CN107890943B

CN107890943B - Movable crushing station

Info

Publication number: CN107890943B
Application number: CN201711468026.9A
Authority: CN
Inventors: 李军; 杨海; 张勇
Original assignee: Jiangsu XCMG Construction Machinery Institute Co Ltd
Current assignee: Jiangsu XCMG Construction Machinery Institute Co Ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2023-10-03
Anticipated expiration: 2037-12-29
Also published as: CN107890943A

Abstract

The utility model discloses a mobile crushing station, comprising: the crushing mechanism is used for receiving and crushing the materials to be crushed; the screening mechanism is used for receiving the materials crushed by the crushing mechanism and screening the crushed materials into a first material with the size being more than the set screening size and a second material with the size being less than the set screening size; the material returning conveying mechanism is used for receiving and conveying the first material; the material output mechanism is used for receiving and outputting a second material; the position of the returning material conveying mechanism is adjustably arranged so that the movable crushing station has a closed-loop working mode and an open-loop working mode; in a closed-loop working mode, the material returning conveying mechanism conveys the received first material to the crushing mechanism for crushing again; in an open loop working mode, the material returning and conveying mechanism directly outputs the first material received by the material returning and conveying mechanism. The movable crushing station has different working modes, and can realize the production of various materials with different specifications under the different working modes.

Description

Movable crushing station

Technical Field

The utility model relates to engineering machinery, in particular to a movable crushing station.

Background

The movable crushing station is an important device for ore processing and recycling construction waste, and is widely applied to occasions such as mineral, gravel aggregate crushing, construction waste crushing and the like. The movable crushing station can be mainly applied to crushing and screening production of medium and fine crushing materials according to different grading modes of the crushing and screening production line, is widely applied to the crushing and screening production line of small mountain exposed tailings and sand aggregates, and has the advantages of low investment, high return rate, current production, sales and the like. Most of the existing movable crushing station equipment has single functions, the connection mode of the modules cannot be changed, and various functions such as deformation collocation cannot be generated, so that the variety of the produced finished product materials is relatively single.

The utility model of Chinese patent number CN 205815898U discloses a movable cone crushing station, which comprises a travelling device, a frame, a feeding conveyor belt, a receiving hopper, a crusher, a discharging hopper, a main conveyor belt, a vibrating screen mounting frame, a discharging conveyor belt, a transverse conveyor belt, a returning hopper, an oil cylinder, a pull rod, a power box, a protecting cover and an electric box. The movable cone type crushing station can realize the flexible movement of the crushing station, but only one layout mode of the movable cone type crushing station cannot realize various deformation connection and cannot produce various materials with different specifications.

Disclosure of Invention

The utility model aims to provide a movable crushing station which has different working modes and can realize the production of materials with different specifications under the different working modes.

The utility model discloses a mobile crushing station, comprising:

the crushing mechanism is used for receiving and crushing the materials to be crushed;

the screening mechanism is used for receiving the materials crushed by the crushing mechanism and screening the crushed materials into a first material with the size being more than the set screening size and a second material with the size being less than the set screening size;

the returning material conveying mechanism is used for receiving and conveying the first material;

the material output mechanism is used for receiving and outputting the second material;

the position of the returning conveying mechanism is adjustably arranged so that the movable crushing station has a closed-loop working mode and an open-loop working mode; in the closed-loop working mode, the material returning and conveying mechanism conveys the received first material to the crushing mechanism for crushing again; in the open loop working mode, the material returning and conveying mechanism directly outputs the received first material.

Further, the movable crushing station comprises a frame, and the returning conveying mechanism comprises a first connecting part, a second connecting part, a third connecting part and a fourth connecting part which are detachably connected with the frame; in the closed-loop working mode, the first connecting part and the second connecting part are detachably connected with the frame; in the open-loop working mode, the third connecting part and the fourth connecting part are detachably connected with the frame.

Further, the return conveying mechanism changes an angle relative to the frame in the switching process of the closed-loop working mode and the open-loop working mode.

