Anti-blocking filtering device for heating

Abstract

The present invention discloses an anti-clogging filtering device for heating, which belongs to the technical field of pipeline anti-clogging. Through the provided filtering mechanism, when it is necessary to clean impurities attached to the filter screen, the movable baffle is adjusted to cover the outer cylinder. At this time, water can only enter the inner cylinder through the water inlet of the four-way pipe and further flow into the diversion channel. An arc-shaped water film covering the filter screen is sprayed out from the diversion channel, and the filter screen is flushed, so that impurities attached to the inner side of the filter screen are returned to the outer cylinder under the influence of the water flow, and are discharged from the outer cylinder through the drain port opened at the bottom of the outer cylinder and reach the slag discharge port of the four-way pipe, thereby achieving the purpose of quickly removing impurities intercepted in the four-way pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline anti-blocking, and in particular to an anti-blocking filtering device for heating. Background Art

[0002] The anti-blocking filter device for heating is a key device used in heating systems to prevent pipe blockage and ensure heating effects. It filters out impurities such as mud, welding slag, and rust in the heating system to prevent these impurities from accumulating in the pipes, causing pipe blockage and affecting the heating effect.

[0003] The filter device is usually composed of a filter box or filter cartridge, with a filter screen or other filter media installed inside to intercept impurities. The two ends are connected to the water supply and return pipes of the heating system. When the heating hot water passes through the filter device, impurities in the water are intercepted by the filter screen or other filter media, and the clean water continues to circulate in the pipes.

[0004] When maintaining the existing anti-clogging equipment, it is necessary to close the heater water inlet valve and return valve, open the bleed valve of the manifold to release gas and moisture, use a wrench to unscrew the filter cover or plug, and remove the filter for cleaning;

[0005] However, in actual use, since modern heating systems generally intercept particles such as mud and sand through filtering devices before replenishing water, and use plastic composite pipes to avoid the generation of metal debris and control the amount of impurities entering the heating system, the impurities on the filter are of a single type and not easy to deposit. When the intercepted objects are easy to clean, removing the filter from the equipment for cleaning is too cumbersome. Summary of the Invention

[0006] The purpose of the present invention is to solve the problem that the number of impurities in modern heating systems is reduced, the impurities on the filter are of a single type and not easy to deposit, and the method of removing the filter from the equipment for cleaning is too cumbersome when the intercepted objects are easy to clean. A blocking-proof filter device for heating is proposed.

[0007] In order to achieve the above purpose, the present invention adopts the following technology: a heating anti-blocking filter device:

[0008] The connecting pipe includes a four-way pipe provided with a water inlet, a water outlet, a slag discharge port and an installation port, valves are installed at the water inlet and the water outlet, a filtering mechanism is installed in the four-way pipe, and the filtering mechanism includes an outer cylinder and an inner cylinder nested in the outer cylinder, and the inner cylinder is connected to the outer cylinder through a provided guide channel;

[0009] The outer cylinder is provided with a filter screen for filtering impurities and a drain outlet for discharging impurities, and a plurality of movable baffles are movably provided inside the outer cylinder for blocking the water inlet end of either the outer cylinder or the inner cylinder;

[0010] When the inner cylinder is closed, water flows into the outer cylinder and is filtered through the filter and then introduced into the valve. When the outer cylinder is closed, water flows into the inner cylinder and flushes the filter through the diversion channel, carrying impurities intercepted on the filter into the outer cylinder and reaching the slag discharge port of the four-way pipe through the drain port.

[0011] As a further description of the above technology, an anti-clogging filter device for heating:

[0012] The filtering mechanism also includes a mounting seat arranged on the four-way pipe mounting port and a slag discharge pipe on the slag discharge port. The outer tube and the inner tube are fixedly mounted on the mounting seat. The slag discharge pipe receives water discharged from the drain port and discharges it out of the four-way pipe through the strip slag discharge holes opened on the surface.

[0013] As a further description of the above technology, an anti-clogging filter device for heating:

[0014] A fixed baffle is provided on the inner wall of the outer cylinder. A cavity is opened on the fixed baffle for the movable baffle to move. The movable baffle slides into the cavity and is combined with the fixed baffle to form an annular plate that closes the water inlet end of the outer cylinder.

