A filtering device for water conservancy irrigation

Abstract

The present invention relates to the technical field of separation devices, and in particular to a filtering device for water conservancy irrigation. It comprises a pipe body, a partition, a blocking plate, a filter screen and a cleaning component. When in use, water is injected into the water inlet pipe from the water injection port. Under the action of the partition and the baffle, the water flows in the water injection cavity to the transition pipe, and the impurities in the water are filtered and separated by the filter screen and accumulated above the filter screen; the filtered water passes through the filter screen and enters the water outlet pipe, and finally flows out of the filter device from the water outlet. During operation, the cleaning component continuously scrapes the impurities accumulated above the filter screen from the filter screen and pushes them into the impurity storage cavity. Compared with the prior art, the present invention can clean the impurities on the filter screen while filtering. On the premise of completing the filtering, the amount of water flowing out of the water outlet will not be reduced due to the blockage of the filter screen, thereby improving the filtering efficiency and the irrigation efficiency at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of separation devices, and in particular to a filtering device for water conservancy irrigation. Background Art

[0002] Water conservancy irrigation filtration devices are usually used to remove impurities, silt, aquatic plants, etc. in the water to ensure the quality of irrigation water, prevent clogging of the irrigation system, and thus improve irrigation efficiency.

[0003] The irrigation filter device mainly uses the filter screen to block impurities and particles. When water flows through the filter screen, the particles are blocked on the filter screen, while the clean water continues to flow to the outlet through the filter screen. During the use of the filter device, as time goes by, impurities and particles will accumulate on the filter screen, resulting in a decrease in water flow. At this time, the filter screen needs to be cleaned to restore normal water flow. In the prior art, when cleaning the filter screen, it is necessary to stop the delivery of irrigation water, and then resume the delivery of irrigation water after cleaning. When there are many impurities in the water, it is necessary to frequently stop the delivery of irrigation water, which seriously affects the progress of irrigation work.

[0004] In addition, during the use of irrigation devices, it is common for insects and ants to mistakenly enter the pipes and cause blockages, so the pipes need to be sealed. However, blocked pipes often produce water hammer effects when the device is suddenly started and closed, which affects their service life. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention proposes a filtering device for water conservancy irrigation, which can clean impurities on the filter screen while filtering, thereby improving the filtering efficiency and the irrigation efficiency, and can effectively prevent insects, ants and limestone from entering the pipeline to avoid pipeline blockage.

[0006] A water conservancy irrigation filtering device of the present invention adopts the following technical solution, including:

[0007] The pipeline body is in an "L" shape and includes an inlet pipe, an outlet pipe and a transition pipe; the inlet pipe extends horizontally, and the outlet pipe extends vertically; the transition pipe is arc-shaped, and the two ends of the transition pipe are respectively connected to the inlet pipe and the outlet pipe, and the transition is smooth; the projection of the inlet pipe on the horizontal plane and the projection of the outlet pipe on the horizontal plane are both rectangular; the end of the inlet pipe away from the transition pipe is the water injection port, and the end of the outlet pipe away from the transition pipe is the water outlet;

[0008] The partition is horizontally arranged at the lower part of the water inlet pipe, and the length of the partition in the axial direction of the water inlet pipe is smaller than the water inlet pipe; the front and rear sides of the partition are fixedly connected to the water inlet pipe, and the partition divides the water inlet pipe into two upper and lower chambers;

[0009] The plugging plate has front and rear sides fixedly connected to the water inlet pipe; one end of the plugging plate is fixedly connected to the end of the partition away from the transition pipe, and the other end of the plugging plate is fixedly connected to the water inlet pipe; the water inlet pipe, the partition and the plugging plate define a storage cavity with an opening toward the transition pipe; a detachable debris removal door is provided at the lower end of the storage cavity; the chamber above the partition is a water injection cavity, and irrigation water is injected into the water injection cavity from the water injection port;

[0010] The filter screen is arranged in the transition pipe, and its front and rear sides are fixedly connected to the transition pipe;

[0011] The cleaning component is installed in the transition pipe and is used to continuously scrape impurities from the filter screen and push them into the impurity storage chamber during operation.

