Split dust collection system for cone crusher

Abstract

The present invention provides a split dust collection system for a cone crusher, which utilizes a top dust collection hood and a middle dust collection hood to collect dust on the upper and lower parts of the cone crusher respectively. This split structure is conducive to avoiding the lateral airflow introduced into the interior of the cone crusher by a fan, so that the dust in the upper and lower cavities can be fully and effectively captured. At the same time, the middle dust collection hood is installed at the fracture between the upper and lower parts, which saves space and effectively avoids the dust inside the cone crusher from escaping. At the same time, a circular suction method is adopted to effectively avoid the circular suction airflow of the upper fan, enhance the suction force of the negative pressure airflow, and even out the wind speed. The system is more suitable for cone crushers and has higher dust suction efficiency and better effect.

Description

Technical Field

[0001] The invention relates to the field of construction waste treatment, in particular to a split dust collection system for a cone crusher. Background Art

[0002] Cone crusher is a common crushing equipment in the construction waste treatment industry. It is mainly used to crush construction waste of medium hardness and medium brittleness. The material is crushed into the required particle size through the impact of the rotating cone crushing cavity and the hammer head. A lot of dust will be generated during the use of the cone crusher. Therefore, the cone crusher must be equipped with a dust capture device to capture dust synchronously when the cone crusher is working and reduce the dust in the working environment to below the standard concentration.

[0003] The entrance of the cone crusher is set at the top. The dust collection device currently equipped in the industry is a dust collection hood directly suspended above the entrance. There is a certain space between the collection hood and the entrance. Construction waste is put in from the top entrance and crushed and transported out from the bottom exit. At the same time, the collection hood absorbs the dust dispersed at the entrance and inside the equipment. However, a fan is installed in the middle of the cone crusher. The fan blows air into the equipment, which seriously interferes with the dust suction airflow of the top dust collection hood. In addition, there is a part of the disconnection between the bottom of the cone crusher fan and the bottom of the cone crusher, which will also greatly weaken the negative pressure suction airflow at the top. Therefore, the existing dust collection device for cone crushers is inefficient. To address this problem, it is necessary to redesign a more suitable dust collection system to avoid the dust collection defects caused by the fan and the fracture of the cone crusher. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the airflow generated by the fan and fracture of the current cone crusher seriously affects the dust collection effect of the top dust collection cover, and to propose a split dust collection system for the cone crusher.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A split dust collection system for a cone crusher, the cone crusher comprising an upper part and a lower part, the bottom end of the cavity of the upper part is an open structure, the top end of the cavity of the lower part is a circular opening structure, the bottom end of the upper part and the top end of the lower part are disconnected and a distance is left between them, a fan is provided near the bottom end of the upper part, and the fan is used to supply air to the interior of the cone crusher;

[0007] The split dust collection system comprises a top dust collection hood, a middle dust collection hood, a dust collection pipeline and a negative pressure device; the negative pressure device is connected to the dust collection pipeline, the dust collection pipeline is connected to the top dust collection hood and the middle dust collection hood, the top dust collection hood is installed at the top entrance of the cone crusher and is used to capture dust in the upper part, and the middle dust collection hood is installed at the gap between the upper part and the lower part and is used to capture internal dust of the lower part and the bottom end of the upper part;

[0008] The middle dust collecting hood includes a connecting cavity and an annular suction hood, the top of the connecting cavity is connected to the bottom of the upper cavity, the bottom of the connecting cavity is connected to the top of the annular suction hood, and the bottom of the annular suction hood is connected to the top of the lower cavity; the annular suction hood is a hollow arc-shaped hood convex outward, and an annular gap is provided on the inner ring side of the annular suction hood facing the inside of the cone crusher. A middle dust outlet is also provided on the annular suction hood, and the dust collection pipeline is connected to the middle dust outlet; the negative pressure device generates negative pressure, and under the action of the negative pressure, dust is sucked into the annular suction hood through the annular gap, and the dust in the annular suction hood enters the dust collection pipeline from the middle dust outlet.

[0009] Preferably, the connecting cavity is detachably connected to the bottom end of the upper cavity, and the bottom end of the annular suction cover is detachably connected to the top end of the lower cavity.

[0010] Preferably, a movable frame is fixedly mounted outside the middle dust collecting hood, a slide rail is provided on the cone crusher, and the movable frame is located on the slide rail; when the connecting cavity and the upper part and the annular suction hood and the lower part are all in a disassembled state, the middle dust collecting hood moves along the slide rail with the movable frame.