[0015] As a further description of the above technology, an anti-clogging filter device for heating:

[0016] The diversion channel is arranged in an inclined shape and is provided with a water outlet having the same curvature as the outer wall of the outer cylinder. Water is sprayed out through the diversion channel to form an arc-shaped water film covering the filter screen.

[0017] As a further description of the above technology, an anti-clogging filter device for heating:

[0018] The movable baffle slides through a switching mechanism, which includes a plurality of mounting frames arranged on the inner wall of the four-way pipe, the mounting frames are provided with slide grooves, and a slider is slidably embedded in the slide grooves;

[0019] And, a turntable arranged in the mounting seat is rotated, the turntable is provided with guide grooves having the same number as the slider, and a first connecting rod connecting the movable baffle and the slider is provided through the guide groove.

[0020] As a further description of the above technology, an anti-clogging filter device for heating:

[0021] The first connecting rod is detachably mounted on the slider, and the connection between the slider and the first connecting rod is released when the mounting seat is separated from the cross-tube.

[0022] As a further description of the above technology, an anti-clogging filter device for heating:

[0023] The mounting seat is also provided with an adjustment mechanism for controlling the rotation of the turntable, the adjustment mechanism comprising a first mounting cavity arranged transversely in the middle of the mounting seat, and the inner cylinder is blocked when the outer edge of the first mounting cavity is tightly fitted with the movable baffle;

[0024] A second mounting cavity is provided in the middle of the first mounting cavity and vertically passes through the inner cylinder and the outer cylinder. A first rotating rod and a second rotating rod connected to the turntable are rotatably provided in the first mounting cavity and the second mounting cavity. The first rotating rod and the second rotating rod are respectively provided with a first bevel gear and a second bevel gear that mesh with each other.

[0025] As a further description of the above technology, an anti-clogging filter device for heating:

[0026] A second connecting rod connected to the second rotating rod is rotatably provided in the slag discharge pipe, and the bottom of the second connecting rod is connected to a rotating knob rotatably embedded in the bottom of the slag discharge pipe;

[0027] A rotating cavity for the second connecting rod to pass through is provided in the middle of the inner wall of the slag discharge pipe. A torsion spring is wound around the surface of the second connecting rod located in the rotating cavity, and both ends of the torsion spring are respectively connected to the inner wall of the rotating cavity.

[0028] As a further description of the above technology, an anti-clogging filter device for heating:

[0029] The four-way pipe is also provided with an opening and closing mechanism which is controlled by turning a knob. The opening and closing mechanism includes a first gate provided at the water outlet of the four-way pipe and a second gate provided at the slag discharge port. When either one of the first gate and the second gate is opened, the other is closed.

[0030] As a further description of the above technology, an anti-clogging filter device for heating:

[0031] The first gate includes a first movable plate rotatably embedded at the water outlet and a first fixed plate fixedly arranged and cooperating with the first movable plate, and a third connecting rod connected to the second rotating rod is installed in the middle of the first movable plate;

[0032] The second gate includes a second movable plate rotatably embedded in the slag discharge port and a second fixed plate fixedly arranged and cooperating with the second movable plate. The second connecting rod passes through the middle of the second movable plate and the second fixed plate and is connected to the second movable plate.

[0033] One of the above technical solutions has the following advantages or beneficial effects:

[0034] 1. Through the provided filtering mechanism, when it is necessary to clean impurities attached to the filter screen, the movable baffle is adjusted to cover the outer cylinder. At this time, water can only enter the inner cylinder through the water inlet of the four-way pipe and further flow into the diversion channel. An arc-shaped water film covering the filter screen is sprayed out from the diversion channel, which flushes the filter screen and causes the impurities attached to the inner side of the filter screen to return to the outer cylinder under the influence of the water flow. The impurities are then discharged from the outer cylinder through the drain port at the bottom of the outer cylinder and reach the slag discharge port of the four-way pipe, thereby achieving the purpose of quickly removing impurities intercepted in the four-way pipe;

[0035] 2. Through the switching mechanism and adjusting mechanism set up, by rotating the second rotating rod, the second rotating rod drives the second bevel gear to rotate under the restriction of the second mounting cavity, and the second bevel gear drives the meshing first bevel gear to rotate, so that the first bevel gear drives the turntable to rotate under the restriction of the first mounting cavity through the first rotating rod, and the turntable drives the first connecting rod to move through the guide groove, and the first connecting rod drives the slider to move horizontally along the length direction of the slide groove under the restriction of the slide groove. After the first connecting rod drives the movable baffle to move from one end of the guide groove to the other end, the movable baffle is switched between the water inlet end of the outer cylinder and the inner cylinder, thereby achieving the purpose of controlling the blocking target of the movable baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the three-dimensional structure of an anti-blocking filter device for heating is shown;

