Screening machine

Abstract

The utility model provides a screening machine which comprises a plurality of screening boxes, a screening platform and a transverse vibration meter, the screening boxes are stacked from top to bottom, and the bottom of the screening box on the lowermost layer is connected to the screening platform; every two adjacent screening boxes are connected through a sealing ring, and the side wall of each screening box is connected with a transverse vibration meter in a one-to-one correspondence mode. And the apertures of the screens in the screening boxes are sequentially reduced from top to bottom. According to the screening machine, the vibration intensity of each layer of screening box is controlled through the transverse vibration meter, so that the screening efficiency and speed are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to aggregate screening device technical field relates to a screening machine, especially for the highway aggregate fine screening two -way vibration and convenient discharge screening machine. BACKGROUND

[0002] The process of separating granular aggregate into different particle sizes by one or several layers of screen surface is called screening. The screening machine is a vibrating screening mechanical equipment that uses the relative movement of granular aggregate and the screen surface to allow some particles to pass through the screen hole, and separates sand, gravel, crushed stone and other aggregate into different grades according to particle size. The screening process of the screening machine is generally continuous. After the screening raw material is fed onto the screen, the aggregate smaller than the screen hole size passes through the screen hole, which is called undersize product. The aggregate larger than the screen hole size is continuously discharged from the screen surface, which is called oversize product.

[0003] With the vigorous development of highway construction in China, the research on road materials is gradually becoming more refined. A large number of tests require more refined aggregate gradation division. Therefore, the screening machine with multiple layers of screen mesh combination has emerged.

[0004] For example, Chinese patent CN212216218U discloses a double-layer double-direction vibrating powder screening device with replaceable screen mesh, which comprises a shell, a powder screening assembly arranged at the upper part of the shell, and a vibrating assembly arranged below the powder screening assembly. The vibrating assembly comprises a transverse vibrating motor and a longitudinal vibrating motor. Two cylindrical concave grooves are arranged on the inner side wall of the shell in the transverse and longitudinal directions. The transverse vibrating motor and the longitudinal vibrating motor are fixed in the cylindrical concave grooves by clamps. This technical solution provides two layers of screen mesh and transverse vibrating motor and longitudinal vibrating motor. However, the transverse vibration of the two layers of screen mesh is provided by the same transverse vibrating motor. The use of a single transverse vibrating motor can cause energy waste or reduce the screening efficiency and accuracy. When the particle size ratio of the screened aggregate is significantly different, if a single transverse vibrating motor is used, when the transverse vibrating motor uses a larger vibration intensity, for the aggregate particle size layer with less screening amount, it can cause insufficient use of energy and a larger displacement at the connection of the screening box, which can damage the connection. If the transverse vibrating motor uses a smaller power, it can cause problems such as insufficient screening accuracy and slow screening rate for the aggregate particle size layer with more screening amount. SUMMARY

[0005] In order to solve the above-mentioned problems of the prior art, the utility model provides a screening machine, which controls the vibration intensity of each layer of screening box through a transverse vibration instrument, thereby increasing the screening efficiency and rate.

[0006] The utility model realizes the following technical scheme:

[0007] A screening machine comprises a plurality of screening boxes, a screening platform and transverse vibration devices, the plurality of screening boxes are arranged in layers from top to bottom, the bottom of the lowermost screening box is connected to the screening platform; two adjacent screening boxes are connected through a sealing ring, one transverse vibration device is connected to the side wall of each screening box in one-to-one correspondence; the mesh size of the screen in each screening box decreases in turn from top to bottom.

[0008] Preferably, the screening machine further comprises a base and a longitudinal vibration box, the screening platform is arranged on the base; the longitudinal vibration box is arranged in the base and is used to provide a longitudinal vibration force for the screening boxes.

[0009] Further, a step is arranged at the outer edge of the base, a damping spring is arranged on the step; one end of the bottom of the damping spring is fixed on the step, and the other end of the top is connected to the bottom surface of the screening platform.

