An internal airflow self-circulating impact crusher

Abstract

The present invention relates to the field of mining crushing equipment, and in particular to an internal airflow self-circulating impact crusher, wherein a feed inlet chute is arranged below a frame feed inlet, a front side plate is arranged below the feed inlet chute, the front side plate is fixedly connected to the frame, the front side plate is bent, a feed inlet baffle is arranged on the frame between the front side plate and the rotor, a gap is provided between the feed inlet baffle and the rotor, an air duct is formed between the feed inlet baffle, the front side plate and the frame fixing the front side plate, a gap between the end of the feed inlet baffle and the end of the front side plate is an air inlet, and a gap between the top of the feed inlet baffle and the top of the front side plate is an air outlet. Through the air duct, the airflow generated when the rotor is running is internally self-circulated with the shortest distance and the smallest resistance, and the return air distance is almost 0, thereby improving the return air efficiency, reducing the wind pressure at the discharge port, ensuring that the total exhaust volume inside the impact crusher is close to zero, reducing the exhaust volume, and reducing the dust removal power.

Description

Technical Field

[0001] The invention relates to the field of mining crushing equipment, and in particular to an internal airflow self-circulating impact crusher. Background Art

[0002] As a crusher that uses the impact principle to crush materials, the impact crusher has the characteristics of simple structure, high reliability, good product particle shape, and a wide range of applications. It is widely used in mining, chemical, construction, railway and other industries.

[0003] During the high-speed operation of the impact crusher rotor, the material is continuously impacted and crushed, which will produce a large amount of fine powder. At the same time, the high-speed operation of the rotor will also produce a fan effect, causing a large gas flow inside the crusher. For example, a 200kw impact crusher can produce 10,000 cubic meters of dust-containing gas per hour.

[0004] In order to improve the crushing efficiency and prevent the material from falling directly from the feed port without participating in the collision, the feed port baffle of the impact crusher is generally set to maintain a small gap with the rotor, which causes the airflow generated when the rotor rotates to be divided and cut off, so that the air entering the feed port cannot form an internal closed cycle. Most of the airflow can only be discharged from the discharge port, which generates local positive pressure, makes sealing difficult, and carries a large amount of micro powder to cause dust. In order to reduce the impact on the environment, the impact crusher is generally equipped with a dust removal device. Due to the large amount of discharged air, a large air volume dust removal device is required, which increases the investment cost and increases the consumption of dust removal power.

[0005] Despite the above-mentioned shortcomings, the impact crusher has irreplaceable advantages in finished product particle shape compared with other types of crushers. Therefore, how to reduce the dust emission and dust removal power consumption of the impact crusher is the key research direction of the industry.

[0006] Patent CN85203245U discloses a dust removal impact crusher structure, which adopts internal air intake, rear external duct or side external duct return air, etc., in order to balance the internal wind pressure and reduce the exhaust volume. Both external ducts need to return air from the high position of the feed inlet, resulting in a significant extension of the return air channel and the presence of an elbow greater than 90°, which greatly increases the return air resistance and reduces the balancing effect, and has limited improvement on the exhaust pressure and exhaust volume. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an internal airflow self-circulating impact crusher, thereby reducing circulating wind pressure and exhaust volume and lowering dust removal power consumption.

[0008] The technical solution of the present invention is achieved in this way:

[0009] An internal airflow self-circulating impact crusher comprises an impact crusher arranged on a base, the impact crusher comprises a frame, the top of the inner side of the frame is connected with an impact frame through an impact frame adjusting device, the impact frame adjusting device runs through the top of the frame, the impact frame is hingedly connected with the corresponding impact frame adjusting device, a rotor is arranged at the lower inner side of the frame, a discharge port is arranged below the rotor, a feed port blocking curtain is arranged at the feed port of the frame, a feed port slide plate is arranged below the feed port of the frame, the feed port slide plate is arranged tilted downward, a sealing cover is arranged at the discharge port, and a sealing cover is arranged at the sealing cover. A conveyor belt is arranged below the cover, and the sealing cover is closedly connected to the discharge port and the conveyor belt; a front side plate is arranged below the feed port slide plate, the front side plate is fixedly connected to the frame, the front side plate is bent, a feed port baffle is arranged on the frame between the front side plate and the rotor, a gap is provided between the feed port baffle and the rotor, an air duct is formed between the feed port baffle, the front side plate and the frame fixing the front side plate, the gap between the end of the feed port baffle and the end of the front side plate is the air inlet, and the gap between the top of the feed port baffle and the top of the front side plate is the air outlet.

[0010] There is a height difference a between the top of the feed inlet baffle and the inclined surface of the feed inlet slide.

[0011] The feed inlet slide plate is provided with a feed inlet slide plate lining plate.

[0012] A front side plate lining plate is arranged on the inner side of the front side plate.

[0013] A feed inlet baffle lining plate is arranged on one side of the feed inlet baffle plate close to the rotor.

[0014] The feed inlet slide plate lining, the front side plate lining and the feed inlet baffle lining are all made of wear-resistant parts and have the same thickness.

