CN217586342U - Furnace pressure sampling device of thermal power plant - Google Patents

Abstract

The utility model provides a thermal power plant's furnace pressure sampling device belongs to furnace pressure sampling technical field, which comprises a supporting rack, the sample pipeline, clear stifled subassembly and valve, the support frame can be dismantled and connect in the furnace outer wall, the sample pipeline is connected in the support frame, one end extends to inside the furnace, the other end is located the furnace outside and is the tilt up setting, clear stifled subassembly sliding connection in support frame, the degree of freedom along sample pipeline axial displacement has, be used for inserting in the sample pipeline and clear up the deposition from sample pipeline free end, the valve is arranged in sample pipeline and is located on the road and be close to furnace outer wall department, be used for controlling the sample pipeline switching. The utility model provides a pair of furnace pressure sampling device of thermal power plant has and can clear away sample pipeline inner wall deposition through clear stifled subassembly, can make the deposition discharge from sample pipeline outer end, need not manual operation, and the deposition that hardens is easily cleared up, clears up the technological effect of short-term time.

Description

Furnace pressure sampling device of thermal power plant

Technical Field

The utility model belongs to the technical field of furnace pressure sampling, more specifically say, relate to a furnace pressure sampling device of thermal power plant.

Background

The boiler furnace pressure is an important thermal protection parameter of a thermal power plant, and the furnace pressure parameter comprises a switching value and an analog value, wherein the analog value is mainly used for automatically adjusting the furnace pressure and monitoring operation personnel, and the switching value is used for protecting a system. Under the normal operation working condition, the pressure of the hearth is controlled within a specified range by adjusting the air supply quantity and the air induction quantity so as to maintain the safe, stable and economic combustion of the boiler, and when the pressure parameter of the hearth is higher or lower than a protection set value, the high-low MFT protection action of the pressure of the hearth of the boiler is caused.

The device of current to furnace pressure sample easily deposition causes the negative pressure to stir, produces great deviation, exceeds certain pressure and can make the MFT action, causes the unit to jump the machine, influences the unit safety and stability operation. At present, the blockage of a hearth sampling device is cleaned in two modes of manual cleaning and pneumatic blowing. The existing defects are as follows: the labor intensity of manual cleaning of accumulated dust is high, and the time is long; the hardened accumulated dust can not be removed by pneumatic blowing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a thermal power plant's furnace pressure sampling device aims at solving the technical problem of the difficult clearance of deposition that produces when taking a sample to furnace pressure.

In order to achieve the purpose, the utility model adopts the technical proposal that: the utility model provides a thermal power plant furnace pressure sampling device includes:

the support frame is detachably connected to the outer wall of the hearth;

the sampling pipeline is fixedly connected to the support frame, one end of the sampling pipeline extends to the interior of the hearth, the other end of the sampling pipeline is positioned outside the hearth and is arranged in an upward inclined manner, and an end cover is arranged at the outer end of the sampling pipeline;

the blockage removing assembly is connected to the supporting frame in a sliding mode and has freedom degree of axial movement along the sampling pipeline, and the blockage removing assembly is used for being inserted into the sampling pipeline from the free end of the sampling pipeline and removing accumulated dust;

the valve is arranged on the sampling pipeline and close to the outer wall of the hearth and used for controlling the sampling pipeline to be opened and closed; the blockage clearing component is not contacted with the valve;

and after the valve is closed and the end cover is opened, the blockage clearing assembly clears accumulated dust.

In a possible implementation manner, a main slide rail is fixedly connected to the support frame, the length direction of the main slide rail is parallel to the axial direction of the sampling pipeline, the blockage removing component is slidably connected to the main slide rail, and a first limiting component used for limiting the movement of the blockage removing component is arranged on the main slide rail.

In a possible implementation manner, a sliding block is connected to the main sliding rail in a sliding manner, an auxiliary sliding rail is fixedly connected to the sliding block, the length direction of the auxiliary sliding rail is parallel to the axial direction of the sampling pipeline, the blockage clearing component is connected to the auxiliary sliding rail in a sliding manner, and a second limiting part used for limiting the movement of the blockage clearing component is arranged on the auxiliary sliding rail.

