A screening device for blasting engineering

Abstract

The present invention belongs to the field of vibration screening, and particularly relates to a screening device for blasting engineering, which includes a fixed plate, an elastic connecting column, a vibrating screen, a blanking pipe, an exhaust pipe, a collection bin, an air inlet pipe, a connecting pipe, a motor and a fan blade; the stone materials are screened by the vibrating screen and fall into the blanking pipe. The stone materials fall freely in the blanking pipe and pass through the air flow formed by the fan blade, blowing the dust particles in the stone materials into the exhaust pipe; compared with the prior art, the present invention can blow away the dust particles in the screened stone materials, effectively reduce the impurities in the stone materials, produce relatively pure stone materials, and ensure the quality of the stone materials.

Description

Technical Field

[0001] The present invention belongs to the field of vibration screening, and particularly relates to a screening device for blasting engineering. Background Art

[0002] In blasting engineering, stones are usually produced. After being finely processed, these stones can be used in various construction and road projects. The quality and size of the stones directly affect their application scope and value. Therefore, after the blasting engineering is completed, the treatment of the stones has become an important link. First of all, the stones produced by blasting need to be crushed and classified. According to the hardness, density and particle size of the stones, workers will use screening equipment to screen the stones to distinguish the stones suitable for different uses. Currently, vibrating screens are usually used.

[0003] At present, during the screening process of the vibrating screen, a sieve plate with sieve holes is used as the screening structure. Stones that meet the particle size pass through the sieve plate, while those that do not fall through the sieve plate. However, for the stones after blasting, the operation of removing dust particles has not been carried out in time, resulting in a large number of useless dust particles in the stones that meet the particle size after screening. These dust particles or fine gravel not only affect the overall quality of the stones, but also cause additional dust generation and increased transportation weight during the subsequent transportation process. If the dust particles can be further removed during the screening process, the quality of the stones can be greatly improved. However, for the current vibrating screen, the sieve hole diameter of its sieve plate is difficult to meet the function of screening dust particles. Summary of the Invention

[0004] The purpose of the present invention is to provide a screening device for blasting engineering to solve the problems existing in the prior art. To achieve the above invention purpose, the technical solution adopted by the present invention is:

[0005] A screening device for blasting engineering, comprising a fixing plate, elastic connecting columns, a vibrating screen, a feeding pipe, an exhaust pipe, a collection bin, an air inlet pipe, a connecting pipe, a motor and a fan blade;

[0006] A plurality of the elastic connecting columns are installed on the fixing plate, and the elastic connecting columns are connected to the bottom of the vibrating screen;

[0007] The output end of the vibrating screen is connected to the feeding pipe. The feeding pipe is vertically arranged, one side of which is communicated with the air inlet pipe, and the other side is communicated with the connecting pipe. The connecting pipe is communicated with the exhaust pipe. The fan blade is arranged in the air inlet pipe, and the motor is connected to the fan blade;

[0008] The bottom of the feeding pipe is communicated with the collection bin. The material screened by the vibrating screen falls downward into the collection bin through the feeding pipe. The fan blade is used to form a horizontal air flow towards the connecting pipe to blow away the dust particles in the material when it falls.

[0009] Further, the vibrating screen includes a bottom plate, a baffle, a feeding hopper, a top plate, side plates and a screening assembly;

[0010] The bottom of the bottom plate is connected to a plurality of the elastic connecting columns. The two sides of the bottom plate are respectively fixedly connected to the side plates. The tops of the two side plates are fixedly connected to the top plate. One end of the bottom plate is fixedly connected to the baffle, and the baffle is fixedly connected to the ends of the side plates and the top plate;

[0011] The screening assembly is located below the top plate and above the bottom plate; the screening assembly includes an adjustable sieve plate and a fixed sieve plate. The two sides of the fixed sieve plate are respectively fixedly connected to the two side plates. The adjustable sieve plate fits against the bottom surface of the fixed sieve plate. Adjusting rods are respectively arranged on both sides of the adjustable sieve plate. The adjusting rods pass through the side plates and are locked by nuts;

[0012] The adjustable sieve plate and the fixed sieve plate are inclined downward in the direction away from the baffle. The adjustable sieve plate and the fixed sieve plate are both provided with sieve holes, and the sieve holes of the two are arranged staggeredly. The adjustable sieve plate is used for horizontal movement to adjust the size of the overlapping part of the sieve holes;

[0013] The top of the top plate is fixedly connected to the feeding hopper.

