A kind of engineering construction raw material screening machine

Abstract

The present invention provides a construction material screening machine, including a frame body, a multi-stage screen assembly, a crushing mechanism, a driving mechanism and a shaking mechanism, a collision mechanism is compounded on one side of the shaking mechanism, an eccentric shaft is fixed to the toothed disc at the output end of the driving mechanism, a bearing sleeve is provided outside the eccentric shaft, the sleeve is connected to a push-pull rod, a hinge seat is fixed on a joint plate, and the push-pull rod is hinged in the hinge seat; an electromagnet is fixed at the bottom of the cylindrical cavity of the eccentric shaft, a cone is matched and provided in the cylindrical cavity, a radially extending assembly is installed on the side wall of the cylindrical cavity, a Z-shaped swing rod is hinged on the push-pull rod, a roller is installed at the rear end thereof, and an elastic traction mechanism and a collision hammer are connected at the front end. The present invention utilizes a driving mechanism and a shaking mechanism to realize reciprocating shaking, so that the screening energy is concentrated on the screen layer, the stability of the whole machine is not affected, the energy is only transmitted to the screen layer, the effective utilization of the vibration energy is ensured, and the hammering function realized by the collision mechanism effectively prevents the screen layer from being blocked.

Description

Technical Field

[0001] The invention belongs to the technical field of coarse and fine screening and sorting equipment, and in particular relates to a raw material screening machine for engineering construction. Background Art

[0002] The screening of construction materials is an essential part of construction projects. Its purpose is to classify the raw materials into different grades according to their particle size so that they can be used reasonably in construction. This can not only improve the utilization efficiency of materials and ensure the quality of the project, but also reduce resource waste. The construction material screening machine is a device specially used for screening various construction materials. By setting screens with different apertures, multi-level screening of raw materials can be achieved. Existing construction material screening machines usually include single or multi-layer screens to screen the raw materials by vibration or rotation. Materials of different particle sizes have different uses in construction, such as coarse-grained materials (gravel, crushed stone, usually with a particle size greater than 20 mm), as concrete aggregates: improve the strength and stability of concrete. As basic fillers, they are used for filling roads, bridges and building foundations, providing good bearing capacity and drainage performance. Medium-sized materials (sand, with a particle size between 520 mm) are used as mortar for masonry and plastering, providing appropriate bonding and construction performance. As concrete fine aggregate, they enhance the density and strength of concrete. Fine-grained materials (fine sand, with a particle size of less than 5 mm) are used as fine mortar for fine masonry and plastering to provide a smooth surface and high adhesion. They are used as floor materials for self-leveling floors and ground leveling layers to provide a flat construction surface. They are used as caulking materials to fill brick joints and stone joints to prevent water infiltration and improve aesthetics. Ultrafine-grained materials (powdered materials, with a particle size of less than 0.075 mm) are used as concrete admixtures, such as silica fume and fly ash, to improve the working performance and durability of concrete. They are used as mortar and concrete reinforcing agents to improve the strength and impermeability of materials. They are used as caulking agents to fill the joints between tiles and stones to provide waterproof and decorative effects.

[0003] In actual applications, the existing screening machines generally have the following problems and shortcomings, especially when performing multi-stage screening: 1. Mesh blockage problem: Due to the different apertures of the screen layers, the screens of different layers are easily blocked during the screening process, affecting the screening efficiency; 2. Difficult to clean: The multi-layer screen structure is fixed, and the blockage inside the screen is difficult to clean manually, resulting in maintenance difficulties and long downtime; 3. Vibration energy dispersion: Existing screening machines usually achieve screening through vibration of the whole machine, which leads to dispersion of vibration energy, poor screening effect, and greater wear and tear on the equipment; 4. Insufficient dust control: The dust generated during the crushing process is easy to overflow, pollute the environment, and affect the health of operators.

[0004] In view of these deficiencies in the prior art, it is very necessary to improve the engineering construction raw material screening machine to achieve more efficient multi-stage screening, easy cleaning and maintenance, prevent screen clogging, and effectively control dust. Summary of the invention

[0005] In view of the common defects and problems of existing similar products, the present invention provides a construction raw material screening machine, which aims to improve the raw material processing efficiency and accuracy through a combination of multi-stage screening and crushing, prevent screen clogging, facilitate cleaning, and ensure stable and efficient screening of construction raw materials.