[0010] Further, a discharge port is arranged on the side wall of the screening box at a position flush with the screen, a rotating baffle is arranged on the side wall of the screening box, and the rotating baffle can move along the side wall of the screening box to open or close the discharge port.

[0011] Further, a telescopic rod is vertically arranged on the base, the top of the telescopic rod is in contact with the bottom of the screening platform; the telescopic rod and the discharge port are symmetrical about the axis of the screening box.

[0012] Further, the telescopic rod comprises a fixed shell, a first piston and a second piston; the second piston is slidingly arranged in the first piston, and the first piston is slidingly arranged in the fixed shell; the fixed shell is fixed on the base, a first medium inlet hole is arranged at the bottom of the fixed shell, a second medium inlet hole is arranged at the bottom of the first piston, and a third medium inlet hole is arranged at the upper end of the fixed shell, which is always in communication with the gap between the fixed shell and the first piston; a medium flow channel is arranged on the side wall of the first piston, one end of the medium flow channel extends to the lower end of the first piston and is always in communication with the gap between the fixed shell and the first piston, and the other end of the medium flow channel extends to the upper end of the first piston and is in communication with the gap between the first piston and the second piston.

[0013] Further, a rack is arranged at the end of the rotating baffle away from the discharge port, a rotating rod is rotatably arranged on the side wall of the screening box, and gear teeth are arranged on the surface of the rotating rod, the gear teeth are engaged with the rack.

[0014] Further, a cushion block is arranged between the bottom of the lowermost screening box and the screening platform.

[0015] Preferably, a fixed rod is arranged on the screening platform, a fixed rod clamping ring is arranged on the outer surface of the side wall of the screening box, the fixed rod is arranged in the fixed rod clamping ring, and a limiting ring is arranged at the upper end of the fixed rod.

[0016] Preferably, the transverse vibration instrument comprises a transverse telescopic rod, a motion converter, a first motor and a transverse vibration operation platform; an inner gear is connected to an output shaft of the first motor, the motion converter is connected in meshing with the inner gear, the motion converter is hinged to one end of the transverse telescopic rod, and the other end of the transverse telescopic rod is connected with a side wall of the screening box; the first motor is signal connected with the transverse vibration operation platform, and the transverse vibration operation platform is used for controlling the rotating speed of the first motor.

[0017] Compared with the prior art, the transverse vibration instrument has the following beneficial effects:

[0018] The screening machine is provided with one transverse vibration instrument corresponding to each layer of screening box, the screening box and the transverse vibration instrument are connected in one-to-one correspondence, and the adjacent two screening boxes are connected through a flexible sealing ring, the sealing ring allows a certain dislocation between the adjacent screening boxes, therefore, the vibration intensity of the corresponding screening box can be controlled through the transverse vibration instrument, so that different transverse vibration intensities are adopted by the screening boxes.

[0019] Further, the base is provided with a longitudinal vibration box, the longitudinal vibration box provides longitudinal vibration for the screening box, realizes bidirectional vibration and improves the screening effect.

[0020] Further, the damping spring is arranged between the screening platform and the base, and can play a certain damping effect, so that the screening platform is prevented from excessively pressing the base during longitudinal vibration.

[0021] Further, the discharging port is arranged on the side wall of the screening box, when discharging is needed, the screening box does not need to be disassembled, the rotating baffle is directly opened, and the material is discharged from the discharging port, so that convenient discharging can be realized.

[0022] Further, the telescopic rod is arranged on the base, when discharging is needed, the telescopic rod is extended, so that the screening box is inclined to the direction of the discharging port, thereby realizing discharging and making the discharging more convenient.

[0023] Further, a cushion block is arranged between the bottom of the lowermost screening box and the screening platform, the cushion block has a certain flexibility, when vertical vibration is generated by the longitudinal vibration box, the cushion block can eliminate the adverse effect of the vertical vibration on the lowermost screening box, and the cushion block and the sealing ring can jointly reduce the vertical change of the whole screening box under the vertical vibration.