Further, in the closed-loop working mode, the first connecting part, the second connecting part and the frame are respectively connected through pin shafts; in the open-loop working mode, the third connecting part is connected with the frame through a inhaul cable, and the fourth connecting part is connected with the frame in a hanging way through a hanging hook and a hanging rod.

Further, the third connecting part is located between the fourth connecting part and the material output end of the returning conveying mechanism.

Further, in the open loop working mode, the fourth connecting portion is hung with the frame through a hanging rod, the movable crushing station comprises a returning material conveying mechanism support, the returning material conveying mechanism support is connected with the fourth connecting portion of the returning material conveying mechanism, the hanging rod is arranged on the returning material conveying mechanism support, the hanging rod is arranged on the frame and is provided with an opening, and the returning material conveying mechanism is hung on the hanging rod through the hanging rod along the opening of the hanging rod.

Further, the number of the hooks is at least two.

Further, the returning charge conveying mechanism support comprises a groove-shaped base, two ends of the hanging rod are connected to two side walls of the groove-shaped base, the bottom of the returning charge conveying mechanism is supported on the bottom wall of the groove-shaped base, and the fourth connecting portion is connected with the groove-shaped base.

Further, the groove-shaped base is connected with the fourth connecting portion through a pin shaft or a bolt.

Further, in the open loop working mode, the third connecting portion is connected with the frame through a pull rope, the pull rope is a Y-shaped pull rope, the Y-shaped pull rope is provided with three connecting points, wherein two connecting points of the three connecting points are respectively connected to two sides of the returning material conveying mechanism, and the other connecting point of the three connecting points is connected with the frame.

Further, any one of the two connection points is connected with the returning conveying mechanism through a pin shaft, a spherical hinge or a hook, and the other connection point is connected with the frame through a pin shaft, a spherical hinge or a hook.

Further, the movable crushing station further comprises an intermediate conveying mechanism, wherein the intermediate conveying mechanism is used for receiving crushed materials output by the crushing mechanism and conveying the crushed materials to the screening mechanism in an open-loop working mode and a closed-loop working mode, and the screening mechanism and the material output mechanism are detachably connected with the frame so that the movable crushing station also has a mixed working mode; in the mixed working mode, the screening mechanism and the material output mechanism are detached from the frame, and the intermediate conveying mechanism directly outputs the received crushed materials.

Further, the mobile crushing station further comprises a screening bracket detachably connected with the frame, and the screening mechanism and the material output mechanism are connected to the screening bracket in the open loop working mode and the closed loop working mode.

Further, the returning charge conveying mechanism comprises a first connecting part, a second connecting part, a third connecting part and a fourth connecting part which are used for being detachably connected with the frame; in the closed-loop working mode, the first connecting part and the second connecting part are detachably connected with the screening bracket; in the open loop mode of operation, the third connection portion and the fourth connection portion are detachably connected with the screening frame.

Further, the movable crushing station comprises a screening mechanism supporting frame, and the screening mechanism and the material output mechanism are arranged on the screening mechanism supporting frame; the screening bracket comprises a supporting beam of a supporting rod mechanism and a pull rod; the upper part of the supporting rod mechanism is connected with the screening mechanism supporting frame through the pull rod, and the screening mechanism supporting frame is also connected with the lower part of the supporting rod mechanism; the first end of the supporting beam is connected to the lower part of the supporting rod mechanism, and the second end of the supporting beam and the upper part of the supporting rod mechanism are detachably connected to the frame.

Further, the supporting rod mechanism comprises a telescopic mechanism, and when the supporting rod mechanism is connected to the frame, the telescopic mechanism can stretch and abut against a supporting surface of the movable crushing station.

