High-low pressure lubrication station capable of directly flushing pipeline

Abstract

The high-low pressure lubrication station comprises an oil tank, a filter and a cooler, the oil tank is connected with the filter through a first pipeline and a second pipeline which are connected in parallel, low-pressure pump sets are arranged on the first pipeline and the second pipeline, and the filter is connected with the cooler. The output end of the cooler is connected with a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline which are connected in parallel, the third pipeline is connected with a low-pressure oil supply port, the fourth pipeline, the fifth pipeline and the sixth pipeline are connected with a high-pressure oil supply port, a normally-closed valve is arranged on the fourth pipeline, and a high-pressure pump set and a normally-open valve are arranged on the fifth pipeline; and a high-pressure pump set and a normally open valve are arranged on the sixth pipeline. The high-pressure pipeline and the low-pressure pipeline can be flushed at the same time only by opening the valve on the fourth pipeline and closing the valves on the fifth pipeline and the sixth pipeline.

Description

Technical Field

[0001] The present invention relates to the field of rapid flushing of high- and low-pressure lubrication system pipelines in metallurgy and other industrial fields, and in particular to a high- and low-pressure lubrication station capable of directly flushing the pipelines. Background Art

[0002] In heavy industry, high- and low-pressure lubrication stations are core auxiliary systems that ensure the safe and reliable operation of large, heavy-loaded equipment (such as rolling mill main motors). They minimize equipment wear and improve operational accuracy and lifespan. After equipment installation or overhaul, high- and low-pressure lubrication stations are essential for line flushing to ensure lubrication system oil cleanliness requirements. High- and low-pressure lubrication system pumps (usually plunger pumps) are not suitable for flushing, as they have low flow rates and poor contamination resistance. Therefore, low-pressure pumps (usually screw pumps) are typically used for line flushing.

[0003] However, the low-pressure pump unit is disconnected from the high-pressure oil supply line. Before flushing, the high-pressure and low-pressure oil supply lines must be disconnected, then welded together in series to form a temporary loop. The low-pressure pump unit is then activated to flush at a high flow rate until the system passes inspection. During the flushing process, the disconnected pipe openings must be protected from dust. After flushing, the oil supply lines must be restored to their original state to meet system operating requirements. This process, including pipe disassembly, temporary loops, dust protection, and pipe restoration, requires significant labor and materials, which is detrimental to project schedule and costs. Furthermore, there is a risk of contamination of the lubrication station during pipe disassembly. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a high- and low-pressure lubrication station that can directly perform pipeline flushing, which mainly solves the problem of achieving rapid flushing of high- and low-pressure lubrication systems.

[0005] To achieve the above object, the present invention is achieved through the following technical solutions:

[0006] A high- and low-pressure lubrication station capable of directly flushing pipelines comprises an oil tank, a filter, and a cooler. The oil tank is connected to the filter via a first pipeline and a second pipeline connected in parallel. A low-pressure pump group is provided on the first pipeline and the second pipeline. The filter is connected to the cooler. The output end of the cooler is connected to a third pipeline, a fourth pipeline, a fifth pipeline, and a sixth pipeline connected in parallel. The third pipeline is connected to a low-pressure oil supply port. The fourth pipeline, the fifth pipeline, and the sixth pipeline are connected to a high-pressure oil supply port. A normally closed valve is provided on the fourth pipeline. A high-pressure pump group and a normally open valve are provided on the fifth pipeline. A high-pressure pump group and a normally open valve are provided on the sixth pipeline.

[0007] Preferably, the output end of the cooler is connected to a seventh pipeline, the seventh pipeline is connected to the oil tank, and a normally closed valve is provided on the seventh pipeline.

[0008] Preferably, normally open ball valves are provided on the first pipeline and the second pipeline, and normally open valves are installed at the water supply port and the water outlet of the cooler.

[0009] The present invention has the following beneficial effects:

[0010] The present invention addresses the drawbacks of existing high and low pressure lubrication system pipeline flushing. In the high and low pressure lubrication station pipeline design, a pipeline (fourth pipeline) is added to connect the low pressure oil supply pipeline outlet in the lubrication station with the high pressure oil supply pipeline outlet. A valve is designed on the newly added pipeline to control the connection between the high and low pressure oil supply pipeline outlets by opening and closing the valve. During flushing, it is only necessary to open the valve on the fourth pipeline and close the valves on the fifth and sixth pipelines to achieve simultaneous flushing of the high and low pressure pipelines. After the flushing is qualified, it is only necessary to close the valve on the fourth pipeline to cut off the connection between the high and low pressure oil circuits and meet the system working requirements. This method of achieving efficient pipeline flushing of high and low pressure lubrication systems by simply opening and closing valves saves labor, time and materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a state diagram of a high- and low-pressure lubrication station capable of directly performing pipeline flushing according to an embodiment of the present invention when it is operating normally;

