Pulverized coal sampling apparatus for boiler of thermal power plant

Abstract

A pulverized coal sampling apparatus for a boiler of a thermal power plant, said apparatus comprising: a bearing assembly (100), comprising an outer housing (101), a fixing ring (102) arranged on an end surface of the outer housing (101), recess plates (102c) circumferentially arrayed on an end surface of the fixing ring (102), and a conical box (102a) arranged on each recess plate (102c) and used for sampling pulverized coal; and a blocking assembly (200), comprising a pull rod (201) movably arranged in the outer housing (101) and blocking members (202) arranged on an end surface of the pull rod (201) and used for sealing the conical boxes (102a). During a sampling operation, a plurality of portions of pulverized coal can be sampled at one time by means of the conical boxes (102a) on the bearing assembly (100), and the sampled pulverized coal is sealed by means of the blocking assembly (200), thereby preventing the pulverized coal from spilling out, and effectively solving the problems in the existing technology.

Description

Coal powder sampling device for boiler of thermal power plant TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal power plants, in particular to a coal powder sampling device for a boiler of a thermal power plant. BACKGROUND

[0002] A boiler of a thermal power plant is an industrial device specially designed to convert chemical energy in fuels such as coal, oil or natural gas into heat energy through a combustion process. It transfers this heat energy to water through an internal heat exchanger system, causing the water to heat up and transform into high-pressure steam. These steam is then used to drive a steam turbine, which in turn generates electrical energy. The boiler contains key components such as combustion chamber, furnace, water-cooled wall tube, superheater, reheater, etc., as well as advanced control systems to monitor and regulate the combustion process, ensuring safety and efficiency. In addition, modern boilers are equipped with dust removal equipment and emission control systems to reduce environmental impact, while adopting clean combustion technology and efficient heat energy recovery systems to improve energy utilization efficiency.

[0003] During actual use, the boiler of the thermal power plant needs to sample coal powder, mainly because coal powder is the main fuel for combustion, and its quality and characteristics directly affect the combustion efficiency, heat energy output, pollutant emission and operation safety of the boiler. By sampling, the particle size distribution, calorific value, moisture content, sulfur content and ash content of the coal powder can be monitored to ensure that the coal powder meets the requirements of the boiler combustion, adjust the combustion conditions and coal powder preparation process in a timely manner, optimize the combustion efficiency, reduce fuel waste, control pollutant emissions, prevent equipment wear and corrosion, and thus ensure the economic operation and environmental compliance of the thermal power plant.

[0004] In order to improve the reliability and representativeness of data, reduce accidental errors, and ensure that the coal powder sample truly reflects the characteristics of the entire material flow, the existing sampling device needs to sample the same sampling point multiple times when performing sampling operations. In the prior art, the worker needs to sample one by one when sampling the same sampling point multiple times.

[0005] The above sampling method not only increases the work efficiency of the worker, but also increases the time interval of sampling and analysis, which may result in the inability to capture the rapid changes in the quality of the coal powder in real time, thereby affecting the immediate adjustment and control of the boiler combustion. In addition, the multiple sampling may reduce the representativeness and continuity of the data due to the changes in the characteristics of the coal powder flow within the sampling interval, increasing the uncertainty of the evaluation of the entire coal powder flow characteristics. SUMMARY

[0006] In view of the problems existing in the prior art, the present application is proposed.

[0007] To solve the above technical problems, the application provides the following technical scheme: a coal powder sampling device for a boiler of a thermal power plant, comprising a bearing assembly and a blocking assembly, wherein the bearing assembly comprises an outer shell, a fixed ring arranged at an end surface of the outer shell, groove plates arranged in a circumferential array at an end surface of the fixed ring, and a conical box arranged on the groove plates and used for sampling coal powder; and the blocking assembly comprises a pull rod movably arranged in the outer shell and a blocking piece arranged at an end surface of the pull rod and used for sealing the conical box.

[0008] As a preferred scheme of the coal powder sampling device for the boiler of the thermal power plant, a connecting channel is formed between each groove plate, the blocking piece comprises a fixed plate arranged outside the pull rod and an L-shaped plate screwed on the fixed plate, and an outer wall of the L-shaped plate is movably connected with the connecting channel.

[0009] As a preferred scheme of the coal powder sampling device for the boiler of the thermal power plant, an inclined end for mounting the L-shaped plate is arranged on an outer wall of the fixed plate, and a pointed end is further arranged at an end of the L-shaped plate.