[0037] Figure 2 A schematic diagram of the front cross-sectional structure of an anti-clogging filter device for heating is shown;

[0038] Figure 3 A schematic diagram of a three-dimensional cross-sectional structure of a valve is shown;

[0039] Figure 4 A schematic diagram of a three-dimensional cross-sectional structure of a four-way pipe is shown;

[0040] Figure 5 Shows a schematic diagram of the three-dimensional structure of the filtering mechanism;

[0041] Figure 6 A schematic diagram of a three-dimensional cross-sectional structure of a filtering mechanism is shown;

[0042] Figure 7 Shown Figure 4 Schematic diagram of the enlarged structure at A in the middle;

[0043] Figure 8 A schematic diagram of a three-dimensional cross-sectional structure of the adjustment mechanism is shown;

[0044] Figure 9 A schematic diagram of a partial three-dimensional cross-sectional structure of a movable baffle closing an inner cylinder through an adjustment mechanism is shown;

[0045] Figure 10 A schematic diagram of a partial three-dimensional cross-sectional structure of a movable baffle closing an outer cylinder through an adjustment mechanism is shown;

[0046] Figure 11 A schematic diagram of a partial three-dimensional cross-sectional structure of the outer cylinder and the inner cylinder is shown;

[0047] Figure 12 It shows the front cross-sectional structure diagram and water flow direction diagram when the movable baffle closes the inner cylinder;

[0048] Figure 13 It shows the front cross-sectional structure diagram and water flow direction diagram when the movable baffle closes the outer cylinder;

[0049] Figure 14 Shown Figure 6 Schematic diagram of the enlarged structure at B in the middle;

[0050] Figure 15 A schematic diagram of the three-dimensional structure of the slag discharge pipe is shown;

[0051] Figure 16 shows a schematic diagram of a three-dimensional cross-sectional structure of the first gate;

[0052] Figure 17 A schematic diagram of the three-dimensional cross-sectional structure of the second gate is shown.

[0053] Legend:

[0054] 10. Connecting pipes; 11. Cross pipe; 12. Valve;

[0055] 20. Filter mechanism; 21. Mounting base; 22. Outer cylinder; 221. Fixed baffle; 23. Filter screen; 24. Drain outlet; 25. Inner cylinder; 26. Diversion channel; 27. Movable baffle; 28. Slag discharge pipe; 281. Slag discharge hole;

[0056] 30. Switching mechanism; 31. Mounting frame; 32. Slide groove; 33. Slider; 34. Turntable; 35. Guide groove; 36. First connecting rod;

[0057] 40. Adjustment mechanism; 41. First mounting cavity; 42. Second mounting cavity; 43. First rotating rod; 44. Second rotating rod; 45. First bevel gear; 46. Second bevel gear; 47. Knob; 48. Rotation cavity; 49. Torsion spring; 410. Second connecting rod;

[0058] 50. Opening and closing mechanism; 51. First gate; 511. First movable plate; 512. First fixed plate; 52. Second gate; 521. Second movable plate; 522. Second fixed plate; 53. Third connecting rod. DETAILED DESCRIPTION

[0059] The following will be combined with the accompanying drawings to clearly and completely describe the technical embodiments of the present invention, a heating anti-clogging filter device. 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 efforts are within the scope of protection of the present invention.

[0060] In order to solve the problem that the number of impurities in modern heating systems is reduced, the impurities on the filter are of a single type and not easy to deposit, and the method of removing the filter from the equipment for cleaning is too cumbersome when the intercepted objects are easy to clean, the present invention proposes an anti-blocking filter device for heating, such as Figure 1 - Figure 17 As shown:

[0061] The connecting pipe 10 includes a four-way pipe 11 provided with a water inlet, a water outlet, a slag discharge port and a mounting port. Valves 12 are installed at the water inlet and the water outlet. A filter mechanism 20 is installed in the four-way pipe 11. The filter mechanism 20 includes a mounting seat 21 mounted on the mounting port of the four-way pipe 11. An outer cylinder 22 and an inner cylinder 25 nested in the outer cylinder 22 are fixedly mounted on the mounting seat 21.

