Online self-cleaning leak-proof water filter

Abstract

This invention discloses an online self-cleaning anti-leakage filter, comprising a valve body, a valve cover, and a flow guide cavity. Its key feature is the inclusion of a filter cylinder, a hydrodynamic filter cylinder debris scraping device, and a switching valve. The filter cylinder is positioned between the valve body and the inlet channel of the inlet connecting pipe. A drain port is located at the lower end of the inlet channel, extending downwards and connecting to the switching valve. The inlet at the upper end of the filter cylinder is connected to the inlet connecting pipe, and its lower end is fixedly connected to a lower positioning seat fixed at the upper end of the drain port. The outlet on the side wall of the filter cylinder is connected to the flow guide cavity. The filter cylinder contains a hydrodynamic filter cylinder debris scraping device. This invention cleverly combines the double U-shaped structure of the filter and the anti-leakage valve into a single U-shaped structure, reducing fluid resistance by 60%, facilitating cleaning, and improving anti-leakage performance. It offers advantages such as compact structure, energy saving, self-balancing, no on-site debugging required, no on-site maintenance required, and convenient installation.

Description

Technical Field

[0001] This invention relates to the field of heating equipment technology, specifically to an online self-cleaning leak-proof filter. Background Technology

[0002] As is well known, existing heating pipelines accumulate scale and rust during long-term heating. If not cleaned regularly, these contaminants will build up and flow with hot water into the heating systems of users' homes, leading to insufficient heating and substandard room temperatures. To prevent leaks and property damage, anti-leakage valves are typically installed on the inlet pipe (41). Therefore, heating companies usually install a Y-type filter valve and an A-type anti-leakage valve on the inlet pipe of each user's home. However, this structure has several shortcomings: 1. Over time, impurities and other contaminants in the pipeline will clog the filter screen, increasing system resistance and potentially preventing hot water from entering the user's home altogether. 2. The Y-type filter is usually installed at an angle on the inlet pipe (41), resulting in high resistance and difficulty in cleaning as water passes through it. The A-type anti-leakage valve adds further resistance, increasing overall system resistance and wasting electricity. 3. Large equipment investment, many leakage points, and many potential safety hazards. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an online self-cleaning leak-proof water filter that is compact in structure, has low equipment investment cost, requires no maintenance, requires no disassembly or cleaning, has few leakage points, and is easy to install.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] An online self-cleaning leak-proof water filter includes a valve body 1, a valve cover 4, and a flow guide cavity 5. The valve body 1 has an inlet connection pipe 2 at its left end and an outlet connection pipe 3 at its right end. The upper end of the valve body 1 is fixedly connected to the valve cover 4, and the lower end is connected to the flow guide cavity. A valve core cavity 8 is provided between the valve cover 4 and the flow guide cavity 5. An leak-proof device is provided inside the valve core cavity 8. The filter body 1 also includes a filter screen cylinder, a hydrodynamic filter screen cylinder debris scraping device, and a switch valve. A filter screen cylinder 39 is provided between the valve body and the inlet channel of the inlet connection pipe 2. A drain port is provided at the lower end of the inlet channel, extending downwards and connecting to the switch valve. The inlet at the upper end of the filter screen cylinder 39 is connected to the inlet connection pipe 2, and the lower end is fixedly connected to a lower positioning seat 51 fixed at the upper end of the drain port. The outlet on the side wall of the filter screen cylinder 39 is connected to the flow guide cavity 5. A hydrodynamic filter screen cylinder debris scraping device is provided inside the filter screen cylinder 39. The hydrodynamic filter cylinder dirt scraping device includes a scraping part, an upper connecting part 48, and / or a lower connecting part. The scraping part has a scraper blade 61 on its side wall. The scraping part is arranged along the axial direction of the filter cylinder. The scraper blade 61 is linearly in rotatable contact with the inner wall of the filter cylinder under the impact of water flow. The upper end of the scraping part is hinged to the upper positioning seat at the upper end of the water inlet channel via the rotatable upper connecting part 48, and / or the lower end is hinged to the lower positioning seat via the rotatable lower connecting part. This facilitates the automatic removal of impurities attached to the inner wall of the filter cylinder after filtration by the scraping part rotating under the impact of water flow, thereby preventing the filter cylinder mesh from being blocked by dirt after long-term filtration and affecting heating. It achieves the effect of maintenance-free and disassembly-free cleaning, reduces pipeline resistance, reduces the number of installation and cleaning times, saves energy, and improves heating efficiency.

[0006] The present invention may have a sensor mounting hole on the valve body, which is connected to the inner cavity of the valve body. An inlet water temperature and pressure sensor is installed in the sensor mounting hole and is connected to the control unit to achieve high integration and convenient installation. The temperature and pressure sensor collects the pressure and inlet water temperature in the valve body and uploads the information to the control unit. The control unit then determines whether there is a leak in the user's indoor pipeline based on the collected pressure and temperature information, thereby realizing the function of online leak prevention.

[0007] The switching valve described in this invention can be an electromagnetic switching valve or an electric switching valve, so as to facilitate the automatic removal of impurities from the bottom of the filter cylinder 39 by controlling the switching valve through the control unit, thereby achieving the function of online automatic impurity removal.

[0008] The scraping part of the present invention may include at least one scraper, the end face of the scraper forming an angle with the water flow impact direction, and the side of the scraper being provided with a scraping blade 61;

[0009] When there are two or more scrapers, the upper ends of the two or more scrapers are fixedly connected by an upper connecting ring, and / or the lower ends are fixedly connected by a lower connecting ring. The upper end of the upper connecting ring is provided with an upper connecting part 48 that can be rotatably connected, and / or the lower end of the lower connecting ring is provided with a lower connecting part that can be rotatably connected, so as to further improve the scraping rate of the inner wall of the filter cylinder.

