Power plant boiler wind pressure pipeline anti-blocking communicating device

Abstract

The utility model provides a power plant boiler air pressure pipeline anti-blocking communicating and throwing device which comprises an air pressure main pipeline, an air pressure branch pipeline, a high-pressure air source, a hollow communicating and throwing pipe, a butt joint pipe and a ball valve. The air pressure main pipeline is communicated with a boiler hearth, one end of the air pressure branch pipeline is communicated with the air pressure main pipeline, and the other end of the air pressure branch pipeline is connected with an air pressure transmitter; the high-pressure air source is fixedly connected with the air inlet end of the hollow feeding pipe through the conveying hose, the butt joint pipe, the ball valve and the air pressure main pipeline are sequentially connected in series and fixed together, and the butt joint position of the ball valve and the air pressure main pipeline is located on the upstream of the butt joint position of the air pressure branch pipeline and the air pressure main pipeline. And the air outlet end of the hollow through pipe is provided with a brushing assembly for assisting in cleaning the pipe wall of the air pressure main pipeline. By utilizing the switching device, dust or ash residues cannot be remained in the air pressure main pipeline when the air pressure main pipeline is closed, so that the accuracy of air pressure measurement can be effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of air pressure pipeline unblocking for boilers in power plants, in particular to an anti-blocking unblocking device for air pressure pipelines of boilers in power plants. Background Art

[0002] When the boiler equipment is in production and operation, it is necessary to monitor various data to ensure the safe and stable operation of the boiler. Among them, the measurement of various wind pressures is particularly important. The change of wind pressure can be used to adjust the boiler load, optimize combustion, and save energy and reduce consumption. During operation, due to external reasons such as wear, leaks may appear in the closed wind pressure pipeline, resulting in inaccurate wind pressure values, misleading the adjustment of operators, and in serious cases endangering the safe operation of the equipment. Therefore, it is particularly important to identify the leaks in time and eliminate the defects.

[0003] The outer end of a normal wind pressure pipeline is sealed by a nut, and the other end of the pipeline is connected to the boiler furnace at the boiler body end. The pressure transmitter is connected to the middle of the wind pressure pipeline. The change of wind pressure in the pipeline affects the wind pressure transmitter sensor and is converted into a corresponding value to be reflected at the monitoring end of the operator. If there is a leak in the wind pressure pipeline, the closed pipeline will leak, and the ash, slag and other tiny particles inside the boiler will be brought into the wind pressure pipeline to cause the pipeline to be blocked, making the wind pressure value abnormal. After the leak is dealt with and the wind pressure pipeline is restored, it is necessary to use steel bars to clear the blocked pipeline. When the steel bars are used to clear the pipeline, the pipeline is in an open state. After the steel bars are opened and the pipeline is withdrawn, the pipeline cannot be quickly closed. As a result, in the process of blocking the outer end of the pipeline, under the influence of the wind pressure inside the furnace, a small amount of dust or ash will always enter the wind pressure pipeline again, which makes it impossible to effectively ensure the monitoring accuracy of the wind pressure value. Utility Model Content

[0004] The utility model aims to provide a device for preventing and opening the wind pressure pipeline of a power plant boiler. By using the device, it can be ensured that when the wind pressure main pipeline is closed, no dust or ash will remain in the wind pressure main pipeline, thereby effectively ensuring the accuracy of wind pressure measurement.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a power plant boiler wind pressure pipeline anti-blocking and dunking device, including a wind pressure main pipeline, a wind pressure branch pipeline, a high-pressure gas source, a hollow dunking pipe, a butt pipe, and a ball valve. The wind pressure main pipeline is connected with the boiler furnace, one end of the wind pressure branch pipeline is connected with the wind pressure main pipeline, and the other end is connected with the wind pressure transmitter. The high-pressure gas source is fixedly connected with the air inlet end of the hollow dunking pipe through a conveying hose, the butt pipe, the ball valve and the wind pressure main pipeline are connected and fixed together in series in sequence, and the butt joint of the ball valve and the wind pressure main pipeline is located upstream of the butt joint of the wind pressure branch pipeline and the wind pressure main pipeline, and a cleaning brush component for auxiliary cleaning of the pipe wall of the wind pressure main pipeline is provided on the air outlet end of the hollow dunking pipe.

