CN219400363U - Wet coal crusher with weighing function - Google Patents

Abstract

The utility model relates to a wet coal crusher with a weighing function, and belongs to the technical field of raw coal sampling and sample preparation. Aiming at the problems that a wet coal crusher is not high-efficient and accurate at present and moisture loss in the coal crushing process is not quantized rapidly, the utility model designs a set of simple, high-efficient and rapid wet coal crushing method, and simultaneously rapidly judges the moisture loss of the coal in the crushing process, solves the difficult problem that the coal-fired management of a power plant is always plagued for online or offline sample preparation of the wet coal, and improves the coal-fired acceptance efficiency of the power plant. The device mainly comprises a weighing unit, a crushing unit, a power unit and a control system, and has the advantages of compact structure, reasonable design, simple method, convenient operation and use, and accurate and reliable test result.

Description

Wet coal crusher with weighing function

Technical Field

The utility model belongs to the technical field of raw coal sampling and sample preparation, and relates to a coal wet coal crusher with a weighing function and capable of rapidly calculating water loss of coal.

Background

Coal is taken as grain of thermal power enterprises, the maximum cost of the coal accounts for about 70% of the total power generation cost, and accurate acceptance and metering of the coal are very important for enterprise operation and profit. At present, the popularity of a mechanized sampling device in a power plant is close to 100%, the normal maximum granularity of a mechanically collected sample is 13mm, the sample still needs to be crushed by a crushing device, the granularity of the sample is reduced, and the quality of the sample is reduced by reduction, so that the requirements of laboratory detection are met. The coal sources of all thermal power generation enterprises are complex at present, long-cooperative coal exists, market coal exists at the same time, different coal quality indexes are large in difference, particularly in rainy seasons, the moisture content in the coal is high, the crusher cavity is easy to block in the mechanical sampling and sample preparation process, the acceptance time is prolonged, the overhaul frequency is increased, the crusher cavity is required to be manually opened for manual treatment, and the mechanical sampling and sample preparation work of coal acceptance is difficult to realize.

The sampling on-line crusher and the crusher in the sample preparation room produced by domestic main equipment manufacturers are mostly vertical crushers without sieve plates or horizontal ring hammer crushers with sieve plates, the two crushers have good crushing effect on conventional coal, but the crushing effect on wet coal with large moisture content is poor, the coal is easy to block in the crusher cavity or on the hammer head, so that sample pollution is caused, the sample preparation representativeness is poor, and the crusher cavity is blocked even more, so that the continuous acceptance check is not possible. In addition, moisture loss of different degrees can be caused in the process of checking and accepting coal in factories by utilizing a mechanized sampling and sample preparing mode, particularly, the crusher is used for crushing coal from large particles to small particles, the cavity of the crusher heats and the air flow velocity is high in the process, and the moisture loss of the coal sample is caused.

The publication date is 2021, 04 and 20, and the Chinese patent with publication number of CN213000416U discloses an utility model patent named as a coal crusher. This patent procapsid is articulated with organism one end, and the other end blocks through gyratory ring and fixture block with the organism, prevents that the procapsid from deviate from, and inside is provided with broken chamber, and broken intracavity is provided with broken roller, coaxial fixed connection with the belt pulley respectively, broken roller surface distribution has broken sword, and broken chamber lower part is provided with the discharge gate for unloading, broken chamber and procapsid inner wall all distribute irregular counterattack awl. Although this crusher is efficient in crushing, it is not effective in crushing wet coal, is prone to clogging, and is not provided with a weighing device, so that it has the above-described drawbacks.

Therefore, how to effectively and rapidly crush wet coal in the coal acceptance sampling and sample preparation process, improve acceptance efficiency, and rapidly judge the moisture loss of coal in the crushing process is always a difficult problem which puzzles the coal burning management of a power plant.

Aiming at the condition that wet coal is not crushed effectively and rapidly at present temporarily, the utility model designs and develops a set of simple crusher which is suitable for crushing the wet coal, and can rapidly judge the real moisture loss of the coal in the crushing process through the weighing devices of the feed inlet and the discharge outlet, thereby solving the difficult problem that the coal-fired management of a power plant is always plagued for online or offline sample preparation of the wet coal, and improving the coal-fired acceptance efficiency of the power plant.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides the wet coal crusher with the weighing function, which has the advantages of compact and reasonable structural design, safety, reliability, convenient operation and accurate test, is suitable for crushing wet coal and can rapidly judge the water loss of the coal.

