CN220091650U - Movable crusher and dust removal mechanism thereof - Google Patents

Abstract

The utility model belongs to the technical field of crushing equipment, and provides a dust removing mechanism which is arranged on mobile crushing equipment, wherein the dust removing mechanism comprises a dust collecting pipe, a dust concentration detector and a filter, and a dust collecting opening is arranged on the dust collecting pipe; the dust concentration detector is used for detecting dust concentration, and is provided with a detection head which is arranged adjacent to the dust collection opening; the filter comprises a first valve body, an exhaust fan, a filter element and an output pipe, wherein the dust collection pipe and the output pipe are respectively connected to the filter; the first valve body is electrically connected with the dust concentration detector and opens and closes the dust collection pipe according to signals of the dust concentration detector. The utility model also provides a movable crusher with the dust removing mechanism. The utility model aims to solve the problem that dust raising parts on the mobile crushing equipment are easy to influence the operation of the mobile crushing equipment.

Description

Movable crusher and dust removal mechanism thereof

Technical Field

The utility model belongs to the technical field of crushing equipment, and particularly relates to a movable crusher and a dust removing mechanism thereof.

Background

Along with development of technology, a mobile crusher is introduced in the crushing industry, and the crushing equipment can automatically run in a crushing operation environment without people sitting on the machine to drive, can automatically run through remote control or a set route, so that the machine can automatically move and crush, and can transport crushed materials to a set destination along with the movement of the machine, thereby realizing automatic crushing and transportation operation.

In practical application, because the dust in the crushing environment is larger, especially the dust raising part on the mobile crushing equipment is easy to influence the sensing area on the machine, such as a corresponding sensor or a remote control visual field. The existing method can be adopted, namely, a water sprinkling system is arranged on a crushing site, but the water sprinkling system needs to be arranged on the site in advance, and the front engineering cost is high; moreover, the movable crushing equipment moves on site according to the operation requirement, the walking route is uncertain, and the sprinkler equipment cannot be preset. It can be seen that the way of presetting the sprinkler system in the field is less practical. Another method is to provide a sprinkler on the moving crushing plant, which sprinkler sprinkles water as the crushing plant moves. However, in some areas where water is lacking, dust suppression is not performed by using a water mist spraying means, and the water spraying device cannot play a role and has low applicability.

In this regard, how to reduce the interference of dust to the mobile crushing equipment in the working environment using the mobile crushing equipment is still a technical problem that needs to be solved in the crushing industry at present.

Disclosure of Invention

The embodiment of the utility model aims to provide a mobile crusher and a dust removing mechanism thereof, so as to solve the problem that dust raising parts on mobile crushing equipment are easy to influence the operation of the mobile crushing equipment.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a dust removal mechanism sets up on portable crushing apparatus, dust removal mechanism includes:

the dust collection pipe is provided with a dust collection opening;

the dust concentration detector is used for detecting dust concentration, a detection head is arranged on the dust concentration detector, and the detection head is arranged adjacent to the dust collection opening;

the filter comprises a first valve body, an exhaust fan, a filter element and an output pipe, wherein the dust collection pipe and the output pipe are respectively connected to the filter, the first valve body is arranged on the dust collection pipe, and the filter element and the exhaust fan are arranged in the filter; the first valve body is electrically connected with the dust concentration detector, and the dust collection pipe is opened and closed according to signals of the dust concentration detector.

The dust removing mechanism on the movable crusher has the beneficial effects that: compared with the prior art, the dust removing mechanism has a simple structure, and comprises the dust collecting pipe and the filter, wherein the dust collecting pipe can be selectively arranged on dust raising parts of the mobile crusher, such as a feed inlet, a feed outlet and the like of the mobile crusher. The filter is internally provided with an exhaust fan, dust on the dust raising part is sucked by the exhaust fan through the dust suction pipe, so that the dust on the dust raising part is effectively removed, and the influence of the dust on the operation of the movable crushing equipment is reduced.

