Sand and gravel mixture screening device and sand and gravel screening method

Abstract

The present application relates to the technical field of building engineering, and particularly relates to a sandstone mixture screening device and a sandstone screening method. The sandstone mixture screening device comprises a feeding device, a first drying device, a screening device and a spraying device. The feeding device has a feeding cavity for conveying sandstone mixture. The first drying device is used for drying the sandstone mixture in the feeding cavity. The screening device has an upper and lower inclined or vertical screening cavity. A gate is arranged in the screening cavity. The gate separates the screening cavity into an upper cavity and a lower cavity arranged in an upper and lower interval. The upper end of the upper cavity is communicated with the discharging end of the feeding cavity. A stone screening module is arranged in the upper cavity. A sand screening module is arranged in the lower cavity. The spraying device is arranged in the upper cavity. The spraying device is used for washing the screened stones. The gate is closed. The spraying device sprays water on the stones remaining on the stone screening module. After drying and screening, the sand remaining on the outside of the stones is less. Therefore, the water consumption of the spraying is less.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering, in particular to a sandstone mixture screening device and a sandstone screening method. BACKGROUND

[0002] Screening sandstone is a crucial link in the production, processing and use of sandstone. This process not only concerns the quality and performance of sandstone products, but also directly affects the production quality and use effect of subsequent concrete or other building materials. Due to environmental conditions, sometimes it is necessary to screen the sandstone mixture in a wet state. At present, when screening the wet sandstone mixture, the wet sandstone mixture is usually washed first. Due to the large amount of sand adhering to the surface of the stone, a large amount of water is consumed when washing the sandstone mixture, resulting in waste of water resources. SUMMARY

[0003] The technical problem to be solved by the present application is that the water consumption is large when screening the wet sandstone mixture, resulting in waste of water resources.

[0004] In order to solve the above technical problems, the purpose of the present application is to provide a sandstone mixture screening device, which comprises a feeding device, a first drying device, a screening device and a spraying device.

[0005] The feeding device has a feeding cavity for conveying sandstone mixture.

[0006] The first drying device is used to dry the sandstone mixture in the feeding cavity.

[0007] The screening device has an upper and lower inclined or vertical screening cavity, a gate is arranged in the screening cavity, the gate separates the screening cavity into an upper cavity and a lower cavity arranged in an upper and lower spaced manner, the upper end of the upper cavity is in communication with the discharge end of the feeding cavity, a stone block screening module is arranged in the upper cavity, and a sand body screening module is arranged in the lower cavity.

[0008] The spraying device is arranged in the upper cavity, and is used to flush the screened stone blocks.

[0009] Wherein, the gate is opened, the sand body screened by the stone block screening module falls into the lower cavity; the gate is closed, and the spraying device sprays the stone blocks remaining on the stone block screening module.

[0010] As a preferred scheme, the gate is arranged in an upper and lower inclined manner, the screening device has a water outlet, the water outlet is in communication with the bottom of the upper cavity and is arranged close to the lower end of the gate.

[0011] As a preferred solution, the sand and stone mixture screening device further comprises a second drying device, which is used for drying the stone blocks in the upper cavity after being washed.

[0012] As a preferred solution, the conveying device comprises a conveying belt and a sealing shell covering the conveying belt, and the sealing shell and the conveying belt enclose the conveying cavity.

[0013] As a preferred solution, the sand and stone mixture screening device further comprises a first vibration device, which is used for driving the conveying belt to vibrate.

[0014] As a preferred solution, the first drying device comprises a hot air machine, and an air outlet end of the hot air machine is communicated with the conveying cavity.

[0015] As a preferred solution, the sand and stone mixture screening device further comprises an exhaust pipe, one end of the exhaust pipe is communicated with the conveying cavity, and the other end is communicated with the outside.

[0016] As a preferred solution, the sand and stone mixture screening device further comprises a second vibration device, and the screening device is arranged on the second vibration device.

[0017] A sand and stone screening method is provided, which adopts the sand and stone mixture screening device, and comprises the following steps.

[0018] The gate is opened and the spraying device is closed.

[0019] The conveying device and the first drying device are opened, and the sand and stone mixture is added into the conveying cavity.

[0020] After a certain amount of stone blocks are accumulated on the stone block screening module, the conveying device and the first drying device are closed.

[0021] The gate is closed and the spraying device is opened, and the stone blocks on the stone block screening module are sprayed.

[0022] As a preferred solution, the sand and stone mixture screening device further comprises a second drying device, and after the stone blocks on the stone block screening module are sprayed, the second drying device is opened to dry the stone blocks after being washed.