The utility model solves the problems by adopting the following technical scheme: this wet coal breaker that possesses function of weighing, including control system who controls breaker output, weighing process and equipment running state, its characterized in that: the wet coal crushing unit comprises a feed hopper, a barrel, a crusher cavity, a main shaft, a crusher chain type hammer head and a discharge port, wherein the upper end of the feed hopper is matched with the feed inlet dynamic weighing device, the lower end of the discharge port is matched with the outlet dynamic weighing device, the crusher cavity is arranged in the barrel, and the crusher chain type hammer head is arranged in the crusher cavity; the power unit comprises a V-belt, a belt pulley, a motor and a motor frame, wherein the belt pulley is connected with the main shaft through the V-belt, the belt pulley is matched with the motor, and the motor is arranged on the motor frame.

Preferably, the wet coal crushing unit further comprises a cylinder end cover and a cylinder liner plate, wherein the cylinder liner plate is arranged in the cylinder, and the cylinder end cover is matched with the cylinder.

Preferably, the utility model also comprises chains, wherein the main shaft is provided with three rotors which are divided into an upper layer, a middle layer and a lower layer, six chains are arranged in each rotor, and the end part of each chain is provided with a chain hammer of the crusher; the method is convenient for breaking the block coal, the hammer head chain is lengthened gradually from top to bottom, the rotation radius of the uppermost layer is shortest, the radius of the lowermost layer is longest, and the optimal breaking effect of wet coal is achieved.

Preferably, the chain type hammer head of the crusher adopts a chain type hammer head, and the chain type hammer head adopts stainless steel; can flexibly rotate in the rotating process, is convenient for crushing coal and is not easy to block.

Preferably, the crusher cavity is made of steel plates and is of an open-close type; the chain and the stainless steel hammer are convenient to assemble, disassemble, overhaul and replace.

Preferably, the dynamic weighing device of the feed inlet and the dynamic weighing device of the outlet are respectively arranged at the inlet and the outlet of the crusher; and recording the quality of the coal sample entering the crusher and outputting the crusher at the moment, and judging the water loss condition of the coal in the crushing process of the crusher cavity.

Compared with the prior art, the utility model has the following advantages and effects: due to the special arrangement of the chain hammer head and the crusher cavity, the crushing equipment is convenient for processing wet coal crushing, and the water loss in the coal crushing process is quantized and accurately calculated; the device is based on the existing crusher, and is added with a part of testing device, so that the device has the advantages of compact structure, reasonable design, simple method, convenient operation and use, and accurate and reliable testing result.

Drawings

Fig. 1 is a schematic structural view of a wet coal breaker with weighing function according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of the chain distribution profile on the inner rotor in the cavity A-A of fig. 1.

In the figure: the dynamic weighing device for the feed inlet comprises a dynamic weighing device 1 for the feed hopper, a feed hopper 2, a main shaft 3, a V-belt 4, a belt pulley 5, a motor 6, a motor frame 7, a machine frame 8, a self-aligning bearing 9, a cylinder end cover 10, a cylinder 11, a cylinder liner plate 12, a crusher cavity 13, a crusher chain hammer 14, a chain seat vertical bearing 15, a discharge port 16 and an outlet dynamic weighing device 17.

Detailed Description

The present utility model will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present utility model and not limited to the following examples.

Examples

Referring to fig. 1 to 2, the wet coal breaker with weighing function of the present embodiment includes a weighing unit, a breaking unit, a power unit and a control system; the weighing unit comprises a feed inlet dynamic weighing device 1 and an outlet dynamic weighing device 17, and the control system controls the output of the crusher, the weighing process and the running state of equipment; the device has reasonable and compact structure and accurate and reliable test result.

The wet coal crushing unit in this embodiment includes feeder hopper 2, barrel 11, breaker cavity 13, main shaft 3, breaker chain formula tup 14 and discharge gate 16, and the upper end of feeder hopper 2 matches with feed inlet dynamic weighing device 1, and the lower extreme of discharge gate 16 matches with export dynamic weighing device 17, and barrel 11 inside is provided with breaker cavity 13, and breaker chain formula tup 14 sets up in breaker cavity 13.

The power unit in this embodiment includes V-belt 4, belt pulley 5, motor 6 and motor frame 7, links to each other through V-belt 4 between belt pulley 5 and the main shaft 3, and belt pulley 5 cooperates with motor 6, and motor 6 installs on motor frame 7.

The wet coal crushing unit in this embodiment further includes a barrel end cover 10 and a barrel liner 12, the barrel liner 12 is provided in the barrel 11, and the barrel end cover 10 is matched with the barrel 11.

The main shaft 3 in the embodiment is provided with three rotors which are divided into an upper layer, a middle layer and a lower layer, six chains 13 are arranged in each rotor, and the end part of each chain 13 is provided with a chain hammer 14 of the crusher; the method is convenient for breaking the block coal, the hammer head chain is lengthened gradually from top to bottom, the rotation radius of the uppermost layer is shortest, the radius of the lowermost layer is longest, and the optimal breaking effect of wet coal is achieved.