[0014] Further, the screening assembly further includes a second guiding vertical plate. One end of the fixed sieve plate away from the baffle is fixedly connected to the second guiding vertical plate. A plurality of the screening assemblies are provided;

[0015] One end of the bottom plate away from the baffle is fixedly connected to a first guiding vertical plate. One end of the top plate away from the baffle is fixedly connected to a third guiding vertical plate. The first guiding vertical plate and the third guiding vertical plate are spaced apart. The second guiding vertical plate is arranged between the two. The first, second and third guiding vertical plates are all vertically arranged;

[0016] A funnel is fixedly connected between the first guiding vertical plate and the second guiding vertical plate, between adjacent two second guiding vertical plates, and between the second guiding vertical plate and the third guiding vertical plate respectively;

[0017] The bottom of the funnel is located on the air flow formed by the fan blades.

[0018] Further, a plurality of partition plates are fixedly connected inside the collection bin. The plurality of partition plates form a plurality of collection chambers inside the collection bin. The plurality of collection chambers respectively correspond to the bottom discharging ends of the funnels and are used for respectively collecting the materials dropped from each funnel.

[0019] Further, the outermost collection chamber communicates with the bottom of the exhaust pipe. The exhaust pipe is vertically arranged. A filter screen is arranged at the top of the exhaust pipe.

[0020] Further, the bottom of the vibrating screen is connected to an eccentric vibration mechanism; the eccentric vibration mechanism includes a rotating ring, eccentric mass blocks, an upper connecting shaft, a lower connecting shaft, fixing pins, insertion pins and springs;

[0021] The bottom of the lower connecting shaft is rotatably connected to the top of the fixing plate, the top of the upper connecting shaft is rotatably connected to the bottom of the bottom plate, the top of the lower connecting shaft and the bottom of the upper connecting shaft are spaced apart, the top of the lower connecting shaft and the bottom of the upper connecting shaft are both located inside the rotating ring, and the inner side surface of the rotating ring is spaced apart from the upper and lower connecting shafts; the upper and lower connecting shafts and the rotating ring are coaxially arranged;

[0022] Two insertion pins are fixedly connected to the side surface of the lower connecting shaft, the two insertion pins are located in the radial direction of the lower connecting shaft, two fixing pins are fixedly connected to the side surface of the upper connecting shaft, the two fixing pins are located in the radial direction of the upper connecting shaft, the fixing pins are fixedly connected to the inner side surface of the rotating ring, the insertion pins are slidably inserted into blind holes, the blind holes are arranged on the inner side surface of the rotating ring, springs are arranged in the blind holes, and the end of the insertion pin abuts against the spring;

[0023] The two insertion pins are located on the same radial line of the rotating ring, the side surface of the rotating ring is fixedly connected to the eccentric mass block, and the eccentric mass block is located in the axial direction of the two insertion pins; the lower connecting shaft is connected to the motor, and when the lower connecting shaft rotates, the rotating ring rotates eccentrically and causes the upper connecting shaft to rotate eccentrically, thereby driving the vibrating screen to vibrate.

[0024] Further, the output end of the motor is fixedly connected to a main shaft, the main shaft is connected to a horizontally arranged transmission shaft through bevel gears, the transmission shaft is fixedly connected to the fan blade, and the top of the main shaft is connected to the lower connecting shaft through a belt; the main shaft is vertically arranged, and the belt and the transmission shaft are both horizontally arranged.

[0025] Further, the elastic connecting column includes a rubber column, the top of the rubber column is connected to the vibrating screen, and the bottom of the rubber column is connected to the fixing plate.

