Stand column with magnetic attraction device

Abstract

The utility model discloses an upright post with a magnetic device, which relates to the technical field of oil cylinders and comprises an upright post body, the upright post body comprises an upright post cylinder body, a piston rod is arranged at the top of the upright post cylinder body, an oil outlet and an oil return port are mounted on the surface of the upright post cylinder body, and a sealing cover is arranged at the bottom of the upright post cylinder body. An oil cavity is formed between the sealing cover and the stand column cylinder body, and a magnetic attraction device is arranged in the oil cavity. Therefore, the magnetic attraction device is additionally arranged in the oil cavity of the stand column cylinder body, iron chips are attracted, the service life of the oil cylinder is prolonged, and supporting safety is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a column with a magnetic attraction device. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has a simple structure, reliable operation, and smooth reciprocating motion, making it widely used in the hydraulic systems of various machines.

[0003] In coal mining machinery, a large number of hydraulic cylinders are used as support columns to support and protect important parts such as roadways. As metal components, the piston rods of the support columns are subject to wear during operation. Some iron filings, after adhering to impurities, fall into the cylinder through friction. With the extension and retraction of the piston rod, they enter the internal sealing ring. Frequent friction between the iron filings and the sealing ring reduces the service life of the seals and damages the plating of the support column. Numerous scratches can easily cause leakage in the support column, making inspection and maintenance difficult. Utility Model Content

[0004] To overcome the above-mentioned defects, the purpose of this utility model is to provide a column with a magnetic attraction device, which adds a magnetic attraction device to the oil chamber of the column cylinder to achieve the attraction of iron filings, improve the service life of the oil cylinder, and ensure support safety.

[0005] To achieve the above objectives, this utility model provides a column with a magnetic attraction device, including a column body, the column body including a column cylinder, the top of the column cylinder being provided with a piston rod, and an oil outlet and an oil return port being installed on the surface, the bottom of the column cylinder being a sealing cover, and an oil cavity being formed between the sealing cover and the column cylinder, and a magnetic attraction device being provided in the oil cavity.

[0006] Preferably, the column cylinder body is a three-stage telescopic column, which includes an outer cylinder, a middle cylinder and an inner cylinder arranged coaxially from the outside to the inside. The bottom of the middle cylinder is provided with a boss. The magnetic attraction device is a magnetic ring, which is sleeved on the boss and fixed to the boss by a fixing member.

[0007] Preferably, the fastener is a hexagonal bolt, and the height of the boss is greater than the height of the fastener after it is fixed.

[0008] Preferably, the piston rod has a connecting hole at its end, and the opening of the connecting hole is flared.

[0009] Preferably, the axial direction of the connecting hole is parallel to the oil return port.

[0010] The beneficial technical effects achieved by this utility model after adopting the above technical solution are as follows:

[0011] 1. The column body includes a column cylinder. A piston rod is located at the top of the column cylinder, and an oil outlet and an oil return port are mounted on its surface. A sealing cover is located at the bottom of the column cylinder, and an oil chamber is formed between the sealing cover and the column cylinder. A magnetic attraction device is installed within the oil chamber. Due to the magnetic attraction device, when the returning liquid passes through the oil chamber, any magnetic impurities will be attracted, thus preventing continuous wear on the sealing ring. This minor improvement extends the service life of the equipment, making it particularly suitable for harsh environments such as mines. Quick cleaning and maintenance are easily achieved by simply opening the sealing cover.

[0012] 2. The traditional column body has been improved, especially by setting the orientation of the piston rod connection hole parallel to the oil return port and changing the position of the oil return port. This has increased the modification cost during installation, but it can directly avoid motion interference during installation and use. Especially in some inclined roadways, it will not collide with pipelines and valves during the tilting process, thus improving the safety of the equipment and simplifying the installation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 yes Figure 1 Cross-sectional view at point AA;

[0015] Figure 3 This is a three-dimensional structural diagram with the bottom sealing cap removed;

[0016] In the diagram,

[0017] 1. Column body; 11. Piston rod; 111. Connecting hole; 12. Sealing cover; 13. Outer cylinder; 14. Middle cylinder; 141. Boss; 15. Inner cylinder;