[0012] Optionally, an extension plate is provided in the transition pipe extending along the axial direction of the water inlet pipe, the upper surface of the extension plate is flush with the lower end of the inner wall of the water inlet pipe, one end of the extension plate facing the filter screen is fixedly connected to the lower end of the filter screen, and the connection part between the extension plate and the filter screen is smoothly transitioned;

[0013] The cleaning assembly includes two scraper units; the front and rear ends of the scraper units are in contact with the front and rear inner walls of the transition pipe; a scraper unit is provided with a rotating shaft in the middle of the length direction, the rotating shaft extends in the front and rear direction, and can be rotatably installed around its own axis in the transition pipe; the other scraper unit is provided with a sleeve in the middle of the length direction, and the sleeve is coaxially sleeved on the rotating shaft; the distance from the sleeve axis to the two ends of the scraper unit is equal to the distance from the sleeve axis to the upper surface of the filter screen; the end face of the partition close to one end of the transition pipe is an arc surface, and the distance from the arc surface to the sleeve axis is equal to the distance from the sleeve axis to the two ends of the scraper unit; so that in the process of the scraper unit rotating around the sleeve axis, the end of the scraper unit is in contact with the upper surface of the filter screen and the arc surface of the partition.

[0014] Optionally, in an initial state, the two scraper units block the pipeline body on the side of the filter screen facing the water injection port, and separate the interior of the pipeline body into two parts.

[0015] Optionally, the scraper unit includes a first scraper and a second scraper; the first scraper and the second scraper are respectively located on both sides of the same radial direction of the rotating shaft, and the first scraper and the second scraper are parallel to the radial direction; the first scraper and the second scraper in the scraper unit connected to the rotating shaft are fixedly connected to the rotating shaft, and the first scraper and the second scraper in the scraper unit connected to the shaft sleeve are fixedly connected to the shaft sleeve; the front and rear sides of the first scraper, the second scraper and the shaft sleeve abut against the inner wall of the pipeline body;

[0016] The second scraper is a telescopic plate, and a compression spring is arranged inside the telescopic plate. The compression spring makes the second scraper tend to extend, and the maximum length of the second scraper is consistent with the length of the first scraper; a receiving groove is provided on a side of the first scraper facing the second scraper in another scraper unit, and the opening of the receiving groove faces the second scraper in another scraper, and the receiving groove is used to receive the second scraper in another scraper unit;

[0017] In the initial state, the two scraper units are vertically arranged, the outer end of a first scraper abuts against the connection between the water inlet pipe and the transition pipe, and the outer end of the other first scraper abuts against the connection between the extension plate and the filter; the two second scrapers are respectively received in the two accommodating grooves; a limit assembly is provided between the two scraper units, which is used to ensure that the angle between the two first scrapers can only be reduced within a preset range.

[0018] Optionally, the limiting assembly includes a ratchet and a pawl; the ratchet and the pawl are respectively arranged on the shaft sleeve and the rotating shaft, the ratchet and the pawl cooperate, and the central angle of the ratchet is 90°.

[0019] Optionally, the cleaning component is connected to a reset component for causing the cleaning component to block the water inlet pipe when filtering is stopped.

[0020] Optionally, a connecting block is coaxially and rotatably installed at the front end or rear end of the sleeve; a mounting groove for installing the connecting block is opened on the inner wall of the pipe, and the connecting block can be rotatably installed in the mounting groove; the reset component includes an external torsion spring and an internal torsion spring, and the two ends of the external torsion spring are respectively connected to the connecting block and the sleeve; the internal torsion spring is sleeved on the rotating shaft, and the two ends are respectively connected to the rotating shaft and the sleeve; a blocking member is also provided on the connecting block, and the blocking member is used to keep the connecting block at the initial phase for a preset period of time, which is equal to the period of time for the sleeve to rotate relative to the connecting block by a preset angle, and the preset angle is less than 360°; thereafter, the connecting block is allowed to rotate relative to the mounting groove, and the next cycle starts after the connecting block rotates to the original phase.

[0021] Optionally, the blocking member is a friction plate, and two friction plates are provided, which are respectively installed in the connecting block and the mounting groove, and the two friction plates extend radially along the connecting block; in the initial state, the two friction plates are in friction contact, and the friction force of the two friction plates is equal to the stored force after the external torsion spring rotates a preset angle.

[0022] Optionally, a receiving groove is opened in the sleeve, and the pawl has an extended state and a retracted state. When the pawl is in the extended state, the pawl is engaged with the ratchet wheel; when the pawl is in the retracted state, the pawl is located in the receiving groove; the pawl is connected to a control component, and the control component is used to switch the state of the pawl.

[0023] Optionally, the projection of the blocking plate on a vertical plane parallel to the axis of the water inlet pipe is an inclined plane, and one end of the blocking plate close to the transition pipe is connected to the partition plate, and one end of the blocking plate away from the transition pipe is connected to the water inlet pipe.