[0006] The solution of the present invention to solve the technical problem is: adopt a construction material screening machine, including a frame body, a multi-stage screen assembly, a crushing mechanism, a driving mechanism and a shaking mechanism, and a collision mechanism is compounded on one side of the shaking mechanism, the shaking mechanism includes an eccentric shaft, a toothed disc is installed at the output end of the driving mechanism, an eccentric shaft is fixed at the eccentric position of the side of the toothed disc, a bearing is set on the outer side of the eccentric shaft, a shaft sleeve is set on the outer side of the bearing, a push-pull rod is connected to the shaft sleeve, a connected plate is arranged on the multi-stage screen assembly, a hinge seat is fixed on the connected plate, and the push-pull rod is hinged in the hinge seat through a pin shaft; the collision mechanism includes an electromagnet, a cone, an elastic traction mechanism, a radial extension assembly and a Z-shaped rocker arm, a cylindrical cavity is arranged on the inner side of the eccentric shaft, and a cylindrical cavity is arranged on the inner side of the cylindrical cavity. An electromagnet is fixed at the bottom of the column cavity, and a cone is matched in the cylindrical cavity, and the inner side of the cone is a conical surface; at least one radial extension component is installed on the side wall of the cylindrical cavity. When the controller controls the electromagnet to generate attraction for the cone, the cone moves inward, and the inner ends of one or more radial extension components are driven by the conical surface inside the cone, so that the radial extension components extend outward; a Z-shaped pendulum is hinged on the push-pull rod, and a roller is installed at the rear end of the Z-shaped pendulum, which fits the surface of the eccentric shaft and rolls along the outer surface of the eccentric shaft, and the front end of the Z-shaped pendulum is connected to the tension spring seat on the connected plate through an elastic traction mechanism; at the same time, an impact hammer is fixed at the front end of the Z-shaped pendulum, and the impact hammer is pressed against the outer surface of the connected plate.

[0007] Preferably, a guide column is fixed at the bottom center of the cylindrical cavity, a guide hole is provided at the center of the cone, the guide hole is sleeved on the outside of the guide column, and an outer stop is fixed at the outer end of the guide column to prevent the cone from falling off the guide column.

[0008] Preferably, a spring is mounted on the guide column so that the cone moves outward in a natural state.

[0009] Preferably, the radially extending component is a radial pin component, and inclined surfaces are provided on the inner and outer sides of the radial pin component. When the controller controls the electromagnet to generate attraction on the cone, the cone moves inward, and the inclined surfaces at the inner ends of one or more radial pin components are driven by the conical surface inside the cone, so that the radial pin component extends outward. Otherwise, the inner ends of each radial pin component have no supporting function capability.

[0010] Preferably, the radial pin assembly includes a pin body, which is matched with the radial hole in the side wall of the cylindrical cavity. An outer conical surface is arranged at the outer end of the pin body, and an outer stop is arranged between the pin body and the outer conical surface. An inner conical surface is arranged at the inner end of the pin body, and an inner stop is arranged between the pin body and the inner conical surface. The outer stop is located at the outer end of the radial hole, and the inner stop is located at the inner end of the radial hole. An inner support surface is arranged on the inner end ring of the pin body. When the cone is attracted to move inward, the inner support surface is supported on the circumferential surface of the cone to form a fixed support relationship.

[0011] Preferably, the frame body comprises a rectangular frame, and connecting seats are respectively fixed on the left and right side top beams of the rectangular frame, and the connecting seats are fixedly connected to the left and right outer side walls of the multi-stage screen assembly through hangers; the multi-stage screen assembly comprises an outer frame, a screen layer and a connected plate, and the multiple screen layers are fixed as a whole through multiple connected plates at the ends and the middle, and a bottom ring frame is fixed at the bottom periphery of the outer frame, and the bottom ring frame is an annular structure, and a spring seat is arranged at the periphery of the bottom ring frame and each spring seat is supported at the bottom periphery of the screen layer connected structure by a supporting spring, and a series of suspension rods are hinged at the upper left and right sides of the outer frame, and the lower end of each suspension rod is respectively hinged to the top or side of the screen layer connected structure.

[0012] Preferably, an inclined top plate is fixed on the top of the outer frame of the multi-stage screen assembly, an inlet is arranged on the upper rear side of the inclined top plate, a diverter bucket is arranged on the bottom of the outer frame, the front end outlet of each screen layer is respectively connected to the corresponding diverter bucket, and a flexible isolation belt is connected to the outlet end of each screen layer, and the lower end of the flexible isolation belt is sealed and connected to the corresponding diverter bucket.

[0013] Preferably, a gantry is fixed to the upper front part of the rectangular frame, flip supports are installed on both sides of the gantry, and a cover plate is hinged to the upper front part of the inclined top plate. When the cover plate is flipped upward, the flip supports are rotated to support both sides of the cover plate. By opening the cover plate, the internal situation of the multi-stage screen assembly can be observed, and it can be used for auxiliary cleaning.

[0014] Preferably, the frame body includes a driving box and a crushing box, the driving box is fixed on the rear side of the rectangular frame, and the crushing box is fixed on the upper side of the driving box; the driving mechanism is installed in the driving box, and the crushing mechanism is installed in the crushing box, a fixing seat is fixed on the inner bottom plate of the crushing box of the crushing mechanism, a crushing motor is fixed on the rear side of the fixing seat, a crushing chamber is fixed on the front side of the fixing seat, a central rotating shaft is installed in the middle of the inner side of the crushing chamber through a bearing, the central rotating shaft extends out of the crushing chamber and is connected to the crushing motor, and the central rotating shaft is located at the bottom of the crushing box. A central disc frame is fixed to the inner cavity of the crushing chamber, and a plurality of side shafts are axially dispersed and fixed around the central disc frame, with a crushing hammer intersecting each side shaft; a side door is hinged on the front side of the crushing chamber, and a feed hopper is installed on the side door. At the same time, a plurality of inclined plates are fixed on the top of the crushing box, and the lower part of the inclined plates is connected to the edge of the chute, and the chute is fixed to the top of the crushing chamber. The lower discharge port of the chute is connected to the feed hopper, and enters the crushing chamber through the feed hopper. A discharge port is arranged at the bottom of the crushing chamber, and the discharge port is connected to the inlet of the multi-stage screen assembly.

