Vacuum suction screening machine for screening highway engineering test fine aggregate

Abstract

The utility model discloses a vacuum suction screening machine for screening highway engineering test fine aggregate, which comprises a vacuum box, a screening platform, a base and a plurality of screening boxes, the screening boxes are sequentially communicated from top to bottom, the screening box at the lowest layer is connected with a bottom screening box, the lower end of the bottom screening box is connected to the vacuum box, and the bottom screening box is connected to the base. The vacuum box is fixed to the screening platform, the bottom of the screening platform is connected to the base through a damping spring, a heavy hammer and a motor are arranged in the base, an output shaft of the motor is connected with the heavy hammer, the screening machine can achieve continuous screening, meanwhile, fine particles can be thoroughly screened, and a large amount of dust can be prevented from being generated.

Description

Technical Field

[0001] The utility model belongs to the technical field of highway aggregate test screening, and relates to a vacuum suction screening machine used for screening fine aggregate in highway engineering tests. Background Art

[0002] Highway aggregate tests often require aggregate screening to meet test grading requirements. Ordinary screening devices are mechanical equipment used to screen various raw materials and primary products through screens and divide them into several grades according to the particle size of the materials by rotating, vibrating, reciprocating, shaking and other actions. During use, it is often necessary to take out the screening box for feeding and discharging operations, and the fine powder generated during the screening process is difficult to screen thoroughly, and it often clogs the screen. Manual operation is difficult, the discharging speed is slow, and layered discharging cannot be achieved, wasting manpower and material resources.

[0003] For example, the publication number CN 220258718 U discloses a multi-stage screening device for highway maintenance gravel, the structure of which includes a combination of multiple horizontal rectangular frames and multiple vertical support rods, and each rectangular frame forms a first screening area, a second screening area and a collection area for screening materials in sequence from top to bottom with the support rods, the screening area includes a screening plate rotatably set on the rectangular frame, baffles are fixedly set on both ends of the screening plate in the longitudinal direction, the baffles are provided with a slide groove in the direction parallel to the screening plate, a slide shaft is slidably set on the slide groove, a support plate is fixedly set on the outer wall of the rectangular frame, a motor 2 is fixedly set on the support plate, and a transmission mechanism for controlling the sliding of the slide shaft is provided between the motor 2 and the slide shaft. The problem that fine powder particles are difficult to screen and the screening is not thorough, which is not conducive to human health, has not been solved.

[0004] The problem with the above technology is that the screening cannot be carried out continuously, the fine particles are not screened thoroughly, and a large amount of dust is present during the screening, which is not conducive to human health. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a vacuum suction screening machine for fine aggregate screening in highway engineering tests, which can realize continuous screening, and at the same time can achieve thorough screening of fine particles and can avoid generating a large amount of dust.

[0006] To achieve the above-mentioned purpose, the utility model discloses a vacuum suction screening machine for fine aggregate screening in highway engineering tests, comprising a vacuum box, a screening platform, a base and a plurality of screening boxes, the screening boxes being sequentially connected from top to bottom, the screening box on the lowest layer being connected to a bottom screening box, the lower end of the bottom screening box being connected to the vacuum box, the vacuum box being fixed on the screening platform, the bottom of the screening platform being connected to the base through a shock-absorbing spring, a weight and a motor being arranged in the base, wherein an output shaft of the motor is connected to the weight.

[0007] A dust cover is arranged on the top of the uppermost screening box, and a vent hole is arranged on the dust cover.

[0008] A feed port is arranged at the upper part of the uppermost screening box, a sealing cover is arranged at the feed port, a screen is arranged in the screening box, and a discharge port is arranged on the side of the screening box at the horizontal position where the screen is located.

[0009] From top to bottom, the mesh openings of the screens in each screening box gradually decrease.

[0010] It also includes a discharge pipe and a material collection box, and the discharge port is connected with the material collection box through the discharge pipe.

[0011] It also includes a fixing rod, and a fixing ring is arranged on the side of each screening box. The fixing ring is fixed on the fixing rod through a limiting ring, and the fixing rod is vertically fixed on the screening platform.

