A water inlet and outlet valve for sewage treatment plants and a method of use

Abstract

The application relates to the technical field of valves, in particular to a water inlet and outlet valve for a sewage plant and a use method, which comprises a valve body, a water inlet cavity and a water outlet cavity, a filter cylinder is installed in the water outlet cavity, a valve core is installed in the filter cylinder, a blowdown pipe is installed at the bottom of the valve body, a stop block is installed in the blowdown pipe, a first driving element and a second driving element are installed at the top of the valve body, the valve can effectively prevent impurities from entering subsequent pipelines and equipment, avoid blockage and abrasion, reduce the maintenance frequency, and the valve core can be lifted and lowered by the first driving element, the flow area can be changed by adjusting the alignment degree of the communication port and the water inlet cavity, the flow can be flexibly controlled, and when blowdown is performed, the blowdown pipe can be opened by lowering the stop block driven by the second driving element, so that the valve does not need to be disassembled, the maintenance time is greatly shortened, the use efficiency is improved, and the overall practicability is high.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to an inlet / outlet valve for a wastewater treatment plant and its usage method. Background Technology

[0002] In the operation of wastewater treatment plants, inlet and outlet valves are key components controlling wastewater flow, and their performance directly affects the stability and efficiency of the wastewater treatment process. Currently, the design of traditional wastewater treatment plant inlet and outlet valves has significant shortcomings in terms of core on / off control and impurity handling: on the one hand, most valves do not integrate a dedicated filtration structure, and impurities such as silt and fibers carried in the wastewater can easily enter subsequent pipelines or treatment equipment with the water flow. Long-term accumulation will cause pipeline blockage, equipment wear, and increase maintenance frequency and costs; even if a few valves have added filtration components, the lack of convenient sewage discharge channels and supporting structures means that the valve body must be disassembled to clean impurities. This is not only complicated and time-consuming, but it also interrupts the wastewater treatment process, seriously affecting the operating efficiency of the wastewater treatment plant and increasing maintenance costs. Therefore, this invention proposes an inlet and outlet valve for wastewater treatment plants and its usage method. Summary of the Invention

[0003] The purpose of this invention is to provide an inlet and outlet valve for a wastewater treatment plant and a method of using it, which can filter wastewater and discharge it efficiently, thereby improving efficiency.

[0004] To achieve the above objectives, the first technical solution provided by this invention is as follows:

[0005] A wastewater treatment plant inlet and outlet valve includes a valve body with an inlet chamber and an outlet chamber inside, the inlet chamber being located above the outlet chamber. Both the inlet and outlet chambers are connected to an installation pipe. A filter cylinder with filter holes on its sidewalls and open at both ends is installed inside the outlet chamber. A locking assembly is installed at the bottom of the filter cylinder. A hollow valve core with an open bottom is slidably connected inside the filter cylinder. A communication port is opened on one side wall of the valve core near the inlet chamber. A drain pipe is installed at the bottom of the valve body and is connected to the bottom of the locking assembly. A stop block is slidably installed inside the drain pipe. A first limiting hole is opened on one side wall at the lower end of the valve core, and a second limiting hole is opened on one side wall of the stop block, with the second limiting hole opposite to the first limiting hole. A first driving component for raising and lowering the valve core and a second driving component for driving the stop block are respectively installed on the top of the valve body.

[0006] When the valve body is in operation with water flowing through it, the second locking member of the locking assembly is inserted into the second limiting hole. When the valve body is in operation with sewage discharge, the first locking member of the locking assembly is inserted into the first limiting hole.

[0007] Preferably, the locking assembly includes an internally hollow annular fixing seat. A first locking member and a second locking member are respectively installed inside the annular fixing seat on opposite sides. The first locking member and the second locking member each include a limiting post one and a limiting post two, and one end of the limiting post one and the limiting post two both protrude through the inner ring of the annular fixing seat. A connecting strip is connected between the ends of the limiting post one and the limiting post two located inside the annular fixing seat, and a spring is connected between the connecting strip and the inner wall of the annular fixing seat.

