A light head hammer handle for use in a coal breaker

Abstract

The utility model relates to a coal crusher technical field, a kind of light head hammer handle for in coal crusher, including hammer handle, adopt metal material to make;Connecting assembly is set on hammer handle, for with transmission equipment connection;The hammer handle includes: connecting handle, from bottom to gradually converge into trapezoidal to middle upwards, hammer head, set in the top of connecting handle and be arc-shaped;The connecting handle and hammer head are integrally formed design;The utility model is through 87 pairs of light head hammer handle layered staggered arrangement (asymmetrical spiral distribution), coal material impact coverage increases 58%, reduces the residual of unbroken particle.It makes the comminution process more uniform and stable, the front end arc-shaped design of light head hammer handle changes impact force from "point contact" to "face contact", adapts the crushing demand of high-silicon coal (Mohs hardness 5.5), impact energy loss reduces, effectively solve the problem of specific coal kind fineness overproof, improve coke quality.

Description

Technical Field

[0001] This utility model relates to the field of coal crusher technology, specifically to a bald hammer handle used in a coal crusher. Background Technology

[0002] In the steel industry, coking is a crucial step in the production process. To effectively control costs, various types of coal are blended in specific proportions to form a compound coal. During this process, precise control of the coal fineness is critical to coke quality, which in turn affects the overall efficiency and cost of steel production. To achieve precise coal crushing, steel companies widely use hammer mills, which are equipped with different numbers of hammerheads and hammer handles (e.g., 58, 87, or 116 sets) to meet various crushing requirements.

[0003] However, in practical applications, traditional hammerhead and hammer-handle assemblies (such as the 58-piece set) may still exhibit excessive fineness when crushing specific coal types, such as Aikuang coal, even with screw adjustment. Furthermore, traditional hammerhead and hammer-handle assemblies have a limited lifespan; either the hammer-handle wears down or the hammerhead wears down and becomes unbalanced, rendering them unusable. The typical service life is about 6 months, or replacement is required when a single crusher processes 600,000 tons of coal. Frequent replacements increase equipment maintenance costs, and worn-down hammer-handles and shaft holes can corrode and seize, requiring oxy-acetylene cutting forcibly disassembling, damaging the equipment's base material, and each replacement takes 10-24 hours. This not only reduces equipment utilization but also negatively impacts the continuity of coking production. Utility Model Content

[0004] The purpose of this invention is to provide a bald hammer handle for use in a coal crusher, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bald hammer handle for use in a coal crusher, comprising: The hammer handle is made of metal. A connecting component, mounted on the hammer handle, is used for connection to a transmission device; The hammer handle includes: The connecting handle gradually narrows towards the middle from the bottom, forming a trapezoidal shape. The hammerhead is located at the top of the connecting handle and is arc-shaped.

[0006] Preferably, the connecting handle and the hammer head are integrally molded.

[0007] Preferably, the radius of the hammer head is millimeters, with an error of plus or minus millimeters.

[0008] Preferably, the hammer handle further includes: The mounting hole is made on the inner wall of the connecting handle.

[0009] Preferably, the connection component includes: The mounting sleeve is fixedly installed in the mounting hole; The connecting shaft is installed on the inner wall of the mounting sleeve.

[0010] Preferably, the mounting sleeve is made of QT250 cast iron.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes 87 sets of polished hammer handles arranged in a layered, staggered pattern (asymmetrical spiral distribution), increasing the coal impact coverage by 58% and reducing the residue of uncrushed particles. This makes the crushing process more uniform and stable. The arc-shaped design at the front end of the polished hammer handle transforms the impact force from "point contact" to "surface contact," adapting to the crushing requirements of high-silica coal (Mohs hardness 5.5), reducing impact energy loss, effectively solving the problem of excessive fineness in specific coal types, and improving coke quality. Extended service life: The service life of the bald hammer handle is extended to 12 months, significantly reducing the number of replacements and lowering equipment maintenance costs.

[0012] Maintaining weight balance and stability: Although the number of bald hammer handles has increased, the overall weight remains unchanged, ensuring the stability and safety of the equipment.

[0013] Easy to maintain and replace: The application of bald hammer handles allows for direct removal of the hammer handles during crusher hammer handle replacement without the need for oxygen cutting, thus improving the overall replacement efficiency by 20%. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the hammer handle structure of this utility model; Figure 3 This is a schematic diagram of the connection structure between the connecting handle and the mounting sleeve of this utility model; Figure 4 This is a diagram showing the arrangement of the hammerheads of this utility model.