[0012] A plurality of square holes are provided in the middle of the baffle, wherein one square hole corresponds to a discharge port on the screening box, the baffle is fixed to the discharge port of the screening box by means of a buckle on the outer wall of the screening box, a latch hole and a baffle hole are provided at the bottom of the baffle, a pneumatic rod hole is provided on the pneumatic rod, the pneumatic rod passes through the baffle hole and the latch hole, wherein the latch hole is aligned with the pneumatic rod hole, the latch passes through the latch hole and the pneumatic rod hole, so that the baffle is connected to the pneumatic rod.

[0013] A vacuum pump is arranged in the vacuum box, and an exhaust pipe is inserted into the vacuum box and communicated with the vacuum pump. The vacuum box is fixedly sealed with the bottom screening box.

[0014] The lower part of the bottom screening box is the screen bottom, a vacuum tube is arranged in the center of the screen bottom, the upper part of the vacuum tube is a conical air-permeable net, the vacuum tube passes through the screen bottom and is inserted into the vacuum box and then connected with the vacuum pump.

[0015] A piston rod is hinged on one side of the bottom of the screening platform, and a cam is arranged below the piston rod. The cam is fixed on the output shaft of the cam motor. The other side of the bottom of the screening platform is connected to a limit rod through a bolt hole and a fixing plate. The cam is rotated by the cam motor to drive the piston rod to reciprocate up and down, so that the screening box is tilted.

[0016] The utility model has the following beneficial effects:

[0017] In the specific operation of the vacuum suction screening machine for fine aggregate screening in highway engineering tests described in the utility model, each screening box is sequentially connected from top to bottom, and the aggregate is discharged after being screened by each screening box from top to bottom. At the same time, the lower end of the bottom screening box is connected to the vacuum box, and the vacuum box is fixed on the screening platform. The vacuum pump in the vacuum box provides suction force to accelerate the screening of the aggregate, achieve thorough screening of fine particles, and avoid generating a large amount of dust. In addition, a heavy hammer and an electric motor are provided to improve the screening effect and efficiency through the dual effects of vibration and suction. It is extremely practical and occupies a small area. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the connection between the baffle 6 and the pneumatic rod;

[0020] Figure 3 It is a structural schematic diagram of the screening box 4;

[0021] Figure 4 It is a schematic structural diagram of the vacuum box 13;

[0022] Figure 5 It is a structural diagram of the bottom screening box 12;

[0023] Figure 6 It is a structural diagram of the bottom of the bottom screening box 12;

[0024] Figure 7 Schematic diagram of the cam mechanism.

[0025] Among them, 1 is a limit ring, 2 is a sealing cover, 3 is a feed port, 4 is a screening box, 41 is a connecting rod, 42 is a fixing ring, 43 is a screen, 44 is a clamping ring, 45 is a buckle, 46 is a discharge port, 47 is a sealing ring, 5 is a fixing rod, 6 is a baffle, 61 is a clamping pin hole, 62 is a baffle hole, 63 is a clamping pin, 64 is a pneumatic rod hole, 7 is a discharge pipe, 8 is a pneumatic rod, 9 is a screening platform, and 91 is a bolt hole , 92 is a fixing plate, 93 is a limiting rod, 94 is a cam, 95 is a cam motor, 96 is a piston rod, 10 is a collecting box, 11 is a base, 12 is a bottom screening box, 121 is a breathable net, 122 is a vacuum tube, 123 is a screen bottom, 13 is a vacuum box, 131 is an exhaust pipe, 132 is a vacuum pump, 14 is an electric motor, 15 is a shock-absorbing spring, 16 is a heavy hammer, 17 is an air hole, and 18 is a dust cover. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only an embodiment of a part of the utility model, not all embodiments, and is not intended to limit the scope of the disclosure of the utility model. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the utility model.

