Sampling apparatus for fly ash of thermal power plant

Abstract

A sampling apparatus for fly ash of a thermal power plant, said apparatus comprising: an accommodating mechanism (100), comprising a drawing pipe (101) and a connecting pipe (102) arranged at an end portion of the drawing pipe (101), and further comprising a temporary storage pipe (103) arranged at an end portion of the connecting pipe (102), the temporary storage pipe (103) being provided with a discharge channel (104); a first valve plate (200), which is rotatably provided at the end of the temporary storage pipe (103) close to the connecting pipe (102); a second valve plate (300), which is rotatably provided at the end of the discharge channel (104) close to the temporary storage pipe (103); and a drawing mechanism (400), comprising a piston (401) slidably arranged in the temporary storage pipe (103) and a suction rod (402) slidably arranged in the piston (401), and further comprising a reset spring (403) arranged at an end portion of the piston (401). By means of reciprocation of the piston (401), sampling efficiency can be accelerated, and the suction of fly ash can be accelerated. In addition, in the foregoing process, due to the movement of the piston (401), the flow rates of gas and fly ash will increase, and the probability of a blockage occurring can be reduced. After sampling is completed, the interior of the apparatus can be flushed, thereby avoiding blockages after use.

Description

A sampling device for fly ash in a thermal power plant TECHNICAL FIELD

[0001] The present application relates to the technical field of fly ash sampling and detection, and particularly relates to a sampling device for fly ash in a thermal power plant. BACKGROUND

[0002] In order to judge and analyze the combustion state of a combustor in a thermal power plant, fly ash generated by combustion of the combustor needs to be sampled, and the sampled fly ash sample needs to be detected, so that the combustion state of the combustor can be judged by analyzing the composition of the fly ash.

[0003] Since there is a certain pressure difference between the inside and outside of the boiler, the fly ash can flow into the sampler by the pressure difference, but this method may cause the sampler to be blocked, and subsequent sampling cannot be performed, and the sampler needs to be dredged. A common solution is to provide an auger shaft in the sampling pipe, and the auger shaft can be rotated to dredge when the sampling pipe is blocked. However, the provision of the auger shaft affects the flow of the fly ash. Therefore, a sampling device for fly ash in a thermal power plant is provided.

[0004] SUMMARY

[0005] In view of the above or the problem that the sampler is prone to be blocked in the prior art, the present application is provided.

[0006] Therefore, the purpose of the present application is to provide a sampling device for fly ash in a thermal power plant.

[0007] To solve the above technical problems, the present application provides the following technical scheme: a sampling device for fly ash in a thermal power plant, comprising a containing mechanism, which comprises an extraction pipe and a connecting pipe arranged at one end of the extraction pipe, and further comprises a temporary storage pipe arranged at one end of the connecting pipe, wherein an exhaust passage is arranged on the temporary storage pipe; a first valve plate is rotatably arranged at one end of the temporary storage pipe close to the connecting pipe; a second valve plate is rotatably arranged at one end of the exhaust passage close to the temporary storage pipe; an extraction mechanism comprises a piston slidably arranged in the temporary storage pipe, and an extraction rod slidably arranged in the piston, and further comprises a return spring arranged at one end of the piston; an exhaust hole is arranged on the temporary storage pipe, one end of the extraction rod is provided with a first blocking ring, the inside of the extraction rod is provided with a jet port, and one end of the extraction rod is provided with a threaded connector.

[0008] As a preferred scheme of the sampling device for fly ash in a thermal power plant, the extraction mechanism further comprises a sliding ejector rod slidably arranged in the extraction rod, and the sliding ejector rod is provided with a pushing end and a sliding end.

[0009] As a preferred scheme of the sampling device for fly ash in a thermal power plant, the sliding end is provided with a ring groove and a conical surface; the extraction rod is provided with an expansion cavity; and the connecting pipe is provided with a contact rod.

[0010] As a preferred scheme of the sampling device for fly ash of a thermal power plant, wherein: the outer wall of the extraction rod is provided with a second blocking ring, one end of the second blocking ring is provided with a supporting spring.