Based on the movable crushing station provided by the utility model, the movable crushing station can work in a closed-loop working mode and an open-loop working mode. In a closed-loop working mode, the material returning conveying mechanism conveys the first material with the size larger than the set screening size back to the crushing mechanism for crushing again, so that the materials to be crushed can be completely crushed into materials with the size smaller than the set screening size and output; under the open-loop working mode, the material returning conveying mechanism directly outputs the first material with the size larger than the set screening size, and meanwhile, the material outputting mechanism outputs the second material, and the movable crushing station can directly output the first material and the second material with different sizes.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic view of a forward structure of a mobile crushing station according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the rearward construction of the mobile crushing station of FIG. 1;

FIG. 3 is a schematic view of a partial enlarged structure of the portion I shown in FIG. 1;

FIG. 4 is a schematic view of the partial enlarged structure of the portion III shown in FIG. 2;

FIG. 5 is a partially enlarged schematic view of the portion IV shown in FIG. 2;

FIG. 6 is a partially enlarged schematic view of the structure of the V portion shown in FIG. 2;

FIG. 7 is a schematic view of the mobile crushing station of FIG. 1 in an open loop mode of operation;

FIG. 8 is a schematic view of the part II shown in FIG. 7 in an enlarged partial structure;

FIG. 9 is a schematic view of the part of section II shown in FIG. 7 after being disassembled;

FIG. 10 is a schematic view of the mobile crushing station of FIG. 1 in a hybrid mode of operation;

fig. 11 is a schematic view of the mobile crushing station of fig. 1 in a disassembly process when switching to a hybrid operation mode.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1, the mobile crushing station in this embodiment includes: chassis 1, frame 2, crushing mechanism 5, screening mechanism 10, material output mechanism 11, returning charge conveying mechanism 4.

The chassis 1 is used for walking, braking, etc. of the mobile crushing station, and for carrying a frame 2 of the mobile crushing station and other mechanisms during walking. The running gear of the chassis 1 of the mobile crushing station may be of wheeled or other form, and in some embodiments may be a crawler running gear.

The crushing mechanism 5 is for receiving and crushing the material to be crushed placed therein. Outputting the crushed materials after the crushing is completed. The crushing mechanism 5 is in some embodiments a cone crusher.

In some embodiments, a feeding mechanism 3 is arranged on the mobile crushing station, and the feeding mechanism 3 conveys the material to be crushed to the crushing mechanism 5 for crushing. The mobile crushing station may also be provided without the feeding means 3 and with the material to be crushed being added directly to the crushing means 5 by means of an external feeding device.

The screening mechanism 10 is used for receiving the crushed materials of the crushing mechanism 5 and screening the crushed materials into a first material with a size larger than a set screening size and a second material with a size smaller than the set screening size.

In some embodiments, the intermediate transport mechanism 8 is connected to the discharge port of the crushing mechanism 5 or is disposed below the discharge port of the crushing mechanism 5 to receive the crushed material, and then the crushed material is conveyed to the screening mechanism 10 to be received by the screening mechanism; it is also possible to place the screening means 10 directly under the discharge opening of the crushing means 5 or directly in connection with the discharge opening of the crushing means 5, so that the screening means 10 receives the crushed material.

The screening means 10 screens the crushed material it receives, the set screening size being determined by the construction of the screening means 10. The screening mechanism 10 may screen the crushed material it receives into a first material of a size above a set screening size and a second material of a size less than the set screening size. For example, when the screening device has a mesh structure, the screening size is set by the mesh size of the mesh structure.

The material output mechanism 11 is configured to receive the second material screened by the screening mechanism 10 and output the second material to the outside.

The return conveying mechanism 4 is used for receiving and conveying the first material. The first material screened by the screening means 10 can be transferred to the return conveyor 4 by means of the transfer means 12 of the mobile crushing station. The first material may also be conveyed onto the return conveying mechanism 4 by arranging the return conveying mechanism 4 directly below the sieving mechanism 10.

The return conveying mechanism 4 is adjustably positioned so that the mobile crushing station has a closed loop mode of operation and an open loop mode of operation. For example, the return conveying mechanism 4 may be rotated, moved, or a combination of rotation and movement to change its position.