[0024] Further, a fixed rod is arranged on the screening platform, a fixed rod clamping ring is arranged on the outer surface of the side wall of the screening box, and the fixed rod is arranged in the fixed rod clamping ring, so that the fixed rod can limit the screening box under the condition of meeting the transverse vibration displacement of the screening box, and the transverse vibration displacement of the screening box is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 is a front view of a screening machine of the present application;

[0027] Figure 2 is a side view of a screening machine of the present application;

[0028] Figure 3 is a perspective view of a screening box of the present application;

[0029] Figure 4 is a top view of a screening box of the present application;

[0030] Figure 5 is a connection schematic view of two adjacent screening boxes of the present application;

[0031] Figure 6 is a connection schematic view of a rotating rod and a rotating baffle of the present application;

[0032] Figure 7 is a schematic view of a cushion block of the present application;

[0033] Figure 8 is a structure schematic view of a transverse vibration instrument of the present application;

[0034] Figure 9 is a structure schematic view of a telescopic rod of the present application.

[0035] 1. fixed rod, 2. limiting ring, 3. feeding port, 4. screening box, 41. discharging port, 42. rotating rod, 43. fixed rod clamping ring, 44. rotating baffle, 45. sealing ring, 5. screening platform, 6. cushion block, 7. transverse vibration instrument, 71. transverse telescopic rod, 72. motion converter, 73. first motor, 8. telescopic rod, 81. fixed shell, 82. first piston, 83. second piston, 84. first medium inlet, 85. second medium inlet, 86. third medium inlet, 87. medium flow channel, 9. damping spring, 10. longitudinal vibration box, 101. weight, 102. second motor, 11. dust cover, 12. base, 13. transverse vibration operation table. DETAILED DESCRIPTION

[0036] The other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the specification. The present application can also be implemented or applied by different specific embodiments, and the details in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application.

[0037] It should be noted that the process equipment or device not specifically mentioned in the following examples is the conventional equipment or device in the art.

[0038] It should be noted that the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device. Moreover, unless otherwise specified, the numbering of the method steps is only a convenient tool for identifying the method steps, and is not a limitation on the arrangement order of the method steps or a limitation on the scope of the present application, and changes or adjustments of the relative relationship, without substantial changes in the technical content, are also considered as the scope of the present application.

[0039] Further, it needs to be explained that the terms "first", "second" and the like in the utility model are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. The orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, but also can be detachable connection; it can be directly connected, but also indirectly connected through an intermediate medium, it can be the communication inside two elements.

[0040] As shown in Figure 1 and Figure 2 , a screening machine, comprising several screening boxes 4, screening platforms 5, bases 12, longitudinal vibration boxes 10, transverse vibration instruments 7, several screening boxes 4 are stacked from top to bottom, the bottom of the lowermost screening box 4 is connected to the screening platform 5, the screening platform 5 is arranged on the base 12, and the longitudinal vibration box 10 is arranged in the base 12. The side wall of each screening box 4 corresponds to connect a transverse vibration instrument 7. From top to bottom, the screen aperture in each screening box 4 is gradually reduced. As shown in Figure 5 , two adjacent screening boxes 4 are connected through a sealing ring 45, and the sealing ring can be connected with the sealing ring through a clasp. The sealing ring is a semi-flexible material with good upper and lower connection, which can meet the demand of small lateral displacement between different layers of screening boxes.

[0041] Each transverse vibration instrument 7 is used for providing transverse vibration force for the corresponding screening box 4, because two adjacent screening boxes 4 are connected through a sealing ring 45, and the sealing ring 45 has a certain flexibility, so the two adjacent screening boxes 4 have relative motion, so the working frequency of each transverse vibration instrument 7 can be set according to the need, so as to provide suitable vibration intensity for different screening boxes 4. When screening aggregate, different vibration intensity can be used for aggregate with different particle size, and higher vibration intensity is used for large particle aggregate; at the same time, according to the proportion of different particle size of the screened aggregate, higher vibration intensity is used for screening the particle with large proportion, so as to increase the screening efficiency and rate.

