CN111790596A - A kind of stone particle size screening device and technological process - Google Patents

Abstract

The invention discloses a stone granularity screening device and a process flow, wherein the screening device comprises a feeding machine, a vibrating screen I, a vibrating screen II, a conveying belt and a storage bin, wherein the vibrating screen II is arranged at a position 5-7m away from the ground, the vibrating screen I is arranged above the vibrating screen II in an inclined manner, and the feeding machine is arranged above the vibrating screen I in an inclined manner; the conveying belts are respectively arranged between the feeding machine and the vibrating screen I, between the vibrating screen I and the vibrating screen II, between the vibrating screen I and the storage bin, and between the vibrating screen II and the storage bin; the process flow comprises the following steps: obtaining a large amount of stones and stacking the stones at a flat position close to a feeding machine; continuously feeding stones into a feeder; the stones are sequentially classified and screened by the vibrating screen I and the vibrating screen II and are respectively conveyed to the storage bin to be stacked. The method can quickly and efficiently screen out three types of stones, is convenient to directly use as required during sea reclamation, enhances the utilization rate of the stones, effectively solves the problem of poor sea reclamation quality caused by different stone granularity, has high efficiency and saves labor cost.

Description

A kind of stone particle size screening device and technological process

technical field

The invention belongs to the technical field of mechanical engineering, and particularly relates to a stone particle size screening device and a technological process.

Background technique

Offshore engineering involves quarrying and sea reclamation. After the concrete fortresses are stacked in the designated sea area, a large number of stones are still needed to be filled and compacted. On the one hand, in order to reduce the gap and increase the filling amount, the stones should not be too large; on the other hand Because seawater has great potential energy, the particle size of the stones should not be too small. Therefore, in order to ensure the filling effect, the stones need to be classified by particle size and filled in stages.

In order to utilize resources rationally, the stones used are obtained by on-site blasting. The size of the obtained stones is not uniform. First, they are manually screened, and the oversized stones are decomposed and transported to the stacking point. The remaining stones are mainly screened by excavators. However, the bucket of the excavator itself cannot screen out the stones with too small particle size, so that the final used stones contain a lot of crushed stones, and the sizes are mixed, which affects the quality of the reclamation project, and the stones with too small particle size are not effectively used. Utilization, resulting in waste of stone resources; if manual screening is used, it requires a lot of manpower and is inefficient, increasing costs.

SUMMARY OF THE INVENTION

The problem to be solved by the present invention is: to propose a stone particle size screening device and a process method to solve the problems that the uneven particle size of the stone affects the quality of marine engineering, the excavator or manual selection of the stone is not effective, and it is time-consuming and labor-intensive.

The technical scheme of the present invention is: a stone particle size screening device, comprising a feeder, a vibrating screen I, a vibrating screen II, a conveyor belt and a silo, the vibrating screen II is installed at a height of 5-7 m from the ground, and the vibrating screen is Ⅰ is installed obliquely above the vibrating screen II, and the feeder is installed obliquely above the vibrating screen I; the conveyor belts are respectively installed on the feeder and vibrating screen I, vibrating screen I and vibrating screen II, vibrating screen I and silo, vibrating screen II Between the feeder and the silo; the conveyor belt is connected between the discharge port of the feeder and the feed port of the vibrating screen I, the conveyor belt is respectively connected between the discharge port of the vibrating screen I and the feed port of the vibrating screen II and the silo, and the vibrating screen II and the vibrating screen are respectively connected with the conveyor belt. A conveyor belt is connected between the silos.

Set vibrating screens at different heights and low positions, and use conveyor belts to transfer stones to reduce the burden of transmission. Two-stage vibrating screens with different apertures are used to divide the stones into three types of stones according to their particle size, which are convenient for direct use when reclamation. Enhance the utilization rate of stones, effectively eliminate the problem of poor quality of reclamation caused by different particle sizes of stones, and have high efficiency and save labor costs.

