Valve with filtering function

Abstract

The invention relates to the technical field of valves, in particular to a valve with a filtering function, which comprises a filtering unit and a conversion unit, the filtering unit comprises a pump body, one end of the pump body is fixedly connected with a water inlet pipe, the middle part of the water inlet pipe is provided with a transfer box, and the interior of the transfer box is fixedly connected with a filter screen plate; the conversion unit comprises an auxiliary box fixedly connected to the side edge of the transfer box, the outer surface of a main shaft rod is fixedly connected with a main sealing plate, the outer surface of a side shaft rod is fixedly connected with a side sealing plate, a vertical rod is rotated to drive a driving wheel to rotate, and meanwhile a first driven wheel and a second driven wheel are driven to rotate by 90 degrees, so that the main sealing plate rotates from a horizontal state to a vertical state; the side sealing plate rotates from a vertical state to a horizontal state, at the moment, water flow flowing into the water inlet pipe flows out of the blow-off pipe, impurities gathered at the filter screen plate can be discharged along with the water flow, the impurities can be discharged and cleaned under the condition that the pipeline is not disassembled, and the cleaning effect and the cleaning efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and specifically, to a valve with a filtering function. Background Art

[0002] A valve is a device used to control the direction, pressure, and flow rate of a fluid in a fluid system. It is a device that enables the medium in a piping and equipment to flow or stop and can control its flow rate. However, impurities inevitably exist in the water flow. To protect the internal structure of the valve body, a filtering device needs to be installed at the water inlet end of the valve. For example, a filter screen plate is installed in the water inlet pipe near the valve to block and filter the impurities.

[0003] After retrieval, a valve with a filtering function disclosed in CN113028113A includes a valve body, a water inlet pipe and a water outlet pipe provided on the valve body, a connecting flange, the connecting flange is fixedly sleeved on the water inlet pipe, a first sealing ring, the first sealing ring is fixedly installed on the side of the connecting flange away from the water outlet pipe, a round plate, the round plate is arranged inside the first sealing ring, a water passing hole is opened on one side of the round plate, a filter plate, the filter plate is arranged in the water inlet pipe, the filter plate is in contact with the inner wall of the water inlet pipe, two second sealing rings, the two second sealing rings are respectively fixedly installed on both sides of the round plate. The valve with a filtering function has the advantages of being convenient for disassembling and replacing the filter plate and being able to increase the single - time filtering duration of the filter plate. However, the above - mentioned patent still has deficiencies in actual use;

[0004] Although a filter plate is provided in the water inlet pipe of the valve body to filter impurities, and a motor is used to drive a scraper to rotate to clean the filter plate, the impurities cleaned are not removed, but still linger at the filter plate. As time goes by, the accumulated impurities will inevitably cause the water flow to slow down. Each time, the water inlet pipe has to be opened to clean the impurities, which is rather inconvenient.

[0005] Based on this, the present invention discloses a valve with a filtering function. Summary of the Invention

[0006] To solve the problems in the background art, the present invention provides a valve with a filtering function, which includes a filtering unit and a conversion unit;

[0007] Among them, the filtering unit includes a pump body, one end of the pump body is fixedly connected to a water inlet pipe, the other end is fixedly connected to a drain pipe, a transfer box is arranged in the middle of the water inlet pipe, a filter screen plate is fixedly connected inside the transfer box, and a sewage pipe is fixedly connected to the side of the transfer box;

[0008] Among them, the conversion unit includes a secondary box fixedly connected to the side of the transfer box. A main spindle rod is movably inserted through one side of the secondary box that fits the transfer box. A main sealing plate is fixedly connected to the outer surface of the main spindle rod. A side spindle rod is movably inserted through one side of the secondary box close to the sewage pipe. A side sealing plate is fixedly connected to the outer surface of the side spindle rod;

[0009] Among them, a positioning component is arranged at the top of the secondary box, and a telescopic component is arranged on the outer surface of the main sealing plate;

[0010] Among them, an anti-blocking unit is arranged inside the transfer box;

[0011] As a further improvement of this technical solution, a vertical rod is movably inserted through the upper surface of the secondary box. The bottom end of the vertical rod extends into the secondary box and is fixedly connected with a driving wheel. One end of the main spindle rod extending into the secondary box is fixedly connected with a driven wheel I. One end of the side spindle rod extending into the secondary box is fixedly connected with a driven wheel II. The driving wheel is meshed with the driven wheel I and the driven wheel II.

