Pipeline filtering device with automatic cleaning function

Abstract

The application belongs to the technical field of filtering devices, and particularly relates to a pipeline filtering device with an automatic cleaning function, which comprises a pipeline main body, a filtering main body for accommodating the filtering device is arranged on the pipeline main body, pipeline water inlet cavities and pipeline water outlet cavities for passing fluid are arranged at two ends of the pipeline main body respectively, and a switch valve for controlling water flow is connected to the pipeline water inlet cavities; a valve cover is arranged at one end of the filtering main body, and the valve cover is detachably connected to the filtering main body; a scraping net capable of axially sliding relative to the filtering net is arranged on the inner side of the filtering net, an elastic component is arranged between the scraping net and the valve cover, and the scraping net is matched with the filtering net in shape; through the above structure, the scraping net capable of sliding relative to the filtering net is arranged in the filtering net, when the filtering net is blocked by sundries, the elastic component pushes the scraping net to move towards the pipeline water inlet cavity, the scraping net and the filtering net are relatively moved, the sundries on the filtering net can be scraped by the scraping net, the cleaning function of the filtering net is realized, the service life of the filtering net is prolonged, and the cleaning frequency of the filtering net is reduced.

Description

Technical Field

[0001] This invention belongs to the field of filtration device technology, specifically relating to a pipeline filtration device with automatic cleaning function. Background Technology

[0002] Filtering devices are used to filter impurities from fluids to protect the equipment in pipelines. When fluid enters the filtering device through the pipe inlet, solid impurities are trapped inside the filter screen, while clean fluid passes through the filter screen and is discharged from the pipe outlet. However, after a period of use, existing filters accumulate filtered impurities, affecting the filtration effect. Therefore, frequent manual cleaning of the filter screens is necessary, wasting considerable manpower.

[0003] In view of the above problems, it is particularly important to design a filtration device that can automatically clean impurities from the filter screen. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to reduce the frequency of filter cleaning and to provide a filter device with automatic cleaning function, thereby reducing the workload of staff in cleaning the filter.

[0005] To solve the above-mentioned technical problems, the present invention provides a pipeline filtration device with automatic cleaning function, including a pipeline body, a filter body for accommodating the filter device, the filter device being an annular filter screen, and a pipeline inlet chamber and a pipeline outlet chamber for fluid passage at both ends of the pipeline body, the pipeline inlet chamber and the pipeline outlet chamber being interconnected through the filter body, the pipeline inlet chamber being connected to a switch valve for controlling the flow of water; a valve cover for sealing is provided at the end of the filter body away from the pipeline body, the valve cover being detachably connected to the filter body, one end of the filter screen being close to the pipeline inlet chamber and abutting the lower end of the filter body, the other end of the filter screen abutting the valve cover; a scraper screen capable of sliding relative to its axial direction is provided on the inner side of the filter screen, an elastic component is provided between the scraper screen and the valve cover, the shape of the scraper screen is adapted to the filter screen, and the outer side of the scraper screen is close to the inner side of the filter screen, one end of the scraper screen is connected to the elastic component, and the other end of the scraper screen is close to the pipeline inlet chamber.

[0006] Furthermore, a pressure relief hole is provided on the side near the water inlet chamber of the pipe, and a pressure relief plug is detachably installed inside the pressure relief hole.

[0007] Furthermore, the scraper has a hollow structure and an opening at its lower end. The sidewall of the scraper has multiple filter holes. The inner side of the scraper has a sealing plate that slides relative to its axial direction. The sealing plate can contact the bottom of the scraper. A second spring is provided between the sealing plate and the scraper. The elastic force of the second spring is less than the elastic force of the elastic component.

[0008] Furthermore, the elastic component includes an elastic base connected to the valve cover and a support rod connected to the scraper. A first spring is provided between the elastic base and the support rod, and an elastic protective cover is fitted on the outside of the first spring.

[0009] Furthermore, the valve cover has a valve cover partition fixedly connected to its inner side, and the elastic base is threadedly connected to the valve cover partition.

