Self-cleaning valve with blowdown function

Abstract

The invention belongs to the technical field of valves, and discloses a self-cleaning valve with a pollution discharge function, which comprises a valve body, an input end and an output end on the valve body, and further comprises a material filtering mechanism arranged on the valve body; the valve element assembly is arranged in the input end and the output end and used for blocking the input end and the output end when the filter material mechanism works; wherein the top of the valve body is provided with an air pumping port and a discharge port. According to the scheme, the lead screw motor is operated to drive the connecting plate to drive the scraping assembly to move upwards to scrape impurities attached to the inner wall of the annular filter screen, then the scraping assembly pushes the first elastic piston to move upwards through the ejector rod, and when the bottom of the first elastic piston crosses the gas pumping opening, the gas pumping assembly pumps gas into the valve body through the gas pumping opening; and impurities located between the top of the scraping assembly and the first elastic piston are blown out through the discharging opening, cleaning is rapidly completed, and the problem that when a filtering structure in the valve is cleaned, time and labor are wasted or liquid is wasted is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and specifically relates to a self-cleaning valve with a sewage discharge function. Background Art

[0002] A valve is a device used to control the flow direction, pressure, and flow rate of the medium in a fluid system. Its core functions include truncation, regulation, diversion, safety protection, etc. In industrial and civil fluid systems, in addition to the traditional control functions, valves also undertake a filtering role. By installing a filtering structure inside the valve body, impurities are intercepted to prevent wear or blockage of downstream equipment. When such a valve has been used for a long time, impurities will accumulate in front of the filtering structure. At this time, the operator generally closes the valve and disassembles the filter screen for cleaning. Although this method has a good cleaning effect, it is time-consuming and laborious. Alternatively, the operator can set up a normally closed pipeline in front of the filtering structure of the valve body. When it is necessary to clean the filtering structure, the normally closed pipeline is opened, so that the pipeline is connected to the normally closed pipeline through the valve. At this time, the liquid will carry impurities and be discharged through the normally closed pipeline. Although this method is convenient and fast, when the liquid carries impurities and is discharged, this part of the liquid will also be wasted. Therefore, to solve the above problems, a self-cleaning valve with a sewage discharge function is proposed. Summary of the Invention

[0003] To solve the problems raised in the above 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 of the filtering structure in the valve or liquid waste.

[0004] To achieve the above object, the present invention provides the following technical solution: A self-cleaning valve with a sewage discharge function, including a valve body and its input end and output end, further including: a filter medium mechanism disposed on the valve body; a valve core assembly disposed in the input end and output end to block the input end and output end when the filter medium mechanism works; wherein a gas pumping port and a discharge port are opened at the top of the valve body; The filter medium mechanism includes a lead screw motor disposed at the bottom of the valve body. The output shaft end of the lead screw motor is threadedly connected with a connecting plate. A scraping component is installed on the top of the connecting plate. An annular filter screen is fixedly connected inside the valve body. One end of the input end is communicated with the inside of the annular filter screen. The top end of the scraping component extends into the inside of the annular filter screen and is in clearance fit with the inner wall of the annular filter screen. A top rod is provided at the top end of the scraping component. An elastic piston I with a downward trend is provided at the top of the valve body, and the bottom end of the elastic piston I extends into the valve body; A gas pumping component is further provided on the input end. The gas pumping component is used to push the bottom end of the elastic piston I upward by the top rod and pump gas into the valve body through the gas pumping port after the bottom end of the elastic piston I is higher than the gas pumping port.

[0005] Preferably, the two groups of valve core assemblies include valve core bodies respectively movably connected to the input end and the output end. A guiding groove is formed in the middle of the valve core body. A vertical rod is fixedly connected to the top of the connecting plate. The top end of the vertical rod extends into the valve core body, and a first convex shaft capable of sliding in the guiding groove is fixedly connected to the top end of the vertical rod. When the two first convex shafts respectively move upward along the guiding groove, the two valve core bodies can rotate to block the input end and the output end.