[0011] As a preferred scheme of the sampling device for fly ash of a thermal power plant, wherein: the extraction mechanism further comprises a threaded end cover screwed on the threaded connector, and a supporting rod arranged on the threaded end cover.

[0012] As a preferred scheme of the sampling device for fly ash of a thermal power plant, wherein: a pushing mechanism arranged on the outer wall of the temporary storage pipe is further included, the pushing mechanism comprises a fixing frame arranged on the outer wall of the temporary storage pipe, and a driving member arranged on the fixing frame, an output shaft of the driving member is fixedly connected with a push plate through a shaft coupling; the outer wall of the extraction rod is provided with a pushing ring; the driving member can control the rotation of the push plate and push the pushing ring.

[0013] As a preferred scheme of the sampling device for fly ash of a thermal power plant, wherein: a reduced diameter portion is arranged on the extraction pipe, and an enlarged diameter portion is arranged on the temporary storage pipe.

[0014] As a preferred scheme of the sampling device for fly ash of a thermal power plant, wherein: the discharge channel comprises a chamber arranged on the enlarged diameter portion, and a U-shaped pipe arranged on the chamber, and a conical cover arranged on the U-shaped pipe, and a docking port arranged on the conical cover.

[0015] As a preferred scheme of the sampling device for fly ash of a thermal power plant, wherein: a collection frame is arranged on the extraction pipe, a partition plate is arranged in the collection frame, and a through hole is arranged on the partition plate.

[0016] As a preferred scheme of the sampling device for fly ash of a thermal power plant, wherein: a scraping ring is arranged on the piston.

[0017] The sampling device for fly ash of a thermal power plant has the following advantages: the reciprocating motion of the piston can accelerate the sampling efficiency and the suction of fly ash, and the flow rate of gas and fly ash can be increased due to the motion of the piston, so that the blocking probability can be reduced, and the inside of the device can be flushed after sampling is completed, so as to avoid blockage after use. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. 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 creating any creative labor.

[0019] Fig. 1 is a schematic diagram of the overall structure of the sampling device for fly ash in a thermal power plant.

[0020] Fig. 2 is a schematic diagram of the sectional structure of the sampling device for fly ash in a thermal power plant.

[0021] Fig. 3 is an enlarged view of A in Fig. 2.

[0022] Fig. 4 is a schematic diagram of the internal structure of the sampling device for fly ash in a thermal power plant.

[0023] Fig. 5 is an enlarged view of B in Fig. 3.

[0024] Fig. 100, containing mechanism; 101, extraction pipe; 101a, reduced diameter part; 101b, collection frame; 101c, partition; 101d, through hole; 102, connecting pipe; 102a, abutting rod; 103, temporary storage pipe; 103a, exhaust hole; 103b, expanded diameter part; 104, discharge passage; 104a, chamber; 104b, U-shaped pipe; 104c, conical cover; 104d, abutting port; 200, No. 1 valve plate; 300, No. 2 valve plate; 400, extraction mechanism; 401, piston; 401a, scraping ring; 402, extraction rod; 402a, No. 1 blocking ring; 402b, pushing ring; 402c, No. 2 blocking ring; 402d, injection port; 402e, threaded connector; 402f, expanded cavity; 403, return spring; 404, sliding ejector rod; 404a, pushing end; 404b, sliding end; 404c, ring groove; 404d, conical surface; 405, threaded end cover; 405a, support rod; 406, support spring; 500, pushing mechanism; 501, fixed frame; 502, driving member; 503, push plate. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0026] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in other manners different from those described herein, and those skilled in the art can make similar generalizations without departing from the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0027] 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. The "in one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or selective embodiment mutually exclusive with other embodiments.

[0028] Embodiment 1, with reference to FIG. 1-5, is the first embodiment of the present application, which provides a sampling device for fly ash of a thermal power plant, comprising a containing mechanism 100, which comprises a suction pipe 101 and a connecting pipe 102 arranged at the end of the suction pipe 101, and a temporary storage pipe 103 arranged at the end of the connecting pipe 102, wherein the temporary storage pipe 103 is provided with an exhaust passage 104; in this embodiment, the front end of the suction pipe 101 of the containing mechanism 100 is inserted into the fly ash sampling port of the boiler, and the sampling device for fly ash of the thermal power plant is arranged in the sampling port.

