A backwash valve for a petroleum pipeline

Abstract

The application discloses a petroleum conveying pipeline backwashing valve and relates to the technical field of valves.The petroleum conveying pipeline backwashing valve comprises a connecting pipe provided with threaded caps at two ends, a mounting box, a switching mechanism arranged on the mounting box and used for switching the filtering area of a filter plate, a circular plate slidingly connected to the mounting box, a first L-shaped plate fixedly connected to the sidewall of the circular plate, a second L-shaped plate fixedly connected to the side of the first L-shaped plate away from the connecting pipe, and a switching block fixedly connected to the side of the mounting plate close to the circular plate.The petroleum conveying pipeline backwashing valve is used for switching and cleaning the working area and the cleaning area of the filter plate, and the water inlet and the water outlet do not need to be closed and opened for multiple times, so that the metal fatigue and the water hammer effect generated in the process of closing and opening the water inlet and the water outlet for multiple times are avoided.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a backflushing valve for oil pipelines. Background Technology

[0002] A backflushing valve is a hydraulically controlled valve, mainly composed of manual ball valves, automatic ball valves, and manual three-way valves. Driven by pipeline system pressure, it can automatically switch between two-position and three-way positions to achieve automatic backflushing of filters. The backflushing valve can automatically filter out impurities, ensuring the purity of oil and making it cleaner. It also protects oil pipelines, preventing scaling and rupture.

[0003] A typical application of backwash valves is in automatic backwash filtration systems with at least two parallel filter units. During backwashing, clean water filtered by one filter unit serves as the flushing water for the other. Upon receiving a hydraulic signal from the controller, the backwash valve changes the flow direction: closing the inlet and opening the outlet, allowing clean water filtered by the other filter units to enter this unit for flushing, and discharging the flushing water through the outlet.

[0004] As can be seen from the above-described backwash valve operation process, the inlet and outlet need to be closed and opened multiple times during self-cleaning. On the one hand, this can easily cause metal fatigue and wear on the inlet and outlet switches during repeated closing and opening, thus reducing their service life. On the other hand, the sudden closure of the inlet will create pressure on the valve and pipe wall due to the smooth pipe wall. As a result, the subsequent water flow will quickly reach its maximum under the action of inertia, causing damage and forming a "water hammer effect". This will cause certain destructive force to the backwash valve, thus affecting its service life. Summary of the Invention

[0005] The purpose of this invention is to provide a backflushing valve for oil pipelines to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a backflushing valve for an oil pipeline, comprising a connecting pipe with threaded caps at both ends, an installation box fixedly connected to the side wall of the connecting pipe, an installation plate slidably connected inside the installation box, a filter plate for filtering oil on the installation plate, the length of the filter plate being twice the diameter of the connecting pipe, and a switching mechanism for switching the filter zone of the filter plate on the installation box;

[0007] The switching mechanism includes a circular plate slidably connected to the mounting box, a first L-shaped plate fixedly connected to the side wall of the circular plate, a second L-shaped plate fixedly connected to the side of the first L-shaped plate away from the connecting pipe, a switching block fixedly connected to the side of the mounting plate near the circular plate, an inclined surface opened on the side of the switching block near the second L-shaped plate, one end of the second L-shaped plate sliding on the inclined surface, and a driving mechanism for driving the second L-shaped plate on the connecting pipe.

[0008] Preferably, the driving mechanism includes a first fixing plate fixedly connected to the side wall of the connecting pipe, a fixing pipe fixedly connected to the other end of the first fixing plate, a second fixing plate fixedly connected to the side wall of the fixing pipe, a driving pipe fixedly connected to the side of the second fixing plate near the circular plate, a threaded rod threadedly connected to the driving pipe, a third fixing plate fixedly connected to the side wall of the circular plate, the threaded rod rotatably connected to the third fixing plate, and a rotating disk fixedly connected to one end of the threaded rod.

