Discharge anti-segregation device for cement stabilized macadam base mixture

Abstract

This utility model discloses a discharge anti-segregation device for cement-stabilized crushed stone base course mixture, including a hopper located below the right end of a conveyor belt and a baffle plate on the hopper. The hopper has an opening at the top and a discharge port at the bottom. The baffle plate is vertically mounted on the hopper, and its position is adjusted according to the conveyor belt speed V. C The tilt angle θ is set at a distance S from the discharge position of the conveyor belt. m1 ~S m2 The baffle is positioned so that coarse and fine aggregates can simultaneously impact the baffle and fall, preventing segregation. This invention determines the optimal installation position range of the baffle based on the conveyor belt's speed and inclination angle. By installing the baffle within this optimal range, segregation of coarse and fine aggregates in the mixture can be prevented to the greatest extent possible.

Description

Technical Field

[0001] This utility model belongs to the field of cement-stabilized crushed stone mixing technology, and particularly relates to a discharge anti-segregation device for cement-stabilized crushed stone base course mixture. Background Technology

[0002] When the cement-stabilized base course mixture is discharged from the mixing plant, it needs to be lifted and transported to the hopper by a conveyor belt. However, since the cement-stabilized base course mixture is made up of aggregates of different particle sizes, when the coarse and fine aggregates are transported to the hopper at the end of the conveyor belt, the coarse aggregates continue to be transported forward due to air resistance, while the fine aggregates fall down quickly, causing segregation of the mixture after leaving the conveyor belt.

[0003] Chinese utility model patent (publication number: CN104894947B) discloses an anti-segregation device for a water-stabilized mixing plant. This device addresses the problem in existing technologies where, during the oblique conveyor belt transport of aggregate to the finished product bin, some large stones deviate from the aggregate's trajectory and land slightly further away in the bin than in the main mix. Furthermore, during the accumulation of aggregate in the bin, large stones at the edges tend to slide down to the bottom edge of the bin under gravity, leading to aggregate concentration and segregation during paving. The anti-segregation device for the water-stabilized mixing plant is located between the discharge end of the aggregate conveyor belt and the discharge bin. It includes a vertically positioned anti-segregation baffle blocking the outside of the discharge end of the conveyor belt and an anti-stone slippage cover inside the discharge bin, with the upper edge of the cover hinged to the lower edge of the anti-segregation baffle.

[0004] While the anti-segregation baffles in the above-mentioned technical solutions can prevent segregation by causing the mixture to fall together, in practical applications, the installation position of the baffles can also affect the segregation of the mixture. If the baffles are too close, regardless of whether the conveying speed is too fast or slow, the mixture will accumulate at the front end of the hopper. In the hopper, coarse aggregates will also slide to the side away from the conveyor belt due to gravity, causing segregation. If the baffles are too far away, coarse and fine aggregates will already be segregated in the air.

[0005] Furthermore, due to the different inclination angles of the conveyor belts at different mixing plants, and the fact that the mixing plants control the conveyor belt speed based on different raw materials, output, and external environmental influences, the distance and height of the mixture exiting the conveyor belt will change under different conveyor belt angles and conveyor speeds, which cannot be flexibly adjusted in the existing technology. Utility Model Content

[0006] The purpose of this utility model is to provide a discharge anti-segregation device for cement-stabilized crushed stone base course mixture, so as to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A discharge anti-segregation device for cement-stabilized crushed stone base course mixture includes a hopper located below the right end of a conveyor belt and a baffle plate mounted on the hopper. The hopper has an opening at the top and a discharge port at the bottom. The baffle plate is vertically mounted on the hopper and its position is adjusted according to the conveyor belt speed V. C The tilt angle θ is set at a distance S from the discharge position of the conveyor belt. m1 ~S m2 The position of the baffle allows coarse and fine aggregates to impact the baffle simultaneously before falling, preventing segregation of coarse and fine aggregates.

