Dustproof barrel and positive pressure dustproof system of cone crusher

Abstract

The utility model discloses a dustproof cylinder and a cone crusher positive pressure dustproof system, and belongs to the technical field of cone crushers, the dustproof cylinder is provided with an air inlet pipe communicated with an air supply device, the dustproof cylinder is internally provided with an air outlet pipe communicated with the air inlet pipe, the air outlet pipe is provided with an air outlet hole, and the air outlet hole is communicated with the air inlet pipe. The flow direction of the air passing through the air outlet hole is opposite to the lubricating cavity positioned at the lower part of the air outlet pipe; in the prior art, due to the fact that an air path and an oil path are partially overlapped, when the air pressure blown into the cone crusher is increased to improve the dustproof effect, a large amount of lubricating oil is brought out, and the brought-out lubricating oil makes contact with dust, so that the lubricating effect of a main shaft is affected. According to the technical scheme, air blown into the cone crusher can directly enter the dustproof barrel through the air inlet pipe and is blown towards the outlet in the upper end of the dustproof barrel, so that an air path and an oil path are not overlapped, and lubricating oil in the lubricating cavity is prevented from being brought out while the air pressure is increased to improve the dustproof effect.

Description

Technical Field

[0001] This utility model relates to the field of cone crusher technology, and in particular to a dustproof cylinder and a positive pressure dustproof system for cone crushers. Background Technology

[0002] Dust generated during the crushing of materials by a cone crusher can enter the lubrication chamber of the main shaft through the bottom of the moving cone. To prevent dust from contaminating the lubricating oil in the lubrication chamber, the inventors have developed a method of installing a dustproof sleeve between the moving cone and the main shaft, and installing a dustproof sealing ring at the contact point between the dustproof sleeve and the moving cone. The dustproof sealing ring prevents dust from entering the lubrication chamber. However, the dustproof sealing ring is fixed to the moving cone and rises and rotates with the moving cone. This causes wear and damage to the contact point between the dustproof sealing ring and the dustproof sleeve. If it is not replaced in time, dust can easily enter the lubrication chamber, thus contaminating the lubricating oil.

[0003] Another dust prevention method known to the inventors involves installing a positive pressure dust prevention system within the cone crusher. This system includes a dustproof cylinder positioned between the moving cone and the main shaft, and an air duct within the crusher. Clean air is blown upwards into the dustproof cylinder through the air duct to increase the internal air pressure of the cone crusher, making it higher than the external ambient pressure. This prevents external dust from entering the crusher and simultaneously expels dust generated inside, achieving effective dust prevention. However, since both the oil and air ducts enter the lubrication chamber of the main shaft via a gearbox in the transmission components, their contents overlap within the crusher. This limits the air pressure that can be applied into the crusher. Excessive pressure would carry away a large amount of lubricating oil, affecting lubrication. Conversely, insufficient pressure would compromise dust prevention, allowing dust to easily enter the lubrication chamber and contaminate the lubricating oil.

[0004] Therefore, how to design a dustproof cylinder and a positive pressure dustproof system for a cone crusher that can improve the dustproof effect by increasing the air pressure without carrying out a large amount of lubricating oil and affecting the lubrication effect is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to address the defects and deficiencies in the existing technology by providing a dustproof cylinder and a positive pressure dustproof system for a cone crusher. By allowing the air entering the cone crusher to blow directly upwards from the dustproof cylinder, the air path does not pass through the lubrication chamber. While increasing the air pressure to improve the dustproof effect, it will not carry the lubricating oil out of the lubrication chamber, thus avoiding affecting the lubrication effect.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a dustproof cylinder, which is provided with an air inlet pipe connected to an air supply device. The interior of the dustproof cylinder is provided with an air outlet pipe connected to the air inlet pipe. The air outlet pipe is provided with an air outlet hole, and the airflow after passing through the air outlet hole is opposite to the lubrication chamber located at the lower part of the air outlet pipe.

[0008] Preferably, the air intake pipe is connected to the air supply device via a flexible hose.

[0009] Preferably, a through hole is provided on the side wall of the dustproof cylinder, and the air inlet pipe passes through the through hole and is fixedly connected to the through hole.

[0010] Preferably, the air outlet pipe is an annular air pipe that surrounds the inner wall of the dustproof cylinder.

[0011] Preferably, the upper surface of the air outlet pipe is provided with the air outlet hole.

[0012] Preferably, the air outlet pipe has at least two air outlet holes, and the air outlet holes are evenly distributed along the circumference of the annular air pipe.

[0013] Preferably, the annular air pipe is fixedly connected to the inner wall of the dustproof cylinder.

[0014] Preferably, the air supply device is a mine pressure blower.