[0009] Preferably, the fixed tube is provided with a guide assembly for guiding the movement of the second L-shaped plate. The guide assembly includes a fourth fixed plate fixedly connected to the side wall of the fixed tube. The fourth fixed plate is symmetrically arranged with the second fixed plate. A guide tube is fixedly connected to the side of the fourth fixed plate near the circular plate. A guide rod is slidably connected to the guide tube. A fifth fixed plate is fixedly connected to the side wall of the circular plate. One end of the guide rod is connected to the fifth fixed plate.

[0010] Preferably, the fixed tube is provided with a cleaning mechanism for cleaning the filter plate. The cleaning mechanism includes a first cleaning tube and a second cleaning tube fixedly connected to the end of the fixed tube away from the circular plate. The side walls of the first cleaning tube and the second cleaning tube are respectively provided with control mechanisms. The mounting box is provided with a first cleaning box and a second cleaning box. The first cleaning box and the second cleaning box are respectively located on both sides of the connecting tube. The other ends of the first cleaning tube and the second cleaning tube are respectively connected to the first cleaning box and the second cleaning box. The first cleaning box and the second cleaning box have multiple air outlets on the side near the filter plate.

[0011] Preferably, two collection boxes are fixedly connected to the side wall of the connecting pipe, and two cleaning holes are opened on the side of the mounting box away from the first cleaning box, with the two collection boxes located below the two cleaning holes.

[0012] Preferably, the fixed tube is provided with a pushing mechanism for pushing gas into the first cleaning box and the second cleaning box. The pushing mechanism includes a push rod slidably connected to the inside of the fixed tube. Sixth fixed plates are fixedly connected to both sides of the push rod. The two sixth fixed plates are respectively sleeved on the side walls of the threaded rod and the guide rod. A first spring is sleeved on the side wall of the guide rod. The two ends of the first spring are respectively connected to the sixth fixed plate and the fifth fixed plate. First T-shaped rods are slidably connected to the two sixth fixed plates. One end of the two first T-shaped rods is respectively connected to the third fixed plate and the fifth fixed plate.

[0013] Preferably, the first L-shaped plate is provided with a step-by-step connection mechanism for the first cleaning tube and the second cleaning tube. The connection mechanism includes two connecting rods, one end of each connecting rod being connected to a control mechanism. A triangular block is fixedly connected to the side of the first L-shaped plate near the fixed tube. The two sides of the triangular block slide on the connecting rod connected to the first cleaning tube. The end of the switching block near the fixed tube is opposite to the other connecting rod.

[0014] Preferably, the fixed tube is provided with an air intake mechanism for external gas to enter. The air intake mechanism includes an air intake pipe fixedly connected to one end of the fixed tube near the mounting box. The air intake pipe is provided with a one-way valve, and the one-way valve is open from the outside to the inside of the fixed tube.

[0015] Preferably, the control mechanism includes a control box fixedly connected to the first cleaning tube, a control plate slidably connected inside the control box, a guide rod connected to the other side of the control plate, a control hole provided on the control plate, the control hole being matched with the inner diameter of the first cleaning tube, a connecting plate fixedly connected to one end of the control plate, two second T-shaped rods slidably connected to the connecting plate, a seventh fixing plate fixedly connected to two opposite side walls of the control box, the two second T-shaped rods sliding on the seventh fixing plate, and second springs sleeved on the side walls of the two second T-shaped rods, with the two ends of the two second springs respectively connected to the connecting plate and the seventh fixing plate.

[0016] Preferably, the mounting box is provided with a reset assembly for resetting the mounting plate. The reset assembly includes an eighth fixing plate fixedly connected to two opposite side walls of the mounting box. A third T-shaped rod is slidably connected to the two eighth fixing plates. A ninth fixing plate is fixedly connected to the two opposite side walls of the mounting plate. One end of the two third T-shaped rods is connected to the ninth fixing plate. A third spring is sleeved on the side wall of the two third T-shaped rods. The two ends of the two third springs are respectively connected to the eighth fixing plate and the ninth fixing plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) The backwash valve for oil pipelines, through the setting of the switching mechanism, can switch between the working area and the cleaning area of ​​the filter plate and clean it under the driving action of the driving mechanism. It does not require the inlet and outlet to be closed and opened multiple times, thereby avoiding metal fatigue and "water hammer effect" caused by the inlet and outlet switches being closed and opened multiple times, thus ensuring the normal service life of the backwash valve.

