Self-cleaning valve with blowdown function

Abstract

The application belongs to the technical field of valves, and discloses a self-cleaning valve with a blowdown function, which comprises a valve body, an input end and an output end on the valve body, a filtering mechanism arranged on the valve body, and a valve core assembly arranged in the input end and the output end and used for plugging the input end and the output end when the filtering mechanism works, wherein a pump gas port and a discharge port are formed in the top of the valve body. The above scheme drives the connecting plate to move upwards by driving the lead screw motor, drives the scraping assembly to move upwards, scrapes off the impurities attached to the inner wall of the annular filter screen, then the scraping assembly is pushed upwards by the top rod, the elastic piston one moves upwards, when the bottom of the elastic piston one passes through the pump gas port, the pump gas assembly pumps gas into the valve body through the pump gas port, and the impurities between the top of the scraping assembly and the elastic piston one are blown out through the discharge port, so that the cleaning is quickly completed, and the problems of time-consuming and labor-consuming or liquid waste when the filtering structure in the valve is cleaned are solved.

Description

Technical Field

[0001] This invention belongs to the field of valve technology, specifically a self-cleaning valve with a sewage discharge function. Background Technology

[0002] Valves are devices used to control the direction, pressure, and flow rate of media in fluid systems. Their core functions include shut-off, regulation, flow diversion, and safety protection. In industrial and civil fluid systems, in addition to traditional control functions, valves also serve a filtration function, intercepting impurities through a built-in filter structure to prevent wear or blockage in downstream equipment. After prolonged use, impurities can clog the filter structure. Operators typically close the valve and remove the filter screen for cleaning. While this method is effective, it is time-consuming and labor-intensive. Alternatively, operators may install a normally closed pipe before the filter structure. When cleaning the filter structure is needed, this normally closed pipe is opened, connecting the valve to the normally closed pipe. The liquid, carrying impurities, will then drain through the normally closed pipe. However, while convenient and quick, this method also wastes some liquid as it drains with impurities. Therefore, to address these issues, a self-cleaning valve with a drainage function is proposed. Summary of the Invention

[0003] To address the problems mentioned in the background art, the present invention provides a self-cleaning valve with a sewage discharge function, which solves the problems of time-consuming and laborious cleaning or liquid waste when cleaning the filter structure in the valve.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a self-cleaning valve with a sewage discharge function, comprising a valve body and an input end and an output end thereon, and further comprising: a filter media mechanism disposed on the valve body; a valve core assembly disposed in the input end and the output end for sealing the input end and the output end when the filter media mechanism is working; wherein the top of the valve body is provided with a pumping port and a discharge port;

[0005] The filter media mechanism includes a lead screw motor located at the bottom of the valve body, a connecting plate threaded to the output shaft of the lead screw motor, a scraper assembly mounted on the top of the connecting plate, an annular filter screen fixed inside the valve body, one end of the input end communicating with the inside of the annular filter screen, the top of the scraper assembly extending into the inside of the annular filter screen and fitting with the inner wall of the annular filter screen with a clearance, a push rod being provided at the top of the scraper assembly, and a downward-trending elastic piston being provided at the top of the valve body, with the bottom end of the elastic piston extending into the inside of the valve body;

[0006] The input end is also equipped with a pumping assembly, which is used to push the bottom end of the elastic piston one upward and above the pumping port, and then pump air into the valve body through the pumping port.

[0007] Preferably, the two sets of valve core assemblies include valve core bodies that are movably connected to the input end and the output end, respectively. A guide groove is provided in the middle of the valve core body. A vertical rod is fixed to the top of the connecting plate. The top of the vertical rod extends into the valve core body, and a convex shaft that can slide in the guide groove is fixed to the top of the vertical rod.

[0008] The two convex shafts move upward along the guide grooves, which can rotate the two valve core bodies and block the input and output ends.

[0009] Preferably, sealing rings are fitted at the top and bottom of both sets of valve core bodies, and the sealing rings on the two sets of valve core bodies are in contact with the inner walls of the input and output ends, respectively.

[0010] Preferably, the air pump assembly includes a hollow rod fixed to the input end, the top of the hollow rod communicating with the air pump port, and an elastic valve for sealing the outlet at the top of the hollow rod is elastically connected to the top of the hollow rod, with a convex shaft fixedly connected to the middle of the elastic valve.

[0011] The top of the vertical rod at the input end is equipped with an elastic piston two that maintains an upward trend. The top of the elastic piston two extends to the bottom of the hollow rod and is fixed with an inclined block. When the inclined block moves upward, it drives the elastic piston two to move upward and squeeze the cam shaft two away from the air pump port, thereby making the top of the hollow rod open.

