CN216816716U - Coal fired boiler powder pipe wind speed measuring device - Google Patents
Coal fired boiler powder pipe wind speed measuring device Download PDFInfo
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- CN216816716U CN216816716U CN202220505952.9U CN202220505952U CN216816716U CN 216816716 U CN216816716 U CN 216816716U CN 202220505952 U CN202220505952 U CN 202220505952U CN 216816716 U CN216816716 U CN 216816716U
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Abstract
The utility model provides a coal-fired boiler powder pipe wind speed measuring device, which comprises a sampling pipe connected on a coal-fired boiler powder pipe flange interface through a flange plate, a pressure transmission pipe connected on the sampling pipe, and a pressure guide pipe with two end parts respectively communicated with the pressure transmission pipe and a transmitter, wherein the upper end part of the sampling pipe vertically extends upwards and is connected with an end socket, and the lower end part is vertically inserted in the powder pipe, the scheme abandons welding connection and is convenient to maintain, a wear-resistant sleeve is sleeved at the lower end part of the sampling pipe, so that the sampling pipe is more wear-resistant, an anti-blocking pendulum bob comprising a cycloid and a plumbum connected at the lower end part of the cycloid is arranged in the sampling pipe, the upper end part of the cycloid is fixed in the sampling pipe through a snap ring, the plumbum is positioned below an opening at the bottom of the sampling pipe, primary wind in the powder pipe can be used for driving the plumbum to swing, so that the cycloid scratches the inner wall of the sampling pipe to clean coal powder accumulated on the inner wall, thereby realizing automatic cleaning, the sampling tube is not easy to block, and the cycloid scraping replaces the hanging chain knocking, so that the sampling tube and the wear-resistant sleeve are not damaged, and the service life is long.
Description
Technical Field
The utility model relates to the technical field of coal-fired boilers, in particular to a coal-fired boiler powder pipe wind speed measuring device.
Background
The coal-fired boiler powder pipe is a pipeline for sending pulverized coal into a hearth by utilizing primary air, the air speed in the powder pipe can influence the combustion working condition and the combustion efficiency of a boiler, the powder pipe can be blocked due to too low air speed, and an air speed measuring device is required to be arranged to monitor the air speed in the powder pipe.
Most of existing wind speed measuring devices are welded on a powder pipe, a steel backrest pipe which is vertically inserted into the powder pipe is used as a sampling pipe for sampling, and a pressure guide pipe is used for leading out the sampling pipe for measurement, the mode is inconvenient to overhaul, wear-resistant and difficult to clean coal dust accumulated on the inner wall of the sampling pipe, in order to solve the problem, a scheme of knocking the backrest pipe by using a hanging chain for deashing appears in the prior art, for example, Chinese patent CN201259506Y discloses the primary wind speed measuring device of the pulverized coal fired boiler, but in the scheme, a sleeve pipe made of ceramic materials is sleeved outside the backrest pipe, when the hanging chain knocks the backrest pipe, the sleeve pipe is easy to damage and break, particularly when the primary wind pressure changes suddenly, the condition is more common, and the service life of the wind speed measuring device is shorter.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide the coal-fired boiler powder pipe wind speed measuring device which is convenient to overhaul, wear-resistant, capable of automatically cleaning accumulated coal powder, not easy to block and long in service life.
In order to achieve the above object, the present invention provides a device for measuring the wind speed of a powder pipe of a coal-fired boiler, comprising:
the sampling tube is connected to a flange connector of the coal-fired boiler powder tube through a flange plate, the upper end part of the sampling tube vertically extends upwards and is connected with an end socket, and the lower end part of the sampling tube is vertically inserted into the powder tube;
the pressure transmission pipe is connected to the upper end part of the sampling pipe and extends downwards;
the two end parts of the pressure guide pipe are respectively communicated with the pressure transmission pipe and the transmitter;
the utility model discloses a sampling tube, including the sampling tube, the lower tip cover of sampling tube is equipped with wear-resisting sleeve pipe, be equipped with in the sampling tube and prevent stifled pendulum, prevent stifled pendulum includes the cycloid and connects the plummet of the lower tip of cycloid, the upper end of cycloid is passed through the snap ring and is fixed in the sampling tube, the plummet is located the bottom open-ended below of sampling tube, the plummet is in swing under the effect of a breeze in the powder pipe, drives the cycloid is scraped the inner wall of sampling tube, in order to clear up the buggy that gathers on the inner wall.