In the closed-loop operating mode, the return conveying mechanism 4 conveys the first material received by it after screening back into the crushing mechanism 5, which is crushed again and screened again by the crushing mechanism 5 and the screening mechanism 10. In the closed-loop working mode, the movable crushing station can crush all materials to be crushed into second materials to be output.

In the open-loop working mode, the first material received by the material returning conveying mechanism 4 is not returned to the crushing mechanism 5 and is directly output to the outside. In the open loop working mode, the material output mechanism 11 outputs a second material; the return conveying mechanism 4 outputs a first material. In the open-loop working mode, the movable crushing station can output two materials with different sizes, namely a first material and a second material.

As shown in fig. 7, the mobile crushing station comprises a power plant 7. The power device 7 is used for providing power for the chassis of the movable crushing station, the crushing mechanism 5, the screening mechanism 10, the feeding mechanism 3, the intermediate conveying mechanism 8, the material output mechanism 11, the material returning conveying mechanism 4, the transfer mechanism 12 and other material conveying devices.

In some embodiments, the intermediate transport mechanism 8, the screening mechanism 10, the material output mechanism 11, the return conveying mechanism 4, or the transfer mechanism 12 may comprise a belt conveyor mechanism.

In some embodiments, the return conveying mechanism 4 includes a first connection, a second connection, a third connection, and a fourth connection that are detachably connected with the frame 2. In a closed-loop working mode, the first connecting part and the second connecting part are detachably connected with the frame 2; in the open-loop operating mode, the third and fourth connection portions are detachably connected to the frame 2.

Each of the first, second, third and fourth connecting portions may be directly connected to the frame 2, or may be connected to other components connected to the frame 2.

In the closed-loop working mode, the first connecting part and the second connecting part can be detachably connected with the frame 2 through various connecting modes, for example, the first connecting part and the second connecting part can be connected through a threaded connecting structure, a clamping structure, a pin shaft and other connecting structures. As shown in fig. 4 and 6, the first connecting portion is connected to the first return support bar 20 through a first pin 19, and the second connecting portion is connected to the second return support bar 15 through a second pin 16. The first returning support rod 20 and the second returning support rod 15 are connected with the frame 2, and can be detachably connected with the frame 2 or integrally arranged with the frame 2. The pin shaft is adopted to connect the returning charge conveying mechanism 4 and the frame 2, so that the disassembly of the returning charge conveying mechanism 4 and the frame 2 is facilitated, and the connecting structure is simple and convenient and quick to disassemble and assemble. In some embodiments, the first connecting portion includes a first hinge support 18, and the second connecting portion includes a second hinge support 17, where the hinge support is configured to enable fine adjustment of the position of the return conveying mechanism 4 during installation and removal, which is beneficial for convenient and quick removal and connection of the return conveying mechanism.

In some embodiments, the return conveying mechanism 4 changes an angle relative to the frame 2 during the closed loop mode of operation and the open loop mode of operation. As shown in fig. 1 and 7, the return conveying mechanism is nearly parallel to the frame 2 in the closed-loop operation mode to form an angle of nearly 90 degrees with the frame 2 in the open-loop operation mode.

In the open-loop operation mode, the third connection portion and the frame 2 may be detachably connected, and the fourth connection portion and the frame 2 may be detachably connected in various manners, for example, may be connected by a connection structure such as a threaded connection structure, a clamping structure, a pin shaft, and the like.

In some embodiments, in the open loop operation mode, the third connection portion is connected to the frame 2 through a cable 6, and the fourth connection portion is hooked to the frame 2 through a hook 23 and a hanging rod 22.

The fourth connecting part is positioned at the bottom of the returning conveying mechanism 4, and the third connecting part is positioned between the fourth connecting part and the material output end of the returning conveying mechanism 4.

The cable 6 connecting the third connecting portion with the frame 2 may have a plurality of connection points, and both ends of the cable 6 may be connected with the frame 2 and the third connecting portion through one or more connection points, respectively. In some embodiments, the pull cable 6 is a Y-shaped cable having three connection points. Wherein, two of the three connection points are respectively connected with two sides of the returning material conveying mechanism 4. Another one of the three connection points of the guy cable 6 is connected with the frame 2. The Y-shaped rope has simple structure and is favorable for connection stability. The cable is adopted to connect the returning charge conveying mechanism 4, so that the returning charge conveying mechanism 4 can be disassembled and assembled, and the movable crushing station can be switched under different working modes.