The filter is internally provided with a filter element, the exhaust fan generates suction force to suck dust from the dust suction pipe and discharge the dust from the output pipe after the dust is filtered by the filter element, so that the sucked dust is filtered, and fresh air is discharged. Wherein, for being matched with the mobile crusher, the consumption rate of the filter element is reduced. The dust removing mechanism further comprises a dust concentration detector, wherein the dust concentration detector is provided with a detecting head, and the detecting head is arranged adjacent to a dust collecting opening of the dust collecting pipe so as to detect the dust concentration of a dust raising part where the dust collecting pipe is located. The dust concentration detector is electrically connected with the first valve body, and the first valve body is used for controlling the dust suction pipe to be opened and closed according to detection signals of the dust concentration detector, so that the aim of opening according to needs is fulfilled, the filtering effect of the filter element is prevented from weakening or failing easily, the operation of stopping the movable crusher to replace or clean the filter element is reduced, and the running time of the movable crusher is effectively prolonged.

The filter is improved in structure, an air inlet cavity and an air outlet cavity which are mutually separated are formed in the filter, the air inlet cavity is communicated with the dust suction pipe, the air outlet cavity is communicated with the output pipe, and the filter element is arranged between the air inlet cavity and the air outlet cavity. Therefore, the inner cavity of the filter is divided into two cavities of the air inlet cavity and the air outlet cavity, and the filter element is arranged between the two cavities. The dust-containing air enters the air inlet cavity through the dust collection pipe, is changed into fresh air after being filtered by the filter element, and is discharged from the output pipe through the air outlet cavity, so that the filtering effect is achieved.

Optionally, the filter is further provided with a compressed air container, an air blowing pipe and a second valve body for opening the compressed air container, the air blowing pipe is arranged in an air inlet cavity of the filter, and the air blowing pipe is communicated with the compressed air container and is arranged towards the filter element; the second valve body is arranged at the joint of the air blowing pipe and the compressed air container. Therefore, the compressed air container is arranged on the filter, the container can compress and store air, the compressed air is released after the second valve body is opened, and the air output from the container is output to the filter element by utilizing the air blowing pipe, so that dust adsorbed on the filter element is removed, automatic dust removal of the filter element is realized, the operation frequency of replacing or disassembling the filter element is effectively reduced, and the operation period of the mobile crusher is prolonged.

The structure of the dust collection pipe is improved, the dust collection mechanism comprises a plurality of dust collection pipes, and the dust collection pipes are respectively connected to the filter; the dust collection pipes are connected to one end of the filter, the output pipe is connected to the other end of the filter, and the exhaust fan is arranged in the air outlet cavity and close to the output pipe. On the one hand, dust suction pipes can be respectively arranged on each dust raising part of the mobile crusher to suck dust, so that the influence of the dust on the operation of the mobile crusher is effectively reduced. On the other hand, the air in the air outlet cavity is fresh air filtered by the filter element, so that the exhaust fan is arranged in the air outlet cavity, and the influence of dust on the normal operation of the exhaust fan is reduced.

Optionally, the filter is provided with a plurality of connectors, and each connector is provided with the first valve body; the dust collection pipes are hose bodies and are respectively connected to the connecting heads. On the one hand, the dust absorption pipe is a hose body, so that the hose body can be bent or turned and the like, and the dust absorption pipe is flexibly arranged on the mobile crusher, and the installation suitability of the dust absorption pipe is improved. On the other hand, set up the connector on the filter, make first valve body can accept on the connector, realize opening and close control to the dust absorption pipe, ensure the leakproofness effectively.

The structure of the filter is improved, a dust collecting box is arranged at the bottom of the filter, and the dust collecting box is positioned below the filter element. The dust collecting box can adopt a box body with an upper opening, and dust or particles falling from the filter element are intercepted by utilizing a dust collecting box pocket so as to remove the dust in the filter.

Optionally, the bottom of the filter is further provided with a slot for installing the dust box, and the dust box is installed in the filter through the slot. Let dust box detachably set up on the filter, simple structure, the dust box can slide into in the filter along the slot to make dust box and filter core automatic alignment in upper and lower direction, realize quick installation, improve installation effectiveness.