[0015] Beneficial effects of the present invention: 1. Independent screen layer movement: The support structure of the multi-layer screen connected plate uses supporting springs and hangers to ensure the stability of the screen layer and the screening effect, and avoid damage caused by uneven force. The screen layer is a swingable part, and a driving mechanism and a shaking mechanism are used to achieve reciprocating shaking, so that the screening energy is concentrated on the screen layer, which does not affect the stability of the whole machine and enhances the screening effect. Precise control of the screen layer: The design of the driving mechanism ensures the precise reciprocating motion of the screen layer, ensures the stability and efficiency of the screening process, and adapts to the screening requirements of different raw materials. Efficient vibration transmission: The screening vibration energy is only transmitted to the screen layer and is not absorbed by the whole machine, ensuring the effective use of vibration energy, improving the screening effect, and saving energy.

[0016] 2. Anti-clogging design: The hammering function realized by the impact mechanism effectively prevents the mesh of the screen layer from being blocked, ensuring the continuity and efficiency of the screening process, so that the multi-layer screening mechanism can be used effectively. In addition, the design of an openable cover facilitates the cleaning and maintenance of the interior of the multi-stage screen assembly, which improves the operability and service life of the equipment.

[0017] 3. Improve screening efficiency: The integrated crushing mechanism can crush large pieces of raw materials before screening, reducing the blockage of the screen by large particles, improving the overall screening effect and ensuring efficient processing. The multi-stage screen assembly combines multiple screen layers and conjoined plates, allowing the raw materials to be screened multiple times, significantly improving the screening efficiency and accuracy, and meeting the screening needs of raw materials of different particle sizes.

[0018] 4. Effective dust control: The suction part installed in the crushing chamber maintains a slight negative pressure state in the room through the negative pressure suction mechanism, effectively controls dust spillage and improves the cleanliness of the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the raw material screening machine of the present invention;

[0020] Figure 2 yes Figure 1 One of the internal structure diagrams;

[0021] Figure 3 yes Figure 1 Schematic diagram of the internal structure of the second;

[0022] Figure 4 yes Figure 3 A front view of

[0023] Figure 5 yes Figure 4 Schematic diagram of the AA section structure;

[0024] Figure 6 yes Figure 2 Side view of the middle crushing mechanism;

[0025] Figure 7 yes Figure 5 Schematic diagram of the assembly relationship between the middle driving mechanism and the shaking mechanism;

[0026] Figure 8 It is a structural schematic diagram of an impact mechanism;

[0027] Fig. 9 yes Figure 6 Schematic diagram of the internal structure of the middle crushing chamber;

[0028] Fig.10 yes Figure 5 The enlarged structural diagram of the middle B part;

[0029] Fig.11 It is a structural schematic diagram of another impact mechanism.

[0030] Numbers in the figure: frame body 1; multi-stage screen assembly 2; crushing mechanism 3; driving mechanism 4; shaking mechanism 5; impact mechanism 6; output mechanism 8; flip pin assembly 9; rectangular frame 11; driving box 12; crushing box 13; inclined plate 14; gantry 15; flip support 151; fixed support 16; inclined top plate 17; cover plate 18; hanging piece 19; outer frame 21; screen layer 22; conjoined plate 23; bottom ring frame 24; supporting spring 25; hanging rod 26; inlet 27; diverter bucket 28; flexible isolation belt 29; fixed seat 31; crushing motor 32; crushing chamber 33; side door 34; feed hopper 35; chute 36; center disc frame 37; breaker hammer 38; suction part 39 ; shaft seat 41; shaking motor 42; driving gear 43; driven gear 44; toothed disc 45; eccentric shaft 51; bearing 52; bushing 53; push-pull rod 54; hinged seat 55; pin shaft 56; electromagnet 60; cylindrical cavity 61; conical body 62; guide column 63; guide hole 64; elastic traction mechanism 65; radial pin assembly 66; pin body 661; outer cone 662; outer stop 663; inner cone 664; inner stop 665; inner support surface 666; Z-shaped rocker 67; roller 68; impact hammer 69; pulley frame 81; output motor 82; isolation output belt 83; flip shaft 91; flip sheet 92; push inclined surface 93; support inclined surface 94; give way groove 95. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] Embodiment 1: A construction material screening machine, such as Figure 1-3 As shown, the machine mainly includes a frame body 1, a multi-stage screen assembly 2, a crushing mechanism 3, a driving mechanism 4 and a shaking mechanism 5. Figure 1 As shown, the frame body 1 includes a rectangular frame 11, a driving box 12, a crushing box 13, an inclined plate 14 and a gantry 15. The driving box 12 is fixed to the rear side of the rectangular frame 11, and the crushing box 13 is fixed to the upper side of the driving box 12.