[0042] Each screening box 4 is provided with a screen, and a discharge port 41 is formed in a position flush with the screen on the side wall of the screening box 4. A rotating baffle 44 is arranged on the side wall of the screening box 4, and the rotating baffle 44 can move along the side wall of the screening box 4 to open or close the discharge port 41, as shown in Figs. Figure 3 , Figure 4

[0043] Specifically, as shown in Fig. Figure 6 , one end of the rotating baffle 44 away from the discharge port 41 is provided with a rack, and a rotating rod 42 is rotatably arranged on the side wall of the screening box 4, and the surface of the rotating rod 42 is provided with a gear tooth, which is engaged with the rack. By rotating the rotating rod 42, the rotating baffle 44 can be pushed to move along the side wall of the screening box 4 to open or close the discharge port 41.

[0044] As shown in Figs. Figure 1 and 2 , the top of the uppermost screening box 4 is provided with a dust cover 11, and the dust cover 11 is provided with a feeding port 3, and the feeding port 3 is connected to the dust cover 11 by buckling. The aggregate to be screened enters the uppermost screening box 4 from the feeding port, and after screening, aggregate of different particle sizes is intercepted on the corresponding screening box 4.

[0045] The screening platform 5 is provided with a fixing rod 1, the outer surface of the side wall of the screening box 4 is provided with a fixing rod clamping ring 43, the fixing rod 1 is arranged in the fixing rod clamping ring 43, and the upper end of the fixing rod 1 is provided with a limiting ring 2. The hole diameter of the fixing rod clamping ring 43 is greater than the diameter of the fixing rod 1, and the screening box 4 is limited to a certain extent under the condition of meeting the transverse vibration displacement of the screening box 4, so as to avoid excessive transverse vibration displacement of the screening box 4. The limiting ring 2 is used to limit the longitudinal displacement of the screening box 4, so as to avoid excessive longitudinal displacement.

[0046] In some specific embodiments of the utility model, a pad 6 is arranged between the bottom of the lowermost screening box 4 and the screening platform 5, so that the screening box 4 is connected to the screening platform 5 through the pad 6. As shown in Fig. Figure 7 , it is a schematic view of the pad 6. The pad 6 is a semi-flexible pad, which has a certain flexibility. When the vertical vibration of the longitudinal vibration box 10 is generated, the pad 6 can appropriately eliminate the adverse effects of the vertical vibration on the lowermost screening box 4, and can also reduce the vertical change amount of the whole screening box under the vertical vibration by cooperating with the sealing ring 45.

[0047] In some specific embodiments of the utility model, the outer edge of the base 12 is provided with an annular step, and four shock-absorbing springs 9 are arranged on the step. One end of the bottom of the shock-absorbing spring 9 is fixed on the step, and the other end of the top is connected to the bottom surface of the screening platform 5, so as to play a certain shock-absorbing effect and avoid excessive extrusion of the screening platform on the base 12. ​

[0048] In some specific embodiments of the utility model, the base 12 is vertically provided with a telescopic rod 8, and the top of the telescopic rod 8 is in contact with the bottom of the screening platform 5. The telescopic rod 8 and the discharge port 41 are symmetrical about the axis of the screening box 4, so that when the telescopic rod 8 is elongated, the screening platform 5 can drive the screening box 4 to tilt towards the direction of the discharge port 41, so as to pour out the aggregate on the screen. The arrangement of the discharge port 41 and the telescopic rod 8 can make the discharging more convenient.