Optionally, the dust collection pipe further comprises a guide cover, and the guide cover is arranged on the dust collection opening. The air guide sleeve is used for corresponding orientation setting, so that dust collection angle requirements of dust raising parts are met, the dust collection range is enlarged, and the dust collection efficiency is improved.

The utility model also provides a movable crusher, which comprises the dust removing mechanism, wherein a dust suction pipe of the dust removing mechanism can be selectively arranged on dust raising parts of the movable crusher, such as a discharging opening, a feeding opening and the like on the movable crusher, so that the influence of dust raising on the parts on the control field of view or on sensing parts, such as a distance sensor and the like, on the movable crusher near the parts is avoided, and the normal operation of the movable crusher is effectively ensured.

Optionally, a fixed pipe is arranged on the movable crusher, and a fixed hole is formed in the fixed pipe; the dust collection pipe is provided with a connecting pipe, and the connecting pipe is provided with a connecting hole; the connecting pipe is sleeved with the fixing pipe, so that the connecting hole corresponds to the fixing hole in position, and a fastener such as a screw is installed and fixed in a penetrating manner. Therefore, the dust suction pipe has a very simple installation structure and is easy to implement. The dust collection pipe can be fixed on the mobile crusher, the fixing effect is ensured, and the extending direction of the dust collection pipe can be fixed, so that the directional effect is achieved at the same time, and the dust collection opening on the dust collection pipe is locked.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a mobile crusher according to an embodiment of the present utility model;

fig. 2 is a partially enlarged view of a portion of the mobile crusher provided with a dust removing mechanism according to an embodiment of the present utility model;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

FIG. 4 is a schematic view of the internal structure of a filter according to an embodiment of the present utility model;

FIG. 5 is an enlarged schematic view of portion B of FIG. 2;

fig. 6 is an enlarged schematic view of a portion C of fig. 3.

Wherein, each reference sign in the figure:

1-a dust collection pipe; 11-a dust collection port; 12-a diversion cover; 13-connecting pipes; 131-connecting holes;

2-a dust concentration detector; 21-a probe;

3-a filter; 31-a first valve body; 32-exhaust fan; 33-a filter element; 34-output tube; 35-an air inlet cavity; 36-an air outlet cavity; 37-compressed air container; 38-an air blowing pipe; 39-a second valve body;

4-a dust collection box; 41-pulling the hand;

5-a connector;

6-fixing the tube; 61-fixing holes.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The movable crusher and the dust removing mechanism provided by the embodiment of the utility model are described in detail. Referring to fig. 1, 2 and 3, a mobile crusher includes a dust removing mechanism of the present utility model, which includes a dust collecting pipe 1, a dust concentration detector 2 and a filter 3. The dust suction pipe 1 of the dust removal mechanism can be selectively arranged on dust raising parts of the mobile crusher, such as a discharging opening, a feeding opening and the like on the mobile crusher. The dust suction pipe 1 is provided with a dust suction opening 11 which can be opened at the extending end of the dust suction pipe 1.

As shown in fig. 2, the dust concentration detector 2 is configured to detect dust concentration, and a detector head 21 is provided on the dust concentration detector 2. The probe 21 is arranged on the outer surface of the mobile crusher, and the probe 21 is arranged adjacent to the dust suction opening 11 on the dust suction pipe 1. Therefore, the dust concentration detector 2 can detect specific parts (such as dust raising parts) on the mobile crusher, the detection range is accurate, and the detection accuracy is improved.

Referring to fig. 2 and 4, the filter 3 includes a first valve body 31, an exhaust fan 32, a filter element 33, and an output pipe 34, the dust suction pipe 1 and the output pipe 34 are respectively connected to the filter 3, the first valve body 31 is disposed on the dust suction pipe 1, and the filter element 33 and the exhaust fan 32 are disposed inside the filter 3. The first valve body 31 is electrically connected with the dust concentration detector 2, and opens and closes the dust collection pipe 1 according to a detection signal of the dust concentration detector 2. Specifically, when a certain concentration value is reached, the first valve body 31 is triggered to start, and the dust collection pipe 1 is opened or closed, so that the aim of opening according to the requirement is fulfilled, and the filter effect of the filter element 33 is prevented from being easily weakened or disabled.

