coal sampling device comprises a feeding pipe, a conveying mechanism, a separating mechanism and a sampling mechanism. A feeding port of the feeding pipe is communicated with a coal mill pipeline, and a discharging port of the feeding pipe is connected with the feeding end of the conveying mechanism. The separating mechanism comprises a cyclone separator, an air outlet pipe, a discharging pipe and a fixing frame. And the cyclone separator is arranged on the fixed frame. And the feed port of the cyclone separator is communicated with the discharge end of the transmission mechanism. And the air outlet pipe is communicated with the top end of the cyclone separator. And the blanking pipe is communicated with the bottom end of the cyclone separator. The sampling mechanism is communicated with one end, deviating from the cyclone separator, of the discharging pipe. According to the sampling device, pulverized coal can be sampled, and long-time contact between the pulverized coal and air can be avoided, so that unsafe accidents of spontaneous combustion or explosion of the pulverized coal are avoided, and the safety of the sampling device is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal powder sampling, in particular to a coal powder sampling device. BACKGROUND

[0002] The coal powder sampling device is mainly used for periodic coal powder sampling on the primary air coal powder pipe in the direct-fired pulverizing system. Due to the wear of the grinding part of the coal mill, the change of the coal type and the lump size, the fineness of the coal powder changes greatly, which directly affects the efficiency of the boiler combustion, so it is necessary to periodically sample and detect the fineness of the coal powder.

[0003] The existing coal powder sampling device needs to guide the coal powder by airflow when sampling the coal powder, however, the coal powder is more likely to be oxidized after long-term contact with oxygen in the air, which may cause unsafe accidents such as spontaneous combustion or explosion of the coal powder, and the safety is poor. CONTENT OF THE UTILITY MODEL

[0004] The embodiment of the present application provides a coal powder sampling device, which solves the problem of poor safety of the existing coal powder sampling device.

[0005] The utility model discloses a coal powder sampling device, which comprises a feeding pipe, a conveying mechanism, a separation mechanism and a sampling mechanism.

[0006] In a possible implementation manner, the conveying mechanism comprises a coal powder fan and a guide pipe; the feeding port of the coal powder fan is communicated with the discharge port of the feeding pipe, the discharge port of the coal powder fan is communicated with the feeding port of the guide pipe, and the discharge port of the guide pipe is communicated with the feeding port of the cyclone separator.

[0007] In a possible implementation manner, the conveying mechanism further comprises a first fixing seat and a second fixing seat; the first fixing seat is fixed at the discharge port of the coal powder fan; the second fixing seat is fixed at the feeding port of the guide pipe; the mutually close ends of the first fixing seat and the second fixing seat are mutually attached, and the first fixing seat and the second fixing seat are detachably connected.

[0008] In a possible implementation manner, the transmission mechanism further comprises connecting bolts and a fixing nut; a plurality of first mounting holes are arranged on the first fixing seat and are arranged at intervals around the axial direction of the first fixing seat; a plurality of second mounting holes corresponding to the first mounting holes are arranged on the second fixing seat; one connecting bolt is respectively arranged in each first mounting hole, and the threaded end of the connecting bolt is connected with the fixing nut after penetrating through the corresponding first mounting hole and second mounting hole.

[0009] In a possible implementation manner, the sampling mechanism comprises a sampling pipe, a sampling box and a sampling frame; the feeding port of the sampling pipe and the end of the discharging pipe away from the cyclone separator are communicated; the sampling box is located at the bottom end of the sampling pipe and is communicated with the discharging port of the sampling pipe; the sampling frame is arranged in the inner cavity of the sampling box and is slidably connected with the inner wall of the sampling box.

[0010] In a possible implementation manner, the sampling pipe and the discharging pipe are threadedly connected.

[0011] In a possible implementation manner, the sampling mechanism further comprises a sliding rod, a sliding sleeve and a fastener; the bottom end of the sampling box is fixed with one sliding rod at each corner; the outer wall of each sliding rod is slidably connected with one sliding sleeve; a threaded hole is arranged on each sliding sleeve, and a fastener is arranged in the threaded hole.