[0033] A multi-stage screen assembly 2 is fixedly installed in the rectangular frame 11. Figure 3 It is shown in the figure that the top beams on the left and right sides of the rectangular frame 11 are respectively fixed with connecting seats, and the connecting seats are fixedly connected to the left and right outer walls of the multi-stage screen assembly 2 through the hanging parts 19. Figure 5 and Fig.10As shown, the multi-stage screen assembly 2 includes an outer frame 21, a screen layer 22, a conjoined plate 23, a bottom ring frame 24, a support spring 25, a suspension rod 26, an inlet 27 and a diverter 28. The multi-layer screen layer 22 is fixed as a whole by a plurality of conjoined plates 23 at the end and the middle. A bottom ring frame 24 is fixed at the bottom periphery of the outer frame 21, and the bottom ring frame 24 is an annular structure. A spring seat is arranged at the periphery of the bottom ring frame 24, and each spring seat is supported at the bottom periphery of the conjoined structure of the screen layer 22 by a support spring 25. A series of suspension rods 26 are hinged at the upper left and right sides of the outer frame 21, and the lower end of each suspension rod 26 is respectively hinged to the top or side of the conjoined structure of the screen layer 22. Thus, the conjoined structure of the screen layer 22 and the outer frame 21 are two independent parts. Among them, the screen layer 22 is a swingable part, and the outer frame 21 is a non-swinging part.

[0034] The top of the outer frame 21 is fixed with an inclined top plate 17, an inlet 27 is arranged at the upper rear side of the inclined top plate 17, and a plurality of diverter buckets 28 are arranged at the bottom of the outer frame 21, and the outlet end of each screen layer 22 is respectively connected to a corresponding diverter bucket 28. At the connection between the outlet position of each screen layer 22 and the diverter bucket 28, a flexible isolation belt 29 is used to seal the connection.

[0035] At the same time, a diverter 28 is also installed below the lowest screen layer, and the edge of the diverter 28 is connected to the frame of the screen layer.

[0036] A gantry 15 is fixed to the upper front part of the rectangular frame 11, and flip supports 151 are installed on both sides of the gantry 15. A cover plate 18 is hinged to the upper front part of the inclined top plate 17. When the cover plate 18 is flipped up, the flip supports 151 are rotated to support both sides of the cover plate 18. By opening the cover plate 18, the internal situation of the multi-stage screen assembly 2 can be observed, and it is used for auxiliary cleaning.

[0037] Since the front side of the outer frame 21 is inclined downward, when the sorted construction materials are output from the front end of the outer frame 21, the stored materials in the diversion bucket 28 will cause the front end of the outer frame 21 to have a larger gravity. A fixed support 16 is fixed to the front side of the outer frame 21, and the fixed support 16 is supported on the ground.

[0038] An output mechanism 8 is installed at the bottom of the multi-stage screen assembly 2. The output mechanism 8 includes a pulley frame 81, an output motor 82 and an isolation output belt 83. A plurality of partitions are arranged longitudinally on the upper side of the pulley frame 81. The area between adjacent partitions is provided with pulleys in front and back. A transmission belt is sleeved on each set of pulleys. The output motor 82 drives each pulley to rotate, thereby driving each transmission belt to rotate. Figure 4 As shown, each conveyor belt is located directly below each diverter bucket 28.

[0039] like Figure 5As shown, a driving mechanism 4 is fixed inside the driving box 12, and other areas inside the driving box 12 are used as tool storage areas. The driving mechanism 4 drives the screen layer 22 conjoined structure to achieve reciprocating shaking through a shaking mechanism 5. The driving mechanism 4 includes an axle seat 41, a shaking motor 42, a driving gear 43, a driven gear 44 and a toothed disc 45. A shaking motor 42, a driving gear 43 and a driven gear 44 are installed on the axle seat 41, the rotating shaft of the shaking motor 42 is installed together with the driving gear 43, the driving gear 43 is meshed with the driven gear 44, a toothed disc 45 is fixed on the side of the driven gear 44, and a shaking mechanism 5 is connected to the side of the toothed disc 45.

[0040] like Figure 7 As shown, the shaking mechanism 5 includes an eccentric shaft 51, a bearing 52, a sleeve 53, a push-pull rod 54, a hinge seat 55 and a pin 56. An eccentric shaft 51 is fixed at an eccentric position on the side of the toothed disc 45, a bearing 52 is sleeved on the outside of the eccentric shaft 51, a sleeve 53 is sleeved on the outside of the bearing 52, and a push-pull rod 54 is connected to the sleeve 53. Therefore, when the toothed disc 45 rotates, the eccentric shaft 51 moves along the circumference, and the eccentric shaft 51 and the sleeve 53 are in a state of relative rotation. A hinge seat 55 is fixed on the joint plate 23, and the push-pull rod 54 is hinged in the hinge seat 55 through the pin 56. Therefore, when the shaft seat 41 rotates, the eccentric shaft 51 is driven to move along the axis of the toothed disc 45 through the toothed disc 45, driving the push-pull rod 54 to push and pull, and then driving the joint plate 23 to reciprocate. Since the outer frame 21 cannot swing, and the connected plate 23 carrying each screen layer 22 can swing back and forth, the entire device does not absorb the driving force from the driving mechanism 4 and the shaking mechanism 5. In the prior art, the vibration energy of the vibrating screen is achieved by vibrating the entire machine, but the present solution transfers the vibration energy only to the screen layer 22, and the vibration energy will not be absorbed by the entire machine.