[0012] Preferably, the air pump assembly can be replaced by an air pump, and the valve core assembly can be replaced by a solenoid valve.

[0013] Preferably, the scraping assembly includes a hanging rod and an inner rod. The top end of the hanging rod is located inside the valve body and can slide inside the annular filter screen. The bottom end of the hanging rod extends to the outside of the valve body. The inner rod is movably connected to the inside of the hanging rod and its bottom end extends to the bottom of the hanging rod and is fixedly connected to the connecting plate.

[0014] When the inner rod moves upward, its top end comes into contact with the hanging rod, which pushes the hanging rod upward.

[0015] Preferably, the elastic piston is also provided with a one-way valve inside, and a filter plate located below the one-way valve and directly above the push rod is fixed to the bottom of the elastic piston. The elastic piston is also provided with a constant pressure channel that communicates with the outside. The constant pressure channel can communicate with the internal cavity of the valve body in one direction through the one-way valve. When the push rod pushes the elastic piston upward, the outside gas can be input into the valve body through the one-way valve.

[0016] Preferably, the constant pressure channel is inclined and slopes downward from the inside out.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The above solution uses a screw motor to drive the connecting plate to move the scraping assembly upwards to scrape off the impurities attached to the inner wall of the annular filter screen. Then, the scraping assembly pushes the elastic piston one upwards through the push rod. When the bottom of the elastic piston one passes the air pumping port, the air pumping assembly pumps gas into the valve body through the air pumping port and blows out the impurities between the top of the scraping assembly and the elastic piston one through the discharge port, quickly completing the cleaning. This solves the problem of time-consuming and labor-intensive cleaning or liquid waste when cleaning the filter structure in the valve.

[0019] The above solution uses the connecting plate to drive the two vertical rods on it to move upward, thereby causing the cam shaft to slide in the guide groove. This forces the two valve core bodies to rotate and seal the input and output ends respectively, preventing the liquid from being discharged through the discharge port when liquid is input at the input end. At the same time, it limits the height of the liquid in the valve body to the bottom of the elastic piston. When the scraping assembly pushes the impurities upward, it can remove the impurities from the liquid, further reducing liquid waste. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a frontal perspective view of the present invention;

[0022] Figure 3 This is a side view of the present invention;

[0023] Figure 4 This is a schematic diagram of the filter media mechanism of the present invention;

[0024] Figure 5 This is a schematic diagram of the valve core body of the present invention;

[0025] Figure 6 This is a schematic diagram of the valve core assembly of the present invention;

[0026] Figure 7 This is a perspective view of the valve core body of the present invention;

[0027] Figure 8 This is a front cross-sectional view of the present invention;

[0028] Figure 9 for Figure 8 Enlarged view of point A in the middle.

[0029] In the diagram: 1. Valve body; 11. Input end; 12. Output end; 13. Air pump port; 14. Discharge port; 2. Filter media mechanism; 21. Lead screw motor; 22. Scraper assembly; 221. Hanging rod; 222. Inner rod; 23. Annular filter screen; 24. Elastic piston one; 241. Check valve; 242. Filter plate; 243. Constant pressure channel; 25. Connecting plate; 26. Top rod; 3. Valve core assembly; 31. Valve core body; 311. Sealing ring; 32. Guide groove; 33. Vertical rod; 331. Elastic piston two; 332. Inclined block; 34. Protruding shaft one; 4. Air pump assembly; 41. Hollow rod; 42. Elastic valve; 43. Protruding shaft two. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1 to 9 As shown, the present invention provides a self-cleaning valve with a sewage discharge function, including a valve body 1 and an input end 11 and an output end 12 thereon, and further including: a filter media mechanism 2, which is disposed on the valve body 1; a valve core assembly 3, which is disposed in the input end 11 and the output end 12 for blocking the input end 11 and the output end 12 when the filter media mechanism 2 is working; wherein the top of the valve body 1 is provided with a pumping port 13 and a discharge port 14;

[0032] The filter media mechanism 2 includes a lead screw motor 21 located at the bottom of the valve body 1. The output shaft of the lead screw motor 21 is threadedly connected to a connecting plate 25. A scraping assembly 22 is installed on the top of the connecting plate 25. An annular filter screen 23 is fixedly connected inside the valve body 1. One end of the input end 11 communicates with the inside of the annular filter screen 23. The top end of the scraping assembly 22 extends into the inside of the annular filter screen 23 and is in clearance fit with the inner wall of the annular filter screen 23. A push rod 26 is provided at the top of the scraping assembly 22. A downward-trending elastic piston 24 is provided at the top of the valve body 1. The bottom end of the elastic piston 24 extends into the inside of the valve body 1.