[0012] As a further improvement of this technical solution, the positioning component includes a pressing rod rotatably connected to the top end of the vertical rod. The pressing rod is set as an eccentric wheel structure at the end of the vertical rod. A cap is slidably sleeved on the outer surface of the vertical rod. A tooth is fixedly connected to the lower surface of the cap.

[0013] As a further improvement of this technical solution, a top groove is opened at the top of the secondary box. A first spring is arranged inside the top groove. The top end of the first spring is limited inside the cap. Card slots are opened at the four peripheral edges of the top groove. The tooth is clamped inside the card slots.

[0014] As a further improvement of this technical solution, a pull rod is hinged to the upper surface of the main sealing plate. A positioning plate is arranged at the end of the pull rod away from the main sealing plate. A groove is opened at the top end of the positioning plate. The pull rod is hinged inside the groove.

[0015] As a further improvement of this technical solution, the anti-blocking component includes a cleaning component arranged on the outer surface of the filter screen plate and a folding component arranged inside the cleaning component.

[0016] As a further improvement of this technical solution, the cleaning component includes a central rod movably inserted through the middle of the filter screen plate. A plurality of fan blades are movably connected to the end of the central rod away from the filter screen plate. A sleeve is fixedly sleeved on the outer surface of the central rod. A cleaning rod is rotatably connected to the outer surface of the sleeve. Brush hairs are annularly distributed on the outer surface of the cleaning rod.

[0017] As a further improvement of this technical solution, a bevel gear is fixedly connected to the end of the cleaning rod away from the sleeve. A toothed ring is fixedly connected to the inner wall of the transfer box. The bevel gear is meshed with the toothed ring.

[0018] As a further improvement of the technical solution, the folding assembly includes an inner rod slidably connected inside the central rod. One end of the inner rod extending out of the central rod is rotatably connected to the positioning plate. One end of the inner rod close to the fan blade is hinged with a support rod. A strip-shaped groove is formed on the outer surface of the central rod. The support rod is slidably connected inside the strip-shaped groove. One end of the support rod away from the inner rod is hinged to the outer surface of the fan blade.

[0019] As a further improvement of the technical solution, a cavity is formed inside the central rod. A collar is fixedly sleeved on the outer surface of the inner rod. The collar is slidably connected inside the cavity. A second spring is arranged inside the cavity. The second spring is sleeved on the outer surface of the inner rod. The second spring abuts against the outer surface of the collar.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. In this valve with a filtering function, by setting the conversion assembly and the positioning assembly, rotating the vertical rod drives the driving wheel to rotate, and at the same time drives the first driven wheel and the second driven wheel to rotate by 90 degrees, so that the main sealing plate rotates from the horizontal state to the vertical state, and the side sealing plate rotates from the vertical state to the horizontal state. Then, by rotating the pressing rod to press down the cap, the locking of the vertical rod is achieved. At this time, the water flowing into the water inlet pipe will flow out from the sewage pipe, and the impurities accumulated at the filter screen plate will be discharged together with the water flow, realizing the discharge and cleaning of impurities without disassembling the pipeline, improving the cleaning effect and cleaning efficiency.

[0022] 2. In this valve with a filtering function, by setting the cleaning assembly to act on the filter screen plate, the driving force of the water flow is used to drive the fan blade to rotate, and then drive the cleaning rod to make a circular motion around the central rod. The bristles on the outer surface of the cleaning rod can clean the outer surface of the filter screen plate. At the same time, since the bevel gear at the end of the cleaning rod meshes with the toothed ring, the cleaning rod will rotate self - rotatably, improving the cleaning effect.

[0023] 3. In this valve with a filtering function, by setting the telescopic assembly and the folding assembly, pulling the positioning plate with the pull rod, driving the support rod to move under the transmission of the inner rod, thereby pulling the fan blade to move. In addition, when the pull rod loses the pulling effect on the positioning plate, the second spring rebounds to push the inner rod to move, and the support rod will lift up to support and lift the fan blade, realizing the switching of the fan blade between the vertical and horizontal states. When horizontal, it can reduce the blockage of the water flow and ensure the rapid flow of the water flow. When vertical, it can use the water flow as the driving force to rotate, thereby driving the whole cleaning assembly to move, demonstrating the versatility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 Schematic diagram of the partial cross-sectional structure of the present invention;

[0026] Figure 3 Schematic diagram of the structure of the conversion unit of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the positioning component of the present invention;

[0028] Figure 5 Schematic diagram of the internal structure of the transfer box of the present invention;

[0029] Figure 6 Schematic diagram of the structure of the cleaning component of the present invention;

[0030] Figure 7 Schematic diagram of the cooperation structure of the telescopic component and the folding component of the present invention;

[0031] Figure 8 Schematic diagram of the structure of the folding component of the present invention.