[0015] The top of the feed inlet baffle liner is covered on the top of the feed inlet baffle, and the top of the feed inlet baffle liner is inclined and the inclination angle is consistent with the inclination angle of the feed inlet slide.

[0016] The bent front side plate comprises an upper inclined portion connected to the feed inlet slide plate, a vertical portion connected to the end of the upper inclined portion, and a lower inclined portion connected to the end of the vertical portion.

[0017] The positive effect of the present invention is as follows: the present invention sets a built-in air duct according to the structure of the impact crusher, and sets an air inlet below the baffle plate of the feed port of the impact crusher, and sets an air outlet between the feed port slide plate and the feed port baffle. Through the air duct, the air flow generated when the rotor runs is internally self-circulated with the shortest distance and the smallest resistance, and the return air distance is almost 0, thereby improving the return air efficiency, reducing the wind pressure at the discharge port, ensuring that the total exhaust volume inside the impact crusher is close to zero, reducing the exhaust volume, and reducing the dust removal power.

[0018] The air duct of the present invention is a part of the impact crusher body, and is respectively composed of a frame, a front side plate and an inlet baffle. The air duct of the present invention is arranged below the inlet in front of the rotor, and is completely on the tangent line of the circular operation of the airflow. The angle at which the airflow turns is less than 30°, and almost no resistance is generated by the airflow. However, the reference document CN85203245U has an elbow of 90° to 180°, which greatly increases the return air resistance and reduces the balancing effect.

[0019] The present invention can complete the internal airflow self-circulation without using external equipment and pipelines, and the arrangement of the internal air duct is based on the structure of the impact crusher. Therefore, the present invention has more overall unity and does not increase the space occupied by the impact crusher. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a structural schematic diagram of the air duct of the present invention.

[0022] Figure 3 It is a schematic diagram of the internal airflow self-circulation when the present invention is working.

[0023] Figure 4 This is the working principle diagram of the traditional impact crusher.

[0024] Figure 5 It is a working principle diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0025] like Figures 1 to 3As shown, an internal airflow self-circulation impact crusher includes an impact crusher 1 installed on a base 18, the impact crusher 1 includes a frame 2, the top of the inner side of the frame 2 is connected to an impact frame 3 through an impact frame adjusting device 4, the impact frame adjusting device 4 runs through the top of the frame 2, the impact frame 3 is hingedly connected to the corresponding impact frame adjusting device 4, a rotor 5 is installed on the lower inner side of the frame 1, a discharge port 6 is reserved below the rotor 5, a sealing cover 19 is connected to the discharge port 6, a conveyor belt 20 is provided below the sealing cover 19, and the sealing cover 19 is closed and connected to the discharge port 6 and the conveyor belt 20; a feed port curtain 17 is connected to the feed port of the frame, a feed port slide plate 14 is fixedly connected below the feed port of the frame, the feed port slide plate 14 is tilted downward, a feed port slide plate lining plate 15 is fixed on the feed port slide plate 14, and the feed port slide plate lining plate 15 is fixed on the feed port slide plate 14. The plate 15 is made of wear-resistant parts, and a front side plate 8 is connected to the bottom of the feed inlet slide plate 14, and the front side plate 8 is fixedly connected to the frame 2, and the front side plate 8 is bent. Preferably, the bent front side plate 8 includes an upper inclined portion connected to the feed inlet slide plate, a vertical portion connected to the end of the upper inclined portion, and a lower inclined portion connected to the end of the vertical portion. A front side plate lining plate 9 is fixed to the inner side of the front side plate 8, and the front side plate lining plate 9 is made of wear-resistant parts. An feed inlet baffle 11 is fixed on the frame between the front side plate 8 and the rotor 5, and there is a gap between the feed inlet baffle 11 and the rotor 5. An air duct 10 is formed between the feed inlet baffle 11 and the front side plate 8 and the frame to which the front side plate 8 is fixed. The gap between the end of the feed inlet baffle 11 and the end of the front side plate 8 is the air inlet 7, and the gap between the top of the feed inlet baffle 11 and the top of the front side plate 8 is the air outlet 13. Preferably, a feed inlet baffle liner 12 is fixed on one side of the feed inlet baffle 11 close to the rotor 5, and the feed inlet baffle liner 12 is made of wear-resistant parts. The top of the feed inlet baffle liner 12 is covered on the top of the feed inlet baffle 11, and the top of the feed inlet baffle liner 12 is inclined and the inclination angle is consistent with the inclination angle of the feed inlet slide liner 15. The thickness of the feed inlet slide liner 15, the front side plate liner 9, and the feed inlet baffle liner 12 are consistent. If the thickness of the liner is different, it may cause inconsistent wear speed, resulting in a part of the liner needing to be replaced in advance. Preferably, there is a height difference a between the top of the feed inlet baffle 11 and the inclined surface of the feed inlet slide 14. The setting principle of the height difference a is: when materials moving at different speeds fall from the feed inlet slide, the height when the parabola contacts the feed inlet baffle is a, and if it is less than a, the material will enter the air outlet.

