Mobile crushing and screening plant and lifting method thereof

Abstract

The present application relates to the technical field of engineering machinery, and discloses a mobile crushing and screening station, wherein the mobile crushing and screening station comprises a vehicle frame, a vibrating screen device, a first lifting device and a second lifting device, and comprises a first end and a second end along the feeding direction of the vibrating screen device; the first lifting device is arranged at the first end of the vibrating screen, and is fixedly connected between the vehicle frame and the vibrating screen; the second lifting device is arranged at the second end of the vibrating screen, and is fixedly connected between the vehicle frame and the vibrating screen; and the first lifting device and the second lifting device are used for lifting the vibrating screen device, so that the vibrating screen device is separated from the vehicle frame. The technical scheme of the present application can solve the problem that the bottom of the vibrating screen of the vibrating screen device cannot be maintained due to the inconvenience of disassembly in the prior art, and improve the maintenance efficiency of the vibrating screen device. The present application also relates to a lifting method.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery, specifically to a mobile crushing and screening station and its lifting method. Background Technology

[0002] Crushing and screening equipment is generally used in mining machinery to crush and screen various large stones into different sizes for recycling and reuse. The screen is an important component of the crushing and screening equipment. Due to the harsh working environment in the mine, the service life of the screen will be affected. Therefore, whether the screen is easy to maintain is particularly important.

[0003] In conventional mobile crushing and screening equipment, the screens are distributed layer by layer in the vibrating screen. If maintenance is required, the screens can be removed one by one for inspection and maintenance. Maintenance personnel can operate from the outside. This maintenance method is more suitable for this type of crushing and screening equipment.

[0004] The tracked mobile heavy-duty screen equipment used for specific working conditions differs structurally from conventional mobile crushing and screening equipment. Compared with conventional crushing and screening equipment, the tracked mobile heavy-duty screen equipment has multiple rows of fence-like devices installed above the vibrating screen. This structural design can increase the strength of the vibrating screen and improve its impact resistance, making it suitable for specific working conditions. However, due to the large number of fences, the upper screen can be repaired during maintenance, but the conventional maintenance method (removing the lower screen from the outside for maintenance) cannot be used. Therefore, the lower screen cannot be removed for maintenance. Summary of the Invention

[0005] In view of the above problems, embodiments of the present invention provide a mobile crushing and screening station to solve the problem in the prior art that the bottom of the vibrating screen cannot be disassembled and thus cannot be repaired, thereby improving the maintenance efficiency of the vibrating screen device.

[0006] According to one aspect of the present invention, a mobile crushing and screening station is provided. The mobile crushing and screening station includes a frame, a vibrating screen device, a first lifting device, and a second lifting device. The vibrating screen device includes a first end and a second end along the feeding direction. The first lifting device is disposed at the first end and connected between the frame and the vibrating screen device. The second lifting device is disposed at the second end and connected between the frame and the vibrating screen device. The first lifting device and the second lifting device are used to lift the vibrating screen device so that the vibrating screen device is detached from the frame.

[0007] In one alternative embodiment, two first lifting devices are provided, spaced apart along the width direction of the vibrating screen device. Each first lifting device includes a first hydraulic cylinder, one end of which is hinged to the vibrating screen device, and the other end of which is connected to the frame. The first hydraulic cylinder can drive the vibrating screen device to be lifted.

[0008] In one alternative embodiment, the first lifting device includes a support frame, a guide rail, and a positioning element. The guide rail is slidably disposed within the support frame, and the end of the support frame is fixedly connected to the vehicle frame. The end of the guide rail is hinged to the vibrating screen device. The guide rail is provided with multiple positioning holes. When the vibrating screen device is lifted, the guide rail extends out of the support frame. The positioning element cooperates with the positioning holes to limit the position of the guide rail.

[0009] In one alternative embodiment, the lifting angle of the vibrating screen device ranges from 12° to 19°.