Further, the vibrating screen I and vibrating screen II are separated by 2.5-3m vertically and 6.2-8.1m horizontally, and the feeder and vibrating screen I are separated by 2-2.5m vertically and 5.6-6.8m horizontally; After the block moves down, it enters the screening, and the potential energy is used to reduce the burden of the motor drive.

Further, the silo includes a silo I, a silo II and a silo III, the silo I is arranged obliquely below the vibrating screen I, and the silo II and the silo III are respectively arranged obliquely below the vibrating screen II; Stones of different particle sizes are stored for direct access.

Further, the discharging port of the vibrating screen I includes a discharging chute and a feeding port. The discharging chute is located under the screen and is arranged in parallel along the screen. Screen II feeding port; the stones with smaller particle size are screened out by vibrating screen I, and distributed to silo I for stacking.

Further, the discharging port of the vibrating screen II includes a discharging chute and a feeding port, the discharging chute is arranged below the screen mesh in parallel along the screen mesh, the discharging chute is connected to the conveyor belt to the silo II, and the discharging port is connected to the conveyor belt and extends. To the silo III; the larger and larger-sized stones are screened out by the vibrating screen II, and sent to the silo II and the silo III for stacking.

Further, the aperture size of the screen of the vibrating screen I is 8 × 8 cm, and the aperture size of the screen of the vibrating screen II is 15 × 15 cm; screen out three grades of stones with different particle sizes, and use them in stages from large to small. Improve the utilization rate of stones and enhance the filling effect of sea areas.

Further, the conveyor belt is made of rubber material, the central depression is arc-shaped, and a support device is arranged under the conveyor belt, the support device includes a bracket and a rotating rod, the two ends of the rotating rod are rotatably connected with the bracket, and the side wall of the rotating rod is connected with the bottom of the conveyor belt. Surface contact; the conveyor belt is curved in an arc shape, which is conducive to the transmission of loaded stones and avoids the falling of stones caused by vibration. The rotary rod is connected with the bracket to support the conveyor belt to move, and the resistance of the conveyor belt to move is reduced by rotation.

Further, the length of the rotating rod is less than the width of the conveyor belt, and the rotating rod is provided with a group of rotating rods at intervals of 1-1.5m along the length of the conveyor belt. The rod is installed along the curved arc of the conveyor belt, which is beneficial to fit the conveyor belt to play a supporting role and maintain the balance of the conveyor belt.

A technological process of a stone particle size screening device, comprising the following processes:

C1: Get a lot of stones and stack them on the level near the feeder (1);

C2: Continuously put the stones into the feeder (1);

C3: The stones enter the vibrating screen I (2) feed hopper through the conveyor belt (4), the stones pass through the screen, and the stones whose volume is not smaller than the screen enter the conveyor belt (4) through the feeding port, and pass through the conveyor belt (4) It is transferred to the feed port of vibrating screen II (3), and the stones with a volume smaller than the screen aperture fall to the discharge chute under the screen, and are transferred to the silo I through the conveyor belt (4);

C4: Stones enter the vibrating screen II (3) feed hopper and pass through the screen, and the stones whose volume is not smaller than the screen aperture of the vibrating screen II (3) enter the conveyor belt (4) from the feeding port, and pass through the conveyor belt (4) The stones are transferred to the silo III, and the stones with a volume smaller than the screen aperture fall into the discharge chute under the screen, and are transferred to the silo II through the conveyor belt (4).

The beneficial effects of the present invention are:

(1) It is installed on three layers with a feeder and two vibrating screens, and the feeder automatically feeds the material into the vibrating screen for screening, and the aperture of the upper screen of the vibrating screen is 8×8cm, and the aperture of the lower screen is 15×15cm. , grading and screening out stones of different particle sizes, and collecting and stacking them separately. The screened stone particle size bin I < bin II < bin III, and directly use the stones of the required particle size according to the specific situation, which is not only fast and convenient , save time and effort, and improve project quality and efficiency, save costs;

(2) The stones screened by the invention are uniform and distinct in size, and the screening efficiency is high, and the stones that meet the requirements can be supplied in time, and the construction quality can be effectively improved;

(3) The stones with the smallest particle size screened out do not meet the requirements for reclamation, and can be used for other purposes such as road paving, and the resources can be used rationally;