[0027] The accompanying drawings show schematic diagrams of structures according to the disclosed embodiments of the utility model. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0028] refer to Figures 1 to 7 The vacuum suction screening machine for fine aggregate screening in highway engineering tests described in the utility model includes a plurality of screening boxes 4, each screening box 4 is sequentially connected from top to bottom, the screening box 4 is a cylindrical structure, the bottom screening box 4 is connected to the bottom screening box 12 through a clamp ring 44 and a sealing ring 47, the lower end of the bottom screening box 12 is connected to a vacuum box 13 through a clamp ring 44 and a sealing ring 47, the vacuum box 13 is fixed on the screening platform 9, the bottom of the screening platform 9 is connected to a base 11 through a shock-absorbing spring 15, a weight 16 and a motor 14 are arranged in the base 11, wherein the output shaft of the motor 14 is connected to the weight 16.

[0029] In this embodiment, a dust cover 18 is provided on the top of the uppermost screening box 4 , and a vent hole 17 is provided on the dust cover 18 .

[0030] In this embodiment, a feed port 3 is provided on the upper part of the topmost screening box 4, a sealing cover 2 is provided at the feed port 3, a screen 43 is provided in the screening box 4, wherein the sieve holes of the screen 43 in each screening box 4 gradually decrease from top to bottom, and a discharge port 46 is provided on the side of the horizontal position of the screen 43 on each screening box 4, the discharge port 46 is connected with the aggregate box 10 through the discharge pipe 7, and a fixing ring 42 is provided on the side of the screening box 4, the fixing ring 42 is fixed to the fixing rod 5 through the limiting ring 1, and the fixing rod 5 is upright and fixed to the screening platform 9.

[0031] In this embodiment, reference Figure 2The baffle 6 is a rectangular rubber plate, and a plurality of equally spaced square holes are provided in the middle of the baffle 6. The size of the square holes is consistent with the discharge port 46. One square hole corresponds to one discharge port 46 on the screening box 4. The baffle 6 is fixed to the discharge port 46 of the screening box 4 through the buckle 45 on the outer wall of the screening box 4. The baffle 6 can only move up and down. A clip hole 61 and a baffle hole 62 are provided at the bottom of the baffle 6. A pneumatic rod hole 64 is provided on the pneumatic rod 8. The pneumatic rod 8 passes through the baffle hole 62 and the clip hole 61. The clip hole 61 is aligned with the pneumatic rod hole 64. The clip 63 passes through the clip hole 61 and the pneumatic rod hole 64, so that the baffle 6 is connected to the pneumatic rod 8.

[0032] like Figure 3 As shown, in this embodiment, the screening box 4 includes a box body, a screen 43, a buckle 45, a discharge port 46, a connecting rod 41, a fixing ring 42, a clamping ring 44 and a sealing ring 47, wherein adjacent screening boxes 4 are fixedly sealed and connected by the clamping ring 44 and the sealing ring 47, the fixing ring 42 is fixed to the outer wall of the box body by the connecting rod 41, the buckle 45 is fixed to the outer wall of the box body, the baffle 6 can be vertically inserted into the buckle 45, the buckle 45 is provided on the outer wall of the box body, the discharge port 46 is provided on the outer wall of the box body, and the discharge port 46 passes through the buckle 45, the screen 43 is fixed in the box body, and the box body is a hollow structure.

[0033] like Figure 4 As shown, in this embodiment, a vacuum pump 132 is provided in the vacuum box 13, and the exhaust pipe 131 is inserted into the vacuum box 13 and communicated with the vacuum pump 132, and the vacuum box 13 and the bottom screening box 4 are fixed and sealed by a clamping ring 44 and a sealing ring 47.

[0034] like Figure 5 and Figure 6 As shown, in this embodiment, the lower part of the bottom screening box 12 is the screen bottom 123, and a vacuum tube 122 is arranged at the center of the screen bottom 123. The upper part of the vacuum tube 122 is a conical air-permeable net 121, which can only pass gas. The vacuum tube 122 passes through the screen bottom 123 and is inserted into the vacuum box 13 to be connected with the vacuum pump 132. The air-permeable net 121 can prevent the bottom layer of fine powder from clogging the vacuum pump 132.

[0035] like Figure 7 As shown, in this embodiment, a piston rod 96 is hinged on one side of the bottom of the screening platform 9, and a cam 94 is arranged below the piston rod 96. The cam 94 is fixed on the output shaft of the cam motor 95. The other side of the bottom of the screening platform 9 is connected to the limiting rod 93 through the bolt hole 91 and the fixing plate 9. The cam 94 is rotated by the cam motor 95 to drive the piston rod 96 to reciprocate up and down, so that the screening box 4 is tilted, and then the material is dumped into the collecting box 10.