[0010] In one alternative embodiment, two second lifting devices are provided, respectively disposed on both sides of the vibrating screen device. Each second lifting device includes a fixed bracket, a movable bracket, and a second hydraulic cylinder. The fixed bracket is fixedly connected to the vehicle frame, and the movable bracket is rotatably connected to the fixed bracket via a first rotating shaft. One end of the second hydraulic cylinder is fixedly connected to the vehicle frame, and the other end of the second hydraulic cylinder is connected to one end of the movable bracket. The other end of the movable bracket is fixedly connected to the vibrating screen device. When the second hydraulic cylinder extends, the movable bracket rotates around the first rotating shaft and lifts the vibrating screen device.

[0011] In one alternative embodiment, the vibrating screen device includes a mounting frame and a vibrating screen, the mounting frame being fixedly connected to the movable support, the vibrating screen being connected to the mounting frame, one end of the buffer mechanism being connected to the mounting frame, and the other end of the buffer mechanism being rotatably connected to the vibrating screen.

[0012] In one alternative embodiment, the mounting frame is provided with a plurality of elastic elements, a connector, and a second rotating shaft. One end of each elastic element is connected to the mounting frame, and the other end of each elastic element is connected to the connector. The second rotating shaft is connected to the connector, and the vibrating screen is provided with a second through hole. The second rotating shaft is rotatably disposed within the second through hole.

[0013] In one alternative embodiment, the connector includes a first connecting block and a second connecting block that are fixedly connected. The first connecting block is fixedly connected to a plurality of first connecting posts, and each elastic element is sleeved on each of the first connecting posts. The second connecting block is provided with a through hole, and the second rotating shaft cooperates with the through hole to connect the second rotating shaft to the second connecting block.

[0014] In one alternative embodiment, the first hydraulic cylinder is provided with a muffler plug, which is connected to the oil port of the first hydraulic cylinder.

[0015] According to another aspect of the present invention, a lifting method is provided, comprising:

[0016] The first lifting device and the second lifting device are activated to lift the vibrating screen and detach it from the vehicle frame.

[0017] The positioning element is placed in the positioning hole at the required maintenance location to maintain the lifting height of the first lifting device.

[0018] The present invention places a first lifting device and a second lifting device between the vehicle frame and the vibrating screen device. The first lifting device and the second lifting device lift the vibrating screen device, so that the vibrating screen device is detached from the vehicle frame to form a maintenance space, which facilitates maintenance personnel to inspect the bottom of the vibrating screen device. This solves the problem in the prior art that the screen of the vibrating screen device cannot be removed, which makes maintenance impossible. It not only has a simple structure, but also improves maintenance efficiency.

[0019] The above description is merely an overview of the technical solutions of the embodiments of the present invention. In order to better understand the technical means of the embodiments of the present invention and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

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

[0021] Figure 1 A schematic diagram of the mobile crushing and screening station of the present invention is shown;

[0022] Figure 2 It shows Figure 1 Enlarged structural diagram at point A;

[0023] Figure 3 It shows Figure 1 Enlarged structural diagram at point B;

[0024] Figure 4 A front view structural schematic diagram of the mobile crushing and screening station of the present invention is shown;

[0025] Figure 5 It shows Figure 4 Enlarged structural diagram at point C;

[0026] Figure 6 A partial schematic diagram of the hydraulic control system of the mobile crushing and screening station of the present invention is shown;

[0027] Reference numerals: Positioning hole - 101; Movable groove - 102; Mounting groove - 103; Frame - 11; Fixed seat - 111; Mounting bracket - 121; Connecting part - 121a; Elastic element - 1211; First connecting block - 1212; Second connecting block - 1213; Second rotating shaft - 1214; Vibrating screen - 122; First lifting device - 13; First hydraulic cylinder - 131; Support frame - 132; Fixed plate - 1321; Guide rail - 133; Second Lifting device-14; Fixed bracket-141; Movable bracket-142; Second hydraulic cylinder-143; First rotating shaft-144; Oil tank-151; Oil pump-152; First main valve-153; Second main valve-154; Silencer plug-155; First hydraulic pipe-161; Second hydraulic pipe-162; Third hydraulic pipe-163; Fourth hydraulic pipe-164; Fifth hydraulic pipe-165; Sixth hydraulic pipe-166; Seventh hydraulic pipe-167.