(4) The conveyor belt used in the present invention is different from the ordinary plane conveyor belt, and the concave forms a curved surface, which is conducive to containing the stones in the conveyor belt, avoiding the vibration caused the stones to fall and affecting the screening quality, and reducing the potential safety hazard;

A rotating rod is used to support the conveyor belt. The rotating rod rotates around the bracket during transmission, and the friction between the rotating rod and the conveyor belt is changed from static friction to dynamic friction, which reduces the resistance of the conveyor belt. In addition, three rotating rods are set to match the curved shape of the conveyor belt. Side and bottom fit conveyor belt supports to maintain belt stability.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Figure 2 is a schematic top view of the structure of the conveyor belt.

Detailed ways

The present invention will be explained in detail below with reference to the accompanying drawings, so that those skilled in the art can better understand.

A stone particle size screening device includes a feeder 1, a vibrating screen I2, a vibrating screen II3, a conveyor belt 4 and a silo 5.

Specifically, a 1360WL feeder 1 is used, with a single machine capacity of 200-450t/h. First build a feeding platform near the stone storage area. The height of the feeding platform is 2.5m, the length x width: 9.1 x 8.3m, the length x width of the foundation: 7m x 6m, and the thickness of the foundation is 0.8m. A 50cm×50cm steel plate embedded part is set before the concrete, and it is welded with the embedded steel plate as a whole. The feeder 1 is arranged on the feeding platform and fixed by welding with the steel plate.

Vibrating screen Ⅰ2, using 2YS2570 type vibrating screen, the screen mesh aperture is 8×8cm, firstly build a vibrating platform below the feeder 1 at a vertical distance of 2.5m and a horizontal distance of 6.8m, and its basic length×width: 7m× 6m, the thickness is 0.8m, before pouring concrete, set 50cm×50cm steel plate embedded parts at the design position of the equipment column, and welded with the embedded steel plate as a whole. The vibrating screen I2 is placed on the vibrating platform and fixed by welding with the steel plate.

Vibrating screen II3, using 2YS2570 type vibrating screen, the screen mesh aperture is 15×15cm, first build a vibrating platform below the vibrating screen I at a vertical distance of 2.5m and a horizontal distance of 8m. Its basic length×width: 7m×6m, thickness The length is 0.8m. Before pouring concrete, set 50cm×50cm steel plate embedded parts at the design position of the equipment column, and weld with the embedded steel plate as a whole. The vibrating screen II3 is placed on the vibrating platform and fixed by welding with the steel plate.

The feeder 1, the vibrating screen I2, and the vibrating screen II3 are installed in three layers from high to low. The silo 5 includes a silo I51, a silo II52 and a silo III53. Silo II52 and Silo III53 are respectively set obliquely below vibrating screen I2, and are used to store stones with different particle sizes, which are convenient for direct access and improve construction efficiency.

Stones are transported between the discharge port of the feeder 1 and the feed port of the vibrating screen I2 by connecting the conveyor belt 4. The discharge port of the vibrating screen I2 includes a discharge chute and a feeding port. The discharge chute is located under the screen and parallel to the screen. Arrangement, the discharge chute is connected to the conveyor belt 4 to the silo I51, and the delivery port is connected to the conveyor belt 4 to the feed port of the vibrating screen II3. Similarly, the discharge port of vibrating screen II3 includes a discharge chute and a feeding port. The discharging chute is located under the screen and is arranged in parallel along the screen. The discharge chute is connected to the conveyor belt 4 to the silo II52, and the discharge port is connected to the conveyor belt 4 and extends. to silo III53.

Through vibrating screen I2 and vibrating screen II3, the stones of different particle sizes are screened out by classification, and they are collected and stacked separately, which is not only fast and convenient, saves time and labor, but also improves the quality and efficiency of the project and saves costs.