[0041] Based on the above scheme, when driving the conjoined plate 23 and the multi-layer screen layer 22 to move back and forth, a hammering function is also added. One hammering method uses an impact mechanism 6, Figure 7 As shown in FIG. 1 , a striking mechanism 6 is compounded on one side of the shaking mechanism 5 . Figure 8The specific structure of the impact mechanism 6 shown in FIG. 6 includes an electromagnet 60, a cylindrical cavity 61, a cone 62, a guide post 63, a guide hole 64, an elastic traction mechanism 65, a radial pin assembly 66, a Z-shaped rocker 67, a roller 68, and an impact hammer 69. Specifically, a cylindrical cavity 61 is provided on the inner side of the eccentric shaft 51, a guide post 63 is fixed at the bottom center of the cylindrical cavity 61, and a ring-shaped electromagnet 60 is fixed at the bottom of the cylindrical cavity 61 and located at the outer area of ​​the guide post 63. The electromagnet 60 is controlled by a controller. A cone 62 is matched and fitted in the cylindrical cavity 61, and the inner side of the cone 62 is a conical surface. A guide hole 64 is provided in the center of the cone 62, and the guide hole 64 is fitted on the outer side of the guide post 63. An outer stopper is fixed at the outer end of the guide post 63 to prevent the cone 62 from falling off the guide post 63. At least one radial pin assembly 66 is installed on the side wall of the cylindrical cavity 61. The inner and outer sides of the radial pin assembly 66 are provided with inclined surfaces. When the controller controls the electromagnet 60 to generate an attractive force on the cone 62, the cone 62 moves inward, and the inclined surfaces at the inner ends of one or more radial pin assemblies 66 are driven by the conical surface inside the cone 62, so that the radial pin assembly 66 extends outward. Otherwise, the inner ends of the radial pin assemblies 66 have no supporting function. A spring can be optionally installed on the outer side of the guide column 63, so that the cone 62 moves outward in a natural state.

[0042] A Z-shaped swing rod 67 is hinged on the push-pull rod 54, and a roller 68 is installed at the rear end of the Z-shaped swing rod 67. The roller 68 is attached to the surface of the eccentric shaft 51 and rolls along the outer surface of the eccentric shaft 51. The front end of the Z-shaped swing rod 67 is connected to the tension spring seat on the connected plate 23 through the elastic traction mechanism 65. At the same time, a striker 69 is fixed to the front end of the Z-shaped swing rod 67. Usually, under the tension of the elastic traction mechanism 65, the striker 69 is pressed against the outer surface of the connected plate 23. When the roller 68 is supported by the radial pin assembly 66 to swing outward, it can drive the front end of the Z-shaped swing rod 67 to overcome the tension of the tension spring and also swing outward. When the roller 68 suddenly falls off from the radial pin assembly 66, under the tension of the elastic traction mechanism 65, the striker 69 strikes the connected plate 23, causing the connected plate 23 to vibrate. The vibration of the connected plate 23 will drive all the screen layers 22 to vibrate.

[0043] Based on the above scheme, the driving mechanism 4 drives the shaking mechanism 5, which can drive the connected plate 23 to move back and forth, and realize the basic function of screening. Due to the reciprocating screening process, the problem of mesh blocking cannot be avoided, but the controller controls the electromagnet 60 according to needs or timing, and drives one or more radial pin assemblies 66 to extend outward by moving the cone 62, which can cause the Z-shaped swing rod 67 to swing, thereby producing a hammering effect on the connected plate 23. Therefore, the hammering effect is used to avoid the mesh blocking of each layer of the screen layer 22.