[0006] Preferably, sealing rings are sleeved on the top and bottom of the two groups of valve core bodies, and the sealing rings on the two groups of valve core bodies are respectively in contact with the inner walls of the input end and the output end.

[0007] Preferably, the air pumping assembly includes a hollow rod fixedly connected to the input end. The top of the hollow rod is communicated with the air pumping port. An elastic valve for blocking the outlet at the top of the hollow rod is elastically connected to the top of the hollow rod. A second convex shaft is fixedly connected to the middle of the elastic valve. An elastic piston II with an upward trend is arranged at the top of the vertical rod located on the input end. The top of the elastic piston II extends to the bottom of the hollow rod and is fixedly connected with an inclined block. When the inclined block moves upward, it drives the elastic piston II to move upward to squeeze the second convex shaft to move away from the air pumping port, so that the top end of the hollow rod is conducted.

[0008] Preferably, the air pumping assembly can be replaced by an air pump, and the valve core assembly can be replaced by an electromagnetic valve.

[0009] Preferably, the scraping component includes a hanging rod and an inner rod. The top end of the hanging rod is located inside the valve body and can slide in 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 inside the hanging rod and the bottom end extends below the hanging rod and is fixedly connected with the connecting plate. When the inner rod moves upward, after its top end abuts against the hanging rod, it can push the hanging rod to move upward.

[0010] Preferably, a one-way valve is further arranged inside the elastic piston I. A filter plate located below the one-way valve and directly above the ejector rod is fixedly connected to the bottom of the elastic piston I. A constant pressure channel communicated with the outside is further formed in the elastic piston I. The constant pressure channel can be unidirectionally communicated with the inner cavity of the valve body through the one-way valve. When the ejector rod pushes the elastic piston I to move upward, external gas can be input into the valve body through the one-way valve.

[0011] Preferably, the constant pressure channel is in an inclined state and slopes downward from inside to outside.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The above solution drives the connecting plate through the operation of the lead screw motor to drive the scraping component to move upward to scrape the impurities attached to the inner wall of the annular filter screen. Subsequently, the scraping component pushes the first elastic piston upward through the ejector rod. When the bottom of the first elastic piston crosses the air pumping port, the air pumping component pumps gas into the valve body through the air pumping port, and blows out the impurities between the top of the scraping component and the first elastic piston through the discharge port, quickly completing the cleaning, and solving the problem of time-consuming and laborious cleaning or liquid waste when cleaning the filtering structure in the valve; The above solution drives the two vertical rods on it to move upward through the upward movement of the connecting plate, so that the first convex shaft moves upward and slides in the guide groove, thereby forcing the two valve core bodies to rotate and block the input end and the output end respectively, avoiding the situation that the liquid will be discharged through the discharge port when the liquid is input at the input end. At the same time, the height of the liquid in the valve body is also limited to the position of the bottom of the first elastic piston. When the scraping component pushes the impurities upward, the impurities can be separated from the liquid, further reducing the waste of liquid. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front perspective view of the present invention; Figure 3 It is a side plan view of the present invention; Figure 4 It is a schematic diagram of the structure of the filter material mechanism of the present invention; Figure 5 It is a schematic diagram of the valve core body of the present invention; Figure 6 It is a schematic diagram of the structure of the valve core assembly of the present invention; Figure 7 It is a perspective view of the valve core body of the present invention; Figure 8 It is a front sectional structure schematic diagram of the present invention; Figure 9 It is Figure 8 The enlarged view of part A in

[0014] In the figure: 1. Valve body; 11. Input end; 12. Output end; 13. Air pumping port; 14. Discharge port; 2. Filter material mechanism; 21. Lead screw motor; 22. Scraping component; 221. Hanging rod; 222. Inner rod; 23. Annular filter screen; 24. First elastic piston; 241. Check valve; 242. Filter plate; 243. Constant pressure channel; 25. Connecting plate; 26. Ejector rod; 3. Valve core assembly; 31. Valve core body; 311. Sealing ring; 32. Guide groove; 33. Vertical rod; 331. Second elastic piston; 332. Inclined block; 34. First convex shaft; 4. Air pumping component; 41. Hollow rod; 42. Elastic valve; 43. Second convex shaft. Detailed Embodiments

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.