[0018] 2. Magnetic ring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0020] See Figures 1-3This invention provides a column with a magnetic attraction device, comprising a column body 1, a column cylinder, a piston rod 11 at the top of the cylinder, and an oil outlet and return port on the surface. A sealing cover 12 is located at the bottom of the cylinder, and an oil chamber is formed between the sealing cover 12 and the cylinder. A magnetic attraction device is installed within the oil chamber. The column cylinder and piston rod 11 are generally made of ferrous metal. When hydraulic oil passes through the oil outlet and return port into the oil chamber, ferrous impurities in the hydraulic oil are attracted by the magnetic attraction device. The most commonly used magnetic attraction device is a magnetic ring 2. This invention is a three-stage telescopic column. Impurities generated in the middle cylinder 14 and outer cylinder 13, and the column body 1, which is generally installed vertically, will eventually deposit at the bottom of the column body 1 according to the law of gravity. Therefore, placing a magnetic ring 2 at the bottom of the column body 1 maximizes the attraction of impurities, improving and extending the service life of the column body 1. Besides magnetic ring 2, magnetic suction devices can also use magnetic oil suction filters, but the cost is high and they are not suitable for large-scale promotion, especially for placement in small oil chambers.

[0021] The column cylinder of this utility model is a three-stage telescopic column, comprising an outer cylinder 13, a middle cylinder 14, and an inner cylinder 15 arranged coaxially from the outside in. The bottom of the middle cylinder 14 has a boss 141. The magnetic attraction device is a magnetic ring 2, which is fitted onto the boss 141 and fixed to it by a fastener. The fastener in this utility model is a hexagonal bolt, and the height of the boss 141 is greater than the height of the fastener after fixing. The boss 141 serves as a protective element; when the middle cylinder 14 retracts, it will collide with the bottom sealing cover 12. Adding the boss 141 not only facilitates installation but also prevents damage to the magnetic ring 2 due to impact. The magnetic ring 2, installed at the bottom of the middle cylinder 14, can effectively attract iron filings generated from various chambers. Furthermore, when the sealing ring of the column reaches the end of its service life and needs replacement, the magnetic ring 2 can be removed for cleaning, and then reinstalled after cleaning.

[0022] The piston rod 11 of this invention has a connecting hole 111 at its end, and the opening of the connecting hole 111 is flared. The connecting hole 111 is used to connect the piston rod 11 to other support equipment. The axial direction of the connecting hole 111 in this invention is parallel to the return oil port. In traditional designs, the connecting hole 111 is perpendicular to the return oil port, which makes it difficult to adjust the tilt angle when used for roadway support. Therefore, by aligning the axial direction of the connecting hole 111 parallel to the return oil port, the installed fixing pin can be rotated slightly by a certain angle, thus broadening its applicability.

[0023] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A column with a magnetic attraction device, comprising a column body, the column body including a column cylinder, the top of the column cylinder being provided with a piston rod, and an oil outlet and an oil return port being mounted on its surface, characterized in that, The bottom of the column cylinder is a sealing cover, and there is an oil cavity between the sealing cover and the column cylinder. A magnetic attraction device is provided in the oil cavity.

2. The column with a magnetic attraction device according to claim 1, characterized in that, The column cylinder body is a three-stage telescopic column, which includes an outer cylinder, a middle cylinder and an inner cylinder arranged coaxially from the outside to the inside. The bottom of the middle cylinder is provided with a boss. The magnetic attraction device is a magnetic ring, which is sleeved on the boss and fixed to the boss by a fastener.

3. The column with a magnetic attraction device according to claim 2, characterized in that, The fastener is a hexagonal bolt, and the height of the boss is greater than the height of the fastener after it is fixed.

4. The column with a magnetic attraction device according to claim 1, characterized in that, The piston rod has a connecting hole at its end, and the opening of the connecting hole is flared.

5. The column with a magnetic attraction device according to claim 4, characterized in that, The axis of the connecting hole is parallel to the oil return port.

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