Anti-blocking feed hopper for coal feeder

Abstract

The utility model relates to an anti-blocking feeding hopper for a coal feeder. The device comprises a feeding hopper, an annular air pipe, air inlet nozzles, a main air pipe, a valve and an air heater, the feeding hopper is fixedly installed at the feeding end of the coal feeder, the annular air pipe is installed at the bottom of the feeding hopper, the air inlet nozzles are evenly arranged on the annular air pipe and extend into the hopper after penetrating through the feeding hopper, one end of the main air pipe is communicated with the annular air pipe, and the other end of the main air pipe is communicated with the valve. The other end of the main air pipe is connected with an air heater, and a valve is further installed on the main air pipe. According to the scheme, the feeding hopper can be heated through hot air, the temperature of a coal mine in the feeding hopper is increased, the freezing and sticking phenomenon is avoided, and therefore the smoothness of the feeding hopper is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of coal feeder feeding devices, and particularly relates to an anti-blocking feeding hopper for a coal feeder. Background Art

[0002] The main function of a coal feeder is to adjust the coal feeding amount according to the needs of a coal mill or boiler load and evenly feed raw coal into the coal mill. To facilitate feeding coal into the coal feeder, a large feeding hopper is usually installed at the feeding end of the coal feeder, and coal is transported to the feeding hopper through a conveyor belt. The feeding hopper is usually made of metal.

[0003] Due to the microporous structure in coal mines, it is easy to absorb moisture during the processes of mining, transportation, and storage, resulting in a relatively high humidity of the coal in coal mines. In a cold environment, the temperature of the feeding hopper is relatively low. When wet coal is directly added to the feeding hopper, in a low-temperature environment, the moisture in the coal is likely to condense to form ice, increasing the adhesion force between the coal and the metal plate. This phenomenon is called freezing adhesion. Especially small coal lumps are more easily affected by the freezing adhesion effect. If not processed in time, under the influence of the freezing adhesion effect, it is easy to cause the feeding hopper to become blocked. Utility Model Content

[0004] To solve or partially solve the problems existing in the related technologies, this application provides an anti-blocking feeding hopper for a coal feeder. This device can heat the feeding hopper through hot air, increase the temperature of the coal in the feeding hopper, avoid the occurrence of freezing adhesion phenomenon, and thus ensure the smoothness of the feeding hopper.

[0005] This application provides an anti-blocking feeding hopper for a coal feeder, including a feeding hopper, an annular air duct, air inlet nozzles, a main air duct, a valve, and a hot air blower. The feeding hopper is fixedly installed at the feeding end of the coal feeder, and an annular air duct is installed at the bottom of the feeding hopper. Air inlet nozzles are evenly arranged on the annular air duct. After penetrating the feeding hopper, the air inlet nozzles extend into the hopper. One end of the main air duct is connected to the annular air duct, and the other end is connected to the hot air blower. A valve is also installed on the main air duct.

[0006] Optionally, in some embodiments, a lining plate is installed on the inner wall of the feeding hopper, and the lining plate is made of wear-resistant non-metallic material.

[0007] Optionally, in some embodiments, a support is arranged outside the feeding hopper, and an air cannon is fixedly installed on the support. The firing port of the air cannon penetrates the side wall and the lining plate of the feeding hopper and then extends into the hopper.

[0008] Optionally, in some embodiments, a temperature sensor is installed on the main air duct.

[0009] Optionally, in some embodiments, both the main air duct and the annular air duct are wrapped with heat insulation materials.

[0010] The technical solution provided by this application may include the following beneficial effects:

[0011] In this application, hot air is supplied by a hot air blower, and the hot air is evenly sent to the bottom of the feed hopper through an annular air duct. As the hot air rises naturally, the coal in the feed hopper is heated, avoiding the phenomenon of freezing and sticking between the coal and the feed hopper, thus ensuring the smoothness of the feed hopper.

[0012] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By describing the exemplary embodiments of this application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of this application will become more obvious. Among them, in the exemplary embodiments of this application, the same reference numerals generally represent the same components.

[0014] Figure 1 is the overall structural schematic diagram of this application;

[0015] Figure 2 is the partial structural schematic diagram of this application.

[0016] REFERENCE NUMERALS

[0017] 1 - Feed hopper, 2 - Liner, 3 - Annular air duct, 4 - Air inlet nozzle, 5 - Main air duct, 6 - Temperature sensor, 7 - Valve, 8 - Hot air blower, 9 - Air cannon, 10 - Support, 11 - Coal feeder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The embodiments of this application will be described in more detail below with reference to the drawings. Although the embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0019] It should be understood that although terms such as "first", "second", and "third" may be used in this application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more unless otherwise specifically defined.