[0016] As Figures 1 to 9 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 disposed on the valve body 1; a valve core assembly 3 disposed in the input end 11 and the output end 12 to block the input end 11 and the output end 12 when the filter media mechanism 2 works; wherein a gas pumping port 13 and a discharge port 14 are opened at the top of the valve body 1; The filter media mechanism 2 includes a lead screw motor 21 disposed at the bottom of the valve body 1. A connecting plate 25 is threadedly connected to the output shaft end of the lead screw motor 21. 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 is communicated 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 top rod 26 is provided at the top end of the scraping assembly 22. An elastic piston 24 with a downward trend is provided at the top of the valve body 1. The bottom end of the elastic piston 24 extends into the valve body 1; A gas pumping assembly 4 is further provided on the input end 11. The gas pumping assembly 4 is used to push the bottom end of the elastic piston 24 upward by the top rod 26 and pump gas into the valve body 1 through the gas pumping port 13 after it is higher than the gas pumping port 13.

[0017] With the above solution, by running the lead screw motor 21 to drive the connecting plate 25 to drive the scraping assembly 22 to move upward to scrape the impurities attached to the inner wall of the annular filter screen 23. During the operation of the lead screw motor 21, the two valve core assemblies 3 will respectively start to block the input end 11 and the output end 12. Subsequently, the scraping assembly 22 pushes the elastic piston 24 upward through the top rod 26. When the bottom of the elastic piston 24 crosses the gas pumping port 13, the gas pumping assembly 4 pumps gas into the valve body 1 through the gas 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 laborious cleaning or liquid waste when cleaning the filter structure in the valve; It should be noted that when the ejector rod 26 pushes the first elastic piston 24 to move upward, the inside of the valve body 1 will be in a negative pressure state until the bottom end of the first elastic piston 24 crosses the discharge port 14 or the air pumping port 13 and then returns to equilibrium. At the same time, during the reset process of the scraping component 22, the first elastic piston 24 will reset under its own elastic force. After its bottom end moves downward and crosses the discharge port 14 or the air pumping port 13, at this time, due to the increase in the gas pressure inside the valve body 1, the first elastic piston 24 cannot be fully reset. When the valve core assembly 3 is opened, the first elastic piston 24 will be fully reset.

[0018] As Figures 1 - 3 , Figure 5 , Figure 6 and Figure 8 shown, the two groups of valve core assemblies 3 include valve core bodies 31 respectively movably connected to the input end 11 and the output end 12. A guiding groove 32 is formed 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 first convex shaft 34 capable of sliding in the guiding groove 32 is fixedly connected to the top end of the vertical rod 33; When the two first convex shafts 34 move upward along the guiding groove 32 respectively, the two valve core bodies 31 can be rotated to block the input end 11 and the output end 12; Sealing rings 311 are sleeved on the top and bottom ends of the two groups of valve core bodies 31, and the sealing rings 311 on the two groups of valve core bodies 31 are in contact with the inner walls of the input end 11 and the output end 12 respectively; With the above scheme, when the connecting plate 25 moves upward, the two vertical rods 33 thereon are driven to move upward, so that the first convex shaft 34 moves upward and slides in the guiding groove 32, thereby forcing the two valve core bodies 31 to rotate and block the input end 11 and the output end 12 respectively, avoiding the situation that the liquid input at the input end 11 will be discharged through the discharge port 14. At the same time, the height of the liquid in the valve body 1 is also limited to the position at the bottom of the first elastic piston 24. When the scraping component 22 pushes the impurities upward, the impurities can be separated from the liquid, further reducing the waste of the liquid.