[0044] Figure 8 A structural form of a radial pin assembly 66 is shown in the figure, which includes a pin body 661, which is matched with the radial hole of the side wall of the cylindrical cavity 61, an outer cone 662 is arranged at the outer end of the pin body 661, an outer stop 663 is arranged between the pin body 661 and the outer cone 662, an inner cone 664 is arranged at the inner end of the pin body 661, an inner stop 665 is arranged between the pin body 661 and the inner cone 664, the outer stop 663 is located at the outer end of the radial hole, the inner stop 665 is located at the inner end of the radial hole, and an inner support surface 666 is arranged on the inner end ring of the pin body 661. When the cone 62 is attracted to move inward, the inner support surface 666 is supported on the circumferential surface of the cone 62 to form a fixed support relationship. When the roller 68 rolls along the surface of the eccentric shaft 51, when the radial pin assembly 66 is not in contact with the roller 68, the electromagnet 60 generates an attractive force on the cone 62, which can attract the cone 62 to the bottom of the cylindrical cavity 61. In the process of the cone 62 moving to the bottom of the cylindrical cavity 61, the inner conical surface 664 of the radial pin assembly 66 is first driven by the conical surface of the cone 62, so that each radial pin assembly 66 extends outward in the radial direction, and finally, the circumferential side wall of the cone 62 is supported on the inner support surface 666 of each radial pin assembly 66. In this state, the radial pin assembly 66 cannot shrink inward. When the radial pin assembly 66 rotates to the position of the roller 68, the outer conical surface 662 of the radial pin assembly 66 can gradually lift the roller 68. After the roller 68 is lifted, the front end of the Z-shaped swing rod 67 can swing outward, overcome the pulling force of the elastic traction mechanism 65, and make the impact hammer 69 separate from the surface of the connected plate 23. When the radial pin assembly 66 continues to rotate with the eccentric shaft 51 , the roller 68 will instantly fall from the top of the radial pin assembly 66 , so that the impact hammer 69 will instantly hit the connected plate 23 , generating an impact force on the connected plate 23 .

[0045] In addition, the radial pin assembly 66 may be replaced by a flip pin assembly 9, such as Fig.11 As shown, the flip pin assembly 9 includes a flip shaft 91, a flip sheet 92, a push inclined surface 93 and a support inclined surface 94. A clearance groove 95 is provided on the side wall of the eccentric shaft 51, and a flip shaft 91 is fixed at the root of the clearance groove 95. A flip sheet 92 is installed on the flip shaft 91. When the flip sheet 92 is in a retracted state, it can be inserted into the clearance groove 95. After the flip sheet 92 is unfolded, it is located outside the clearance groove 95. The inner side surface of the flip sheet 92 is a push inclined surface 93. When the push inclined surface 93 is pushed by the conical surface of the cone 62, the flip sheet 92 can be driven to flip outward. A support inclined surface 94 is provided at the root of the flip sheet 92. When the flip sheet 92 is in the maximum flip state, the support inclined surface 94 is supported on the circumferential side surface of the cone 62 to form a fixed support relationship. By flipping, the pushing amplitude of the roller 68 can be expanded as much as possible.

[0046] like Figure 6 and Fig. 9 As shown, the pulverizing mechanism 3 includes a fixed seat 31, a pulverizing motor 32, a pulverizing chamber 33, a side door 34, a feed hopper 35, a chute 36, a central disc frame 37, a crushing hammer 38 and a suction part 39. The fixed seat 31 is fixed on the inner bottom plate of the pulverizing box 13, the pulverizing motor 32 is fixed on the rear side of the fixed seat 31, the pulverizing chamber 33 is fixed on the front side of the fixed seat 31, a central rotating shaft is installed in the middle of the inner side of the pulverizing chamber 33 through a bearing, the central rotating shaft is connected to the rotating shaft of the pulverizing motor 32 through a coupling, the central rotating shaft is located in the inner cavity of the pulverizing chamber 33, a central disc frame 37 is fixed, a plurality of side shafts are axially dispersedly fixed around the central disc frame 37, and a crushing hammer 38 is connected to each side shaft. When the pulverizing motor 32 rotates, it can drive the central disc frame 37 to rotate. Under the action of centrifugal force, a plurality of crushing hammers 38 are respectively spread outward to impact and crush larger materials. A side door 34 is hinged at the front side of the crushing chamber 33, and a feed hopper 35 is installed on the side door 34. At the same time, a plurality of inclined plates 14 are fixed on the top of the crushing box 13, and the lower part of the inclined plates 14 is connected to the edge of the chute 36. The chute 36 is fixed to the top of the crushing chamber 33. The lower discharge port of the chute 36 is connected to the feed hopper 35, and the material enters the crushing chamber 33 through the feed hopper 35. A discharge port is provided at the bottom of the crushing chamber 33, and the discharge port is connected to the inlet 27. Fig. 9 As shown, at the upper and / or lower part of the rear side wall of the crushing chamber 33, there is a suction part 39, which includes a temporary storage chamber, in which filter cotton is installed, and one side wall of the temporary storage chamber is connected to the inner cavity of the crushing chamber 33 through an introduction channel, and the other side of the temporary storage chamber is connected to the negative pressure suction mechanism. Thus, the inner cavity of the crushing chamber 33 can be in a slightly negative pressure state to prevent dust from flying outward.

[0047] Based on the above engineering construction raw material screening machine solution, the specific implementation steps are as follows:

[0048] 1. Installation and commissioning. Install the screening machine on a flat surface to ensure the stability of the equipment. Turn on the power supply, check the connection and operation of each component, and ensure that the components such as the crushing motor 32, the screen layer 22, and the shaking mechanism 5 are working properly. Adjust the screen layer 22 of the multi-stage screen assembly 2 to ensure that the aperture of each layer of the screen meets the requirements.

[0049] 2. Raw material loading. The raw materials to be screened are loaded into the crushing chamber 33 through the feed hopper 35. The crushing motor 32 is started to drive the central disc frame 37 and the crushing hammer 38 to rotate, and the bulk raw materials are crushed to meet the screening requirements.