[0024] The beneficial effects of the present invention are as follows: when the water conservancy irrigation filter device of the present invention is used, water is injected into the water inlet pipe from the water injection port. Under the action of the partition and the baffle, the water flows in the water injection cavity to the transition pipe, and the impurities in the water are filtered and separated by the filter screen and accumulated above the filter screen; the filtered water enters the water outlet pipe after passing through the filter screen, and finally flows out of the filter device from the water outlet. During operation, the cleaning component continuously scrapes the impurities accumulated above the filter screen from the filter screen and pushes them into the impurity storage cavity. Compared with the prior art, the present invention can clean the impurities on the filter screen while filtering. On the premise of completing the filtering, the amount of water flowing out of the water outlet will not be reduced due to the clogging of the filter screen, which improves the filtering efficiency and the irrigation efficiency at the same time.

[0025] Furthermore, the resetting component enables the cleaning component to block the water inlet pipe when the filtering is stopped, thereby ensuring that the water inlet pipe is always blocked when the filtering work is not performed, effectively preventing insects, ants, limestones from entering the pipe and avoiding pipe blockage.

[0026] Furthermore, when water injection suddenly begins, the impact force of water on the pipeline is converted into a driving force for the rotation of the scraper assembly, thereby reducing the damage to the pipeline body caused by the water hammer effect generated during the sudden water injection, thereby extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 A front view of the present invention;

[0030] Figure 3 This is a schematic diagram of the state when the angle between the two first scrapers in the present invention is 90°;

[0031] Figure 4 It is a schematic diagram of the state when two scraper assemblies in the present invention rotate synchronously;

[0032] Figure 5 It is a schematic diagram of the structure of the cleaning component in the present invention;

[0033] Figure 6 for Figure 5 A front view of

[0034] Figure 7 for Figure 6 Middle AA section cutaway view;

[0035] Figure 8 for Figure 6 Middle BB section cutaway view;

[0036] Fig. 9 for Figure 8 Enlarged view of point C in the middle;

[0037] Fig.10 It is a schematic diagram of the state of the cleaning component when the angle between the two first scrapers in the present invention is 90°.

[0038] In the figure: 100, pipeline body; 110, water inlet pipe; 111, water injection port; 120, transition pipe; 130, water outlet pipe; 131, water outlet; 140, water injection chamber; 200, partition; 210, blocking plate; 220, storage chamber; 230, extension plate; 300, filter; 400, scraper unit; 410, first scraper; 411, receiving groove; 420, second scraper; 421, compression spring; 430, rotating shaft; 431, ratchet; 440, bushing; 441, pawl; 450, connecting block; 460, external torsion spring; 470, internal torsion spring. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] like Figures 1 to 10 As shown, a water conservancy irrigation filtering device provided by an embodiment of the present invention includes a pipe body 100, a partition plate 200, a blocking plate 210, a filter screen 300 and a cleaning component.

[0041] The pipeline body 100 is in an "L" shape, including an inlet pipe 110, an outlet pipe 130 and a transition pipe 120; the inlet pipe 110 extends horizontally, and the outlet pipe 130 extends vertically; the transition pipe 120 is arc-shaped, and the two ends of the transition pipe 120 are respectively connected to the inlet pipe 110 and the outlet pipe 130, and the transition is smooth; the projection of the inlet pipe 110 on the horizontal plane and the projection of the outlet pipe 130 on the horizontal plane are both rectangular; the end of the inlet pipe 110 away from the transition pipe 120 is a water injection port 111, and the end of the outlet pipe 130 away from the transition pipe 120 is a water outlet 131;

[0042] The partition 200 is horizontally arranged at the lower part of the water inlet pipe 110, and the length of the partition 200 in the axial direction of the water inlet pipe 110 is smaller than that of the water inlet pipe 110; the front and rear sides of the partition 200 are fixedly connected to the water inlet pipe 110, and the partition 200 divides the water inlet pipe 110 into two upper and lower chambers;

[0043] The front and rear sides of the plugging plate 210 are fixedly connected to the water inlet pipe 110; one end of the plugging plate 210 is fixedly connected to the end of the partition 200 away from the transition pipe 120, and the other end of the plugging plate 210 is fixedly connected to the water inlet pipe 110; the water inlet pipe 110, the partition 200 and the plugging plate 210 define a storage chamber 220 with an opening toward the transition pipe 120; a detachable impurity removal door is provided at the lower end of the storage chamber 220; the chamber above the partition 200 is a water injection chamber 140, and irrigation water is injected into the water injection chamber 140 from the water injection port 111;

[0044] The filter screen 300 is disposed in the transition pipe 120, and its front and rear sides are fixedly connected to the transition pipe 120;

[0045] The cleaning assembly is installed in the transition pipe 120 and is used to continuously scrape impurities from the filter screen 300 and push them into the impurity storage chamber 220 during operation.