[0026] The present invention has the following beneficial effects: The stone materials are screened by the vibrating screen and fall into the feeding pipe. The stone materials fall freely in the feeding pipe and pass through the air flow formed by the fan blade, and the dust particles in the stone materials are blown into the exhaust pipe; compared with the prior art, the present invention can blow away the dust particles in the screened stone materials, effectively reduce the impurities in the stone materials, produce relatively pure stone materials, and ensure the quality of the stone materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of a fermentation tank;

[0029] Figure 3 It is a schematic diagram when the water filtering hole is opened;

[0030] Figure 4 It is a schematic diagram when the water filtering hole is closed;

[0031] Figure 5 It is a schematic diagram of a heat exchange water tank;

[0032] Figure 6 It is Figure 5 the schematic diagram of the sectional view in the direction of A in

[0033] Figure 7 It is a schematic diagram when the flange pipe is connected to the upper chamber;

[0034] Figure 8 It is a schematic diagram of the distribution relationship of the arc-shaped pressing plates;

[0035] In the figure: 1 fixing plate, 2 elastic connecting columns, 3 vibrating screen, 4 elastic connecting pipes, 5 blanking pipe, 6 exhaust pipe, 7 collecting bin, 8 air inlet pipe, 9 connecting pipe, 10 motor, 11 gearbox, 12 eccentric vibration mechanism, 13 fan blades, 14 transmission shaft, 15 main shaft, 101 support legs, 102 mounting plate, 201 rubber column, 202 rubber shaft, 203 T-shaped shaft sleeve, 204 vertical rod, 205 locking nut, 206 metal gasket, 207 T-shaped part, 301 bottom plate, 302 adjusting sieve plate, 303 fixed sieve plate, 304 baffle, 305 feeding hopper, 306 top plate, 307 side plate, 308 third guiding vertical plate, 309 second guiding vertical plate, 310 first guiding vertical plate, 311 funnel, 312 adjusting rod, 121 rotating ring, 122 rotating disk, 123 upper connecting shaft, 124 eccentric mass block, 125 fixing pin, 126 lower connecting shaft, 127 plug pin, 128 spring, 601 filter screen, 701 partition plate, 151 first pulley, 152 belt, 153 second pulley. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying Figures 1-8 drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. If not specifically specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] Such as Figure 1 、 Figure 2 , a screening device for blasting engineering, comprising a fixed plate 1, elastic connecting columns 2, a vibrating screen 3, a blanking pipe 5, an exhaust pipe 6, a collection bin 7, an air inlet pipe 8, a connecting pipe 9, a motor 10 and fan blades 13;

[0039] A plurality of the elastic connecting columns 2 are installed on the fixed plate 1, and the elastic connecting columns 2 are connected to the bottom of the vibrating screen 3;

[0040] The output end of the vibrating screen 3 is connected to the blanking pipe 5. The blanking pipe 5 is vertically arranged, one side of which is communicated with the air inlet pipe 8, and the other side is communicated with the connecting pipe 9. The connecting pipe 9 is communicated with the exhaust pipe 6. The fan blades 13 are arranged in the air inlet pipe 8, and the motor 10 is connected to the fan blades 13; the air inlet pipe 8 and the connecting pipe 9 are both horizontally arranged, the exhaust pipe 6 is vertically arranged, and the fan blades 13 form an air flow towards the exhaust pipe 6.

[0041] The bottom of the blanking pipe 5 is communicated with the collection bin 7. The materials screened by the vibrating screen 3 fall downward into the collection bin 7 through the blanking pipe 5. The fan blades 13 are used to form a horizontal air flow towards the connecting pipe 9 to blow away the dust particles in the materials when they fall.

[0042] During specific implementation, the stones generated during blasting are first crushed by a crusher to form small pieces of stones, and then screened by the vibrating screen 3 and fall into the blanking pipe 5. The stones fall freely in the blanking pipe 5, and through the air flow formed by the fan blades 13, the dust particles in the stones are blown into the exhaust pipe 6. Compared with the prior art, the present invention can blow away the dust particles in the screened stones, effectively reduce the impurities in the stones, produce relatively pure stones, and ensure the quality of the stones.