Preferably, the wear-resistant sleeve comprises a ceramic sleeve or a silicon carbide composite tube, and the thickness of the wear-resistant sleeve is 20% -30% of the outer diameter of the sampling tube.
Preferably, the snap ring is located above the pressure transfer tube.
Preferably, the upper end portion of the cycloid curve is located at the center of the sampling tube.
Preferably, the included angle between the axial lead of the pressure transmission pipe and the axial lead of the sampling pipe is 30-45 degrees.
Further preferably, a throttle orifice plate is arranged at the joint of the pressure transmission pipe and the sampling pipe, and a detachable ash removal nut is arranged at the lower end part of the pressure transmission pipe.
Further preferably, the pressure transmission pipe is vertically connected to the middle of the pressure transmission pipe and is located above the pressure transmission pipe.
Preferably, a back flushing pipe communicated with the sampling pipe is arranged in the center of the end socket.
Further preferably, a heating coil is wound on the upper end portion of the sampling tube and the pressure guiding tube.
Further preferably, the upper end of the sampling tube is connected with a fixing plate, and the pressure guide tube, the transmitter, and a controller and a power supply which are electrically connected with the heating coil are all arranged on the fixing plate.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model provides a coal-fired boiler powder pipe wind speed measuring device, which comprises a sampling pipe connected on a coal-fired boiler powder pipe flange interface through a flange plate, a pressure transmission pipe connected on the upper end part of the sampling pipe and extending downwards, and a pressure guide pipe with two end parts respectively communicated with the pressure transmission pipe and a transmitter, wherein the upper end part of the sampling pipe extends upwards and vertically and is connected with an end socket, and the lower end part is inserted in the powder pipe vertically, the proposal abandons welding connection and is convenient to maintain, a wear-resistant sleeve pipe is sleeved on the lower end part of the sampling pipe, so the sampling pipe is more wear-resistant, the upper end part of a cycloid is fixed in the sampling pipe through a snap ring, so that a plumb is positioned below an opening at the bottom of the sampling pipe, primary air in the powder pipe can be used for driving the plumb to swing, so that the cycloid scratches the inner wall of the sampling pipe to clean coal dust accumulated on the inner wall, therefore, automatic cleaning is realized, blockage is not easy to occur, chain hanging and knocking are replaced by cycloid scraping, the sampling tube and the wear-resistant sleeve cannot be damaged, and the service life is long.
Drawings
FIG. 1 is a schematic front view, partially in section, of a preferred embodiment of the present invention.
Fig. 2 is a schematic right-hand view of fig. 1, with heating coils and the like hidden.
Wherein: 10. a sampling tube; 10a, a full-pressure sampling tube; 10b, a static pressure sampling tube; 11. a flange plate; 12. a wear-resistant sleeve; 13. the pendulum bob is prevented from being blocked; 131. a cycloid; 132. a plumb bob; 14. a snap ring; 15. sealing the end; 151. a blowback pipe; 20. a powder tube; 21. a flange interface; 30. a pressure transmitting pipe; 31. a restriction orifice plate; 32. ash removing nuts; 40. a pressure guide pipe; 50. a heating coil; 60. a fixing plate; 61. a transmitter; 62. a controller; 63. a power source.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be clearly and clearly defined.