[0019] (2) The backwash valve for oil pipelines, through the setting of the guiding mechanism, distributes and guides the connection between the first cleaning pipe and the second cleaning pipe and the fixed pipe, thereby realizing the cleaning of the filter plate switching area and the working area in sequence. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the filter plate in this invention;

[0022] Figure 3 This is a schematic diagram of the cleaning hole structure in this invention;

[0023] Figure 4 This is a schematic diagram of the switching mechanism in this invention;

[0024] Figure 5 This is a schematic diagram of the guide component in the present invention;

[0025] Figure 6 This is a schematic diagram of the cleaning mechanism in this invention;

[0026] Figure 7 for Figure 6 Enlarged structural diagram at point A;

[0027] Figure 8 This is a schematic diagram of the control mechanism in this invention.

[0028] In the diagram: 101. Threaded cap; 102. Connecting pipe; 103. Mounting box; 104. Mounting plate; 105. Filter plate; 2. Switching mechanism; 201. Circular plate; 202. First L-shaped plate; 203. Second L-shaped plate; 204. Switching block; 205. Inclined surface; 3. Drive mechanism; 301. First fixing plate; 302. Fixing pipe; 303. Second fixing plate; 304. Drive pipe; 305. Threaded rod; 306. Third fixing plate; 307. Rotating disk; 4. Guide assembly; 401. Fourth fixing plate; 402. Guide pipe; 403. Guide rod; 404. Fifth fixing plate; 5. Cleaning mechanism; 501. First cleaning pipe; 502. Second cleaning pipe; 503. First cleaning... 504. Second cleaning box; 505. Collection box; 506. Cleaning hole; 6. Push-in mechanism; 601. Push rod; 602. Sixth fixing plate; 603. First spring; 604. First T-shaped rod; 7. Conducting mechanism; 701. Conducting rod; 702. Triangular block; 8. Air intake mechanism; 801. Air intake pipe; 802. One-way valve; 9. Control mechanism; 901. Control box; 902. Control plate; 903. Control hole; 904. Seventh fixing plate; 905. Second T-shaped rod; 906. Second spring; 907. Connecting plate; 10. Reset assembly; 1001. Ninth fixing plate; 1002. Third T-shaped rod; 1003. Third spring; 1004. Eighth fixing plate. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The present invention provides a technical solution: a backflushing valve for an oil pipeline, including a connecting pipe 102 with threaded caps 101 connected to both ends, an installation box 103 fixedly connected to the side wall of the connecting pipe 102, an installation plate 104 slidably connected inside the installation box 103, a filter plate 105 for filtering oil on the installation plate 104, the length of the filter plate 105 being twice the diameter of the connecting pipe 102, and a switching mechanism 2 for switching the filter zone of the filter plate 105 on the installation box 103;

[0031] Please see Figure 1-6The switching mechanism 2 includes a circular plate 201 slidably connected to the mounting box 103. A first L-shaped plate 202 is fixedly connected to the side wall of the circular plate 201. A second L-shaped plate 203 is fixedly connected to the side of the first L-shaped plate 202 away from the connecting pipe 102. A switching block 204 is fixedly connected to the side of the mounting plate 104 near the circular plate 201. An inclined surface 205 is provided on the side of the switching block 204 near the second L-shaped plate 203. One end of the second L-shaped plate 203 slides on the inclined surface 205. A driving mechanism 3 for driving the second L-shaped plate 203 is provided on the connecting pipe 102.

