Self-cleaning filter cylinder

Abstract

A self-cleaning filter cylinder. It primarily addresses the problem that existing filter cylinders require disassembly for cleaning the filter screen. It includes a cylinder body containing a filter plate (13), and a filter cylinder cover (5) fixed to the upper part of the cylinder body. The filter cylinder cover (5) is characterized by a valve body (17) connected to it, a lead screw (2) connected to it, and a push plate scraper (6) connected to the lower end of the lead screw (2) via a rotating nut (16). The push plate scraper (6) contacts the surface of the filter plate (13). This self-cleaning filter cylinder allows for cleaning of the filter screen without disassembly, achieving anti-clogging and ensuring smooth crude oil collection and transportation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oilfield crude oil gathering and transportation, in particular to a self-cleaning filter cylinder. BACKGROUND

[0002] Filtering is a very important process in the crude oil gathering and transportation process. After the crude oil is separated and treated in a settling tank, it still contains a large amount of impurities. In order to avoid the blockage of the gathering and transportation pipeline, a filter cylinder is usually arranged before the centrifugal pump in the gathering and transportation process to filter out the impurities. The main component for filtering out impurities in the filter cylinder is a filter screen. Due to the high content of waxy components in the crude oil, wax blocks are easily precipitated and bonded with other impurities, and the filter screen of the filter cylinder is often clogged, which causes the crude oil to be unable to be output, and safety and environmental protection hazards such as damage to the mechanical seal of the centrifugal pump and leakage of the crude oil, which must be handled in time.

[0003] At present, the filter screen of the filter cylinder is mainly manually disassembled and cleaned. The disassembly and processing process is time-consuming and labor-intensive, which not only affects the efficiency of the crude oil gathering and transportation, but also has safety and environmental protection hazards, and does not meet the requirements of the existing safety operation standards and environmental protection management regulations. SUMMARY

[0004] In order to overcome the problem that the filter screen of the existing filter cylinder needs to be disassembled and cleaned, the present application provides a self-cleaning filter cylinder. The filter screen of the self-cleaning filter cylinder can be cleaned without disassembly, which achieves the purpose of preventing blockage and ensures the smoothness of the crude oil gathering and transportation.

[0005] The technical scheme of the present application is as follows: a self-cleaning filter cylinder, comprising a cylinder body, a filter plate arranged in the cylinder body, a filter cylinder gland fixed to the upper part of the cylinder body, a valve body connected to the filter cylinder gland, a lead screw connected to the valve body, a push plate scraping piece connected to the lower end of the lead screw through a rotating nut, and the push plate scraping piece being in contact with the surface of the filter plate.

[0006] An extrusion opening is formed in the bottom of the cylinder body, a blowdown line is arranged at the bottom of the cylinder body, and the extrusion opening is communicated with the blowdown line.

[0007] A spiral rod is arranged in the blowdown line, a control valve is connected to one end of the spiral rod, and a blowdown valve is arranged on the blowdown line at the other end of the spiral rod.

[0008] An inlet and an outlet are formed in the cylinder body, and an outlet valve is arranged at the outlet.

[0009] A working rod is fixed to the upper end of the push plate scraping piece, the working rod is fixed to the rotating nut at the upper end, and the lower end of the lead screw is movably connected to the rotating nut.

[0010] The rotating nut is internally provided with a cavity, the lower end of the lead screw is provided with a lead screw end head having a larger diameter than the lead screw, and the lead screw end head is located in the cavity of the rotating nut.

[0011] The diameter of the lead screw end is smaller than the inner diameter of the rotating nut cavity, and the thickness of the lead screw end is smaller than the height of the rotating nut cavity.

[0012] A handwheel is connected to the upper end of the lead screw, and the handwheel is located outside the valve body.

[0013] This invention offers the following advantages: By adopting the above-mentioned solution, rotating the lead screw drives the scraper blades of the pressure plate to move up and down, scraping off impurities from the filter plate and then pushing them out through the extrusion port into the drain pipe. This filter cylinder can be cleaned without disassembling the filter screen, making operation simple and convenient. The cleaning efficiency of the filter cylinder is improved, and debris can be discharged promptly, even larger debris. The operation is safe and environmentally friendly. During filter plate cleaning, the depth of the lead screw's downward pressure can determine the amount of impurities in the filter cylinder, thus preventing filter screen clogging and ensuring smooth crude oil collection and transportation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] In the diagram, 1-handwheel, 2-lead screw, 3-packing gland, 4-fastening screw, 5-filter cylinder gland, 6-push plate scraper, 7-outlet valve, 8-flange, 9-drain valve, 10-screw rod, 11-extrusion port, 12-control valve, 13-filter plate, 14-inlet, 15-working rod, 16-rotary nut, 17-valve body, 18-drain pipeline. Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Depend on Figure 1 As shown, a self-cleaning filter cylinder includes a cylinder body, a filter plate 13 with filter holes inside the cylinder body, and a filter cylinder cover 5 fixed to the upper part of the cylinder body. A valve body 17 is connected to the upper part of the filter cylinder cover 5 via fastening screws 4. A packing gland is located inside the valve body 17, and a packing gland cover 3 is located on the upper part of the packing gland for tightening and sealing the filter cylinder. A lead screw 2 is connected to the valve body 17, and a handwheel 1 is connected to the upper end of the lead screw 2. The handwheel 1 is located outside the valve body 17, and rotating the handwheel 1 can move the lead screw 2 up and down. The lower end of the lead screw 2 is connected to a working rod 15 via a rotating nut 16. A push plate scraper 6 is connected to the lower part of the working rod 15. The width of the push plate scraper 6 is not less than the width of the filter plate 13, and the push plate scraper 6 contacts the surface of the filter plate 13. Rotating the lead screw 2 can move the push plate scraper 6 downwards, thereby removing impurities from the surface of the filter plate 13. The push plate scraper 6 can be a scraper, a rolling brush, or a combination of a lower scraper and an upper rolling brush, which can better clean the filter plate 13.