In some embodiments, each of the two connection points of the Y-cord to the return conveying mechanism 4 may be connected to the third connection of the return conveying mechanism 4 by a ball joint, pin or hook. In this embodiment, the third connecting portion includes lifting lugs disposed on two sides of the middle portion of the return conveying mechanism 4. The Y-shaped rope is connected with the lifting lug through a pin shaft 21. The other connecting point of the Y-shaped inhaul cable connected with the frame 2 can be connected with the frame 2 through a hook, a spherical hinge or a pin shaft. Wherein, when another tie point of cable 6 adopts spherical hinge with frame 2, can make things convenient for returning charge conveying mechanism 4 rotation and removal.

In some embodiments, as shown in fig. 8 and 9, the mobile crushing station further comprises a return conveying mechanism bracket 13, the return conveying mechanism bracket 13 being connected to the fourth connection of the return conveying mechanism 4. The fourth connecting part is positioned at the bottom of the returning conveying mechanism 4. The hanging rod 23 is arranged on the return conveying mechanism bracket 13. The hooks 22 may be provided on the frame 2 or on a member connected to the frame 2. In this embodiment the hanger 22 is attached to a support beam 24 attached to the frame 2. The number of the hooks 22 is two, the opening is upward, and the returning material conveying mechanism 4 is hung on the hooks 22 along the opening of the hooks 22 through hanging rods 23. The number of hooks 22 is two or more, which is beneficial to limiting the rotation of the bottom of the return conveying mechanism 4. The returning charge conveying mechanism 4 is connected to the frame 2 through the inhaul cable 6 and the hook hanging rod adopting two hooks, so that the returning charge conveying mechanism 4 can keep stable in position in an open loop working mode.

In some embodiments, as shown in fig. 9, the return conveying mechanism bracket 13 includes a groove-shaped base. Both ends of the hanging rod 23 are connected to both side walls of the groove-shaped base. The shape of the groove and the bottom of the return conveying mechanism 4 matched with the groove are supported on the bottom wall of the groove-shaped base. In some embodiments, the bottom of the return conveying mechanism 4 is form-fitted with a groove-like base.

In this embodiment, the groove-shaped base is hinged to a fourth connecting portion located at the bottom of the return conveying mechanism 4 or is connected through a bolt. The arrangement can lead the bottom of the returning charge conveying mechanism 4 to be more flexible and convenient when being hung with the frame 2.

The intermediate transport mechanism 8 is arranged to receive crushed material output by the crushing mechanism and to deliver crushed material from the crushing mechanism 5 to the screening mechanism in an open loop mode of operation and in a closed loop mode of operation. The screening mechanism 10 and the material output mechanism 11 are detachably connected with the frame 2, so that the movable crushing station also has a mixed working mode. In the mixed working mode, the screening mechanism 10 and the material output mechanism 11 are detached from the frame 2, and the intermediate conveyor 8 mechanism directly outputs the crushed materials received by the intermediate conveyor. In the mixed working mode, the intermediate conveying mechanism 8 directly outputs the materials crushed by the crushing mechanism 5, so that the output of the materials before crushing and screening can be realized, and the third materials are output to the outside.

In some embodiments, the mobile crushing station further comprises a screening stand, which is detachably connected to the frame 2. The screening bracket is used for bearing and connecting the screening mechanism 10 and the material output mechanism 11. The detachable connection of the screening mechanism 10 and the material output mechanism 11 with the frame 2 is realized by the detachable connection of the screening bracket with the frame 11. By providing a screening carrier, it is possible to realise that the screening means 10 and the material take-off means 11 and the transfer means 12 are not directly connected to the frame 2 but that the screening means 10, the material take-off means 11 and the transfer means 12 are placed on the screening carrier and that the screening carrier is detachably connected to the frame 2. Therefore, the screening mechanism 10, the material output mechanism 11 or the transfer mechanism 12 and the like are integrally detached and installed with the frame 2 through the detachable connection of the screening bracket and the frame 2, and the convenient and quick switching between the mixed working mode and other working modes of the movable crushing station is facilitated.

