Filtering device for petrochemical production process

Abstract

The utility model discloses a petrochemical production process filtering device which comprises a cylinder with an opening in the upper end, a through hole horizontally penetrating left and right is formed in the outer edge face of the cylinder, the left end of the through hole is communicated with an oil inlet pipe, the right end of the through hole is communicated with an oil outlet pipe, and a filter cartridge sliding up and down on the inner edge face of the cylinder is arranged in the cylinder. A left-right through round hole is formed in the filter cartridge, a first filter screen is arranged at the right end of the round hole, and when the filter cartridge moves up and down to enable the round hole to be communicated with the through hole, oil in the oil inlet pipe flows into the oil outlet pipe through the through hole and the round hole and is filtered at the first filter screen; a pushing device is arranged on the upper end surface of the filter cylinder and enables the filter cylinder to slide downwards or upwards along the cylinder and then to be fixed; a replacement device is arranged on the lower portion of the filter cylinder, when the filter cylinder slides upwards, the replacement device slides upwards along the lower end face of the filter cylinder to the position of the through hole to be fixed, oil liquid at the oil inlet pipe is filtered by the replacement device and then discharged from the oil outlet pipe, and the problem that conveying of oil liquid in a pipeline needs to be stopped when a filter screen of a pipeline filter is replaced during petrochemical industry production is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of petrochemical production, and particularly relates to a filtering device for petrochemical production processes. Background Art

[0002] In the process of petrochemical production, when it is necessary to remove solid impurities, broken rocks and gravels from crude oil and refined oil, a pipeline filtering device is required. The pipeline filtering device is usually installed at the wellhead, pumping station, oil production station, etc. to ensure the quality of petroleum and the safety of production equipment. In the prior art, when the pipeline filtering device filters oil, the oil in the conveying pipeline must be suspended. After waiting for the remaining oil in the petrochemical production pipeline to flow out, the top cover is opened to regularly clean the solid impurities collected by the filter screen of the pipeline filtering device. Otherwise, the accumulation of solid impurities is likely to block the inside of the filter screen, causing the oil to stop flowing. Since multiple production devices need to be used in combination in the petrochemical production process, once the oil in the conveying pipeline stops flowing, it will affect the production of subsequent production devices, and the time wasted waiting for the remaining oil in the petrochemical production pipeline to flow out will increase the time of the overall petrochemical production process and affect the production efficiency of petrochemicals. Content of the Utility Model

[0003] The purpose of the utility model is to provide a filtering device for petrochemical production processes to solve the problem that the oil in the conveying pipeline needs to be stopped when replacing the filter screen of the pipeline filter during petrochemical production.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A filtering device for petrochemical production processes includes a cylinder with an open upper end. A through hole horizontally penetrating from left to right is provided on the outer edge surface of the cylinder. The left end of the through hole is communicated with an oil inlet pipe, and the right end of the through hole is communicated with an oil outlet pipe. A filter cylinder that slides up and down on the inner edge surface is provided inside the cylinder. A circular hole penetrating from left to right is opened on the filter cylinder. A first filter screen is provided at the right end of the circular hole. When the circular hole communicates with the through hole by the up and down movement of the filter cylinder, the oil from the oil inlet pipe flows into the oil outlet pipe through the through hole and the circular hole and is filtered at the first filter screen. A pushing device is provided on the upper end surface of the filter cylinder. The pushing device makes the filter cylinder slide down or up along the cylinder and then fixes it. A replacement device is provided at the lower part of the filter cylinder. When the filter cylinder slides up, the replacement device slides up along the lower end surface of the filter cylinder to the through hole and fixes it. The oil at the oil inlet pipe is filtered by the replacement device and then discharged from the oil outlet pipe.

[0006] As a further description of the above technical solution:

[0007] The described driving device includes a ring. The lower end face of the ring is fixed to the upper end face of the cylinder. The inner edge surface of the ring and the inner edge surface of the cylinder are coaxial and have the same diameter. A flange is fixed to the upper end face of the ring. The flange and the ring are coaxial. A threaded hole is opened at the axis center of the flange. A screw rod is rotatably arranged in the threaded hole. The upper end of the screw rod is placed above the flange. A central groove is opened at the center of the upper end face of the filter cartridge. The lower end of the screw rod is placed in the central groove and rotates therein.