[0011] Preferably, the top dust collecting hood is movably mounted at the top inlet of the cone crusher.

[0012] Preferably, the top dust collecting hood comprises a top dust inlet and a top dust outlet, the top dust inlet is located at the bottom of the dust collecting hood, and the top dust outlet is located at the side of the dust collecting hood.

[0013] Preferably, the annular gap is an elongated opening extending circumferentially, and dust in the lower part of the cone crusher and the connecting cavity is circumferentially sucked into the annular suction hood by the annular gap.

[0014] Preferably, the further away the annular suction hood is from the middle dust outlet, the smaller the cross-sectional area is, and the closer the annular suction hood is to the middle dust outlet, the larger the cross-sectional area is.

[0015] Preferably, the shape of the annular gap is the same as the projection shape of the annular suction cover on the inner ring side wall, that is, the height of the part of the annular gap farther away from the middle dust outlet is smaller, and the height of the part of the annular gap closer to the middle dust outlet is larger.

[0016] Preferably, a baffle is provided inside the annular suction hood, and the baffle is located in front of the middle dust outlet. The baffle is used to block the middle dust outlet and disturb the airflow, and the airflow bypasses the baffle and enters and exits the annular suction hood from the middle dust outlet.

[0017] Preferably, the annular suction hood is an axisymmetric structure, and the central dust outlet is located on the axis of symmetry.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. According to the structural characteristics of the cone crusher, a split dust collection system is designed to collect dust on the upper and lower parts of the cone crusher respectively. The top dust collection hood is only used to capture dust on the upper part of the cone crusher, while the middle dust collection hood is only used to capture dust below the fan inside the cone crusher. The upper and lower parts work separately and will not be disturbed by the fan.

[0020] 2. The middle dust collection hood is installed at the fracture below the cone crusher fan, connecting the separated upper and lower parts. On the one hand, it can seal the fracture part to prevent the external airflow from interfering with the negative pressure airflow of dust collection and prevent the internal dust from escaping into the atmosphere from the fracture. On the other hand, it can avoid the airflow injected into the cone crusher by the fan, efficiently capture the dust in the cavity below the cone crusher fan, and greatly improve the dust collection effect.

[0021] 3. The annular suction hood is a hollow hood that bulges outward. It performs annular suction along the circumference of the cone crusher cavity through the annular gap on the inner ring side. It can effectively avoid the airflow generated by the fan and evenly absorb the dust in the lower cavity, with a better dust capture effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall installation structure of a split dust collection system for a cone crusher;

[0024] Figure 2 for Figure 1 A magnified view of the installation structure details of the middle dust collection hood;

[0025] Figure 3 It is a schematic diagram of the side view installation structure of a split dust collection system for a cone crusher;

[0026] Figure 4 Schematic diagram of the split dust collection system of the cone crusher with the middle dust collection hood removed;

[0027] Figure 5 It is a schematic diagram of the overall structure of the middle dust collection hood;

[0028] Figure 6 It is a top view of the middle dust collection hood;

[0029] Figure 7 for Figure 6 Cross-sectional view of the middle dust collection hood in the AA direction.

[0030] Among them, the cone crusher 100, the upper part 101, the lower part 102, the fan 103; the top dust collecting hood 1, the middle dust collecting hood 2, the dust collection pipeline 3, the negative pressure device 4; the connecting cavity 21, the annular suction hood 22, the annular gap 221, the middle dust outlet 222, the moving frame 23, the slide rail 24, the baffle 223, the top dust inlet 11, and the top dust outlet 12. DETAILED DESCRIPTION

[0031] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0033] Please refer to Figure 1-Figure 7 A split dust collection system for a cone crusher. The cone crusher 100 includes an upper part 101 and a lower part 102. The bottom end of the cavity of the upper part 101 is an open structure, and the top end of the cavity of the lower part 102 is a circular opening structure. The bottom end of the upper part 101 and the top end of the lower part 102 are disconnected and a distance is left between them. A fan 103 is provided near the bottom end of the upper part 101. The fan 103 is used to supply air to the interior of the cone crusher 100.