[0043] Such as Figure 2 、 Figure 3 , the vibrating screen 3 includes a bottom plate 301, a baffle 304, a feeding hopper 305, a top plate 306, side plates 307 and a screening assembly;

[0044] The bottom of the bottom plate 301 is connected to a plurality of the elastic connection columns 2. Both sides of the bottom plate 301 are respectively and fixedly connected to the side plates 307. The tops of the two side plates 307 are fixedly connected to the top plate 306. One end of the bottom plate 301 is fixedly connected to the baffle 304, and the baffle 304 is fixedly connected to the ends of the side plates 307 and the top plate 306.

[0045] The screening assembly is located below the top plate 306 and above the bottom plate 301. The screening assembly includes an adjustable sieve plate 302 and a fixed sieve plate 303. Both sides of the fixed sieve plate 303 are respectively and fixedly connected to the two side plates 307. The adjustable sieve plate 302 fits against the bottom surface of the fixed sieve plate 303. Adjusting rods 312 are respectively arranged on both sides of the adjustable sieve plate 302, and the adjusting rods 312 pass through the side plates 307 and are locked by nuts.

[0046] The adjustable sieve plate 302 and the fixed sieve plate 303 are inclined downward in the direction away from the baffle 304. The adjustable sieve plate 302 and the fixed sieve plate 303 are both provided with sieve holes, and the sieve holes of the two are arranged staggeredly. The adjustable sieve plate 302 is used for horizontal movement to adjust the size of the overlapping part of the sieve holes.

[0047] The top of the top plate 306 is fixedly connected to the feeding hopper 305.

[0048] The two side plates 307 are vertically arranged and spaced apart. The top plate 306, the bottom plate 301 and the two side plates 307 together form a hollow part. The screening assembly is located within this hollow part, and the baffle 304 closes one end of this hollow part. The sieve holes on the adjustable sieve plate 302 and the fixed sieve plate 303 can be various hole shapes such as round holes, square holes or waist-shaped holes. By adjusting the adjusting rods 312 on both sides of the adjustable sieve plate 302, the adjustable sieve plate 302 is horizontally moved, and then locked by nuts, so as to adjust the size of the overlapping part of the staggered sieve holes to adjust the screening particle size.

[0049] Further, the screening assembly further includes a second guiding vertical plate 309. One end of the fixed sieve plate 303 away from the baffle 304 is fixedly connected to the second guiding vertical plate 309, and a plurality of the screening assemblies are provided.

[0050] One end of the bottom plate 301 away from the baffle 304 is fixedly connected to a first guiding vertical plate 310. One end of the top plate 306 away from the baffle 304 is fixedly connected to a third guiding vertical plate 308. The first guiding vertical plate 310 and the third guiding vertical plate 308 are spaced apart, and the second guiding vertical plate 309 is arranged between the two. The first, second and third guiding vertical plates are all vertically arranged.

[0051] A funnel 311 is fixedly connected between the first guiding vertical plate 310 and the second guiding vertical plate 309, between two adjacent second guiding vertical plates 309, and between the second guiding vertical plate 309 and the third guiding vertical plate 308 respectively;

[0052] The bottom of the funnel 311 is located on the air flow formed by the fan blades 13.

[0053] The side plate 307 has an L-shaped structure, and the end away from the baffle 304 faces downward. The side plate 307, the first guiding vertical plate 310, the second guiding vertical plate 309 and the third guiding vertical plate 308 together form a downward channel. In this channel, the stones move downward and are concentrated and dropped downward through the funnel 311. Since the vibrating screen 3 vibrates, an elastic connecting pipe 4 is fixedly connected to the bottom of this channel. The elastic connecting pipe 4 is fixedly connected to the top of the blanking pipe 5. The elastic connecting pipe 4 can be a corrugated pipe. When the vibrating screen 3 vibrates, the elastic connecting pipe 4 generates a certain twist, while the blanking pipe 5 remains stationary.