[0008] As a further description of the above technical solution:

[0009] The described replacement device includes a round plug. A horizontally penetrating filter hole is opened on the outer edge surface of the round plug. The vertical cross-section of the filter hole is square. A second filter screen is fixed to the left end of the filter hole. The shape of the second filter screen is the same as that of the filter hole. A compression spring is arranged at the lower part of the round plug. One end of the compression spring is fixed to the lower end face of the round plug, and the other end of the compression spring is fixed to the inner bottom surface of the cylinder.

[0010] As a further description of the above technical solution:

[0011] Two centrally symmetric first sliding rods are fixed to the outer edge surface of the round plug in the front-back direction. The cross-section of the first sliding rod is rectangular. First sliding grooves corresponding to the corresponding first sliding rods are respectively opened on the inner edge surface of the cylinder in the front-back direction. The first sliding rods on the same side are placed in the corresponding first sliding grooves and slide up and down. The upper end of the first sliding groove is placed above the through hole. When the upper end face of the round plug moves to the upper end of the first sliding groove, the filter hole communicates with the through hole. When the lower end face of the round plug moves to the lower end of the first sliding groove, the axis of the round hole coincides with the axis of the through hole.

[0012] Two centrally symmetric second sliding rods are fixed to the outer edge surface of the filter cartridge. The cross-section of the second sliding rod is rectangular. The height of the second sliding rod is less than that of the first sliding rod. The two second sliding rods and the first sliding rods are in the same plane. Two second sliding grooves corresponding to the positions of the second sliding rods are opened on the inner edge surface of the cylinder in the front-back direction. The height of the second sliding groove is less than that of the first sliding groove. The second sliding groove communicates with the first sliding groove and the connection part is stepped. The upper end of the second sliding groove communicates with the upper end of the cylinder.

[0013] As a further description of the above technical solution:

[0014] A horizontal sunk groove is opened on the lower side of the right end of the oil inlet pipe. The right end of the sunk groove communicates with the inside of the cylinder. A push rod is slidably arranged in the sunk groove from left to right. The right end of the push rod is hemispherical and is placed inside the cylinder. A compression spring is fixed to the left end of the push rod. The other end of the compression spring is fixed to the bottom surface of the sunk groove.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are:

[0016] (1) In the present utility model, a first filter screen and a second filter screen are arranged inside a cylinder. During daily use, the first filter screen filters the oil fluid and the filter cylinder collects solid impurities. When it is necessary to clean the solid impurities in the filter cylinder, the filter cylinder is slid upward along the inner edge surface of the cylinder, so that the upper end of the round plug simultaneously slides upward along with the filter cylinder, and the upper end of the round plug blocks the upper end of the oil inlet pipe, and the oil fluid is filtered by the second filter screen, solving the problem that when taking out the filter cylinder to clean the solid impurities, it is necessary to suspend the oil fluid transportation in the oil inlet pipe and wait for the remaining oil fluid in the production pipeline to flow out after suspension, achieving the effect of reducing the impact on subsequent production equipment and reducing the maintenance cost during the cleaning process of the filter cylinder, shortening the time of the overall production link of petrochemical industry, and improving the production efficiency of petrochemical industry;

[0017] (2) In the present utility model, when the first sliding rod slides to the upper end of the first sliding groove, the oil fluid is filtered by the second filter screen, and when the second sliding rod slides along the second sliding groove to the lowermost end, the oil fluid is filtered by the first filter screen. When the worker disassembles and cleans the filter cylinder, the worker only needs to rotate the screw upward in one direction to remove the filter cylinder, and the second filter screen filters the oil fluid. When the worker fixes and installs the filter cylinder after cleaning, the worker only needs to rotate the screw downward in one direction during the operation, and then the first filter screen filters the oil fluid. By simply rotating the screw, the effect of simple operation is achieved, reducing the operation difficulty of the worker when cleaning the filter cylinder, and enabling the worker to quickly take out the filter cylinder for operation and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structure diagram of the present utility model;

[0019] Figure 2 is the front view of the present utility model;

[0020] Figure 3 is Figure 2 the front view cross-sectional view in

[0021] Figure 4 is the top view of the present utility model;

[0022] Figure 5 is Figure 4 the cross-sectional view at A-A in

[0023] Figure 6 is the partial cross-sectional three-dimensional view of the present utility model;

[0024] Figure 7 is the three-dimensional view of the second sliding rod 17 and the first filter screen 7 fixed on the filter cylinder 5. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figure 1-7 , the present utility model provides a technical solution for a filtering device in a petrochemical production process:

[0027] A filtering device for a petrochemical production process includes a cylinder 1 with an open upper end. A through hole 2 horizontally penetrating from left to right is provided on the outer edge surface of the cylinder 1. A fuel inlet pipe 3 is connected to the left end of the through hole 2, and a fuel outlet pipe 4 is connected to the right end of the through hole 2. A filter cartridge 5 that slides up and down on the inner edge surface is provided inside the cylinder 1. A circular hole 6 penetrating from left to right is opened on the filter cartridge 5. A first filter screen 7 is provided at the right end of the circular hole 6. When the filter cartridge 5 moves up and down to make the circular hole 6 communicate with the through hole 2, the oil liquid in the fuel inlet pipe 3 flows into the fuel outlet pipe 4 through the through hole 2 and the circular hole 6 and is filtered at the first filter screen 7. A pushing device is provided on the upper end surface of the filter cartridge 5, and the pushing device makes the filter cartridge 5 slide down or up along the cylinder 1 and then be fixed. A replacement device is provided at the lower part of the filter cartridge 5. When the filter cartridge 5 slides up, the replacement device slides up along the lower end surface of the filter cartridge 5 to the through hole 2 and is fixed. The oil liquid at the fuel inlet pipe 3 is filtered by the replacement device and then discharged from the fuel outlet pipe 4.

[0028] The described pushing device includes a ring 8. The lower end surface of the ring 8 is fixed to the upper end surface of the cylinder 1. The inner edge surface of the ring 8 and the inner edge surface of the cylinder 1 are coaxial and have the same diameter. A flange 9 is fixed to the upper end surface of the ring 8. The flange 9 and the ring 8 are coaxial. A threaded hole is opened at the center of the flange 9. A screw 10 is rotatably provided in the threaded hole. The upper end of the screw 10 is located above the flange 9. A central groove 11 is opened at the center of the upper end surface of the filter cartridge 5, and the lower end of the screw 10 is rotatably placed in the central groove 11.

[0029] The described replacement device includes a round plug 12. A horizontally penetrating filtering hole 13 is opened on the outer edge surface of the round plug 12. The vertical cross-section of the filtering hole 13 is square. A second filter screen 14 is fixed to the left end of the filtering hole 13. The shape of the second filter screen 14 is the same as the shape of the filtering hole 13. A compression spring is provided at the lower part of the round plug 12. One end of the compression spring is fixed to the lower end surface of the round plug 12, and the other end of the compression spring is fixed to the inner bottom surface of the cylinder 1.

[0030] On the outer edge surface of the circular plug 12, two centrally symmetric first sliding rods 15 are fixedly arranged in the front and rear directions. The cross-section of the first sliding rod 15 is rectangular. On the inner edge surface of the cylinder 1, first sliding grooves 16 corresponding to the first sliding rods 15 on the corresponding side are respectively opened in the front and rear directions. The first sliding rods 15 on the same side are placed in the corresponding first sliding grooves 16 and slide up and down. The upper ends of the first sliding grooves 16 are located on the upper side of the through holes 2. When the upper end surface of the circular plug 12 moves to the upper end of the first sliding groove 16, the filtering holes 13 communicate with the through holes 2. When the lower end surface of the circular plug 12 moves to the lower end of the first sliding groove 16, the axis of the circular hole 6 coincides with the axis of the through hole 2;

[0031] On the outer edge surface of the filter cartridge 5, two centrally symmetric second sliding rods 17 are fixedly arranged. The cross-section of the second sliding rod 17 is rectangular. The height of the second sliding rod 17 is less than that of the first sliding rod 15. The two second sliding rods 17 and the first sliding rod 15 are located in the same plane. On the inner edge surface of the cylinder 1, two second sliding grooves 18 corresponding to the positions of the second sliding rods 17 are opened in the front and rear directions. The height of the second sliding groove 18 is less than that of the first sliding groove 16. The second sliding groove 18 communicates with the first sliding groove 16 and the communicating part is in a stepped shape. The upper end of the second sliding groove 18 communicates with the upper end of the cylinder 1.

[0032] On the lower side of the right end of the oil inlet pipe 3, a horizontal sunk groove 19 is opened. The right end of the sunk groove 19 communicates with the inside of the cylinder 1. A push rod 20 is slidably arranged in the left and right directions in the sunk groove 19. The right end of the push rod 20 is hemispherical and is placed in the cylinder 1. A compression spring is fixed to the left end of the push rod 20, and the other end of the compression spring is fixed to the bottom surface of the sunk groove 19.