[0062] like Figure 5-Figure 6 、 Figure 11-13 As shown, the outer cylinder 22 is provided with a filter screen 23 for filtering impurities and a drain outlet 24 for discharging impurities. When water is injected into the outer cylinder 22 through the water inlet of the four-way pipe 11, impurities in the water are filtered by the filter screen 23 and retained inside the filter screen 23. The filtered water passes through the filter screen 23 and is discharged through the water outlet of the four-way pipe 11. The inner cylinder 25 is connected to the outer cylinder 22 through a guide channel 26. The guide channel 26 is arranged in an inclined shape and has a water outlet with the same curvature as the outer wall of the outer cylinder 22.

[0063] When it is necessary to clean the impurities attached to the filter screen 23, water is injected into the inner cylinder 25 through the water inlet of the four-way pipe 11 and enters the guide channel 26. Then, an arc-shaped water film covering the filter screen 23 is sprayed out from the guide channel 26 to flush the filter screen 23, so that the impurities attached to the inner side of the filter screen 23 are returned to the outer cylinder 22 under the influence of the water flow, and are discharged from the outer cylinder 22 through the drain port 24 opened at the bottom of the outer cylinder 22 and reach the slag discharge port of the four-way pipe 11, thereby achieving the purpose of quickly removing the impurities intercepted in the four-way pipe 11.

[0064] Preferably, Figure 1As shown, a slag discharge pipe 28 is installed on the slag discharge port of the four-way pipe 11. The slag discharge pipe 28 receives the water discharged from the drain port 24 and discharges it from the four-way pipe 11 through the strip slag discharge holes 281 opened on the surface. Under the guidance of the strip slag discharge holes 281, the water entrained with impurities can be discharged from the four-way pipe 11 in the form of a water film, which is convenient for maintenance personnel to observe whether there are still impurities in the water. After the amount of impurities contained in the discharged water is reduced to a safe range, the flushing of the filter 23 is stopped in time to allow the water to flow back into the heating system.

[0065] In order to control the water to enter the outer cylinder 22 or the inner cylinder 25, Figure 4 、 Figure 5 、 Figure 7-10 As shown, a plurality of movable baffles 27 are movably provided in the outer cylinder 22 for blocking the water inlet end of either the outer cylinder 22 or the inner cylinder 25. A fixed baffle 221 is provided on the inner wall of the outer cylinder 22. The fixed baffle 221 has a cavity for the movable baffle 27 to move. The movable baffle 27 slides into the cavity and combines with the fixed baffle 221 to form an annular plate that blocks the water inlet end of the outer cylinder 22, thereby achieving the purpose of enabling the movable baffle 27 to block the outer cylinder 22 with a larger diameter. Under the blocking of the movable baffle 27, water can only enter one of the outer cylinder 22 or the inner cylinder 25.

[0066] Furthermore, in order to control the movement of the movable baffle 27, a switching mechanism 30 is further provided on the inner wall of the mounting seat 21. The switching mechanism 30 includes a plurality of mounting frames 31 provided on the inner wall of the cross-tube 11. The mounting frames 31 are provided with slide grooves 32, and sliders 33 are slidably embedded in the slide grooves 32. A turntable 34 rotatably provided in the mounting seat 21 is provided with the same number of guide grooves 35 as the number of sliders 33. A first connecting rod 36 connecting the movable baffle 27 and the sliders 33 is provided through the guide grooves 35.

[0067] By rotating the rotary disk 34, the rotary disk 34 drives the first connecting rod 36 to move through the guide groove 35. The first connecting rod 36 drives the slider 33 to move horizontally along the length direction of the slide groove 32 under the restriction of the slide groove 32. After the first connecting rod 36 drives the movable baffle 27 to move from one end of the guide groove 35 to the other end, the movable baffle 27 is switched between the water inlet end of the outer cylinder 22 and the inner cylinder 25, thereby achieving the purpose of controlling the blocking target of the movable baffle 27.

[0068] Preferably, the first connecting rod 36 is detachably mounted on the slider 33. When the outer cylinder 22 and the inner cylinder 25 need to be removed from the four-way pipe 11, the mounting seat 21 is pulled out of the four-way pipe 11. At this time, the mounting seat 21 drives the movable baffle 27 to move through the fixed baffle 221, and the movable baffle 27 drives the first connecting rod 36 to move to release the connection with the slider 33, thereby achieving the purpose of disassembling and replacing the components in the filtering mechanism 20.