[0032] It should be noted that by setting the switching mechanism 2, the working area and cleaning area of ​​the filter plate 105 can be switched and cleaned under the driving action of the driving mechanism 3. There is no need to repeatedly close and open the inlet and outlet, thereby avoiding metal fatigue and "water hammer effect" caused by repeated closing and opening of the inlet and outlet switches, thus ensuring the normal service life of the backwash valve.

[0033] Please see Figure 3-4 The drive mechanism 3 includes a first fixing plate 301 fixedly connected to the side wall of the connecting pipe 102, a fixing pipe 302 fixedly connected to the other end of the first fixing plate 301, a second fixing plate 303 fixedly connected to the side wall of the fixing pipe 302, a drive pipe 304 fixedly connected to the side of the second fixing plate 303 near the circular plate 201, a threaded rod 305 threadedly connected to the drive pipe 304, a third fixing plate 306 fixedly connected to the side wall of the circular plate 201, the threaded rod 305 rotatably connected to the third fixing plate 306, and a rotating disk 307 fixedly connected to one end of the threaded rod 305.

[0034] It should be noted here that the drive mechanism 3 facilitates the up-and-down movement of the second L-shaped plate 203.

[0035] Please see Figure 5 The fixed tube 302 is provided with a guide assembly 4 for guiding the movement of the second L-shaped plate 203. The guide assembly 4 includes a fourth fixed plate 401 fixedly connected to the side wall of the fixed tube 302. The fourth fixed plate 401 is symmetrically arranged with the second fixed plate 303. The guide tube 402 is fixedly connected to the side of the fourth fixed plate 401 near the circular plate 201. A guide rod 403 is slidably connected to the guide tube 402. A fifth fixed plate 404 is fixedly connected to the side wall of the circular plate 201. One end of the guide rod 403 is connected to the fifth fixed plate 404.

[0036] It should be noted here that the movement of the second L-shaped plate 203 provides guidance and limiting functions through the setting of the guide component.

[0037] Please see Figure 2-4The fixed tube 302 is provided with a cleaning mechanism 5 for cleaning the filter plate 105. The cleaning mechanism 5 includes a first cleaning tube 501 and a second cleaning tube 502 fixedly connected to the end of the fixed tube 302 away from the circular plate 201. The side walls of the first cleaning tube 501 and the second cleaning tube 502 are respectively provided with control mechanisms 9. The mounting box 103 is provided with a first cleaning box 503 and a second cleaning box 504. The first cleaning box 503 and the second cleaning box 504 are respectively located on both sides of the connecting tube 102. The other ends of the first cleaning tube 501 and the second cleaning tube 502 are respectively connected to the first cleaning box 503 and the second cleaning box 504. The first cleaning box 503 and the second cleaning box 504 are provided with multiple air outlets on the side of the filter plate 105.

[0038] It should be noted here that the cleaning mechanism 5 facilitates the cleaning of the filter plate 105's switching area and working area.

[0039] Please see Figure 1-2 Two collection boxes 505 are fixedly connected to the side wall of the connecting pipe 102. Two cleaning holes 506 are opened on the side of the mounting box 103 away from the first cleaning box 503. The two collection boxes 505 are located below the two cleaning holes 506.

[0040] It should be noted here that the collection box 505 is designed to facilitate the collection of impurities cleaned from the filter plate 105.

[0041] Please see Figure 4 The fixed tube 302 is provided with a pushing mechanism 6 for pushing gas into the first cleaning box 503 and the second cleaning box 504. The pushing mechanism 6 includes a push rod 601 slidably connected to the fixed tube 302. Sixth fixing plates 602 are fixedly connected to both sides of the push rod 601. The two sixth fixing plates 602 are respectively sleeved on the side walls of the threaded rod 305 and the guide rod 403. A first spring 603 is sleeved on the side wall of the guide rod 403. The two ends of the first spring 603 are respectively connected to the sixth fixing plate 602 and the fifth fixing plate 404. A first T-shaped rod 604 is slidably connected to the two sixth fixing plates 602. One end of the two first T-shaped rods 604 is respectively connected to the third fixing plate 306 and the fifth fixing plate 404.