[0009] The S m1 The calculation formula is:

[0010] S m1 =0.6H / tanθ;

[0011] The S m2 The calculation formula is:

[0012] S m2 =0.75H / tanθ;

[0013] S m1 and S m2 In the calculation formula, H is the height of the highest point of the mixture after it is thrown from the discharge position of the conveyor belt, and the calculation formula is:

[0014]

[0015] Furthermore, it also includes an adjustment mechanism; the adjustment mechanism includes a support platform, bearing seats, a lead screw, a slide table, an adjustment motor, a fixed seat, a guide rod, and a guide block. The support platform is located on the front and rear sides of the hopper; the bearing seats are vertically located on the top surface of the front support platform, with two seats spaced apart on the left and right; the lead screw is arranged in the left-right direction, with its left and right sides located within the two bearing seats; the adjustment motor is fixedly located on the right side of the support platform, with its output shaft facing the left and connected to the lead screw; the slide table is sleeved on the lead screw; the fixed seat is vertically located on the top surface of the rear support platform, with two seats spaced apart on the left and right; the guide rod is arranged in the left-right direction, with its left and right sides fixedly located within the two fixed seats; the guide block is slidably sleeved on the guide rod; the front and rear sides of the baffle are fixedly connected to the slide table and the guide block, respectively.

[0016] Furthermore, it also includes an installation mechanism, which comprises an installation frame, a first connecting plate, and a second connecting plate; the top surface of the installation frame is open, the bottom end extends downward into the interior of the hopper, and the upper end extends upward out of the top surface of the hopper; the first connecting plate is arranged in the front-rear direction, its front bottom surface is fixedly connected to the top surface of the slide table, and its rear end is fixedly connected to the front side of the installation frame; the second connecting plate is arranged in the front-rear direction, its rear top surface is fixedly connected to the top surface of the guide block, and its front end is fixedly connected to the rear side of the installation frame; the baffle is located inside the installation frame.

[0017] Furthermore, the mounting frame has an inner mounting groove; the side of the baffle is inserted into the mounting groove and connected to the mounting frame.

[0018] Furthermore, it also includes a support mechanism; the support mechanism includes a support plate, a first hinge seat, a slider, a second hinge seat, and a support rod; the support plate is arranged along the front-to-back direction, and its two ends are respectively fixedly connected to the front and rear sides of the mounting frame, and a vertical sliding groove is provided on the right side of the support plate; the slider is slidably disposed in the sliding groove; the first hinge seat is fixedly disposed on the right side of the slider; the second hinge seat is fixedly disposed on the right side wall of the hopper; the upper and lower ends of the support rod are respectively hinged to the first hinge seat and the second hinge seat.

[0019] Furthermore, it also includes a stirring mechanism; the stirring mechanism is provided with two units spaced apart front and back, including a rotating shaft, a spiral stirring blade, and a stirring motor; the rotating shaft is arranged in the hopper along the left and right direction, and its two ends are rotatably connected to the side wall of the hopper; the spiral stirring blade is arranged on the rotating shaft; the stirring motor is arranged on the right side wall of the hopper and connected to the rotating shaft.

[0020] The principle of this utility model is as follows:

[0021] The air resistance coefficient is related to the characteristic area (frontal area) of the object, its smoothness, and its overall shape. Coarse aggregate has a large mass and a small frontal area, so air resistance has a weaker impact and the projectile distance is longer. Fine aggregate has a small mass and a large frontal area, so air resistance has a stronger impact and the object falls faster. Theoretically, placing the baffle within the furthest range of the fine aggregate can ensure that both coarse and fine aggregates land in the same place. Since the air resistance coefficient is difficult to measure in actual construction, based on practical experience, the optimal impact position range for the mixture is 0.60H to 0.75H. Considering the trajectory of the mixture after leaving the conveyor belt as projectile motion, the formula for calculating H is:

[0022]

[0023] Then, based on trigonometric functions:

[0024]

[0025] get:

[0026] S=H / tanθ

[0027] The optimal range for impacting the mixture is:

[0028] S m1 =0.6×H / tanθ, S m2 =0.75×H / tanθ;

[0029] Substituting into the formula for calculating H, the optimal range S for the impact position of the mixture can be obtained. m1 ~S m2 Adjust the position of the baffle to S m1 ~S m2 This can prevent segregation of the mixture to the greatest extent possible.

[0030] The advantages of this utility model compared to the prior art are as follows:

[0031] 1. This utility model determines the optimal installation position range of the baffle based on the conveyor belt's conveying speed and tilt angle. By installing the baffle at the optimal installation position, the segregation of coarse and fine aggregates in the mixture can be prevented to the greatest extent.

