A front high-pressure filter device for a furnace roof hydraulic station

Abstract

The utility model relates to blast furnace hydraulic system technical field discloses a kind of front high-pressure filter device of blast furnace top hydraulic station, including hydraulic station main body, high-pressure oil pump and hydraulic valve group, the high-pressure oil pump is set to the lower part of hydraulic station main body, hydraulic valve group is set to the upper middle part of hydraulic station main body, further include high-pressure filter, the import of high-pressure filter is communicated with the export of high-pressure oil pump by high-pressure pipeline, the export of high-pressure filter is communicated with the import of hydraulic valve group by high-pressure pipeline, so that high-pressure filter is connected in series on the high-pressure oil circuit between high-pressure oil pump and hydraulic valve group, by adding fine filter in high-pressure oil pump export, can effectively intercept impurity, directly protect downstream expensive hydraulic valve and actuating mechanism, reduce the failure rate due to oil pollution, prolong equipment life, make full use of the old equipment of high-pressure filter available on site, reduce the transformation cost, the device construction difficulty is low, and the influence of refitting to production is very small.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace hydraulic systems, specifically to a pre-positioned high-pressure filter device for a blast furnace top hydraulic station. Background Technology

[0002] The blast furnace top hydraulic station is the core power unit ensuring the normal operation of the blast furnace top equipment, and its system working pressure is typically as high as 12-13 MPa. Currently, most existing blast furnace top hydraulic station designs only have return oil filters installed on the system's return oil path, while lacking effective filtration protection on the high-pressure oil path. High-pressure oil is directly pumped to various actuators, such as hydraulic cylinders, hydraulic motors, and precision servo valves and proportional valves.

[0003] Under high pressure, tiny impurity particles in the oil possess higher kinetic energy, causing severe erosion and wear on precision components such as valve cores and seals. This leads to malfunctions such as valve core jamming, increased internal leakage, and seal failure. These problems not only result in high maintenance costs but can also cause unplanned blast furnace shutdowns, resulting in significant economic losses. Summary of the Invention

[0004] Therefore, the purpose of this utility model is to provide a pre-positioned high-pressure filter device for the furnace top hydraulic station, which can effectively solve the problems mentioned in the background art.

[0005] This utility model adopts the following technical solution: a pre-positioned high-pressure filter device for a furnace top hydraulic station, comprising a hydraulic station body, a high-pressure oil pump, and a hydraulic valve group. The high-pressure oil pump is located at the lower part of the hydraulic station body, and the hydraulic valve group is located at the upper middle part of the hydraulic station body. It also includes a high-pressure filter. The inlet of the high-pressure filter is connected to the outlet of the high-pressure oil pump through a high-pressure pipeline, and the outlet of the high-pressure filter is connected to the inlet of the hydraulic valve group through a high-pressure pipeline, so that the high-pressure filter is connected in series in the high-pressure oil line between the high-pressure oil pump and the hydraulic valve group.

[0006] There are two high-pressure filters, which are installed in parallel on the upper left and right sides of the hydraulic station body. The two high-pressure filters are connected to the two high-pressure oil pumps to form two sets of filtration circuits.

[0007] The high-pressure oil pump and the high-pressure filter form a filtration circuit that is either in use and on standby or in parallel operation.

[0008] The high-pressure filter has a vertical cylindrical structure and a filtration accuracy greater than 10μm.

[0009] The rated working pressure of the high-pressure pipeline connecting the high-pressure oil pump, high-pressure filter and hydraulic valve group is greater than 16MPa.

[0010] It also includes a dedicated base for fixing the high-pressure filter, which is fixedly connected to the main body of the hydraulic station.

[0011] The high-pressure filter is equipped with a differential pressure transmitter or a blockage indicator.

[0012] Compared with the prior art, the advantages of this utility model are as follows: by adding a fine filter at the outlet of the high-pressure oil pump, impurities can be effectively intercepted, directly protecting the expensive downstream hydraulic valves and actuators, reducing the failure rate caused by oil contamination, extending equipment life, making full use of the existing high-pressure filter equipment available on site, reducing the modification cost, avoiding the replacement of the entire hydraulic station, and the device has low construction difficulty and minimal impact on production. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a system schematic diagram of the present invention; In the diagram: 1. High-pressure filter; 2. Main body of hydraulic station; 3. Hydraulic valve group; 4. High-pressure oil pump. Detailed Implementation

[0014] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0015] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0016] Please see Figure 1 , Figure 2 As shown, a pre-positioned high-pressure filter device for a furnace top hydraulic station includes a hydraulic station body 2, a high-pressure oil pump 4, and a hydraulic valve group 3. The high-pressure oil pump 4 is located at the lower part of the hydraulic station body 2, and the hydraulic valve group 3 is located at the upper middle part of the hydraulic station body 2. The device is characterized by further including a high-pressure filter 1. The inlet of the high-pressure filter 1 is connected to the outlet of the high-pressure oil pump 4 through a high-pressure pipeline, and the outlet of the high-pressure filter 1 is connected to the inlet of the hydraulic valve group 3 through a high-pressure pipeline, so that the high-pressure filter 1 is connected in series in the high-pressure oil line between the high-pressure oil pump 4 and the hydraulic valve group 3.

[0017] There are two high-pressure filters 1, which are installed in parallel on the upper left and right sides of the hydraulic station body 2. The two high-pressure filters 1 are connected to the two high-pressure oil pumps 4 to form two sets of filtration circuits.