[0042] It should be noted here that the push-in mechanism 6 facilitates the compression of the gas inside the fixed tube 302.

[0043] Please see Figure 4The first L-shaped plate 202 is provided with a connecting mechanism 7 for step-by-step connecting of the first cleaning tube 501 and the second cleaning tube 502. The connecting mechanism 7 includes two connecting rods 701. One end of the two connecting rods 701 is connected to the control mechanism 9 respectively. A triangular block 702 is fixedly connected to the side of the first L-shaped plate 202 near the fixed tube 302. The two sides of the triangular block 702 slide on the connecting rod 701 connected to the first cleaning tube 501. The end of the switching block 204 near the fixed tube 302 is opposite to the other connecting rod 701.

[0044] It should be noted here that: through the setting of the guiding mechanism 7, the connection between the first cleaning pipe 501 and the second cleaning pipe 502 and the fixed pipe 302 is distributed and connected, thereby realizing the cleaning of the filter plate 105 to be switched area and working area in sequence.

[0045] Please see Figure 7 The fixed pipe 302 is provided with an air intake mechanism 8 for external gas to enter. The air intake mechanism 8 includes an air intake pipe 801 fixedly connected to one end of the fixed pipe 302 near the mounting box 103. The air intake pipe 801 is provided with a one-way valve 802. The conduction direction of the one-way valve 802 is from the outside to the inside of the fixed pipe 302.

[0046] It should be noted that, due to the design of the air intake mechanism, when the push rod 601 moves in the reverse direction, external air can enter the fixed pipe 302 from the air intake pipe 801, which facilitates the next cleaning of the filter plate 105.

[0047] Please see Figure 6-8 The control mechanism 9 includes a control box 901 fixedly connected to the first cleaning tube 501. A control plate 902 is slidably connected inside the control box 901. A guide rod 701 is connected to the other side of the control plate 902. A control hole 903 is provided on the control plate 902. The control hole 903 is matched with the inner diameter of the first cleaning tube 501. A connecting plate 907 is fixedly connected to one end of the control plate 902. Two second T-shaped rods 905 are slidably connected to the connecting plate 907. A seventh fixing plate 904 is fixedly connected to two opposite side walls of the control box 901. The two second T-shaped rods 905 slide on the seventh fixing plate 904. A second spring 906 is sleeved on the side wall of the two second T-shaped rods 905. The two ends of the two second springs 906 are respectively connected to the connecting plate 907 and the seventh fixing plate 904.

[0048] It should be noted here that the control mechanism 9 facilitates the connection between the first cleaning pipe 501 or the second cleaning pipe 502 and the fixed pipe 302.

[0049] Please see Figure 1-3The mounting box 103 is provided with a reset assembly 10 for resetting the mounting plate 104. The reset assembly 10 includes an eighth fixing plate 1004 fixedly connected to two opposite side walls of the mounting box 103. A third T-shaped rod 1002 is slidably connected to the two eighth fixing plates 1004. A ninth fixing plate 1001 is fixedly connected to the two opposite side walls of the mounting plate 104. One end of the two third T-shaped rods 1002 is connected to the ninth fixing plate 1001. A third spring 1003 is sleeved on the side wall of the two third T-shaped rods 1002. The two ends of the two third springs 1003 are respectively connected to the eighth fixing plate 1004 and the ninth fixing plate 1001.

[0050] It should be noted here that: by setting the reset component 10, when cleaning the filter plate 105 next time, rotating the rotating disk 307 in the opposite direction will drive the second L-shaped plate 203 to move away from the control mounting plate 104. At this time, under the elastic force of the third spring 1003, the filter plate 105 will switch the working area again.