[0008] When the valve body is in operation with water flow, the second locking pin of the second locking member is inserted into the second limiting hole. When the valve body is in operation with sewage discharge, the first locking pin of the first locking member is inserted into the first limiting hole.

[0009] Preferably, the valve core includes a first cylinder and a second cylinder that are interconnected, and the diameter of the second cylinder is smaller than the diameter of the first cylinder and is located below the first cylinder. The first cylinder has a communication opening on its side wall and abuts against the inner wall of the filter cylinder. The second cylinder has a first limiting hole on its side wall. An annular brush that abuts against the inner wall of the filter cylinder is installed on the outer wall of the second cylinder, and the first limiting hole is located below the annular brush.

[0010] Preferably, the top of the inner ring of the annular fixing seat is provided with a downward inclined surface.

[0011] Preferably, the first driving component includes a first screw and a nut that cooperate with each other. The nut is installed on the top of the inner cavity of the valve core. The top of the first screw passes through the inner cavity of the nut and is connected to a first rotating rod. Both the first rotating rod and the first screw have through structures inside. The first rotating rod passes through the top of the valve body and is connected to a first handwheel.

[0012] The second driving component includes a second screw threadedly connected to the stop block, and the top of the second screw passes through the inner cavity of the first screw and the first rotating rod in sequence and is connected to a second handwheel.

[0013] Preferably, the first cylinder and the second cylinder are rotatably connected, the bottom of the first screw passes through a nut and is connected to a limit block, the bottom of the limit block is connected to a telescopic rod, and the telescopic rod is connected to the top of the second cylinder.

[0014] Preferably, the first limiting hole is a strip groove extending along the axial direction of the second cylinder, and the angle of the strip groove is 40 degrees to 60 degrees.

[0015] Preferably, the sewage pipe is a reducing pipe, and the smaller diameter end of the sewage pipe is connected to the locking assembly. The stop block is adapted to the inner wall of the smaller diameter end of the sewage pipe. A fixing strip is connected between the inner walls of the larger diameter end of the sewage pipe and the fixing strip is slidably connected to a sliding rod. One end of the sliding rod is connected to the bottom of the stop block.

[0016] Preferably, the top of the baffle is provided with a conical drain head, the bottom of the baffle is connected to a scraper ring, and the scraper ring is interference-fitted with the inner wall of the drain pipe.

[0017] The second technical solution of the present invention is:

[0018] A method for using inlet and outlet valves in a wastewater treatment plant includes the following steps:

[0019] When the inlet and outlet valves are in operation, the valve core is driven to rise by the first driving component, so that the connecting port is connected to the inlet chamber. Sewage flows into the filter cylinder through the inlet chamber and the connecting port for filtration and is discharged from the outlet chamber. At this time, the block is locked and fixed by the second locking component of the locking assembly.

[0020] When the inlet and outlet valves are used for sewage discharge, the valve core is driven to descend by the first driving component to close the connection port. At the same time, the annular brush cleans the inner wall of the filter cylinder, causing the filter material to fall off. After the valve core is fully closed, the stop block is driven to descend to the large diameter end of the sewage pipe by the second driving component to carry out sewage discharge. At this time, the valve core is locked and fixed by the first locking component of the locking assembly.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The valve of the present invention installs the filter cylinder in the outlet chamber, so that when sewage enters the filter cylinder from the inlet chamber through the connecting port, impurities are intercepted by the filter holes, which can effectively prevent impurities from entering subsequent pipes and equipment, avoid blockage and wear, reduce maintenance frequency, and control the valve core lifting and lowering by the first driving component. The flow area can be changed by adjusting the alignment of the connecting port and the inlet chamber, and the flow rate can be flexibly controlled. When discharging sewage, the sewage pipe can be opened by driving the baffle to descend by the second driving component. This eliminates the need to disassemble the valve, greatly shortens maintenance time, improves usage efficiency, and has strong overall practicality.