[0019] As Figures 1 - 3 , Figure 5 , Figure 6 and Figure 8 shown, the air pumping component 4 includes a hollow rod 41 fixedly connected to the input end 11. The top of the hollow rod 41 is communicated with the air pumping port 13. An elastic valve 42 for blocking the top outlet of the hollow rod 41 is elastically connected to the top of the hollow rod 41. A second convex shaft 43 is fixedly connected to the middle of the elastic valve 42; A second elastic piston 331 with an upward movement tendency is arranged at the top of the vertical rod 33 located on the input end 11. The top of the second elastic piston 331 extends to the bottom of the hollow rod 41 and is fixedly connected with an inclined block 332. When the inclined block 332 moves upward, it drives the second elastic piston 331 to move upward and squeeze the second convex shaft 43 to move away from the air pumping port 13, so that the top end of the hollow rod 41 is conducted; The air pumping assembly 4 can be replaced by an air pump, and the valve core assembly 3 can be replaced by an electromagnetic valve; With the above solution, when the vertical rod 33 on the input end 11 moves upward, the bottom end of the elastic piston II 331 will also 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 elastic piston II 331, the vertical rod 33 can push the elastic piston II 331 and drive the inclined block 332 to move upward, increasing the pressure inside the hollow rod 41. When the inclined block 332 presses against the convex shaft II 43, the top end of the hollow rod 41 is communicated with the air pumping 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; It should be noted 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 to move upward; Or the operator can also set a buffer valve at the top end of the hollow rod 41 in the vertical direction. The buffer valve can move upward when the pressure in the cavity of the hollow rod 41 increases to increase the volume of the cavity of the hollow rod 41.

[0020] Such as Figure 1 、 Figure 2 、 Figure 4 、 Figure 8 and Figure 9 As shown in When the inner rod 222 moves upward and its top end abuts against the hanging rod 221, it can push the hanging rod 221 upward; With the above solution, when the connecting plate 25 drives the inner rod 222 to move upward, the convex shaft I 34 can move in the guiding 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, thus preventing the liquid in the input end 11 from carrying impurities into the annular filter screen 23.

[0021] Such as Figure 8 and Figure 9 As shown in, a check valve 241 is also arranged inside the elastic piston I 24. A filter plate 242 is fixedly connected to the bottom of the elastic piston I 24 and is located directly above the ejector rod 26 and below the check valve 241. A constant pressure channel 243 communicating with the outside is also provided on the elastic piston I 24. The constant pressure channel 243 can be unidirectionally communicated with the inner cavity of the valve body 1 through the check valve 241. When the ejector rod 26 pushes the elastic piston I 24 upward, the outside gas can be input into the valve body 1 through the check valve 241; the constant pressure channel 243 is in an inclined state and slopes downward from the inside to the outside; With the above solution, when the first elastic piston 24 moves upward, since the inside of the valve body 1 is in a negative pressure state, at this time, external 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.

[0022] The working principle and usage process of the present invention: When the device is operating normally, the liquid enters the annular filter screen 23 through the input end 11, passes through the annular filter screen 23 into the valve body 1 and is output through the output end 12, and the impurities are retained in the annular filter screen 23; When it is necessary to filter the impurities in the annular filter screen 23, the lead screw motor 21 is operated to drive the connecting plate 25 to drive the scraping component 22 to move upward to scrape the impurities attached to the inner wall of the annular filter screen 23. Subsequently, the scraping component 22 pushes the first elastic piston 24 to move upward through the ejector rod 26. When the bottom of the first elastic piston 24 crosses the air pumping port 13, the air pumping component 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 component 22 and the first elastic piston 24 through the discharge port 14 to complete the cleaning; When the connecting plate 25 moves upward, it will also drive the two vertical rods 33 thereon to move upward, so that the first 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, avoiding the situation that the liquid input at the input end 11 will be discharged through the discharge port 14, and at the same time restricting the height of the liquid in the valve body 1 to the position of the bottom of the first elastic piston 24. When the scraping component 22 pushes the impurities upward, the impurities can be separated from the liquid, further reducing the waste of the liquid; When the vertical rod 33 located on the input end 11 moves upward, the bottom end of the second elastic piston 331 will also 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 to move upward, increasing the pressure inside the hollow rod 41. When the inclined block 332 presses the second convex shaft 43, the top end of the hollow rod 41 is communicated with the air pumping port 13, and at this time, the gas inside the hollow rod 41 will enter the valve body 1 to discharge the impurities through the discharge port 14.