[0018] The high-pressure oil pump 4 and the high-pressure filter 1 form a filtration circuit that is either in use and on standby or connected in parallel.

[0019] The high-pressure filter 1 has a vertical cylindrical structure and a filtration accuracy greater than 10μm.

[0020] The rated working pressure of the high-pressure pipeline connecting the high-pressure oil pump 4, the high-pressure filter 1, and the hydraulic valve group 3 is greater than 16MPa.

[0021] It also includes a special base for fixing the high pressure filter 1, which is fixedly connected to the hydraulic station body 2.

[0022] The high-pressure filter 1 is equipped with a differential pressure transmitter or a blockage indicator.

[0023] One embodiment of this utility model: This device uses an idle QUI-H16020BDP type high-pressure filter 1, completely disassembles it, and uses an ultrasonic cleaner to thoroughly clean the filter shell and internal parts to remove all oil and dirt. A brand new filter element with a filtration accuracy of 20μm, filter element model QUI-H160x20, is replaced, and all seals are replaced. Subsequently, a 21MPa pressure resistance test is performed on the assembled filter shell. After holding the pressure for 5 minutes, there is no leakage or deformation, confirming that its safety is far higher than the system working pressure.

[0024] After on-site inspection, technicians determined that there was a straight section of pipe with ample space on the DN32 main pipeline between the outlet of high-pressure oil pump 4 and hydraulic valve group 3, which could be used as an installation point. At the selected location on the main pipeline, four 90° DN32 carbon steel elbows were precisely cut and welded to form a new U-shaped branch pipeline. The interface size of the branch pipeline was matched with the flange interface of the high-pressure hose to be used. According to the flange installation dimensions of high-pressure filter 1, a special fixing base was made of L50×50 angle steel. The special fixing base was welded to the sturdy base of the hydraulic station body 2. Then, the high-pressure filter 1 was hoisted onto the base and bolted to ensure that it was installed firmly and could resist the vibration during equipment operation.

[0025] Two high-pressure hoses with a pressure rating of 16MPa and matching flanges are used. One hose connects the outlet of the welded elbow of the main pipeline to the inlet of high-pressure filter 1, and the other hose connects the outlet of high-pressure filter 1 to the inlet of the welded elbow of the main pipeline. All flange connections are secured with high-strength bolts to ensure no risk of leakage.

[0026] After the modification was completed, all actuators were placed in a depressurized state, and high-pressure oil pump 4 was started to circulate hydraulic oil in the system for a 48-hour load flushing. During the flushing process, oil samples were taken from the oil tank sampling port every 12 hours, and the cleanliness was tested using a particle counter. When the results of two consecutive tests both met the NAS level 8 standard, the flushing was stopped, the normal system connection was restored, the system pressure was adjusted to the working pressure of 13MPa, and the furnace top equipment was started for simulated operation. The differential pressure transmitter built into the high-pressure filter 1 was closely observed. The equipment operated stably, and the initial value of the filter differential pressure was 0.08MPa, which was within the normal range.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pre-positioned high-pressure filter device for a furnace top hydraulic station, comprising a hydraulic station body (2), a high-pressure oil pump (4), and a hydraulic valve group (3), wherein the high-pressure oil pump (4) is located at the lower part of the hydraulic station body (2), and the hydraulic valve group (3) is located at the upper middle part of the hydraulic station body (2), characterized in that: It also includes a high-pressure filter (1) and a special base for fixing the high-pressure filter (1). The special base is fixedly connected to the main body (2) of the hydraulic station. There are two high-pressure filters (1), which are set in parallel on the left and right sides of the upper part of the main body (2) of the hydraulic station. The two high-pressure filters (1) are connected to the two high-pressure oil pumps (4) to form two sets of filter circuits. The inlet of the high-pressure filter (1) is connected to the outlet of the high-pressure oil pump (4) through a high-pressure pipeline. The outlet of the high-pressure filter (1) is connected to the inlet of the hydraulic valve group (3) through a high-pressure pipeline, so that the high-pressure filter (1) is connected in series in the high-pressure oil line between the high-pressure oil pump (4) and the hydraulic valve group (3).

2. The pre-positioned high-pressure filter device for a furnace top hydraulic station according to claim 1, characterized in that: The two filter circuits formed by the high-pressure oil pump (4) and the high-pressure filter (1) are either in use and standby or operate in parallel.

3. The pre-positioned high-pressure filter device for the furnace top hydraulic station according to claim 1, characterized in that: The high-pressure filter (1) has a vertical cylindrical structure and a filtration accuracy greater than 10μm.

4. The pre-positioned high-pressure filter device for the furnace top hydraulic station according to claim 1, characterized in that: The rated working pressure of the high-pressure pipeline connecting the high-pressure oil pump (4), the high-pressure filter (1) and the hydraulic valve group (3) is greater than 16MPa.

5. A pre-positioned high-pressure filter device for a furnace top hydraulic station according to any one of claims 1 to 4, characterized in that: The high-pressure filter (1) is equipped with a differential pressure transmitter or a blockage indicator.

6. The pre-positioned high-pressure filter device for the furnace top hydraulic station according to claim 1, characterized in that: The high-pressure pipeline includes a U-shaped side branch pipeline formed by cutting and welding elbows on the original high-pressure main pipeline of the hydraulic station body (2). The inlet and outlet of the high-pressure filter (1) are connected to the two ends of the U-shaped side branch pipeline through high-pressure hoses and flanges, respectively. The special base is made of angle steel and welded and fixed on the base of the hydraulic station body (2).

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