Here, the function of the dust concentration detector 2 is utilized, and the function of the dust concentration detector 2 is not improved by the present utility model. The connection between the dust concentration detector 2 and the first valve body 31 and the corresponding trigger control are also conventional control means.

Compared with the prior art, the dust removing mechanism on the mobile crusher provided by the embodiment of the utility model has a simple structure, and comprises the dust collecting pipe 1 and the filter 3, wherein the dust collecting pipe 1 can be selectively arranged on dust raising parts of the mobile crusher, such as a feed inlet, a discharge opening and the like of the mobile crusher. The filter 3 is provided with the exhaust fan 32, and dust on the dust raising part is sucked by the exhaust fan 32 through the dust suction pipe 1, so that the dust on the dust raising part is effectively removed, and the influence of the dust on the operation of the mobile crushing equipment is reduced.

The filter 3 has a filter element 33 therein, and the suction fan 32 generates suction force to suck dust from the dust suction pipe 1, and the dust is filtered by the filter element 33 and discharged from the output pipe 34, thereby filtering the sucked dust and discharging fresh air.

Wherein for use with a mobile crusher, the rate of consumption of the filter element 33 is reduced. The dust removing mechanism further comprises a dust concentration detector 2, the dust concentration detector 2 is provided with a detection head 21, and the detection head 21 is arranged adjacent to the dust collection opening 11 of the dust collection pipe 1 so as to detect the dust concentration of a dust raising part where the dust collection pipe 1 is located. The dust concentration detector 2 is electrically connected with the first valve body 31, and the first valve body 31 performs opening and closing control on the dust suction pipe 1 according to a detection signal of the dust concentration detector 2, so that the aim of opening according to needs is fulfilled, the filter effect of the filter element 33 is prevented from weakening or failing easily, the operation of stopping the movable crusher to replace or clean the filter element 33 is reduced, and the running time of the movable crusher is effectively prolonged.

In the embodiment of the present utility model, referring to fig. 4, an air inlet chamber 35 and an air outlet chamber 36 are separated from each other in the filter 3, the air inlet chamber 35 is communicated with the dust suction tube 1, the air outlet chamber 36 is communicated with the output tube 34, and the filter element 33 is disposed between the air inlet chamber 35 and the air outlet chamber 36. In this way, the inner space of the filter 3 is divided into two chambers, an inlet chamber 35 and an outlet chamber 36, between which the filter cartridge 33 is arranged. The dust-containing air enters the air inlet cavity 35 through the dust collection pipe 1, is changed into fresh air after being filtered by the filter element 33, and is discharged from the output pipe 34 through the air outlet cavity 36, so that the filtering effect is achieved, and dust at the dust raising part of the mobile crusher is effectively removed.

When excessive dust on the filter element 33 is present after a period of operation, this can lead to a reduced or ineffective filtering effect. In another embodiment of the present utility model, referring to fig. 4, the filter 3 is further provided with a compressed air container 37, a blowing pipe 38, and a second valve body 39, the blowing pipe 38 is disposed in the air inlet chamber 35 of the filter 3, and the blowing pipe 38 is communicated with the compressed air container 37 and disposed towards the filter element 33. The second valve body 39 is provided at the junction of the air blowing pipe 38 and the compressed air container 37, and controls the start and stop of the compressed air container 37.

In this way, a compressed air container 37 is provided on the filter 3, which container is capable of compressing and storing air. After the second valve body 39 is opened, the compressed air in the container is released, and the air output from the container is output onto the filter element 33 by utilizing the air blowing pipe 38, so that dust adsorbed on the filter element 33 is removed, automatic dust removal of the filter element 33 is realized, the operation frequency of replacing or disassembling the filter element 33 is effectively reduced, and the operation period of the mobile crusher is further prolonged.