In some embodiments, the first and second connection portions are detachably connected to the sieving bracket, respectively, in a closed loop mode of operation. In an open loop working mode, the third connecting part and the fourth connecting part are detachably connected with the screening bracket respectively. The returning charge conveying mechanism 4 is indirectly connected with the frame 2 through the screening bracket, so that the returning charge conveying mechanism 4 and the screening bracket are integrally detached and installed with the frame 2, and the convenient and quick switching of the mixed working mode is further facilitated.

In some embodiments, as shown in fig. 11, the mobile crushing station includes a screening mechanism support 28, and the screening mechanism 10 and the material output mechanism 11 are disposed on the screening mechanism support 28. The provision of the screening means support 28 facilitates the mounting and positioning of the screening means 10, the material output means 11. The screening media comprises a support bar means 9, support beams 24 and tie rods. The upper part of the supporting rod mechanism 9 is connected with a screening mechanism supporting frame 28 through a pull rod. A screening mechanism support 28 is connected to the lower part of the support bar means 9. The first end of the support beam 24 is connected to the lower portion of the support bar mechanism 9, and the second end of the support beam 24 and the upper portion of the support bar mechanism 9 are detachably connected to the vehicle frame 2. In some embodiments, the upper portion of the support bar mechanism 9 is hinged to a hinge seat 26 of the frame 2 via a hinge seat 27, and the support beam 24 is hinged to a connection plate 25 of the frame 2 via a pin 14.

In some embodiments, the lower portion of the support rod mechanism 9 includes a telescoping mechanism that can be extended to the ground or the like for supporting a support surface of the mobile crushing station when the support rod mechanism 9 is detachably connected to the frame 2. When it is necessary to switch to the hybrid mode of operation, the telescopic mechanism can be extended to the ground and kept stable, and then the support bar mechanism 9 and the support beam 24 can be detached. The telescopic structure is beneficial to conveniently and stably realizing the disassembly and the installation processes of the screening bracket.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.

Claims

1. A mobile crushing station comprising:

a crushing mechanism (5) for receiving and crushing a material to be crushed;

the screening mechanism (10) is used for receiving the crushed materials of the crushing mechanism (5) and screening the crushed materials into a first material with the size being more than a set screening size and a second material with the size being less than the set screening size;

a return conveying mechanism (4) for receiving and conveying the first material;

a material output mechanism (11) for receiving and outputting the second material;

the device is characterized in that the position of the returning material conveying mechanism (4) is adjustably arranged so that the movable crushing station has a closed-loop working mode and an open-loop working mode; in the closed-loop working mode, the material returning and conveying mechanism (4) conveys the received first material to the crushing mechanism (5) for crushing again; in the open-loop working mode, the material returning and conveying mechanism (4) directly outputs the first material received by the material returning and conveying mechanism; the movable crushing station comprises a frame (2), and the returning conveying mechanism (4) comprises a first connecting part, a second connecting part, a third connecting part and a fourth connecting part which are detachably connected with the frame (2); in the closed-loop working mode, the first connecting part and the second connecting part are detachably connected with the frame (2); in the open-loop working mode, the third connecting part and the fourth connecting part are detachably connected with the frame (2); in the open-loop working mode, the fourth connecting part is connected with the frame (2) in a hanging way through a hanging hook (22) and a hanging rod (23), the movable crushing station comprises a returning conveying mechanism support (13), the returning conveying mechanism support (13) is connected to the fourth connecting part of the returning conveying mechanism (4), the hanging rod (23) is arranged on the returning conveying mechanism support (13), the hanging hook (22) is arranged on the frame (2) and is provided with an opening, and the returning conveying mechanism (4) is connected to the hanging hook (22) along the opening of the hanging hook (22) through the hanging rod (23); the material returning and conveying mechanism support (13) comprises a groove-shaped base, two ends of the hanging rod (23) are connected to two side walls of the groove-shaped base, the bottom of the material returning and conveying mechanism (4) is supported on the bottom wall of the groove-shaped base, and the fourth connecting part is connected with the groove-shaped base; the movable crushing station further comprises an intermediate conveying mechanism (8), wherein the intermediate conveying mechanism (8) is used for receiving crushed materials output by the crushing mechanism (5) and conveying the crushed materials to the screening mechanism (10) in an open-loop working mode and a closed-loop working mode, and the screening mechanism (10) and the material output mechanism (11) are detachably connected with the frame (2) so that the movable crushing station also has a mixed working mode; in the mixed working mode, the screening mechanism (10) and the material output mechanism (11) are detached from the frame (2), the intermediate conveying mechanism (8) directly outputs the crushed materials received by the intermediate conveying mechanism, and the number of hooks (22) is at least two.