[0046] When in use, water is injected into the water inlet pipe 110 from the water injection port 111. Under the action of the partition plate 200 and the blocking plate 210, the water flows from the water injection chamber 140 to the transition pipe 120. The impurities in the water are filtered and separated by the filter screen 300 and accumulated above the filter screen 300. The filtered water enters the water outlet pipe 130 after passing through the filter screen 300, and finally flows out of the filter device from the water outlet 131. During operation, the cleaning component continuously scrapes the impurities accumulated above the filter screen 300 from the filter screen 300 and pushes them into the impurity storage chamber 220. After a period of use, there are many impurities stored in the impurity storage chamber 220. The impurity removal door can be opened to clean the impurities in the impurity storage chamber 220. Compared with the prior art, the present invention can clean the impurities on the filter screen 300 while filtering. On the premise of completing the filtering, the amount of water flowing out of the water outlet 131 will not be reduced due to the blockage of the filter screen 300, which improves the filtering efficiency and the irrigation efficiency.

[0047] In a further embodiment, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown; an extension plate 230 is provided in the transition pipe 120 extending along the axial direction of the water inlet pipe 110, the upper surface of the extension plate 230 is flush with the lower end of the inner wall of the water inlet pipe 110, and one end of the extension plate 230 facing the filter screen 300 is fixedly connected to the lower end of the filter screen 300, and the connection part between the extension plate 230 and the filter screen 300 is smoothly transitioned;

[0048] The cleaning assembly includes two scraper units 400; the front and rear ends of the scraper units 400 abut against the front and rear inner walls of the transition tube 120; a scraper unit 400 is provided with a rotating shaft 430 in the middle of the length direction, the rotating shaft 430 extends in the front and rear direction, and can be rotatably installed in the transition tube 120 around its own axis; the other scraper unit 400 is provided with a shaft sleeve 440 in the middle of the length direction, and the shaft sleeve 440 is coaxially sleeved on the rotating shaft 430; the shaft sleeve 440 is The distance from the line to the two ends of the scraper unit 400 is equal to the distance from the axis of the sleeve 440 to the upper surface of the filter 300; the end face of the partition 200 close to the end of the transition pipe 120 is an arc surface, and the distance from the arc surface to the axis of the sleeve 440 is equal to the distance from the axis of the sleeve 440 to the two ends of the scraper unit 400; thus, in the process of the scraper unit 400 rotating around the axis of the sleeve 440, the end of the scraper unit 400 abuts against the upper surface of the filter 300 and the arc surface of the partition 200.

[0049] When water flows from the water injection cavity 140 toward the transition pipe 120, the water impacts the two scraper units 400; due to the existence of the partition 200, since the length of the scraper unit 400 located above the partition 200 is greater than the length located below the partition 200, the two scraper units 400 synchronously rotate clockwise around the axis of the rotating shaft 430, and then the two scraper units 400 continue to rotate under the continuous impact of water and the inertia of the two scraper units 400 themselves, referring to Figure 2 , Figure 3 and Figure 4 , the scraper unit 400 rotates in a clockwise direction; during the rotation of the scraper unit 400, the end of the scraper unit 400 abuts against the upper surface of the filter screen 300, thereby scraping off the impurities accumulated above the filter screen 300 from the filter screen 300 and pushing them to the top of the extension plate 230; the scraper unit 400 continues to rotate, pushing the impurities to the storage chamber 220 to complete the collection; after the scraper unit 400 rotates by a preset angle, the end of the scraper unit 400 abuts against the arc surface of the partition 200; the filtered water passes through the filter screen 300 and enters the water outlet pipe 130, and finally flows out of the filtering device from the water outlet 131. By setting two scraper units 400, the cleaning interval of the cleaning component for the filter screen 300 is shortened, the scraper is cleaned at a faster frequency, the cleaning efficiency is improved, and the filtering effect of the filter screen 300 is further guaranteed.

[0050] In a further embodiment, Figure 1 , Figure 2 As shown; in the initial state, the two scraper units 400 block the pipe body 100 on the side of the filter 300 facing the water injection port 111, and separate the inside of the pipe body 100 into two parts, thereby preventing insects and ants from mistakenly entering the pipe and causing blockage of the pipe.

[0051] In a further embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Fig.10 As shown; the scraper unit 400 includes a first scraper 410 and a second scraper 420; the first scraper 410 and the second scraper 420 are respectively located on both sides of the same radial direction of the rotating shaft 430, and the first scraper 410 and the second scraper 420 are parallel to the radial direction; the first scraper 410 and the second scraper 420 in the scraper unit 400 connected with the rotating shaft 430 are fixedly connected to the rotating shaft 430, and the first scraper 410 and the second scraper 420 in the scraper unit 400 connected with the shaft sleeve 440 are fixedly connected to the shaft sleeve 440; the front and rear sides of the first scraper 410, the second scraper 420 and the shaft sleeve 440 abut against the inner wall of the pipeline body 100, and the friction coefficient of the abutting surface is small; when the water flow drives the cleaning component to rotate, it needs to overcome the friction between the abutting surfaces. By reducing the friction coefficient between the abutting surfaces, most of the kinetic energy of the water is used to drive the cleaning component to rotate, thereby utilizing the kinetic energy of the water to a greater extent.