[0023] 2. In this invention, when water is flowing through, the second locking member of the locking assembly is inserted into the second limiting hole of the stop block, fixing the stop block to ensure the sewage pipe is sealed and there is no sewage leakage. Furthermore, the stop block remains stationary during water flow, thus providing a locking function and preventing accidental operation of the stop block during water flow. Conversely, when sewage is being discharged, the first locking member of the locking assembly is inserted into the first limiting hole of the valve core, fixing the valve core so that it remains stationary during sewage discharge, thus providing a locking function and preventing accidental operation of the valve core during sewage discharge. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a cross-sectional view of the inlet and outlet valves of the present invention.

[0026] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0027] Figure 3 This is a cross-sectional view of the locking assembly in the inlet / outlet valve of the present invention.

[0028] Figure 4 This is a schematic diagram of the first and second driving components and their connection structure in the inlet and outlet valves of the present invention.

[0029] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure;

[0030] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0031] Figure 7 This is a cross-sectional view of the inlet / outlet valve of the present invention when water is flowing through it.

[0032] Figure 8 This is a cross-sectional view of the inlet and outlet valves of the present invention during sewage discharge.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Valve body; 2. Inlet chamber; 3. Outlet chamber; 4. Mounting pipe; 5. Filter cartridge; 6. Locking assembly; 61. Annular fixing seat; 62. Limiting post one; 63. Limiting post two; 64. Connecting strip; 65. Spring; 7. Valve core; 71. First limiting hole; 72. First cylinder; 73. Second cylinder; 74. Annular brush; 8. Connecting port; 9. Sewage pipe; 91. Fixing strip; 92. Sliding rod; 10. Stop block; 101. Second limiting hole; 102. Conical sewage head; 103. Scraper ring; 11. First driving component; 111. First screw; 112. Nut; 113. First rotating rod; 114. First handwheel; 115. Limiting block; 116. Telescopic rod; 12. Second driving component; 121. Second screw; 122. Second handwheel. Detailed Implementation

[0035] 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.

[0036] like Figure 1-8 As shown: Embodiment 1 of the present invention is as follows:

[0037] A wastewater treatment plant inlet and outlet valve includes a valve body 1. The valve body 1 has an inlet chamber 2 and an outlet chamber 3 inside, with the inlet chamber 2 located above the outlet chamber 3. Both the inlet chamber 2 and the outlet chamber 3 are connected to an installation pipe 4. A filter cylinder 5 with filter holes on its sidewalls and open at both ends is installed inside the outlet chamber 3. A locking assembly 6 is installed at the bottom of the filter cylinder 5. A hollow valve core 7 with an open bottom is slidably connected inside the filter cylinder 5. The valve core 7 has a sidewall near the inlet chamber 2 with... The valve body 1 is provided with a connecting port 8. A drain pipe 9 is installed at the bottom of the valve body 1 and is connected to the bottom of the locking assembly 6. A stop block 10 is slidably installed inside the drain pipe 9. A first limiting hole 71 is opened on one side wall at the lower end of the valve core 7. A second limiting hole 101 is opened on one side wall of the stop block 10 and is opposite to the first limiting hole 71. A first driving member 11 that drives the valve core 7 to rise and fall and a second driving member 12 that drives the stop block 10 are respectively installed on the top of the valve body 1.

[0038] When the valve body 1 is in operation with water flow, the second locking member of the locking assembly 6 is inserted into the second limiting hole 101. When the valve body 1 is in operation with sewage discharge, the first locking member of the locking assembly 6 is inserted into the first limiting hole 71.

[0039] In this embodiment, the locking assembly 6 includes an annular fixing seat 61 with a hollow interior. A first locking member and a second locking member are respectively installed on opposite sides of the annular fixing seat 61. Both the first locking member and the second locking member include a limiting post 62 and a limiting post 63. One end of the limiting post 62 and the limiting post 63 both protrude through the inner ring of the annular fixing seat 61. A connecting strip 64 is connected between the ends of the limiting post 62 and the limiting post 63 located inside the annular fixing seat 61. A spring 65 is connected between the connecting strip 64 and the inner wall of the annular fixing seat 61.