[0036] The specific working process of the utility model is:

[0037] According to production needs, different levels of screening boxes 4 are installed in the screening machine. The material enters the screening machine from the feed port 3. Under the action of mechanical vibration and vacuum suction, the material is screened layer by layer. The material with the smallest particle size falls on the screen bottom 123. The baffle 6 is raised or lowered by the pneumatic rod 8 to open or close the discharge port 46, thereby discharging the material into the collection box 10.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.

Claims

1. A vacuum suction screening machine for fine aggregate screening in highway engineering tests, characterized in that: The invention comprises a vacuum box (13), a screening platform (9), a base (11) and a plurality of screening boxes (4), wherein the screening boxes (4) are sequentially connected from top to bottom, the screening box (4) at the bottom is connected to a bottom screening box (12), the lower end of the bottom screening box (12) is connected to the vacuum box (13), the vacuum box (13) is fixed to the screening platform (9), the bottom of the screening platform (9) is connected to the base (11) through a shock absorbing spring (15), a weight (16) and an electric motor (14) are arranged in the base (11), wherein the output shaft of the electric motor (14) is connected to the weight (16).

2. The vacuum suction screening machine for fine aggregate screening of highway engineering tests according to claim 1 is characterized in that: A dust cover (18) is provided on the top of the uppermost screening box (4), and a vent hole (17) is provided on the dust cover (18).

3. The vacuum suction screening machine for fine aggregate screening of highway engineering tests according to claim 1, characterized in that: A feed port (3) is provided at the upper part of the uppermost screening box (4), a sealing cover (2) is provided at the feed port (3), a screen (43) is provided inside the screening box (4), and a discharge port (46) is provided on the side of the screening box (4) at a horizontal position where the screen (43) is located.

4. The vacuum suction screening machine for fine aggregate screening of highway engineering tests according to claim 3 is characterized in that: From top to bottom, the mesh size of the screen (43) in each screening box (4) gradually decreases.

5. The vacuum suction screening machine for fine aggregate screening of highway engineering tests according to claim 3, characterized in that: It also includes a discharge pipe (7) and a material collection box (10), and the discharge port (46) is connected to the material collection box (10) through the discharge pipe (7).

6. The vacuum suction screening machine for fine aggregate screening of highway engineering tests according to claim 1, characterized in that: It also includes a fixing rod (5), and a fixing ring (42) is provided on the side of each screening box (4). The fixing ring (42) is fixed to the fixing rod (5) through a limiting ring (1), and the fixing rod (5) is vertically fixed to the screening platform (9).

7. The vacuum suction screening machine for fine aggregate screening of highway engineering tests according to claim 1, characterized in that: A vacuum pump (132) is arranged in the vacuum box (13); an exhaust pipe (131) is inserted into the vacuum box (13) and communicates with the vacuum pump (132); the vacuum box (13) and the bottom screening box (12) are fixedly sealed.

8. The vacuum suction screening machine for fine aggregate screening of highway engineering tests according to claim 6, characterized in that: The lower part of the bottom screening box (12) is a screen bottom (123), a vacuum tube (122) is arranged at the center of the screen bottom (123), the upper part of the vacuum tube (122) is a conical air permeable net (121), and the vacuum tube (122) passes through the screen bottom (123) and is inserted into the vacuum box (13) and then communicated with a vacuum pump (132).

9. The vacuum suction screening machine for fine aggregate screening of highway engineering tests according to claim 1, characterized in that: A piston rod (96) is hingedly connected to one side of the bottom of the screening platform (9), a cam (94) is arranged below the piston rod (96), and the cam (94) is fixed to the output shaft of the cam motor (95). The other side of the bottom of the screening platform (9) is connected to a limit rod (93) through a bolt hole (91) and a fixing plate (92). The cam (94) is rotated by the cam motor (95) to drive the piston rod (96) to reciprocate up and down, so that the screening box (4) is tilted.

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