Referring to fig. 4, a dust collecting box 4 is disposed at the bottom of the filter 3, and the dust collecting box 4 may be a box body with an upper opening, so that the dust collecting box 4 is located below the filter element 33, and dust or particles falling from the filter element 33 are trapped by the dust collecting box 4, so as to remove the dust in the filter 3.

In this embodiment, at least three filter elements 33 are disposed in the filter 3, and the three filter elements 33 are suspended between the air inlet chamber 35 and the air outlet chamber 36 of the filter 3, so as to improve the filtering effect. In practical applications, the dust remaining from the filter element 33 will easily fall downward. Here, dust boxes 4 having the same number as the filter elements 33 are provided at the bottom of the filter 3, and the three dust boxes 4 are located below the three filter elements 33 and vertically correspond to each other so as to trap dust, particulate matter, and the like falling from the respective filter elements 33.

Preferably, the bottom of the filter 3 is also provided with a slot (not shown) for mounting the dust box 4, and the dust box 4 is mounted in the filter 3 through the slot (not shown). Let dust box 4 detachably set up on filter 3, simple structure, dust box 4 can slide into filter 3 along the slot (not shown) to make dust box 4 and filter core 33 automatic alignment in the upper and lower direction, realize quick installation, improve installation effectiveness.

In this embodiment, as shown in fig. 4, the dust collecting box 4 may preferably be a box body with a handle 41 at a side, and when the dust collecting box 4 is unloaded, the dust collecting box 4 may be pulled out from a slot (not shown) at the bottom of the filter 3 like a drawer, so as to facilitate cleaning of the dust collecting box 4 and reloading the dust collecting box back to the filter 3 for reuse.

In the embodiment of the present utility model, referring to fig. 2, 4 and 5, the dust removing mechanism includes a plurality of dust collecting pipes 1, and the dust collecting pipes 1 are respectively connected to the filter 3. Therefore, the dust suction pipes 1 can be respectively arranged on the dust raising parts of the mobile crusher to suck dust, so that the influence of the dust on the operation of the mobile crusher is effectively reduced.

As shown in fig. 4, the dust collection tubes 1 are connected to one end of the filter 3, the output tube 34 is connected to the other end of the filter 3, and the exhaust fan 32 is disposed in the air outlet chamber 36 of the filter 3 and is disposed near the output tube 34. In this embodiment, the blower may be preferably used as the blower 32, and the blower 32 is preferably disposed at the junction between the output pipe 34 and the filter 3. Because the air in the air outlet cavity 36 is fresh air filtered by the filter element 33, the exhaust fan 32 is arranged in the air outlet cavity 36, which is beneficial to reducing the influence of dust on the normal operation of the exhaust fan 32.

In addition, the exhaust fan 32 is arranged close to the output pipe 34, so that fresh air can be accurately conveyed to the output pipe 34 and discharged out of the filter 3, and the air fluidity inside the filter 3 is effectively improved.

In the present embodiment, referring to fig. 2, 4 and 5, the filter 3 is provided with a plurality of connectors 5, and each connector 5 is provided with a first valve body 31. The plurality of suction pipes 1 are preferably flexible pipe bodies and are connected to the respective connectors 5.

Therefore, the dust collection pipe 1 is preferably a hose body, so that the hose body can be bent or turned, and the flexible installation on the mobile crusher is facilitated, and the installation suitability of the dust collection pipe 1 is further improved. In addition, the connector 5 is provided on the filter 3, so that the first valve body 31 can be accommodated on the connector 5, thereby realizing the opening and closing control of the dust suction pipe 1 and effectively ensuring the tightness.

In the embodiment of the present utility model, the first valve body 31 and/or the second valve body 39 described above may preferably be an electric butterfly valve. By utilizing the performance of the electric butterfly valve, the stable opening and closing control of the air flow action of the dust collection pipe 1 is ensured, and the working stability of the dust collection mechanism is further improved.

In an embodiment of the present utility model, referring to fig. 3, the suction pipe 1 further includes a guide cover 12, and the guide cover 12 is disposed on the suction opening 11 of the suction pipe 1. The air guide sleeve 12 is used for corresponding orientation setting, so that dust collection angle requirements of dust raising parts are met, dust collection range is enlarged, and dust collection efficiency is improved.