[0054] The function of the funnel 311 is to concentrate the stones so that the stones can be exactly blown by the air flow when they fall freely, avoiding the influence of uneven air blowing. The function of the three guiding vertical plates is to form a partitioned drop to avoid material mixing.

[0055] During specific implementation, the stones are added through the feeding hopper 305. The stones are first stacked on the fixed sieve plate 303 of the uppermost screening component, and are subjected to a primary screening by the uppermost screening component. Then, the stones that meet the particle size fall downward through the sieve holes onto the next layer of screening component. After layer-by-layer screening, finally the stones fall downward along each layer of fixed sieve plate 303 and fall into the blanking pipe 5.

[0056] In addition, both the adjusting sieve plate 302 and the fixed sieve plate 303 are inclined to facilitate the downward transportation of the stones.

[0057] Further, a plurality of partition plates 701 are fixedly connected inside the collecting bin 7. The plurality of partition plates 701 divide the inside of the collecting bin 7 into a plurality of collecting chambers. The plurality of collecting chambers correspond to the bottom discharging ends of the funnels 311 one by one, and are used to collect the materials dropped by each funnel 311 respectively.

[0058] Further, the outermost collecting chamber communicates with the bottom of the exhaust pipe 6. The exhaust pipe 6 is vertically arranged, and a filter screen 601 is arranged at the top of the exhaust pipe 6.

[0059] The diversion movement path sequentially passes through the air inlet pipe 8, the blanking pipe 5, the connecting pipe 9, and the exhaust pipe 6. The air flow moves upward in the exhaust pipe 6 and is output through the filter screen 601. The function of the filter screen 601 is to further filter dust, making the output air cleaner. Part of the dust particles in the air flow in the exhaust pipe 6 settle into the collection cavity, and part adhere to the filter screen 601 and the inner wall surface of the exhaust pipe 6.

[0060] Such as Figures 3-5 The bottom of the vibrating screen 3 is connected to the eccentric vibration mechanism 12; the eccentric vibration mechanism 12 includes a rotating ring 121, an eccentric mass block 124, an upper connecting shaft 123, a lower connecting shaft 126, a fixing pin 125, a plug pin 127, and a spring 128;

[0061] The bottom of the lower connecting shaft 126 is rotatably connected to the top of the fixing plate 1, the top of the upper connecting shaft 123 is rotatably connected to the bottom of the bottom plate 301, the top of the lower connecting shaft 126 and the bottom of the upper connecting shaft 123 are spaced apart, the top of the lower connecting shaft 126 and the bottom of the upper connecting shaft 123 are both located inside the rotating ring 121, and the inner side surface of the rotating ring 121 is spaced apart from the upper and lower connecting shafts; the upper and lower connecting shafts and the rotating ring 121 are coaxially arranged;

[0062] Two plug pins 127 are fixedly connected to the side surface of the lower connecting shaft 126, the two plug pins 127 are located in the radial direction of the lower connecting shaft 126, two fixing pins 125 are fixedly connected to the side surface of the upper connecting shaft 123, the two fixing pins 125 are located in the radial direction of the upper connecting shaft 123, the fixing pins 125 are fixedly connected to the inner side surface of the rotating ring 121, the plug pin 127 is slidably inserted into the blind hole, the blind hole is arranged on the inner side surface of the rotating ring 121, the spring 128 is arranged in the blind hole, and the end of the plug pin 127 abuts against the spring 128;

[0063] The two plug pins 127 are located on the same radial direction of the rotating ring 121, the side surface of the rotating ring 121 is fixedly connected to the eccentric mass block 124, the eccentric mass block 124 is located in the axial direction of the two plug pins 127; the lower connecting shaft 126 is connected to the motor 10. When the lower connecting shaft 126 rotates, the rotating ring 121 eccentrically rotates under the action of the eccentric mass block 124, and the upper connecting shaft 123 eccentrically rotates, thereby driving the vibrating screen 3 to vibrate.