[0010] As a preferred scheme of the coal powder sampling device for the boiler of the thermal power plant, a through ring is arranged in the outer shell, a key block is arranged on an outer wall of the pull rod, an inner wall of the outer shell is provided with a connecting end connected with the key block, and the connecting end comprises a vertical groove and a horizontal groove in communication with one end of the vertical groove.

[0011] As a preferred scheme of the coal powder sampling device for the boiler of the thermal power plant, an end of the pull rod away from the blocking piece extends to the outside of the outer shell and is provided with a knob, a first elastic piece is arranged between one end of the knob and the outer shell, and the other end of the knob is provided with an auxiliary handle; an anti-skid groove is further arranged on an outer wall of the outer shell.

[0012] As a preferred scheme of the coal powder sampling device for the boiler of the thermal power plant, an inner wall of the conical box is provided with a storage cavity, and one side of an outer wall of the conical box is designed as an opening.

[0013] As a preferred scheme of the coal powder sampling device for the boiler of the thermal power plant, a scattering assembly is further arranged, and the scattering assembly comprises a trigger plate movably arranged at a bottom of the conical box and a scattering disc movably arranged in the storage cavity.

[0014] As a preferred scheme of the coal powder sampling device for the boiler of the power plant, the bottom of the conical box is provided with a first transmission channel, a transmission block is arranged in the first transmission channel, an eccentric wheel is further arranged in the conical box, an extension rod is arranged on one side of the outer wall of the eccentric wheel, a transmission groove is arranged on the outer wall of the extension rod and can be connected with the transmission block, and the end surface of the extension rod is connected with the trigger plate.

[0015] As a preferred scheme of the coal powder sampling device for the boiler of the power plant, the outer wall of the extension rod is provided with a second elastic element, and the other side of the outer wall of the eccentric wheel is provided with an eccentric shaft.

[0016] As a preferred scheme of the coal powder sampling device for the boiler of the power plant, the outer wall of the extension rod is provided with a second elastic element, and the other side of the outer wall of the eccentric wheel is provided with an eccentric shaft.

[0017] The sampling device provided in the application can sample multiple portions of coal powder at a time through the conical box on the bearing assembly, and can seal the sampled coal powder through the sealing assembly to avoid coal powder spilling, thereby effectively solving the problems in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] FIG. 1 is a schematic diagram of the overall structure in the present application.

[0020] FIG. 2 is a schematic diagram of the structure of the bearing assembly in the present application.

[0021] FIG. 3 is a schematic diagram of the structure of the sealing assembly in the present application.

[0022] FIG. 4 is a schematic diagram of the cross-sectional structure of the outer shell in the present application.

[0023] FIG. 5 is a schematic diagram of the structure of the conical box and part of the structure thereof in the present application.

[0024] FIG. 6 is a schematic diagram of the structure of the transmission plate in the present application.

[0025] FIG. 7 is a schematic diagram of the structure of the eccentric wheel in the present application.

[0026] In the figure: 100, bearing assembly; 101, outer shell; 101a, anti-skid groove; 101b, connecting end; 101b-1, vertical groove; 101b-2, horizontal groove; 102, fixing ring; 102a, conical box; 102a-1, storage cavity; 102b, connecting channel; 102c, groove plate; 103, through ring; 200, plugging assembly; 201, pull rod; 201a, key block; 202, plugging piece; 202a, fixing plate; 202a-1, inclined end; 202b, L-shaped plate; 202b-1, pointed end; 203, knob; 203a, first elastic piece; 203b, auxiliary handle; 300, scattering assembly; 301, trigger plate; 302, eccentric wheel; 302a, telescopic rod; 302a-1, transmission groove; 302b, eccentric shaft; 303, transmission plate; 303a, second transmission channel; 303b, scattering disc; 303b-1, protrusion. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in conjunction with the drawings of the specification.

[0028] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0029] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is separate or alternative to other embodiments.

[0030] Embodiment 1, referring to FIGS. 1-3, is the first embodiment of the present application, which provides a pulverized coal sampling device for a boiler of a thermal power plant. The device can sample multiple portions of coal powder at one time through the conical box 102a on the bearing assembly 100, and can seal the sampled coal powder through the plugging assembly 200 to avoid coal powder spilling.