[0029] A first valve plate 200 is arranged at the end of the temporary storage pipe 103 close to the connecting pipe 102, and a second valve plate 300 is arranged at the end of the exhaust passage 104 close to the temporary storage pipe 103; in this embodiment, the first valve plate 200 is used to separate the temporary storage pipe 103 and the connecting pipe 102, and the second valve plate 300 is used to separate the exhaust passage 104 and the temporary storage pipe 103.

[0030] A suction mechanism 400 is arranged in the temporary storage pipe 103, which comprises a piston 401 slidingly arranged in the temporary storage pipe 103, and a suction rod 402 slidingly arranged in the piston 401, and a return spring 403 arranged at the end of the piston 401; in this embodiment, the elastic force of the return spring 403 can make the piston 401 have a movement tendency towards the connecting pipe 102, and the suction rod 402 can be used to pull the piston 401 to compress the return spring 403.

[0031] The temporary storage pipe 103 is provided with an exhaust hole 103a, one end of the suction rod 402 is provided with a first blocking ring 402a, the inside of the suction rod 402 is provided with a jet port 402d, and one end of the suction rod 402 is provided with a threaded connector 402e; in this embodiment, the exhaust hole 103a can facilitate the suction and exhaust of gas on the side of the piston 401 away from the connecting pipe 102, and facilitate the movement of the piston 401, the first blocking ring 402a at the end of the suction rod 402 can make the piston 401 move together when the suction rod 402 is pulled out, the jet port 402d is arranged at the end close to the first blocking ring 402a, and when the first blocking ring 402a and the surface of the piston 401 are in close contact, the piston 401 covers the outer wall of the jet port 402d.

[0032] In use, the end of the discharge channel 104 of the sampling device of the thermal power plant fly ash is connected to a collection bag, and the outlet of the discharge channel 104 is directed towards the ground. Under the action of gravity, the first valve plate 200 and the second valve plate 300 are in a closed state. By pulling the draw rod 402, the first blocking ring 402a pulls the piston 401 to slide in the temporary storage pipe 103. The piston 401 performs suction, and the return spring 403 is compressed. During suction, gas and fly ash enter the draw pipe 101 together, and the first valve plate 200 is pushed away through the connecting pipe 102. The first valve plate 200 is deflected, and the second valve plate 300 cannot be opened due to suction. Finally, the gas and fly ash are temporarily stored in the temporary storage pipe 103. After pulling the draw rod 402, the draw rod 402 is released. Under the elastic force of the return spring 403, the piston 401 is pushed to reset. During the resetting process of the piston 401, the gas is discharged. During discharge, the first valve plate 200 is closed due to discharge, and the second valve plate 300 is opened under the action of the gas. The gas and fly ash in the temporary storage pipe 103 are pushed into the discharge channel 104 for discharge. Through the reciprocating motion of the piston 401, the sampling efficiency can be accelerated, and the suction of fly ash can be accelerated. Due to the movement of the piston 401, the flow rate of the gas and fly ash can be increased, and the blocking probability can be reduced.

[0033] During the sampling process, whether the draw rod 402 is pulled or the return spring 403 pushes the piston 401 to reset, the first blocking ring 402a and the surface of the piston 401 remain in close contact. The piston 401 can cover the outside of the injection port 402d to form a closed state. After sampling is completed, the high-pressure water pipe can be connected to the threaded connector 402e on the draw rod 402. By pushing the draw rod 402 into the temporary storage pipe 103, the draw rod 402 slides in the piston 401, and the injection port 402d is exposed. At this time, high-pressure water can enter the temporary storage pipe 103. The water flow fills the end of the temporary storage pipe 103 close to the connecting pipe 102. The first valve plate 200 continues to remain closed under the action of water pressure to prevent water flow from entering the sampling port through the connecting pipe 102 and the draw pipe 101. The high-pressure water flow can push the second valve plate 300 to open and enter the discharge channel 104 for flushing, which can avoid blockage after use.