[0051] Working principle: When it is necessary to clean the filter plate 105 in the connecting pipe 102, rotate the rotating disk 307 to drive the threaded rod 305 to rotate. Under the threaded meshing transmission action of the threaded rod 305 and the drive pipe 304 and the guiding action of the guide component 4, the first L-shaped plate 202 on one side of the circular plate 201 will be driven to move downward. During the downward movement of the first L-shaped plate 202, the second L-shaped plate 203 will be driven to move downward simultaneously. As the rotating disk 307 continues to rotate, when the second L-shaped plate 203 abuts against the switching block 204, under the interaction of the inclined surface 205, the mounting plate 104 will be pushed to retract into the mounting box 103. At this time, the filter plate 105 will be driven to slide simultaneously, thereby realizing the switching of the filter area of ​​the filter plate 105.

[0052] Furthermore, during the downward movement of the circular plate 201, the first spring 603 will be compressed. Under the elastic extrusion force of the first spring 603, the push rod 601 will be pushed to slide inside the fixed tube 302. During the sliding of the push rod 601 inside the fixed tube 302, the gas inside the fixed tube 302 will be squeezed into the first cleaning tube 501 and the second cleaning tube 502.

[0053] Furthermore, as the first L-shaped plate 202 moves downward, it will drive the triangular block 702 to move downward. When the triangular block 702 abuts against the guide rod 701, under the interaction force, the guide rod 701 will push the control plate 902 to retract into the control box 901. At this time, the control hole 903 on the control plate 902 will be connected to the first cleaning tube 501, so that the gas in the fixed tube 302 flows to the first cleaning box 503 and is finally sprayed onto the surface of the filter plate 105 to be switched, thereby ensuring the cleanliness of the surface of the filter plate 105 in the switching area.

[0054] As the first L-shaped plate 202 continues to move downwards, when the triangular block 702 passes the guide rod 701, under the elastic action of the second spring 906, the control hole 903 will be misaligned with the first cleaning pipe 501, thus blocking the first cleaning pipe 501. After the filter plate 105 is switched, the switching block 204 will abut against the guide rod 701 at the second cleaning pipe 502. At this time, under the control of the control mechanism 9, the connection between the second cleaning pipe 502 and the fixed pipe 302 will be connected, so that the gas in the fixed pipe 302 will be sprayed from the air outlet at the second cleaning box 504 onto the surface of the filter plate 105, thereby cleaning the switched-off filter plate 105. Through the setting of the switching mechanism, the working area and the cleaning area of ​​the filter plate 105 can be switched for use and cleaning, without the need to repeatedly close and open the inlet and outlet, thus avoiding metal fatigue and "water hammer effect" caused by repeated closing and opening of the inlet and outlet switches, thereby ensuring the normal service life of the backwash valve.