In one possible implementation, the blockage clearing component includes:

the two bearing brackets are arranged in parallel, one end of each bearing bracket is connected with the auxiliary slide rail in a sliding way, and the other end of each bearing bracket is provided with a bearing;

the rotating shaft simultaneously penetrates through the bearings on the plurality of supporting brackets, is rotatably connected with the supporting brackets by virtue of the bearings, and axially coincides with the sampling pipeline;

the power output end of the driver is connected with one end of the rotating shaft, which is far away from the sampling pipeline, and the driver is used for driving the rotating shaft to rotate;

one end of the blockage removing rod is detachably connected with one end of the rotating shaft, which is close to the sampling pipeline, and the other end of the blockage removing rod is a free end, and the axial direction of the blockage removing rod is axially overlapped with the axial direction of the rotating shaft;

a plurality of helical blade all locate clear stifled pole outer wall follows clear stifled pole axial sets gradually and forms the heliciform, clear stifled pole is rotatory helical blade outer fringe is used for striking off sample pipeline inner wall deposition.

In a possible implementation manner, the sliding distance of the support bracket is smaller than the sliding distance of the slider, the first limiting member is used for limiting the slider, and the second limiting member is used for limiting the support bracket.

In a possible implementation manner, the thermal power plant furnace pressure sampling device further comprises a remote controller electrically connected with the driver, and the remote controller is used for controlling the rotating speed and the forward and reverse rotation of the driver.

In a possible implementation mode, be located the furnace outside sample pipeline bottom interval is provided with a plurality of bin outlets, sample pipeline bottom be provided with the row's of bin outlet intercommunication expects the pipe, it is used for holding and discharges by to arrange the ash deposit after the clear stifled subassembly clearance.

In a possible embodiment, a discharge valve is arranged on the discharge pipe near the bottom, and the discharge valve is opened to discharge the deposited ash.

In a possible implementation manner, the thermal power plant furnace pressure sampling device further comprises an ash groove positioned below the sampling pipeline, and the ash groove is used for storing the accumulated ash discharged from the discharging pipe.

In one possible implementation, the outer edge of the helical blade is coated with a wear resistant layer.

The utility model provides a pair of furnace pressure sampling device of thermal power plant's beneficial effect lies in: compared with the prior art, the utility model relates to a thermal power plant's furnace pressure sampling device includes the support frame, the sample pipeline, clear stifled subassembly and valve, the support frame can be dismantled and connect in the furnace outer wall, the sample pipeline is connected in the support frame, one end extends to inside the furnace, the other end is located the furnace outside and is the tilt up setting, clear stifled subassembly sliding connection in support frame, the degree of freedom along sample pipeline axial displacement has, be used for inserting in the sample pipeline and clearing up the deposition from the sample pipeline free end, the valve is arranged in on the sample pipeline and is close to furnace outer wall department, be used for controlling the sample pipeline switching, the difficult technical problem who clears up of deposition that produces when taking a sample to furnace pressure has been solved, can remove sample pipeline inner wall deposition through clear stifled subassembly, can make the deposition discharge from sample pipeline outer end, manual operation not, the deposition that hardens, the deposition easily clears up, the short technological effect of time is used in the clearance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a thermal power plant furnace pressure sampling device provided by an embodiment of the present invention (a left side part in the figure represents a furnace);

fig. 2 is a schematic structural view of a sampling pipeline and a blockage clearing component of a thermal power plant furnace pressure sampling device provided by an embodiment of the present invention;

fig. 3 is a schematic structural view of a blockage removing rod and a plurality of helical blades of a thermal power plant furnace pressure sampling device according to an embodiment of the present invention;

fig. 4 is a schematic side view of the blockage removing rod and the plurality of helical blades of the thermal power plant furnace pressure sampling device shown in fig. 3.

