CN217155676U - Thermal power pulverized coal furnace draught fan outlet pressure measuring device - Google Patents
Thermal power pulverized coal furnace draught fan outlet pressure measuring device Download PDFInfo
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- CN217155676U CN217155676U CN202122413739.3U CN202122413739U CN217155676U CN 217155676 U CN217155676 U CN 217155676U CN 202122413739 U CN202122413739 U CN 202122413739U CN 217155676 U CN217155676 U CN 217155676U
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- pulverized coal
- thermal power
- coal furnace
- measuring device
- pressure measuring
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Abstract
A thermal power pulverized coal furnace draught fan outlet pressure measuring device belongs to the technical field of thermal power generation. Including sampling tube (10) and install sampler (6) in sampling tube (10) one side, install pressure gauge (4), its characterized in that in the exit of sampler (6): two ports of the sampling tube (10) are respectively connected with a section of pipeline: the device comprises a first branch pipeline and a second branch pipeline, wherein the port of the first branch pipeline is connected with the outlet of a pulverized coal furnace draught fan, a screw lifter (7) is installed at the end part of the second branch pipeline, and a clearing component for clearing the interior of a sampling pipe (10) is installed at the end of a screw (8) in the screw lifter (7). In this thermal power pulverized coal furnace draught fan outlet pressure measuring device, through setting up the screw rod lift to install helical blade on the screw rod of screw rod lift, realized the clearance to the sampling tube through helical blade, avoided the sampling tube to take place to block up.
Description
Technical Field
A thermal power pulverized coal furnace draught fan outlet pressure measuring device belongs to the technical field of thermal power generation.
Background
At present, in a thermal power generation pulverized coal furnace, hearth pressure, flue gas pressure, coal mill pressure and primary and secondary air pressure are all important bases for normal operation of the boiler, and particularly, whether the outlet pressure of a draught fan is accurate or not is the stable operation of a power plant. The conventional anti-blocking sampler is generally adopted in a power plant, and the products have some effects on the anti-blocking sampling, but the effects are not very obvious, so that the blocking phenomenon happens occasionally.
The existing sampling device in the market at present has the following problems: the anti-blocking sampling device is subjected to back flushing, pressure distortion of the sampling device can be influenced while back flushing, and real data cannot be accurately reflected. Second, the operating mode is the malleation a bit on the scene, and high temperature system blocks up the back, must dismantle the maintenance to preventing stifled sample, and the maintenance of equipment maintenance personnel maintenance work load is big to in-process of maintenance, can cause certain danger like high temperature scald to maintenance personnel, inhale accidents such as poisonous flue gas, must change the maintenance after shutting down under the condition a bit, seriously influence measured data's authenticity, be unfavorable for system steady operation. The disassembly-free cleaning and maintenance of the anti-blocking sampling can not be realized. And thirdly, the on-site pressure sampler is positioned in the environments of high altitude and narrow space, and personnel are inconvenient to maintain daily, so that a large amount of labor can be caused when online ash removal is realized. Certain personal safety hidden dangers exist during maintenance.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: the shortcomings of the prior art are overcome, the screw rod lifter is arranged, the helical blade is arranged on the screw rod of the screw rod lifter, the sampling tube is cleaned through the helical blade, and the thermal power coal powder furnace draught fan outlet pressure measuring device for preventing the sampling tube from being blocked is avoided.
The utility model provides a technical scheme that its technical problem adopted is: this thermal power pulverized coal furnace draught fan outlet pressure measuring device, include the sampling tube and install the sampler in sampling tube one side, install pressure gauge, its characterized in that in the exit of sampler: two ports of the sampling tube are respectively connected with a section of pipeline: the device comprises a first branch pipeline and a second branch pipeline, wherein the port of the first branch pipeline is connected with an outlet of a pulverized coal furnace draught fan, a screw lifter is installed at the end part of the second branch pipeline, and a cleaning component for cleaning the interior of a sampling pipe is installed at the end of a screw in the screw lifter.
Preferably, both ends of the sampling tube are connected with the first branch pipeline and the second branch pipeline through flanges.
Preferably, a shaft seal is provided in the second branch line.
Preferably, the removing member is a helical blade.
Preferably, the helical blade has a length greater than the length of the sampling tube.
Preferably, the inlet pipe is connected with the outlet of the sampler after being connected with the first valve and the second valve in series, a measuring branch is arranged on the inlet pipe, and the pressure gauge is arranged in the measuring branch.