The chain hammer 14 of the crusher in the present embodiment is a chain hammer made of stainless steel; can flexibly rotate in the rotating process, is convenient for crushing coal and is not easy to block.

The crusher cavity 13 in the embodiment is made of steel plates and is of an open-close type; the chain and the stainless steel hammer are convenient to assemble, disassemble, overhaul and replace.

The dynamic weighing device 1 of the feed inlet and the dynamic weighing device 17 of the outlet in the embodiment are respectively arranged at the inlet and the outlet of the crusher; and recording the quality of the coal sample entering the crusher and outputting the crusher at the moment, and judging the water loss condition of the coal in the crushing process of the crusher cavity 13.

The cylinder 11 and the motor frame 7 in the embodiment are fixed on the machine frame 8 and are arranged according to the actual installation position;

the upper and lower ends of the main shaft 3 in this embodiment are provided with a self-aligning bearing 9 and a chain pedestal bearing 15, respectively.

In order to strengthen the sealing performance of the machine, all openable and closable joint parts of the wet coal crusher are provided with lining rubber strips for sealing, so that dust in the coal sample crushing process is reduced.

The moisture loss test process in the coal crushing process of this embodiment is as follows:

before measurement, preparing a coal sample with the nominal maximum particle size of 50mm and a certain water content, and checking that the wet coal crusher operates normally;

(S2) weighing the sample weight M to be crushed of the feeding through the feeding port dynamic weighing device 1 ₁ ；

(S3) crushing the sample by a crusher, discharging from a discharge hole 16, cleaning the inside of the crusher cavity 13, and weighing the weight M of the sample at the discharge hole by an outlet dynamic weighing device 17 ₂ According to the weighing data, calculating the water loss in the coal sample crushing process;

calculating the water loss according to the formulas (1) and (2):

ΔM＝M ₁ -M ₂ (1)

wherein: Δm—the amount of moisture lost during crushing, kg;

M ₁ -the mass of the coal sample fed in kg;

M ₂ the quality of the discharged coal sample is kg.

Wherein: m' -loss of moisture during crushing,%;

Δm—the amount of moisture lost during crushing, kg;

M ₁ the mass of the coal sample to be fed is kg.

From the above description, those skilled in the art will be able to practice.

In addition, it should be noted that the specific embodiments described in the present specification may vary from part to part, from name to name, etc., and the above description in the present specification is merely illustrative of the structure of the present utility model. All equivalent or simple changes of the structure, characteristics and principle according to the inventive concept are included in the protection scope of the present patent. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the utility model as defined in the accompanying claims.

Claims (6)

1. The utility model provides a wet coal breaker that possesses function of weighing, includes control system that control breaker output, weighing process and equipment running state, its characterized in that: the wet coal crushing device comprises a crushing device, a crushing unit and a power unit, wherein the crushing device comprises a feeding hopper (2), a barrel (11), a crusher cavity (13), a main shaft (3), a crusher chain hammer (14) and a discharging hole (16), the upper end of the feeding hopper (2) is matched with the feeding port dynamic weighing device (1), the lower end of the discharging hole (16) is matched with the outlet dynamic weighing device (17), the crusher cavity (13) is arranged in the barrel (11), and the crusher chain hammer (14) is arranged in the crusher cavity (13); the power unit comprises a V-belt (4), a belt pulley (5), a motor (6) and a motor frame (7), wherein the belt pulley (5) is connected with the main shaft (3) through the V-belt (4), the belt pulley (5) is matched with the motor (6), and the motor (6) is arranged on the motor frame (7).

2. The wet coal breaker with weighing function according to claim 1, wherein: the wet coal crushing unit further comprises a cylinder end cover (10) and a cylinder liner plate (12), wherein the cylinder liner plate (12) is arranged in the cylinder (11), and the cylinder end cover (10) is matched with the cylinder (11).

3. The wet coal breaker with weighing function according to claim 1, wherein: the main shaft (3) is provided with three rotors which are divided into an upper layer, a middle layer and a lower layer, six chains are arranged in each rotor, and the end part of each chain is provided with a chain hammer (14) of the crusher.

4. A wet coal breaker with weighing function according to claim 1 or 3, characterized in that: the chain type hammer head (14) of the crusher is made of a chain type hammer head, and the chain type hammer head is made of stainless steel.

5. The wet coal breaker with weighing function according to claim 1, wherein: the crusher cavity (13) is made of steel plates and is of an opening-closing type.

6. The wet coal breaker with weighing function according to claim 1, wherein: the dynamic weighing device (1) of the feed inlet and the dynamic weighing device (17) of the outlet are respectively arranged at the inlet and the outlet of the crusher.