[0033] The input end 11 is also provided with a pumping assembly 4. The pumping assembly 4 is used to push the bottom end of the elastic piston 24 upward with the push rod 26 and make it higher than the pumping port 13, and then pump air into the valve body 1 through the pumping port 13.

[0034] Using the above solution, the connecting plate 25 is driven by the screw motor 21 to move the scraping assembly 22 upward to scrape off the impurities attached to the inner wall of the annular filter screen 23. During the operation of the screw motor 21, the two sets of valve core assemblies 3 will start to block the input end 11 and the output end 12 respectively. Then, the scraping assembly 22 pushes the elastic piston 24 upward through the push rod 26. When the bottom of the elastic piston 24 passes the air pumping port 13, the air pumping assembly 4 pumps gas into the valve body 1 through the air pumping port 13 and blows out the impurities between the top of the scraping assembly 22 and the elastic piston 24 through the discharge port 14, quickly completing the cleaning and solving the problem of time-consuming and labor-intensive cleaning or liquid waste when cleaning the filter structure in the valve.

[0035] It is worth noting that when the push rod 26 pushes the elastic piston 24 upward, it will cause the valve body 1 to be in a negative pressure state until the bottom of the elastic piston 24 passes the discharge port 14 or the air pump port 13 and then restores balance. At the same time, during the reset process of the scraper assembly 22, the elastic piston 24 will be reset by its own elastic force. After its bottom end moves down and passes the discharge port 14 or the air pump port 13, the elastic piston 24 cannot be fully reset due to the increased gas pressure inside the valve body 1. The elastic piston 24 will only be fully reset when the valve core assembly 3 is opened.

[0036] like Figures 1-3 , Figure 5 , Figure 6 and Figure 8 As shown, the two sets of valve core assemblies 3 include valve core bodies 31 that are movably connected to the input end 11 and the output end 12 respectively. A guide groove 32 is provided in the middle of the valve core body 31. A vertical rod 33 is fixedly connected to the top of the connecting plate 25. The top end of the vertical rod 33 extends into the valve core body 31, and a convex shaft 34 that can slide in the guide groove 32 is fixedly connected to the top end of the vertical rod 33.

[0037] The two convex shafts 34 move upward along the guide groove 32, which can make the two valve core bodies 31 rotate and block the input end 11 and the output end 12.

[0038] Both sets of valve core bodies 31 are fitted with sealing rings 311 at their top and bottom ends, and the sealing rings 311 on the two sets of valve core bodies 31 are in contact with the inner walls of the input end 11 and the output end 12, respectively.

[0039] Using the above scheme, the connecting plate 25 moves upward, driving the two vertical rods 33 on it to move upward, thereby causing the convex shaft 34 to slide upward in the guide groove 32. This forces the two valve core bodies 31 to rotate and block the input end 11 and the output end 12 respectively, preventing the liquid from being discharged through the discharge port 14 when liquid is input at the input end 11. At the same time, the height of the liquid in the valve body 1 is limited to the bottom of the elastic piston 24. When the scraping assembly 22 pushes the impurities upward, the impurities can be removed from the liquid, further reducing liquid waste.

[0040] like Figures 1-3 , Figure 5 , Figure 6 and Figure 8 As shown, the air pump assembly 4 includes a hollow rod 41 fixed to the input end 11. The top of the hollow rod 41 is connected to the air pump port 13. An elastic valve 42 for sealing the top outlet of the hollow rod 41 is elastically connected to the top of the hollow rod 41. A convex shaft 43 is fixedly connected to the middle of the elastic valve 42.

[0041] The top of the vertical rod 33 located on the input end 11 is provided with an elastic piston 331 that maintains an upward trend. The top of the elastic piston 331 extends to the bottom of the hollow rod 41 and is fixed with a wedge block 332. When the wedge block 332 moves upward, it drives the elastic piston 331 to move upward and squeeze the cam shaft 43 away from the air pump port 13, thereby making the top of the hollow rod 41 open.

[0042] The air pump assembly 4 can be replaced by an air pump, and the valve core assembly 3 can be replaced by a solenoid valve.

[0043] Using the above scheme, when the vertical rod 33 located on the input end 11 moves upward, the bottom end of the second elastic piston 331 will be compressed and retracted into the vertical rod 33. When the top end of the vertical rod 33 abuts against the top end of the second elastic piston 331, the vertical rod 33 can push the second elastic piston 331 and drive the inclined block 332 upward, increasing the internal pressure of the hollow rod 41. When the inclined block 332 squeezes the second cam 43, the top end of the hollow rod 41 is connected to the air pump port 13. At this time, the gas inside the hollow rod 41 will enter the valve body 1 and discharge impurities through the discharge port 14.