[0069] At the same time, in order to control the rotation of the turntable 34, as shown in FIG. Figure 11-14 As shown, the mounting seat 21 is further provided with an adjustment mechanism 40 for controlling the rotation of the turntable 34. The adjustment mechanism 40 includes a first mounting cavity 41 disposed transversely in the middle of the mounting seat 21. When the movable baffle 27 slides from the mounting seat 21 toward the inner cylinder 25, the outer edge of the first mounting cavity 41 is tightly attached to the movable baffle 27 to form a circular plate that blocks the inner cylinder 25.

[0070] A second mounting cavity 42 is provided in the middle of the first mounting cavity 41, which vertically passes through the inner cylinder 25 and the outer cylinder 22. A first rotating rod 43 and a second rotating rod 44 connected to the turntable 34 are rotatably provided in the first mounting cavity 41 and the second mounting cavity 42. A first bevel gear 45 and a second bevel gear 46 that mesh with each other are respectively installed on the first rotating rod 43 and the second rotating rod 44. By rotating the second rotating rod 44, the second rotating rod 44 drives the second bevel gear 46 to rotate under the restriction of the second mounting cavity 42, and the second bevel gear 46 drives the meshed first bevel gear 45 to rotate, so that the first bevel gear 45 drives the turntable 34 to rotate under the restriction of the first mounting cavity 41 through the first rotating rod 43, thereby achieving the purpose of controlling the rotation of the turntable 34.

[0071] Further, such as Figure 15 As shown, in order to facilitate the staff to rotate the second rotating rod 44 and avoid the problem that the staff fails to adjust the movable baffle 27 to cover the inner cylinder 25 after the maintenance is completed, resulting in water always entering the inner cylinder 25 and being discharged through the slag discharge port and unable to reach the water outlet, a second connecting rod 410 connected to the second rotating rod 44 is rotatably provided in the slag discharge pipe 28, and the bottom of the second connecting rod 410 is connected to a rotating knob 47 rotatably embedded in the bottom of the slag discharge pipe 28. The staff can rotate the second rotating rod 44 by holding and rotating the rotating knob 47 through the second connecting rod 410;

[0072] At the same time, a rotating cavity 48 for the second connecting rod 410 to pass through is provided in the middle of the inner wall of the slag discharge pipe 28, and a torsion spring 49 is wound around the surface of the part of the second connecting rod 410 located in the rotating cavity 48, and the two ends of the torsion spring 49 are respectively connected to the inner wall of the rotating cavity 48. Through this design, when the knob 47 is rotated, the second connecting rod 410 cooperates with the rotating cavity 48 to pull the torsion spring 49, so that the torsion spring 49 undergoes elastic deformation. At this time, the movable baffle 27 covers the outer cylinder 22, and water can carry impurities with it and be discharged through the slag discharge pipe 28 and the slag discharge hole 281. After loosening the knob 47, the torsion spring 49 pulls the second rotating rod 44 and the second connecting rod 410 to rotate in the opposite direction and reset under the action of elastic deformation recovery, and the movable baffle 27 covers the inner cylinder 25 again. At this time, the water is filtered through the filter screen 23 and reaches the water outlet of the four-way pipe 11.

[0073] Furthermore, in order to achieve the effect that when the movable baffle 27 covers the outer cylinder 22, water cannot be discharged through the water outlet of the four-way pipe 11, and when the movable baffle 27 covers the inner cylinder 25, water cannot be discharged through the slag discharge port of the four-way pipe 11, an opening and closing mechanism 50 is further provided inside the four-way pipe 11, which is controlled by rotating the knob 47. The opening and closing mechanism 50 includes a first gate 51 provided at the water outlet of the four-way pipe 11 and a second gate 52 provided at the slag discharge port. The first gate 51 includes a rotatable gate embedded in the A first movable plate 511 at the water outlet and a first fixed plate 512 fixedly disposed and cooperating with the first movable plate 511 are provided. A third connecting rod 53 connected to the second rotating rod 44 is installed in the middle of the first movable plate 511. The second gate 52 includes a second movable plate 521 rotatably embedded in the slag discharge port and a second fixed plate 522 fixedly disposed and cooperating with the second movable plate 521. The second connecting rod 410 passes through the middle of the second movable plate 521 and the second fixed plate 522 and is connected to the second movable plate 521.