[0010] Furthermore, the valve cover has a valve cover partition fixedly connected to its inner side, and the elastic base is fitted inside the valve cover partition. The elastic base can move relative to the valve cover partition. The valve cover has a plug threadedly connected to it, and the plug abuts against the elastic base. The valve cover has a threaded hole, and the inner diameter of the threaded hole is larger than the diameter of the elastic base.

[0011] This invention, through the above structure, uses a scraper that slides relative to the filter screen inside. When the filter screen is clogged with debris, the switch valve on the inlet side of the pipeline is closed, while the pressure relief plug in the pressure relief hole is opened, reducing the pressure in the inlet chamber. When the pressure in the inlet chamber is less than the elastic force of the elastic component, the elastic component pushes the scraper to move closer to the inlet chamber. The relative movement between the scraper and the filter screen allows the scraper to remove debris from the filter screen, achieving a cleaning function, increasing the filter screen's lifespan, and reducing the frequency of cleaning. Attached Figure Description

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the present invention from another perspective;

[0015] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 4 This is a schematic diagram of the structure of the elastic component in this invention;

[0017] Figure 5 This is a schematic diagram of the scraper mesh structure in this invention;

[0018] Figure 6 This is a partially enlarged schematic diagram of point A in this invention;

[0019] Figure 7 This is a schematic diagram of the connection between the elastic component and the valve cover in this invention;

[0020] Figure 8 This is a schematic diagram of another connection method between the elastic component and the valve cover in this invention;

[0021] In the diagram: 1-pipe body, 2-pipe inlet chamber, 3-pipe outlet chamber, 4-filter body, 5-valve cover, 6-filter screen, 7-scraper screen, 8-pressure relief hole, 9-elastic base, 10-support rod, 11-first spring, 12-elastic protective cover, 13-sliding sleeve, 14-sealing plate, 15-second spring, 16-scraper, 17-valve cover partition, 18-plug; Detailed Implementation

[0022] See attached document Figures 1 to 3 This invention provides a pipe filtration device with automatic cleaning function, including a pipe body 1, a filter body 4 for accommodating the filter device on the pipe body 1, the filter device being an annular filter screen 6, a pipe inlet chamber 2 and a pipe outlet chamber 3 for fluid to pass through at both ends of the pipe body 1, the filter body 4 being disposed between the pipe inlet chamber 2 and the pipe outlet chamber 3, the filter body 4 penetrating the pipe body 1, the pipe inlet chamber 2 and the pipe outlet chamber 3 being interconnected through the filter body 4, and a switch valve for controlling the flow of water connected to the pipe inlet chamber 2.

[0023] The filter body 4 has a hollow structure with its upper and lower ends interconnected. The filter screen 6 is parallel to the axis of the filter body 4, and there is a certain gap between the outer wall of the filter screen 6 and the filter body 4. A valve cover 5 for sealing is provided at the end of the filter body 4 away from the main pipe 1. A sealing ring is provided between the valve cover 5 and the filter body 4 to prevent fluid overflow. The valve cover 5 and the filter body 4 are detachably connected, for example, by bolts. One end of the filter screen 6 is close to the water inlet chamber 2 of the pipe and abuts against the lower end of the filter body 4. The inner diameter of the filter screen 6 is larger than the inner diameter of the water inlet chamber 2 of the pipe, ensuring that all the fluid in the water inlet chamber 2 can enter the interior of the filter screen 6. The other end of the filter screen 6 abuts against the valve cover 5. After the valve cover 5 is fixed to the filter body 4, it can restrict the filter screen 6 from moving along its axial direction. At the same time, when the valve cover 5 is separated from the filter body 4, the filter screen 6 can be removed from the upper end of the filter body 4. This structure facilitates the installation of the filter screen 6 and the cleaning of impurities inside the filter body 4.

