Piston type pneumatic conveying device

Abstract

A piston type pneumatic conveying device comprises a piston pump, a feeding pipe, an air inlet valve, an exhaust valve, a discharging pipe, a filter element and a filter element cylinder, the upper end of the air inlet valve is arranged on the feeding pipe, the lower end of the air inlet valve is arranged at the upper end of the filter element, the lower end of the exhaust valve is arranged on the discharging pipe, the upper end of the exhaust valve is arranged at the lower end of the filter element, and the filter element is arranged in the filter element cylinder. When the air cylinder of the piston pump is in an air suction stage, a mixture of gas and solid materials enters the filter element through the feeding pipe and the air inlet valve, the solid materials are isolated and left in the filter element, and the gas enters the air cylinder of the piston pump after being filtered by the filter element. When the air cylinder of the piston pump is in the exhaust stage, air in the air cylinder enters the filter element, solid materials in the filter element enter the discharging pipe together through the exhaust valve, and the solid materials are conveyed to a target position.

Description

Technical Field

[0001] The present invention relates to a pneumatic conveying device, in particular to a pneumatic conveying device in which a piston pump cylinder and a filter element are directly connected, and can be applied to fields where various solid particulate materials are conveyed by gas, such as the conveying of solid materials such as sand, plastic, food, coal, boiler ash dust, etc., and can also be applied to the conveying of a mixed fluid material of liquid and solid particles. Background Art

[0002] At present, a negative pressure pneumatic conveying device needs to use a negative pressure fan, a material separation tank and a discharger device for the suction, separation and conveying process of materials. This type of equipment has a large number, heavy weight, large volume, complex structure, low efficiency, high cost and short conveying distance. Summary of the Invention

[0003] The present invention realizes the process of sucking solid materials into the filter element cylinder when the cylinder is in the suction stage and discharging the solid materials from the filter element cylinder and conveying them to the target position by directly connecting the piston pump and the filter element. The equipment is simple and efficient. At the same time, the negative pressure of the piston pump is used for sucking and sending materials, and the positive pressure of the piston pump is used for conveying and discharging materials. The equipment is simple, reliable, high in efficiency, low in cost, light in weight, small in volume, long in conveying distance, and can also convey a mixed fluid of liquid and solid particles, avoiding the damage of solid particles to the piston and the cylinder block.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A piston-type pneumatic conveying device includes a piston pump, a feed pipe, an intake valve, an exhaust valve, a discharge pipe, a filter element and a filter element cylinder. The lower end of the intake valve is arranged on the feed pipe, the upper end of the intake valve is arranged on the upper end of the filter element, the lower end of the exhaust valve is arranged on the discharge pipe, the upper end of the exhaust valve is arranged on the lower end of the filter element, the filter element is arranged in the filter element cylinder, and the filter element cylinder is communicated with the cylinder cavity of the piston pump. When the cylinder of the piston pump is in the suction stage, a mixture of gas and solid materials enters the interior of the filter element through the intake valve, the solid materials are isolated and remain inside the filter element, and the gas enters the cylinder of the piston pump after being filtered by the filter element. When the cylinder of the piston pump is in the exhaust stage, the gas in the cylinder enters the interior of the filter element and causes the solid materials inside the filter element to enter the discharge pipe together through the exhaust valve and conveys the solid materials to the target position.

[0006] As an improvement of the present invention, the intake valve and the exhaust valve are one-way valves.

[0007] As an improvement of the present invention, the intake valve and the exhaust valve are swing check valves.

[0008] The beneficial effects of adopting the above technical solutions are as follows: By directly connecting the piston pump and the filter element, when the cylinder is in the suction stage, solid materials are sucked into the interior of the filter element. The separation of solid materials and gas is completed in the cavity of the filter element. The filtered gas enters the cylinder. When the cylinder is in the exhaust stage, the gas enters the filter element from the cylinder and is discharged to the discharge pipe together with the solid materials in the filter element through the exhaust valve, and the materials are transported to the target position. While using negative pressure to suck materials, positive pressure is used to transport solid materials. The equipment has a simple structure, is light in weight, small in size, high in efficiency, low in cost, long in conveying distance, and simple in maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic structural diagram of a piston-type pneumatic conveying device of the present invention.

[0010] The markings in the figure are:

[0011] 11 - Feed pipe, 12 - Intake valve, 13 - Exhaust valve, 14 - Discharge pipe, 15 - Filter element, 16 - Filter element cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The following will describe in detail the preferred embodiments of a pneumatic conveying device of the present invention with reference to the accompanying drawings.

[0013] Please refer to Figure 1 , Figure 1 which discloses a pneumatic conveying device of the present invention, including a piston pump, a feed pipe, an intake valve, an exhaust valve, a discharge pipe, a filter element and a filter element cylinder. The upper end of the intake valve is arranged on the feed pipe, the lower end of the intake valve is arranged on the upper end of the filter element, the lower end of the exhaust valve is arranged on the discharge pipe, the upper end of the exhaust valve is arranged on the lower end of the filter element, the filter element is arranged in the filter element cylinder, and the filter element cylinder is communicated with the cylinder cavity of the piston pump. When the cylinder of the piston pump is in the suction stage, the mixture of gas and solid materials enters the interior of the filter element through the intake valve. The solid materials are isolated and remain inside the filter element, while the gas enters the cylinder of the piston pump after being filtered by the filter element. When the cylinder of the piston pump is in the exhaust stage, the gas in the cylinder enters the interior of the filter element and together with the solid materials in the filter element passes through the exhaust valve into the discharge pipe and transports the solid materials to the target position.

[0014] In this embodiment, when the cylinder is in the exhaust stage, the gas can blow the solid particles on the inner surface of the filter element away from the surface of the filter element, extending the maintenance and service life of the filter element and reducing the gas pressure loss at the same time. When the fluid medium of this embodiment is changed to a liquid medium, this device can transport the mixed fluid of liquid and solid materials to the target position.

[0015] The embodiments described above are only descriptions of the preferred embodiments of the present invention. All applications and improvements made by those skilled in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A piston-type pneumatic conveying device, comprising a piston pump, a feed pipe (11), an air inlet valve (12), an air exhaust valve (13), a discharge pipe (14), a filter element (15) and a filter element cartridge (16), wherein the upper end of the air inlet valve (12) is arranged on the feed pipe (11), the lower end of the air inlet valve (12) is arranged on the upper end of the filter element (15), the lower end of the air exhaust valve (13) is arranged on the discharge pipe (14), the upper end of the air exhaust valve (13) is arranged on the lower end of the filter element (15), the filter element (15) is arranged in the filter element cartridge (16), and the filter element cartridge (16) and the piston pump are connected to each other. The cylinder cavity of the piston pump is connected. When the cylinder of the piston pump is in the suction stage, a mixture of gas and solid materials enters the interior of the filter element (15) through the feed pipe (11) and the intake valve (12), and the solid materials are isolated and retained in the filter element (15), while the gas enters the cylinder of the piston pump after being filtered by the filter element (15). When the cylinder of the piston pump is in the exhaust stage, the gas in the cylinder enters the interior of the filter element (15) and allows the solid materials in the filter element (15) to enter the discharge pipe (14) through the exhaust valve (13) and transport the solid materials to the target position.

2. A piston-type pneumatic conveying device according to claim 1, characterized in that: The air inlet valve (12) and the air exhaust valve (13) are one-way valves.

3. A piston-type pneumatic conveying device according to claim 2, characterized in that: The air inlet valve (12) and the air exhaust valve (13) are swing-type one-way valves.

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