[0028] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0032] like Figures 1 to 6 As shown, the mobile crushing and screening station includes a frame 11, a vibrating screen device (not shown), a first lifting device 13, and a second lifting device 14. Along the feeding direction of the vibrating screen device, a first end and a second end are sequentially arranged. When the first lifting device 13 and the second lifting device 14 are not lifting, the first end is positioned along the Z-axis direction (…). Figure 1 The height of Z) is greater than the height of the second end along the Z-axis; the first lifting device 13 is located at the first end of the vibrating screen device and is fixedly connected between the frame 11 and the vibrating screen device; the second lifting device 14 is located at the second end of the vibrating screen device and is fixedly connected between the frame 11 and the vibrating screen device; the first lifting device 13 and the second lifting device 14 are used to lift the vibrating screen device so that the vibrating screen device is detached from the frame 11. When the vibrating screen device needs to be lifted, the hydraulic circuits of the first lifting device 13 and the second lifting device 14 are simultaneously connected, and the first lifting device 13 and the second lifting device 14 lift simultaneously. The vibrating screen device includes a mounting frame 121 and a vibrating screen 122. The vibrating screen 122 is connected to the mounting frame 121. The first lifting device 13 is connected between the frame 11 and the mounting frame 121. When the vibrating screen 122 is working, the vibrating screen 122 moves relative to the mounting frame 121. When the vibrating screen 122 needs to be repaired, the first lifting device 13 and the second lifting device 14 lift the mounting frame 121 simultaneously, so that the vibrating screen 122 is lifted together with the mounting frame 121.

[0033] In this embodiment of the invention, the first lifting device 13 and the second lifting device 14 are arranged between the frame 11 and the vibrating screen device. The first lifting device 13 and the second lifting device 14 lift the vibrating screen device, so that the vibrating screen device is detached from the frame 11 to form a maintenance space, which facilitates maintenance personnel to maintain the vibrating screen 122 of the vibrating screen device. This solves the problem in the prior art that the screen of the vibrating screen device cannot be removed, which leads to the inability to maintain it. It not only has a simple structure, but also improves maintenance efficiency.

[0034] Preferably, the first lifting device 13 controls the height of the first end of the vibrating screen device, and the second lifting device 14 controls the height of the second end of the vibrating screen device.

[0035] like Figure 1 and Figure 2 As shown, there are two first lifting devices 13, which are spaced apart along the width of the vibrating screen device. Each first lifting device 13 includes a first hydraulic cylinder 131. One end of the first hydraulic cylinder 131 is hinged to the mounting frame 121 of the vibrating screen device, and the other end of the first hydraulic cylinder 131 is connected to the frame 11. The first hydraulic cylinder 131 can drive the vibrating screen device to be lifted. When the piston rod of the first hydraulic cylinder 131 extends and lifts the vibrating screen device, maintenance personnel can perform maintenance on the vibrating screen 122 in the gap between the vibrating screen device and the frame 11.

[0036] like Figure 4 and Figure 5 As shown, the first lifting device 13 includes a support frame 132, a guide rail 133, and a positioning component. The support frame 132 is a hollow columnar structure. The guide rail 133 is slidably disposed within the support frame 132. The end of the support frame 132 is fixedly connected to the frame 11, and the end of the guide rail 133 is hinged to the mounting bracket 121 of the vibrating screen device. The support frame 132 and the guide rail 133 extend parallel to the extension and retraction direction of the first hydraulic cylinder 131. Figure 5 As shown, the guide rail 133 is provided in multiple positioning holes 101, and each positioning hole 101 is spaced apart along the length of the guide rail 133. When the vibrating screen 122 is lifted, the guide rail 133 extends out from the support frame 132. The positioning element cooperates with the positioning hole 101 to limit the guide rail 133. When the vibrating screen 122 is working normally, the piston rod of the first hydraulic cylinder 131 does not extend, and the guide rail 133 is located in the support frame 132. When the vibrating screen 122 needs maintenance, the piston rod of the first hydraulic cylinder 131 extends, driving the guide rail 133 to extend out from the support frame 132, thereby lifting the vibrating screen device and lifting the vibrating screen 122. When the vibrating screen 122 reaches the height required for maintenance, the positioning element is set in the positioning hole 101 to limit the guide rail 133 and prevent the guide rail 133 from slipping. The positioning element is, for example, a positioning pin.