[0031] Specifically, the bearing assembly 100 includes an outer shell 101, a fixing ring 102 arranged on the end face of the outer shell 101, a groove plate 102c arranged in a circumferential array on the end face of the fixing ring 102, and a conical box 102a arranged on the groove plate 102c for sampling coal powder. The outer shell 101 is hollow and both sides are designed as open. The material of the groove plate 102c is preferably plastic material, which can provide a certain deformation effect according to the structural characteristics of the plastic itself.

[0032] The plugging assembly 200 comprises a pull rod 201 movably arranged in the outer shell 101 and a plugging piece 202 arranged at the end face of the pull rod 201 for sealing the conical box 102a. The plugging piece 202 is used to seal the conical box 102a. When the plugging piece 202 is away from the conical box 102a, the conical box 102a is opened, and vice versa.

[0033] It should be noted that sampling multiple times at the same sampling point is better than sampling at different times. The advantage is that it can capture the real-time characteristics of the coal powder flow and provide continuous and representative coal quality data. This method reduces the data lag caused by time intervals, ensures the timeliness and accuracy of the data, helps to quickly respond to small changes in coal quality, realizes accurate control of the boiler combustion process, optimizes the combustion efficiency, and reduces the risk of environmental pollution and equipment failure caused by coal quality fluctuations.

[0034] In summary, when performing sampling operations, the device can be inserted into the sampling point as a whole, and then the pull rod 201 in the plugging assembly 200 is pushed, so that the plugging piece 202 is away from the conical box 102a. At this time, the whole sampling device is rotated, so that the coal powder enters the conical box 102a, and finally the pull rod 201 is reset, so that the conical box 102a is closed. At this time, the sampling device can be taken out of the sampling point, and the sampled coal powder is obtained.

[0035] The conical design of the conical box 102a can make the coal powder better enter the box body.

[0036] Embodiment 2, referring to FIGS. 1-4, is a second embodiment of the present application. Unlike the previous embodiment, a way is provided to facilitate the separation of coal powder from the conical box 102a.

[0037] Specifically, the connection channels 102b are formed between the groove plates 102c, and the plugging piece 202 comprises a fixed plate 202a arranged outside the pull rod 201 and an L-shaped plate 202b screwed on the fixed plate 202a. The outer wall of the L-shaped plate 202b is movably connected with the connection channel 102b.

[0038] The outer wall of the fixed plate 202a is provided with an inclined end 202a-1 for mounting the L-shaped plate 202b, and the end of the L-shaped plate 202b is further provided with a pointed end 202b-1. Due to the arrangement of the inclined end 202a-1, the top of the L-shaped plate 202b is also inclined.

[0039] The outer shell 101 is provided with a through ring 103, the outer wall of the pull rod 201 is provided with a key block 201a, the inner wall of the outer shell 101 is provided with a connecting end 101b connected with the key block 201a, and the connecting end 101b comprises a vertical slot 101b-1 and a horizontal slot 101b-2 in communication with one end of the vertical slot 101b-1. The middle part of the through ring 103 is used for the pull rod 201 to pass through, and the coal powder can be prevented from entering the outer shell 101 to a certain extent.

[0040] The end of the pull rod 201 away from the plugging piece 202 extends to the outside of the outer shell 101 and is provided with a knob 203, one end of the knob 203 is provided with a first elastic piece 203a between the outer shell 101, and the other end of the knob 203 is provided with an auxiliary handle 203b; the outer wall of the outer shell 101 is also provided with an anti-skid groove 101a. The first elastic piece 203a is a compression spring. The inner wall of the conical box 102a is provided with a storage cavity 102a-1, and one side of the outer wall of the conical box 102a is designed as an opening.

[0041] In summary, in combination with the first embodiment, when the coal powder enters the storage cavity 102a-1 and needs to be discharged for subsequent detection, the sampling device can be in a vertical state, and the conical box 102a is kept below. At this time, the pull rod 201 does not need to be pushed, and when the coal powder needs to be separated from the storage cavity 102a-1, the pull rod 201 is rotated, so that the key block 201a enters the horizontal slot 101b-2 from the vertical slot 101b-1. During this process, the L-shaped plate 202b deforms the groove plate 102c and comes into contact with the conical box 102a.