Claims

1. A backflushing valve for an oil pipeline, comprising a connecting pipe (102) with threaded caps (101) at both ends, a mounting box (103) fixedly connected to the side wall of the connecting pipe (102), a mounting plate (104) slidably connected inside the mounting box (103), and a filter plate (105) for filtering oil provided on the mounting plate (104), wherein the length of the filter plate (105) is twice the diameter of the connecting pipe (102), characterized in that: The mounting box (103) is provided with a switching mechanism (2) for switching the filter area of ​​the filter plate (105). The switching mechanism (2) includes a circular plate (201) slidably connected to the mounting box (103). A first L-shaped plate (202) is fixedly connected to the side wall of the circular plate (201). A second L-shaped plate (203) is fixedly connected to the side of the first L-shaped plate (202) away from the connecting pipe (102). A switching block (204) is fixedly connected to the side of the mounting plate (104) close to the circular plate (201). An inclined surface (205) is provided on the side of the switching block (204) close to the second L-shaped plate (203). One end of the second L-shaped plate (203) slides on the inclined surface (205). A driving mechanism (3) for driving the second L-shaped plate (203) is provided on the connecting pipe (102). The drive mechanism (3) includes a fixed tube (302), and the fixed tube (302) is provided with a cleaning mechanism (5) for cleaning the filter plate (105). The cleaning mechanism (5) includes a first cleaning tube (501) and a second cleaning tube (502) fixedly connected to the end of the fixed tube (302) away from the circular plate (201). The side walls of the first cleaning tube (501) and the second cleaning tube (502) are respectively provided with control mechanisms (9). The mounting box (103) is provided with a first cleaning box (503) and a second cleaning box (504). The first cleaning box (503) and the second cleaning box (504) are respectively located on both sides of the connecting tube (102). The other ends of the first cleaning tube (501) and the second cleaning tube (502) are respectively connected to the first cleaning box (503) and the second cleaning box (504). The first cleaning box (503) and the second cleaning box (504) are provided with multiple air outlets on the side of the filter plate (105) close to the filter plate (105). Two collection boxes (505) are fixedly connected to the side wall of the connecting pipe (102). Two cleaning holes (506) are opened on the side of the mounting box (103) away from the first cleaning box (503). The two collection boxes (505) are located below the two cleaning holes (506). The fixed tube (302) is provided with a pushing mechanism (6) for pushing gas into the first cleaning box (503) and the second cleaning box (504). The pushing mechanism (6) includes a push rod (601) slidably connected to the fixed tube (302). The first L-shaped plate (202) is provided with a connecting mechanism (7) for step-by-step connecting the first cleaning tube (501) and the second cleaning tube (502). The connecting mechanism (7) includes two connecting rods (701). One end of the two connecting rods (701) is connected to the control mechanism (9) respectively. A triangular block (702) is fixedly connected to the side of the first L-shaped plate (202) near the fixed tube (302). The two sides of the triangular block (702) slide on the connecting rod (701) connected to the first cleaning tube (501). The end of the switching block (204) near the fixed tube (302) is opposite to the other connecting rod (701). The fixed tube (302) is provided with an air intake mechanism (8) for external gas to enter, and the mounting box (103) is provided with a reset assembly (10) for resetting the mounting plate (104). The driving mechanism (3) drives the circular plate (201) to move closer to the mounting box (103) until the second L-shaped plate (203) abuts against the inclined surface (205) of the switching block (204), triggering the mounting plate (104) to drive the filter plate (105) to slide within the mounting box (103), thereby switching the filter area of ​​the filter plate (105); during the movement of the circular plate (201), the push rod (601) of the pushing mechanism (6) is simultaneously triggered to slide away from the air intake mechanism (8) within the fixed tube (302), thereby compressing the gas within the fixed tube (302); the first L When the template (202) moves with the circular plate (201) to the point where the triangular block (702) abuts against the guide rod (701) corresponding to the first cleaning tube (501), the guide rod (701) is triggered to push the control mechanism (9) to operate, so that the first cleaning tube (501) is connected to the fixed tube (302), and the compressed gas is sprayed through the air outlet of the first cleaning tube (501) and the first cleaning box (503) to the filter plate (105) waiting to be switched; the first L When the template (202) continues to move until the triangular block (702) passes the guide rod (701) corresponding to the first cleaning tube (501), the control mechanism (9) is triggered to reset and block the first cleaning tube (501); after the filter plate (105) completes the switching, the switching block (204) abuts against the guide rod (701) corresponding to the second cleaning tube (502), triggering the guide rod (701) to push the corresponding control mechanism (9) to act, so that the second cleaning tube (502) is connected to the fixed tube (302), and the compressed gas passes through the second cleaning tube (502) and the second cleaning tube. The air outlet of the box (504) sprays air onto the original filter area of ​​the filter plate (105) that has been switched, thereby cleaning the impurities. The cleaned impurities fall into the collection box (505) through the cleaning hole (506) to complete the collection. When the drive mechanism (3) drives the circular plate (201) to move away from the mounting box (103), it triggers the push mechanism (6) to reset. The push rod (601) slides towards the air intake mechanism (8), triggering the one-way valve (802) of the air intake mechanism (8) to open. External gas enters the fixed pipe (302) to complete the air replenishment. At the same time, the circular plate (201) drives the second L-shaped plate (203) to disengage from the switching block (204), triggering the reset component (10) to drive the mounting plate (104) and the filter plate (105) to reset, preparing for the next filter area switching and cleaning.