In another embodiment of the present utility model, referring to fig. 6, for the installation structure of the dust suction pipe 1 of the dust suppression mechanism, a fixed pipe 6 is provided on the mobile crusher, and a fixing hole 61 is provided on the fixed pipe 6. In cooperation, the dust suction pipe 1 is provided with a connecting pipe 13, and the connecting pipe 13 is provided with a connecting hole 131. In this way, the connection pipe 13 and the fixing pipe 6 can be coupled to each other so that the connection hole 131 corresponds to the position of the fixing hole 61, so that a fastening member such as a screw or the like (not shown) is installed to be fastened therethrough. The dust suction pipe 1 is very simple in installation structure and easy to implement. The dust collection pipe 1 can be fixed on the mobile crusher, the fixing effect is ensured, the extending direction of the dust collection pipe 1 can be fixed, the orientation effect is achieved, and the dust collection opening 11 on the dust collection pipe 1 is locked.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The utility model provides a dust removal mechanism sets up on portable crushing apparatus, its characterized in that, dust removal mechanism includes:

the dust collection pipe is provided with a dust collection opening;

the dust concentration detector is used for detecting dust concentration, a detection head is arranged on the dust concentration detector, and the detection head is arranged adjacent to the dust collection opening;

the filter comprises a first valve body, an exhaust fan, a filter element and an output pipe, wherein the dust collection pipe and the output pipe are respectively connected to the filter, the first valve body is arranged on the dust collection pipe, and the filter element and the exhaust fan are arranged in the filter; the first valve body is electrically connected with the dust concentration detector, and the dust collection pipe is opened and closed according to signals of the dust concentration detector.

2. The dust removal mechanism of claim 1, wherein: the filter is characterized in that an air inlet cavity and an air outlet cavity which are mutually separated are arranged in the filter, the air inlet cavity is communicated with the dust collection pipe, the air outlet cavity is communicated with the output pipe, and the filter element is arranged between the air inlet cavity and the air outlet cavity.

3. The dust removal mechanism of claim 2, wherein: the filter is also provided with a compressed air container, an air blowing pipe and a second valve body for opening the compressed air container, the air blowing pipe is arranged in an air inlet cavity of the filter, and the air blowing pipe is communicated with the compressed air container and is arranged towards the filter element; the second valve body is arranged at the joint of the air blowing pipe and the compressed air container.

4. The dust removal mechanism of claim 2, wherein: the dust removing mechanism comprises a plurality of dust collecting pipes which are respectively connected to the filter; the dust collection pipes are connected to one end of the filter, the output pipe is connected to the other end of the filter, and the exhaust fan is arranged in the air outlet cavity and close to the output pipe.

5. The dust removal mechanism of claim 4, wherein: the filter is provided with a plurality of connectors, and each connector is provided with the first valve body; the dust collection pipes are hose bodies and are respectively connected to the connecting heads.

6. The dust removal mechanism of claim 1, wherein: the bottom of the filter is provided with a dust collecting box, and the dust collecting box is positioned below the filter element.

7. The dust removal mechanism of claim 6, wherein: the bottom of the filter is also provided with a slot for installing the dust box, and the dust box is installed in the filter through the slot.

8. The dust removing mechanism according to any one of claims 1 to 7, wherein: the dust collection pipe further comprises a guide cover, and the guide cover is arranged on the dust collection opening.

9. A mobile crusher, characterized in that: a dust extraction mechanism comprising any one of claims 1 to 8, the dust extraction pipe of the dust extraction mechanism being selectively positionable on a dust raising portion of the mobile crusher.

10. The mobile crusher of claim 9, wherein: the movable crusher is provided with a fixed pipe, and the fixed pipe is provided with a fixed hole; the dust collection pipe is provided with a connecting pipe, and the connecting pipe is provided with a connecting hole; the connecting pipe is sleeved with the fixing pipe, so that the positions of the connecting hole and the fixing hole correspond.