[0006] Preferably, the air outlet end of the hollow injection tube is conical.

[0007] Preferably, the inner diameter of the channel on the ball core of the ball valve, the inner diameter of the butt joint pipe and the inner diameter of the main air pressure pipe are the same.

[0008] Preferably, a transparent observation window is provided on the butt joint tube.

[0009] Furthermore, the cleaning and brushing assembly includes a plurality of elastic steel wires, and a circle of the elastic steel wires is arranged on the inclined conical side wall of the air outlet end of the hollow through-hole.

[0010] Furthermore, the outer end portion of the elastic steel wire is distributed in an inclined state toward the air inlet end of the hollow through-hole.

[0011] Furthermore, a plurality of flushing holes are arranged on the air inlet end of the hollow through-hole and are distributed at equal intervals along the circumferential direction thereof, and the high-pressure airflow flowing out of the flushing holes blows toward the outer end of the elastic steel wire.

[0012] Furthermore, a collodion ring is arranged on the air outlet end of the hollow through-throw pipe and is located behind the conical side wall thereof.

[0013] Furthermore, a guiding slope facing the elastic steel wire is arranged at the front of the collodion ring.

[0014] The beneficial effects of the utility model are as follows: the utility model has a simple structure and is easy to manufacture; when the air pressure main line is dredged by using the hollow ditch pipe, since there is always high-pressure airflow flowing out of the hollow ditch pipe, the dust or ash in the air pressure main line can be blown into the furnace by the blowing effect of the high-pressure airflow, thereby unblocking the air pressure line; further, under the action of the high-pressure airflow, the dust or ash in the boiler furnace cannot enter the air pressure main line, so in the process of closing the ball valve, the hollow ditch pipe is always blown into the air pressure main line, and then the ball valve is closed. During the cleaning process, it can also ensure that dust or ash in the boiler will not enter the wind pressure main line, thereby ensuring the quality of the wind pressure main line and ensuring the accurate collection of wind pressure on the wind pressure main line; the elastic steel wire can be used to clean the side wall of the wind pressure main line, thereby facilitating the removal of ash firmly attached to the side wall of the wind pressure main line. In the process of the ash being cleaned by the elastic steel wire, the flushing hole blows the ash synchronously, thereby improving the cleaning effect. Furthermore, the cotton ring can be used to wipe the fine dust on the side wall of the wind pressure main line, thereby further improving the quality of the wind pressure main line. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some preferred embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is an overall structural diagram of the utility model;

[0017] Figure 2 It is a longitudinal cross-sectional view of the connection between the butt pipe, ball valve and air pressure main pipe;

[0018] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0019] In the figure: 1 wind pressure main pipeline, 2 wind pressure branch pipeline, 3 hollow casting pipe, 31 elastic steel wire, 32 scouring hole, 33 rubber cotton ring, 331 guide slope, 4 butt pipe, 41 observation window, 5 ball valve, 51 valve core, 52 channel. DETAILED DESCRIPTION

[0020] The following will be combined with specific embodiments and attached Figure 1-3, the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the preferred embodiments of the utility model, not all of the embodiments. Those skilled in the art can make similar modifications without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0021] The utility model provides a device for preventing and opening the wind pressure pipeline of a power plant boiler (such as Figure 1 As shown), it includes an air pressure main line 1, an air pressure branch line 2, a high-pressure gas source, a hollow through-throw pipe 3, a butt-joint pipe 4, and a ball valve 5. The air pressure main line 1 is connected to the boiler furnace, one end of the air pressure branch line 2 is connected to the air pressure main line 1, and the other end is connected to the air pressure transmitter. The boiler furnace is connected and connected with the measuring interface of the air pressure transmitter through the air pressure main line 1 and the air pressure branch line 2, so as to realize the air pressure transmission to monitor the air pressure at the corresponding position in the furnace. The high-pressure gas source is fixedly connected to the air inlet end of the hollow through-throw pipe 3 through a conveying hose. The high-pressure gas source is used to provide a high-pressure airflow. In this specific embodiment, a high-pressure air pump existing in the existing market can be selected as the high-pressure gas source for specific implementation. The operator can By controlling the air source control switch on the high-pressure air pump, the high-pressure airflow in the hollow injection pipe 3 can be turned on and off. The docking pipe 4, the ball valve 5 and the air pressure main line 1 are connected and fixed together in series in sequence, and the docking point of the ball valve 5 and the air pressure main line 1 is located upstream of the docking point of the air pressure branch line 2 and the air pressure main line 1. The high-pressure airflow flowing out of the hollow injection pipe 3 is used to impact the inside of the air pressure main line 1, so that the injection of the air pressure main line 1 can be effectively achieved. A cleaning component for assisting in cleaning the wall of the air pressure main line 1 is provided on the air outlet end of the hollow injection pipe 3. Since the opening or closing operation of the ball valve 5 is rapid, the closing operation of the air pressure main line 1 can be quickly achieved, which is also conducive to ensuring the injection quality of the air pressure main line 1.

