An internal monitoring device for a coal feeder

Abstract

The utility model relates to the technical field of thermal power generation discloses a kind of inside monitoring device of coal feeder, and the shell of coal feeder is provided with connecting port, and the inside monitoring device of coal feeder includes shell, cover plate, mounting seat, monitoring camera, air jet nozzle and gas supply pipe, shell is connected with connecting port, the inner chamber of shell is communicated with the inner chamber of the shell of coal feeder, access hole is equipped on shell, cover plate is detachably installed at access hole, valve for closing connecting port is equipped on shell, monitoring camera and air jet nozzle are installed on cover plate by mounting seat, and gas supply pipe is connected with air jet nozzle by being threaded through cover plate;The coal drop port of coal feeder is located between the conveying belt of coal feeder and the inside monitoring device of coal feeder, and the inside monitoring device of coal feeder is directly opposite the conveying belt of coal feeder;The utility model is convenient for real-time remote clear viewing coal flow condition and coal drop port condition in the inside of coal feeder, and convenient for overhauling.

Description

Technical Field

[0001] This utility model relates to the field of thermal power generation technology, and in particular to an internal monitoring device for a coal feeder. Background Technology

[0002] In coal-fired power generation units, coal is transported from the coal mine to the coal bunker and distributed to several coal feeders. The coal feeders then distribute the coal to corresponding coal mills, where it is ground and blown into the furnace for combustion. The coal in the coal bunker is of uneven size and often contains foreign objects (iron blocks, stones). In winter, the ambient temperature is low, and large pieces of frozen coal are often present. These large pieces of frozen coal and foreign objects frequently get stuck on the coal feeder belts, causing the coal feeders to trip. In severe cases, this can damage the coal feeder belts and motors, leading to abnormal shutdowns of the unit.

[0003] Currently, there are two main methods for monitoring the coal flow inside the coal feeder. One method is to install a coal flow anomaly detection device inside the coal feeder. The working principle of the coal flow anomaly detection device is based on the linkage limit switch of the coal baffle plate. However, the environment inside the coal feeder is harsh, with coal dust and water vapor, which can cause the limit switch to malfunction, jam, and false alarms. This results in personnel receiving incorrect information and making incorrect adjustments, requiring production personnel to frequently go to the site to verify the actual situation. The second method is to install a transparent glass observation window on the coal feeder. However, this method has blind spots, unclear visibility, and requires time and effort for manual on-site observation. It also makes it impossible to observe the situation at the coal drop point of the coal feeder, creating blind spots. Utility Model Content

[0004] The purpose of this utility model is to provide an internal monitoring device for a coal feeder, which allows for real-time and remote clear viewing of the coal flow and coal drop conditions inside the feeder, and facilitates maintenance.

[0005] To achieve the above objectives, this utility model provides an internal monitoring device for a coal feeder. The coal feeder casing has a connection port. The internal monitoring device includes a housing, a cover plate, a mounting base, a monitoring camera, an air nozzle, and an air supply pipe. The housing is connected to the connection port, and the inner cavity of the housing communicates with the inner cavity of the coal feeder casing. The housing has an inspection port, and the cover plate is detachably installed at the inspection port. The housing has a valve for closing the connection port. The monitoring camera and the air nozzle are mounted on the cover plate via the mounting base. The air supply pipe passes through the cover plate and is connected to the air nozzle. The coal drop outlet of the coal feeder is located between the internal monitoring device and the conveyor belt of the coal feeder, and the internal monitoring device faces the conveyor belt of the coal feeder.

[0006] As a preferred embodiment of this utility model, the mounting base is provided with a lighting lamp, which is located near the monitoring camera.

[0007] As a preferred embodiment of this utility model, the mounting base is provided with a camera pan-tilt unit, the monitoring camera and the air nozzle are mounted on the camera pan-tilt unit, and the air supply pipe and the air nozzle are connected by a flexible air pipe.

[0008] As a preferred embodiment of this utility model, the camera pan-tilt unit is equipped with a wind-collecting cover.

[0009] As a preferred embodiment of this utility model, the wind-gathering cover includes a connecting ring plate connected to the camera pan-tilt unit and a wind-gathering tube connected to the connecting ring plate, wherein the diameter of the wind-gathering tube gradually decreases along the air jet direction of the nozzle.

[0010] As a preferred embodiment of this utility model, the cover plate is provided with a sealing strip, the cover plate is installed on the housing by bolts, and the sealing strip is sandwiched between the cover plate and the housing.

[0011] As a preferred embodiment of this utility model, the valve is a slide gate valve.

[0012] As a preferred embodiment of this utility model, the inner wall of the housing is provided with a sealing strip around its perimeter that seals with the slide valve.