[0052] The second scraper 420 is a telescopic plate, and a compression spring 421 is arranged inside the telescopic plate. The compression spring 421 makes the second scraper 420 tend to extend, and the maximum length of the second scraper 420 is consistent with the length of the first scraper 410; the first scraper 410 is provided with a receiving groove 411 on a side facing the second scraper 420 in another scraper unit 400, and the opening of the receiving groove 411 faces the second scraper 420 in another scraper, and the receiving groove 411 is used to receive the second scraper 420 in another scraper unit 400;

[0053] In the initial state, the two scraper units 400 are vertically arranged, the outer end of a first scraper 410 abuts against the connection between the water inlet pipe 110 and the transition pipe 120, and the outer end of the other first scraper 410 abuts against the connection between the extension plate 230 and the filter 300; the two second scrapers 420 are respectively received in the two accommodating grooves 411; a limit assembly is provided between the two scraper units 400, which is used to ensure that the angle between the two first scrapers 410 can only be reduced within a preset range.

[0054] The scraper unit 400 in the initial state is as follows Figure 1 , Figure 2 , Figure 6 As shown, when water flows from the water injection cavity 140 to the transition pipe 120, the water impacts the two scraper units 400; the force arm of the first scraper 410 is greater than that of the second scraper 420, so the two first scrapers 410 rotate around the axis of the rotating shaft 430 at the same time under the push of water, referring to Figure 2, the upper first scraper 410 rotates clockwise, and the lower first scraper 410 rotates counterclockwise. The two first scrapers 410 drive the two second scrapers 420 to rotate while rotating. After the two second scrapers 420 leave the receiving groove 411, the compression spring 421 extends the second scrapers 420. Under the action of the limit assembly, the angle between the two first scrapers 410 can only be reduced within a preset range of 90° to 180°. After the angle between the two reaches 90°, the angle cannot be further reduced. Figure 3 Then, driven by the water flow, the two scraper units 400 rotate clockwise, and then, under the continuous impact of the water and the inertia of the two scraper units 400, the two scraper units 400 continue to rotate, referring to Figure 4 ;

[0055] When the present invention suddenly starts to inject water, the impact force of water on the pipeline is converted into the driving force for the rotation of the scraper assembly, thereby reducing the damage to the pipeline body 100 caused by the water hammer effect generated when the water is suddenly injected, thereby extending the service life of the device. During the rotation of the scraper unit 400, the ends of the first scraper 410 and the second scraper 420 away from the axis of the rotating shaft 430 abut against the upper surface of the filter 300, thereby scraping off the impurities accumulated on the filter 300 from the filter 300 and pushing them to the top of the extension plate 230; the scraper unit 400 continues to rotate, pushing the impurities to the storage chamber 220 to complete the collection; after the scraper unit 400 rotates by a preset angle, the end of the scraper unit 400 abuts against the arc surface of the partition 200; the filtered water passes through the filter 300 and enters the water outlet pipe 130, and finally flows out of the filter device from the water outlet 131.

[0056] In a further embodiment, Figure 8 , Fig. 9 As shown; the limiting assembly includes a ratchet 431 and a pawl 441; the ratchet 431 and the pawl 441 are respectively disposed on the sleeve 440 and the shaft 430, the ratchet 431 cooperates with the pawl 441, and the central angle of the ratchet 431 is 90°.

[0057] When water flows in the water injection chamber 140 toward the transition pipe 120, the water impacts the two scraper units 400, and the two first scrapers 410 rotate simultaneously around the axis of the rotating shaft 430 under the push of the water. Figure 2The upper first scraper 410 rotates clockwise, and the lower first scraper 410 rotates counterclockwise. While the two first scrapers 410 rotate, they drive the two second scrapers 420 to rotate synchronously. The first scraper 410 connected to the rotating shaft 430 drives the rotating shaft 430 to rotate. The first scraper 410 connected to the sleeve 440 drives the sleeve 440 to rotate synchronously. The sleeve 440 drives the pawl 441 to rotate, and the rotating shaft 430 drives the ratchet 431 to rotate. The angle between the two first scrapers 410 gradually increases. When the angle between the two reaches 90°, the angle cannot continue to increase. Thereafter, the two scraper units 400 synchronously rotate clockwise around the axis of the rotating shaft 430 to clean the impurities on the filter 300.