As shown in FIG. 1, the utility model provides a coal-fired boiler powder pipe wind speed measuring device, comprising: the sampling tube 10, the pressure transmission tube 30 and the pressure guide tube 40, wherein the middle part of the sampling tube 10 is connected with a flange plate 11, the sampling tube 10 is connected to a flange interface 21 of a coal-fired boiler powder tube 20 through the flange plate 11, a welding connection mode is abandoned, the maintenance is convenient, the upper end part of the sampling tube 10 extends upwards vertically and is connected with an end socket 15, a back flushing tube 151 communicated with the sampling tube 10 is arranged at the center of the end socket 15, the lower end part of the sampling tube 10 is inserted downwards vertically in the powder tube 20, the sampling tube 10 is divided into a full-pressure sampling tube 10a and a static-pressure sampling tube 10b, the full-pressure sampling tube 10a and the static-pressure sampling tube 10b are sequentially distributed along the flow direction of primary air in the powder tube 20 and are connected back to back, and a back-to-back structure is formed; two pressure transmission pipes 30 are respectively connected with the upper end parts of the full-pressure sampling pipe 10a and the static-pressure sampling pipe 10b and extend downwards; two pressure guide pipes 40 are arranged in one-to-one correspondence with the two pressure transmission pipes 30, two end parts of each pressure guide pipe 40 are respectively communicated with the pressure transmission pipe 30 and the transmitter 61, so that the total pressure in the total pressure sampling pipe 10a and the static pressure in the static pressure sampling pipe 10b are transmitted to the transmitter 61, and the transmitter 61 calculates the wind speed value in the powder pipe 20 according to the difference value between the total pressure and the static pressure.
In this embodiment, a wear-resistant sleeve 12 is sleeved on the lower end of the sampling tube 10, the wear-resistant sleeve 12 is a ceramic sleeve or a silicon carbide composite tube to enhance wear resistance, an anti-blocking pendulum 13 is arranged in the sampling tube 10, the anti-blocking pendulum 13 includes a cycloid 131 and a plumb bob 132 connected to the lower end of the cycloid 131, the cycloid 131 is a slender nylon thread, has smooth surface and high strength, and has certain elasticity, such as a fishing line, the upper end of the cycloid 131 is fixed in the sampling tube 10 through a snap ring 14 located above a pressure transmission tube 30, specifically, the upper end of the cycloid 131 is located at the center of the sampling tube 10, and the plumb bob 132 is located below the bottom opening of the sampling tube 10, which can not only utilize primary air in the powder tube 20 to drive the plumb bob 132 to swing, so that the cycloid 132 scratches the inner wall of the sampling tube 10 to clean up the coal powder accumulated on the inner wall, thereby realizing automatic cleaning and being not easy to block, and can replace the chaining knocking by the scraping of the cycloid 131 without damaging the sampling tube 10 and the wear-resistant sleeve 12, and has long service life.
The thickness of the wear-resistant sleeve 12 cannot be too thin or too thick, the wear-resistant effect is difficult to achieve due to the too thin thickness, and the flow area in the powder tube 20 is affected due to the too thick thickness, preferably, the thickness of the wear-resistant sleeve 12 is 20% -30% of the outer diameter of the sampling tube 10, in the embodiment, the outer diameter of the sampling tube 10 is 45mm, and the thickness of the wear-resistant sleeve 12 is 12 mm.
In the embodiment, the included angle between the axial lead of the pressure transmission pipe 30 and the axial lead of the sampling pipe 10 where the pressure transmission pipe is located is 30-45 degrees, the connection part of the pressure transmission pipe 30 and the sampling pipe 10 is provided with a throttle orifice plate 31, the lower end part of the pressure transmission pipe 30 is provided with a detachable ash removal nut 32, and the pressure transmission pipe 40 is vertically connected to the middle part of the pressure transmission pipe 30 and is located right above the pressure transmission pipe 30.
The benefit that sets up like this lies in, can utilize orifice plate 31 to realize certain filter effect, avoids the buggy to get into pressure transmission pipe 30, can also utilize the slope characteristic of pressure transmission pipe 30 to form the secondary to the buggy and subside, avoids it to get into pressure transmission pipe 40, and when the buggy piles up in pressure transmission pipe 30, can also utilize to dismantle deashing nut 32 and realize the clearance.
Because contain certain steam in the buggy, when outdoor temperature was lower winter, steam condensed easily behind getting into sampling tube 10, pressure transmission pipe 30, the pressure pipe 40, made the buggy caking easily after mixing with the buggy to cause the jam, for avoiding this problem, in this embodiment, the winding has heating coil 50 on the upper end of sampling tube 10, the pressure pipe 40.
The heating coil 50 has basically the same heat productivity on the full-pressure sampling tube 10a and the static-pressure sampling tube 10b and the heat productivity on the two pressure guide tubes 40, so that the temperature rise of the internal air is kept consistent, the change amplitudes of the full pressure and the static pressure are ensured to be the same, and the accuracy of measuring the wind speed value is not influenced.