[0026] The present invention is internally sealed as a whole under the action of the impact crusher, the feed port curtain, the sealing cover and the conveyor belt. When the rotor is working, the generated working airflow flows toward the discharge port under the drive of the rotor. Since the air pressure inside the sealing cover is stable and closed, and the air duct is in an open state under the action of the air inlet and the air outlet, when the airflow runs to the discharge port, the airflow will flow to the air inlet under the drive of the rotor, flow to the air outlet along the air duct, and finally return to the feed port through the air outlet, forming an internal airflow self-circulation. Therefore, the fan effect generated by the rotor continuously circulates in the crushing chamber and gradually forms a stable working airflow.

[0027] When the impact crusher is working, the material to be crushed enters the crushing chamber of the impact crusher through the inlet curtain, and is crushed by the rotor driving the impact frame. The finished material flows out from the discharge port into the sealed cover, and is finally collected and transported by the conveyor belt. At the same time, since the crushing chamber of the impact crusher is in a completely closed state, the micro powder generated therein will be driven by the internal circulating airflow to circulate internally to prevent it from being released outside the impact crusher cavity and causing dust pollution. When the impact crusher finishes working and there is no airflow inside, the micro powder falls into the sealed cover under the influence of gravity, and is finally collected and transported by the conveyor belt and processed centrally, so that the micro powder generated by the impact crusher becomes a micro powder raw material that can be recycled.

[0028] like Figure 5 As shown, the structural principle of an embodiment of the present invention is that the material to be crushed enters the impact crusher through the inlet curtain 17. When the material passes through the air outlet 13, the material with a smaller particle size will directly fall into the air duct from the air outlet 13, affecting the crushing efficiency of the product. Therefore, at the air outlet, the position of the top plane of the inlet baffle liner 12 is lower than the position of the inlet slide liner 15, forming a certain drop a, so that the material is horizontally thrown at the air outlet 13, so that the material smoothly passes through the air outlet 13 and falls on the inlet baffle liner 12, and finally enters the rotor rotation range to be impacted and crushed, while also reducing the resistance of the material to the circulating airflow.

[0029] contrast Figure 4 and Figure 3 The airflow operation results show that the working principle of the internal airflow of the traditional impact crusher is as follows: Figure 4 As shown, because the gap between the inlet baffle and the rotor is very small, the airflow generated by the operation of the rotor is divided and cut off by the inlet baffle, so the airflow can only flow downward along the tangential direction of the rotor, forming a positive pressure area in the sealing cover, making sealing difficult, causing dust-laden airflow to be discharged to the outside, polluting the environment.

Claims

1. An internal airflow self-circulating impact crusher, comprising an impact crusher arranged on a base, an impact The crusher comprises a frame, the top of the inner side of the frame is connected with an impact frame through an impact frame adjusting device, the impact frame adjusting device runs through the top of the frame, the impact frame is hingedly connected with the corresponding impact frame adjusting device, a rotor is arranged at the lower inner side of the frame, a discharge port is arranged below the rotor, a sealing cover is arranged at the discharge port, a conveyor belt is arranged below the sealing cover, the sealing cover is closed and connected with the discharge port and the conveyor belt, a feed port curtain is arranged at the feed port of the frame, a feed port slide plate is arranged below the feed port of the frame, and the feed port slide plate is arranged tilted downward, and the characteristics are as follows: A front side plate is arranged below the feed inlet slide, the front side plate is fixedly connected to the frame, the front side plate is in a bent shape, a feed inlet baffle is arranged on the frame between the front side plate and the rotor, a gap is formed between the feed inlet baffle and the rotor, an air duct is formed between the feed inlet baffle, the front side plate and the frame fixing the front side plate, the gap between the end of the feed inlet baffle and the end of the front side plate is the air inlet, the gap between the top of the feed inlet baffle and the top of the front side plate is the air outlet, and there is a height difference a between the top of the feed inlet baffle and the inclined surface of the feed inlet slide liner.

2. The internal airflow self-circulating impact crusher according to claim 1 is characterized in that: The feed inlet slide plate is provided with a feed inlet slide plate lining plate.

3. The internal airflow self-circulating impact crusher according to claim 1 is characterized in that: A front side plate lining plate is arranged on the inner side of the front side plate.

4. The internal airflow self-circulating impact crusher according to claim 1 is characterized in that: A feed inlet baffle lining plate is arranged on one side of the feed inlet baffle plate close to the rotor.

5. The internal airflow self-circulating impact crusher according to claim 2, 3 or 4, characterized in that: The feed inlet slide plate lining, the front side plate lining and the feed inlet baffle lining are all made of wear-resistant parts and have the same thickness.

6. The internal airflow self-circulating impact crusher according to claim 4 is characterized in that: The top of the feed inlet baffle liner is covered on the top of the feed inlet baffle, and the top of the feed inlet baffle liner is inclined and the inclination angle is consistent with the inclination angle of the feed inlet slide.

7. The internal airflow self-circulating impact crusher according to claim 1 is characterized in that: The bent front side plate comprises an upper inclined portion connected to the feed inlet slide plate, a vertical portion connected to the end of the upper inclined portion, and a lower inclined portion connected to the end of the vertical portion.

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