[0044] It is worth noting that the operator can leave a cavity at the top of the hollow rod 41 to avoid the situation where the pressure in the cavity of the hollow rod 41 is too high and it cannot move upward.

[0045] Alternatively, the operator can install a buffer valve at the top of the hollow rod 41 in the vertical direction. The buffer valve can move upward to increase the volume of the hollow rod 41 cavity when the pressure in the cavity increases.

[0046] like Figure 1 , Figure 2 , Figure 4 , Figure 8 and Figure 9 As shown, the scraping assembly 22 includes a hanging rod 221 and an inner rod 222. The top end of the hanging rod 221 is located inside the valve body 1 and can slide inside the annular filter screen 23. The bottom end of the hanging rod 221 extends to the outside of the valve body 1. The inner rod 222 is movably connected to the inside of the hanging rod 221 and its bottom end extends below the hanging rod 221 and is fixedly connected to the connecting plate 25.

[0047] When the inner rod 222 moves upward, its top end comes into contact with the hanging rod 221 and can push the hanging rod 221 upward.

[0048] Using the above scheme, when the connecting plate 25 drives the inner rod 222 upward, the convex shaft 34 can move in the guide groove 32 and block the input end 11 and the output end 12. At this time, the inner rod 222 can push the hanging rod 221 upward, thereby preventing the liquid in the input end 11 from carrying impurities into the annular filter screen 23.

[0049] like Figure 8 and Figure 9 As shown, a one-way valve 241 is also provided inside the elastic piston 24. A filter plate 242 is fixedly connected to the bottom of the elastic piston 24, located below the one-way valve 241 and directly above the push rod 26. A constant pressure channel 243 communicating with the outside is also provided on the elastic piston 24. The constant pressure channel 243 can communicate unidirectionally with the internal cavity of the valve body 1 through the one-way valve 241. When the push rod 26 pushes the elastic piston 24 upward, the outside gas can be input into the valve body 1 through the one-way valve 241. The constant pressure channel 243 is in an inclined state and tilts downward from the inside to the outside.

[0050] Using the above scheme, when the elastic piston 24 moves upward, the valve body 1 is under negative pressure. At this time, the outside gas will enter the valve body 1 through the one-way valve 241 to ensure the pressure balance inside the valve body 1, thereby reducing the working load of the valve core body 31.

[0051] Working principle and usage process of this invention:

[0052] When the device is operating normally, the liquid enters the annular filter 23 through the input end 11, and then enters the valve body 1 through the annular filter 23 and is output through the output end 12. Impurities are retained in the annular filter 23.

[0053] When it is necessary to filter impurities in the annular filter screen 23, the connecting plate 25 is driven by the screw motor 21 to drive the scraping assembly 22 to move upward and scrape off the impurities attached to the inner wall of the annular filter screen 23. Then, the scraping assembly 22 pushes the elastic piston 24 upward through the top rod 26. When the bottom of the elastic piston 24 passes the air pumping port 13, the air pumping assembly 4 pumps gas into the valve body 1 through the air pumping port 13 and blows out the impurities between the top of the scraping assembly 22 and the elastic piston 24 through the discharge port 14 to complete the cleaning.

[0054] When the connecting plate 25 moves upward, it also drives the two vertical rods 33 on it to move upward, so that the convex shaft 34 moves upward and slides in the guide groove 32, thereby forcing the two valve core bodies 31 to rotate and block the input end 11 and the output end 12 respectively, preventing the liquid from being discharged through the discharge port 14 when liquid is input at the input end 11. At the same time, it also limits the height of the liquid in the valve body 1 to the bottom of the elastic piston 24. When the scraping assembly 22 pushes the impurities upward, it can make the impurities leave the liquid, further reducing the waste of liquid.