[0034] When the part located in the sampling port needs to be cleaned together, the device can be rotated by one hundred and eighty degrees, so that the outlet of the discharge channel 104 is directed upward, at this time, under the action of gravity, the second valve plate 300 is in the open state, and due to the existence of a certain pressure difference between the inside and outside of the boiler, the flow of gas can assist in pushing the first valve plate 200 to deflect, and again in combination with the action of gravity, the first valve plate 200 can be completely opened, or the piston 401 can be pulled to assist the opening of the first valve plate 200, at this time, the flushing is performed through the connection of the high-pressure water pipe, and the water flow can enter the connecting pipe 102 and the extraction pipe 101, realizing comprehensive cleaning; and when the pressure difference is used to make the fly ash flow by itself for sampling, the first valve plate 200 and the second valve plate 300 can also be opened at the same time in the above-mentioned manner, so that the fly ash is discharged from the discharge channel 104 along with the gas flow.

[0035] Embodiment 2, referring to FIGS. 1-5, is a second embodiment of the present application. Unlike the previous embodiment, the extraction mechanism 400 further includes a sliding push rod 404 slidingly disposed in the extraction rod 402. The sliding push rod 404 is provided with a pushing end 404a and a sliding end 404b. In this embodiment, the sliding end 404b is slidingly disposed in the extraction rod 402, and the pushing end 404a is disposed outside the extraction rod 402. The sliding push rod 404 can slide in the extraction rod 402.

[0036] Specifically, the sliding end 404b is provided with an annular groove 404c and a conical surface 404d. The extraction rod 402 is provided with an expansion cavity 402f. The connecting pipe 102 is provided with a contact rod 102a.

[0037] Further, the outer wall of the extraction rod 402 is provided with a second blocking ring 402c. One end of the second blocking ring 402c is provided with a supporting spring 406. In this embodiment, the supporting spring 406 is sleeved on the outside of the extraction rod 402. One end of the supporting spring 406 abuts against the piston 401. The arrangement of the supporting spring 406 can keep the injection port 402d in the state of being located in the piston 401.

[0038] Preferably, the extraction mechanism 400 further includes a threaded end cover 405 threadedly connected to the threaded connector 402e, and a supporting rod 405a disposed on the threaded end cover 405.

[0039] The remaining structures are the same as those of Embodiment 1.

[0040] When the threaded end cap 405 is connected to the threaded connector 402e without cleaning, the support rod 405a on the threaded end cap 405 will abut against the sliding end 404b, so that the sliding top rod 404 is in a locked state, and the annular groove 404c and the injection port 402d are in an aligned state. The sliding end 404b cuts off the channel between the injection port 402d and the expansion cavity 402f, forming a plugging state.

[0041] Due to the pressure difference between the inside and outside of the boiler, when not sampling, the first valve plate 200 may be slightly deflected due to the pressure difference. Therefore, when cleaning, the first valve plate 200 may have a gap at the beginning of cleaning, causing water to flow into the connecting pipe 102. When cleaning, the threaded end cap 405 is removed first, the support rod 405a is removed, and the high-pressure water pipe is connected to the threaded connector 402e. After the high-pressure water pipe is connected, the water pressure acts on the sliding end 404b, which can keep the annular groove 404c and the injection port 402d in an aligned state to prevent water from flowing out. Then, the pull rod 402 is pushed, the support spring 406 is compressed, and the pull rod 402 and the sliding top rod 404 are extended together until the thrust end 404a abuts against the first valve plate 200. After the thrust end 404a abuts against the first valve plate 200, it is beneficial to the closing of the first valve plate 200. Continuing to push the pull rod 402 will make the sliding end 404b slide, and the annular groove 404c will be connected to the injection port 402d and the expansion cavity 402f at the same time, and water will be sprayed for cleaning. In this state, cleaning can ensure the closing of the first valve plate 200.