[0074] The first movable plate 511 and the first fixed plate 512, the second movable plate 521 and the second fixed plate 522 are in an open state when their positions are staggered, and in a closed state when their positions overlap. When either the first gate 51 or the second gate 52 is open, the other is closed.

[0075] By rotating the knob 47 to adjust the position of the movable baffle 27, the knob 47 drives the second movable plate 521 and the second rotating rod 44 to rotate through the second connecting rod 410. At the same time, the second rotating rod 44 drives the first fixed plate 512 to rotate through the third connecting rod 53, thereby achieving the purpose of controlling the second movable plate 521 and the second fixed plate 522 to rotate and switch the opening and closing states. It should be noted that if Figure 4 As shown, the third connecting rod 53 is of detachable design and needs to be inserted before installing the valve 12 at the water outlet of the four-way pipe 11. The third connecting rod 53 passes through the first gate 51 and is inserted into the second installation cavity 42, and is connected to the second rotating rod 44 rotatably arranged in the second installation cavity 42.

[0076] Working principle:

[0077] When the filter mechanism 20 is in filtering mode, the movable baffle 27 is adjusted to cover the inner cylinder 25 by turning the knob 47. At this time, water can only enter the outer cylinder 22. Water is injected into the outer cylinder 22 through the water inlet of the four-way pipe 11. When the water passes through the filter screen 23, impurities are intercepted and retained inside the filter screen 23. At this time, the first gate 51 is opened and the second gate 52 is closed. The filtered water is discharged through the water outlet of the four-way pipe 11.

[0078] When the filter mechanism 20 is in the filter screen cleaning mode, the movable baffle 27 is adjusted to cover the outer cylinder 22 by rotating the knob 47. At this time, water can only enter the inner cylinder 25, and the first gate 51 is closed and the second gate 52 is opened, so that water is injected into the inner cylinder 25 through the water inlet of the four-way pipe 11 and enters the diversion channel 26. The water is sprayed out from the diversion channel 26 to form an arc-shaped water film covering the filter screen 23, flushing impurities on the inside of the filter screen 23. The impurities attached to the inside of the filter screen 23 are carried back into the outer cylinder 22 by the water flow and discharged to the slag discharge pipe 28 through the water outlet 24 provided at the bottom of the outer cylinder 22. The water carrying the impurities is discharged from the four-way pipe 11 through the strip-shaped slag discharge holes 281 provided on the surface of the slag discharge pipe 28.

[0079] After cleaning is completed, release the knob 47. Under the action of the torsion spring 49, the movable baffle 27 covers the inner cylinder 25 again. At this time, the water is filtered through the filter screen 23 again and reaches the water outlet of the four-way pipe 11. The first gate 51 opens and the second gate 52 closes, returning to the filtering mode.

[0080] The above description is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes to a heating anti-blocking filter device and its inventive concept according to the technology of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A blocking prevention filter device for heating, comprising a connecting pipe (10), the connecting pipe (10) comprising a four-way pipe (11) provided with a water inlet, a water outlet, a slag outlet and an installation port, valves (12) being installed at the water inlet and the water outlet, characterized in that: A filter mechanism (20) is installed in the four-way pipe (11). The filter mechanism (20) includes an outer cylinder (22) and an inner cylinder (25) nested in the outer cylinder (22). The inner cylinder (25) is connected to the outer cylinder (22) through a diversion channel (26). The diversion channel (26) is arranged in an inclined shape and has a water outlet with the same curvature as the outer wall of the outer cylinder (22). Water is sprayed out through the diversion channel (26) to form an arc-shaped water film covering the filter screen (23); The outer cylinder (22) is provided with a filter (23) for filtering impurities and a drain (24) for discharging impurities. A plurality of movable baffles (27) for blocking the water inlet end of either the outer cylinder (22) or the inner cylinder (25) are movably provided in the outer cylinder (22). The movable baffle (27) slides via a switching mechanism (30), the switching mechanism (30) comprising a plurality of mounting frames (31) arranged on the inner wall of the four-way pipe (11), a slide groove (32) being mounted on the mounting frame (31), and a slider (33) being slidably embedded in the slide groove (32); and rotating a turntable (34) disposed in the mounting seat (21), wherein the turntable (34) is provided with guide grooves (35) having the same number as the sliders (33), and a first connecting rod (36) connecting the movable baffle (27) and the slider (33) is provided through the guide grooves (35); When the inner cylinder (25) is closed, water flows into the outer cylinder (22) and is filtered through the filter screen (23) before being introduced into the valve (12). When the outer cylinder (22) is closed, water flows into the inner cylinder (25) and flushes the filter screen (23) through the diversion channel (26), entraining impurities intercepted on the filter screen (23) into the outer cylinder (22) and reaching the slag discharge port of the four-way pipe (11) through the drain port (24).