[0064] The eccentric mass block 124 is eccentrically arranged on the rotating ring 121, and thus eccentrically rotates during the rotation of the rotating ring 121. The space between the inner side of the rotating ring 121 and the lower connecting shaft 126 provides space for the eccentric rotation of the rotating ring 121. The axis connection line formed by the two plug pins 127 is located in the diameter direction of the rotating ring 121.

[0065] When the swivel ring 121 rotates eccentrically, one of the springs 128 is compressed, and the elastic connecting column 2 is twisted, forming Figure 5 the state in . When the swivel ring 121 is stationary, under the combined action of the spring 128 and the elastic connecting column 2, the swivel ring 121 is reset. Through the eccentric rotation of the swivel ring 121, the vibrating screen 3 rotates eccentrically together, thereby forming the vibrating and screening function of the vibrating screen 3.

[0066] In addition, the top of the upper connecting shaft 123 is fixedly connected to the rotating disk 122, and the rotating disk 122 is rotatably connected to the bottom plate 301.

[0067] Furthermore, the output end of the motor 10 is fixedly connected to the main shaft 15. The main shaft 15 is connected to the horizontally arranged transmission shaft 14 through bevel gears. The transmission shaft 14 penetrates into the interior of the air inlet pipe 8 and is fixedly connected to the fan blade 13. The top of the main shaft 15 is connected to the lower connecting shaft 126 through a belt 152. The main shaft 15 is vertically arranged, and the belt 152 and the transmission shaft 14 are both horizontally arranged.

[0068] Specifically, a first pulley 151 is arranged at the top of the main shaft 15, a second pulley 153 is arranged on the lower connecting shaft 126, and the belt 152 is sleeved on the first pulley 151 and the second pulley 153 to achieve the purpose of transmission. The top of the main shaft 15 rotatably passes through the bottom plate 301. A gear box 11 is fixedly connected to the bottom of the bottom plate 301. A horizontal bevel gear and a vertical bevel gear are arranged in the gear box 11. The horizontal bevel gear is sleeved on the main shaft 15, and the vertical bevel gear is sleeved on the transmission shaft 14. A bracket is arranged inside the air inlet pipe 8, and the bracket is rotatably connected to the transmission shaft 14.

[0069] The present invention realizes the power sources of the vibrating screen 3 and the fan blade 13 through one motor, with lower cost and a more compact and effective structure.

[0070] In addition, the fixing plate 1 is fixedly connected to the mounting plate 102 through the support legs 101. The mounting plate 102 is fixed on the ground, and the motor 10 and the collection bin 7 are fixedly connected to the mounting plate 102.

[0071] Such as Figure 6 、 Figure 7 , the elastic connecting column 2 includes a rubber column 201. The top of the rubber column 201 is connected to the vibrating screen 3, and the bottom of the rubber column 201 is connected to the fixing plate 1.

[0072] The elastic connecting column 2 further includes a rubber shaft 202, a T-shaped shaft sleeve 203, a vertical rod 204, a locking nut 205, a metal gasket 206, and a T-shaped part 207;

[0073] Specifically, the top of the rubber column 201 abuts against the bottom plate 301, and the bottom of the rubber column 201 abuts against the fixing plate 1. Both the rubber column 201 and the T-shaped bushing 203 are of hollow structures. The top and bottom of the rubber column 201 are respectively inserted with T-shaped bushings 203. One of the T-shaped bushings 203 is clamped on the top surface of the bottom plate 301, and the other T-shaped bushing 203 is clamped on the bottom surface of the fixing plate 1. The rubber shaft 202 passes through the interiors of the two T-shaped bushings 203. T-shaped portions 207 are provided at both ends of the rubber shaft 202, so that both ends of the rubber shaft 202 form a "T" shaped structure. Opposite ends of the two T-shaped bushings 203 are respectively fixedly connected to vertical rods 204. The vertical rods 204 at both ends respectively pass through the T-shaped portions 207. Metal washers 206 are sleeved on the vertical rods 204, and the T-shaped portions 207 are locked by two lock nuts 205, thereby locking the rubber shaft 202.