[0040] When the valve body 1 is in operation with water flow, the second locking pin 63 of the second locking member is inserted into the second limiting hole 101. When the valve body 1 is in operation with sewage discharge, the first locking pin 62 of the first locking member is inserted into the first limiting hole 71. The annular fixing seat of the locking assembly provides the mounting base, and the elastic force of the spring can push the connecting strip, so that the limiting pin automatically passes through the inner ring of the annular fixing seat and inserts into the corresponding limiting hole. No additional power source is required, the structure is simple and the cost is low. At the same time, the spring elastic force is stable, which can ensure that the limiting pin and the limiting hole are tightly matched, the locking is reliable, and the valve core or the stop block is displaced when the working conditions are switched.

[0041] In this embodiment, the valve core 7 includes a first cylinder 72 and a second cylinder 73 that are interconnected. The diameter of the second cylinder 73 is smaller than the diameter of the first cylinder 72 and it is located below the first cylinder 72. A communication port 8 is opened on the side wall of the first cylinder 72, and the first cylinder 72 abuts against the inner wall of the filter cylinder 5. A first limiting hole 71 is opened on the side wall of the second cylinder 73. An annular brush 74 that abuts against the inner wall of the filter cylinder 5 is installed on the outer wall of the second cylinder 73, and the first limiting hole 71 is located on the annular brush 74. 4. Below, the first cylinder of the valve core (the top of the first cylinder is a sealing structure) abuts against the inner wall of the filter cylinder, which can seal the upper part of the filter cylinder and prevent unfiltered sewage from directly entering the outlet chamber; while the connecting port on the side wall of the first cylinder can be precisely connected to the inlet chamber to ensure smooth water flow; and the annular brush on the outer wall of the second cylinder abuts against the inner wall of the filter cylinder, so that when the valve core rises and falls, the brush can scrape off the impurities attached to the inner wall of the filter cylinder, prevent the filter holes from being blocked, maintain the filtration effect, and eliminate the need for additional cleaning of the inner wall of the filter cylinder.

[0042] In this embodiment, the top of the inner ring of the annular fixing seat 61 is provided with a downward inclined surface, which can guide the impurities in the filter cartridge to slide down along the inclined surface, avoid the accumulation of impurities on the top of the annular fixing seat, and ensure that the impurities can fall smoothly into the drain pipe during sewage discharge without affecting the sewage discharge efficiency.

[0043] In this embodiment, the first driving component 11 includes a first screw 111 and a nut 112 that cooperate with each other. The nut 112 is installed on the top of the inner cavity of the valve core 7. The top of the first screw 111 passes through the inner cavity of the nut 112 and is connected to a first rotating rod 113. The first rotating rod 113 and the first screw 111 are both through structures. The first rotating rod 113 passes through the top of the valve body 1 and is connected to a first handwheel 114. The first screw of the first driving component cooperates with the nut. Rotating the first handwheel can drive the valve core to rise and fall, which is simple to operate.

[0044] The second driving component 12 includes a second screw 121 threadedly connected to the stop block 10. The top of the second screw 121 passes through the inner cavity of the first screw 111 and the first rotating rod 113 in sequence and is connected to a second handwheel 122. The first rotating rod and the first screw are internally connected, providing installation space for the second screw of the second driving component, allowing the second screw to be inserted into it, achieving a compact layout of the two driving components and saving internal space of the valve body. The second screw is threadedly connected to the stop block, and the stop block can be controlled to slide by rotating the second handwheel. There is no need for a complex transmission structure, making operation convenient and space-saving.

[0045] In this embodiment, the first cylinder 72 and the second cylinder 73 are rotatably connected. The bottom of the first screw 111 passes through the nut 112 and is connected to a limit block 115. The bottom of the limit block 115 is connected to a telescopic rod 116, and the telescopic rod 116 is connected to the top of the second cylinder 73. When the first handwheel is rotated, the first screw drives the limit block to rotate, and the telescopic rod drives the second cylinder to rotate, thereby causing the annular brush to rotate and scrape off impurities from the inner wall of the filter cylinder. Compared with scraping only up and down, rotating scraping is more comprehensive and has a better cleaning effect. Moreover, the limit block can limit the lifting range of the first screw, prevent the first screw from coming out of the nut, and improve the safety and stability of the drive structure.