[0037] like Figure 5As shown, the lifting angle range of the vibrating screen device is 12° to 19°. The lifting angle of the vibrating screen device refers to the angle formed between the device and the ground. In the extension and retraction direction of the first lifting device 11, two adjacent positioning holes 101 are staggered. The scale difference between two adjacent positioning holes 101 can be 1° (of course, it can be set to other degrees as needed). For example, when the positioning element is set in the positioning hole 101 with a scale of 16°, the angle between the vibrating screen device and the ground is 16°. If the positioning element is set in the positioning hole 101 with a scale of 17°, the angle between the vibrating screen device and the ground is 17°. When the angle is 17°, the lifting height of the vibrating screen device is greater than the lifting height of the vibrating screen 122 when the angle is 16°. It should be noted that the lifting height here refers to the height of the first end of the vibrating screen device.

[0038] like Figure 2 and Figure 4 As shown, the frame 11 is fixedly connected to a fixing seat 111, and the fixing connection method is, for example, welding. The number of fixing seats 111 corresponds to the number of first lifting devices 13 (that is, if there are two first lifting devices 13, then there are two fixing seats 111). The fixing seat 111 is used to fix the first lifting device 13. Specifically, the fixing seat 111 is provided with a first connecting hole. The first connecting shaft cooperates with the first connecting hole to fix the support frame 132 to the fixing seat 111. The support frame 132 is provided with two fixing plates 1321. The two fixing plates 1321 are fixedly connected to one end of the support frame 132 near the frame 11. The fixing plate 1321 is provided with a second connecting hole. The second connecting shaft cooperates with the second connecting hole to fix the first hydraulic cylinder 131 to the fixing plate 1321.

[0039] In one alternative embodiment, two second lifting devices 14 are provided, and the two second lifting devices 14 are respectively arranged in the width direction of the vibrating screen 122. Figure 1 On both sides of the Y-axis, the second lifting device 14 includes a fixed bracket 141, a movable bracket 142, and a second hydraulic cylinder 143. The fixed bracket 141 is fixedly connected to the frame 11 and has a movable groove 102. The movable bracket 142 is disposed in the movable groove 102 and is rotatably connected to the fixed bracket 141 via a first rotating shaft 144. One end of the second hydraulic cylinder 143 is fixedly connected to the frame 11, and the other end of the second hydraulic cylinder 143 is connected to one end of the movable bracket 142. The other end of the movable bracket 142 is fixedly connected to the vibrating screen device, i.e., the mounting bracket 121. When the second hydraulic cylinder 143 extends, the movable bracket 142 rotates around the first rotating shaft 144 and lifts the vibrating screen device. The movable bracket 142 is, for example, triangular.

[0040] like Figure 4As shown, the mounting frame 121 is fixedly connected to the movable bracket 142. The mounting frame 121 includes a support part and two connecting parts 121a connected to the support part. The support part and the connecting parts 121a are integrally formed. The two connecting parts 121a are respectively arranged on both sides of the vibrating screen 122. The movable bracket 142 is fixedly connected to the connecting parts 121a. The fixed connection method is, for example, bolt connection or pin connection.

[0041] like Figure 1 and Figure 3 As shown, the mounting frame 121 is provided with a plurality of elastic elements 1211, a connecting member, and a second rotating shaft 1214. One end of each elastic element 1211 is connected to the connecting portion 121a of the mounting frame 121, and the other end of each elastic element 1211 is connected to the connecting member. The second rotating shaft 1214 is connected to the connecting member. The vibrating screen 122 is provided with a second through hole, and the second rotating shaft 1214 is rotatably disposed in the second through hole. In this embodiment, the elastic elements 1211 are, for example, three or four, preferably three, and an included angle is formed between two adjacent elastic elements 1211.