The conveyor belt 4 is made of rubber material, with a thickness of 3cm and a width of 0.6m. The middle concave is lower than the two edges in an arc shape, which is convenient for holding stones and avoids the leakage of stones caused by vibration; a support device is provided under the conveyor belt 4 to support the conveyor belt. 4. The weight of the stone blocks keeps the conveyor belt 4 in a straight line. The support device includes a bracket 41 and a rotating rod 42. The bracket 41 is arranged along the conveying direction of the conveyor belt 4. The rotating rod 42 is a cylinder with a length of 25 cm and a diameter of 8 cm. 41 is connected by rotation, and the side wall of the rotating rod 42 is in contact with the lower surface of the conveyor belt 4, which lifts the conveyor belt 4 and facilitates the movement of the conveyor belt 4; the rotating rod 42 is arranged in a group every 1m, and each group contains 3 rotating rods 42, The three rotating rods 42 are arranged in sequence along the width direction of the conveyor belt 4 , which can better stabilize the conveyor belt 4 .

After setting the screening device according to the above, first test the vibrating screen:

S1: Before commissioning, check whether the vibrating screen meets the installation requirements, and whether there are personnel or foreign objects on the vibrating screen to be removed; rotate the vibration source before commissioning to ensure flexible rotation and no jamming phenomenon;

S2: Press the power button to observe whether the two motors rotate in the opposite direction to each other and satisfy the upper rotation direction of the motor cover; observe whether the rotation directions of the eccentric blocks of the two axes of the vibration source are opposite, and satisfy the direction indicated by the arrow;

S3: When the jogging proves that the rotation direction is correct, the vibrating screen is officially started to enter the no-load working state; after starting, observe whether there is abnormal noise in each part of the vibrating screen, and tighten it in time if it is found to be loose, and the no-load test run is continued for 4 hours. It is required that the vibrating screen runs smoothly, without abnormal noise, the amplitude and motion trajectory meet the requirements, and the maximum temperature of the vibration source bearing does not exceed 75 ℃.

A technical process for particle size screening of stones, comprising the following steps:

C1: Get a lot of stones and stack them on the level near the feeder 1;

C2: put the stones into feeder 1 continuously;

C3: The stones enter the feeding hopper of the vibrating screen Ⅰ2 through the conveyor belt 4, the stones pass through the screen, and the stones whose volume is not smaller than the screen enter the conveyor belt 4 through the feeding port, and are transmitted to the feeding port of the vibrating screen II3 through the conveyor belt 4. Stones with a volume smaller than the screen aperture fall to the discharge chute below the screen, and are transferred to the silo I51 through the conveyor belt 4;

C4: Stones enter into the vibrating screen II 3 feeding hopper and pass through the screen, and the volume is not smaller than that of the vibrating screen II (3) The stone with the screen mesh aperture enters the conveyor belt 4 from the feeding port, and is transmitted to the silo III53 through the conveyor belt 4. The volume Stones smaller than the screen aperture fall to the discharge chute below the screen, and are transferred to the silo II52 through the conveyor belt 4.

In the present invention, the stones are automatically fed by the feeder 1 and passed through the conveyor belt 4 to enter the vibrating screen I2 for screening, and the screen aperture of the vibrating screen I2 is 8×8 cm, and the stones with a particle size smaller than the screen aperture fall into the lower part and are discharged. The trough is then transported to the silo I51 by the conveyor belt 4. The stones with a particle size larger than the screen aperture are transported from the feeding port of the vibrating screen I2 to the feeding port of the vibrating screen II3 through the conveyor belt 4. The screen aperture of the vibrating screen II3 is 15×15cm , the stones with a particle size smaller than the screen aperture fall into the lower discharge chute, and then are transported to the silo II52 by the conveyor belt 4, and the stones with a particle size larger than the screen aperture are transported from the feeding port of the vibrating screen II3 through the conveyor belt 4 to the silo III. . Grading and screening out the stones of different particle size, and collecting and stacking them respectively, the screened stone particle size bin I51 < bin II 52 < bin III 53, according to the specific situation, the stone of the required particle size is directly used, which is not only fast and convenient, but also Save time and effort, improve project quality and efficiency, and save costs.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (9)