[0034] The shape of the bottom of the cavity of the upper part 101 is not fixed. It can be rectangular or circular according to the external structure of the cone crusher 100. The fan 103 is installed at the bottom of the upper part 101 to supply air horizontally from the outside to the inside of the cone crusher 100, especially to the inside of the cavity of the upper part 101. The cavity between the lower part 102 and the upper part 101 is not directly connected, but there is a fracture, and the external atmosphere can directly enter the inside of the cone cavity through the fracture. The current dust collection method in the industry, as described in the background technology, is usually to build a dust collection hood directly suspended on the top. However, whether it is the lateral wind sent into the cone crusher 100 by the fan 103, or the connection with the atmosphere at the break between the upper part 101 and the lower part 102, it will seriously interfere with the negative pressure airflow generated by the dust collection hood at the top entrance for collecting dust, which is not conducive to dust collection, especially the dust collection efficiency near the fan and in the cavity of the lower part 102 is extremely poor, and a large amount of dust escapes into the atmosphere and pollutes the working environment.

[0035] like Figure 1 As shown, the split dust collection system for a cone crusher protected by the present invention comprises a top dust collection hood 1, a middle dust collection hood 2, a dust collection pipeline 3 and a negative pressure device 4; the negative pressure device 4 is connected to the dust collection pipeline 3, the dust collection pipeline 3 connects the top dust collection hood 1 and the middle dust collection hood 2, the top dust collection hood 1 is installed at the top entrance of the cone crusher 100 and is used to capture the dust in the upper part 101, and the middle dust collection hood 2 is installed in the gap between the upper part 101 and the lower part 102 and is used to capture the internal dust of the lower part 102 and the bottom end of the upper part 101.

[0036] That is, the present invention adopts a split structure, and dust collecting hoods are respectively arranged at the top entrance of the cone crusher 100 and at the fracture between the upper part 101 and the lower part 102, so that dust is sucked and collected respectively at the upper and lower parts, and the middle dust collecting hood 2 directly blocks the fracture between the upper part 101 and the lower part 102, so as to prevent the interior of the cavity of the cone crusher 100 from being directly connected to the atmosphere, so that the cavity of the upper part 101 becomes a relatively more closed space, and solves the problem of interference of the suction airflow of the top dust collecting hood 1 at the fracture, and the suction airflow in the cavity of the upper part 101 is stronger, and the dust collecting effect is better; the top of the cavity of the lower part 102 also forms a relatively more closed space because the middle dust collecting hood 2 is installed, which is beneficial to the dust collection of the middle dust collecting hood 2 in the cavity of the lower part 102. Since whether the upper part 101 and the lower part 102 need to capture dust is determined by whether the cone crusher 100 is working, the dust collection of the two is carried out synchronously. The top dust collection hood 1 and the middle dust collection hood 2 are both connected to the dust collection pipeline 3, and the dust collection pipeline 3 is connected to the external negative pressure device 4. The negative pressure device 4 can be a dust removal device. The fan of the dust removal device itself generates a negative pressure suction airflow, which enters the top dust collection hood 1 and the middle dust collection hood 2 along the dust collection pipeline 3. The dust in the cone crusher 100 is sucked and captured and then enters the dust removal device along the dust collection pipeline 3 for treatment. The dust removal equipment filters and collects the dust. The dust content in the filtered exhaust gas meets the emission standards and is thus discharged into the atmosphere.

[0037] like Figure 2 , Figure 5-Figure 7 As shown, the middle dust collecting hood 2 includes a connecting cavity 21 and an annular suction hood 22, the top of the connecting cavity 21 is connected to the bottom of the cavity of the upper part 101, the bottom of the connecting cavity 21 is connected to the top of the annular suction hood 22, and the bottom of the annular suction hood 22 is connected to the top of the cavity of the lower part 102; the annular suction hood 22 is a hollow arc-shaped hood convex outwardly, and an annular gap 221 is provided on the inner ring side of the annular suction hood 22 facing the inside of the cone crusher 100, and a middle dust outlet 222 is also provided on the annular suction hood 22, and the dust collecting pipeline 3 is connected to the middle dust outlet 222; the negative pressure device 4 generates a negative pressure airflow and enters the middle dust collecting hood 2 through the dust collecting pipeline 3, and the dust is sucked into the middle dust collecting hood 2 and enters the annular suction hood 22 through the annular gap 221, and the dust in the annular suction hood 22 enters the dust collecting pipeline from the middle dust outlet 222.