[0042] When the entire rotating device is rotated to one hundred and eighty degrees, the part located in the sampling port is cleaned together. At this time, the first valve plate 200 will be opened. In this state, the pull rod 402 and the sliding top rod 404 are extended together until the thrust end 404a abuts against the surface of the abutting rod 102a. Continuing to push the pull rod 402 will make the sliding end 404b slide, and the annular groove 404c will be connected to the injection port 402d and the expansion cavity 402f at the same time, and water will be sprayed for cleaning. During this cleaning process, since the thrust end 404a of the sliding top rod 404 is inserted into the inside of the connecting pipe 102, the first valve plate 200 will not be blocked by the water flow at the end of the connecting pipe 102, ensuring the effect of flushing.

[0043] Embodiment 3, referring to FIG. 1-5, is the third embodiment of the present application, which is different from the previous embodiment in that it further comprises a pushing mechanism 500 arranged on the outer wall of the temporary storage pipe 103, the pushing mechanism 500 comprising a fixed frame 501 arranged on the outer wall of the temporary storage pipe 103, and a driving member 502 arranged on the fixed frame 501, the output shaft of the driving member 502 being fixedly connected with a push plate 503 through a shaft coupling; in this embodiment, the driving member 502 is composed of a worm gear reducer and an electric motor, and the driving member 502 can drive the push plate 503 to rotate.

[0044] The outer wall of the extraction rod 402 is provided with a pushing ring 402b; the driving member 502 can control the rotation of the push plate 503 and push the pushing ring 402b; in this embodiment, the rotation of the push plate 503 can push the pushing ring 402b, and thus the extraction rod 402 can be pushed out or pushed in; it should be noted that, referring to FIG. 2 or FIG. 4, the rotation axis of the push plate 503 is located on the side of the pushing ring 402b away from the temporary storage pipe 103, so that when the push plate 503 pushes the extraction rod 402 out, it can push out a larger stroke, and when it pushes the extraction rod 402 in, the stroke is smaller, so that the piston 401 can have a larger extraction stroke and improve the extraction efficiency.

[0045] When sampling is not performed, the threaded end cap 405 is installed, and the support rod 405a is in a state of abutting against the sliding top rod 404; at this time, the push plate 503 is controlled by the driving member 502 to push the extraction rod 402, so that the pushing end 404a abuts against the first valve plate 200, which can solve the problem of slight deflection of the first valve plate 200 caused by the pressure difference between the inside and outside of the boiler when sampling is not performed, and form an effective seal.

[0046] Specifically, the extraction pipe 101 is provided with a reduced diameter portion 101a, and the temporary storage pipe 103 is provided with an enlarged diameter portion 103b.

[0047] Further, the discharge channel 104 comprises a chamber 104a arranged on the enlarged diameter portion 103b, and a U-shaped pipe 104b arranged on the chamber 104a, and further comprises a conical cover 104c arranged on the U-shaped pipe 104b, the conical cover 104c being provided with a butt joint 104d.

[0048] According to Bernoulli's principle, the pressure is small in the place with large flow rate, the diameter of the connecting pipe 102 is smaller than that of the extraction pipe 101, and the diameter of the extraction pipe 101 is smaller than that of the temporary storage pipe 103, so that the gas and fly ash flow is accelerated through the connecting pipe 102, and is decelerated in the temporary storage pipe 103, thereby avoiding the adhesion and accumulation of fly ash in the connecting pipe 102, solving the problem of fly ash accumulation by a faster flow rate, and accelerating the gas and fly ash in the process of entering the U-shaped pipe 104b, and the cross section of the conical cover 104c is larger than that of the U-shaped pipe 104b, so that the gas flow rate is reduced after the space is enlarged, the gas and fly ash are decelerated, and the collection difficulty is reduced.

[0049] Preferably, the extraction pipe 101 is provided with a collection frame 101b, the collection frame 101b is provided with a partition plate 101c, and the partition plate 101c is provided with a through hole 101d, in the embodiment, the through hole 101d, the partition plate 101c and the collection frame 101b can form a flow guide structure to assist the flow of gas and the collection of fly ash, and the gas is uniformly inhaled.

[0050] Preferably, the piston 401 is provided with a scraper ring 401a, in the embodiment, the scraper ring 401a can facilitate the cleaning of the inner wall of the temporary storage pipe 103 when the piston 401 slides.

[0051] The remaining structures are the same as those in Embodiment 2.