Preferably, the measuring branch is located between the second valve and the outlet of the sampler.
Preferably, a third valve is installed in the measuring branch.
Compared with the prior art, the utility model discloses the beneficial effect who has is:
in this thermal power pulverized coal furnace draught fan outlet pressure measuring device, through setting up the screw rod lift to install helical blade on the screw rod of screw rod lift, realized the clearance to the sampling tube through helical blade, avoided the sampling tube to take place to block up.
Through according to the third valve in the measurement branch road at pressure gauge place, the controller control third valve is closed when carrying out the blowback, and compressed air can't get into the air intake of pressure gauge, avoids causing the damage to the pressure gauge.
Drawings
Fig. 1 is a schematic structural diagram of a thermal power generation pulverized coal furnace draught fan outlet pressure measuring device.
Wherein: 1. the device comprises an air inlet pipe 2, a first valve 3, a second valve 4, a pressure gauge 5, a third valve 6, a sampler 7, a screw lifter 8, a screw 9, a shaft seal 10, a sampling pipe 11, a flange 12 and a helical blade.
Detailed Description
Fig. 1 is a preferred embodiment of the present invention, and the present invention will be further explained with reference to fig. 1.
As shown in FIG. 1, the sampling device comprises a sampling tube 10 and a sampler 6 mounted on the side of the sampling tube 10, wherein the inlet of the sampler 6 is communicated with the sampling tube 10, and the sampler 6 is realized by a common commercially available anti-blocking sampler.
The welding has flange 11 at the both ends of sampling tube 10, and sampling tube 10 is connected with one section pipeline respectively through flange 11: the device comprises a first branch pipeline and a second branch pipeline, wherein the port of the first branch pipeline is connected with the outlet of a pulverized coal furnace draught fan, a screw lifter 7 is installed at the end part of the second branch pipeline, and a shaft seal 9 is arranged in the second branch pipeline.
The screw lifter 7 is driven by a servo motor (not shown in the figure), a helical blade 12 is coaxially fixed at the port of the screw 8 in the screw lifter 7, and the screw 8 fixed with the helical blade 12 sequentially passes through a shaft seal 9 in the second branch pipeline, a sampling pipe 10 and the first branch pipeline and then extends to the port of the first branch pipeline. The axial length of the helical blade 12 is greater than the length of the coupon 10. Limit switches are respectively arranged at the front end and the rear end of the advancing screw rod 8, and the advancing position and the retreating position of the screw rod 8 are respectively detected.
Be provided with the intake pipe 1 that is used for introducing compressed air in one side of sampler 6, intake pipe 1 establishes ties first valve 2 in proper order, connect in the exit of sampler 6 upper end behind the second valve 3, still be provided with the measurement pipeline with intake pipe 1 intercommunication in intake pipe 1, measurement pipeline one end sets up between second valve 3 and sampler 6, pressure gauge 4 is installed to the other end, still install third valve 5 on this measurement pipeline.
The first valve 2, the second valve 3 and the third valve 5 are connected with a controller and are switched on and off by the controller, the servo motor for driving the screw rod lifter 7 to work is also connected with the controller, and the controller controls the forward and reverse rotation of the servo motor. The controller can be realized by a singlechip which is common in the field.
The coil of time relay is parallelly connected at the power both ends of servo motor forward rotation power supply circuit, and the normally closed contact of this time relay establishes ties in servo motor forward rotation's power supply circuit, and when needs servo motor forward rotation, the power supply of time relay coil switches on, and when reaching predetermined time, the action of time relay cuts off servo motor forward rotation's power supply circuit, when avoiding above-mentioned limit switch to become invalid, and screw rod 8 advancing distance excessively causes the damage.
Similarly, the coil of another time relay is also connected in parallel at the power supply both ends of the servo motor reverse rotation power supply loop, and the normally closed contact of this time relay is established ties in servo motor reverse rotation's power supply loop, and when needs servo motor reverse rotation, the power supply switch-on of time relay coil, when reaching predetermined time after, the time relay action cuts off servo motor reverse rotation's power supply loop, when avoiding above-mentioned limit switch to become invalid, screw rod 8 backset distance excessively causes the damage.