[0023] Compared with the prior art, the sand and stone mixture screening device has the following beneficial effects:

[0024] The sand and gravel mixture screening device of the present invention includes a conveying device, a first drying device, a screening device, and a spraying device; the conveying device has a conveying chamber for conveying the sand and gravel mixture; the first drying device is used to dry the sand and gravel mixture in the conveying chamber; the screening device has a screening chamber arranged vertically or inclined upwards, and a gate is provided in the screening chamber, which divides the screening chamber into an upper chamber and a lower chamber arranged vertically and alternately, the upper end of the upper chamber is connected to the discharge end of the conveying chamber, and a stone screening module is provided in the upper chamber. The lower cavity is equipped with a sand screening module; a spraying device is located in the upper cavity and is used to wash the screened stones; when the gate is opened, the sand screened by the stone screening module falls into the lower cavity; when the gate is closed, the spraying device sprays the stones remaining on the stone screening module. After drying and screening, there is less sand remaining on the outside of the stones, so the amount of water used for spraying is less. Closing the gate can prevent spraying water from entering the lower cavity, ensuring the dryness of the sand and facilitating the screening of the sand by the sand screening module. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the sand and gravel mixture screening device of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the screening device;

[0027] Figure 3 This is a schematic diagram of the sealed shell structure;

[0028] Figure 4 This is a schematic diagram of the conveyor belt structure;

[0029] Figure 5 This is a schematic diagram of the installation structure of a stone screening mesh plate;

[0030] Figure 6 This is a schematic diagram of the structure of the first excitation device;

[0031] In the diagram, 1 is the conveying device, 11 is the conveying chamber, 12 is the conveying belt, 13 is the sealing shell, 131 is the inlet, 14 is the sealing cover, 15 is the conveying pipe, 21 is the first drying device, 22 is the second drying device, 3 is the screening device, 31 is the screening chamber, 311 is the upper chamber, 312 is the lower chamber, 32 is the stone screening screen, 33 is the sand screening screen, 34 is the sealing door, 35 is the connecting frame, 4 is the spraying device, 5 is the gate, 61 is the exhaust pipe, 62 is the spray water recovery pipe, 71 is the first vibration device, 711 is the vibration table, 712 is the spring seat, 713 is the power transmission rod, and 72 is the second vibration device. Detailed Implementation

[0032] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0033] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. It should be understood that the terms "first," "second," etc., are used in this invention to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0034] like Figures 1 to 6 As shown, a preferred embodiment of the sand and gravel mixture screening device of the present invention includes a conveying device 1, a first drying device 21, a screening device 3, and a spraying device 4; the conveying device 1 has a conveying chamber 11 for conveying the sand and gravel mixture; the first drying device 21 is used to dry the sand and gravel mixture in the conveying chamber 11; the screening device 3 has a screening chamber 31 arranged vertically or inclined upwards, and a gate 5 is provided in the screening chamber 31. The gate 5 divides the screening chamber 31 into an upper cavity 311 and a lower cavity 312 arranged vertically and intermittently. The upper end of the upper cavity 311 is connected to the discharge end of the conveying chamber 11. The upper cavity 311 is equipped with a stone screening module, and the lower cavity 312 is equipped with a sand screening module. The spraying device 4 is installed in the upper cavity 311 and is used to wash the screened stones. When the gate 5 is opened, the sand screened by the stone screening module falls into the lower cavity 312. When the gate 5 is closed, the spraying device 4 sprays the stones remaining on the stone screening module. After drying and screening, there is less sand remaining on the outside of the stones, so the amount of water used for spraying is less. Closing the gate 5 can prevent the spraying water from entering the lower cavity 312, ensuring the dryness of the sand and facilitating the screening of the sand by the sand screening module.

[0035] The conveying device 1 includes a conveyor belt 12 and a sealing shell 13 covering the conveyor belt 12. The sealing shell 13 and the conveyor belt 12 together form a conveying cavity 11. Specifically, in this embodiment, the sealing shell 13 is a semi-circular cylinder. The sealing shell 13 covers the conveyor belt 12 and together with the conveyor belt 12 forms the conveying cavity 11. The sealing shell 13 can play the role of heat preservation and preventing sand diffusion. The sealing shell 13 has a first port near the screening device 3 and a second port away from the screening device 3. A sealing plate is connected to the second port, and an arc-shaped conveying pipe 15 is connected to the first port. The upper end of the conveying pipe 15 is connected to the first port, and the lower end of the conveying pipe 15 is connected to the upper end of the upper cavity 311. The sealing shell 13 is provided with an inlet 131 near the second port. A hopper is connected to the inlet 131 to facilitate the addition of moist sand and gravel mixture into the conveying cavity 11.