[0032] The meanings of the various reference numerals in the figure are as follows:

[0033] 101, pump body; 102, water inlet pipe; 103, drain pipe; 104, transfer box; 105, filter screen plate; 106, sewage discharge pipe; 201, auxiliary box; 202, main shaft rod; 203, main sealing plate; 204, side shaft rod; 205, side sealing plate; 206, vertical rod; 207, driving wheel; 208, first driven wheel; 209, second driven wheel; 301, pressing rod; 302, cap; 303, engaging teeth; 304, top groove; 305, clamping groove; 306, first spring; 401, pull rod; 402, positioning plate; 403, groove; 501, central rod; 502, fan blade; 503, collar; 504, cleaning rod; 505, bevel gear; 506, toothed ring; 601, inner rod; 602, cavity; 603, bushing; 604, second spring; 605, support rod; 606, strip-shaped groove. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Existing ones.

[0036] Therefore, the present invention provides a valve with a filtering function, as Figures 1 to 8 shown, including a filtering unit and a conversion unit;

[0037] Among them, the filtering unit includes a pump body 101. One end of the pump body 101 is fixedly connected to a water inlet pipe 102, and the other end is fixedly connected to a drain pipe 103. A transfer box 104 is arranged in the middle of the water inlet pipe 102. A filter screen plate 105 is fixedly connected inside the transfer box 104. A sewage discharge pipe 106 is fixedly connected to the side of the transfer box 104;

[0038] During the water flow transportation process, open the valve body. The water flow enters the valve body through the water inlet pipe 102 and then discharges from the drain pipe 103 and is transported to the designated position. A filter screen plate 105 is arranged in the conversion box in the middle of the water inlet pipe 102 to filter impurities in the water flow, reduce the damage of impurities to the valve body, and improve the service life of the valve body. The impurities intercepted by the filter screen plate 105 will gather on the side of the filter screen plate 105 away from the valve body.

[0039] Such as Figure 2 、 Figure 3 and Figure 4 As shown in

[0040] Rotate the vertical rod 206. Through the driving wheel 207, the driven wheel one 208 and the driven wheel two 209 can be synchronously driven to rotate by 90 degrees. The rotation of the driven wheel one 208 drives the rotation of the main sealing plate 203 through the rotation of the main shaft rod 202, so that it rotates from the horizontal state to the vertical state, blocking the channel between the conversion box and the valve body. The rotation of the driven wheel two 209 drives the rotation of the side sealing plate 205 through the rotation of the side shaft rod 204, so that it rotates from the vertical state to the horizontal state, opening the channel between the conversion box and the sewage discharge pipe 106. At this time, push down the pressure rod 301, so that the eccentric wheel presses down the cap 302, thereby ensuring that the locking teeth 303 are stuck in the card slots 305 to achieve the effect of positioning and locking the vertical rod 206. The water flow flowing into the water inlet pipe 102 will flow out from the sewage discharge pipe 106, so that the impurities gathered at the filter screen plate 105 will be discharged together with the water flow, realizing the discharge and cleaning of impurities without disassembling the pipeline, and improving the cleaning effect and cleaning efficiency.

[0041] Such asFigure 2 and Figure 4 As shown in Figure 4 , the positioning component includes a pressing rod 301 rotatably connected to the top end of the vertical rod 206. The pressing rod 301 is sleeved at the end of the vertical rod 206 and is set as an eccentric wheel structure. A cap 302 is slidably sleeved on the outer surface of the vertical rod 206. A tooth 303 is fixedly connected to the lower surface of the cap 302. A top groove 304 is opened at the top end of the secondary box 201. A first spring 306 is arranged inside the top groove 304. The top end of the first spring 306 is limited inside the cap 302. A card slot 305 is opened at the periphery of the top groove 304. The tooth 303 is clamped inside the card slot 305;

[0042] Pull the pressing rod 301 upward to make the pressing rod 301 rotate 90 degrees around the end of the vertical rod 206. Since the connection between the pressing rod 301 and the vertical rod 206 is an eccentric wheel structure and presses on the upper part of the cap 302, lifting the pressing rod 301 can increase the distance between the eccentric wheel and the cap 302. Under the action of the resilience of the first spring 306, the cap 302 can be lifted upward, so that the tooth 303 is removed from the card slot 305, and the limit on the vertical rod 206 is lost. After the conversion is completed, push the pressing rod 301 downward to make the eccentric wheel press down the cap 302, so as to ensure that the tooth 303 is stuck in the card slot 305 to achieve the effect of positioning and locking, and prevent the rotation of the vertical rod 206.