[0024] Preferred, see Figure 6 The filter screen 6 extends from one end near the valve cover 5 away from its rotation center. The extended end is located between the valve cover 5 and the filter body 4. The filter body 4 has a groove to accommodate the extended end of the filter screen 6. When the valve cover 5 is connected to the filter body 4, the extended end of the filter screen 6 is pressed to facilitate the fixation of the filter screen 6.

[0025] A scraper 7, capable of sliding axially relative to the filter screen 6, is provided on the inner side of the filter screen 6. An elastic component is provided between the scraper 7 and the valve cover 5. The elastic component applies a force to the scraper 7, causing the scraper 7 to move towards the water inlet chamber 2 of the pipe. The shape of the scraper 7 is adapted to the filter screen 6, and the outer side of the scraper 7 is close to the inner side of the filter screen 6. One end of the scraper 7 is connected to the elastic component, and the other end of the scraper 7 is close to the water inlet chamber 2 of the pipe.

[0026] A pressure relief hole 8 is provided on the side near the water inlet chamber 2 of the pipeline, and a pressure relief plug is detachably installed inside the pressure relief hole 8.

[0027] Through the above structure, in normal use, fluid such as water enters from the inlet chamber 2 of the pipe, is filtered by the filter screen 6, and flows out from the outlet chamber 3 of the pipe. Simultaneously, under the pressure of the water flow, the scraper 7 compresses the elastic component and moves away from the inlet chamber 2. The scraper 7 can move relative to the filter screen 6 according to the water pressure, adjusting the filtration area on the filter screen 6, i.e., the contact area between the filter screen 6 and the water flow. When the filter screen 6 is clogged with debris, the switch valve on one side of the inlet chamber 2 is closed, and the pressure relief plug in the pressure relief hole 8 is opened, reducing the pressure inside the inlet chamber 2. When the pressure inside the inlet chamber 2 is less than the elastic force of the elastic component, the elastic component pushes the scraper 7 towards the inlet chamber 2. The relative movement between the scraper 7 and the filter screen 6, with the outer side of the scraper 7 close to the inner side of the filter screen 6, allows the scraper 7 to remove debris from the filter screen 6, thus cleaning the filter screen 6.

[0028] Pressure sensors are installed in both the inlet chamber 2 and the outlet chamber 3 of the pipeline to detect pressure changes within the two chambers. These sensors are connected to a control center, which uses the sensor readings to determine the pressure difference between the two chambers. When the filter screen 6 becomes clogged, the pressure in the inlet chamber 2 increases. The control center then closes the valve on one side of the inlet chamber 2, thus cleaning the filter screen 6.

[0029] See Figure 4The elastic component includes an elastic base 9 connected to the valve cover 5 and a support rod 10 connected to the scraper 7. A first spring 11 is provided between the elastic base 9 and the support rod 10. An elastic protective cover 12 is fitted on the outside of the first spring 11 to prevent impurities in the water from directly contacting the first spring 11. The elastic protective cover 12 can be made of rubber, with one end connected to the elastic base 9 and the other end connected to the support rod 10. Preferably, in order to reduce the total length of the elastic component in the retracted state, a sliding sleeve 13 is provided between the support rod 10 and the elastic base 9. The support rod 10 is slidably connected to the sliding sleeve 13, and the sliding sleeve 13 is connected to the elastic protective cover 12. Since the elastic protective cover 12 has a certain degree of contractility, when the elastic component is retracted, the total length of the elastic protective cover 12 and the sliding sleeve 13 can be shortened, thereby reducing the total length of the elastic component in the retracted state.

[0030] See Figure 3 and Figure 5 The scraper screen 7 has a hollow structure with an opening at its lower end, forming a cavity with a one-way opening on its inner side, allowing the inner cavity to communicate with the outer side. The opening is close to the water inlet cavity 2 of the pipe. The sidewall of the scraper screen 7 has multiple filter holes. A sealing plate 14, which slides axially relative to the inner side of the scraper screen 7, is located on its inner side. The sealing plate 14 can contact the bottom of the inner side of the scraper screen 7, forming a closed cavity on the inner side of the scraper screen 7 when in contact. A second spring 15 is provided between the sealing plate 14 and the scraper screen 7. The second spring 15 is located on the inner side of the scraper screen 7, on the side of the sealing plate 14 away from the water inlet cavity 2 of the pipe. The elastic force of the second spring 15 is less than the elastic force of the elastic component.

