Internal and external transmission combined furnace bottom assembly for gas producer

Abstract

The utility model discloses an internal and external transmission combined furnace bottom assembly for a gas producer, which comprises an ash tray, a furnace bottom shell and a main shaft, one end of the main shaft is connected with a center hole of the ash tray, the other end of the main shaft is connected with a first gear, the ash tray is positioned in the furnace bottom shell, a second gear is arranged at the bottom of the ash tray, and the second gear is connected with the main shaft. A cavity for accommodating the second gear is formed in the furnace bottom shell; the gas producer has the beneficial effects that the first gear for realizing external transmission and the second gear for realizing internal transmission are arranged, and both the first gear and the second gear can drive the ash tray of the producer body to rotate, so that the overhaul interval of the gas producer is greatly prolonged, and the gas production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of coal gas production and manufacturing, in particular to an internal and external transmission combined furnace bottom assembly for a coal gas generator. Background Art

[0002] A gasifier is a production equipment that converts coal into combustible gas (i.e., coal gas, the main components of which are CO, H2, CH4, etc.). Its working principle is as follows: after the coal that meets the gasification process indicators is screened, it is added into the gasifier by a stoker, and then steam or air is blown into the bottom of the furnace to make the coal burn in the furnace to generate combustible gas.

[0003] During the operation of the gasifier, the ash pan carrying the coal inside needs to rotate continuously. In the prior art, a gear coaxial with the ash pan is generally set, and the gear is driven to rotate by a turbine reducer, which in turn drives the ash pan to rotate. There are currently two driving methods, namely, an external transmission method in which the gear is set on the outside of the furnace bottom shell and an internal transmission method in which the gear is set inside the furnace bottom shell. The patents previously applied by the inventor, with announcement numbers "CN201151711 - A central ventilation gasifier furnace bottom" and "CN102071070B - A large gear ring internal transmission furnace bottom assembly", have explained the above two driving methods in detail.

[0004] However, the inventors discovered during the gas production process that the existing gasifiers still have shortcomings: because the inside of the gasifier is burning high-temperature coal, the working environment is relatively harsh, resulting in a short service life of the gears themselves; and using a single external transmission or internal transmission method, once a gear fails, it needs to be shut down for maintenance or replacement, affecting the normal production of gas. Summary of the invention

[0005] The utility model aims to overcome the shortcomings of the prior art and provide a furnace bottom assembly whose internal transmission and external transmission modes can be switched at any time.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A combined internal and external transmission furnace bottom assembly for a gas generator, comprising an ash pan, a furnace bottom shell and a main shaft, one end of the main shaft being connected to a center hole of the ash pan, the other end of the main shaft being connected to a first gear, the ash pan being located in the furnace bottom shell, a second gear being provided at the bottom of the ash pan, a cavity for accommodating the second gear being provided in the furnace bottom shell, a first opening being provided at the bottom of the cavity for entry of a meshing gear of the second gear.

[0008] Preferably, the main shaft is installed in a bearing housing, the bearing housing is located in a bellows housing, and the bellows housing is connected to the furnace bottom shell and is located at the center of the furnace bottom shell.

[0009] Preferably, two air inlets are symmetrically arranged on the side wall of the bellows housing.

[0010] Preferably, the utility model further comprises balls supporting the rotation of the ash pan, an upper slide is arranged at the bottom of the ash pan, a lower slide is arranged on the inner wall of the furnace bottom shell, and a spherical space for placing the balls is formed between the upper slide and the lower slide.

[0011] Preferably, a second opening is provided on the furnace bottom shell and the lower slideway for allowing lubricating oil to enter the spherical space.

[0012] The beneficial effects of the utility model are:

[0013] 1. By setting a first gear for realizing external transmission and a second gear for realizing internal transmission, both gears can drive the ash pan of the furnace body to rotate, so that the driving mode of the ash pan of the gas generator can be switched between external transmission and internal transmission at any time, thereby greatly extending the maintenance interval of the gas generator and improving the gas production efficiency. When a gear fails, the driving mechanism can be meshed with another gear, which greatly extends the shutdown interval of the gas generator and improves the gas production efficiency.

[0014] 2. The bearing housing is set to make the rotation of the main shaft more stable; at the same time, two air inlets are set on the bellows housing to eliminate the dead corners of air supply in the furnace and make the air distribution in the furnace more uniform.

[0015] 3. The setting of balls and slideways makes the ash pan rotate more smoothly, ensuring that the coal it carries can be fully burned. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the utility model;

[0017] Figure 2 for Figure 1 A partial enlarged view of I.