[0036] In this embodiment, the sand and gravel mixture screening device further includes a first vibration device 71, which drives the conveyor belt to vibrate. The vibration of the conveyor belt increases the heat exchange efficiency between the sand and gravel mixture and the hot air, improving the drying effect of the mixture. Furthermore, the first vibration device 71 also promotes the pre-separation of sand and stones in the mixture on the conveyor belt. The conveyor belt includes a drive roller assembly and a belt body wound around the drive roller assembly, which is connected to a support frame.

[0037] Specifically, the first vibration device 71 includes a vibration table 711, a spring seat 712 disposed at the bottom of the vibration table 711, and a power transmission rod 713 disposed on the vibration table 711. The end of the power transmission rod 713 away from the vibration table 711 extends below the conveyor belt 12, and the power transmission rod 713 pushes the conveyor belt 12 upward. The vibration table 711 is the vibration source, and the vibration of the vibration table 711 is transmitted to the conveyor belt 12 through the power transmission rod 713. Further, in this embodiment, the end of the power transmission rod 713 away from the vibration table 711 is connected to a roller through a rolling bearing, and the roller presses the conveyor belt 12 upward. The first drying device 21 includes a hot air blower. The air outlet of the hot air blower is connected to the conveying chamber 11. To ensure the drying effect, in this embodiment, multiple hot air blowers are provided, and the air outlet of each hot air blower is connected to the conveying chamber 11. The air outlets of each hot air blower are arranged sequentially at intervals along the length of the conveying chamber 11.

[0038] Furthermore, the sand and gravel mixture screening device also includes an exhaust pipe 61. One end of the exhaust pipe 61 is connected to the conveying chamber 11, and the other end is connected to the outside. The exhaust pipe 61 is used to discharge the water vapor formed by heating the sand and gravel mixture to the outside of the conveying chamber 11 in a timely manner, so as to prevent the water vapor from condensing into water on the inner wall of the conveying pipe 15 and dripping onto the conveying belt 12 again.

[0039] In this embodiment, the gate 5 is arranged at an angle, and the screening device 3 has a water outlet. The water outlet is connected to the bottom of the upper cavity 311 and is arranged near the lower end of the gate 5. After the spray water falls on the gate 5, it flows into the water outlet along the gate 5, which facilitates the recycling of the spray water. In this embodiment, the end of the water outlet away from the upper cavity 311 is connected to a spray water recycling pipe 62.

[0040] In this embodiment, the sand and gravel mixture screening device further includes a second drying device 22, which is used to dry the washed stones in the upper cavity 311. The second drying device 22 can dry the sprayed stones, ensuring that the stones processed by the sand and gravel mixture screening device are in a dry state, thus preventing the stones from being contaminated by moisture.

[0041] Furthermore, the sand and gravel mixture screening device also includes a second vibration device 72, on which the screening device 3 is mounted. The second vibration device 72 enables the screening device 3 to vibrate as a whole, thereby improving the screening effect.

[0042] In this embodiment, the stone screening module includes multiple stone screening mesh plates 32, each located in the upper cavity 311. The stone screening mesh plates 32 are arranged at intervals from top to bottom, and the mesh size of the upper stone screening mesh plates 32 is larger than that of the lower stone screening mesh plates 32. By controlling the mesh size of each stone screening mesh plate 32, screening of stones of different sizes can be achieved. The sand screening module includes multiple sand screening mesh plates 33, each located in the lower cavity 312. The sand screening mesh plates 33 are arranged at intervals from top to bottom, and the mesh size of the upper sand screening mesh plates 33 is larger than that of the lower sand screening mesh plates 33.

[0043] The screening device 3 includes a rectangular cylinder arranged at an angle, with the cylinder cavity forming a screening chamber 31. The side wall of the rectangular cylinder is provided with multiple openable sealing doors 34. One sealing door 34 is located at each of the stone screening screens 32 and each at each of the sand screening screens 33. The stone screening screens 32 and 33 can be replaced by opening the sealing doors 34. To facilitate disassembly of the stone screening screens 32 and 33, they are both installed in the screening device 3 using an insert-in method. Specifically, a connecting frame 35 is welded to the inner wall of the screening chamber 31, and the connecting frame 35 has slots into which the stone screening screens 32 and 33 are inserted. There are several ways to set the gate 5, such as setting a connecting frame 35 at the location of the gate 5, inserting the gate 5 into the slot, or setting the gate 5 as a valve body.

[0044] An embodiment of a sand and gravel screening method, using the above-mentioned sand and gravel mixture screening device, includes the following steps:

[0045] Open gate 5 and close sprinkler device 4;

[0046] Turn on the conveying device 1 and the first drying device 21, and add the sand and gravel mixture into the conveying chamber 11;

[0047] After a certain amount of stones have accumulated on the stone screening module, the conveying device and the first drying device 21 are turned off.