In order to facilitate the fixing and to shorten the length of the pressure pipe 40 to the maximum extent, and further improve the accuracy of the measurement result, in the present embodiment, the upper end portion of the sampling pipe 10 is connected to a fixing plate 60, and the upper end portion of the pressure pipe 10, a transmitter 61, and a controller 62 and a power supply 63 electrically connected to the heating coil 50 are disposed on the fixing plate 60.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the utility model, and not to limit the scope of the utility model, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A coal-fired boiler powder pipe wind speed measuring device comprises:
the sampling tube is connected to a flange connector of the coal-fired boiler powder tube through a flange plate, the upper end part of the sampling tube vertically extends upwards and is connected with an end socket, and the lower end part of the sampling tube is vertically inserted into the powder tube;
the pressure transmission pipe is connected to the upper end part of the sampling pipe and extends downwards;
the two end parts of the pressure guide pipe are respectively communicated with the pressure transmission pipe and the transmitter;
the method is characterized in that:
the utility model discloses a sampling tube, including the sampling tube, the lower tip cover of sampling tube is equipped with wear-resisting sleeve pipe, be equipped with in the sampling tube and prevent stifled pendulum, prevent stifled pendulum includes the cycloid and connects the plummet of the lower tip of cycloid, the upper end of cycloid is passed through the snap ring and is fixed in the sampling tube, the plummet is located the bottom open-ended below of sampling tube, the plummet is in swing under the effect of a breeze in the powder pipe, drives the cycloid is scraped the inner wall of sampling tube, in order to clear up the buggy that gathers on the inner wall.
2. The coal-fired boiler powder pipe wind speed measuring device according to claim 1, characterized in that: the wear-resistant sleeve comprises a ceramic sleeve or a silicon carbide composite tube, and the thickness of the wear-resistant sleeve is 20% -30% of the outer diameter of the sampling tube.
3. The coal-fired boiler powder pipe wind speed measuring device according to claim 1, characterized in that: the snap ring is positioned above the pressure transmission pipe.
4. The coal-fired boiler powder pipe wind speed measuring device according to claim 1, characterized in that: the upper end of the cycloid is positioned in the center of the sampling tube.
5. The coal-fired boiler powder pipe wind speed measuring device of claim 1, characterized in that: the included angle between the axial lead of the pressure transmission pipe and the axial lead of the sampling pipe is 30-45 degrees.
6. The coal-fired boiler powder pipe wind speed measuring device of claim 5, characterized in that: the connection part of the pressure transmission pipe and the sampling pipe is provided with a throttle orifice plate, and the lower end part of the pressure transmission pipe is provided with a detachable ash removal nut.
7. The coal-fired boiler powder pipe wind speed measuring device according to claim 5, characterized in that: the pressure guide pipe is vertically connected to the middle of the pressure transmission pipe and is positioned above the pressure transmission pipe.
8. The coal-fired boiler powder pipe wind speed measuring device according to claim 1, characterized in that: and a back flushing pipe communicated with the sampling pipe is arranged in the center of the seal head.
9. The coal-fired boiler powder pipe wind speed measuring device according to any one of claims 1 to 8, characterized in that: and a heating coil is wound on the upper end part of the sampling tube and the pressure guide tube.
10. The coal-fired boiler powder pipe wind speed measuring device of claim 9, characterized in that: the upper end of sampling tube is connected with the fixed plate, the pressure pipe the changer and with controller and the power that the heating coil electricity is connected all set up on the fixed plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220505952.9U CN216816716U (en) | 2022-03-09 | 2022-03-09 | Coal fired boiler powder pipe wind speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220505952.9U CN216816716U (en) | 2022-03-09 | 2022-03-09 | Coal fired boiler powder pipe wind speed measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216816716U true CN216816716U (en) | 2022-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220505952.9U Active CN216816716U (en) | 2022-03-09 | 2022-03-09 | Coal fired boiler powder pipe wind speed measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216816716U (en) |
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2022
- 2022-03-09 CN CN202220505952.9U patent/CN216816716U/en active Active
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