[0015] This utility model provides a positive pressure dustproof system for a cone crusher, including the aforementioned dustproof cylinder, main shaft, and lower frame. The dustproof cylinder is installed on the lower frame and sleeved on the outside of the main shaft. A first cavity is formed between the dustproof cylinder and the main shaft. The air supply device, the air inlet pipe, the air outlet pipe, and the first cavity are sequentially connected to form a cavity for air supply and flow.

[0016] The lubrication chamber is provided between the main shaft and the lower frame, and the air-supplying cavity is located at the upper part of the lubrication chamber.

[0017] Preferably, the lower frame has a second cavity inside, and a hose connected to the air inlet pipe extends through the second cavity to the outside of the cone crusher, with the end of the hose outside the cone crusher connected to the air supply device.

[0018] The present invention achieves the following technical advantages over the prior art:

[0019] This invention features an air inlet pipe on the dustproof casing and an air outlet pipe connected to the air inlet pipe inside the dustproof casing. The air outlet on the air outlet pipe faces the outlet at the upper end of the dustproof casing. This design allows air to enter the cone crusher through the air inlet pipe and then blow directly upwards from the dustproof casing at the upper part of the lubrication chamber. This prevents the air path from overlapping with the oil path, thereby increasing the positive pressure inside the cone crusher by increasing the air pressure, thus improving the dustproof effect. Furthermore, it prevents the lubricating oil in the lubrication chamber from being carried out, thus avoiding any impact on the lubrication effect of the main shaft. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the dustproof cylinder and the positive pressure dustproof system for the cone crusher disclosed in a specific embodiment of the present utility model;

[0022] Figure 2 yes Figure 1 A schematic diagram of the local structure at point A.

[0023] Among them, 1. moving cone; 2. dustproof cylinder; 3. main shaft; 4. lower frame; 5. air supply device; 6. hose; 7. second cavity; 8. air inlet pipe; 9. air outlet pipe; 10. air outlet; 11. first cavity. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 2As shown, this utility model provides a dustproof cylinder 2. The dustproof cylinder 2 is provided with an air inlet pipe 8 connected to the air supply device 5. The interior of the dustproof cylinder 2 is provided with an air outlet pipe 9 connected to the air inlet pipe 8. The air outlet pipe 9 is provided with an air outlet hole 10. The air flow after passing through the air outlet hole 10 is opposite to the lubrication chamber located at the lower part of the air outlet pipe 9. That is, the air entering the dustproof cylinder 2 through the air inlet pipe 8 blows directly upward and does not pass through the lubrication chamber located at the lower part of the air outlet pipe 9. This can improve the dustproof effect by increasing the air pressure entering the cone crusher. In addition, the lubrication chamber formed between the main shaft 3 and the lower frame 4 is located at the lower part of the air outlet pipe 9. The air blown into the cone crusher blows directly upward and does not pass through the lubrication chamber, so it will not carry out a large amount of lubricating oil and avoid affecting the lubrication effect of the main shaft 3.

[0027] The air intake pipe 8 is connected to the air supply device 5 via the flexible hose 6, and a through hole is provided on the side wall of the dustproof cylinder 2. The air intake pipe 8 passes through the through hole and is fixedly connected to the through hole. The connection method between the air intake pipe 8 and the through hole can be screwed, glued, welded, etc. In an exemplary embodiment, the air intake pipe 8 is welded to the inner wall of the through hole to improve the strength of the connection.

[0028] If the vent pipe 9 only covers a certain area of ​​the dustproof cylinder 2, it will cause uneven air pressure distribution inside the dustproof cylinder 2, which is not conducive to achieving the technical effect of dust prevention. Therefore, this application sets the vent pipe 9 as an annular air pipe that surrounds the inner wall of the dustproof cylinder 2. If the vent hole 10 is set on the side or bottom of the vent pipe 9 and a curved pipe with an upward opening is connected to the vent hole 10 so that the air blows upward, this will not only increase the complexity of the vent pipe 9 structure, but may also wear down the main shaft 3. Therefore, this application directly sets the vent hole 10 on the upper surface of the vent pipe 9 to reduce the complexity of the structure, and sets at least two vent holes 10 on the annular air pipe, and sets the vent holes 10 evenly distributed along the circumference of the annular air pipe, so as to make the air pressure distribution inside the dustproof cylinder 2 uniform and stable, and improve the dust prevention effect. The annular air tube can be integrally formed with the dustproof cylinder 2, or it can be formed separately and then assembled onto the dustproof cylinder 2. In an exemplary embodiment, the annular air tube and the dustproof cylinder 2 are two separately formed components, and the annular air tube is fixed to the inner wall of the dustproof cylinder 2 by means of screwing, bonding, welding, etc.