Description of reference numerals:

10. a support frame; 20. a sampling pipeline; 21. an end cap; 22. a discharge pipe; 23. a discharge valve; 30. clearing the blockage component; 31. a support bracket; 32. a rotating shaft; 33. a driver; 34. clearing the blockage rod; 35. a helical blade; 36. a wear layer; 40. a valve; 50. a main slide rail; 51. a first limit piece; 52. a slider; 60. an auxiliary slide rail; 61. a second limit piece; 70. a remote controller; 80. an ash tank; 81. and (7) supporting legs.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to fig. 2, a thermal power plant furnace pressure sampling device provided by the present invention will now be described. The thermal power plant hearth pressure sampling device comprises a support frame 10, a sampling pipeline 20, a blockage clearing assembly 30 and a valve 40, wherein the support frame 10 is detachably connected to the outer wall of a hearth; the sampling pipeline 20 is fixedly connected to the support frame 10, one end of the sampling pipeline extends into the hearth, the other end of the sampling pipeline is positioned outside the hearth and is arranged in an upward inclined manner, and an end cover 21 is arranged at the outer end of the sampling pipeline 20; the blockage removing assembly 30 is slidably connected to the support frame 10 and has freedom of axial movement along the sampling pipeline 20, and the blockage removing assembly 30 is used for being inserted into the sampling pipeline 20 from the free end of the sampling pipeline 20 and removing accumulated dust; the valve 40 is arranged on the sampling pipeline 20 and close to the outer wall of the hearth and is used for controlling the opening and closing of the sampling pipeline 20; the blockage removing assembly 30 is not in contact with the valve 40; wherein, after the valve 40 is closed and the end cover 21 is opened, the blockage removing component 30 cleans accumulated dust.

The utility model provides a pair of thermal power plant's furnace pressure sampling device, compared with the prior art, support frame 10 is located furnace's outside portion, be used for supporting sample pipeline 20 and clear stifled subassembly 30, then sample pipeline 20 just can carry out corresponding operation with clear stifled subassembly 30, if to furnace internal pressure sample with to sample pipeline 20 clear stifled operation, for making the interior gas of furnace not leak outward, again can be clear stifled to sample pipeline 20, then set up valve 40 on sample pipeline 20, valve 40 when closed condition through clear stifled subassembly 30 clear sample pipeline 20 inner wall deposition clear up, this clear stifled subassembly 30 is the electrodynamic type part, can not need the manual work to implement the clearance operation, only need open clear stifled subassembly 30 and make clear stifled subassembly 30 remove to sample pipeline 20 inside can, can shift out clear stifled subassembly 30 from sample pipeline 20 after clear stifled completion in, last closing cap end cover 21, open valve 40, so that the operations such as the pressure sample in later stage are carried out. The utility model provides a technical problem to the easy clearance of deposition that produces when furnace pressure samples, have and clear away 20 inner walls deposition of sample pipeline through clear stifled subassembly 30, can make the deposition discharge from 20 outer ends of sample pipeline, without manual operation, the easy clearance of the deposition that hardens, the short technological effect of clearance time.

The support frame 10 is connected in the position of furnace outer wall, and it does not influence furnace's normal use. In the prior art, the hearth pressure sampling device may further include other sampling components, which are not described in this application, and the description is mainly given around the sampling pipeline 20 and the problem of cleaning the dust deposit of the sampling pipeline 20 in this application.

In order to adjust the position of the blockage removing assembly 30, and enable the sampling pipeline 20 to pass in and out in a reciprocating manner, so as to be used for removing accumulated dust when the sampling pipeline enters the sampling pipeline, and not to remove the accumulated dust after the sampling pipeline exits the sampling pipeline, and not to affect the normal operation of the sampling pipeline 20, in some embodiments, referring to fig. 1 to 2, a main slide rail 50 is fixedly connected to the support frame 10, the length direction of the main slide rail 50 is parallel to the axial direction of the sampling pipeline 20, the blockage removing assembly 30 is slidably connected to the main slide rail 50, and a first limiting member 51 for limiting the movement of the blockage removing assembly 30 is arranged on the main slide rail 50. The main slide rail 50 provides the sliding freedom degree for the blockage removing component 30, so that dust deposited on the inner wall of the sampling pipeline 20 can be conveniently removed, the blockage removing component 30 can perform cleaning operation in the sliding process, the blockage removing component can also perform cleaning operation in a static state on the main slide rail 50, and at the moment, the blockage removing component 30 is completely or partially positioned in the sampling pipeline 20 (the cleaning operation can be performed). The position of the first limiting member 51 is movably adjustable.