[0010] The scraping part of the present invention can also be a self-rotating water wheel. The blades of the self-rotating water wheel 45 are arranged axially, and the end face of the blades intersects with the water flow impact direction. The side wall of the blades of the self-rotating water wheel is provided with a scraping blade 61.

[0011] The scraping part of the present invention may also be composed of a rotating water wheel 45 and a scraper 46. The upper end of the rotating water wheel 45 is provided with at least one scraper 46. The scraper is axially arranged along the extension line of the rotating water wheel axis. One side wall or both side walls of the scraper are provided with scraping blades 61 for scraping the inner wall of the filter screen cylinder. The scraper is fixed to the end face of the rotating water wheel 45. The lower end of the rotating water wheel is provided with a rotatable lower connecting part, and the upper end of the scraper is provided with a rotatable upper connecting part 48, so as to facilitate the scraping blades 61 on the scraper to scrape the dirt on the inner wall of the filter screen cylinder by rotating the rotating water wheel under the impact of the water flow.

[0012] The scraper surface shape of the present invention is gradually twisted and deformed from the lower end to the upper end. The twisting direction of the scraper is the same as the rotation direction of the self-rotating water wheel blades, so as to increase the angle between the end face of the hanging plate and the water flow. By the water flow impacting the scraper and the self-rotating water wheel, the rotation speed of the self-rotating water wheel is accelerated, and the scraping rate of the inner wall of the filter screen cylinder is further improved.

[0013] The scraper blade 61 of the present invention can be made of a non-metallic material that is wear-resistant, corrosion-resistant, and highly elastic. The non-metallic material can be made of rubber, plastic, or composite material.

[0014] The scraper 61 described in this invention can be made of bristles to facilitate the automatic removal of dirt intercepted on the inner wall of the filter cylinder 39.

[0015] The switching valve described in this invention can be an electromagnetic switching valve or an electric switching valve, so as to facilitate the automatic removal of impurities from the bottom of the filter cylinder 39 by controlling the switching valve through the control unit, thereby achieving the function of online automatic impurity removal.

[0016] The present invention may provide a valve core stroke fine-tuning device between the valve cover 4 and the rectifier sleeve 7, which includes a screw 9 and a guide sleeve 16. The guide sleeve 16 is sleeved on the outside of the rectifier sleeve. The lower outer periphery of the guide sleeve 16 is provided with an outer limiting flange 19 and is sealed and fixedly connected to the inner wall of the anti-leakage cavity. The lower inner hole is a multi-faceted cylindrical inner hole 25, which cooperates with the outer multi-faceted cylinder provided on the outer wall of the rectifier sleeve to achieve axial sliding connection. The upper inner hole is sealed and connected to the drive shaft 26 to facilitate the upper end of the rectifier sleeve to be sealed again through the guide sleeve 16. The screw 9 is threadedly connected to the rectifier sleeve. The lower end of the screw 9 is fixedly connected to the valve stem 10, and the upper end is fixedly connected to the drive shaft 26. When the position of the rectifier sleeve needs to be adjusted, the drive shaft 26 is connected through a power source. The drive shaft 26 drives the screw 9 to rotate. The rectifier sleeve on the screw is axially displaced under the action of the outer multi-faceted cylinder, so as to achieve the function of quickly adjusting the position of the rectifier sleeve.

[0017] The leakage prevention device of the present invention includes a rectifier sleeve 7, a drive shaft, and a support plate 11. The rectifier sleeve 7 is located in the anti-leakage cavity at the center of the inlet connecting pipe 2 and the outlet connecting pipe 3, and the axis of the rectifier sleeve 7 is perpendicular to the axis of the inlet connecting pipe and the outlet connecting pipe of the valve body 1. The upper part of the inner cavity of the rectifier sleeve 7 is provided with a connecting hole section, and the lower part is provided with an inlet hole section. One side of the rectifier sleeve 7 is provided with an outlet through hole 12 to drain the water in the inlet hole section of the rectifier sleeve into the outlet. The upper outer wall of the rectifier sleeve 7 is sealed to the inner wall of the anti-leakage cavity, and the lower outer wall is sealed to the lower side wall of the outlet connecting pipe via a support plate 11. The support plate can be fixedly connected to the rectifier sleeve, or it can be fixedly connected to the side wall of the outlet connecting pipe. When fixedly connected to the rectifier sleeve, the upper end of the support plate 11 is fixedly connected to the partition plate 15 to facilitate the sealing and isolation of the guide cavity 5 and the outlet connecting pipe through the support plate. The valve stem 10 passes through the rectifier cavity and the valve core cavity 8, the upper end is fixedly connected to the drive shaft 26, and the lower end passes through the valve core cavity 8. The water inlet on the bottom surface is hinged to the valve stem insertion hole on the bottom surface of the guide cavity. A valve core 6 is slidably connected to the valve stem. After the drive shaft 26 is sealed and connected to the rectifier sleeve, its upper end extends upward into the valve cover cavity to facilitate rotation of the drive shaft by a power source. The lower part of the guide cavity 5 is connected to one side of the filter cavity 38. The partition 15 is located between the water inlet connecting pipe and the rectifier sleeve cavity. The outer periphery of the partition is sealed and fixedly connected to the inner cavity of the valve body to facilitate the flow of water in the water inlet connecting pipe into the filter device. The guide cavity 5 is connected to the valve core cavity 8 via the water inlet of the valve core cavity 8. The valve core 6 is located in the valve core cavity 8. The lower outer periphery of the valve core 6 is sealed and inserted into the lower inner wall of the valve core cavity 8. The upper end cover face is larger than the area of ​​the rectifier sleeve inlet hole section to achieve the function of preventing leakage. When water leaks in the heating user's room, the water flow velocity increases, and the water pushes the valve core 6 to move upward along the valve stem axis, quickly blocking the lower port of the rectifier sleeve inlet hole section, thus avoiding other property damage caused by water leakage in the user's room.