[0050] 3. Screening operation. The crushed raw material enters the inlet 27 of the multi-stage screen assembly 2 through the chute 36. The driving mechanism 4 is started, and the screen layer 22 is driven to shake back and forth through the shaking mechanism 5 to start the screening process. The raw material passes through the screen layers with different apertures on the screen layer 22 to achieve multi-stage screening, and the coarse particle size material, medium particle size material, fine particle size material and ultra-fine particle size material are discharged from the diversion bucket 28 of each layer of the screen respectively.

[0051] 4. Anti-blocking treatment. During the screening process, the controller controls the electromagnet 60 as needed or at a fixed time, drives the cone 62 to move, and causes the Z-shaped swing rod 67 to swing through the radial pin assembly 66, hitting the conjoined plate 23, achieving a hammering effect to prevent the mesh of the screen layer 22 from being blocked. The hammering action ensures that the screen layer 22 remains unobstructed during the screening process, thereby improving the screening efficiency and effect.

[0052] 5. Dust control. The suction part 39 of the crushing chamber 33 is activated to form a slight negative pressure state, effectively controlling the dust overflow and keeping the working environment clean. The filter cotton in the temporary storage chamber is replaced regularly to ensure the suction effect.

[0053] 6. Cleaning and maintenance. Open the cover plate 18 on the gantry 15 regularly, check and clean the inside of the multi-stage screen assembly 2 to ensure the normal operation of the equipment. Check and replace the supporting spring 25, suspension rod 26 and other wearing parts to ensure the stability and screening effect of the screen layer 22. Lubricate and maintain the drive components such as the shaft seat 41 and the shaking motor 42 to extend the service life of the equipment.

[0054] 7. Output and collection. Start the output mechanism 8 to transport the screened materials from the diverter 28 to the corresponding storage area through the conveyor belt. Adjust the running speed of the output mechanism 8 and the position of the conveyor belt according to the screening requirements to ensure the effective collection and classification of various materials.

[0055] Through the above steps, the engineering construction raw material screening machine can efficiently and stably perform multi-stage screening of raw materials to ensure the best use of materials in construction. Through the multi-stage screen layer 22, accurate screening of raw materials with different particle sizes is achieved to improve material utilization efficiency. The hammer mechanism is used to effectively prevent the screen layer from being blocked to ensure the continuity of the screening process. Dust spillage is effectively controlled during the crushing process to improve the working environment. Modular design and convenient cleaning methods reduce maintenance difficulty and downtime. The drive mechanism and support structure ensure that the screening process is stable and efficient and extend the service life of the equipment.