In some embodiments, referring to fig. 1 to fig. 2, a sliding block 52 is slidably connected to the main sliding rail 50, the sliding block 52 is fixedly connected to an auxiliary sliding rail 60, a length direction of the auxiliary sliding rail 60 is parallel to an axial direction of the sampling pipe 20, the blockage removing assembly 30 is slidably connected to the auxiliary sliding rail 60, and a second limiting member 61 for limiting the blockage removing assembly 30 to move is disposed on the auxiliary sliding rail 60. The length of main slide rail 50 is greater than the length of vice slide rail 60 in this embodiment, can regard main slide rail 50 as "one-level regulation", regard vice slide rail 60 as "second grade regulation", the second grade regulation sets up on the basis of one-level regulation, can only use one-level regulation in this embodiment, also can use one-level regulation and second grade regulation to cooperate, the second grade regulation can be regarded as "fine setting", can all realize the clearance of clear stifled subassembly 30 to the deposition finally. The position of the second limiting member 61 is movably adjustable.

Specifically, the first limiting element 51 and the second limiting element 61 can be screws, bolts or other members, and are connected to the main slide rail 50 and the auxiliary slide rail 60, preferably two and spaced apart from each other, and the blockage clearing assembly 30 is slidably adjusted between the two first limiting elements 51 or the two second limiting elements 61.

In the embodiment, the main slide rail 50 and the auxiliary slide rail 60 adopt a slide bar or a slide bar in the prior art, which enables the blockage clearing component 30 to slide, and can also limit the blockage clearing component 30 through the first limiting part 51 or the second limiting part 61. After the position of the blockage removing assembly 30 is fixed, the blockage removing assembly 30 can be fixed by using the first limiting piece 51 or the second limiting piece 61 to be arranged at the two ends of the blockage removing assembly 30 to limit the blockage removing assembly 30.

In some embodiments, referring to fig. 1 to fig. 2, the blockage removing assembly 30 includes two support brackets 31, a rotating shaft 32, a driver 33, a blockage removing rod 34 and a plurality of spiral blades 35, the two support brackets 31 are arranged in parallel, one end of each support bracket is slidably connected to the auxiliary sliding rail 60, and the other end of each support bracket is provided with a bearing; the rotating shaft 32 simultaneously penetrates through a plurality of bearings on the support bracket 31, the rotating shaft 32 is rotatably connected with the support bracket 31 by virtue of the bearings, and the axial direction of the rotating shaft 32 is axially coincident with the axial direction of the sampling pipeline 20; the power output end of the driver 33 is connected with one end of the rotating shaft 32 far away from the sampling pipeline 20 and is used for driving the rotating shaft 32 to rotate; one end of the blockage removing rod 34 is detachably connected with one end, close to the sampling pipeline 20, of the rotating shaft 32, and the other end of the blockage removing rod is a free end, and the axial direction of the blockage removing rod 34 is axially overlapped with that of the rotating shaft 32; a plurality of helical blade 35 are all located clear stifled 34 outer walls of pole follow clear stifled 34 axial of pole sets gradually and forms the heliciform, clear stifled 34 rotatory in helical blade 35 outer fringe is used for striking off 20 inner walls deposition of sample pipeline. In order to stably support the rotating shaft 32 and keep the driver 33 and the blockage removing rod 34 balanced or stable, two spaced apart support brackets 31 are provided, each support bracket 31 supports one end of the rotating shaft 32, the blockage removing rod 34 is driven to rotate by the driver 33, and the plurality of spiral blades 35 can scrape off dust accumulated on the inner wall of the sampling pipeline 20 during rotation.

It should be noted that the helical blade 35 rotates in the opposite direction to the rotation of the rod 34 so that the accumulated dust can be gradually pushed out of the sampling pipe 20. On the contrary, the accumulated dust is pushed to the inside of the sampling pipe 20, so that the accumulated dust is not easily discharged. The principle of action of the blockage removing assembly 30 is similar to that of a drilling machine in the prior art, and can scrape off deposited dust and take or stir the deposited dust out of the sampling pipeline 20.

Specifically, the driver 33 is a motor or a speed reduction motor, and can rotate forward and backward, the rotating speed is controllable, and the accumulated dust can be shifted to the outside from the outer end of the sampling pipeline 20 through the forward and backward rotation of the blockage removing rod 34. The blockage removing rod 34 and the plurality of helical blades 35 are combined to form a structure similar to an auger, so that the accumulated dust can be conveyed and discharged.