[0022] The operation process of using the utility model to carry out the unblocking of the wind pressure main line 1 is as follows: first, the high-pressure gas source is opened to realize the high-pressure airflow delivery of the hollow unblocking tube 3, and then, the air outlet end of the hollow through-tube 3 is inserted into the docking tube 4. After the insertion is completed, the ball valve 5 is fully opened. After the ball valve 5 is fully opened, the hollow unblocking tube 3 is inserted into the wind pressure main line 1, and then, the hollow unblocking tube 3 is repeatedly pulled in the wind pressure main line 1. In the process of repeatedly pulling the hollow unblocking tube 3, the hollow unblocking tube 3 and the high-pressure airflow are used to push and impact dust and ash, thereby realizing the unblocking of the wind pressure main line 1. After the unblocking is completed, the entrance end of the hollow through-tube 3 is pulled into the docking tube 4, and then, the ball valve 5 is quickly closed. After the ball valve 5 is closed, the high-pressure gas source is closed, and then the whole unblocking process is completed. During the process of closing the ball valve 5, since the hollow delivery pipe 3 is always in a high-pressure airflow conveying state, it can effectively prevent dust or ash in the furnace from entering the wind pressure main line 1 again, thereby ensuring the delivery quality of the wind pressure main line 1 after the ball valve 5 is closed, and then helping to effectively ensure the accuracy of wind pressure monitoring of the wind pressure main line 1.

[0023] In actual applications, in order to facilitate the smooth insertion of the hollow injection tube 3 into the butt joint tube 4, the channel 52 of the ball valve 5 and the wind pressure main line 1, the air outlet end of the hollow injection tube 3 is made conical. Furthermore, in order to facilitate the smooth sliding of the hollow injection tube 3 in the butt joint tube 4, the channel 52 and the wind pressure main line 1, the inner diameter of the channel 52 on the ball core 51 of the ball valve 5, the inner diameter of the butt joint tube 4 and the inner diameter of the wind pressure main line 1 are made the same.

[0024] When closing the ball valve 5, in order to facilitate the smooth observation of the position of the air outlet end of the hollow drop tube 3 and ensure that the air outlet end of the hollow drop tube 3 is located outside the ball core 51, a transparent observation window 41 is provided on the docking tube 4. When the air outlet end of the hollow drop tube 3 is observed through the transparent observation window 41, it can be ensured that the air outlet end of the hollow drop tube 3 has completely separated from the ball core 51, so that the closing operation of the ball valve 5 can be performed.

[0025] On the basis of the above embodiment, the specific implementation of the cleaning and brushing assembly is as follows: the cleaning and brushing assembly includes a plurality of elastic steel wires 31, and a circle of the elastic steel wires 31 is arranged on the inclined conical side wall of the air outlet end of the hollow casting pipe 3. When the elastic steel wires 31 reciprocate in the wind pressure main pipe 1, the outer end of the elastic steel wires 31 can clean the side wall of the wind pressure main pipe 1, thereby effectively removing the upper ash firmly attached to the side wall of the wind pressure main pipe 1, thereby improving the casting effect, and further In order to facilitate the elastic steel wire 31 to smoothly enter the docking pipe 4, the channel 52 and the wind pressure main line 1, the outer end of the elastic steel wire 31 is distributed in an inclined state toward the air inlet end of the hollow through-throw pipe 3. Furthermore, during the cleaning process of the elastic steel wire 31, in order to blow the ash in time, a plurality of flushing holes 32 are provided on the air inlet end of the hollow through-throw pipe 3 at equal intervals along its circumferential direction, and the high-pressure airflow flowing out of the flushing hole 32 blows toward the outer end of the elastic steel wire 31.