[0033] Working principle:

[0034] The flange 9, screw rod 10, oil inlet pipe 3 and oil outlet pipe 4 used in the present utility model are all prior arts.

[0035] Before the present utility model is used, the filter cartridge 5 is placed into the cylinder 1, so that the second sliding rods 17 slide downward along the second sliding grooves 18. Then, the lower end of the screw rod 10 is placed into the central groove 11 on the upper end surface of the filter cartridge 5 through the threaded hole. After the flange 9 is fixed to the upper end surface of the ring 8, the screw rod 10 is rotated, so that the screw rod 10 pushes the filter cartridge 5 to slide downward in the cylinder 1. When the filter cartridge 5 slides downward, it squeezes the circular plug 12, so that the circular plug 12 slides downward against the action of the bottom compression spring. When the axis of the circular hole 6 of the filter cartridge 5 coincides with the axis of the through hole 2, the first sliding rod 15 slides to the lower end of the first sliding groove 16, and the circular plug 12 stops sliding downward and then stops rotating the screw rod 10. At this time, the filter cartridge 5 is in a fixed state;

[0036] The oil liquid flows into the cylinder 1 from the oil inlet pipe 3. The first filter screen 7 fixed to the circular hole 6 at the right end filters the solid impurities in the oil liquid. The filtered solid impurities will fall into and be collected at the bottom of the cavity of the filter cartridge 5. The filtered oil liquid flows out from the oil outlet pipe 4;

[0037] When it is necessary to regularly clean the solid impurities collected in the present utility model, rotate the screw rod 10 in the reverse direction to move the screw rod 10 upward. The compression spring pushes the piston to slide upward to move the filter cartridge 5 upward. When the axis of the circular hole 6 deviates from the axis of the through hole 2, the second filter screen 14 at the left end of the round plug 12 moves upward, and the oil fluid will be filtered by the second filter screen 14 and discharged through the oil outlet pipe 4 along the filtering holes 13. Although the communication area between the through hole 2 and the circular hole 6 becomes smaller due to the upward sliding of the filter cartridge 5, since the unblocked filtering holes 13 at the lower part rise to the through hole 2, the flow rate of the oil fluid flowing through the filtering holes 13 increases. Therefore, the oil fluid in the inlet pipe will not be blocked. During this process, the upper end of the first slide bar 15 stops sliding at the upper end of the first sliding groove 16, and the upper end surface of the round plug 12 is higher than the through hole 2 to prevent the oil fluid from entering the upper end of the cylinder 1. Then, open the flange 9 and clean the filter cartridge 5;

[0038] Put the cleaned filter cartridge 5 back into the cylinder 1 and slide it downward. When the cleaned filter cartridge 5 slides downward, it pushes the round plug 12 to slide downward. At this time, the right end of the ejector rod 20 slides inside and outside the filtering holes on the second filter screen 14. Due to the action of the compression spring at the left end of the ejector rod 20, the right end of the ejector rod 20 slides along the mesh surface of the second filter screen 14. During the process that the right end of the ejector rod 20 slides into and out of the filtering holes, the ejector rod 20 moves left and right continuously, and the right end of the ejector rod 20 generates intermittent impacts on the second filter screen 14, causing the mesh surface of the second filter screen 14 to vibrate, and the residual solid impurities on the mesh surface of the second filter screen 14 fall to the inlet pipe 3. When the axis of the circular hole 6 coincides with the axis of the through hole 2 again, due to the push of the oil fluid in the inlet pipe 3, the solid impurities filtered by the second filter screen 14 are pushed back into the filter cartridge 5 for collection. Repeat the above operations when it is necessary to regularly clean the solid impurities.

[0039] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art in the technical field of the present utility model, within the technical scope disclosed by the present utility model, according to the technical solution and inventive concept of the present utility model, any equivalent replacement or change should be covered within the protection scope of the present utility model.