[0018] The present invention provides an upper limit inner boss 17 and a lower limit inner boss 18 axially on the inner wall of the anti-leakage cavity in the valve body 1. The upper limit inner boss 17 is located above the lower limit inner boss 18, and the outer limiting flange is located between the upper limit inner boss and the lower limit inner boss. The upper limit inner boss moves upward to limit the outer limiting flange, and the lower limit inner boss moves downward to limit the outer limiting flange.

[0019] The lower part of the valve core 6 described in this invention can be a cone, a hemisphere, or a cylinder, in order to facilitate the blocking of the water inlet of the rectifier sleeve.

[0020] The valve core stroke fine-tuning device of the present invention also includes an anti-rotation pin. The guide sleeve 16 is provided with an anti-rotation pin array at its lower end. The anti-rotation pin extends axially downward. The inner wall of the lower limit inner boss is provided with an anti-rotation pin limiting groove. The guide sleeve is hinged to the limiting groove 22 and positioned in the valve body to restrict the circumferential rotation of the guide sleeve 16, thereby achieving the functions of convenient disassembly and sealing positioning.

[0021] The present invention may also include a screw 9 locking device fitted on the drive shaft between the guide sleeve 16 and the valve cover 4, which includes a return spring 21, a locking sleeve, and a limiting small bushing. The valve cover inner hole is axially provided with a lockable straight tooth inner hole and a locking sleeve guide hole from top to bottom. A coaxial spur gear 33 is fixedly mounted on the upper end of the drive shaft 26. The locking sleeve, return spring 21, and limiting small bushing are sequentially fitted on the drive shaft 26 from top to bottom. The lower end of the limiting small bushing is fixedly connected to the guide sleeve 16. The inner hole of the limiting small bushing is sealed to the drive shaft 26 via a sealing ring. The lower end of the return spring 21 is sleeved on the limiting small bushing and abuts against the upper end face of the guide sleeve 16, while the upper end abuts against the top surface of the spring positioning hole of the locking sleeve 27. The structure of the locking sleeve is the same as that of the prior art, and will not be described in detail here. The locking sleeve is located between the valve cover and the spur gear 33. When locked, under the tension of the return spring 21, the locking sleeve abuts against the top surface of the locking sleeve guide hole of the valve cover via the top shoulder section, realizing the vertical pushing force. The outer circumference of the locking sleeve meshes and is fixed with the spur gear inner hole of the valve cover via the external gear ring section. The inner gear hole of the locking sleeve is engaged with the spur gear on the drive shaft 26. The meshing locks the sleeve onto the valve cover, achieving circumferential locking. In this invention, the meshing of the internal gear hole with the spur gear on the drive shaft can also be achieved by using a cylindrical multifaceted inner hole and a multi-faceted prism at the upper end of the drive shaft. Furthermore, the upper end face of the drive shaft 26 is equal to or lower than the upper end face of the valve cover, thus preventing unauthorized personnel from rotating the drive shaft 26. When adjusting the stroke of the valve core 6, the lock sleeve is pressed down. Under the compressed state of the return spring 21, the lock sleeve moves downwards. When the outer gear ring section of the lock sleeve separates from the spur gear inner hole of the valve cover, the locking is released, and the inner hole of the lock sleeve... The internal gear hole moves downward along the spur gear 33, exposing the upper end of the drive shaft 26. Then, the power source rotates, and the drive shaft 26 drives the screw 9 to rotate. The rectifier sleeve moves upward or downward under the guidance of the guide sleeve 16, thus achieving the function of adjusting the stroke of the valve core 6. After adjustment, the power source is released, and the locking sleeve resets under the tension of the return spring 21. At this time, the outer tooth ring section of the outer circumference of the locking sleeve meshes with the spur gear inner hole of the valve cover again, and the internal gear hole of the locking sleeve re-engages with the spur gear 33 on the upper part of the drive shaft 26, realizing the locking function.

[0022] The present invention provides a limiting shoulder 37 in the middle of the valve stem 10. When adjusting the water supply during the water supply process, the rotating screw 9 drives the rectifier sleeve to move upward along the guide sleeve, so that the lower end face of the limiting shoulder extends out of the lower end of the water inlet section of the rectifier sleeve, ensuring smooth water flow and facilitating water supply adjustment. After adjustment, the screw 9 is rotated in the opposite direction to move the rectifier sleeve downward along the guide sleeve, so that the lower end face of the limiting shoulder is higher than the lower end face of the axial flow sleeve, ensuring that when heating leaks, the valve core 6 moves upward through the valve stem 10 to block the water inlet section of the rectifier sleeve, thus preventing leakage.

[0023] The power source described in this invention can be electrically driven or manually driven. When manually rotated, the power source consists of a plug handle and a rotating handle. One end of the plug handle is fixedly connected to the rotating handle, and the other end has a plug hole axially located at its center. In use, the plug hole meshes with the spur gear 33 of the drive shaft 26. The depth of the plug hole is greater than the depth of the spur gear inner hole of the valve cover, so as to facilitate the quick adjustment of the stroke of the valve core 6 using a special key.

[0024] The present invention may provide a key positioning groove at the upper end of the lock sleeve, the diameter of which matches the outer diameter of the insertion handle, so as to achieve further rapid adjustment.

[0025] The present invention may also install a scale on the upper surface of the valve cover. The upper surface of the scale is provided with scale grooves, open mark grooves, and close mark grooves. One side of the upper surface of the lock sleeve is provided with a pointer groove for precise positioning. By using the value of the scale groove corresponding to the pointer groove, the stroke of the valve core 6 can be quickly determined.

[0026] This invention, by employing the aforementioned structure, cleverly combines the double U-shaped structure of the filter and the anti-leakage valve into a single U-shaped structure, reducing fluid resistance by 60%, facilitating cleaning, and improving the stability of the anti-leakage performance. It boasts advantages such as compact structure, energy saving (water, electricity, and heat), self-balancing, no on-site debugging required, no on-site maintenance required, and convenient installation.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 yes Figure 1 A schematic diagram of one embodiment of a hydrodynamic filter screen cylinder debris scraping device.