[0042] like Figure 3 As shown, the connector includes a first connecting block 1212 and a second connecting block 1213 that are fixedly connected. The first connecting block 1212 is fixedly connected to a plurality of first connecting posts, and each elastic element 1211 is sleeved on each of the first connecting posts. The second connecting block 1213 has a third through hole, and a second rotating shaft 1214 cooperates with the third through hole to connect the second rotating shaft 1214 to the second connecting block 1213. In this embodiment, the vibrating screen 122 is fixedly connected to a mounting groove 103, and the second connecting block 1213 is fixedly connected to the mounting groove 103 by bolts.

[0043] In one alternative embodiment, the connecting portion 121a of the mounting bracket 121 is fixedly connected to a plurality of second connecting posts, and the other end of each elastic element 1211 is sleeved on each of the second connecting posts. The first connecting post and the second connecting post are arranged opposite to each other and are used to fix the elastic element 1211. The elastic element 1211 is, for example, a spring. When the vibrating screen 122 is working or being lifted, the elastic element 1211 can buffer the vibrating screen 122 and extend the service life of the vibrating screen 122.

[0044] like Figure 6As shown, the mobile crushing and screening station also includes an oil tank 151, an oil pump 152, a first main valve 153, and a second main valve 154. The oil pump 152 is used to supply hydraulic oil in the oil tank 151 to the first hydraulic cylinder 131 and the second hydraulic cylinder 143 through the first main valve 153 and the second main valve 154, respectively, so as to control the extension and retraction of the first hydraulic cylinder 131 and the second hydraulic cylinder 143. Specifically, the first main valve 153 includes a first valve port, a second valve port, and a third valve port. The first valve port is connected to the oil pump 152, the second valve port is connected to the oil tank 151, and the third valve port is connected to the first hydraulic cylinder 131. The first main valve 153 is used to switch positions to connect the first valve port and the third valve port (at this time, the first main valve 153 is in the lower position, the oil pump 152 supplies oil to the first hydraulic cylinder 131, and the first lifting device 13 lifts), or disconnect the first valve port and the third valve port and connect the second valve port and the third valve port (at this time, the first main valve 153 is in the middle position, the oil pump 152 does not supply oil to the first hydraulic cylinder 131, the hydraulic oil in the first hydraulic cylinder 131 flows back to the oil tank 151 to achieve oil return, and the first lifting device 13 retracts). The second main valve 154 includes a fourth valve port, a fifth valve port, a sixth valve port, and a seventh valve port. The fourth valve port is connected to the oil pump 152, the fifth valve port is connected to the oil tank 151, the sixth valve port is connected to the second hydraulic cylinder 143, and the seventh valve port is connected to the hydraulic valve (not shown in the figure) of the second hydraulic cylinder 143. The second main valve 154 is used to switch between connecting the fourth valve port and the sixth valve port, so that the oil pump 152 supplies oil to the second hydraulic cylinder 143 and the second lifting device 14 lifts; or disconnecting the fourth valve port and the sixth valve port and connecting the fifth valve port and the seventh valve port, so that the hydraulic valve (not shown in the figure) of the second hydraulic cylinder 143 is in the open state, and the hydraulic oil flows to the oil tank 151 through the seventh hydraulic pipe 167 and the fifth hydraulic pipe 165 under the action of gravity, realizing oil return.

[0045] In one alternative embodiment, the first main valve 153 and the second main valve 154 are, for example, solenoid valves, and both are three-position four-way valves; the first hydraulic cylinder 131 is provided with a muffler plug 155, which is connected to the oil port of the first hydraulic cylinder 131. The muffler plug 155 can condense water vapor and separate it from the air, and can eliminate the back pressure circuit, optimize the pipeline layout, and reduce the inconvenience caused by numerous pipelines.