[0018] To allow the rotating nut 16 to rotate relative to the lead screw 2, the rotating nut 16 has an internal cavity. The lower end of the lead screw 2 has a lead screw end with a diameter larger than that of the lead screw 2. The lead screw end is located within the cavity of the rotating nut 16, and the diameter of the lead screw end is smaller than the inner diameter of the cavity of the rotating nut 16, while the thickness of the lead screw end is smaller than the height of the cavity of the rotating nut 16. This allows the lead screw 2 and the rotating nut 16 to rotate relative to each other. Rotating the lead screw 2 will cause the push plate scraper 6 to move downwards via the rotating nut 16.

[0019] The cylinder body has a compression port 11 at its bottom, located at the bottom of the filter plate 13. A drain pipe 18 is provided at the bottom of the cylinder body, and the compression port 11 communicates with the drain pipe 18. A spiral rod 10 is installed inside the drain pipe 18. One end of the spiral rod 10 is connected to a control valve 12, and the other end of the spiral rod 10 is connected to a drain valve 9 on the drain pipe 18. After opening the drain valve 9, rotating the handle of the control valve 12 causes the control valve 12 to rotate, thus pushing impurities in the drain pipe 18 out through the drain valve 9.

[0020] The cylinder body has an inlet 14 and an outlet, and a flange 8 is provided at the outlet, with an outlet valve 7 on the flange 8.

[0021] During cleaning, rotating handwheel 1 moves screw 2 up and down, which in turn moves the push plate scraper 6 up and down. The push plate scraper 6 pushes impurities off the surface of filter plate 13 and further compresses them downwards, allowing them to enter the drain line 18 through the bottom compression port 11. Then, control valve 12 controls screw rod 10 to discharge the impurities from the drain line 18 through drain valve 9, achieving self-cleaning of the filter cylinder. This filter cylinder can be cleaned without disassembling the filter screen, making operation simple and convenient. The cleaning efficiency of the filter cylinder is improved, and debris can be discharged promptly, even larger debris. The operation is safe and environmentally friendly. During filter plate cleaning, the depth of screw compression can indicate the amount of impurities in the filter cylinder, preventing filter screen clogging and ensuring smooth crude oil collection and transportation.

Claims

1. A self-cleaning filter cylinder, comprising a cylinder body, a filter plate (13) disposed inside the cylinder body, and a filter cylinder cover (5) fixed to the upper part of the cylinder body, characterized in that: The filter cylinder cover (5) is connected to a valve body (17), and a lead screw (2) is connected to the valve body (17). The lower end of the lead screw (2) is connected to a push plate scraper (6) through a rotating nut (16). The push plate scraper (6) is in contact with the surface of the filter plate (13). The rotating nut (16) has a cavity inside, and the lower end of the lead screw (2) has a lead screw end with a diameter larger than that of the lead screw (2). The lead screw end is located inside the cavity of the rotating nut (16). The diameter of the lead screw end is smaller than the inner diameter of the cavity of the rotating nut (16), and the thickness of the lead screw end is smaller than the height of the cavity of the rotating nut (16). The cylinder body has a compression port (11) at the bottom and a drain pipe (18) at the bottom, and the compression port (11) is connected to the drain pipe (18); The upper end of the push plate scraper (6) is fixed with a working rod (15), the upper end of the working rod (15) is fixed on the rotating nut (16), and the lower end of the lead screw (2) is movably connected to the rotating nut (16). During the cleaning operation, the lead screw (2) moves up and down, thereby driving the push plate scraper (6) to move up and down. The push plate scraper (6) pushes down the impurities on the surface of the filter plate (13) and continues to squeeze the pushed-down impurities downward. When cleaning the filter plate (13), the amount of impurities in the filter cylinder is judged according to the depth of the lead screw (2).

2. The self-cleaning filter cylinder according to claim 1, characterized in that: The sewage pipeline (18) is equipped with a screw rod (10) inside. One end of the screw rod (10) is connected to a control valve (12), and the other end of the sewage pipeline (18) is equipped with a sewage valve (9).

3. The self-cleaning filter tank according to claim 2, characterized in that: The cylinder body has an inlet (14) and an outlet, and an outlet valve (7) is provided at the outlet.

4. The self-cleaning filter cylinder according to claim 3, characterized in that: The upper end of the lead screw (2) is connected to a handwheel (1), and the handwheel (1) is located outside the valve body (17).

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