[0048] Close the gate 5 and turn on the spray device 4 to spray the stones on the stone screening module.

[0049] The sand and gravel mixture screening device also includes a second drying device 22. After spraying the stones on the stone screening module, the second drying device 22 is turned on to dry the washed stones.

[0050] In summary, the sand and gravel mixture screening device of the present invention includes a conveying device 1, a first drying device 21, a screening device 3, and a spraying device 4; the conveying device 1 has a conveying chamber 11 for conveying the sand and gravel mixture; the first drying device 21 is used to dry the sand and gravel mixture in the conveying chamber 11; the screening device 3 has a screening chamber 31 arranged vertically or inclined upwards, and a gate 5 is provided in the screening chamber 31. The gate 5 divides the screening chamber 31 into an upper chamber 311 and a lower chamber 312 arranged vertically and intermittently. The upper end of the upper chamber 311 is connected to the discharge end of the conveying chamber 11. The upper cavity 311 contains a stone screening module, and the lower cavity 312 contains a sand screening module. A spraying device 4 is installed in the upper cavity 311 and is used to wash the screened stones. When the gate 5 is opened, the sand screened by the stone screening module falls into the lower cavity 312. When the gate 5 is closed, the spraying device 4 sprays the stones remaining on the stone screening module. After drying and screening, there is less sand remaining on the outside of the stones, so the amount of water used for spraying is less. Closing the gate 5 can prevent spraying water from entering the lower cavity 312, ensuring the dryness of the sand and facilitating the screening of the sand by the sand screening module.

[0051] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A sand and gravel mixture screening device, characterized in that, It includes a material conveying device (1), a first drying device (21), a screening device (3), and a spraying device (4); The conveying device (1) has a conveying chamber (11) for conveying a mixture of sand and gravel. The first drying device (21) is used to dry the sand and gravel mixture in the conveying chamber (11); The screening device (3) has a screening chamber (31) arranged vertically or inclined up and down. A gate (5) is provided in the screening chamber (31). The gate (5) divides the screening chamber (31) into an upper cavity (311) and a lower cavity (312) arranged vertically. The upper end of the upper cavity (311) is connected to the discharge end of the conveying chamber (11). A stone screening module is provided in the upper cavity (311), and a sand screening module is provided in the lower cavity (312). The spraying device (4) is installed in the upper cavity (311) and is used to wash the sieved stones. When the gate (5) is opened, the sand separated by the stone screening module falls into the lower cavity (312); when the gate (5) is closed, the spraying device (4) sprays the stones remaining on the stone screening module. The sand and gravel mixture screening device also includes a second drying device (22), which is used to dry the washed stones in the upper cavity (311).

2. The sand and gravel mixture screening device according to claim 1, characterized in that, The gate (5) is arranged at an angle, and the screening device (3) has a water outlet. The water outlet is connected to the bottom of the upper cavity (311) and is arranged near the lower end of the gate (5).

3. The sand and gravel mixture screening device according to claim 1, characterized in that, The conveying device (1) includes a conveying belt (12) and a sealing shell (13) covering the conveying belt (12), wherein the sealing shell (13) and the conveying belt (12) enclose the conveying cavity (11).

4. The sand and gravel mixture screening device according to claim 3, characterized in that, The sand and gravel mixture screening device also includes a first vibration device (71), which is used to drive the conveyor belt (12) to vibrate.

5. The sand and gravel mixture screening device according to claim 3, characterized in that, The first drying device (21) includes a hot air blower, the air outlet of which is connected to the material conveying chamber (11).

6. The sand and gravel mixture screening device according to claim 3, characterized in that, The sand and gravel mixture screening device also includes an exhaust pipe (61), one end of which is connected to the conveying chamber (11), and the other end is connected to the outside.

7. The sand and gravel mixture screening device according to claim 1, characterized in that, The sand and gravel mixture screening device also includes a second excitation device (72), and the screening device (3) is disposed on the second excitation device (72).

8. A method for screening sand and gravel, characterized in that, Using the sand and gravel mixture screening device according to any one of claims 1 to 7, the sand and gravel screening method includes the following steps: Open the gate (5) and close the sprinkler system (4); Turn on the conveying device (1) and the first drying device (21) and add the sand and gravel mixture into the conveying chamber (11); After a certain amount of stones have accumulated on the stone screening module, the conveying device (1) and the first drying device (21) are turned off. Close the gate (5) and turn on the spray device (4) to spray the stones on the stone screening module.

9. The sand and gravel screening method according to claim 8, characterized in that, After spraying the stones on the stone screening module, the second drying device (22) is turned on to dry the washed stones.

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