[0042] Due to the deformation of the groove plate 102c and the "hiding" of the L-shaped plate 202b, the coal powder will be accelerated to separate from the storage cavity 102a-1 and avoid sticking to the L-shaped plate 202b. At this time, the sampling device in the vertical state will provide six samples on the workbench for subsequent detection work.

[0043] It should be noted that the knob 203 can facilitate the staff to control the rotation of the pull rod 201, the first elastic piece 203a will provide a certain reset effect of the pull rod 201 during the sampling process, that is, the action of pushing the pull rod 201 away from the conical box 102a, and the auxiliary handle 203b is convenient for the staff to hold the whole device.

[0044] Embodiment 3, referring to FIGS. 1-7, is the third embodiment of the present application, which is different from the previous embodiment in that it provides a scattering assembly 300 to further accelerate the separation of coal powder from the conical box 102a.

[0045] Specifically, it further comprises a scattering assembly 300, which comprises a trigger plate 301 movably arranged at the bottom of the conical box 102a and a scattering disc 303b movably arranged in the storage cavity 102a-1. When the coal powder needs to be separated from the conical box 102a, the scattering disc 303b is controlled to move, so that the lumped coal powder is accelerated to fall out of the conical box 102a.

[0046] A first transmission channel is formed through the bottom of the conical box 102a, and a transmission block is arranged in the first transmission channel. An eccentric wheel 302 is further arranged in the conical box 102a, and an extension rod 302a is arranged on one side of the outer wall of the eccentric wheel 302. A transmission groove 302a-1 connectable with the transmission block is formed through the outer wall of the extension rod 302a, and the end surface of the extension rod 302a is connected with the trigger plate 301. When the trigger plate 301 is pressed, the extension rod 302a is stretched or contracted, and a bearing is arranged at the connection between the trigger plate 301 and the extension rod 302a, so that the extension rod 302a does not collide with the trigger plate 301 during rotation.

[0047] A second elastic member is arranged on the outer wall of the extension rod 302a, and an eccentric shaft 302b is arranged on the other side of the outer wall of the eccentric wheel 302. The second elastic member is a compression spring, so that the extension rod 302a has a certain reset effect after stretching or contraction.

[0048] A transmission plate 303 is arranged on the outer wall of the scattering disc 303b, and a second transmission channel 303a connectable with the eccentric shaft 302b is formed through the end surface of the transmission plate 303. A plurality of protrusions 303b-1 are arranged on the end surface of the scattering disc 303b. The transmission plate 303 can be displaced horizontally along a certain stroke in the storage cavity 102a-1 (which has been fully described in the prior art and will not be described in detail here).

[0049] In summary, according to the above embodiment, when the L-shaped plate 202b contacts the inner end surface of the conical box 102a, the trigger plate 301 is gradually pressed to move close to the conical box 102a. At this time, the extension rod 302a is stretched or contracted, and the transmission block in the first transmission channel cooperates with the transmission groove 302a-1, so that the extension rod 302a rotates.

[0050] Once the extension rod 302a rotates, the eccentric shaft 302b on the eccentric wheel 302 cooperates with the second transmission channel 303a to give power to the transmission plate 303, so that the transmission plate 303 moves horizontally within the horizontal stroke limit, and drives the scattering disc 303b and the protrusions 303b-1 to scatter the coal powder and accelerate the process of falling out of the coal powder.

[0051] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications can be made to the embodiments without departing from the spirit and scope of the application, as described in the claims (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc. and the like). For example, the elements shown as integrally formed can be constructed of a number of separate elements, which can be assembled or attached together. The position of elements can be reversed or otherwise varied and the nature or number of elements can be altered or varied. Accordingly, all such modifications are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be varied or re-sequenced without departing from the spirit of the application. Any "apparatus" or "device" described herein can be used in combination with any other "apparatus" or "device" described herein. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and also cover structures yet to be invented which perform the recited function but operate in a different manner. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the spirit of the application as expressed in the appended claims. Accordingly, the application is not limited to the particular embodiments described and shown herein, but extends to all structures that fall within the scope of the claims.

[0052] Furthermore, in order to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described (i.e., those not necessary to enable one to practice the present application, or those not commonly or monotonically associated with implementing the present application).

[0053] It is understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts can inevitably lead to a number of substitutions, modifications, changes and omissions. Such are the normal consequences of design choices and engineering decisions maintained or available to those of ordinary skill in the art, not deficiencies or insufficiencies with the present application. Accordingly, the development effort might be unpredictable and the actual implementation might include numerous substitutions, modifications, changes and omissions as compared to the disclosure hereof.