Claims

1. A petrochemical production process filtering device, characterized in that: The invention comprises a cylinder (1) with an opening at the upper end, a through hole (2) penetrating horizontally from left to right being provided on the outer edge surface of the cylinder (1), an oil inlet pipe (3) being connected to the left end of the through hole (2), and an oil outlet pipe (4) being connected to the right end of the through hole (2), a filter cartridge (5) sliding up and down on the inner edge surface of the cylinder (1), a circular hole (6) penetrating from left to right being provided on the filter cartridge (5), a first filter screen (7) being provided at the right end of the circular hole (6), and the filter cartridge (5) moving up and down makes the circular hole (6) communicate with the through hole (2) When the filter cartridge (5) is slid upward, the oil in the oil inlet pipe (3) flows into the oil outlet pipe (4) through the through hole (2) and the circular hole (6) and is filtered at the first filter screen (7); a pushing device is provided on the upper end surface of the filter cartridge (5), and the pushing device causes the filter cartridge (5) to slide downward or upward along the cylinder (1) and then be fixed; a replacement device is provided at the lower part of the filter cartridge (5), and when the filter cartridge (5) slides upward, the replacement device slides upward along the lower end surface of the filter cartridge (5) to be fixed at the through hole (2), and the oil in the oil inlet pipe (3) is filtered by the replacement device and then discharged from the oil outlet pipe (4).

2. A petrochemical production process filtering device according to claim 1, characterized in that: The pushing device comprises a circular ring (8), the lower end face of the circular ring (8) is fixed to the upper end face of the cylinder (1), the inner edge face of the circular ring (8) and the inner edge face of the cylinder (1) are coaxial and have the same diameter, a flange (9) is fixed to the upper end face of the circular ring (8), the flange (9) and the circular ring (8) are coaxial, a threaded hole is opened at the axis of the flange (9), a screw (10) is rotatably arranged in the threaded hole, the upper end of the screw (10) is placed above the flange (9), a center groove (11) is opened at the center of the upper end face of the filter cartridge (5), and the lower end of the screw (10) is placed in the center groove (11) and rotates.

3. A petrochemical production process filtering device according to claim 1, characterized in that: The replacement device comprises a round plug (12), the outer edge surface of the round plug (12) is provided with a filter hole (13) which passes through horizontally from left to right, the vertical section of the filter hole (13) is square, a second filter screen (14) is fixed at the left end of the filter hole (13), and the shape of the second filter screen (14) is the same as that of the filter hole (13); a compression spring is provided at the lower part of the round plug (12), one end of the compression spring is fixed to the lower end surface of the round plug (12), and the other end of the compression spring is fixed to the inner bottom surface of the cylinder (1).

4. A petrochemical production process filtering device according to claim 3, characterized in that: Two first sliding rods (15) are fixed on the outer edge surface of the round plug (12) in the front-to-back direction, and the cross section of the first sliding rod (15) is rectangular. First sliding grooves (16) corresponding to the first sliding rods (15) on the corresponding side are respectively opened on the inner edge surface of the cylinder (1) in the front-to-back direction. The first sliding rods (15) on the same side are placed in the corresponding first sliding grooves (16) and slide up and down. The upper end of the first sliding groove (16) is placed on the upper side of the through hole (2). When the upper end surface of the round plug (12) moves to the upper end of the first sliding groove (16), the filter hole (13) is connected with the through hole (2). When the lower end surface of the round plug (12) moves to the lower end of the first sliding groove (16), the axis of the round hole (6) coincides with the axis of the through hole (2). Two centrally symmetrical second slide bars (17) are fixed on the outer edge surface of the filter cartridge (5); the cross section of the second slide bars (17) is rectangular; the height of the second slide bars (17) is smaller than that of the first slide bar (15); the two second slide bars (17) and the first slide bar (15) are located in the same plane; two second slide grooves (18) corresponding to the positions of the second slide bars (17) are opened on the inner edge surface of the cylinder (1) in the front-rear direction; the height of the second slide groove (18) is smaller than that of the first slide groove (16); the second slide groove (18) is connected to the first slide groove (16) and the connection point is stepped; the upper end of the second slide groove (18) is connected to the upper end of the cylinder (1).

5. A petrochemical production process filtering device according to claim 1, characterized in that: A horizontal groove (19) is formed on the lower side of the right end of the oil inlet pipe (3), the right end of the groove (19) is connected to the inside of the cylinder (1), a push rod (20) is provided in the groove (19) for sliding left and right, the right end of the push rod (20) is hemispherical and placed in the cylinder (1), a compression spring is fixed to the left end of the push rod (20), and the other end of the compression spring is fixed to the bottom surface of the groove (19).

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