[0013] As a preferred embodiment of this utility model, the surveillance camera is a zoom camera.

[0014] As a preferred embodiment of this utility model, the coal feeder has an observation window on its casing.

[0015] Compared with the prior art, the beneficial effects of the internal monitoring device for a coal feeder according to this embodiment of the utility model are as follows:

[0016] This utility model can be easily installed on existing coal feeders. A monitoring camera can simultaneously monitor the real-time situation inside the coal feeder and at the coal inlet. The air nozzles continuously spray gas to prevent coal dust and moisture from adhering to the camera, ensuring good image quality. This allows for convenient, real-time, and clear remote observation of the coal flow and coal inlet conditions inside the coal feeder. If any abnormalities are detected, staff can make timely adjustments. When the internal monitoring device needs maintenance, the cover plate can be removed, and the mounting base, monitoring camera, air nozzles, and air supply pipe can be taken out of the housing as a whole. Then, the valve can be closed to seal the connection, preventing coal dust from being blown out of the coal feeder, thus avoiding waste and air pollution. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0018] Fig. 1A schematic diagram of the internal monitoring device for the coal feeder provided by this utility model on the coal feeder.

[0019] Fig. 2 A schematic diagram of the structure of an internal monitoring device for a coal feeder provided by this utility model;

[0020] In the figure, 1 is the housing; 11 is the cover plate; 12 is the sealing strip; 13 is the mounting base; 2 is the monitoring camera; 3 is the air nozzle; 31 is the air supply pipe; 4 is the valve; 5 is the lighting lamp; 6 is the camera pan-tilt head; 7 is the air shroud; 71 is the connecting ring plate; 72 is the air duct; 8 is the coal feeder; 81 is the machine housing; 82 is the connection port; 83 is the coal drop port; and 84 is the conveyor belt. Detailed Implementation

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] like Figs. 1-2 As shown in the preferred embodiment of this utility model, an internal monitoring device for a coal feeder is provided. The housing 81 of the coal feeder 8 has a connection port 82. The internal monitoring device includes a housing 1, a cover plate 11, a mounting base 13, a monitoring camera 2, an air nozzle 3, and an air supply pipe 31. The housing 1 is connected to the connection port 82, and the inner cavity of the housing 1 communicates with the inner cavity of the housing 81 of the coal feeder 8. The housing 1 has an inspection port, and the cover plate 11 is detachably installed at the inspection port. The housing 1 has a valve for closing the connection port 82. 4. The monitoring camera 2 and the air nozzle 3 are mounted on the cover plate 11 through the mounting base 13. The air supply pipe 31 passes through the cover plate 11 and is connected to the air nozzle 3. An external compressed air source provides compressed air to the air supply pipe 31. The air supply pipe 31 and the cover plate 11 are sealed to ensure good sealing performance of the housing 1. The coal drop port 83 (entering the coal mill) of the coal feeder 8 is located between the internal monitoring device of the coal feeder 8 and the conveyor belt 84 of the coal feeder 8, and the internal monitoring device of the coal feeder 8 is directly facing the conveyor belt 84 of the coal feeder 8.

[0024] This utility model can be easily installed on an existing coal feeder 8. The monitoring camera 2 can simultaneously monitor the real-time situation inside the coal feeder 8 and the coal drop outlet 83. The air nozzle 3 can continuously spray gas to prevent coal dust and moisture from adhering to the monitoring camera 2, ensuring good image quality. It is convenient to remotely observe the coal flow inside the coal feeder 8 and the situation at the coal drop outlet 83 in real time. When an abnormality is detected, the staff can make corresponding adjustments in time to avoid accidents such as equipment damage and abnormal shutdown of the unit. When the monitoring device inside the coal feeder 8 needs maintenance, after removing the cover plate 11, the mounting base 13, monitoring camera 2, air nozzle 3 and air supply pipe 31 can be taken out of the housing 1 as a whole. Then, the valve 4 is closed to seal the connection port 82, preventing coal dust inside the coal feeder 8 from being blown out and causing waste and air pollution.

[0025] For example, the mounting base 13 is provided with a lighting lamp 5, which is close to the monitoring camera 2. There may be insufficient light inside the coal feeder 8. The light from the lighting lamp 5 serves as a supplementary light during shooting, ensuring that the monitoring camera 2 can capture clear and appropriately bright images.