[0031] With the above structure, when the switch valve of the water inlet chamber 2 of the pipeline is in the closed state, the second spring 15 is in the free extension state. The second spring 15 has a certain length, so that the sealing plate 14 is close to the water inlet chamber 2 of the pipeline and contacts the bottom of the scraper 7. At this time, if the water flow in the water outlet chamber 3 of the pipeline flows backward, that is, the water flow flows backward from the water outlet chamber 3 to the water inlet chamber 2 of the pipeline, the sealing plate 14 and the bottom of the scraper 7 can play a certain sealing role, preventing the water flow from flowing backward to the inside of the water inlet chamber 2 of the pipeline. After the valve at the inlet chamber 2 of the pipeline is closed, the scraper 7 moves relative to the filter screen 6 under the action of the elastic element and can clean the debris on the surface of the filter screen 6. The cleaned debris is concentrated at the inlet chamber 2 of the pipeline. At this time, the water flow in the inlet chamber 2 of the pipeline is likely to carry the cleaned debris back into the filter screen 6, increasing the probability of the filter screen 6 being blocked. Through the above structure, the pressure relief seal is installed in the pressure relief hole 8, and the valve at the inlet chamber 2 of the pipeline is opened. Water flows in from the inlet chamber 2 of the pipeline. Since the sealing plate 14 is located at the lower end of the scraper 7 and is in contact with the scraper 7, the water flow preferentially contacts the sealing plate 14. The pressure of the water flow can push the sealing plate 14 to move, releasing the seal plate 14 from the scraper 7. After the sealing plate 14 and the scraper screen 7 are no longer in contact, a gap is formed between the sealing plate 14 and the scraper screen 7. Water can enter the inner side of the scraper screen 7 through the gap between the sealing plate 14 and the scraper screen 7. At the same time, the debris being cleaned can also enter the inner side of the scraper screen 7 under the influence of the water flow. Since the scraper screen 7 has filter holes on its side wall, the debris can be filtered and left on the inner side of the scraper screen 7. As the debris accumulates, the filtration function of the scraper screen 7 decreases. At the same time, as the water pressure increases, when the force of the water flow on the scraper screen 7 is approximately equal to the elastic force of the elastic element, the scraper screen 7 moves away from the water inlet chamber 2 of the pipe. That is, a channel for water flow is formed between the scraper screen 7 and the water inlet chamber 2 of the pipe, and the filter screen 6 performs the filtration work of the water flow. By configuring the filter screen 6 structure as described above, when the valve at the inlet chamber 2 of the pipeline is initially opened, the debris being cleaned can enter the inner side of the scraper screen 7. The scraper screen 7 can temporarily collect the debris, preventing it from re-adhering to the filter screen 6, reducing the probability of the filter screen 6 becoming clogged again, increasing the service life of the filter screen 6, and reducing the frequency of cleaning the filter screen 6. Since the water flows in through the inlet chamber 2 of the pipeline and out through the outlet chamber 3 of the pipeline, the debris inside the scraper screen 7 is always subjected to the impact force of the water flow, and the debris inside the scraper screen 7 will not flow to the outside of the scraper screen 7.

[0032] The scraper screen 7 has scraper blades 16 at both ends that contact the filter screen 6. The scraper blades 16 are made of rubber. When the scraper screen 7 moves relative to the filter screen 6, the scraper blades 16 also move relative to the filter screen 6. At the same time, the scraper blades 16 further clean the debris on the surface of the filter screen 6. Since the scraper blades 16 are made of rubber, they will not damage the filter screen 6 when they come into contact with the filter screen 6.