[0038] Since the installation position of the middle dust collecting hood 2 is close to the fan 103, the wind sent into the cone crusher 100 by the fan 103 will directly affect the position where the middle dust collecting hood 2 is located. The present invention arranges an annular suction hood 22 at the circular opening position at the top of the cavity 102 of the lower part of the cone crusher 100, and an annular gap 221 is provided on the inner side of the annular suction hood 22, which can suck the dust from the side around the circumference. This dust suction and capture method will not be affected by the horizontal air supply of the upper fan 103, so that the dust in the cavity 102 of the lower part of the cone crusher 100 can also be well captured. In addition, a connecting cavity 21 is provided above the annular suction hood 22. The connecting cavity 21 is mainly used to connect the annular suction hood 22 and the upper part 101 of the cone crusher 100 to avoid the existence of a break, thereby preventing dust from escaping, so that all the dust at the junction of the upper part 101 and the lower part 102 can enter the middle dust collection hood 2 and then be absorbed by the annular suction hood 22, effectively preventing dust from escaping.

[0039] The connection between the top dust outlet 12 and the dust collection pipeline 3, and between the middle dust outlet 222 and the dust collection pipeline 3 are both detachable. The pipeline quick-release switch in the current technology can be directly selected and installed at the connection between the dust outlet and the pipeline to quickly achieve a fixed connection between the top dust collection hood 1 and the middle dust collection hood 2 and the dust collection pipeline 3.

[0040] The dust collection pipeline 3 can be a pipeline network composed of a main pipeline and a branch pipeline. The top dust collection hood 1 and the middle dust collection hood 2 are respectively connected to different branch pipelines. The dust is collected in the main pipeline and then sent to the external negative pressure device 4, such as the dust removal equipment, for centralized treatment. In this scheme, as long as the dust removal equipment and the cone crusher 100 are started and operated synchronously, it can be ensured that the top dust collection hood 1 and the middle dust collection hood 2 can collect dust synchronously.

[0041] The top dust collection hood 1 and the middle dust collection hood 2 can also be connected to different dust collection pipelines 3 and controlled by different negative pressure devices 4 respectively. In this scheme, the negative pressure airflows of the top dust collection device and the middle dust collection device are independent of each other, and whether to work synchronously can be set according to actual needs.

[0042] The same negative pressure device 4 can also be connected to the top dust collecting hoods 1 and the middle dust collecting hoods 2 of multiple cone crushers 100 for unified control, thereby processing the dust of multiple cone crushers 100 at the same time.

[0043] In one embodiment, the connecting cavity 21 is detachably connected to the bottom end of the cavity of the upper part 101, and the bottom end of the ring suction cover 22 is detachably connected to the top end of the cavity of the lower part 102. That is, the middle dust collection cover 2 can be completely disassembled from the cone crusher 100, and can be easily repaired and replaced.

[0044] In a further embodiment, if Figure 1 and Figure 4 As shown, a movable frame 23 is fixedly installed outside the middle dust collecting hood 2, a slide rail 24 is provided on the cone crusher 100, and the movable frame 23 is located on the slide rail 24; when the connecting cavity 21 and the upper part 101 and the annular suction hood 22 and the lower part 102 are all in a disassembled state, the middle dust collecting hood 2 moves along the slide rail 24 with the movable frame 23. The top of the middle dust collecting hood 2, i.e., the top of the connecting cavity 21, matches the size and shape of the bottom opening of the upper part 101 of the cone crusher 100, and a fixed structure is provided at the connection between the top of the middle dust collecting hood 2 and the bottom of the upper part 101 of the cone crusher 100, such as a mutually matching interlocking slide rail 24 extending along the moving direction, or a fixed buckle and other structures, and a sealing strip can also be provided at the joint; and the bottom of the middle dust collecting hood 2, i.e., the bottom of the annular suction hood 22, matches the size and shape of the top opening of the lower part 102 of the cone crusher 100, and a fixed structure and a sealing strip are provided between the two. The middle dust collecting hood 2 can be moved to the middle of the cone crusher 100 and fixed to achieve dust collection in the middle and lower part 102, and can also be moved to the side of the cone crusher 100 to facilitate workers to check and repair; the movement saves time and effort, and is quick and convenient.

[0045] In one embodiment, the top dust collecting hood 1 is movably installed at the top entrance of the cone crusher 100. The top dust collecting hood 1 can be installed with a pulley at the bottom, and a slide rail 24 can be installed at the top of the cone crusher 100. The top dust collecting hood 1 is installed on the slide rail 24 and moves along the slide rail 24 through the pulley. The top dust collecting hood can also be easily and quickly controlled to cover the top entrance of the cone crusher 100 or move to the side of the top entrance, which is convenient for maintenance and saves time and effort.