[0029] Figure 3 yes Figure 2 Top view.

[0030] Figure 4 yes Figure 1 A schematic diagram of the second embodiment of the water dynamic filter screen cylinder dirt scraping device.

[0031] Figure 5 This is a schematic diagram of the structure of an embodiment of the present invention.

[0032] Reference numerals: Valve body 1, Inlet connecting pipe 2, Outlet connecting pipe 3, Valve cover 4, Guide cavity 5, Valve core 6, Rectifying sleeve 7, Valve core cavity 8, Screw 9, Valve stem 10, Support plate 11, Partition plate 15, Guide sleeve 16, Outer limiting flange 19, Return spring 21, Anti-rotation pin 24, Multi-faceted cylindrical inner hole 25, Drive shaft 26, Spur gear 33, Limiting shoulder 37, Filter cavity 38, Filter screen cylinder 39, Return water pipe 42, Connecting pipe 43, Rotating water wheel 45, Unit scraper 46, Upper connecting ring 47, Upper connecting part 48, Lower connecting part 49, Upper positioning seat 50, Lower positioning seat 51, Scraper blade 61. Detailed Implementation

[0033] The present invention will now be described in conjunction with the accompanying drawings and embodiments.

[0034] As shown in the attached figure, an online self-cleaning anti-leakage water filter includes a valve body 1, a valve cover 4, and a flow guide cavity 5. The valve body 1 has an inlet connection pipe 2 at its left end and an outlet connection pipe 3 at its right end. The upper end of the valve body 1 is fixedly connected to the valve cover 4, and the lower end is connected to the flow guide cavity. A valve core cavity 8 is provided between the valve cover 4 and the flow guide cavity 5. An anti-leakage device is provided inside the valve core cavity 8. The filter body 1 is characterized by further including a filter screen cylinder, a hydrodynamic filter screen cylinder debris scraping device, and a switch valve. A filter screen cylinder 39 is provided between the valve body and the inlet channel of the inlet connection pipe 2. A drain port is provided at the lower end of the inlet channel, extending downwards and connecting to the switch valve. The inlet at the upper end of the filter screen cylinder 39 is connected to the inlet connection pipe 2, and the lower end is fixedly connected to a lower positioning seat 51 fixed at the upper end of the drain port. The outlet on the side wall of the filter screen cylinder 39 is connected to the flow guide cavity 5. A hydrodynamic filter screen cylinder debris scraping device is provided inside the filter screen cylinder 39. The hydrodynamic filter cylinder dirt scraping device includes a scraping part, an upper connecting part 48, and / or a lower connecting part. The scraping part has a scraper blade 61 on its side wall. The scraping part is arranged along the axial direction of the filter cylinder. The scraper blade 61 is linearly in rotatable contact with the inner wall of the filter cylinder under the impact of water flow. The upper end of the scraping part is hinged to the upper positioning seat at the upper end of the water inlet channel via the rotatable upper connecting part 48, and / or the lower end is hinged to the lower positioning seat via the rotatable lower connecting part. This facilitates the automatic removal of impurities attached to the inner wall of the filter cylinder after filtration by the scraping part rotating under the impact of water flow, thereby preventing the filter cylinder mesh from being blocked by dirt after long-term filtration and affecting heating. It achieves the effect of maintenance-free and disassembly-free cleaning, reduces pipeline resistance, reduces the number of installation and cleaning times, saves energy, and improves heating efficiency.

[0035] The present invention may have a sensor mounting hole on the valve body, which is connected to the inner cavity of the valve body. An inlet water temperature and pressure sensor is installed in the sensor mounting hole and is connected to the control unit to achieve high integration and convenient installation. The temperature and pressure sensor collects the pressure and inlet water temperature in the valve body and uploads the information to the control unit. The control unit then determines whether there is a leak in the user's indoor pipeline based on the collected pressure and temperature information, thereby realizing the function of online leak prevention.

[0036] The switching valve described in this invention can be an electromagnetic switching valve or an electric switching valve, so as to facilitate the automatic removal of impurities from the bottom of the filter cylinder 39 by controlling the switching valve through the control unit, thereby achieving the function of online automatic impurity removal.

[0037] The scraping part of the present invention may include at least one scraper, the end face of the scraper forming an angle with the water flow impact direction, and the side of the scraper being provided with a scraping blade 61;

[0038] When there are two or more scrapers, the upper ends of the two or more scrapers are fixedly connected by an upper connecting ring, and / or the lower ends are fixedly connected by a lower connecting ring. The upper end of the upper connecting ring is hinged to the upper positioning seat via a rotatable upper connecting part 48, and / or the lower end of the lower connecting ring is hinged to the lower positioning seat via a rotatable lower connecting part, so as to further improve the scraping rate of the inner wall of the filter screen cylinder.

[0039] The scraping part of the present invention can also be a self-rotating water wheel. The blades of the self-rotating water wheel 45 are arranged axially, and the end face of the blades intersects with the water flow impact direction. The side wall of the blades of the self-rotating water wheel is provided with a scraping blade 61.

[0040] The scraping part of the present invention may also be composed of a rotating water wheel 45 and a scraper 46. The upper end of the rotating water wheel 45 is provided with at least one scraper 46. The scraper is axially arranged along the extension line of the rotating water wheel axis. One side wall or both side walls of the scraper are provided with scraping blades 61 for scraping the inner wall of the filter screen cylinder. The scraper is fixed on the end face of the rotating water wheel 45. The lower end of the rotating water wheel is hinged to the lower positioning seat via a rotatable lower connecting part. The upper end of the scraper is hinged to the upper positioning seat via a rotatable upper connecting part 48, so as to facilitate the scraping blades 61 on the scraper to scrape the dirt on the inner wall of the filter screen cylinder by rotating the rotating water wheel under the impact of the water flow.