[0043] As Figure 5 and Figure 7 As shown in Figure 7 , a pull rod 401 is hinged on the upper surface of the main sealing plate 203. A positioning plate 402 is arranged at the end of the pull rod 401 away from the main sealing plate 203. A groove 403 is opened at the top end of the positioning plate 402. The pull rod 401 is hinged inside the groove 403;

[0044] During the flipping process of the main sealing plate 203, the main sealing plate 203 will pull the positioning plate 402 to move through the pull rod 401, so as to realize the switching of the structure.

[0045] As Figures 5 to 8 and shown, the anti-blocking component includes a cleaning component arranged on the outer surface of the filter screen plate 105 and a folding component arranged inside the cleaning component. The cleaning component includes a central rod 501 movably inserted through the middle of the filter screen plate 105. The central rod 501 is rotatably connected to the filter screen plate 105. A plurality of fan blades 502 are movably connected to the end of the central rod 501 away from the filter screen plate 105. A sleeve 603 is fixedly sleeved on the outer surface of the central rod 501. A cleaning rod 504 is rotatably connected to the outer surface of the sleeve 603. Brush hairs are annularly distributed on the outer surface of the cleaning rod 504. A bevel gear 505 is fixedly connected to the end of the cleaning rod 504 away from the sleeve 603. A toothed ring 506 is fixedly connected to the inner wall of the transfer box 104. The bevel gear 505 is meshed with the toothed ring 506;

[0046] The folding assembly includes an inner rod 601 slidably connected inside the central rod 501. One end of the inner rod 601 extending out of the central rod 501 is rotatably connected to the positioning plate 402. One end of the inner rod 601 close to the fan blade 502 is hinged with a support rod 605. A strip-shaped groove 606 is formed on the outer surface of the central rod 501. The support rod 605 is slidably connected inside the strip-shaped groove 606. One end of the support rod 605 away from the inner rod 601 is hinged to the outer surface of the fan blade 502. A cavity 602 is formed inside the central rod 501. A collar 503 is fixedly sleeved on the outer surface of the inner rod 601. The collar 503 is slidably connected inside the cavity 602. A second spring 604 is arranged inside the cavity 602. The second spring 604 is sleeved on the outer surface of the inner rod 601. The second spring 604 abuts against the outer surface of the collar 503;

[0047] During the flipping process of the main sealing plate 203, the upper part of the main sealing plate 203 will flip towards the filter screen plate 105. Then the pull rod 401 will also approach the positioning plate 402 and lose the pulling effect on the positioning plate 402. The compressed second spring 604 will rebound and push the collar 503 to slide inside the cavity 602, thereby driving the inner rod 601 to move. One end of the inner rod 601 away from the positioning plate 402 moves towards the fan blade 502, and the support rod 605 will lift upwards to support and lift the fan blade 502, making all the fan blades 502 change from the horizontal state to the vertical state, completing the conversion of the fan blades 502. At this time, the flowing water passing through the fan blades 502 will drive them to rotate, thereby driving the central rod 501 to rotate synchronously. During the rotation of the central rod 501, the cleaning rod 504 on the outer surface is driven by the shaft to move in a circular motion around the central rod 501. The bristles on the outer surface of the cleaning rod 504 can clean the outer surface of the filter screen plate 105. At the same time, the bevel gear 505 at the end of the cleaning rod 504 meshes with the toothed ring 506, thereby driving the cleaning rod 504 to rotate self - rotatively, improving the cleaning effect. The dirt cleaned off will also be discharged from the sewage pipe 106 along with the water flow, further improving the cleaning effect and ensuring the smooth flow of the subsequent water flow. After the dirt is discharged, the water flow becomes clear again. For the conversion again, the main sealing plate 203 will pull the positioning plate 402 to move through the pull rod 401, thereby driving the inner rod 601 to slide inside the central rod 501 towards the positioning plate 402 direction, driving the fan blade 502 to change from the vertical state to the horizontal state, which can reduce the blockage of the water flow and ensure the rapid flow of the water flow, demonstrating the versatility of the device.