[0046] In this embodiment, the first limiting hole 71 is a strip-shaped groove extending along the axial direction of the second cylinder 73, and the angle of the strip-shaped groove is 40 degrees to 60 degrees. Compared with the circular hole, the angle design of the strip-shaped groove can expand the insertion range of the first limiting post. That is, even if there is a slight angular deviation when the second cylinder rotates, the first limiting post can still be smoothly inserted into the strip-shaped groove, avoiding locking jamming or failure to lock, and improving the fault tolerance and reliability of locking.

[0047] In this embodiment, the drain pipe 9 is a reducing pipe, and the small diameter end of the drain pipe 9 is connected to the locking component 6. The stop block 10 is adapted to the inner wall of the small diameter end of the drain pipe 9. A fixing strip 91 is connected between the inner walls of the large diameter end of the drain pipe 9. The fixing strip 91 is slidably connected to a sliding rod 92. One end of the sliding rod 92 is connected to the bottom of the stop block 10. The drain pipe is a reducing pipe, and the small diameter end is connected to the locking component and adapted to the stop block, which can enhance the sealing effect between the stop block and the drain pipe and reduce leakage when water flows. The large diameter end has more space, which facilitates the discharge of impurities. The fixing strip is fixed to the inner wall of the large diameter end of the drain pipe, and the sliding rod passes through the fixing strip and connects to the stop block, which can provide guidance for the sliding of the stop block, prevent the stop block from deviating when sliding, ensure that the stop block is accurately connected to the small diameter end of the drain pipe, and improve the operational stability.

[0048] In this embodiment, a conical drain head 102 is provided at the top of the baffle 10, and a scraper ring 103 is connected to the bottom of the baffle 10. The scraper ring 103 is interference-fitted with the inner wall of the drain pipe 9. The conical drain head at the top of the baffle can guide the baffle to accurately align with the small diameter end when the baffle slides upward to seal the drain pipe, avoiding poor sealing due to positional deviation, improving sealing efficiency, and preventing impurities from accumulating on the top of the baffle during sewage discharge. The scraper ring at the bottom of the baffle is interference-fitted with the inner wall of the drain pipe. When the baffle slides up and down, the scraper ring can scrape off the impurities attached to the inner wall of the drain pipe, preventing impurities from accumulating and clogging the drain pipe, ensuring unobstructed sewage discharge, and reducing the number of times the drain pipe needs maintenance.

[0049] The specific working process of the above-mentioned inlet and outlet water valves is as follows:

[0050] When installing the valve, connect the valve's inlet chamber 2 and outlet chamber 3 to the external inlet pipe and outlet pipe respectively, and connect the drain pipe 9 to the external drain outlet.

[0051] During water supply, the operator operates the first handwheel 114 of the first drive component 11, which drives the first rotating rod 113 to rotate, thereby driving the first screw 111 to rotate. The first screw 111 engages with the nut 112 at the top of the inner cavity of the valve core 7, driving the valve core 7 to slide upward along the inner wall of the filter cylinder 5 until the connecting port 8 on the side wall of the first cylinder 72 connects with the water inlet chamber 2. Sewage flows in from the water inlet chamber 2 of the valve body 1 and enters the interior of the filter cylinder 5 through the connecting port 8. Impurities in the sewage are intercepted by the filter holes on the side wall of the filter cylinder 5 and enter the water outlet chamber 3 after filtration, completing the water supply and filtration process.

[0052] Furthermore, during the water flow process, when the flow rate of sewage changes, the valve core 7 is raised or lowered by rotating the first drive component 11, thereby adjusting the overlap between the connecting port 8 and the inlet chamber 2, and thus adjusting the flow rate of the valve.