1. A stone particle size screening device of claim 1, the screening device includes batcher (1), shale shaker I (2), shale shaker II (3), conveyer belt (4) and feed bin (5), its characterized in that: the vibrating screen II (3) is arranged at a height of 5-7m from the ground, the vibrating screen I (2) is arranged above the vibrating screen II (3) in an inclined mode, and the feeding machine (1) is arranged above the vibrating screen I (2) in an inclined mode;

conveyer belt (4) are connected between batcher (1) discharge gate and shale shaker I (2) feed inlet, are connected conveyer belt (4) respectively between shale shaker I (2) discharge gate and II (2) feed inlets of shale shaker and feed bin (5), are connected conveyer belt (4) between II (3) of shale shaker and feed bin (5).

2. The stone grain size screen of claim 1, wherein: the distance between the vibrating screen I (2) and the vibrating screen II (3) is 2.5-3m in the longitudinal direction and 6.2-8.1m in the horizontal direction, and the distance between the feeding machine (1) and the vibrating screen I (2) is 2-2.5m in the longitudinal direction and 5.6-6.8m in the horizontal direction.

3. The stone grain size screen of claim 1, wherein: feed bin (5) are including feed bin I (51), feed bin II (52) and feed bin III (53), and feed bin I (51) set up in shale shaker I (2) oblique below, and set up respectively in shale shaker II (3) oblique below in feed bin II (52) and feed bin III (53).

4. A stone grain size screening apparatus as claimed in claim 3, wherein: the discharge gate of vibrating screen I (2) includes blown down tank and conveying mouth, and the blown down tank is located screen cloth below along screen cloth parallel arrangement, and conveyer belt to feed bin I (51) are connected to the blown down tank, and conveying mouth connects conveyer belt to vibrating screen II (3) feed inlet.

5. A stone grain size screening apparatus as claimed in claim 3, wherein: the discharge gate of the vibrating screen II (3) comprises a discharge chute and a conveying port, the discharge chute is located below the screen and arranged in parallel along the screen, the discharge chute is connected with a conveyor belt to the bin II (52), and the conveying port is connected with the conveyor belt and extends to the bin III (53).

6. The stone grain size screen of claim 1, wherein: the screen mesh of the vibrating screen I (2) is 8 multiplied by 8cm in aperture, and the screen mesh of the vibrating screen II (3) is 15 multiplied by 15cm in aperture.

7. The stone grain size screen of claim 1, wherein: conveyer belt (4) adopt rubber materials to make, and central authorities are sunken to be the arc, and conveyer belt (4) below is equipped with strutting arrangement, strutting arrangement includes support (41) and swing arm (42), and swing arm (42) both ends are rotated with support (41) and are connected, swing arm (42) lateral wall and conveyer belt (4) bottom surface contact.

8. The stone grain size screen of claim 7, wherein: the length of the rotary rod (42) is smaller than the width of the conveyor belt (4), the conveyor belt (4) is provided with a group of rotary rods (42) every 1-1.5m along the conveying direction, the group of rotary rods (42) comprises 3 rotary rods (42), and the 3 rotary rods (42) are arranged side by side.

9. The screening process of the stone grain size screening apparatus of any one of claims 1 to 8, comprising the steps of:

c1: obtaining a large amount of stones and stacking the stones at a flat position close to the feeder (1);

c2: continuously feeding the stone blocks into a feeder (1);

c3: the stone enters a feed hopper of the vibrating screen I (2) through a conveyor belt (4), passes through the screen, enters the conveyor belt (4) through a material conveying port, and is conveyed to a material inlet of the vibrating screen II (3) through the conveyor belt (4), and the stone with the volume smaller than the aperture of the screen falls into a discharge chute below the screen and is conveyed to a material bin I through the conveyor belt (4);

c4: the stone gets into behind the shale shaker II (3) feeder hopper through the screen cloth, and the stone that the volume is not less than II (3) screen cloth apertures of shale shaker gets into conveyer belt (4) from defeated material mouth to pass to feed bin III through conveyer belt (4), the stone that the volume is less than screen cloth apertures falls screen cloth below blown down tank, and passes to feed bin II through conveyer belt (4).

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