2. The backflushing valve for an oil pipeline according to claim 1, characterized in that: The driving mechanism (3) includes a first fixing plate (301) fixedly connected to the side wall of the connecting pipe (102), the fixing pipe (302) fixedly connected to the other end of the first fixing plate (301), a second fixing plate (303) fixedly connected to the side wall of the fixing pipe (302), a driving pipe (304) fixedly connected to the side of the second fixing plate (303) near the circular plate (201), a threaded rod (305) threadedly connected to the driving pipe (304), a third fixing plate (306) fixedly connected to the side wall of the circular plate (201), the threaded rod (305) rotatably connected to the third fixing plate (306), and a rotating disk (307) fixedly connected to one end of the threaded rod (305).

3. The backflushing valve for an oil pipeline according to claim 2, characterized in that: The fixed tube (302) is provided with a guide assembly (4) for guiding the movement of the second L-shaped plate (203). The guide assembly (4) includes a fourth fixed plate (401) fixedly connected to the side wall of the fixed tube (302). The fourth fixed plate (401) is symmetrically arranged with the second fixed plate (303). The guide tube (402) is fixedly connected to the side of the fourth fixed plate (401) near the circular plate (201). A guide rod (403) is slidably connected to the guide tube (402). A fifth fixed plate (404) is fixedly connected to the side wall of the circular plate (201). One end of the guide rod (403) is connected to the fifth fixed plate (404).

4. A backflushing valve for an oil pipeline according to claim 3, characterized in that: The push rod (601) is fixedly connected to the two sides of the sixth fixing plate (602). The two sixth fixing plates (602) are respectively sleeved on the side walls of the threaded rod (305) and the guide rod (403). The guide rod (403) is sleeved on the side wall. The two ends of the first spring (603) are respectively connected to the sixth fixing plate (602) and the fifth fixing plate (404). The two sixth fixing plates (602) are slidably connected to the first T-shaped rod (604). One end of the two first T-shaped rods (604) is respectively connected to the third fixing plate (306) and the fifth fixing plate (404).

5. A backflushing valve for an oil pipeline according to claim 4, characterized in that: The air intake mechanism (8) includes an air intake pipe (801) fixedly connected to one end of the fixed pipe (302) near the mounting box (103). The air intake pipe (801) is provided with a one-way valve (802), and the one-way valve (802) is directed from the outside to the inside of the fixed pipe (302).

6. A backflushing valve for an oil pipeline according to claim 1, characterized in that: The control mechanism (9) includes a control box (901) fixedly connected to the first cleaning tube (501), a control plate (902) slidably connected inside the control box (901), a guide rod (701) connected to the other side of the control plate (902), a control hole (903) provided on the control plate (902), the control hole (903) being matched with the inner diameter of the first cleaning tube (501), and a connecting plate (907) fixedly connected to one end of the control plate (902). Two second T-shaped rods (905) are slidably connected to the connecting plate (907). A seventh fixing plate (904) is fixedly connected to the two opposite side walls of the control box (901). The two second T-shaped rods (905) slide on the seventh fixing plate (904). A second spring (906) is sleeved on the side wall of the two second T-shaped rods (905). The two ends of the two second springs (906) are respectively connected to the connecting plate (907) and the seventh fixing plate (904).

7. A backflushing valve for an oil pipeline according to claim 1, characterized in that: The reset assembly (10) includes an eighth fixing plate (1004) fixedly connected to two opposite side walls of the mounting box (103). A third T-shaped rod (1002) is slidably connected to the two eighth fixing plates (1004). A ninth fixing plate (1001) is fixedly connected to the two opposite side walls of the mounting plate (104). One end of the two third T-shaped rods (1002) is connected to the ninth fixing plate (1001). A third spring (1003) is sleeved on the side wall of the two third T-shaped rods (1002). The two ends of the two third springs (1003) are respectively connected to the eighth fixing plate (1004) and the ninth fixing plate (1001).

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