[0074] By adjusting the lock nut 205, the tightness of the rubber shaft 202 can be adjusted. During the vibration of the vibrating screen 3, the bottom plate 301 moves relatively, so the rubber column 201 is squeezed and the rubber shaft 202 is stretched. Under the combined action of the rubber column 201 and the rubber shaft 202, elastic connection of the bottom plate 301 can be achieved, and the vibration amplitude of the vibrating screen 3 can be appropriately adjusted by adjusting the tightness of the rubber shaft 202, making the vibration of the vibrating screen 3 more stable and reliable for the screening requirements of different materials. Moreover, the detachable structure of the rubber shaft 202 can also facilitate replacement. After long-term use, rubber fatigue occurs in the rubber material. At this time, the rubber shaft 202 or the rubber column 201 can be replaced to keep the vibrating screen 3 in a reliable working condition all the time.

[0075] In addition, at least four elastic connection columns 2 are provided and distributed at the four ends of the bottom plate 301. Both the T-shaped bushing 203 and the metal washer 206 are metal components.

[0076] The embodiments described above are only used to describe the preferred mode of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, variations, modifications, and replacements made by those of ordinary skill in the art to the technical solutions of the present invention shall all fall within the protection scope determined by the claims of the present invention.

Claims

1. A screening device for blasting engineering, characterized in that It includes a fixed plate (1), elastic connecting columns (2), a vibrating screen (3), a blanking pipe (5), an exhaust pipe (6), a collecting bin (7), an air inlet pipe (8), a connecting pipe (9), a motor (10) and fan blades (13); A plurality of the elastic connecting columns (2) are installed on the fixed plate (1), and the elastic connecting columns (2) are connected to the bottom of the vibrating screen (3); The output end of the vibrating screen (3) is connected to the blanking pipe (5). The blanking pipe (5) is vertically arranged. One side of it communicates with the air inlet pipe (8), and the other side communicates with the connecting pipe (9). The connecting pipe (9) communicates with the exhaust pipe (6). The fan blades (13) are arranged in the air inlet pipe (8), and the motor (10) is connected to the fan blades (13); The bottom of the blanking pipe (5) communicates with the collecting bin (7). The materials screened by the vibrating screen (3) fall downward through the blanking pipe (5) into the collecting bin (7). The fan blades (13) are used to form a horizontal air flow towards the connecting pipe (9) to blow away the dust particles in the materials when they fall; The vibrating screen (3) includes a bottom plate (301), a baffle (304), a feeding hopper (305), a top plate (306), side plates (307) and a screening assembly; The bottom of the vibrating screen (3) is connected to an eccentric vibration mechanism (12); the eccentric vibration mechanism (12) includes a rotating ring (121), eccentric mass blocks (124), an upper connecting shaft (123), a lower connecting shaft (126), a fixing pin (125), a plug pin (127) and a spring (128); The bottom of the lower connecting shaft (126) is rotatably connected to the top of the fixed plate (1), and the top of the upper connecting shaft (123) is rotatably connected to the bottom of the bottom plate (301). The top of the lower connecting shaft (126) and the bottom of the upper connecting shaft (123) are spaced apart. The top of the lower connecting shaft (126) and the bottom of the upper connecting shaft (123) are both located inside the rotating ring (121). The inner side surface of the rotating ring (121) is spaced apart from the upper and lower connecting shafts; the upper and lower connecting shafts and the rotating ring (121) are coaxially arranged; Two plug pins (127) are fixedly connected to the side surface of the lower connecting shaft (126). The two plug pins (127) are located in the radial direction of the lower connecting shaft (126). Two fixing pins (125) are fixedly connected to the side surface of the upper connecting shaft (123). The two fixing pins (125) are located in the radial direction of the upper connecting shaft (123). The fixing pins (125) are fixedly connected to the inner side surface of the rotating ring (121). The plug pins (127) are slidably inserted into blind holes. The blind holes are arranged on the inner side surface of the rotating ring (121). Springs (128) are arranged in the blind holes, and the ends of the plug pins (127) abut against the springs (128); The two pins (127) are located on the same radial direction of the swivel (121). The side surface of the swivel (121) is fixedly connected with the eccentric mass block (124), and the eccentric mass block (124) is located in the axial direction of the two pins (127); the lower connecting shaft (126) is connected with the motor (10). When the lower connecting shaft (126) rotates, the swivel (121) rotates eccentrically, and causes the upper connecting shaft (123) to rotate eccentrically, thereby driving the vibrating screen (3) to vibrate.