[0046] In a preferred embodiment, the top dust collecting hood 1 includes a top dust inlet 11 and a top dust outlet 12, wherein the top dust inlet 11 is located at the bottom of the dust collecting hood, and the top dust outlet 12 is located at the side of the dust collecting hood. The top dust outlet 12 is located at the side of the dust collecting hood, so the negative pressure airflow used to collect dust in the top dust collecting hood 1 is horizontal suction, while the currently commonly used top dust collecting device directly performs longitudinal suction from the top, and the fan 103 of the upper part 101 supplies air horizontally from the outside to the inside of the cone crusher 100. Therefore, the side suction method of the top dust collecting hood 1 in the present invention is compared with the top suction. When sucking and collecting dust, it can be free from the interference of the horizontal airflow at the fan 103 to a certain extent. The horizontal airflow in the top dust collecting hood 1 and the horizontal airflow at the fan 103 may also be connected to form a Z-shaped or C-shaped airflow, which promotes the improvement of dust collection efficiency.

[0047] In one embodiment, if Figure 5 , Figure 6 As shown, the annular gap 221 is an elongated opening extending in an annular direction, and the dust in the lower part 102 of the cone crusher 100 and the connecting cavity 21 is sucked into the annular suction cover 22 in an annular direction by the annular gap 221. On the one hand, the annular suction cover 22 is close to the fan 103, and there is lateral airflow interference caused by the fan 103 above. On the other hand, the lower part of the annular suction cover 22 is a cylindrical cavity, so the annular suction cover 22 itself is set in an annular shape, and the annular gap 221 is a dust collection port extending along the annular shape and facing the center of the circle to avoid the interference of lateral airflow, and at the same time, it can capture dust more comprehensively. At the same time, the annular gap 221 is an elongated opening. When the negative pressure airflow passes through the annular gap 221, the area is reduced, so the dust suction capacity is enhanced, so that a better dust collection effect can be obtained.

[0048] In one embodiment, if Figure 5-Figure 7 As shown, the further away the annular suction hood 22 is from the middle dust outlet 222, the smaller the cross-sectional area is, and the closer the annular suction hood 22 is to the middle dust outlet 222, the larger the cross-sectional area is. Since the negative pressure airflow is smaller at a position farther from the middle dust outlet 222 and the negative pressure airflow is larger at a position closer to the middle dust outlet 222, the above structural design of the annular suction hood 22 can make the volume of the part with small negative pressure airflow smaller and the volume of the part with large negative pressure airflow larger, so as to achieve uniform wind speed, equal pressure and equal volume in the annular suction hood 22, balance the pressure resistance of the negative pressure airflow, and obtain a more uniform dust capture effect.

[0049] In a more preferred embodiment, the shape of the annular gap 221 is the same as the projection shape of the annular suction hood 22 on the inner ring side wall, that is, the height of the part of the annular gap 221 that is farther away from the middle dust outlet 222 is smaller, and the height of the part of the annular gap 221 that is closer to the middle dust outlet 222 is larger. This structural design makes the area of ​​the annular gap 221 smaller at the part with small negative pressure airflow, and the area of ​​the annular gap 221 larger at the part with large negative pressure airflow, so that the suction force of the negative pressure suction airflow at each position of the annular suction hood 22 can be basically uniform, thereby obtaining a better dust collection effect.

[0050] In a more preferred embodiment, Figure 7 As shown, a baffle 223 is provided inside the annular suction hood 22, and the baffle 223 is located in front of the middle dust outlet 222. The baffle 223 is used to block the middle dust outlet 222 and disturb the flow, and the airflow bypasses the baffle 223 and enters and exits the annular suction hood 22 from the middle dust outlet 222. The purpose of the baffle 223 is to block the middle dust outlet 222 and prevent the suction airflow from directly entering the annular suction hood 22, and to prevent the suction airflow in the annular suction hood 22 from being too concentrated at the middle dust outlet 222, so that the suction airflow at each part of the annular suction hood 22 is as equal in pressure and quantity as possible, so that the pressure resistance in the annular suction hood 22 is balanced.

[0051] In a preferred embodiment, the annular suction hood 22 is an axisymmetric structure, and the middle dust outlet 222 is located on the axis of symmetry, which further ensures the pressure resistance balance in the annular suction hood 22.