2. The anti-blocking filter device for heating according to claim 1, characterized in that: The filtering mechanism (20) further comprises a mounting seat (21) provided on the mounting opening of the four-way pipe (11) and a slag discharge pipe (28) on the slag discharge opening. The outer cylinder (22) and the inner cylinder (25) are both fixedly mounted on the mounting seat (21). The slag discharge pipe (28) receives water discharged from the drainage opening (24) and discharges the water out of the four-way pipe (11) through a strip-shaped slag discharge hole (281) provided on the surface.

3. The anti-blocking filter device for heating according to claim 2, characterized in that: A fixed baffle (221) is provided on the inner wall of the outer cylinder (22), and a cavity for the movable baffle (27) to move is opened on the fixed baffle (221). The movable baffle (27) slides into the cavity and is combined with the fixed baffle (221) to form an annular plate that closes the water inlet end of the outer cylinder (22).

4. The anti-blocking filter device for heating according to claim 1, characterized in that: The first connecting rod (36) is detachably mounted on the slider (33), and the connection between the slider (33) and the first connecting rod (36) is released when the mounting seat (21) is separated from the four-way pipe (11).

5. The anti-clogging filter device for heating according to claim 1, characterized in that: The mounting seat (21) is further provided with an adjustment mechanism (40) for controlling the rotation of the turntable (34). The adjustment mechanism (40) includes a first mounting cavity (41) arranged transversely in the middle of the mounting seat (21). When the outer edge of the first mounting cavity (41) is tightly fitted with the movable baffle (27), the inner cylinder (25) is blocked. A second mounting cavity (42) is provided in the middle of the first mounting cavity (41) and vertically penetrates the inner cylinder (25) and the outer cylinder (22). A first rotating rod (43) and a second rotating rod (44) connected to the rotating disk (34) are rotatably provided in the first mounting cavity (41) and the second mounting cavity (42). A first bevel gear (45) and a second bevel gear (46) meshing with each other are respectively installed on the first rotating rod (43) and the second rotating rod (44).

6. The anti-blocking filter device for heating according to claim 2, characterized in that: A second connecting rod (410) connected to a second rotating rod (44) is rotatably provided in the slag discharge pipe (28), and the bottom of the second connecting rod (410) is connected to a rotating knob (47) rotatably embedded in the bottom of the slag discharge pipe (28); A rotating cavity (48) for the second connecting rod (410) to pass through is provided in the middle of the inner wall of the slag discharge pipe (28), and a torsion spring (49) is wound around the surface of the second connecting rod (410) located in the rotating cavity (48), and both ends of the torsion spring (49) are respectively connected to the inner wall of the rotating cavity (48).

7. The anti-clogging filter device for heating according to claim 6, characterized in that: An opening and closing mechanism (50) is further provided inside the four-way pipe (11) and is controlled to open and close by rotating a knob (47). The opening and closing mechanism (50) comprises a first gate (51) provided at the water outlet of the four-way pipe (11) and a second gate (52) provided at the slag discharge port. When either the first gate (51) or the second gate (52) is opened, the other is closed.

8. The anti-clogging filter device for heating according to claim 7, characterized in that: The first gate (51) comprises a first movable plate (511) rotatably embedded at the water outlet and a first fixed plate (512) fixedly arranged and cooperating with the first movable plate (511); a third connecting rod (53) connected to the second rotating rod (44) is installed in the middle of the first movable plate (511); The second gate (52) comprises a second movable plate (521) rotatably embedded at the slag discharge port and a second fixed plate (522) fixedly arranged and cooperating with the second movable plate (521); the second connecting rod (410) passes through the middle of the second movable plate (521) and the second fixed plate (522) and is connected to the second movable plate (521).

Images