[0012] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0013] The coal powder sampling device provided by the embodiments of the present application comprises a feeding pipe, a transmission mechanism, a separation mechanism and a sampling mechanism. The feeding port of the feeding pipe is communicated with the pipeline of the coal mill, and the discharging port of the feeding pipe is connected with the feeding end of the transmission mechanism. The separation mechanism comprises a cyclone separator, an air outlet pipe, a discharging pipe and a fixing frame. The cyclone separator is installed on the fixing frame. The feeding port of the cyclone separator is communicated with the discharging end of the transmission mechanism. The air outlet pipe is communicated with the top end of the cyclone separator. The discharging pipe is communicated with the bottom end of the cyclone separator. The sampling mechanism is communicated with the end of the discharging pipe away from the cyclone separator. The transmission mechanism of the present application can transmit the coal powder in the pipeline of the coal mill to the separation mechanism, the cyclone separator of the separation mechanism can separate the air in the coal powder gas flow from the coal powder, so that the air is discharged from the air outlet pipe and the solid coal powder enters the sampling mechanism through the discharging pipe to be sampled and collected. The coal powder sampling device can not only realize the sampling of the coal powder, but also can avoid the long-time contact of the coal powder with the air, thereby avoiding the unsafe accidents such as the spontaneous combustion or explosion of the coal powder, and further improving the safety of the sampling device. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 The structural schematic diagram of the coal powder sampling device provided by the embodiment of the present application is shown in the figure.

[0016] Figure 2 The explosion view of the coal powder sampling device provided by the embodiment of the present application is shown in the figure.

[0017] Figure 3 The structural schematic diagram of the transmission mechanism and the separation mechanism provided by the embodiment of the present application is shown in the figure.

[0018] Figure 4 The enlarged view of A in the figure. Figure 3

[0019] Figure 5 The structural schematic diagram of the sampling mechanism provided by the embodiment of the present application is shown in the figure.

[0020] Figure: 1 - feed pipe; 2 - transmission mechanism; 21 - coal powder fan; 22 - inlet pipe; 23 - first fixed seat; 24 - second fixed seat; 25 - connecting bolt; 26 - fixed nut; 3 - separation mechanism; 31 - cyclone separator; 32 - air outlet pipe; 33 - discharge pipe; 34 - valve; 35 - fixed frame; 4 - sampling mechanism; 41 - sampling pipe; 42 - sampling box; 43 - sampling frame; 44 - slide rod; 45 - slide sleeve; 46 - fastener. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] ​In the description of the embodiments of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model embodiments and simplifying the description, and it is not indicated or implied that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore it cannot be understood as the limitation of the utility model. The term "first", "second", "third" is only for the purpose of description, and it cannot be understood as indicating or implying relative importance. In addition, the term "installation", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0023] As shown in Figures 1-5 The utility model embodiments provide a kind of coal powder sampling device, which includes feed pipe 1, transmission mechanism 2, separation mechanism 3 and sampling mechanism 4.The feed inlet of feed pipe 1 and coal mill pipeline are communicated, and the discharge port of feed pipe 1 is connected with the feed end of transmission mechanism 2.In practical application, transmission mechanism 2 can transmit coal powder in coal mill pipeline to separation mechanism 3.

[0024] As shown in Figure 3 Separation mechanism 3 includes cyclone 31, air outlet pipe 32, discharge pipe 33 and fixed frame 35.Cyclone 31 is installed on fixed frame 35.The feed inlet of cyclone 31 is communicated with the discharge end of transmission mechanism 2.Cyclone 31 is communicated with the top end of air outlet pipe 32.Discharge pipe 33 is communicated with the bottom end of cyclone 31.In practical application, valve 34 is installed on discharge pipe 33, and valve 34 is used to open and close discharge pipe 33.Specifically, fixed frame 35 is used to fix and support cyclone 31, to increase the stability of cyclone 31 operation.Cyclone 31 can separate air and coal powder in coal powder gas flow, so that air is discharged from air outlet pipe 32, and solid coal powder is discharged through discharge pipe 33, to avoid long-time contact between coal powder and air, to avoid the unsafe accidents of coal powder spontaneous combustion or explosion, to further improve the safety of sampling device.

[0025] In practical application, the end of sampling mechanism 4 and discharge pipe 33 away from cyclone 31 is communicated.Sampling mechanism 4 is used to sample and collect coal powder.

[0026] The utility model discloses an embodiment provides a kind of coal powder sampling device, which comprises feed pipe 1, transmission mechanism 2, separation mechanism 3 and sampling mechanism 4.The feed inlet of feed pipe 1 is communicated with the pipeline of coal mill, and the discharge port of feed pipe 1 is connected with the feed end of transmission mechanism 2.Separation mechanism 3 includes cyclone 31, air outlet pipe 32, discharging pipe 33 and fixed frame 35.Cyclone 31 is installed on fixed frame 35.The feed inlet of cyclone 31 is communicated with the discharge end of transmission mechanism 2.The top end of air outlet pipe 32 is communicated with cyclone 31.The bottom end of discharging pipe 33 is communicated with cyclone 31.Sampling mechanism 4 is communicated with one end of discharging pipe 33, which is away from cyclone 31.The transmission mechanism 2 of the present application can transmit the coal powder in the pipeline of coal mill to separation mechanism 3, and the cyclone 31 of separation mechanism 3 can separate the air in the coal powder gas flow from the coal powder, so that the air is discharged from the air outlet pipe 32, and the solid coal powder enters the sampling mechanism 4 through the discharging pipe 33 for sampling and collection.This not only realizes the sampling of coal powder, but also avoids the long-term contact of coal powder with air, thereby avoiding the occurrence of unsafe accidents such as spontaneous combustion or explosion of coal powder, and further improving the safety of the sampling device.