2. A mobile crushing station according to claim 1, characterized in that the return conveying mechanism (4) is varied by an angle relative to the frame (2) during switching between closed-loop and open-loop operation modes.

3. A mobile crushing station according to claim 1, characterized in that in the closed-loop operating mode the first connection is connected to the frame (2) by means of a first pin (19) and the second connection is connected to the frame (2) by means of a second pin (16); in the open-loop working mode, the third connecting part is connected with the frame (2) through a guy cable (6), and the fourth connecting part is connected with the frame (2) in a hanging way through a hanging hook (22) and a hanging rod (23).

4. A mobile crushing station according to claim 2, characterized in that the third connection is located between the fourth connection and the material output of the return conveying mechanism (4).

5. The mobile crushing station of claim 1 wherein the fluted base is connected to the fourth connection by a pin or bolt.

6. A mobile crushing station according to claim 1, characterized in that in the open-loop operating mode the third connection is connected to the frame (2) by means of a cable (6), the cable (6) being a Y-cable having three connection points, wherein two of the three connection points are connected to both sides of the return conveyor (4) respectively, and another of the three connection points is connected to the frame (2).

7. A mobile crushing station according to claim 6, characterized in that either one of the two connection points is connected to the return conveying mechanism (4) by means of a pin, a ball joint or a hook, and the other connection point is connected to the frame (2) by means of a pin, a ball joint or a hook.

8. A mobile crushing station according to claim 7, characterized in that the mobile crushing station further comprises a screening holder, which is detachably connected to the frame (2), to which screening holder the screening means (10) and the material output means (11) are connected in the open-loop and closed-loop operation mode.

9. A mobile crushing station according to claim 8, characterized in that the return conveying mechanism (4) comprises a first connection, a second connection, a third connection and a fourth connection for detachable connection with the frame (2); in the closed-loop working mode, the first connecting part and the second connecting part are detachably connected with the screening bracket; in the open loop mode of operation, the third connection portion and the fourth connection portion are detachably connected with the screening frame.

10. A mobile crushing station according to claim 9, characterized in that the mobile crushing station comprises a screening mechanism support (28), the screening mechanism (10) and the material output mechanism (11) being arranged on the screening mechanism support (28); the screening bracket comprises a supporting rod mechanism (9), a supporting beam (24) and a pull rod; the upper part of the supporting rod mechanism (9) is connected with the screening mechanism supporting frame (28) through the pull rod, and the screening mechanism supporting frame (28) is also connected with the lower part of the supporting rod mechanism (9); the first end of the supporting beam (24) is connected to the lower part of the supporting rod mechanism (9), and the second end of the supporting beam (24) and the upper part of the supporting rod mechanism (9) are detachably connected to the frame (2).

11. A mobile crushing station according to claim 10, characterized in that the support rod means (9) comprises a telescopic means, which telescopic means are extendable and abut against a support surface of the mobile crushing station when the support rod means (9) are connected to the frame (2).