[0056] The above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modification, equivalent substitution, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction material screening machine, comprising a frame body (1), a multi-stage screen assembly (2), a crushing mechanism (3), a driving mechanism (4) and a shaking mechanism (5), characterized in that: An impact mechanism (6) is installed on one side of the shaking mechanism (5), the shaking mechanism (5) comprising an eccentric shaft (51), a toothed disc (45) is installed at the output end of the driving mechanism (4), an eccentric shaft (51) is fixed at an eccentric position on the side of the toothed disc (45), a bearing (52) is sleeved on the outside of the eccentric shaft (51), a shaft sleeve (53) is sleeved on the outside of the bearing (52), a push-pull rod (54) is connected to the shaft sleeve (53), and a connecting rod (54) is provided on the multi-stage screen assembly (2). The body plate (23) is provided with an articulated seat (55) fixed on the connected body plate (23). The push-pull rod (54) is articulated in the articulated seat (55) via a pin shaft (56). When the toothed disc (45) rotates, the eccentric shaft (51) moves along a circle, and the eccentric shaft (51) and the shaft sleeve (53) rotate relative to each other. The impact mechanism (6) includes an electromagnet (60), a cone (62), an elastic traction mechanism (65), a radial extension component and a Z-shaped swing rod (67). A cylindrical cavity (61) is arranged on the inner side of the eccentric shaft (51), an electromagnet (60) is fixed at the bottom of the cylindrical cavity (61), a cone (62) is matched and fitted in the cylindrical cavity (61), and the inner side of the cone (62) is a conical surface; at least one radially extending component is installed on the side wall of the cylindrical cavity (61), and when the electromagnet (60) is controlled to generate an attractive force on the cone (62), the cone (62) moves inward, and the cone (62) is moved inward by the cone (62). ) to drive the inner ends of one or more radially extending components through the conical surface on the inner side thereof, so that the radially extending components extend outward; a Z-shaped swing rod (67) is hingedly connected to the push-pull rod (54); a roller (68) is installed at the rear end of the Z-shaped swing rod (67); the roller (68) is fitted to the surface of the eccentric shaft (51) and rolls along the outer surface of the eccentric shaft (51); and the front end of the Z-shaped swing rod (67) is connected to a tension spring seat on the connected plate (23) through an elastic traction mechanism (65);At the same time, a striking hammer (69) is fixed at the front end of the Z-shaped swing rod (67), and the striking hammer (69) is pressed against the outer surface of the connected plate (23). A guide column (63) is fixed at the center of the cylindrical cavity (61). A guide hole (64) is provided at the center of the conical body (62). The conical body (62) is mounted on the outer side of the guide column (63) through the guide hole (64). An outer stopper is fixed at the outer end of the guide column (63) to prevent the conical body (62) from falling off the guide column (63). A spring is mounted on the guide column (63), so that the conical body (62) moves outward in a natural state. The radial extension The output assembly is a radial pin assembly (66), and the inner and outer sides of the radial pin assembly (66) are both provided with inclined surfaces. When the control electromagnet (60) generates an attractive force on the cone (62), the cone (62) moves inward, and the inclined surfaces at the inner ends of one or more radial pin assemblies (66) are driven by the conical surface on the inner side of the cone (62), so that the radial pin assemblies (66) extend outward. Otherwise, the inner ends of the radial pin assemblies (66) have no supporting function. When the roller (68) is supported by the radial pin assembly (66) to swing outward, the front end of the Z-shaped swing rod (67) can be driven to overcome the tension of the tension spring and also swing outward. When the roller (68) is supported by the radial pin assembly (66) to swing outward, the front end of the Z-shaped swing rod (67) can be driven to overcome the tension of the tension spring and also swing outward. When (68) suddenly falls off from the radial pin assembly (66), under the pulling force of the elastic traction mechanism (65), the impact hammer (69) impacts the connected plate (23), causing the connected plate (23) to vibrate. The radial pin assembly (66) includes a pin body (661), the pin body (661) is matched and fitted in the radial hole of the side wall of the cylindrical cavity (61), an outer conical surface (662) is provided at the outer end of the pin body (661), an outer stopper (663) is provided between the pin body (661) and the outer conical surface (662), an inner conical surface (664) is provided at the inner end of the pin body (661), and the pin body (661) and the inner conical surface are connected to each other. An inner stop (665) is arranged between the pin body (664), the outer stop (663) is located at the outer end of the radial hole, and the inner stop (665) is located at the inner end of the radial hole. An inner support surface (666) is arranged on the inner end ring of the pin body (661). When the conical body (62) is attracted to move inward, the inner support surface (666) is supported on the circumferential surface of the conical body (62) to form a fixed support relationship. The frame body (1) includes a rectangular frame (11). Connecting seats are respectively fixed to the top beams on the left and right sides of the rectangular frame (11). The connecting seats are fixedly connected to the left and right outer side walls of the multi-stage screen assembly (2) through a hanging piece (19);The multi-stage screen assembly (2) comprises an outer frame (21), a screen layer (22) and a conjoined plate (23), wherein the multiple screen layers (22) are fixed as a whole through a plurality of conjoined plates (23) at the end and the middle, a bottom ring frame (24) is fixed at the bottom periphery of the outer frame (21), the bottom ring frame (24) is an annular structure, a spring seat is arranged at the periphery of the bottom ring frame (24), and each spring seat is supported at the bottom periphery of the conjoined structure of the screen layer (22) through a supporting spring (25), a series of suspension rods (26) are hinged at the upper part of the left and right sides of the outer frame (21), and the lower end of each suspension rod (26) is respectively hinged to the top or side of the conjoined structure of the screen layer (22). ; 2. The engineering construction raw material screening machine according to claim 1, characterized in that: An inclined top plate (17) is fixed on the top of the outer frame (21) of the multi-stage screen assembly (2), an inlet (27) is arranged on the upper part of the rear side of the inclined top plate (17), a diverter hopper (28) is arranged at the bottom of the outer frame (21), the front end outlet of each screen layer (22) is respectively connected to the corresponding diverter hopper (28), a flexible isolation belt (29) is connected to the outlet end of each screen layer (22), and the lower end of the flexible isolation belt (29) is sealed and connected to the corresponding diverter hopper (28).

3. The engineering construction raw material screening machine according to claim 2, characterized in that: A gantry (15) is fixed to the upper front part of the rectangular frame (11), and flip supports (151) are installed on both sides of the gantry (15). A cover plate (18) is hingedly connected to the upper front part of the inclined top plate (17). When the cover plate (18) is flipped upward, the flip supports (151) are rotated to support both sides of the cover plate (18). By opening the cover plate (18), the internal situation of the multi-stage screen assembly (2) can be observed, and it is used for auxiliary cleaning.

4. The engineering construction raw material screening machine according to claim 1, characterized in that: The frame body (1) comprises a drive box (12) and a crushing box (13); the drive box (12) is fixed on the rear side of the rectangular frame (11); the crushing box (13) is fixed on the upper side of the drive box (12); the drive mechanism (4) is installed in the drive box (12); the crushing mechanism (3) is installed in the crushing box (13); a central rotating shaft is installed on the inner side of a crushing chamber (33) of the crushing mechanism (3) through a bearing; the central rotating shaft extends outside the crushing chamber (33) and is connected to a crushing motor (32); a central disk frame (37) is fixed to the portion of the central rotating shaft located in the inner cavity of the crushing chamber (33); a plurality of side shafts are fixed axially dispersedly around the central disk frame (37); a breaker hammer (38) is hinged on each side shaft.

Images