[0027] As shown in Figure 1 , the transmission mechanism 2 includes a coal powder fan 21 and a guide pipe 22.The feed inlet of coal powder fan 21 is communicated with the discharge port of feed pipe 1, the discharge port of coal powder fan 21 is communicated with the feed inlet of guide pipe 22, and the discharge port of guide pipe 22 is communicated with the feed inlet of cyclone 31.Cyclone 31 is the most commonly used warehouse type coal powder conveying fan in coal powder transportation, which has good transmission function and good explosion-proof performance, avoiding accidents of coal powder during transportation.In actual use, coal powder fan 21 can transmit the coal powder in the pipeline of coal mill to guide pipe 22, and transmit it to separation mechanism 3 through guide pipe 22.

[0028] As shown in Figure 2 , the transmission mechanism 2 further includes a first fixed seat 23 and a second fixed seat 24.The first fixed seat 23 is fixed at the discharge port of coal powder fan 21.The second fixed seat 24 is fixed at the feed inlet of guide pipe 22.The mutually close ends of first fixed seat 23 and second fixed seat 24 are mutually attached, and first fixed seat 23 and second fixed seat 24 are detachably connected.In actual application, the detachable connection of first fixed seat 23 and second fixed seat 24 facilitates the separation of guide pipe 22 and coal powder fan 21, so as to facilitate the cleaning of the discharge port of coal powder fan 21 and guide pipe 22, thereby avoiding the blockage of guide pipe 22 caused by the attachment of coal powder to the inner wall of guide pipe 22 during transportation.

[0029] As shown in Figure 4As shown, the transmission mechanism 2 further comprises connecting bolts 25 and fixing nuts 26. The first fixing seat 23 is provided with a plurality of first mounting holes which are arranged at intervals around the axial direction of the first fixing seat 23. The second fixing seat 24 is provided with a plurality of second mounting holes corresponding to the first mounting holes. One connecting bolt 25 is respectively arranged in each first mounting hole, and the threaded end of the connecting bolt 25 is connected with the fixing nut 26 after passing through the corresponding first mounting hole and second mounting hole. In actual application, when the inlet pipe 22 needs to be cleaned, the fixing nut 26 and the connecting bolt 25 are separated, so that the first fixing seat 23 and the second fixing seat 24 can be separated; when the cleaning of the inlet pipe 22 is completed, the first fixing seat 23 and the second fixing seat 24 are connected through the fixing nut 26 and the connecting bolt 25, which is simple in operation and high in disassembly efficiency.

[0030] As shown in the drawings, Figure 2 The sampling mechanism 4 comprises a sampling pipe 41, a sampling box 42 and a sampling frame 43. The inlet of the sampling pipe 41 is communicated with one end of the discharge pipe 33 away from the cyclone separator 31. The sampling box 42 is located at the bottom end of the sampling pipe 41 and is communicated with the outlet of the sampling pipe 41. The sampling frame 43 is arranged in the inner cavity of the sampling box 42 and is slidably connected with the inner wall of the sampling box 42. In actual application, the solid coal powder in the discharge pipe 33 falls into the inner cavity of the sampling box 42 under the action of gravity, and finally falls on the sampling frame 43 for collection. When sampling of the coal powder is needed, the sampling frame 43 can be pulled out from the sampling box 42. The sampling mechanism 4 of the present application is simple in structure and high in collection efficiency.

[0031] In actual application, the sampling pipe 41 and the discharge pipe 33 are threadedly connected. Specifically, the discharge pipe 33 is provided with a threaded connection port, and the sampling pipe 41 is a threaded pipe. The threadedly connected sampling pipe 41 and discharge pipe 33 are convenient for separation, so that the sampling pipe 41 and the discharge pipe 33 can be cleaned regularly to avoid blockage of the pipes.