[0049] In some specific embodiments of the utility model, as shown in the drawings, Figure 9 The first piston 82 is slidably arranged in the fixed shell 81, and the outer wall at the bottom of the first piston 82 is in sealing contact with the inner wall of the fixed shell 81. The top of the fixed shell 81 is provided with an opening for the first piston 82 to extend out. The fixed shell 81 is fixed on the base 12, and a first medium inlet hole 84 is formed in the bottom of the fixed shell 81. A second medium inlet hole 85 is formed in the bottom of the first piston 82. The flowing medium introduced from the first medium inlet hole 84 can push the second piston 83 and the first piston 82 to move upwards, so that the screening box 4 is tilted, and the aggregate on the screen is poured out. A third medium inlet hole 86 is formed in the upper end of the fixed shell 81, and the third medium inlet hole 86 is always in communication with the gap between the fixed shell 81 and the first piston 82. A medium flow channel 87 is formed in the side wall of the first piston 82, one end of the medium flow channel 87 extends to the lower end of the first piston 82 and is always in communication with the gap between the fixed shell 81 and the first piston 82, and the other end of the medium flow channel 87 extends to the upper end of the first piston 82 and is in communication with the gap between the first piston 82 and the second piston 83. The flowing medium introduced from the third medium inlet hole 86 into the gap between the fixed shell 81 and the first piston 82 enters the gap between the first piston 82 and the second piston 83 along the medium flow channel 87, pushes the second piston 83 to move downwards, and at the same time pushes the first piston 82 to move downwards, so that the screening box 4 returns to the horizontal position.

[0050] It should be noted that the first piston 82 and the second piston 83 are both provided with a limiting step, so that when the first piston 82 rises to the highest position, there is still a gap between the first piston 82 and the fixed shell 81, and when the second piston 83 rises to the highest position, there is still a gap between the second piston 83 and the first piston 82, so that the flowing medium introduced from the second air inlet makes the first piston 82 and the second piston 83 descend.

[0051] In some specific embodiments of the utility model, as shown in the drawings, Figure 8As shown, the transverse vibration instrument 7 includes a transverse telescopic rod 71, a motion converter 72, a first motor 73 and a transverse vibration operation table 13. The output shaft of the first motor 73 is connected with an internal gear, the internal gear is connected with the motion converter 72 in meshing, the motion converter 72 is meshed with one end of the transverse telescopic rod 71, and the other end of the transverse telescopic rod 71 is connected with the side wall of the screening box 4. The first motor 73 is signal connected with the transverse vibration operation table 13, the rotation speed of the first motor 73 is controlled through the transverse vibration operation table 13, the rotation motion generated by the first motor 73 is converted into horizontal motion of the transverse telescopic rod 71 through the motion converter 72, and the screening box 4 is correspondingly vibrated through the transverse telescopic rod 71. Since the rotation speed of the first motor 73 is controlled, different vibration intensities can be generated for each layer of the screening box 4, and through selection of different intensities, the screening is more accurate and effective.

[0052] In the specific embodiment of the utility model, the screening box 4 is a cylinder.

[0053] In the specific embodiment of the utility model, according to production needs, the required number and screen mesh aperture of the screening box 4 are installed in the screening machine, the aggregate enters the screening machine from the feeding port 3, and the aggregate is screened layer by layer under the action of vertical vibration and transverse vibration, the aggregate with the smallest particle size falls on the screen mesh of the screening box 4 in the lowermost layer, the rotating baffle 44 is opened or closed through the rotating rod 42, the discharge port 3 is opened or closed, and the aggregate is discharged from the discharge port 3 through the extension of the telescopic rod 8.

[0054] The screening machine has small floor area, does not need to disassemble the screen each time, and is combined with transverse vibration and vertical vibration, and the size of the transverse vibration is controlled, so that the screening is more complete, clean and efficient.

[0055] As known from common technical knowledge, the utility model can be realized through other embodiments without departing from the spirit or essential characteristics thereof. The above disclosed embodiments are only examples and are not the only ones. All changes within the scope of the utility model or within the scope equivalent to the utility model are included in the utility model.