[0052] It should be noted that when the flushing device is as a whole, the collection frame 101b is open upward, and since the height of the interface 104d is higher than that of the opening of the collection frame 101b, the water during flushing can flood the extraction pipe 101 and the collection frame 101b, and overflow from the collection frame 101b, thereby achieving comprehensive cleaning, and after flushing, water remains in the temporary storage pipe 103, which can be guided to flow into the U-shaped pipe 104b by rotating the device as a whole, and the internal residual water can be completely discharged by continuous rotation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited, 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 replaced by equivalents without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A device for sampling fly ash from a thermal power plant, characterized by: Including, The accommodation mechanism (100) includes a suction pipe (101), a connecting pipe (102) arranged at one end of the suction pipe (101), and a temporary storage pipe (103) arranged at one end of the connecting pipe (102), and the temporary storage pipe (103) is provided with a discharge passage (104); A first valve plate (200) is rotatably arranged at one end of the temporary storage pipe (103) close to the connecting pipe (102); A second valve plate (300) is rotatably arranged at one end of the discharge passage (104) close to the temporary storage pipe (103); The suction mechanism (400) includes a piston (401) slidingly arranged in the temporary storage pipe (103), a suction rod (402) slidingly arranged in the piston (401), and a reset spring (403) arranged at one end of the piston (401); The temporary storage pipe (103) is provided with an exhaust hole (103a), one end of the suction rod (402) is provided with a first blocking ring (402a), the inside of the suction rod (402) is provided with a spray port (402d), and one end of the suction rod (402) is provided with a threaded connector (402e).

2. The device for sampling fly ash of a thermal power plant according to claim 1, characterized in that: The suction mechanism (400) further includes a sliding ejector rod (404) slidingly arranged in the suction rod (402), and the sliding ejector rod (404) is provided with a pushing end (404a) and a sliding end (404b).

3. The device for sampling fly ash of a thermal power plant according to claim 2, characterized in that: The sliding end (404b) is provided with a ring groove (404c) and a conical surface (404d); The suction rod (402) is provided with an expansion cavity (402f); The connecting pipe (102) is provided with a contact rod (102a).

4. The device for sampling fly ash of a thermal power plant according to claim 3, characterized in that: The outer wall of the suction rod (402) is provided with a second blocking ring (402c), and one end of the second blocking ring (402c) is provided with a supporting spring (406).

5. The device for sampling fly ash of a thermal power plant according to claim 4, characterized in that: The suction mechanism (400) further includes a threaded end cover (405) screwed on the threaded connector (402e), and a supporting rod (405a) arranged on the threaded end cover (405).

6. A device for sampling fly ash from a thermal power plant according to any one of claims 1 to 5, characterized in that: Further comprising a pushing mechanism (500) arranged on the outer wall of the temporary storage pipe (103), the pushing mechanism (500) includes a fixed frame (501) arranged on the outer wall of the temporary storage pipe (103), and a driving member (502) arranged on the fixed frame (501), and the output shaft of the driving member (502) is fixedly connected with a push plate (503) through a shaft coupling; The outer wall of the suction rod (402) is provided with a pushing ring (402b); The driving member (502) can control the rotation of the push plate (503) and push the pushing ring (402b).

7. The device for sampling fly ash of a thermal power plant according to claim 6, characterized in that: The suction pipe (101) is provided with a reduced diameter portion (101a), and the temporary storage pipe (103) is provided with an expanded diameter portion (103b).

8. The device for sampling fly ash of a thermal power plant according to claim 7, characterized in that: The discharge passage (104) includes a chamber (104a) arranged on the expanded diameter portion (103b), a U-shaped pipe (104b) arranged on the chamber (104a), and a conical cover (104c) arranged on the U-shaped pipe (104b), and the conical cover (104c) is provided with a docking port (104d).

9. The device for sampling fly ash of a thermal power plant according to claim 8, characterized in that: The extraction pipe (101) is provided with a collecting frame (101b), the collecting frame (101b) is provided with a partition plate (101c), and the partition plate (101c) is provided with a through hole (101d).

10. The device for sampling fly ash of a thermal power plant according to claim 9, characterized in that: The piston (401) is provided with a scraping ring (401a).

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