[0048] In the technical solution provided by the present invention, during the water flow transportation process, the valve body is opened, and the water flow enters the valve body through the water inlet pipe 102 and then is discharged from the drain pipe 103 to the designated position. A filter screen plate 105 is arranged in the conversion box in the middle of the water inlet pipe 102 to filter impurities in the water flow, reduce the damage of impurities to the valve body, and improve the service life of the valve body. The impurities intercepted by the filter screen plate 105 will accumulate on the side of the filter screen plate 105 away from the valve body and need to be cleaned regularly;

[0049] The specific cleaning process is as follows. First, pull the pressing rod 301 upward so that the pressing rod 301 rotates 90 degrees with the end of the vertical rod 206 as the center. Since the connection between the pressing rod 301 and the vertical rod 206 is an eccentric wheel structure and presses on the upper part of the cap 302, lifting the pressing rod 301 can increase the distance between the eccentric wheel and the cap 302. Under the action of the resilience of the first spring 306, the cap 302 can be lifted upward, so that the locking teeth 303 are removed from the card slots 305, losing the limit on the vertical rod 206. At this time, rotate the vertical rod 206, and the driving wheel 207 can synchronously drive the first driven wheel 208 and the second driven wheel 209 to rotate 90 degrees. The rotation of the first driven wheel 208 drives the main sealing plate 203 to rotate through the main spindle rod 202, so that it rotates from the horizontal state to the vertical state, sealing the channel between the conversion box and the valve body. The rotation of the second driven wheel 209 drives the side sealing plate 205 to rotate through the side spindle rod 204, so that it rotates from the vertical state to the horizontal state, opening the channel between the conversion box and the sewage pipe 106. At this time, push the pressing rod 301 downward so that the eccentric wheel presses down the cap 302, thus ensuring that the locking teeth 303 are stuck in the card slots 305 to achieve the effect of positioning and locking the vertical rod 206. The water flowing into the water inlet pipe 102 will flow out from the sewage pipe 106, and the impurities accumulated at the filter screen plate 105 will be discharged together with the water flow, realizing the discharge and cleaning of impurities without disassembling the pipeline, improving the cleaning effect and cleaning efficiency;

[0050] During the flipping process of the main sealing plate 203, the upper part of the main sealing plate 203 will flip towards the filter screen plate 105. Then, the pull rod 401 will also approach the positioning plate 402 and lose the pulling effect on the positioning plate 402. The compressed second spring 604 will rebound and push the collar 503 to slide within the cavity 602, thereby driving the inner rod 601 to move. The end of the inner rod 601 away from the positioning plate 402 will move towards the fan blades 502, and the support rod 605 will lift upwards to support and lift the fan blades 502, causing all the fan blades 502 to change from the horizontal state to the vertical state, completing the conversion of the fan blades 502. At this time, the flowing water passing through the fan blades 502 will drive them to rotate, thereby driving the central rod 501 to rotate synchronously. During the rotation of the central rod 501, the cleaning rod 504 on its outer surface will rotate around the central rod 501 in a circular motion through the shaft conversion. The bristles on the outer surface of the cleaning rod 504 can clean the outer surface of the filter screen plate 105. At the same time, the bevel gear 505 at the end of the cleaning rod 504 meshes with the toothed ring 506, thereby driving the cleaning rod 504 to rotate self - sufficiently, improving the cleaning effect. The dirt cleaned off will also be discharged from the sewage pipe 106 along with the water flow, further enhancing the cleaning effect and ensuring the smooth flow of the subsequent water. After observing that the water discharged from the sewage pipe 106 changes from turbid to clear, rotate the vertical rod 206 again to close the sewage pipe 106 and open the channel of the water inlet pipe 102 towards the valve body, realizing the conversion of the water flow direction. And during this process, the main sealing plate 203 will pull the positioning plate 402 to move through the pull rod 401, thereby driving the inner rod 601 to slide towards the positioning plate 402 within the central rod 501, driving the fan blades 502 to change from vertical to horizontal, which can reduce the blockage of the water flow and ensure the rapid flow of the water. After the switching is completed, push down the pressure rod 301 to make the eccentric wheel press down the cap 302, thereby ensuring that the locking teeth 303 are stuck in the card slots 305 to achieve the effect of positioning and locking, preventing the self - rotation of the vertical rod 206.