Claims

1. A screening machine characterized in that, The screening device comprises several screening boxes (4), a screening platform (5) and transverse vibration devices (7), the several screening boxes (4) are arranged in layers from top to bottom, the bottom of the lowermost screening box (4) is connected to the screening platform (5), two adjacent screening boxes (4) are connected through a sealing ring (45), one transverse vibration device (7) is connected to the side wall of each screening box (4) in one-to-one correspondence, and the mesh size of the screen in each screening box (4) decreases from top to bottom.

2. The screening machine of claim 1, wherein, The screening device also comprises a base (12) and a longitudinal vibration box (10), the screening platform (5) is arranged on the base (12), and the longitudinal vibration box (10) is arranged in the base (12) and used for providing a longitudinal vibration force for the screening box (4).

3. The screening machine of claim 2, wherein, The outer edge of the base (12) is provided with a step, a damping spring (9) is arranged on the step, one end of the bottom of the damping spring (9) is fixed to the step, and the other end of the top of the damping spring (9) is connected to the bottom surface of the screening platform (5).

4. The screening machine of claim 2, wherein, A discharge port (41) is arranged on the side wall of the screening box (4) at a position flush with the screen, and a rotating baffle (44) is arranged on the side wall of the screening box (4), the rotating baffle (44) can move along the side wall of the screening box (4) to open or close the discharge port (41).

5. The screening machine of claim 4, wherein, A telescopic rod (8) is vertically arranged on the base (12), the top of the telescopic rod (8) is in contact with the bottom of the screening platform (5), and the telescopic rod (8) and the discharge port (41) are symmetrical about the axis of the screening box (4).

6. The screening machine of claim 5, wherein, The telescopic rod (8) comprises a fixed shell (81), a first piston (82) and a second piston (83), the second piston (83) is slidably arranged in the first piston (82), the first piston (82) is slidably arranged in the fixed shell (81), the fixed shell (81) is fixed to the base (12), a first medium inlet hole (84) is arranged in the bottom of the fixed shell (81), a second medium inlet hole (85) is arranged in the bottom of the first piston (82), a third medium inlet hole (86) is arranged in the upper end of the fixed shell (81), the third medium inlet hole (86) is always in communication with the gap between the fixed shell (81) and the first piston (82), a medium flow channel (87) is arranged on the side wall of the first piston (82), one end of the medium flow channel (87) extends to the lower end of the first piston (82) and is always in communication with the gap between the fixed shell (81) and the first piston (82), and the other end of the medium flow channel (87) extends to the upper end of the first piston (82) and is in communication with the gap between the first piston (82) and the second piston (83).

7. The screening machine of claim 4, wherein, One end of the rotating baffle (44) away from the discharge port (41) is provided with a rack, a rotating rod (42) is rotatably arranged on the side wall of the screening box (4), and the surface of the rotating rod (42) is provided with a gear tooth, the gear tooth is engaged with the rack.

8. The screening machine of claim 2, wherein, A cushion block (6) is arranged between the bottom of the lowermost screening box (4) and the screening platform (5).

9. The screening machine of claim 1, wherein, The fixed rod (1) is arranged on the screening platform (5), the outer surface of the side wall of the screening box (4) is provided with a fixed rod clamping ring (43), the fixed rod (1) is arranged in the fixed rod clamping ring (43), and the upper end of the fixed rod (1) is provided with a limiting ring (2).

10. The screening machine of claim 1, wherein, The transverse vibration instrument (7) comprises a transverse telescopic rod (71), a motion converter (72), a first motor (73) and a transverse vibration operation table (13); the output shaft of the first motor (73) is connected with an internal gear, the internal gear is connected with the motion converter (72) in a meshing mode, the motion converter (72) is hinged to one end of the transverse telescopic rod (71), the other end of the transverse telescopic rod (71) is connected with the side wall of the screening box (4); the first motor (73) is signal-connected with the transverse vibration operation table (13), and the transverse vibration operation table (13) is used for controlling the rotating speed of the first motor (73).

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