[0058] In a further embodiment, the cleaning assembly is connected to a reset assembly, which is used to make the cleaning assembly block the water inlet pipe 110 when the filtering is stopped. Thereby ensuring that the water inlet pipe 110 is always blocked when the filtering work is not performed, and no pipeline blockage will be caused.

[0059] In a further embodiment, Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown; the front end or rear end of the sleeve 440 is coaxially and rotatably mounted with a connecting block 450; the inner wall of the pipe is provided with a mounting groove for mounting the connecting block 450, and the connecting block 450 is rotatably mounted in the mounting groove; the reset assembly includes an outer torsion spring 460 and an inner torsion spring 470, and the two ends of the outer torsion spring 460 are respectively connected to the connecting block 450 and the sleeve 440; the inner torsion spring 470 is sleeved on the rotating shaft 430, and the two ends are respectively connected to the rotating shaft 430 and the sleeve 440. A blocking member is also provided on the connecting block 450, and the blocking member is used to keep the connecting block 450 at the initial phase for a preset time, which is equal to the time when the sleeve 440 rotates relative to the connecting block 450 by a preset angle, and the preset angle is less than 360°; thereafter, the connecting block 450 can be rotated relative to the mounting groove, and the next cycle starts after the connecting block 450 rotates to the original phase.

[0060] When water flows in the water injection chamber 140 toward the transition pipe 120, the water impacts the two scraper units 400, causing the two first scrapers 410 to rotate synchronously in opposite directions. During the relative rotation of the two first scrapers 410, the internal torsion spring 470 stores force, and with the cooperation of the pawl 441 and the ratchet 431, the internal torsion spring 470 is in a state of storing force; when the angle between the two first scrapers 410 reaches 90°, the kinetic energy of the water flow drives the two scraper units 400 to rotate synchronously clockwise around the axis of the sleeve 440; during the synchronous rotation of the two scraper units 400, the sleeve 440 rotates synchronously with the scraper assembly connected thereto, and under the action of the blocking block, the connecting block 450 maintains the original phase unchanged, and thereafter during the relative rotation of the connecting block 450 and the sleeve 440, the external torsion spring 460 stores force; when the sleeve 440 rotates relative to the connecting block 450 by a preset angle After that, the blocking member releases the blocking of the connecting block 450, and the connecting block 450 can rotate relative to the installation groove, and the external torsion spring 460 releases the elastic force and returns to its original state, thereby driving the connecting block 450 to rotate rapidly until the connecting block 450 returns to its initial phase and starts the next cycle; during the filtering process, the two scraper assemblies continue to rotate synchronously; when the filtering work is completed, the scraper assembly loses the thrust of the water, and the speed decreases under the action of inertia until the forward rotation stops; at this time, the connecting block 450 is in the initial phase, and the tendency of the external torsion spring 460 to release the elastic force is not hindered, and the external torsion spring 460 drives the scraper unit 400 to rotate rapidly counterclockwise until the external torsion spring 460 returns to its original state, and the scraper unit 400 returns to its initial phase, blocking the water inlet pipe 110, thereby ensuring that when the filtering work is not in progress, the water inlet pipe 110 is always blocked and does not cause pipeline blockage;

[0061] In a further embodiment, the blocking member is a friction plate, and two friction plates are provided, which are respectively installed in the connecting block 450 and the mounting groove, and the two friction plates extend radially along the connecting block 450; in the initial state, the two friction plates are in friction contact, and the friction force of the two friction plates is equal to the stored force after the external torsion spring 460 rotates a preset angle.

[0062] In the initial state, the two friction plates are in frictional contact. When the two scraper assemblies rotate synchronously clockwise, the friction plates block the rotation of the connecting block 450 to keep it in its initial phase. When the sleeve 440 rotates relative to the connecting block 450, the external torsion spring 460 accumulates force. After the sleeve 440 rotates relative to the connecting block 450 by a preset angle, the accumulated force of the external torsion spring 460 is sufficient to overcome the friction between the two friction plates. The connecting block 450 is freed from obstruction and begins to rotate relative to the mounting groove. Thereafter, the release of the elastic force of the external torsion spring 460 is unimpeded and returns to its original state. During this process, the external torsion spring 460 drives the connecting block 450 to rotate rapidly clockwise until the two friction plates are in contact again.

[0063] In a further embodiment, a receiving groove is opened in the sleeve 440, and the pawl 441 has an extended state and a retracted state. When the pawl 441 is in the extended state, the pawl 441 is engaged with the ratchet 431; when the pawl 441 is in the retracted state, the pawl 441 is located in the receiving groove; the pawl 441 is connected to a control component, which is used to switch the state of the pawl 441, and the control component can be a cylinder.