[0015] In the diagram: 1. Hammer handle; 11. Connecting handle; 12. Hammer head; 13. Mounting hole; 2. Connecting assembly; 21. Mounting sleeve; 22. Connecting shaft. Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0017] Please see Figure 1-4As shown, a polished hammer handle for use in a coal crusher includes: a hammer handle 1, made of metal, weighing 20 kg and 583 mm in length; a connecting component 2, mounted on the hammer handle 1 for connection to a transmission device; the hammer handle 1 includes: a connecting handle 11, which gradually narrows from the bottom to the middle into a trapezoidal shape; a hammer head 12, located at the top of the connecting handle 11 and being arc-shaped, eliminating the hammer head protrusion and adopting an integrated polished hammer handle design, removing the traditional split hammer head structure, and the front end of the hammer handle 1 is designed as an arc-shaped polished head structure to reduce stress concentration points and extend fatigue life; the radius of the hammer head 12 is 48 mm, with an error of ±0.5 mm.

[0018] In this design, the hammer handle 1 is connected and fixed to the transmission device via connecting component 2. The transmission device drives the hammer handle 1 to crush coal. The hammerhead protrusion is eliminated, and a one-piece polished hammer handle design (weighing 20kg / pair) is adopted, removing the traditional split hammerhead structure. The front end of the hammer handle 1 is designed with an arc-shaped polished head structure (48mm in diameter) to reduce stress concentration points and extend fatigue life. By adjusting the hammer handle length (total length 583mm) and mass distribution, vibration during high-speed rotation is reduced, minimizing impact on bearings and the motor. 87 polished hammer handles are used, maintaining a total weight of 1.74t (compared to 58kg / pair). The auxiliary raw material assembly is the same, but the weight of a single hammer handle is reduced (20kg), achieving a dense distribution. It is divided into 12 groups from the bearing end to the motor end (as arranged in the background art description). Each group of hammer handles is distributed in an asymmetrical spiral (e.g., group 1: 25-49-73-78-54-30-6-316). By increasing the density of the hammer handles and the impact coverage, the uniformity of coal crushing is improved. Through the arc-shaped front end design of the bald hammer handle, the impact force is changed from "point contact" to "surface contact", expanding the force-bearing area of ​​the coal, reducing the energy loss of a single impact, and reducing the wear rate of the hammer handle.

[0019] Based on the above implementation scheme, the connecting handle 11 and the hammer head 12 are designed as a single piece; refer to Figure 2 The hammer handle 1 eliminates the hammer head protrusion and adopts an integrated bald hammer handle design (weight 20kg / pair). It removes the traditional split hammer head structure and the front end of the hammer handle 1 is designed as an arc-shaped bald head structure (diameter 48mm), which reduces stress concentration points and extends fatigue life.

[0020] Based on the above implementation scheme, the hammer handle 1 further includes: a mounting hole 13, which is formed on the inner wall of the connecting handle 11; the connecting assembly 2 includes: a mounting sleeve 21, which is fixedly installed in the mounting hole 13; and a connecting shaft 22, which is installed on the inner wall of the mounting sleeve 21. The inner diameter of the mounting hole 13 is the same as the outer diameter of the mounting sleeve 21. The mounting sleeve 21 is welded in the mounting hole 13 to improve the wear resistance of the mounting hole 13. The connecting shaft 22 is snapped into the mounting sleeve 21 and can be replaced.

[0021] During installation, the connecting shaft 22 is installed into the mounting sleeve 21 and then connected and fixed to the transmission equipment.

[0022] Based on the above implementation plan, the installation sleeve 21 adopts a QT250 cast iron sleeve.

[0023] The thickness of the mounting sleeve 21 has been increased to 3.2mm, and the QT250 cast iron sleeve has high hardness, which improves its wear resistance.

[0024] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A bald hammer handle for use in a coal crusher, characterized in that, include: The hammer handle (1) is made of metal. A connecting component (2) is provided on the hammer handle (1) for connecting to a transmission device; The hammer handle (1) includes: The connecting handle (11) gradually narrows from the bottom upwards towards the middle to form a trapezoidal shape; The hammerhead (12) is located on the top of the connecting handle (11) and is arc-shaped.

2. The bald hammer handle for a coal crusher according to claim 1, characterized in that: The connecting handle (11) and the hammer head (12) are designed as a single piece.

3. The bald hammer handle for a coal crusher according to claim 1, characterized in that: The radius of the hammer (12) is 48 mm, and the error is ±0.5 mm.

4. A bald hammer handle for a coal crusher according to claim 1, characterized in that: The hammer handle (1) further includes: Mounting hole (13) is formed on the inner wall of connecting handle (11).

5. A bald hammer handle for a coal crusher according to claim 4, characterized in that: The connection component (2) includes: The mounting sleeve (21) is fixedly installed in the mounting hole (13); The connecting shaft (22) is installed on the inner wall of the mounting sleeve (21).

6. A bald hammer handle for a coal crusher according to claim 5, characterized in that: The mounting sleeve (21) is made of QT250 cast iron.

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