[0041] The scraper surface shape of the present invention is gradually twisted and deformed from the lower end to the upper end. The twisting direction of the scraper is the same as the rotation direction of the self-rotating water wheel blades, so as to increase the angle between the end face of the hanging plate and the water flow. By the water flow impacting the scraper and the self-rotating water wheel, the rotation speed of the self-rotating water wheel is accelerated, and the scraping rate of the inner wall of the filter screen cylinder is further improved.

[0042] The scraper blade 61 of the present invention can be made of a non-metallic material that is wear-resistant, corrosion-resistant, and highly elastic. The non-metallic material can be made of rubber, plastic, or composite material.

[0043] The scraper 61 described in this invention can be made of bristles to facilitate the automatic removal of dirt intercepted on the inner wall of the filter cylinder 39.

[0044] The switching valve described in this invention can be an electromagnetic switching valve or an electric switching valve, so as to facilitate the automatic removal of impurities from the bottom of the filter cylinder 39 by controlling the switching valve through the control unit, thereby achieving the function of online automatic impurity removal.

[0045] The present invention may provide a valve core stroke fine-tuning device between the valve cover 4 and the rectifier sleeve 7, which includes a screw 9 and a guide sleeve 16. The guide sleeve 16 is sleeved on the outside of the rectifier sleeve. The lower outer periphery of the guide sleeve 16 is provided with an outer limiting flange 19 and is sealed and fixedly connected to the inner wall of the anti-leakage cavity. The lower inner hole is a multi-faceted cylindrical inner hole 25, which cooperates with the outer multi-faceted cylinder provided on the outer wall of the rectifier sleeve to achieve axial sliding connection. The upper inner hole is sealed and connected to the drive shaft 26 to facilitate the upper end of the rectifier sleeve to be sealed again through the guide sleeve 16. The screw 9 is threadedly connected to the rectifier sleeve. The lower end of the screw 9 is fixedly connected to the valve stem 10, and the upper end is fixedly connected to the drive shaft 26. When the position of the rectifier sleeve needs to be adjusted, the drive shaft 26 is connected through a power source. The drive shaft 26 drives the screw 9 to rotate. The rectifier sleeve on the screw is axially displaced under the action of the outer multi-faceted cylinder, so as to achieve the function of quickly adjusting the position of the rectifier sleeve.

[0046] The leakage prevention device of the present invention includes a rectifier sleeve 7, a drive shaft, and a support plate 11. The rectifier sleeve 7 is located in the anti-leakage cavity at the center of the inlet connecting pipe 2 and the outlet connecting pipe 3, and the axis of the rectifier sleeve 7 is perpendicular to the axis of the inlet connecting pipe and the outlet connecting pipe of the valve body 1. The upper part of the inner cavity of the rectifier sleeve 7 is provided with a connecting hole section, and the lower part is provided with an inlet hole section. One side of the rectifier sleeve 7 is provided with an outlet through hole 12 to drain the water in the inlet hole section of the rectifier sleeve into the outlet. The upper outer wall of the rectifier sleeve 7 is sealed to the inner wall of the anti-leakage cavity, and the lower outer wall is sealed to the lower side wall of the outlet connecting pipe via a support plate 11. The support plate can be fixedly connected to the rectifier sleeve, or it can be fixedly connected to the side wall of the outlet connecting pipe. When fixedly connected to the rectifier sleeve, the upper end of the support plate 11 is fixedly connected to the partition plate 15 to facilitate the sealing and isolation of the guide cavity 5 and the outlet connecting pipe through the support plate. The valve stem 10 passes through the rectifier cavity and the valve core cavity 8, the upper end is fixedly connected to the drive shaft 26, and the lower end passes through the valve core cavity 8. The water inlet on the bottom surface is hinged to the valve stem insertion hole on the bottom surface of the guide cavity. A valve core 6 is slidably connected to the valve stem. After the drive shaft 26 is sealed and connected to the rectifier sleeve, its upper end extends upward into the valve cover cavity to facilitate rotation of the drive shaft by a power source. The lower part of the guide cavity 5 is connected to one side of the filter cavity 38. The partition 15 is located between the water inlet connecting pipe and the rectifier sleeve cavity. The outer periphery of the partition is sealed and fixedly connected to the inner cavity of the valve body to facilitate the flow of water in the water inlet connecting pipe into the filter device. The guide cavity 5 is connected to the valve core cavity 8 via the water inlet of the valve core cavity 8. The valve core 6 is located in the valve core cavity 8. The lower outer periphery of the valve core 6 is sealed and inserted into the lower inner wall of the valve core cavity 8. The upper end cover face is larger than the area of ​​the rectifier sleeve inlet hole section to achieve the function of preventing leakage. When water leaks in the heating user's room, the water flow velocity increases, and the water pushes the valve core 6 to move upward along the valve stem axis, quickly blocking the lower port of the rectifier sleeve inlet hole section, thus avoiding other property damage caused by water leakage in the user's room.

[0047] The present invention provides an upper limit inner boss 17 and a lower limit inner boss 18 axially on the inner wall of the anti-leakage cavity in the valve body 1. The upper limit inner boss 17 is located above the lower limit inner boss 18, and the outer limiting flange is located between the upper limit inner boss and the lower limit inner boss. The upper limit inner boss moves upward to limit the outer limiting flange, and the lower limit inner boss moves downward to limit the outer limiting flange.

[0048] The lower part of the valve core 6 described in this invention can be a cone, a hemisphere, or a cylinder, in order to facilitate the blocking of the water inlet of the rectifier sleeve.

[0049] The valve core stroke fine-tuning device of the present invention also includes an anti-rotation pin. The guide sleeve 16 is provided with an anti-rotation pin array at its lower end. The anti-rotation pin extends axially downward. The inner wall of the lower limit inner boss is provided with an anti-rotation pin limiting groove. The guide sleeve is hinged to the limiting groove 22 and positioned in the valve body to restrict the circumferential rotation of the guide sleeve 16, thereby achieving the functions of convenient disassembly and sealing positioning.