[0018] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings. Example

[0020] like Figure 1As shown, an internal and external transmission combined furnace bottom assembly for a gas generator in this embodiment includes an ash pan 1, a furnace bottom shell 2 and a main shaft 5. The upper end of the main shaft 5 is connected to the center hole of the ash pan 1 by a key, and the lower end of the main shaft 5 is connected to the center hole of the first gear 6 by a key. The connection between the main shaft 5 and the ash pan 1 and the first gear 6 is provided with a shoulder for positioning, and the bottom of the main shaft 5 is also provided with a retaining ring 51 to prevent the first gear 6 from falling. The ash pan 1 is located in the furnace bottom shell 2, and a second gear 7 is provided at the bottom of the ash pan 1. The second gear 7 and the ash pan 1 can be connected by bolts. A cavity 21 for accommodating the second gear 7 is provided in the furnace bottom shell 2, and a first opening 22 for the meshing gear of the second gear 7 to enter is provided at the bottom of the cavity 21. In this embodiment, the second gear 7 is an external gear, and the output gear of the turbine reducer extends from the first opening 22 into the gap between the second gear 7 and the inner wall of the furnace bottom shell 2, and meshes with the second gear 7, and the rotation of the turbine reducer drives the second gear to rotate. In some embodiments, the second gear 7 may also be an internal gear.

[0021] During the gas production process, the output gear (not shown) of the turbine reducer drives the first gear 6 or the second gear 7 to rotate. The first gear 6 drives the ash pan 1 to rotate through the main shaft 5, while the second gear 7 can directly drive the ash pan 1 to rotate.

[0022] The main shaft 5 is installed in the bearing box 4, and the bearing box 4 is fixedly arranged inside the bellows shell 3, so that the rotation of the main shaft 5 is more stable. The bellows shell 3 is located at the center of the furnace bottom shell 2 and is connected to the furnace bottom shell 2 by bolts.

[0023] Two air inlets 31 are symmetrically arranged on the side wall of the bellows housing 3, thereby eliminating dead corners of air supply in the furnace body and making the air distribution in the furnace body more uniform.

[0024] like Figure 2 As shown, this embodiment also includes a ball bearing 8 that supports the rotation of the ash pan 1. An upper slide 81 is provided at the bottom of the ash pan 1, and a lower slide 82 is provided on the inner wall of the furnace bottom shell 2. A spherical space for placing the ball bearing 8 is formed between the upper slide 81 and the lower slide 82. The provision of the ball bearing 8 makes the rotation process of the ash pan 1 more stable. A second opening 23 is provided on the furnace bottom shell 2 and the lower slide 82. Lubricating oil can be injected into the spherical space through the second opening 23 to extend the service life of the ball bearing 8. At the same time, the bottom surface of the upper slide 81 forms a similar surrounding structure with the lower slide 82 to prevent the lubricating oil from splashing out of the spherical space, reduce the amount of lubricating oil, and also optimize the working environment in the furnace bottom shell 2.

[0025] In this embodiment, by setting the first gear 6 and the second gear 7, when a gear fails, the output gear of the turbine reducer can be quickly meshed with another gear without shutting down the furnace for maintenance, which greatly extends the shutdown interval of the furnace and improves the gas production efficiency.

[0026] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the protection scope of the technical solution of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0028] If the words "first", "second" and so on are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description. Unless otherwise stated, the above words have no special meaning.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An internal and external transmission combined furnace bottom assembly for a gas generator, comprising an ash tray, a furnace bottom shell and a main shaft, characterized in that: One end of the main shaft is connected to the center hole of the ash pan, and the other end of the main shaft is connected to the first gear. The ash pan is located in the furnace bottom shell. A second gear is arranged at the bottom of the ash pan. A cavity for accommodating the second gear is arranged in the furnace bottom shell. A first opening is arranged at the bottom of the cavity for the meshing gear of the second gear to enter.

2. The internal and external transmission combined furnace bottom assembly for a gas generator according to claim 1, characterized in that: The main shaft is installed in a bearing housing, the bearing housing is located in a bellows housing, and the bellows housing is connected to the furnace bottom shell and is located at the center of the furnace bottom shell.

3. The internal and external transmission combined furnace bottom assembly for a gas generator according to claim 2, characterized in that: The side wall of the bellows housing is symmetrically provided with two air inlets.

4. The internal and external transmission combined furnace bottom assembly for a gas generator according to claim 1, characterized in that: It also includes balls supporting the ash pan to rotate. The bottom of the ash pan is provided with an upper slideway, and the inner wall of the furnace bottom shell is provided with a lower slideway. A spherical space for placing the balls is formed between the upper slideway and the lower slideway.

5. The internal and external transmission combined furnace bottom assembly for a gas generator according to claim 1, characterized in that: The furnace bottom shell and the lower slide are provided with second openings for lubricating oil to enter the spherical space.

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