[0051] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0052] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve with a filtering function, characterized in that, Including: A filtering unit and a conversion unit; Among them, the filtering unit includes a pump body (101), one end of the pump body (101) is fixedly connected to a water inlet pipe (102), the other end is fixedly connected to a drain pipe (103), a transfer box (104) is arranged in the middle of the water inlet pipe (102), a filter screen plate (105) is fixedly connected inside the transfer box (104), and a sewage discharge pipe (106) is fixedly connected to the side of the transfer box (104); Among them, the conversion unit includes a secondary box (201) fixedly connected to the side of the transfer box (104), a main shaft rod (202) is movably inserted through one side of the secondary box (201) that fits the transfer box (104), a main sealing plate (203) is fixedly connected to the outer surface of the main shaft rod (202), a side shaft rod (204) is movably inserted through one side of the secondary box (201) close to the sewage discharge pipe (106), and a side sealing plate (205) is fixedly connected to the outer surface of the side shaft rod (204); Among them, a positioning component is arranged at the top of the secondary box (201), and a telescopic component is arranged on the outer surface of the main sealing plate (203); Among them, an anti-blocking unit is arranged inside the transfer box (104).

2. The valve with a filtering function according to claim 1, characterized in that: A vertical rod (206) is movably inserted through the upper surface of the secondary box (201), the bottom end of the vertical rod (206) extends into the secondary box (201) and is fixedly connected to a driving wheel (207), one end of the main shaft rod (202) extending into the secondary box (201) is fixedly connected to a driven wheel one (208), one end of the side shaft rod (204) extending into the secondary box (201) is fixedly connected to a driven wheel two (209), and the driving wheel (207) is meshed with the driven wheel one (208) and the driven wheel two (209).

3. The valve with a filtering function according to claim 2, characterized in that: The positioning component includes a pressing rod (301) rotatably connected to the top of the vertical rod (206), the pressing rod (301) is sleeved at the end of the vertical rod (206) and is set as an eccentric wheel structure, a cap (302) is slidably sleeved on the outer surface of the vertical rod (206), and a tooth (303) is fixedly connected to the lower surface of the cap (302).

4. The valve with a filtering function according to claim 3, wherein: A top groove (304) is opened at the top of the secondary box (201), a first spring (306) is arranged inside the top groove (304), the top end of the first spring (306) is limited inside the cap (302), clamping grooves (305) are opened at the four peripheral edges of the top groove (304), and the tooth (303) is clamped inside the clamping grooves (305).

5. The valve with a filtering function according to claim 1, characterized in that: A pull rod (401) is hinged to the upper surface of the main sealing plate (203), a positioning plate (402) is arranged at the end of the pull rod (401) away from the main sealing plate (203), a groove (403) is opened at the top of the positioning plate (402), and the pull rod (401) is hinged inside the groove (403).

6. The valve with a filtering function according to claim 1, characterized in that: The anti-blocking component includes a cleaning component arranged on the outer surface of the filter screen plate (105) and a folding component arranged inside the cleaning component.

7. The valve with a filtering function according to claim 6, characterized in that: The cleaning component includes a central rod (501) movably inserted through the middle of the filter screen plate (105). One end of the central rod (501) away from the filter screen plate (105) is movably connected with a plurality of fan blades (502). An outer surface of the central rod (501) is fixedly sleeved with a sleeve (603). An outer surface of the sleeve (603) is rotatably connected with a cleaning rod (504). Brush hairs are annularly distributed on an outer surface of the cleaning rod (504).

8. The valve with a filtering function according to claim 7, characterized in that: One end of the cleaning rod (504) away from the sleeve (603) is fixedly connected with a bevel gear (505). An inner wall of the transfer box (104) is fixedly connected with a toothed ring (506). The bevel gear (505) is meshed with the toothed ring (506).

9. The valve with a filtering function according to claim 6, wherein: The folding component includes an inner rod (601) slidably connected inside the central rod (501). One end of the inner rod (601) extending out of the central rod (501) is rotatably connected with a positioning plate (402). One end of the inner rod (601) close to the fan blades (502) is hinged with a support rod (605). A strip-shaped groove (606) is formed on an outer surface of the central rod (501). The support rod (605) is slidably connected inside the strip-shaped groove (606). One end of the support rod (605) away from the inner rod (601) is hinged on an outer surface of the fan blade (502).

10. The valve with a filtering function according to claim 9, characterized in that: A cavity (602) is formed inside the central rod (501). An outer surface of the inner rod (601) is fixedly sleeved with a collar (503). The collar (503) is slidably connected inside the cavity (602). A second spring (604) is arranged inside the cavity (602). The second spring (604) is sleeved on an outer surface of the inner rod (601). The second spring (604) abuts against an outer surface of the collar (503).

Images