[0052] As described above, the split dust collection system for cone crusher protected by the present invention utilizes a top dust collection hood and a middle dust collection hood to collect dust on the upper and lower parts of the cone crusher respectively. This split structure is conducive to avoiding the lateral airflow introduced into the interior of the cone crusher by the fan, so that the dust in the upper and lower cavities can be fully and effectively captured. At the same time, the middle dust collection hood is installed at the fracture between the upper and lower parts, which saves space and effectively avoids the dust inside the cone crusher from escaping. At the same time, the circular suction method is adopted to effectively avoid the circular suction airflow of the upper fan, enhance the suction force of the negative pressure airflow, and even out the wind speed. It is more suitable for cone crusher, with higher dust suction efficiency and better effect.

[0053] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A split dust collection system for a cone crusher, characterized in that: The cone crusher comprises an upper part and a lower part, the bottom end of the cavity of the upper part is an open structure, the top end of the cavity of the lower part is a circular opening structure, the bottom end of the upper part and the top end of the lower part are disconnected and a distance is left between them, and a fan is provided near the bottom end of the upper part, and the fan is used to supply air to the interior of the cone crusher; The split dust collection system comprises a top dust collection hood, a middle dust collection hood, a dust collection pipeline and a negative pressure device; the negative pressure device is connected to the dust collection pipeline, the dust collection pipeline is connected to the top dust collection hood and the middle dust collection hood, the top dust collection hood is installed at the top entrance of the cone crusher and is used to capture dust in the upper part, and the middle dust collection hood is installed at the gap between the upper part and the lower part and is used to capture internal dust of the lower part and the bottom end of the upper part; The middle dust collecting hood comprises a connecting cavity and an annular suction hood, the top of the connecting cavity is connected to the bottom end of the upper cavity, the bottom end of the connecting cavity is connected to the top of the annular suction hood, and the bottom end of the annular suction hood is connected to the top of the lower cavity; the annular suction hood is a hollow arc-shaped hood convex outward in an annular direction, an annular gap is provided on the inner ring side of the annular suction hood facing the inside of the cone crusher, a middle dust outlet is also provided on the annular suction hood, and the dust collecting pipeline is connected to the middle dust outlet; a negative pressure device generates negative pressure, and under the action of the negative pressure, dust is sucked into the annular suction hood through the annular gap, and the dust in the annular suction hood enters the dust collecting pipeline from the middle dust outlet, the further away the annular suction hood is from the middle dust outlet, the smaller the cross-sectional area is, and the closer the annular suction hood is to the middle dust outlet, the larger the cross-sectional area is; The connection between the connecting cavity and the bottom end of the upper cavity, and between the bottom end of the annular suction hood and the top end of the lower cavity are all detachably connected. A movable frame is also fixedly installed outside the middle dust collecting hood. The cone crusher is provided with a slide rail, and the movable frame is located on the slide rail. The middle dust collecting hood is moved to the middle of the cone crusher and fixed to realize dust collection in the middle and lower parts, or is moved to the side of the cone crusher to facilitate workers to inspect and repair.

2. The split dust collection system for a cone crusher according to claim 1, characterized in that: The top dust collecting hood is movably mounted at the top inlet of the cone crusher.

3. The split dust collection system for a cone crusher according to claim 1, characterized in that: The top dust collecting hood comprises a top dust inlet and a top dust outlet, wherein the top dust inlet is located at the bottom of the dust collecting hood, and the top dust outlet is located at the side of the dust collecting hood.

4. The split dust collection system for a cone crusher according to claim 1, characterized in that: The annular gap is an elongated opening extending in a circumferential direction, and dust in the lower part of the cone crusher and the connecting cavity is sucked into the annular suction hood in a circumferential direction by the annular gap.

5. The split dust collection system for a cone crusher according to claim 1, characterized in that: The shape of the annular gap is the same as the projection shape of the annular suction cover on the inner ring side wall, that is, the height of the part of the annular gap farther away from the middle dust outlet is smaller, and the height of the part of the annular gap closer to the middle dust outlet is larger.

6. The split dust collection system for a cone crusher according to claim 1, characterized in that: A baffle is provided inside the annular suction hood, and the baffle is located in front of the middle dust outlet. The baffle is used to block the middle dust outlet and disturb the flow, and the airflow bypasses the baffle and enters and exits the annular suction hood from the middle dust outlet.

7. The split dust collection system for a cone crusher according to claim 1, characterized in that: The annular suction hood is an axisymmetric structure, and the middle dust outlet is located on the axis of symmetry.

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