[0032] As shown in the drawings, Figure 5As shown, the sampling mechanism 4 further comprises slide rods 44, slide sleeves 45 and fasteners 46. The bottom end of the sampling box 42 is fixed with four slide rods 44 respectively. The outer wall of each slide rod 44 is slidably connected with a slide sleeve 45 respectively. Each slide sleeve 45 is provided with a threaded hole, and the threaded hole is provided with a fastener 46. Specifically, when the sampling tube 41 and the discharging tube 33 need to be cleaned, the fasteners 46 are twisted first to make the slide rods 44 and the slide sleeves 45 in a free sliding state, then the sampling tube 41 is rotated to separate the sampling tube 41 and the discharging tube 33, and then the sampling box 42 is removed to clean the sampling tube 41 and the discharging tube 33; when the cleaning of the sampling tube 41 and the discharging tube 33 is completed, the sampling tube 41 and the discharging tube 33 are aligned first, then the sampling tube 41 is rotated to connect the sampling tube 41 and the discharging tube 33, and then the fasteners 46 are twisted to make the end of the fastener 46 and the outer wall of the slide rod 44 fit, so as to fix the slide rod 44 and the slide sleeve 45.

[0033] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0034] The above examples are only used to illustrate the technical solutions of the present application, and are not limited to the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. A pulverized coal sampling device characterized by comprising: It comprises a feeding pipe (1), a conveying mechanism (2), a separating mechanism (3) and a sampling mechanism (4); The feeding port of the feeding pipe (1) is communicated with the coal mill pipe, and the discharging port of the feeding pipe (1) is connected with the feeding end of the conveying mechanism (2); The separating mechanism (3) comprises a cyclone separator (31), an air outlet pipe (32), a discharging pipe (33) and a fixing frame (35); The cyclone separator (31) is installed on the fixing frame (35); The feeding port of the cyclone separator (31) is communicated with the discharging end of the conveying mechanism (2); The top end of the air outlet pipe (32) is communicated with the cyclone separator (31); The bottom end of the discharging pipe (33) is communicated with the cyclone separator (31); The sampling mechanism (4) is communicated with the end of the discharging pipe (33) which is away from the cyclone separator (31).

2. The pulverized coal sampling device according to claim 1, characterized by, The conveying mechanism (2) comprises a pulverized coal fan (21) and a guide pipe (22); The feeding port of the pulverized coal fan (21) is communicated with the discharging port of the feeding pipe (1), the discharging port of the pulverized coal fan (21) is communicated with the feeding port of the guide pipe (22), and the discharging port of the guide pipe (22) is communicated with the feeding port of the cyclone separator (31).

3. The pulverized coal sampling device according to claim 2, characterized by The conveying mechanism (2) further comprises a first fixing seat (23) and a second fixing seat (24); The first fixing seat (23) is fixed on the discharging port of the pulverized coal fan (21); The second fixing seat (24) is fixed on the feeding port of the guide pipe (22); The ends of the first fixing seat (23) and the second fixing seat (24) which are close to each other are attached to each other, and the first fixing seat (23) and the second fixing seat (24) are detachably connected.

4. The pulverized coal sampling device according to claim 3, characterized by The conveying mechanism (2) further comprises a connecting bolt (25) and a fixing nut (26); A plurality of first mounting holes are arranged on the first fixing seat (23) and are arranged at intervals around the axial direction of the first fixing seat (23); A plurality of second mounting holes corresponding to the first mounting holes are arranged on the second fixing seat (24); One connecting bolt (25) is respectively arranged in each first mounting hole, and the threaded end of the connecting bolt (25) is connected with the fixing nut (26) after penetrating through the first mounting hole and the second mounting hole at the corresponding position.

5. The pulverized coal sampling device according to claim 1, wherein The sampling mechanism (4) comprises a sampling pipe (41), a sampling box (42) and a sampling frame (43); The feeding port of the sampling pipe (41) is communicated with the end of the discharging pipe (33) which is away from the cyclone separator (31); The sampling box (42) is arranged at the bottom end of the sampling pipe (41) and is communicated with the discharging port of the sampling pipe (41); The sampling frame (43) is arranged in the inner cavity of the sampling box (42) and is slidably connected with the inner wall of the sampling box (42).

6. The pulverized coal sampling device according to claim 5, characterized by The sampling pipe (41) and the discharging pipe (33) are threadedly connected.

7. The pulverized coal sampling device according to claim 6, characterized by The sampling mechanism (4) further comprises a sliding rod (44), a sliding sleeve (45) and a fastener (46); The bottom end of the sampling box (42) is fixed with a slide rod (44) respectively; The outer wall of each slide rod (44) is slidably connected with a slide sleeve (45) respectively; Each slide sleeve (45) is provided with a threaded hole, and a fastener (46) is installed in the threaded hole.

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