[0064] When the filtering work is finished, the scraper assembly loses the thrust of the water, and the speed decreases under the action of inertia until the forward rotation stops; under the action of the external torsion spring 460, the scraper unit 400 returns to the initial phase and blocks the water inlet pipe 110; at this time, the control component is started to switch the pawl 441 to the recovery state, at which time the pawl 441 and the ratchet 431 are out of meshing state, and the trend of the internal torsion spring 470 returning to the initial state is no longer hindered; in the process of the internal torsion spring 470 returning to the initial state, the two scraper units 400 are driven to rotate relative to each other and return to the initial state, and the angle between the two first scrapers 410 gradually increases until both are in a vertical state; the side of the accommodating groove 411 away from the axis of the rotating shaft 430 is an inclined surface, so that when the second scraper 420 approaches the first scraper 410 of another scraper unit 400, the outer end of the second scraper 420 abuts against the inclined surface, compressing the compression spring 421 until the second scraper 420 is in the accommodating groove 411 of the other scraper unit 400. This ensures that when no filtering is performed, the water inlet pipe 110 is always blocked, and does not cause pipe blockage.

[0065] In a further embodiment, Figure 2 , Figure 4 As shown; the projection of the blocking plate 210 on the vertical plane parallel to the axis of the water inlet pipe 110 is an inclined plane, the end of the blocking plate 210 close to the transition pipe 120 is connected to the partition 200, and the end of the blocking plate 210 away from the transition pipe 120 is connected to the water inlet pipe 110.

[0066] By setting the blocking plate 210 to an inclined state, when water enters the water inlet pipe 110 from the water injection port 111, the blocking plate 210 guides the water to the top of the partition 200 instead of blocking the flow of water. The kinetic energy of the water flow is consumed less, thereby being able to utilize the kinetic energy of the water flow to a greater extent. In addition, the blocking plate 210 is subjected to less impact force from the water flow, and the service life of the blocking plate 210 is longer, thereby extending the service life of the filter device.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A filtering device for water conservancy irrigation, characterized in that: include: The pipeline body is in an "L" shape and includes an inlet pipe, an outlet pipe and a transition pipe; The water inlet pipe extends horizontally, and the water outlet pipe extends vertically; the transition pipe is arc-shaped, and the two ends of the transition pipe are connected to the water inlet pipe and the water outlet pipe respectively, and the transition is smooth; the projection of the water inlet pipe on the horizontal plane and the projection of the water outlet pipe on the horizontal plane are both rectangular; the end of the water inlet pipe away from the transition pipe is the water inlet, and the end of the water outlet pipe away from the transition pipe is the water outlet; an extension plate is provided in the transition pipe extending along the axial direction of the water inlet pipe, and the upper surface of the extension plate is flush with the lower end of the inner wall of the water inlet pipe; The partition is horizontally arranged at the lower part of the water inlet pipe, and the length of the partition in the axial direction of the water inlet pipe is smaller than the water inlet pipe; the front and rear sides of the partition are fixedly connected to the water inlet pipe, and the partition divides the water inlet pipe into two upper and lower chambers; The plugging plate has front and rear sides fixedly connected to the water inlet pipe; one end of the plugging plate is fixedly connected to the end of the partition away from the transition pipe, and the other end of the plugging plate is fixedly connected to the water inlet pipe; the water inlet pipe, the partition and the plugging plate define a storage cavity with an opening toward the transition pipe; a detachable debris removal door is provided at the lower end of the storage cavity; the chamber above the partition is a water injection cavity, and irrigation water is injected into the water injection cavity from the water injection port; The filter screen is arranged in the transition pipe, and its front and rear sides are fixedly connected to the transition pipe; one end of the filter screen facing the extension plate is fixedly connected to the extension plate, and the connecting part of the two is smoothly transitioned; A cleaning assembly is installed in the transition pipe and is used to continuously scrape impurities from the filter screen and push them into the impurity storage chamber during operation; the cleaning assembly includes two scraper units; the front and rear ends of the scraper units abut against the front and rear inner walls of the transition pipe; a scraper unit is provided with a rotating shaft in the middle of the length direction, the rotating shaft extends in the front and rear direction, and can be rotatably installed around its own axis in the transition pipe; the other scraper unit is provided with a shaft sleeve in the middle of the length direction, and the shaft sleeve is coaxially sleeved on the rotating shaft; the distance from the shaft sleeve axis to the two ends of the scraper unit is equal to the distance from the shaft sleeve axis to the upper surface of the filter screen; the end face of the partition close to one end of the transition pipe is an arc surface, and the distance from the arc surface to the shaft sleeve axis is equal to the distance from the shaft sleeve axis to the two ends of the scraper unit; During the rotation of the scraper unit around the axis of the sleeve, the end of the scraper unit abuts against the upper surface of the filter screen and the arc surface of the partition. In the initial state, the two scraper units block the pipeline body on the side of the filter screen facing the water inlet, and divide the inside of the pipeline body into two parts. The scraper unit includes a first scraper and a second scraper; the first scraper and the second scraper are respectively located on both sides of the same radial direction of the rotating shaft, and the first scraper and the second scraper are parallel to the radial direction; the first scraper and the second scraper in the scraper unit connected to the rotating shaft are fixedly connected to the rotating shaft, and the first scraper and the second scraper in the scraper unit connected to the sleeve are fixedly connected to the sleeve; the front and rear sides of the first scraper, the second scraper and the sleeve abut against the inner wall of the pipeline body; The second scraper is a telescopic plate, and a compression spring is arranged inside the telescopic plate. The compression spring makes the second scraper tend to extend, and the maximum length of the second scraper is consistent with the length of the first scraper; a receiving groove is provided on a side of the first scraper facing the second scraper in another scraper unit, and the opening of the receiving groove faces the second scraper in another scraper, and the receiving groove is used to receive the second scraper in another scraper unit; In the initial state, the two scraper units are vertically arranged, the outer end of a first scraper abuts against the connection between the water inlet pipe and the transition pipe, and the outer end of the other first scraper abuts against the connection between the extension plate and the filter screen; the two second scrapers are respectively received in the two receiving grooves; a limit assembly is provided between the two scraper units, which is used to reduce the angle between the two first scrapers only within a preset range, and the limit assembly includes a ratchet and a pawl; the ratchet and the pawl are respectively arranged on the shaft sleeve and the rotating shaft, the ratchet and the pawl cooperate, and the central angle of the ratchet is 90°. The cleaning assembly is connected with a reset assembly, which is used to make the cleaning assembly block the water inlet pipe when the filtration stops. When water flows from the water injection chamber to the transition pipe, Water impacts the two scraper units, and the two first scrapers rotate simultaneously around the axis of the rotating shaft under the push of water. The upper first scraper rotates clockwise, and the lower first scraper rotates counterclockwise. While the two first scrapers rotate, they drive the two second scrapers to rotate synchronously. The first scraper connected to the rotating shaft drives the rotating shaft to rotate, the first scraper connected to the sleeve drives the sleeve to rotate synchronously, the sleeve drives the pawl to rotate, and the rotating shaft drives the ratchet to rotate; the angle between the two first scrapers gradually increases, and when the angle between the two reaches 90°, the angle cannot continue to increase. Thereafter, the two scraper units synchronously rotate clockwise around the axis of the rotating shaft to clean impurities on the filter screen.