[0012] Figure 2 This is a schematic diagram of a high- and low-pressure lubrication station capable of directly performing pipeline flushing according to an embodiment of the present invention. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0015] like Figures 1 to 2As shown, this embodiment discloses a high- and low-pressure lubrication station that can directly perform pipeline flushing, including an oil tank 1 (and its accessories), a filter 3, and a cooler 4. The oil tank 1 is connected to the filter 3 through a first pipeline 11 and a second pipeline 12 in parallel. A first low-pressure pump group 21 is provided on the first pipeline 11, and a second low-pressure pump group 22 is provided on the second pipeline 12. The filter 3 is connected to the cooler 4, and the output end of the cooler 4 is connected to a third pipeline 13, a fourth pipeline 14, a fifth pipeline and a sixth pipeline in parallel. The third pipeline 13 is connected to the low-pressure oil supply port (a normally open valve 10 is provided on the third pipeline 13), the fourth pipeline 14, the fifth pipeline and the sixth pipeline are connected to the high-pressure oil supply port, the fourth pipeline is provided with a normally closed valve 7, the fifth pipeline is provided with a first high-pressure pump group 61 and a normally open valve 52, and the sixth pipeline is provided with a second high-pressure pump group 62 and a normally open valve 51.

[0016] Preferably, the output end of the cooler 4 is connected to a seventh pipeline 15, which is connected to the fuel tank 1. A normally closed valve is provided on the seventh pipeline 15. By shutting down the first high-pressure pump assembly 61, the second high-pressure pump assembly 62, the first low-pressure pump assembly 21, and the second low-pressure pump assembly 22, and opening the normally closed valve on the seventh pipeline 15, the fuel tank 1 can be connected to the low-pressure fuel supply port.

[0017] The seventh pipeline is used for internal oil circulation in the fuel tank, filtering the oil within the tank to improve oil cleanliness. To achieve internal oil circulation, close valves 7, 51, 52, and 10, open the valve on the seventh pipeline 15, and start one low-pressure pump (one for use, one for backup).

[0018] Normally open ball valves are provided on the first pipeline 11 and the second pipeline 12 , and normally open valves are installed at the water supply port and the water outlet of the cooler 4 .

[0019] The main purpose of the high and low pressure lubrication station that can directly flush the pipeline provided in this embodiment is to achieve rapid flushing of the high and low pressure lubrication system. The implementation steps are as follows:

[0020] Step 1: If Figure 1 As shown, the normally closed valve 7 on the fourth pipeline 14 cuts off the connection between the high-pressure and low-pressure oil circuits. At this time, the high-pressure oil supply port can be supplied with oil by the first high-pressure pump group 61 or the second high-pressure pump group 62, and the low-pressure oil supply port can be supplied with oil by the first low-pressure pump group 21 or the second low-pressure pump group 22. This state is the state of the lubrication station when it leaves the factory or is working normally.

[0021] Step 2: If Figure 2As shown, when the lubrication station is needed for pipeline flushing, first open the normally closed valve 7, close valves 51 and 52, then start the first and second low-pressure pump groups. The flushing oil supplied by the first and second low-pressure pump groups passes through filter 3 and cooler 4 in sequence, with one route used for flushing the low-pressure oil supply pipeline and the other route passed through valve 7 for flushing the high-pressure oil supply pipeline. This cycle of flushing continues until the oil cleanliness level in the main pipeline meets the required level.

[0022] Step 3: After the flushing is completed, close valve 7 and open valves 51 and 52, that is, restore the state of the lubrication station to normal operation.

[0023] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A high and low pressure lubrication station that can directly flush pipelines, characterized in that: It includes a fuel tank, a filter, and a cooler. The fuel tank is connected to the filter through a first pipeline and a second pipeline in parallel. A low-pressure pump group is provided on the first pipeline and the second pipeline. The filter is connected to the cooler. The output end of the cooler is connected to a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline in parallel. The third pipeline is connected to the low-pressure oil supply port, the fourth pipeline, the fifth pipeline and the sixth pipeline are connected to the high-pressure oil supply port, a normally closed valve is provided on the fourth pipeline, a high-pressure pump group and a normally open valve are provided on the fifth pipeline, and a high-pressure pump group and a normally open valve are provided on the sixth pipeline.

2. The high and low pressure lubrication station capable of directly flushing pipelines according to claim 1 is characterized in that: The output end of the cooler is connected to a seventh pipeline, the seventh pipeline is connected to the oil tank, and a normally closed valve is provided on the seventh pipeline.

3. The high and low pressure lubrication station capable of directly flushing pipelines according to claim 2 is characterized in that: Normally open ball valves are provided on the first pipeline and the second pipeline, and normally open valves are installed at the water supply port and the water outlet of the cooler.

Images