[0046] In one alternative configuration, a first hydraulic pipe 161 is connected between the oil pump 152 and the first valve port, a second hydraulic pipe 162 is connected between the second valve port and the oil tank 151, and a third hydraulic pipe 163 is connected between the third valve port and the first hydraulic cylinder 131. When the first main valve 153 is turned on, the first hydraulic pipe 161 and the third hydraulic pipe 163 are connected, and the oil pump 152 pumps hydraulic oil into the cylinder body of the first hydraulic cylinder 131. Air in the first hydraulic cylinder 131 is discharged from the muffler plug 155, and the piston rod of the first hydraulic cylinder 131 is pushed out by the hydraulic oil and lifts the mounting bracket 121. When the second hydraulic pipe 162 and the third hydraulic pipe 163 are connected, the hydraulic oil flows from the cylinder body of the first hydraulic pipe 161 through the third hydraulic pipe 163 and the second hydraulic pipe 162 to the oil tank 151 under the action of gravity, and air enters the first hydraulic cylinder 131 through the muffler plug 155.

[0047] In one alternative configuration, a fourth hydraulic pipe 164 is connected between the oil pump 152 and the fourth valve port, a fifth hydraulic pipe 165 is connected between the fifth valve port and the oil tank 151, a sixth hydraulic pipe 166 is connected between the sixth valve port and the cylinder body of the second hydraulic cylinder, and a seventh hydraulic pipe 167 is connected between the seventh valve port and the hydraulic valve of the second hydraulic cylinder 143. After the second main valve 154 is turned on, the fourth hydraulic pipe 164 and the sixth hydraulic pipe 166 are connected, and the oil pump 152 pumps hydraulic oil into the cylinder body of the second hydraulic cylinder 143. The piston rod of the second hydraulic cylinder 143 is pushed out by the hydraulic oil and lifts the mounting bracket 121. When the hydraulic valve of the second hydraulic cylinder 143 is opened and the fifth hydraulic pipe 165 and the seventh hydraulic pipe 167 are connected, the hydraulic oil flows into the oil tank 151 through the seventh hydraulic pipe 167 and the fifth hydraulic pipe 165 under the action of gravity.

[0048] The present invention also includes a lifting method utilizing a mobile crushing and screening station, the lifting method comprising:

[0049] The first lifting device 13 and the second lifting device 14 are activated, and the first lifting device 13 and the second lifting device 14 lift the vibrating screen device, so that the vibrating screen device is detached from the frame 11; when the first main valve 153 and the second main valve 154 are turned on, the first hydraulic pipe 161 is connected to the third hydraulic pipe 163, and the oil pump 152 pumps hydraulic oil into the cylinder body of the first hydraulic cylinder 131. The air in the first hydraulic cylinder 131 is discharged from the muffler plug 155, and the piston rod of the first hydraulic cylinder 131 is pushed out by the hydraulic oil and lifts the mounting frame 121; the fourth hydraulic pipe 164 is connected to the sixth hydraulic pipe 166, and the oil pump 152 pumps hydraulic oil into the cylinder body of the second hydraulic cylinder 143. The piston rod of the second hydraulic cylinder 143 is pushed out by the hydraulic oil and lifts the mounting frame 121.

[0050] The positioning element is placed in the positioning hole 101 at the required maintenance position to maintain the lifting height of the first lifting device 13. When the vibrating screen device is lifted to the required maintenance height, the positioning element is inserted into the positioning hole 101 at that height to limit the guide rail 133 and support the mounting frame 121.