[0029] In existing technology, the air supply device 5 used in cone crushers is a 0.37kW fan with an air pressure of 600-900Pa and an air supply volume of 0.56m³. 3The air pressure and air volume are both relatively low, which cannot effectively prevent dust from entering the lubrication chamber inside the cone crusher during the crushing process (dust enters the upper opening of the dustproof cylinder 2 through the gap between the moving cone 1 and the dustproof cylinder 2, and then falls down along the inner cavity of the dustproof cylinder 2 to the lubrication chamber between the main shaft 3 and the lower frame 4). Therefore, this application changes the air supply device 5 to a mine pressure blower, which has an air pressure of 0.4 MPa and an air volume of 2.75 m³ / min. 3 / min, to increase the air pressure at the upper opening of the dustproof cylinder 2, so that dust will not fall into the lubrication chamber, thereby improving the dustproof effect.

[0030] This utility model also provides a positive pressure dustproof system for a cone crusher, including the aforementioned dustproof cylinder 2, main shaft 3, and lower frame 4. The dustproof cylinder 2 is installed on the lower frame 4 and sleeved on the outside of the main shaft 3. A first cavity 11 is formed between the dustproof cylinder 2 and the main shaft 3. The air supply device 5, the air inlet pipe 8, the air outlet pipe 9, and the first cavity 11 are sequentially connected to form a cavity for air supply and flow. Figure 1 The solid arrows in the diagram represent the improved airflow path of this invention, while the dashed arrows represent the airflow path in the prior art. A lubrication chamber is provided between the main shaft 3 and the lower frame 4, with the airflow chamber located at the top of the lubrication chamber. In use, the air supply device 5 is turned on, and air is blown sequentially through the inlet pipe 8, outlet pipe 9, and first cavity 11 towards the upper outlet of the dustproof cylinder 2, preventing the air from passing through the lubrication chamber. Therefore, while increasing the air pressure blown into the cone crusher to increase the positive pressure inside the cone crusher and improve the dustproof effect, it does not carry away or contaminate the lubricating oil in the lubrication chamber, ensuring the lubrication effect of the main shaft 3 and reducing the consumption and replacement frequency of lubricating oil.

[0031] The lower frame 4 has a second cavity 7 inside. A flexible hose 6, connected to the air inlet pipe 8, passes through the second cavity 7 and extends to the outside of the cone crusher. The end of the flexible hose 6 located outside the cone crusher is connected to the air supply device 5. By setting up the flexible hose 6, the impact damage between the air inlet pipe 8 and the lower frame 4 can be reduced. In addition, to avoid impact damage between the moving cone 1 and the air inlet pipe 8 when crushing materials, the minimum distance between the end of the air inlet pipe 8 away from the dustproof cylinder 2 and the inner wall of the moving cone 1 is set to be greater than the swing amount of the moving cone 1, so that the moving cone 1 will not collide with the air inlet pipe 8 when swinging.

[0032] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A dustproof cylinder, characterized in that: The dustproof cylinder is provided with an air inlet pipe connected to the air supply device. The interior of the dustproof cylinder is provided with an air outlet pipe connected to the air inlet pipe. The air outlet pipe is provided with an air outlet hole, and the airflow after passing through the air outlet hole is opposite to the lubrication chamber located at the lower part of the air outlet pipe.

2. The dustproof cylinder according to claim 1, characterized in that: The air intake pipe is connected to the air supply device via a flexible hose.

3. The dustproof cylinder according to claim 2, characterized in that: The dustproof cylinder has a through hole on its side wall, and the air inlet pipe passes through the through hole and is fixedly connected to the through hole.

4. The dustproof cylinder according to claim 3, characterized in that: The air outlet pipe is an annular air pipe that surrounds the inner wall of the dustproof cylinder.

5. The dustproof cylinder according to claim 4, characterized in that: The upper surface of the vent pipe is provided with the vent hole.

6. The dustproof cylinder according to claim 5, characterized in that: The air outlet pipe is provided with at least two air outlet holes, and the air outlet holes are evenly distributed along the circumference of the annular air pipe.

7. The dustproof cylinder according to claim 6, characterized in that: The annular air pipe is fixedly connected to the inner wall of the dustproof cylinder.

8. The dustproof cylinder according to claim 2, characterized in that: The air supply device is a mine pressure blower.

9. A positive pressure dust control system for a cone crusher, characterized in that: Includes a dustproof cylinder, a main shaft, and a lower frame as described in any one of claims 2 to 8, wherein the dustproof cylinder is installed on the lower frame and sleeved on the outside of the main shaft, a first cavity is formed between the dustproof cylinder and the main shaft, and the air supply device, the air inlet pipe, the air outlet pipe, and the first cavity are sequentially connected to form a cavity for air supply flow; The lubrication chamber is provided between the main shaft and the lower frame, and the air-supplying cavity is located at the upper part of the lubrication chamber.

10. The positive pressure dust prevention system for a cone crusher according to claim 9, characterized in that: The lower frame has a second cavity inside, and a hose connected to the air inlet pipe extends through the second cavity to the outside of the cone crusher. The end of the hose outside the cone crusher is connected to the air supply device.

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