The normally closed contact of the intermediate relay for realizing forward rotation of the servo motor is simultaneously connected in series in the reverse rotation power supply loop of the servo motor, and the normally closed contact of the intermediate relay for realizing reverse rotation of the servo motor is simultaneously connected in series in the forward rotation power supply loop of the servo motor, so that the interlocking of the forward rotation power supply loop and the reverse rotation power supply loop of the servo motor is realized, and the simultaneous connection of the forward rotation power supply loop and the reverse rotation power supply loop of the servo motor is avoided, and the damage of the servo motor is caused.
The specific working process and working principle are as follows:
under normal conditions, the pressure of buggy stove draught fan gets into in sampler 6 through sampling tube 10 to export through the sampler 6 top, the first valve of controller control 2, second valve 3 close, control third valve 5 and open, measure the pressure value of buggy stove draught fan through pressure gauge 4.
When needs carry out the blowback to sampler 6, controller control first valve 2, second valve 3 open, and the compressed air who gets into by intake pipe 1 carries out the blowback to sampler 6 in getting into sampler 6 through intake pipe 1, and the controller control third valve 5 closes simultaneously, and compressed air can't get into the air intake of pressure gauge 4, avoids causing the damage to pressure gauge 4.
When the sample pipeline is blockked up, through controller control servo motor forward rotation, servo motor drives screw rod riser 7 work, and screw rod 8 drives helical blade 12 and gos forward, at the in-process through sampling tube 10, clears up the inside of sampling tube 10, and after the limit switch who contacts the direction of advance or reaching time relay's the time of predetermineeing, servo motor stops corotation. Then the controller controls the servo motor to rotate reversely, the screw 8 drives the spiral blade 12 to return, when the screw contacts a limit switch in the return direction or reaches the preset time of the time relay, the servo motor stops rotating forwardly, and the screw 8 resets.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a thermal power pulverized coal furnace draught fan outlet pressure measuring device, includes sampling tube (10) and installs sampler (6) in sampling tube (10) one side, installs pressure gauge (4), its characterized in that in the exit of sampler (6): two ports of the sampling tube (10) are respectively connected with a section of pipeline: the device comprises a first branch pipeline and a second branch pipeline, wherein the port of the first branch pipeline is connected with the outlet of a pulverized coal furnace draught fan, a screw lifter (7) is installed at the end part of the second branch pipeline, and a cleaning part for cleaning the inside of a sampling pipe (10) is installed at the end of a screw (8) in the screw lifter (7).
2. The thermal power pulverized coal furnace induced draft fan outlet pressure measuring device of claim 1, characterized in that: two ends of the sampling tube (10) are connected with the first branch pipeline and the second branch pipeline through flanges (11).
3. The thermal power generation pulverized coal furnace draught fan outlet pressure measuring device of claim 1 or 2, characterized in that: and a shaft seal (9) is arranged in the second branch pipeline.
4. The thermal power pulverized coal furnace induced draft fan outlet pressure measuring device of claim 1, characterized in that: the removing component is a helical blade (12).
5. The thermal power generation pulverized coal furnace induced draft fan outlet pressure measuring device of claim 4, characterized in that: the length of the helical blade (12) is greater than the length of the sampling tube (10).
6. The thermal power pulverized coal furnace induced draft fan outlet pressure measuring device of claim 1, characterized in that: intake pipe (1) is connected behind first valve (2), second valve (3) of establishing ties the exit of sampler (6) is provided with the measurement branch road on intake pipe (1), pressure gauge (4) are installed in measuring the branch road.
7. The thermal power generation pulverized coal furnace induced draft fan outlet pressure measuring device of claim 6, characterized in that: the measuring branch is located between the second valve (3) and the outlet of the sampler (6).
8. The thermal power generation pulverized coal furnace draught fan outlet pressure measuring device of claim 6 or 7, characterized in that: a third valve (5) is arranged in the measuring branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122413739.3U CN217155676U (en) | 2021-10-08 | 2021-10-08 | Thermal power pulverized coal furnace draught fan outlet pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122413739.3U CN217155676U (en) | 2021-10-08 | 2021-10-08 | Thermal power pulverized coal furnace draught fan outlet pressure measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217155676U true CN217155676U (en) | 2022-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122413739.3U Active CN217155676U (en) | 2021-10-08 | 2021-10-08 | Thermal power pulverized coal furnace draught fan outlet pressure measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217155676U (en) |
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2021
- 2021-10-08 CN CN202122413739.3U patent/CN217155676U/en active Active
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