[0050] The present invention may also include a screw 9 locking device fitted on the drive shaft between the guide sleeve 16 and the valve cover 4, which includes a return spring 21, a locking sleeve, and a limiting small bushing. The valve cover inner hole is axially provided with a lockable straight tooth inner hole and a locking sleeve guide hole from top to bottom. A coaxial spur gear 33 is fixedly mounted on the upper end of the drive shaft 26. The locking sleeve, return spring 21, and limiting small bushing are sequentially fitted on the drive shaft 26 from top to bottom. The lower end of the limiting small bushing is fixedly connected to the guide sleeve 16. The inner hole of the limiting small bushing is sealed to the drive shaft 26 via a sealing ring. The lower end of the return spring 21 is sleeved on the limiting small bushing and abuts against the upper end face of the guide sleeve 16, while the upper end abuts against the top surface of the spring positioning hole of the locking sleeve 27. The structure of the locking sleeve is the same as that of the prior art, and will not be described in detail here. The locking sleeve is located between the valve cover and the spur gear 33. When locked, under the tension of the return spring 21, the locking sleeve abuts against the top surface of the locking sleeve guide hole of the valve cover via the top shoulder section, realizing the vertical pushing force. The outer circumference of the locking sleeve meshes and is fixed with the spur gear inner hole of the valve cover via the external gear ring section. The inner gear hole of the locking sleeve is engaged with the spur gear on the drive shaft 26. The meshing locks the sleeve onto the valve cover, achieving circumferential locking. In this invention, the meshing of the internal gear hole with the spur gear on the drive shaft can also be achieved by using a cylindrical multifaceted inner hole and a multi-faceted prism at the upper end of the drive shaft. Furthermore, the upper end face of the drive shaft 26 is equal to or lower than the upper end face of the valve cover, thus preventing unauthorized personnel from rotating the drive shaft 26. When adjusting the stroke of the valve core 6, the lock sleeve is pressed down. Under the compressed state of the return spring 21, the lock sleeve moves downwards. When the outer gear ring section of the lock sleeve separates from the spur gear inner hole of the valve cover, the locking is released, and the inner hole of the lock sleeve... The internal gear hole moves downward along the spur gear 33, exposing the upper end of the drive shaft 26. Then, the power source rotates, and the drive shaft 26 drives the screw 9 to rotate. The rectifier sleeve moves upward or downward under the guidance of the guide sleeve 16, thus achieving the function of adjusting the stroke of the valve core 6. After adjustment, the power source is released, and the locking sleeve resets under the tension of the return spring 21. At this time, the outer tooth ring section of the outer circumference of the locking sleeve meshes with the spur gear inner hole of the valve cover again, and the internal gear hole of the locking sleeve re-engages with the spur gear 33 on the upper part of the drive shaft 26, realizing the locking function.

[0051] The present invention provides a limiting shoulder 37 in the middle of the valve stem 10. When adjusting the water supply during the water supply process, the rotating screw 9 drives the rectifier sleeve to move upward along the guide sleeve, so that the lower end face of the limiting shoulder extends out of the lower end of the water inlet section of the rectifier sleeve, ensuring smooth water flow and facilitating water supply adjustment. After adjustment, the screw 9 is rotated in the opposite direction to move the rectifier sleeve downward along the guide sleeve, so that the lower end face of the limiting shoulder is higher than the lower end face of the axial flow sleeve, ensuring that when heating leaks, the valve core 6 moves upward through the valve stem 10 to block the water inlet section of the rectifier sleeve, thus preventing leakage.

[0052] The power source described in this invention can be electrically driven or manually driven. When manually rotated, the power source consists of a plug handle and a rotating handle. One end of the plug handle is fixedly connected to the rotating handle, and the other end has a plug hole axially located at its center. In use, the plug hole meshes with the spur gear 33 of the drive shaft 26. The depth of the plug hole is greater than the depth of the spur gear inner hole of the valve cover, so as to facilitate the quick adjustment of the stroke of the valve core 6 using a special key.

[0053] The present invention may provide a key positioning groove at the upper end of the lock sleeve, the diameter of which matches the outer diameter of the insertion handle, so as to achieve further rapid adjustment.

[0054] The present invention may also install a scale on the upper surface of the valve cover. The upper surface of the scale is provided with scale grooves, open mark grooves, and close mark grooves. One side of the upper surface of the lock sleeve is provided with a pointer groove for precise positioning. By using the value of the scale groove corresponding to the pointer groove, the stroke of the valve core 6 can be quickly determined.

[0055] During installation, the inlet and outlet pipes of the leak-proof filter cylinder can be connected to the inlet pipe 41, eliminating the need for a secondary connection to the inlet pipe 41, greatly simplifying the installation and significantly improving work efficiency. During water supply, water enters the filter cylinder through the inlet pipe, then enters the valve body, and flows into the user's room through the leak-proof device and outlet pipe inside the valve body, ensuring the safety of the water supply to the user's room.

[0056] In this invention, when adjusting the stroke of the anti-leakage filter valve core, the operator holds the rotating handle of a special key and inserts the insertion handle into the key positioning groove. This allows the insertion hole at the lower end of the insertion handle to directly mesh with the spur gear. Then, the locking sleeve is pressed down, and the locking sleeve moves downward under the compressed state of the return spring 21. When the outer toothed section of the outer circumference of the locking sleeve separates from the spur gear inner hole of the valve cover, the circumferential locking of the locking sleeve is released. Rotating the special key causes the drive shaft 26 to rotate, which in turn drives the screw 9 to rotate. Under the guidance of the sealing sleeve 16, the rectifier sleeve moves upward or downward. This allows for adjustment of the valve core stroke. When the valve core descends 1mm, the operator simply needs to rotate the special key 30 degrees, i.e., the pointer groove on the lock sleeve points to the scale groove 30 degrees. After adjustment, pull the special key upwards, and the lock sleeve resets under the tension of the return spring 21. At this time, the outer toothed ring section of the outer circumference of the lock sleeve meshes with the straight toothed inner hole of the valve cover again, and the inner toothed hole of the lock sleeve meshes with the spur gear on the upper part of the drive shaft 26 again, preventing the screw 9 from rotating due to external force and / or the driving force of the fluid, thus achieving the locking effect.