[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0021] Unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0022] See Figure 1 , 2 , an anti-blocking feed hopper for a coal feeder, comprising a feed hopper 1, an annular air duct 3, an air inlet nozzle 4, a main air duct 5, a valve 7, and a hot air blower 8. To ensure strength, the feed hopper 1 is made of alloy, and the feed hopper 1 is connected to the feed end of the coal feeder 11 through a flange. The feed hopper 1 has a funnel-shaped structure, and an annular air duct 3 is fixedly installed on the outer side of its bottom. The annular air duct 3 is evenly provided with air inlet nozzles 4. After passing through the side wall of the feed hopper 1, the air inlet nozzles 4 extend into the hopper. Further, when the air inlet nozzles 4 are installed, they are inclined downward, with the lower end of the air outlet being lower and the end connected to the annular air duct 3 being higher, thereby reducing the risk of coal entering the annular air duct 3 from the air outlet and ensuring the smoothness of the annular air duct 3. One end of the main air duct 5 is connected to the annular air duct 3, and the other end is connected to the hot air blower 8. The hot air blower 8 can supply air to the annular air duct 3. To facilitate controlling the amount of supplied air, a valve 7 is also installed on the main air duct 5. The valve 7 is selected as an electromagnetic valve, and the valve 7 is connected to the control center of the factory, thereby facilitating remote control of the valve 7.

[0023] During use, the valve 7 is opened, and the hot air blower 8 is started. The hot air passes through the main air duct 5 and then enters the annular air duct 3, and enters the bottom of the feed hopper 1 from each air inlet nozzle 4. Since the hot air will naturally rise, the hot air at the bottom of the feed hopper 1 will pass through the gaps between the coal from bottom to top and heat the coal, thereby avoiding the phenomenon of freezing and sticking and ensuring the smoothness of the feed hopper 1.

[0024] Furthermore, coal may contain corrosive substances such as sulfides and chlorides. These substances are likely to chemically react with metals under humid conditions, leading to metal corrosion. Therefore, a lining plate 2 is installed on the inner wall of the feed hopper 1. The lining plate 2 is made of wear-resistant non-metallic material, and ultra-high molecular weight polyethylene material can be selected. Ultra-high molecular weight polyethylene has an extremely low surface energy and friction coefficient, which makes the adsorption force on its surface very weak and the anti-adhesion ability strong. This can not only alleviate the problem that the feed hopper 1 is vulnerable to corrosion but also further reduce the risk of freezing and sticking phenomena.

[0025] Since the blockage of the feed hopper 1 may also be caused by the accumulation and extrusion of coal mine, to ensure its smoothness, a support 10 is fixedly arranged on the outside of the feed hopper 1, and an air cannon 9 is fixedly installed on the support 10. The emission port of the air cannon 9 penetrates the side wall of the feed hopper 1 and the lining plate 2 and then extends into the hopper. When the feed hopper 1 is blocked, it can be dredged through the air cannon 9.

[0026] On the basis of the above embodiments, the outer sides of the main air duct 5 and the annular air duct 3 are both wrapped with heat-insulating materials, so as to reduce the heat dissipation during the hot air transportation process. And a temperature sensor 6 is also installed on the main air duct 5, so as to facilitate the real-time monitoring of the temperature of the hot air in the pipeline and facilitate the staff to adjust the hot air temperature.

[0027] Specific working process:

[0028] When the climate is cold, during the process of adding coal mine into the feed hopper 1, the valve 7 is opened and the hot air blower 8 is started, so as to supply air to the bottom of the feed hopper 1. The hot air passes through the gaps between the coal mines during the rising process, heating the coal mine, thus reducing the occurrence of freezing and sticking phenomena. When the feed hopper 1 is blocked, the feed hopper 1 can be dredged through the air cannon 9.

[0029] Finally, it should also be noted that in this article, relationships such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms including, containing or any other variant are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or equipment.

[0030] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An anti-blocking feed hopper for a coal feeder, characterized in that: It includes a feed hopper (1), an annular air duct (3), an air inlet nozzle (4), a main air duct (5), a valve (7), and a hot air blower (8). The feed hopper (1) is fixedly installed at the feed end of the coal feeder (11), and the annular air duct (3) is installed at the bottom of the feed hopper (1). The air inlet nozzles (4) are evenly arranged on the annular air duct (3). The air inlet nozzles (4) penetrate the side wall of the feed hopper (1) and extend into the hopper. One end of the main air duct (5) is connected to the annular air duct (3), and the other end is connected to the hot air blower (8). A valve (7) is also installed on the main air duct (5).

2. The anti-blocking feed hopper for a coal feeder according to claim 1, characterized in that: A lining plate (2) is installed on the inner wall of the feed hopper (1). The lining plate (2) is made of a wear-resistant non-metallic material.

3. The anti-blocking feed hopper for a coal feeder according to claim 2, characterized in that: A support (10) is arranged outside the feed hopper (1). An air cannon (9) is fixedly installed on the support (10). The launch port of the air cannon (9) penetrates the side wall of the feed hopper (1) and the lining plate (2) and extends into the hopper.

4. The anti-blocking feed hopper for a coal feeder according to claim 1, characterized in that: A temperature sensor (6) is installed on the main air duct (5).

5. The anti-blocking feed hopper for a coal feeder according to claim 1, characterized in that: Both the main air duct (5) and the annular air duct (3) are wrapped with heat-insulating materials.

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