[0032] 2. This utility model, by setting an adjustment mechanism, uses an adjustment motor to drive the lead screw to rotate, and in conjunction with the installation mechanism, enables the baffle to move, thereby facilitating the adjustment of the baffle's position according to actual conditions. It is highly flexible and saves time and effort.

[0033] 3. This utility model provides support for the baffle by setting a support mechanism, which ensures the stability of the baffle during use, improves its service life, and allows for adaptive adjustment when the baffle moves.

[0034] 4. This utility model, by setting up a stirring mechanism, stirs the mixture entering the hopper, which can make the coarse and fine aggregates mix evenly, prevent the coarse and fine aggregates from segregating in the hopper, and ensure product quality. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of this utility model;

[0036] Figure 2 This is a diagram showing the motion trajectory of the mixture after it is thrown out of the conveyor belt outlet position.

[0037] Figure 3 This is a schematic diagram of the connection structure between the adjustment mechanism and the installation mechanism of this utility model;

[0038] Figure 4 This is a schematic diagram of the connection structure between the adjustment mechanism and the installation mechanism of this utility model from another perspective;

[0039] Figure 5 This is a schematic diagram of the support mechanism of this utility model;

[0040] Figure 6 This is a schematic diagram of the connection mechanism between the mixing mechanism and the feeding hopper of this utility model;

[0041] In the attached diagram, 1 - conveyor belt;

[0042] 2-Feeding hopper;

[0043] 3-Baffle;

[0044] 4-Adjusting mechanism; 41-Support platform; 42-Bearing seat; 43-Lead screw; 44-Slide table; 45-Adjusting motor; 46-Fixed seat; 47-Guide rod; 48-Guide block;

[0045] 5-Installation mechanism; 51-Installation frame; 52-First connecting plate; 53-Second connecting plate; 54-Installation slot;

[0046] 6-Support mechanism; 61-Support plate; 611-Slide groove; 62-First hinge seat; 63-Slider; 64-Second hinge seat; 65-Support rod;

[0047] 7-Agitator mechanism; 71-Rotating shaft; 72-Helical agitator blades; 73-Agitator motor;

[0048] 8-Camera. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of this utility model, and these aspects can be achieved even without these specific details.

[0050] like Figure 1-6 As shown, a discharge anti-segregation device for cement-stabilized crushed stone base course mixture includes a hopper 2 located below the right end of a conveyor belt 1 and a baffle 3 mounted on the hopper 2. The hopper 2 has an opening at the top and a discharge port at the bottom. The baffle 3 is vertically mounted on the hopper 2, and its position is adjusted according to the conveying speed V of the conveyor belt 1. C The tilt angle θ is set at a distance S from the discharge position of conveyor belt 1. m1 ~S m2 The position of the baffle plate ensures that coarse and fine aggregates can simultaneously impact the baffle plate 3 before falling, preventing segregation of coarse and fine aggregates.

[0051] like Figure 2 As shown, the Sm1 The calculation formula is:

[0052] S m1 =0.6H / tanθ;

[0053] The S m2 The calculation formula is:

[0054] S m2 =0.75H / tanθ;

[0055] S m1 and S m2 In the calculation formula, H is the height of the highest point of the mixture after it is thrown from the discharge position of conveyor belt 1, and the calculation formula is:

[0056]

[0057] like Figure 3-4 As shown, it also includes an adjustment mechanism 4; the adjustment mechanism 4 includes a support platform 41, bearing seats 42, a lead screw 43, a slide table 44, an adjustment motor 45, a fixed seat 46, a guide rod 47, and a guide block 48. The support platform 41 is located on the front and rear sides of the hopper 2; the bearing seats 42 are vertically arranged on the top surface of the front support platform 41, and two are spaced apart on the left and right; the lead screw 43 is arranged in the left and right direction, and its left and right sides are located in the two bearing seats 42; the adjustment motor 45 is fixedly arranged on the right side of the support platform 41, its output shaft faces to the left, and is connected to the lead screw 43; the slide table 44 is sleeved on the lead screw 43; the fixed seat 46 is vertically arranged on the top surface of the rear support platform 41, and two are spaced apart on the left and right; the guide rod 47 is arranged in the left and right direction, and its left and right sides are fixedly arranged in the two fixed seats 46; the guide block 48 is slidably sleeved on the guide rod 47; the front and rear sides of the baffle 3 are fixedly connected to the slide table 44 and the guide block 48, respectively. Adjusting the output shaft of motor 45 to rotate drives lead screw 43 to rotate on bearing seat 42, causing slider 63 to move left and right on lead screw 43, thereby driving baffle 3 to move left and right, realizing the adjustment of the position of baffle 3. At the same time, guide block 48 moves on guide rod 47 to ensure the stability of baffle 3 movement.