[0057] When adjusting the water supply during the water supply process, the screw 9 drives the valve stem 10 to move downward, so that the lower end face of the limiting shoulder extends out of the lower end of the rectifier sleeve inlet section, ensuring smooth water flow and facilitating water supply adjustment. After adjustment, the screw 9 is rotated in the opposite direction to move the valve stem 10 upward, so that the lower end face of the limiting shoulder moves up into the axial flow sleeve, ensuring that when heating leaks, the valve core blocks the inlet section of the rectifier sleeve by moving the valve stem 10 upward, thus preventing leakage.

[0058] During the heating process, impurities and dirt in the water inlet pipe are filtered through the filter screen cylinder to prevent them from entering the heating pipes in the user's room. The scraping part in the filter screen dirt removal device inside the filter screen cylinder rotates automatically under the impact of the water flow. The scraper blade 61 on the side of the rotating scraping part automatically scrapes off the dirt hanging on the inner wall of the filter screen cylinder, which greatly improves the temperature of the heating pipes in the user's room.

[0059] The control unit calculates the pressure difference value inside the house by receiving the inlet water pressure information uploaded by the temperature and pressure sensor and the return water pressure information uploaded by the return water pressure sensor. When the pressure difference gradually decreases and is less than the set value, it indicates that there is too much dirt in the filter. At this time, the control unit will instruct the electric drain valve to drain the dirt, so that the scraped dirt flows into the return water pipe through the switch valve, connecting pipe and one-way three-way valve, and is discharged through the return water pipe 42. The one-way three-way valve 44 prevents the dirt from flowing back into the user's pipe.

[0060] When the pressure difference gradually decreases and is less than the set value, it indicates that there is too much dirt in the filter screen of the online self-cleaning anti-leakage filter. At this time, the control unit will instruct the switch valve to discharge the dirt, so that the scraped dirt flows into the return water pipe through the switch valve, connecting pipe and one-way three-way valve, is discharged through the return water pipe 42, and prevents the dirt from flowing back into the user's pipe through the one-way three-way valve 44.

[0061] When the differential pressure value calculated by the control unit exceeds the set value, it indicates that the sewage discharge is over, and the control unit will instruct the switch valve to close automatically.

[0062] When the control unit detects that the differential pressure value is suddenly too low (close to zero), it determines that there is a water leakage in the house, and the control unit instructs the intelligent flow regulating valve to close automatically.

[0063] Once the leak point is eliminated, for example, if a user releases water from the pipes inside their home, and then closes the valves in the indoor pipes, the intelligent flow regulating valve and the online self-cleaning leak-proof filter will automatically reset, restoring normal heating. If the pressure difference remains too low (or close to zero) for a set period of time, it indicates that normal heating cannot be restored. The control unit will then upload this information to the central heating station via the network, triggering an alarm in the central heating station system to indicate that a leak has occurred and on-site repair is required, such as in the case of a sudden burst of indoor pipes when no one is home.

[0064] This invention, by employing the aforementioned structure, cleverly combines the double U-shaped structure of the filter and the anti-leakage valve into a single U-shaped structure, reducing fluid resistance by 60%, facilitating cleaning, and improving the stability of the anti-leakage performance. It boasts advantages such as compact structure, energy saving (water, electricity, and heat), self-balancing, no on-site debugging required, no on-site maintenance required, and convenient installation.

[0065] Definition of terms: In this invention, "online" means within the pipeline route and does not require disassembly of the pipeline.

[0066] "Online self-cleaning" refers to self-cleaning within pipelines without the need to disassemble pipeline valves.

Claims

1. An online self-cleaning leak-proof water filter, comprising a valve body, a valve cover, and a flow guide cavity, wherein the valve body has an inlet connecting pipe at its left end and an outlet connecting pipe at its right end; the upper end of the valve body is fixedly connected to the valve cover, and the lower end is connected to the flow guide cavity; a valve core cavity is provided between the valve cover and the flow guide cavity; and a leak-proof device is provided within the valve core cavity, characterized in that... It also includes a filter cylinder, a hydrodynamic filter cylinder debris scraping device, and a switch valve. The filter cylinder is installed between the valve body and the inlet channel of the inlet connecting pipe. A drain port is located at the lower end of the inlet channel, extending downwards and connecting to the switch valve. The inlet at the upper end of the filter cylinder is connected to the inlet connecting pipe, and its lower end is fixedly connected to a lower positioning seat fixed at the upper end of the drain port. The outlet on the side wall of the filter cylinder is connected to a guide cavity. A hydrodynamic filter cylinder debris scraping device is installed inside the filter cylinder. This device includes a scraping section, an upper connecting section, and / or a lower connecting section. A scraping blade is provided on the side wall of the scraping section, which is arranged axially along the filter cylinder. The scraping part is rotatably contacted by the impact of water flow on the inner wall of the filter screen. The upper end of the scraping part is hinged to the upper positioning seat at the upper end of the water inlet channel via a rotatably connected upper connecting part, and / or the lower end is hinged to the lower positioning seat via a rotatably connected lower connecting part. The valve body is provided with a sensor mounting hole, which is connected to the inner cavity of the valve body. An inlet water temperature and pressure sensor is installed in the sensor mounting hole. The inlet water temperature and pressure sensor is connected to the control unit. The inlet water temperature and pressure sensor collects the pressure and inlet water temperature in the valve body and uploads the above information to the control unit. The control unit then determines whether there is a leak in the user's indoor pipeline based on the collected pressure and temperature information, thereby realizing online leak prevention.