A plurality of helical blade 35 all are the heliciform, then set up one by one on clear stifled pole 34 back, head and the tail interconnect or do not connect in succession, and generally or outward appearance are seen, and a plurality of helical blade 35 can enclose into helical structure, are convenient for this moment by the deposition of scraping off to the outside output of sample pipeline 20. The free end (front end) of the blockage removal rod 34 is pointed.

In some embodiments, referring to fig. 1 to fig. 2, the sliding distance of the supporting bracket 31 is smaller than the sliding distance of the sliding block 52, the first limiting member 51 is used for limiting the sliding block 52, and the second limiting member 61 is used for limiting the supporting bracket 31. The length of the purge rod 34 is greater than the length of the sampling line 20.

In some embodiments, referring to fig. 1 to fig. 2, the furnace pressure sampling apparatus of the thermal power plant further includes a remote controller 70 electrically connected to the driver 33, wherein the remote controller 70 is configured to control the rotation speed and the forward and reverse rotation of the driver 33. The worker can perform operations such as scraping and discharging of the accumulated dust by controlling the operation of the driver 33 using the remote controller 70. The remote controller 70 is a remote controller 70 or a controller commonly used in the art, and control keys are provided thereon.

In some embodiments, referring to fig. 1 to fig. 2, a plurality of discharge openings are arranged at intervals at the bottom of the sampling pipeline 20 located outside the furnace, a discharge pipe 22 is arranged at the bottom end of the sampling pipeline 20 and is communicated with the discharge openings, and the discharge pipe 22 is used for accommodating and discharging the accumulated ash cleaned by the blockage removing assembly 30. The scraped-off dust will fall into the discharge opening and will enter the discharge pipe 22, because the discharge pipe 22 is longer in this embodiment, a certain amount of dust can be stored. In addition to being discharged from the outer end of the sampling pipe 20, the accumulated ash can be discharged from the discharge pipe 22.

In this embodiment, discharge pipe 22 sets up four, and the equipartition sets up, scrapes off the deposition through clear stifled subassembly 30, and the deposition can fall into one or more discharge pipe 22. The upper end of the discharge pipe 22 is detachably connected with the bottom end of the sampling pipeline 20 through a bolt.

In some embodiments, referring to fig. 1-2, a discharge valve 23 is disposed on the discharge pipe 22 near the bottom, and the discharge valve 23 is opened to discharge the deposited ash. When the accumulated ash in the discharge pipe 22 needs to be discharged, the operation is convenient by opening the discharge valve 23. The discharge valve 23 may be a discharge valve or other valve known in the art.

In order to facilitate the collection of the discharged ash, in some embodiments, referring to fig. 1, the thermal power plant furnace pressure sampling device further includes an ash chute 80 located below the sampling pipe 20, wherein the ash chute 80 is used for storing the ash discharged from the discharge pipe 22. Since the ash chute 80 is provided in an inclined shape, the ash chute 80 should be provided as close as possible to the discharge pipe 22 so that the accumulated ash is prevented from leaking out of the discharge pipe 22 because the sampling pipe 20 is inclined, and therefore the ash chute 80 is also provided in an inclined shape.

Specifically, the bottom of the ash chute 80 is provided with a leg 81 for supporting the ash chute 80, and the leg 81 is preferably a telescopic member, so that the height of the ash chute 80 can be adjusted.

In some embodiments, referring to fig. 3 to 4, the outer edge of the helical blade 35 is coated with a wear-resistant layer 36. The wear-resistant layer 36 is not in contact with the inner wall of the sampling pipe 20, and is in a state close to the inner wall of the sampling pipe 20, when the inner wall of the sampling pipe 20 has dust, the helical blade 35 can scrape off the dust, so that the dust is scraped off from the inner wall of the sampling pipe 20. The wear layer 36 is the main part that rubs with the deposited ash, and a part of the deposited ash may contact with the helical blade 35, and the helical blade 35 can also play a role of scraping the deposited ash (the deposited ash may not be completely scraped, and a part of the deposited ash may remain on the inner wall of the sampling pipe 20, and the remaining deposited ash is the deposited ash located at the gap between the helical blade 35 or the wear layer 36 and the inner wall of the sampling pipe 20). When the wear-resistant layer 36 is found to be worn seriously, the outer edge of the spiral blade 35 can be coated with the wear-resistant layer 36 again.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. The utility model provides a furnace pressure sampling device of thermal power plant which characterized in that includes:

the support frame is detachably connected to the outer wall of the hearth;

the sampling pipeline is fixedly connected to the support frame, one end of the sampling pipeline extends to the interior of the hearth, the other end of the sampling pipeline is positioned outside the hearth and is arranged in an upward inclined manner, and an end cover is arranged at the outer end of the sampling pipeline;

the blockage removing assembly is connected to the supporting frame in a sliding mode and has freedom degree of axial movement along the sampling pipeline, and the blockage removing assembly is used for being inserted into the sampling pipeline from the free end of the sampling pipeline and removing accumulated dust;

the valve is arranged on the sampling pipeline and close to the outer wall of the hearth and used for controlling the sampling pipeline to be opened and closed; the blockage removing assembly is not in contact with the valve;

and after the valve is closed and the end cover is opened, the blockage removing assembly is used for removing accumulated dust.

2. The thermal power plant furnace pressure sampling device according to claim 1, wherein a main slide rail is fixedly connected to the support frame, a length direction of the main slide rail is parallel to an axial direction of the sampling pipeline, the blockage removing assembly is slidably connected to the main slide rail, and a first limiting member for limiting the movement of the blockage removing assembly is arranged on the main slide rail.

3. The thermal power plant furnace pressure sampling device according to claim 2, wherein a sliding block is slidably connected to the main sliding rail, an auxiliary sliding rail is fixedly connected to the sliding block, the length direction of the auxiliary sliding rail is parallel to the axial direction of the sampling pipeline, the blockage cleaning assembly is slidably connected to the auxiliary sliding rail, and a second limiting member for limiting the movement of the blockage cleaning assembly is arranged on the auxiliary sliding rail.

4. A thermal power plant furnace pressure sampling apparatus as defined in claim 3, wherein said unblocking assembly comprises:

the two bearing brackets are arranged in parallel, one end of each bearing bracket is connected with the auxiliary sliding rail in a sliding manner, and the other end of each bearing bracket is provided with a bearing;

the rotating shaft simultaneously penetrates through the bearings on the plurality of supporting brackets, is rotatably connected with the supporting brackets by virtue of the bearings, and axially coincides with the sampling pipeline;

the power output end of the driver is connected with one end, far away from the sampling pipeline, of the rotating shaft and is used for driving the rotating shaft to rotate;

one end of the blockage removing rod is detachably connected with one end, close to the sampling pipeline, of the rotating shaft, the other end of the blockage removing rod is a free end, and the axial direction of the blockage removing rod is axially overlapped with that of the rotating shaft;

a plurality of helical blade all locate clear stifled pole outer wall follows clear stifled pole axial sets gradually and forms the heliciform, clear stifled pole is rotatory helical blade outer fringe is used for striking off sample pipeline inner wall deposition.

5. The thermal power plant furnace pressure sampling device according to claim 4, wherein the sliding distance of the support bracket is smaller than the sliding distance of the sliding block, the first limiting member is used for limiting the sliding block, and the second limiting member is used for limiting the support bracket.

6. The thermal power plant furnace pressure sampling device according to claim 4, further comprising a remote controller electrically connected to the driver, wherein the remote controller is configured to control the rotational speed and the forward and reverse rotation of the driver.

7. The thermal power plant furnace pressure sampling device as recited in claim 1, wherein a plurality of discharge openings are arranged at intervals at the bottom of the sampling pipeline outside the furnace, and a discharge pipe communicated with the discharge openings is arranged at the bottom end of the sampling pipeline and used for accommodating and discharging the accumulated ash cleaned by the blockage cleaning assembly.

8. The thermal power plant furnace pressure sampling apparatus as claimed in claim 7, wherein a discharge valve is provided on the discharge pipe near the bottom, and the discharge valve is opened to discharge the accumulated ash.

9. The thermal power plant furnace pressure sampling device according to claim 7, further comprising an ash chute located below the sampling pipe, the ash chute being configured to store accumulated ash discharged from the discharge pipe.

10. The thermal power plant furnace pressure sampling device according to claim 4, wherein the outer edge of the helical blade is coated with a wear resistant layer.

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