[0051] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A mobile crushing and screening station, characterized in that, The mobile crushing and screening station is a mobile heavy-duty screening equipment, including a frame (11), a vibrating screen device, a first lifting device (13) and a second lifting device (14). The vibrating screen device includes a vibrating screen and a multi-row grid-like device installed above the vibrating screen. The vibrating screen device includes a first end and a second end along the feeding direction. The first lifting device (13) is located at the first end and is connected between the frame (11) and the vibrating screen device. The second lifting device (14) is located at the second end and is connected between the frame (11) and the vibrating screen device. The first lifting device (13) and the second lifting device (14) are used to lift the vibrating screen device so that the vibrating screen device is detached from the frame (11) to form a space for maintenance. The first lifting device (13) includes a first hydraulic cylinder (131), one end of which is hinged to the vibrating screen device, and the other end of which is connected to the frame (11). The first hydraulic cylinder (131) can drive the vibrating screen device to lift. The second lifting device (14) includes a fixed bracket (141), a movable bracket (142), and a second hydraulic cylinder (143). The fixed bracket (141) is fixedly connected to the frame (11). The movable bracket (142) is rotatably connected to the fixed bracket (141) via a first rotating shaft (144). One end of the second hydraulic cylinder (143) is fixedly connected to the frame (11), and the other end of the second hydraulic cylinder (143) is connected to one end of the movable bracket (142). The other end of the movable bracket (142) is fixedly connected to a mounting frame. The mounting frame is rotatably connected to the vibrating screen of the vibrating screen device. When the second hydraulic cylinder (143) extends, the movable bracket (142) rotates around the first rotating shaft (144) and lifts the vibrating screen device.

2. The mobile crushing and screening station as described in claim 1, characterized in that, Two first lifting devices (13) are provided, and the two first lifting devices (13) are spaced apart along the width direction of the vibrating screen device.

3. The mobile crushing and screening station as described in claim 2, characterized in that, The first lifting device (13) includes a support frame (132), a guide rail (133), and a positioning element. The guide rail (133) is slidably disposed in the support frame (132). The end of the support frame (132) is fixedly connected to the frame (11). The end of the guide rail (133) is hinged to the vibrating screen device. The guide rail (133) is provided in a plurality of positioning holes (101). When the vibrating screen device is lifted, the guide rail (133) is driven to extend out of the support frame (132). The positioning element cooperates with the positioning holes (101) to limit the guide rail (133).

4. The mobile crushing and screening station as described in claim 3, characterized in that, The lifting angle range of the vibrating screen device is 12° to 19°.

5. The mobile crushing and screening station as described in claim 3, characterized in that, There are two second lifting devices (14), and the two second lifting devices (14) are respectively arranged on both sides of the vibrating screen device.

6. The mobile crushing and screening station as described in claim 5, characterized in that, The vibrating screen device includes a mounting frame (121) and a vibrating screen (122). The mounting frame (121) is fixedly connected to the movable support (142), and the vibrating screen (122) is connected to the mounting frame (121).

7. The mobile crushing and screening station as described in claim 6, characterized in that, The mounting frame (121) is provided with a plurality of elastic elements (1211), a connector, and a second rotating shaft (1214). One end of each elastic element (1211) is connected to the mounting frame (121), and the other end of each elastic element (1211) is connected to the connector. The second rotating shaft (1214) is connected to the connector. The vibrating screen (122) is provided with a second through hole, and the second rotating shaft (1214) is rotatably disposed in the second through hole.

8. The mobile crushing and screening station as described in claim 7, characterized in that, The connector includes a first connecting block (1212) and a second connecting block (1213) that are fixedly connected. The first connecting block (1212) is fixedly connected to a plurality of first connecting posts, and each elastic element (1211) is sleeved on each of the first connecting posts. The second connecting block (1213) is provided with a through hole, and the second rotating shaft (1214) cooperates with the through hole to connect the second rotating shaft (1214) to the second connecting block (1213).

9. The mobile crushing and screening station as described in claim 2, characterized in that, The first hydraulic cylinder (131) is equipped with a muffler plug (155), which is connected to the oil port of the first hydraulic cylinder (131).

10. A lifting method using the mobile crushing and screening station according to any one of claims 1 to 9, characterized in that, The lifting method includes: Start the first lifting device (13) and the second lifting device (14). The first lifting device (13) and the second lifting device (14) lift the vibrating screen (122) so that the vibrating screen (122) is removed from the frame (11). The positioning element is placed in the positioning hole (101) at the required position for maintenance to maintain the lifting height of the first lifting device (13).

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