[0058] like Figure 3-4As shown, it also includes an installation mechanism 5, which includes an installation frame 51, a first connecting plate 52, and a second connecting plate 53. The installation frame 51 has an open top surface, extends downwards into the hopper 2 at its bottom end, and extends upwards out of the top surface of the hopper 2 at its top end. The first connecting plate 52 is arranged along the front-rear direction, with its front bottom surface fixedly connected to the top surface of the slide table 44 and its rear end fixedly connected to the front side of the installation frame 51. The second connecting plate 53 is arranged along the front-rear direction, with its rear top surface fixedly connected to the top surface of the guide block 48 and its front end fixedly connected to the rear side of the installation frame 51. The baffle 3 is located inside the installation frame 51. When the adjustment mechanism 4 is activated, the installation frame 51 moves, causing the baffle 3 to move.

[0059] like Figure 3-4 As shown, the mounting frame 51 has a mounting groove 54 on its inner side; the baffle 3 is inserted into the mounting groove 54 and connected to the mounting frame 51. The baffle 3 is connected to the mounting frame 51 through the mounting groove 54, which can ensure the stability of the baffle 3 during operation, and at the same time facilitate the installation, disassembly and replacement of the baffle 3.

[0060] like Figure 5 As shown, it also includes a support mechanism 6; the support mechanism 6 includes a support plate 61, a first hinge seat 62, a slider 63, a second hinge seat 64, and a support rod 65; the support plate 61 is arranged along the front-to-back direction, and its two ends are fixedly connected to the front and rear sides of the mounting frame 51 respectively. A vertical groove 611 is provided on the right side of the support plate 61; the slider 63 is slidably disposed in the groove 611; the first hinge seat 62 is fixedly disposed on the right side of the slider 63; the second hinge seat 64 is fixedly disposed on the right side wall of the hopper 2; the upper and lower ends of the support rod 65 are hinged to the first hinge seat 62 and the second hinge seat 64 respectively. During operation, the support plate 61 and the support rod 65 support the baffle 3. At the same time, when the baffle 3 moves, the support rod 65 can adaptively adjust through the hinge seat and the groove 611, and continue to support the baffle 3 after the position of the baffle 3 is adjusted.

[0061] like Figure 6 As shown, it also includes a stirring mechanism 7; two stirring mechanisms 7 are arranged at intervals, including a rotating shaft 71, a spiral stirring blade 72, and a stirring motor 73; the rotating shaft 71 is arranged in the lateral direction inside the hopper 2, and its two ends are rotatably connected to the side wall of the hopper 2; the spiral stirring blade 72 is arranged on the rotating shaft 71; the stirring motor 73 is arranged on the right side wall of the hopper 2 and connected to the rotating shaft 71. The stirring motor 73 drives the rotating shaft 71 and the spiral stirring blade 72 to rotate, so that the spiral stirring blade 72 stirs the material in the hopper 2, further reducing segregation.

[0062] like Figure 1 , 3As shown in Figure 4, in a further embodiment, a camera 8 is provided on the left side of the top surface of the support platform 41 located on the front side. The camera 8 is connected to the control room and is used to remotely monitor whether the mixture produces segregation. When segregation occurs, the position of the baffle 3 can be adjusted by controlling the adjusting motor 45.

[0063] The working principle of this utility model is as follows:

[0064] First, the installation position range S of the baffle 3 is calculated using the angle between the conveyor belt 1 and the ground, and the conveying speed of the conveyor belt 1. m1 and S m2 The adjusting motor 45 of the adjusting mechanism 4 is started, which drives the lead screw 43 to rotate, causing the slide table 44 to move on the lead screw 43, thereby driving the mounting frame 51 and the baffle 3 to move, so that the baffle 3 moves to S. m1 and S m2 The position between the two materials ensures that the coarse and fine aggregates of the mixture collide with the baffle 3 and fall into the hopper 2. At the same time, the stirring motor 73 drives the rotating shaft 71 and the spiral stirring blade 72 to rotate, so that the spiral stirring blade 72 stirs the material in the hopper 2, further reducing segregation.