2. The screening device for blasting engineering according to claim 1, wherein The bottom of the bottom plate (301) is connected with a plurality of elastic connecting columns (2). The two sides of the bottom plate (301) are respectively fixedly connected with the side plates (307). The tops of the two side plates (307) are fixedly connected with the top plate (306). One end of the bottom plate (301) is fixedly connected with the baffle (304), and the baffle (304) is fixedly connected with the ends of the side plate (307) and the top plate (306); The screening assembly is located below the top plate (306) and above the bottom plate (301); the screening assembly includes an adjustable sieve plate (302) and a fixed sieve plate (303). The two sides of the fixed sieve plate (303) are respectively fixedly connected with the two side plates (307). The adjustable sieve plate (302) fits the bottom surface of the fixed sieve plate (303). Adjusting rods (312) are respectively arranged on the two sides of the adjustable sieve plate (302), and the adjusting rods (312) pass through the side plates (307) and are locked by nuts; The adjustable sieve plate (302) and the fixed sieve plate (303) are inclined downward in the direction away from the baffle (304). Both the adjustable sieve plate (302) and the fixed sieve plate (303) are provided with sieve holes, and the sieve holes of the two are arranged staggeredly. The adjustable sieve plate (302) is used for horizontal movement to adjust the size of the overlapping part of the sieve holes; The top of the top plate (306) is fixedly connected with the feeding hopper (305).

3. The screening device for blasting engineering according to claim 2, characterized in that, The screening assembly further includes a second guiding vertical plate (309). One end of the fixed sieve plate (303) away from the baffle (304) is fixedly connected with the second guiding vertical plate (309), and multiple screening assemblies are provided; One end of the bottom plate (301) away from the baffle (304) is fixedly connected with a first guiding vertical plate (310). One end of the top plate (306) away from the baffle (304) is fixedly connected with a third guiding vertical plate (308). The first guiding vertical plate (310) and the third guiding vertical plate (308) are spaced apart, and the second guiding vertical plate (309) is arranged between them. The first, second, and third guiding vertical plates are all vertically arranged; A funnel (311) is fixedly connected between the first guiding vertical plate (310) and the second guiding vertical plate (309), between adjacent two second guiding vertical plates (309), and between the second guiding vertical plate (309) and the third guiding vertical plate (308); The bottom of the funnel (311) is located on the air flow formed by the fan blades (13).

4. The screening device for blasting engineering according to claim 3, characterized in that, A plurality of partition plates (701) are fixedly connected inside the collection bin (7), and the plurality of partition plates (701) form a plurality of collection chambers inside the collection bin (7). The plurality of collection chambers respectively correspond to the bottom discharging ends of the funnels (311) and are used to collect the materials dropped by each of the funnels (311).

5. The screening device for blasting engineering according to claim 4, wherein, The outermost collection chamber communicates with the bottom of the exhaust duct (6). The exhaust duct (6) is vertically arranged, and a filter screen (601) is arranged at the top of the exhaust duct (6).

6. The screening device for blasting engineering according to claim 1, characterized in that, The output end of the motor (10) is fixedly connected to the main shaft (15). The main shaft (15) is connected to the horizontally arranged transmission shaft (14) through bevel gears. The transmission shaft (14) is fixedly connected to the fan blades (13). The top of the main shaft (15) is connected to the lower connecting shaft (126) through a belt (152). The main shaft (15) is vertically arranged, and the belt (152) and the transmission shaft (14) are both horizontally arranged.

7. The screening device for blasting engineering according to claim 1, characterized in that, The elastic connecting column (2) includes a rubber column (201). The top of the rubber column (201) is connected to the vibrating screen (3), and the bottom of the rubber column (201) is connected to the fixing plate (1).

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