A belt head quantitative sampling device suitable for granular materials

Abstract

The utility model relates to a kind of belt head quantitative sampling device suitable for granular material.The device capacity constant, simple structure, it is convenient to install, it does not need manual participation, can guarantee the original airtightness of belt head, while, it is realized in the scientific and efficient full-automatic sampling work of granular material to belt head, the sampling frequency of the device, sampling time can be adjusted by PLC control system, make sampling work become simple and efficient.

Description

Technical Field

[0001] This utility model relates to an online material sampling device, specifically a quantitative sampling device for the head of a conveyor belt suitable for granular materials. Background Technology

[0002] In industries such as grain, chemicals, and mining, production processes often involve conveyor belts transporting granular materials, and sampling at the conveyor head is common. Common sampling methods include manual and automatic sampling; with technological advancements, manual sampling is gradually being replaced by automatic sampling. Currently, sampling at the conveyor head typically employs spiral sampling devices and flip-plate sampling devices. Spiral sampling devices can affect the particle size of the granular material, which is often an important analytical indicator; flip-plate sampling devices require precise control over the distance of the material flow from the casing and the height of the sampling point. Both of these sampling devices have limitations for sampling at the conveyor head and cannot achieve accurate quantitative sampling. A quantitative sampling device suitable for the conveyor head of granular materials addresses the shortcomings of the above two sampling devices, enabling scientific quantitative sampling of granular materials. Summary of the Invention

[0003] This utility model is a quantitative sampling device for the head of a conveyor belt suitable for granular materials. The device has a constant capacity, simple structure, and is easy to install. It does not require manual intervention and can ensure the original airtightness of the conveyor belt head. It can realize scientific and efficient sampling of granular materials at the head of the conveyor belt. The sampling number, sampling frequency, and sampling time of the device can be adjusted by the PLC control system (10).

[0004] The technical solution adopted in this utility model is: a quantitative sampling device for the head of a conveyor belt suitable for granular materials, characterized in that: it includes a shell (2), a clamp (4), a cylinder (1), a receiving piston (6), an extension rod (5), a discharge pipe (8), and a vacuum conveyor (9); the receiving piston (6) is placed inside the shell (2) and connected to the cylinder (1) through the extension rod (5), the cylinder (1) and the shell (2) are fixed by bolts, and the vacuum conveyor (9) is connected to the discharge pipe (8); a hole is opened at the outer shell of the conveyor belt, and a welding flange (3) is welded to the opening. After the shell (2) is fixed by the clamp (4), it is inserted into the opening and connected and fixed to the welding flange (3). The clamp (4) is provided with a fixing hole, which serves to fix the shell (2) and adjust the position of the shell (2). The cylinder (1) drives the receiving piston (6) to reciprocate within the housing (2). The internal volume of the receiving piston (6) is fixed. When it extends, the material can enter the receiving piston (6) through the receiving port (25). The sealing cover (24) is welded to the outside of the housing (2) and encloses the air holes I (22) and II (23). When the receiving piston (6) retracts, the air inlet (21), air holes I (22), air holes II (23), and the discharge pipe (8) form an air circulation loop. The receiving piston (6) is equipped with a sealing ring (7) to ensure the airtightness of the air circulation loop. When the vacuum conveyor (9) is working, a negative pressure can be generated in the discharge pipe (8) to move the material out of the discharge pipe (8) by pneumatic conveying. The volume of the receiving piston (6) is fixed, and the required sampling amount can be obtained by calculating and adjusting the number of samplings.

[0005] The beneficial effects of this utility model are:

[0006] This invention is applicable to sampling of particulate materials at the head of belts and in chutes. The sampling process does not affect the particle size of the particulate materials, ensuring the representativeness of the sample particle size.

[0007] This utility model has a simple structure and small size. It can be moved back and forth by tightening and loosening the clamp (4) to accurately intercept the material flow. It has strong applicability to complex spatial structures.

[0008] This utility model is equipped with a vacuum conveyor (9), which generates negative pressure to draw in gas through an air inlet (21) located outside the conveyor belt, which can avoid drawing in impurity gas inside the conveyor belt and ensure the representativeness of the sample.

[0009] This utility model has a cleaning function for each sampling, which can clean up the material accumulated at the receiving port (25) during non-sampling time, ensuring that the sample taken is not contaminated.