[0055] When the vertical rod 33 located on the input end 11 moves upward, it will also compress the bottom end of the second elastic piston 331 and retract it into the vertical rod 33. When the top end of the vertical rod 33 abuts against the top end of the second elastic piston 331, the vertical rod 33 can push the second elastic piston 331 and drive the inclined block 332 upward, increasing the internal pressure of the hollow rod 41. When the inclined block 332 squeezes the second cam 43, the top end of the hollow rod 41 is connected to the air pump port 13. At this time, the gas inside the hollow rod 41 will enter the valve body 1 and discharge the impurities through the discharge port 14.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning valve with a sewage discharge function, comprising a valve body (1) and an input end (11) and an output end (12) thereon, characterized in that, Also includes: The filter media mechanism (2) is mounted on the valve body (1); The valve core assembly (3) is disposed in the input end (11) and the output end (12) for blocking the input end (11) and the output end (12) when the filter media mechanism (2) is working. The valve body (1) has a pump air port (13) and a discharge port (14) at the top. The filter media mechanism (2) includes a screw motor (21) located at the bottom of the valve body (1). The output shaft of the screw motor (21) is threadedly connected to a connecting plate (25). A scraper assembly (22) is installed on the top of the connecting plate (25). An annular filter screen (23) is fixed inside the valve body (1). One end of the input end (11) is connected to the inside of the annular filter screen (23). The top end of the scraper assembly (22) extends into the inside of the annular filter screen (23) and is in clearance fit with the inner wall of the annular filter screen (23). A top rod (26) is provided at the top of the scraper assembly (22). A downward-trending elastic piston (24) is provided at the top of the valve body (1). The bottom end of the elastic piston (24) extends into the inside of the valve body (1). The input end (11) is also provided with a pumping assembly (4). The pumping assembly (4) is used to push the bottom end of the elastic piston (24) upward and above the pumping port (13) by the push rod (26) and then pump air into the valve body (1) through the pumping port (13).

2. The self-cleaning valve with sewage discharge function according to claim 1, characterized in that: The two sets of valve core assemblies (3) include valve core bodies (31) that are movably connected to the input end (11) and the output end (12) respectively. A guide groove (32) is provided in the middle of the valve core body (31). A vertical rod (33) is fixedly connected to the top of the connecting plate (25). The top end of the vertical rod (33) extends into the valve core body (31), and a convex shaft (34) that can slide in the guide groove (32) is fixedly connected to the top end of the vertical rod (33). The two convex shafts (34) move upward along the guide groove (32) respectively, which can rotate the two valve core bodies (31) and block the input end (11) and the output end (12).

3. The self-cleaning valve with sewage discharge function according to claim 2, characterized in that: Both valve core bodies (31) are fitted with sealing rings (311) at their top and bottom, and the sealing rings (311) on the two valve core bodies (31) are in contact with the inner walls of the input end (11) and the output end (12), respectively.

4. The self-cleaning valve with sewage discharge function according to claim 2, characterized in that: The air pump assembly (4) includes a hollow rod (41) fixed to the input end (11), the top of the hollow rod (41) is connected to the air pump port (13), and an elastic valve (42) for sealing the top outlet of the hollow rod (41) is elastically connected to the top of the hollow rod (41), and a convex shaft (43) is fixedly connected to the middle of the elastic valve (42). The top of the vertical rod (33) located on the input end (11) is provided with an elastic piston two (331) that maintains an upward trend. The top of the elastic piston two (331) extends to the bottom of the hollow rod (41) and is fixed with a wedge block (332). When the wedge block (332) moves upward, it drives the elastic piston two (331) to move upward and squeeze the cam shaft two (43) away from the air pump port (13), thereby making the top of the hollow rod (41) open.

5. The self-cleaning valve with sewage discharge function according to claim 1, characterized in that: The air pump assembly (4) can be replaced by an air pump, and the valve core assembly (3) can be replaced by a solenoid valve.

6. The self-cleaning valve with sewage discharge function according to claim 4, characterized in that: The scraping assembly (22) includes a hanging rod (221) and an inner rod (222). The top end of the hanging rod (221) is located inside the valve body (1) and can slide inside the annular filter screen (23). The bottom end of the hanging rod (221) extends to the outside of the valve body (1). The inner rod (222) is movably connected to the inside of the hanging rod (221) and its bottom end extends below the hanging rod (221) and is fixedly connected to the connecting plate (25). When the inner rod (222) moves upward, its top end comes into contact with the hanging rod (221) and can push the hanging rod (221) upward.

7. The self-cleaning valve with sewage discharge function according to claim 1, characterized in that: The elastic piston (24) is also equipped with a one-way valve (241). The bottom of the elastic piston (24) is also fixed with a filter plate (242) located below the one-way valve (241) and directly above the push rod (26). The elastic piston (24) is also provided with a constant pressure channel (243) that communicates with the outside. The constant pressure channel (243) can communicate with the internal cavity of the valve body (1) in one direction through the one-way valve (241). When the push rod (26) pushes the elastic piston (24) upward, the outside gas can be input into the valve body (1) through the one-way valve (241).

8. The self-cleaning valve with sewage discharge function according to claim 7, characterized in that: The constant pressure channel (243) is tilted and slopes downward from the inside out.

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