2. The online self-cleaning leak-proof filter according to claim 1, characterized in that... The switching valve is either an electromagnetic switching valve or an electric switching valve.

3. The online self-cleaning leak-proof filter according to claim 2, characterized in that... The scraping part includes at least one scraper, the end face of the scraper forms an angle with the water flow impact direction, and the side of the scraper is provided with a scraping blade; Alternatively, when there are two or more scrapers, the upper ends of the two or more scrapers are fixedly connected by an upper connecting ring, and / or the lower ends are fixedly connected by a lower connecting ring. The upper connecting ring has a rotatable upper connecting part at its upper end, and / or the lower connecting ring has a rotatable lower connecting part at its lower end.

4. The online self-cleaning leak-proof filter according to claim 2, characterized in that... The scraping part is a self-rotating water wheel, the blades of the self-rotating water wheel are axially arranged, the end face of the blades intersects the water flow impact direction, and the side wall of the blades of the self-rotating water wheel is provided with scraping blades.

5. An online self-cleaning leak-proof filter according to claim 2, characterized in that... The scraping section consists of a rotating water wheel and a scraper. The upper end of the rotating water wheel is provided with at least one scraper. The scraper is axially arranged along the extension line of the rotating water wheel axis. One or both sides of the scraper are provided with scraping blades for scraping the inner wall of the filter screen cylinder. The scraper is fixed to the end face of the rotating water wheel. The lower end of the rotating water wheel is provided with a rotatable lower connecting part, and the upper end of the scraper is provided with a rotatable upper connecting part.

6. An online self-cleaning leak-proof filter according to claim 3, 4, or 5, characterized in that... The scraper blade is made of a non-metallic material that is wear-resistant, corrosion-resistant, and highly elastic.

7. An online self-cleaning leak-proof filter according to claim 6, characterized in that... The scraper blade is made of brush bristles.

8. An online self-cleaning leak-proof filter according to claim 3 or 5, characterized in that... The surface shape of the scraper gradually twists and deforms from the bottom to the top, and the twisting direction of the scraper is the same as the rotation direction of the self-rotating water turbine blades.

9. An online self-cleaning leak-proof filter according to claim 1, 2, 3, 4, 5, or 7, characterized in that... A valve core stroke fine-tuning device is provided between the valve cover and the rectifier sleeve, which includes a screw and a guide sleeve. The guide sleeve is sleeved outside the rectifier sleeve. The lower outer circumference of the guide sleeve is provided with an outer limiting flange that is sealed and fixedly connected to the inner wall of the anti-leakage cavity. The lower inner hole is a multi-faceted cylindrical inner hole, which cooperates with the outer multi-faceted cylinder provided on the outer wall of the rectifier sleeve to achieve axial sliding connection. The upper inner hole is sealed and connected to the drive shaft. The screw is threadedly connected to the rectifier sleeve. The lower end of the screw is fixedly connected to the valve stem, and the upper end is fixedly connected to the drive shaft.

10. An online self-cleaning leak-proof filter according to claim 9, characterized in that... The anti-leakage device includes a rectifier sleeve, a drive shaft, and a support plate. The rectifier sleeve is located in the anti-leakage cavity at the center of the inlet and outlet connecting pipes, and the axis of the rectifier sleeve is perpendicular to the axis of the inlet and outlet connecting pipes of the valve body. The upper part of the inner cavity of the rectifier sleeve has a connecting hole section, and the lower part has an inlet hole section. One side of the rectifier sleeve has an outlet through hole for draining water from the inlet hole section of the rectifier sleeve into the outlet. The upper outer wall of the rectifier sleeve is sealed to the inner wall of the anti-leakage cavity, and the lower outer wall is sealed to the lower side wall of the outlet connecting pipe via the support plate. The support plate is fixedly connected to the rectifier sleeve, or fixedly connected to the side wall of the outlet connecting pipe. When fixedly connected to the rectifier sleeve, the upper end of the support plate is fixedly connected to the partition plate. The valve stem passes through the rectifier sleeve. The flow chamber and valve core chamber are fixedly connected at the upper end to the drive shaft, and the lower end passes through the water inlet on the bottom surface of the valve core chamber and is hinged to the valve stem insertion hole on the bottom surface of the flow guide chamber. The valve core is slidably connected to the valve stem. After the drive shaft is sealed and connected to the rectifier sleeve, the upper end extends upward into the valve cover chamber. The lower part of the flow guide chamber is connected to one side of the filter chamber. The partition is located between the water inlet connection pipe and the rectifier sleeve chamber. The outer periphery of the partition is sealed and fixedly connected to the inner cavity of the valve body. The flow guide chamber is connected to the valve core chamber through the water inlet of the valve core chamber. The valve core is located in the valve core chamber. The lower outer periphery of the valve core is sealed and inserted into the lower inner wall of the valve core chamber. The upper end covering end face is larger than the area of ​​the water inlet section of the rectifier sleeve.

11. An online self-cleaning leak-proof filter according to claim 10, characterized in that... The lower part of the valve core is conical, hemispherical, or cylindrical.

12. An online self-cleaning leak-proof filter according to claim 11, characterized in that... A screw locking device is fitted on the drive shaft between the guide sleeve and the valve cover.

13. An online self-cleaning leak-proof filter according to claim 10, 11, or 12, characterized in that... The valve stem has a limiting shoulder in the middle. When adjusting the water supply during the water supply process, the rotating screw drives the rectifier sleeve to move upward along the guide sleeve, so that the lower end face of the limiting shoulder extends out of the lower end of the water inlet section of the rectifier sleeve, ensuring smooth water flow. After the adjustment is completed, the screw is rotated in the opposite direction to move the rectifier sleeve downward along the guide sleeve, so that the lower end face of the limiting shoulder is higher than the lower end face of the axial flow sleeve, so that when the heating leaks, the valve core blocks the water inlet section of the rectifier sleeve by moving the valve stem upward.

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