[0054] It should be noted that the above examples are merely used to illustrate the technical solutions of the present application, but not to limit the present application, and although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application, and all these modifications and equivalents should be included in the scope of the claims of the present application.

Claims

1. A pulverized coal sampling device for a boiler of a thermal power plant, characterized by: The utility model relates to a coal sampling device, which comprises a bearing assembly (100) and a plugging assembly (200). The bearing assembly (100) comprises an outer shell (101), a fixing ring (102) arranged at the end face of the outer shell (101), a groove plate (102c) arranged at the end face of the fixing ring (102) in a circumferential array, and a conical box (102a) arranged on the groove plate (102c) and used for sampling coal powder. The plugging assembly (200) comprises a pull rod (201) movably arranged in the outer shell (101) and a plugging piece (202) arranged at the end face of the pull rod (201) and used for sealing the conical box (102a).

2. The pulverized coal sampling device for a boiler of a thermal power plant according to claim 1, characterized in that: Connecting channels (102b) are formed between the groove plates (102c), and the plugging piece (202) comprises a fixed plate (202a) arranged outside the pull rod (201) and an L-shaped plate (202b) screwed on the fixed plate (202a), wherein the outer wall of the L-shaped plate (202b) is movably connected with the connecting channels (102b).

3. The pulverized coal sampling device for a boiler of a thermal power plant according to claim 2, characterized in that: The outer wall of the fixed plate (202a) is provided with an inclined end (202a-1) for mounting the L-shaped plate (202b), and the end of the L-shaped plate (202b) is further provided with a pointed end (202b-1).

4. The pulverized coal sampling device for a boiler of a thermal power plant according to claim 2, characterized in that: A through ring (103) is arranged in the outer shell (101), the outer wall of the pull rod (201) is provided with a key block (201a), the inner wall of the outer shell (101) is provided with a connecting end (101b) connected with the key block (201a), and the connecting end (101b) comprises a vertical groove (101b-1) and a horizontal groove (101b-2) in communication with one end of the vertical groove (101b-1).

5. The pulverized coal sampling device for a boiler of a thermal power plant according to claim 4, characterized in that: The end of the pull rod (201) away from the plugging piece (202) extends to the outside of the outer shell (101) and is provided with a knob (203), one end of the knob (203) is provided with a first elastic member (203a) between the outer shell (101), the other end of the knob (203) is provided with an auxiliary handle (203b), and the outer wall of the outer shell (101) is further provided with an anti-skid groove (101a).

6. The pulverized coal sampling device for a boiler of a thermal power plant according to claim 5, characterized in that: The inner wall of the conical box (102a) is provided with a storage cavity (102a-1), and one side of the outer wall of the conical box (102a) is designed as an opening.

7. The pulverized coal sampling device for a boiler of a thermal power plant according to claim 6, characterized in that: The utility model further comprises a scattering assembly (300) comprising a trigger plate (301) movably arranged at the bottom of the conical box (102a) and a scattering disc (303b) movably arranged in the storage cavity (102a-1).

8. The pulverized coal sampling device for a boiler of a thermal power plant according to claim 7, characterized in that: The bottom of the conical box (102a) is provided with a first transmission channel, and a transmission block is arranged in the first transmission channel, the conical box (102a) is further provided with an eccentric wheel (302), one side of the outer wall of the eccentric wheel (302) is provided with a telescopic rod (302a), the outer wall of the telescopic rod (302a) is provided with a transmission groove (302a-1) connectable with the transmission block, and the end face of the telescopic rod (302a) is connected with the trigger plate (301).

9. The pulverized coal sampling device for a boiler of a thermal power plant according to claim 8, characterized in that: The outer wall of the telescopic rod (302a) is sleeved with a second elastic member, and the outer wall of the eccentric wheel (302) is provided with an eccentric shaft (302b) on the other side.

10. The pulverized coal sampling device for a boiler of a thermal power plant according to claim 9, characterized in that: The outer wall of the scattering disc (303b) is provided with a transmission plate (303), and the end surface of the transmission plate (303) is provided with a second transmission channel (303a) connected with the eccentric shaft (302b) and penetratingly arranged, and the end surface of the scattering disc (303b) is provided with a plurality of protrusions (303b-1).

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