[0010] The discharge pipe (8) of this utility model can be connected to the vacuum conveyor (9) by a hose (11), so that the vacuum conveyor (9) can be placed in a flexible position, and the sample barrel can be placed at a higher position to transport the material from a lower point to a higher position. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a quantitative sampling device for the head of a belt conveyor for granular materials in the unsampled state.

[0012] Figure 2 This is a schematic diagram of the structure of a quantitative sampling device for the head of a belt conveyor suitable for granular materials, with the receiving piston (6) in the extended state.

[0013] Figure 3 This is a schematic diagram of the structure of a quantitative sampling device for belt heads suitable for granular materials, showing the receiving piston (6) in its retracted state after receiving material.

[0014] In the diagram: 1. Cylinder, 2. Housing, 21. Air inlet, 22. Air port I, 23. Air port II, 24. Sealing cover, 25. Material inlet, 3. Welded flange, 4. Clamp, 5. Extension rod, 6. Material receiving piston, 7. Sealing ring, 8. Discharge pipe, 9. Vacuum conveyor, 10. PLC control system, 11. Hose; Detailed Implementation

[0015] A quantitative sampling device for belt heads suitable for granular materials, the mechanism of which is as follows: Figure 1 As shown, it includes a cylinder (1), a housing (2), a welding flange (3), a clamp (4), an extension rod (5), a receiving piston (6), a sealing ring (7), a discharge pipe (8), a vacuum conveyor (9), and a PLC control system (10). After the head housing of the conveyor belt is opened, the welding flange (3) covers the hole and welds it. The clamp (4) wraps around the housing (2) and locks it, and inserts it into the hole opened in the housing of the conveyor belt. It is fixed by the welding flange (3) and the clamp (4). The sample barrel (12) can be placed at a high place for easy handling. The vacuum conveyor (9) is placed above the sample barrel (12) and connected to the discharge pipe (8) through the hose (11), thus completing the installation of the entire sampling device.

[0016] During non-sampling time, the receiving piston (6), connected to the cylinder (1) via the extension rod (5), is in a retracted state, and the receiving port (25) is placed on the material running trajectory, where the material accumulates inside the receiving port (25). During sampling, the PLC control system (10) issues a command, and the cylinder (1) drives the receiving piston (6) to move forward. The end face of the receiving piston (6) cleans up the material that was originally accumulated in the receiving port (25), and at the same time, new material falls into the cavity of the receiving piston (6) until the set dwell time is reached. After a while, the PLC control system (10) retracts the cylinder (1), and the material in the cavity of the receiving piston (6) falls into the discharge pipe (8). At the same time, the vacuum conveyor (9) is started, which generates an airflow from the air inlet (21), air inlet I (22), air inlet II (23) to the discharge pipe (8). The airflow carries the intercepted material out of the vacuum conveyor (9) outlet along the discharge pipe (8) and the hose (11), and finally falls into the sample barrel (12), thus completing the entire sampling process.

Claims

1. A quantitative sampling device for belt conveyor heads suitable for granular materials, characterized in that: It includes a housing (2), a clamp (4), a cylinder (1), a receiving piston (6), an extension rod (5), a discharge pipe (8), and a vacuum conveyor (9); the receiving piston (6) is placed inside the housing (2) and connected to the cylinder (1) through the extension rod (5), the cylinder (1) is fixed to the housing (2) by bolts, and the vacuum conveyor (9) is connected to the conveying pipe; a hole is made at the outer shell of the belt conveyor, and a welding flange (3) is welded to the hole. After the housing (2) is fixed by the clamp (4), it is inserted into the hole and connected and fixed to the welding flange (3).

2. The quantitative sampling device for belt heads of granular materials according to claim 1, characterized in that: The clamp (4) is provided with fixing holes, which serve to fix the shell (2) and adjust the position of the shell (2).

3. The quantitative sampling device for belt heads of granular materials according to claim 1, characterized in that: The cylinder (1) can drive the receiving piston (6) to reciprocate within the housing (2). The internal volume of the receiving piston (6) is fixed. When it extends, the material can enter the receiving piston (6) through the receiving port (25).

4. The quantitative sampling device for belt heads suitable for granular materials according to claim 1, characterized in that: When the vacuum conveyor (9) is working, negative pressure can be generated in the conveying pipe, and the material is moved out from the discharge pipe (8) by pneumatic conveying.

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