[0065] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A discharge anti-segregation device for cement-stabilized crushed stone base course mixture, comprising a discharge hopper disposed below the right end of a conveyor belt and a baffle disposed on the discharge hopper, characterized in that: The hopper has an opening at the top and a discharge port at the bottom; the baffle is vertically mounted on the hopper, and the baffle adjusts according to the conveyor belt speed V. C The tilt angle θ is set at a distance S from the discharge position of the conveyor belt. m1 ~S m2 The position of the baffle allows coarse and fine aggregates to impact the baffle simultaneously before falling, preventing segregation of coarse and fine aggregates.

2. The cement stabilized macadam base mixture discharging anti-segregation device according to claim 1, characterized in that: The S m1 The calculation formula is: S m1 = 0.6H; The S m2 The calculation formula is: S m2 = 0.75H; S m1 and S m2 In the calculation formula, H is the height from the highest point of the mixture after being thrown out of the discharge position of the conveying belt to the discharge position, and the calculation formula is:

3. The cement stabilized macadam base mixture discharging anti-segregation device according to claim 1, characterized in that: It also includes an adjustment mechanism; the adjustment mechanism includes a support platform, bearing seats, a lead screw, a slide table, an adjustment motor, a fixed seat, a guide rod, and a guide block. The support platform is located on the front and rear sides of the hopper; the bearing seats are vertically located on the top surface of the front support platform, with two seats spaced apart on the left and right; the lead screw is arranged in the left-right direction, with its left and right sides located within the two bearing seats; the adjustment motor is fixedly located on the right side of the support platform, with its output shaft facing the left and connected to the lead screw; the slide table is sleeved on the lead screw; the fixed seat is vertically located on the top surface of the rear support platform, with two seats spaced apart on the left and right; the guide rod is arranged in the left-right direction, with its left and right sides fixedly located within the two fixed seats; the guide block is slidably sleeved on the guide rod; the front and rear sides of the baffle are fixedly connected to the slide table and the guide block, respectively.

4. The cement stabilized macadam base mixture discharging anti-segregation device according to claim 3, characterized in that: It also includes an installation mechanism, which comprises an installation frame, a first connecting plate, and a second connecting plate; the installation frame has an opening on its top surface, extends downward into the interior of the hopper at its bottom end, and extends upward out of the top surface of the hopper at its top end; the first connecting plate is arranged along the front-rear direction, with its front bottom surface fixedly connected to the top surface of the slide table and its rear end fixedly connected to the front side of the installation frame; the second connecting plate is arranged along the front-rear direction, with its rear top surface fixedly connected to the top surface of the guide block and its front end fixedly connected to the rear side of the installation frame; the baffle is located inside the installation frame.

5. The cement stabilized macadam base mixture discharging anti-segregation device according to claim 4, characterized in that: The mounting frame has an inner mounting groove; the side of the baffle is inserted into the mounting groove and connected to the mounting frame.

6. The cement stabilized macadam base mixture discharging anti-segregation device according to claim 5, characterized in that: It also includes a support mechanism; the support mechanism includes a support plate, a first hinge seat, a slider, a second hinge seat, and a support rod; the support plate is arranged along the front-to-back direction, and its two ends are respectively fixedly connected to the front and rear sides of the mounting frame, and a vertical groove is provided on the right side of the support plate; the slider is slidably disposed in the groove; the first hinge seat is fixedly disposed on the right side of the slider; the second hinge seat is fixedly disposed on the right side wall of the hopper; the upper and lower ends of the support rod are respectively hinged to the first hinge seat and the second hinge seat.

7. The cement stabilized macadam base mixture discharging anti-segregation device according to claim 1, characterized in that: It also includes a stirring mechanism; two stirring mechanisms are provided at intervals in front and behind, including a rotating shaft, a spiral stirring blade, and a stirring motor; the rotating shaft is arranged in the hopper in the left-right direction, and its two ends are rotatably connected to the side wall of the hopper; the spiral stirring blade is arranged on the rotating shaft; the stirring motor is arranged on the right side wall of the hopper and connected to the rotating shaft.

Images