[0033] See Figure 3 and Figure 7The valve cover 5 has a valve cover partition 17 fixedly connected to its inner side. The valve cover 5 has a receiving groove inside its inner side. The valve cover partition 17 is located inside the receiving groove. The periphery of the valve cover partition 17 fits against the periphery of the receiving groove to prevent water from overflowing from the periphery of the valve cover partition 17. The elastic base 9 is threadedly connected to the valve cover partition 17. The elastic base 9 is fixed to the elastic base 9, thereby realizing the fixing function of the elastic component. When it is necessary to clean the scraper screen 7, the valve cover 5 is separated from the filter body 4, the scraper screen 7 is taken out from the filter screen 6, and the debris inside the scraper screen 7 is cleaned.

[0034] See Figure 3 and Figure 8 Another method for fixing the elastic component is as follows: A valve cover partition 17 is fixedly connected to the inner side of the valve cover 5. A receiving groove is provided inside the valve cover 5, and the valve cover partition 17 is disposed inside the receiving groove. The periphery of the valve cover partition 17 fits snugly against the periphery of the receiving groove to prevent water from overflowing from around the valve cover partition 17. An elastic base 9 is fitted inside the valve cover partition 17, allowing the elastic base 9 to move relative to the valve cover partition 17, thus realizing the function of the elastic component moving relative to the valve cover partition 17. A plug 18 is provided on the valve cover 5 and threadedly connected to it. The plug 18 abuts against the elastic base 9 to prevent the elastic base 9 from moving relative to the valve cover partition 17. The valve cover 5 has a threaded hole, and the inner diameter of the threaded hole is larger than the diameter of the elastic base 9. When the scraper screen 7 needs to be cleaned, the valve cover 5 is separated from the filter body 4. After the valve cover 5 is opened, the elastic base 9 can pass through the threaded hole on the valve cover 5 to the outside of the valve cover 5. At the same time, the scraper screen 7 moves close to the valve cover 5, so that the scraper screen 7 moves to the outside of the filter screen 6. The scraper screen 7 moves to a position close to the valve cover 5, which makes it convenient for the staff to clean the scraper screen 7.

[0035] This invention, through the above structure, uses a scraper that slides relative to the filter screen inside. When the filter screen is clogged with debris, the switch valve on the inlet side of the pipeline is closed, while the pressure relief plug in the pressure relief hole is opened, reducing the pressure in the inlet chamber. When the pressure in the inlet chamber is less than the elastic force of the elastic component, the elastic component pushes the scraper to move closer to the inlet chamber. The relative movement between the scraper and the filter screen allows the scraper to remove debris from the filter screen, achieving a cleaning function, increasing the filter screen's lifespan, and reducing the frequency of cleaning.

[0036] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A pipe filter device having an automatic cleaning function, comprising a pipe main body, characterized by, The pipeline body is provided with a filter body for accommodating a filter device, the filter device is a ring-shaped filter screen, two ends of the pipeline body are respectively provided with a pipeline water inlet cavity and a pipeline water outlet cavity for passing fluid, the pipeline water inlet cavity and the pipeline water outlet cavity are mutually penetrated through the filter body, and the pipeline water inlet cavity is connected with a switch valve for controlling water flow on-off.

2. The pipe filtering device having an automatic cleaning function according to claim 1, wherein, The elastic assembly comprises an elastic base connected with the valve cover and a supporting rod connected with the scraper screen.

3. The pipe filter device having an automatic cleaning function according to claim 2, wherein, The inner side of the valve cover is provided with a valve cover partition plate fixedly connected therewith.

4. The pipe filter device having an automatic cleaning function according to claim 2, wherein, The inner side of the valve cover is provided with a valve cover partition plate fixedly connected therewith. The inner side of the valve cover is provided with a valve cover partition plate fixedly connected therewith. The valve cover is provided with a plug threadedly connected therewith and abutting against the elastic base, and a threaded hole is formed in the valve cover and has an inner diameter greater than a diameter of the elastic base.

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