2. A water conservancy irrigation filtering device according to claim 1, characterized in that: A connecting block is coaxially and rotatably installed at the front end or rear end of the sleeve; an installation groove for installing the connecting block is opened on the inner wall of the pipeline, and the connecting block can be rotatably installed in the installation groove; the reset component includes an external torsion spring and an internal torsion spring, and the two ends of the external torsion spring are respectively connected to the connecting block and the sleeve; the internal torsion spring is sleeved on the rotating shaft, and the two ends are respectively connected to the rotating shaft and the sleeve; a blocking member is also provided on the connecting block, and the blocking member is used to keep the connecting block at the initial phase for a preset time, which is equal to the time when the sleeve rotates relative to the connecting block by a preset angle, and the preset angle is less than 360°; thereafter, the connecting block can be rotated relative to the installation groove, and the next cycle starts after the connecting block rotates to the original phase.

3. A water conservancy irrigation filtering device according to claim 2, characterized in that: The blocking member is a friction plate, and two friction plates are provided, which are respectively installed in the connecting block and the mounting groove, and the two friction plates extend radially along the connecting block; in the initial state, the two friction plates are in friction contact, and the friction force of the two friction plates is equal to the stored force after the external torsion spring rotates a preset angle.

4. A water conservancy irrigation filtering device according to claim 3, characterized in that: A receiving groove is provided in the shaft sleeve, and the pawl has an extended state and a retracted state. When the pawl is in the extended state, the pawl is engaged with the ratchet wheel; when the pawl is in the retracted state, the pawl is located in the receiving groove; the pawl is connected to a control component, and the control component is used to switch the state of the pawl.

5. A water conservancy irrigation filtering device according to any one of claims 1 to 4, characterized in that: The projection of the plugging plate on a vertical plane parallel to the axis of the water inlet pipe is an inclined plane. The end of the plugging plate close to the transition pipe is connected to the partition plate, and the end of the plugging plate away from the transition pipe is connected to the water inlet pipe.

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