[0023] 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.

[0024] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate 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 self-cleaning valve with sewage discharge function, comprising a valve body (1) and an input end (11) and an output end (12) thereon, characterized in that, It further includes: A filter media mechanism (2) which is arranged on the valve body (1); A valve core assembly (3) which is arranged between the input end (11) and the output end (12) and is used to block the input end (11) and the output end (12) when the filter media mechanism (2) works; Wherein, a gas pumping port (13) and a discharging port (14) are opened at the top of the valve body (1); The filter media mechanism (2) includes a lead screw motor (21) arranged at the bottom of the valve body (1). A connecting plate (25) is threadedly connected to the output shaft end of the lead screw motor (21). A scraping component (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) is communicated with the inside of the annular filter screen (23). The top end of the scraping component (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 arranged at the top end of the scraping component (22). An elastic piston I (24) with a downward trend is arranged at the top of the valve body (1), and the bottom end of the elastic piston I (24) extends into the inside of the valve body (1); A gas pumping component (4) is further arranged on the input end (11). The gas pumping component (4) is used to push the bottom end of the elastic piston I (24) upward by the push rod (26) to be higher than the gas pumping port (13), and then pump gas into the valve body (1) through the gas pumping port (13).

2. The self-cleaning valve with sewage discharge function according to claim 1, characterized in that: The two groups of valve core assemblies (3) include valve core bodies (31) respectively movably connected to the input end (11) and the output end (12). A guiding groove (32) is opened 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 I (34) which can slide in the guiding groove (32) is fixedly connected to the top end of the vertical rod (33); When the two convex shafts I (34) respectively move upward along the guiding groove (32), the two valve core bodies (31) can rotate to 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: Sealing rings (311) are sleeved on the top and bottom ends of the two groups of valve core bodies (31), and the sealing rings (311) on the two groups of valve core bodies (31) are respectively in contact with the inner walls of the input end (11) and the output end (12).

4. The self-cleaning valve with sewage discharge function according to claim 2, characterized in that: The gas pumping component (4) includes a hollow rod (41) fixedly connected to the input end (11). The top of the hollow rod (41) is communicated with the gas pumping port (13). An elastic valve (42) which is used to block the top outlet of the hollow rod (41) is elastically connected to the top of the hollow rod (41). A convex shaft II (43) is fixedly connected to the middle of the elastic valve (42); An elastic piston II (331) with an upward holding trend is arranged at the top of the vertical rod (33) located on the input end (11). The top of the elastic piston II (331) extends to the bottom of the hollow rod (41) and is fixedly connected with an inclined block (332). When the inclined block (332) moves upward, it drives the elastic piston II (331) to move upward to squeeze the convex shaft II (43) to move away from the gas pumping port (13), so that the top end of the hollow rod (41) is conducted.

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

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

7. The self-cleaning valve with sewage discharge function according to claim 1, characterized in that: A check valve (241) is further provided inside the first elastic piston (24). A filter plate (242) is fixedly connected to the bottom of the first elastic piston (24), which is located below the check valve (241) and directly above the ejector rod (26). A constant pressure channel (243) communicating with the outside is further formed on the first elastic piston (24). The constant pressure channel (243) can be in one-way communication with the inner cavity of the valve body (1) through the check valve (241). When the ejector rod (26) pushes the first elastic piston (24) upward, outside air can be input into the valve body (1) through the check valve (241).

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

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