[0026] For example, the mounting base 13 is equipped with a camera pan-tilt unit 6. In this embodiment, the monitoring camera 2 is a zoom camera. The monitoring camera 2 and the air nozzle 3 are mounted on the camera pan-tilt unit 6, with the air nozzle 3 close to the monitoring camera 2. The camera pan-tilt unit 6 can adjust the horizontal and vertical angles of the monitoring camera 2 and the air nozzle 3. The main controller is electrically connected to the camera pan-tilt unit 6 and the monitoring camera 2 via a data transmission line. By adjusting the focal length and angle of the monitoring camera 2, the real-time image inside the coal feeder 8 and at the coal inlet 83 can be clearly viewed, reducing blind spots. The air supply pipe 31 is connected to the air nozzle 3 via a flexible air pipe. The camera pan-tilt unit 6 is a commercially available structure and will not be described in detail here.

[0027] For example, the camera pan-tilt unit 6 is equipped with a concentrator 7, which allows the airflow from the nozzle 3 to be concentrated in the area of ​​the monitoring camera 2, enhancing the blowing force, reducing airflow waste, preventing coal dust from adhering to the lens of the monitoring camera 2, and ensuring the clarity of the lens. Specifically, the concentrator 7 includes a connecting ring plate 71 connected to the camera pan-tilt unit 6 and a concentrator duct 72 connected to the connecting ring plate 71. The diameter of the concentrator duct 72 gradually decreases along the airflow direction of the nozzle 3 to prevent interference between the concentrator 7 and the monitoring camera 2.

[0028] To further improve the sealing between the cover plate 11 and the housing 1, a sealing strip is provided on the cover plate 11. The cover plate 11 is installed on the housing 1 by bolts, which facilitates the installation and removal of the cover plate 11 on the housing 1. The sealing strip is sandwiched between the cover plate 11 and the housing 1.

[0029] In this embodiment, the valve 4 is a slide gate valve 4. After removing the cover plate 11, it can quickly seal the connection port 82 of the housing 81 of the coal feeder 8, which facilitates the maintenance of components such as the mounting base 13, monitoring camera 2, air nozzle 3 and air supply pipe 31.

[0030] Furthermore, the inner wall of the housing 1 is provided with sealing strips 12 that seal with the slide valve 4. When the slide valve 4 is closed, the four sides of the slide valve 4 cooperate with the sealing strips 12 on the inner wall of the housing 1, ensuring a good sealing effect of the slide valve 4.

[0031] For example, the housing 81 of the coal feeder 8 is provided with an observation window, allowing staff to observe the internal coal flow in real time next to the coal feeder 8.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An internal monitoring device for a coal feeder, characterized in that, The coal feeder has a connection port on its casing. The internal monitoring device of the coal feeder includes a casing, a cover plate, a mounting base, a monitoring camera, an air nozzle, and an air supply pipe. The casing is connected to the connection port, and the inner cavity of the casing communicates with the inner cavity of the coal feeder casing. The casing has an inspection port, and the cover plate is detachably installed at the inspection port. The casing has a valve for closing the connection port. The monitoring camera and the air nozzle are mounted on the cover plate via the mounting base. The air supply pipe passes through the cover plate and is connected to the air nozzle. The coal drop outlet of the coal feeder is located between the internal monitoring device of the coal feeder and the conveyor belt of the coal feeder, and the internal monitoring device of the coal feeder is directly opposite the conveyor belt of the coal feeder.

2. The internal monitoring device for the coal feeder as described in claim 1, characterized in that, The mounting base is equipped with a light, which is located near the surveillance camera.

3. The internal monitoring device for the coal feeder as described in claim 1, characterized in that, The mounting base is equipped with a camera pan-tilt unit, and the monitoring camera and the air nozzle are mounted on the camera pan-tilt unit. The air supply pipe and the air nozzle are connected by a flexible air pipe.

4. The internal monitoring device for the coal feeder as described in claim 3, characterized in that, The camera pan-tilt unit is equipped with a wind-collecting cover.

5. The internal monitoring device for the coal feeder as described in claim 4, characterized in that, The wind-gathering cover includes a connecting ring plate connected to the camera pan-tilt unit and a wind-gathering tube connected to the connecting ring plate. The diameter of the wind-gathering tube gradually decreases along the air jet direction of the nozzle.

6. The internal monitoring device for the coal feeder as described in claim 1, characterized in that, The cover plate is provided with a sealing strip, and the cover plate is installed on the housing by bolts. The sealing strip is sandwiched between the cover plate and the housing.

7. The internal monitoring device for the coal feeder as described in claim 1, characterized in that, The valve is a slide gate valve.

8. The internal monitoring device for the coal feeder as described in claim 7, characterized in that, The inner wall of the housing is provided with sealing strips that are in sealing cooperation with the gate valve.

9. The internal monitoring device for a coal feeder as described in claim 1, characterized in that, The surveillance camera is a zoom camera.

10. The internal monitoring device for a coal feeder as described in claim 1, characterized in that, The coal feeder has an observation window on its casing.

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