[0026] During the casting process of the hollow casting tube 3, in order to facilitate the synchronous wiping of the side wall of the wind pressure main line 1, a cotton wool ring 33 is provided at the air outlet end of the hollow casting tube 3 and located behind its conical side wall. In order to facilitate the cotton wool ring 33 to smoothly enter the docking tube 4, the channel 52 and the wind pressure main line 1, a guide slope 331 facing the elastic steel wire 31 is provided at the front of the cotton wool ring 33.

[0027] In the present utility model, "upper", "lower", "front", "back", "left" and "right" are relative positions used to conveniently describe positional relationships, and therefore cannot be understood as absolute positions to limit the scope of protection.

[0028] Except for the technical features described in the specification, all other technical features are known technologies to those skilled in the art.

[0029] The above description in combination with the accompanying drawings has detailed the preferred implementation modes and embodiments of the utility model, but the utility model is not limited to the above implementation modes and embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the concept of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A device for preventing and blocking wind pressure pipelines of power plant boilers, comprising a wind pressure main pipeline and a wind pressure branch pipeline, wherein the wind pressure main pipeline is connected to the boiler furnace, one end of the wind pressure branch pipeline is connected to the wind pressure main pipeline, and the other end is connected to the wind pressure transmitter, wherein: The air injection device also includes a high-pressure gas source, a hollow air injection pipe, a butt joint pipe, and a ball valve. The high-pressure gas source is fixedly connected to the air inlet end of the hollow air injection pipe through a delivery hose. The butt joint pipe, the ball valve, and the air pressure main line are connected in series and fixed together in sequence. The butt joint between the ball valve and the air pressure main line is located upstream of the butt joint between the air pressure branch line and the air pressure main line. A cleaning brush component for assisting in cleaning the wall of the air pressure main line is provided on the air outlet end of the hollow air injection pipe.

2. The anti-blocking and unblocking device for the wind pressure pipeline of a power plant boiler according to claim 1 is characterized in that: The air outlet end of the hollow through-throw pipe is tapered.

3. The anti-blocking and unblocking device for the wind pressure pipeline of a power plant boiler according to claim 2 is characterized in that: The inner diameter of the passage on the ball core of the ball valve, the inner diameter of the butt joint pipe and the inner diameter of the main air pressure pipe are the same.

4. The anti-blocking and unblocking device for wind pressure pipeline of power plant boiler according to claim 3 is characterized in that: A transparent observation window is arranged on the butt joint pipe.

5. The anti-blocking and unblocking device for wind pressure pipeline of power plant boiler according to claim 3 is characterized in that: The cleaning and brushing assembly comprises a plurality of elastic steel wires, and a circle of the elastic steel wires is arranged on the inclined conical side wall of the air outlet end of the hollow through-throw pipe.

6. The anti-blocking and unblocking device for wind pressure pipeline of power plant boiler according to claim 5 is characterized in that: The outer end portion of the elastic steel wire is distributed in an inclined state toward the air inlet end of the hollow through-throw pipe.

7. The anti-blocking and unblocking device for the wind pressure pipeline of a power plant boiler according to claim 6 is characterized in that The air inlet end of the hollow through-hole is provided with a plurality of flushing holes which are distributed at equal intervals along its circumferential direction, and the high-pressure airflow flowing out of the flushing holes blows toward the outer end of the elastic steel wire.

8. The anti-blocking and unblocking device for wind pressure pipeline of power plant boiler according to claim 7 is characterized in that: A collodion ring is arranged on the air outlet end of the hollow through-throw pipe and is located behind the conical side wall thereof.

9. The anti-blocking and unblocking device for wind pressure pipeline of power plant boiler according to claim 8 is characterized in that: A guide slope facing the elastic steel wire is arranged at the front of the collodion ring.

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