[0053] During the process of water flow through the rising valve core 7, as the valve core 7 rises and disengages from the limiting post 62 in the second locking member, the spring 65 can push the connecting bar 64 and the limiting post 63 through the inner ring of the annular fixing seat 61 and insert them into the second limiting hole 101 of the stop block 10, fixing the stop block 10 to the small diameter end of the drain pipe 9, thus sealing the drain pipe 9 (and at this time, the limiting post 63 in the first locking member will be pushed into the annular fixing seat 61 by the compression of the stop block 10, that is, the limiting post 62 will not be inserted into the first limiting hole 71 of the valve core 7), so that the stop block 10 can be kept stable during the water flow process. At the same time, by locking the stop block 10, the operator cannot operate the second driving member 12 during the water flow process (that is, the second driving member 12 is also in a locked state), thereby avoiding the problem of operator misoperation.

[0054] During sewage discharge, the first handwheel 114 of the first drive component 11 is operated to rotate the first rotating rod 113 and the first screw 111 in the opposite direction, driving the valve core 7 to slide downward along the inner wall of the filter cylinder 5 until the connecting port 8 disengages from the water inlet chamber 2, cutting off the connection between the water inlet chamber 2 and the filter cylinder 5. During this process, the annular brush 74 on the outer wall of the second cylinder 73 moves downward with the valve core 7, scraping off the impurities attached to the inner wall of the filter cylinder 5. At the same time, since the first cylinder 72 and the second cylinder 73 are rotatably connected, during the rotation of the first screw 111, the limiting block 115 can synchronously drive the telescopic rod 116 to rotate, thereby driving the second cylinder 73 and the annular brush 74 to rotate. Thus, the annular brush 74 scrapes off the impurities on the inner wall of the filter cylinder 5 while descending and rotating, achieving a more comprehensive cleaning.

[0055] After the valve core 7 moves down to the designated position (the second cylinder 73 is inserted into the inner ring of the annular fixed seat 61), the side wall of the second cylinder 73 abuts against the first limiting post 62 in the second locking member, thereby pushing the connecting strip 64 and the second limiting post 63 in the second locking member to retract into the annular fixed seat 61, so that the second limiting post 63 in the second locking member disengages from the second limiting hole 101, and the stop block 10 is released from locking;

[0056] Then, operate the second handwheel 122 of the second drive component 12 to drive the second screw 121 to rotate; the second screw 121 is threadedly engaged with the stop block 10, driving the stop block 10 to slide downward along the inner wall of the drain pipe 9; the scraping ring 103 at the bottom of the stop block 10 moves with the stop block 10 to scrape off impurities from the inner wall of the drain pipe 9; at the same time, the small diameter end of the drain pipe 9 opens, and the impurities in the filter cylinder 5 slide down the inclined surface at the top of the inner ring of the annular fixing seat 61, fall into the drain pipe 9 through the inner cavity of the annular fixing seat 61, and are then discharged from the large diameter end of the drain pipe 9, completing the sewage discharge operation.

[0057] Simultaneously, as the stop block 10 descends, it gradually disengages from the second limiting post 63 in the first locking member. This causes the second limiting post 63, the connecting strip 64, and the first limiting post 62 in the first locking member to pass through the inner ring of the annular fixing seat 61 under the restoring force of the spring 65. The first limiting post 62 then inserts into the first limiting hole 71 of the second cylinder 73, locking and fixing the valve core 7. This prevents the operator from operating the first driving member 11 during the sewage discharge process (i.e., the second driving member 12 is also in a locked state), thus avoiding the problem of operator misoperation.

[0058] After the sewage discharge is completed, operate the second handwheel 122 to rotate the second screw 121 in the opposite direction, drive the stop block 10 to slide upward, so that the stop block 10 is re-inserted into the small diameter end of the sewage pipe 9, and the stop block 10 gradually abuts against the limiting post 63 of the first locking member, thereby pushing the limiting post 63, the connecting strip 64 and the limiting post 62 of the first locking member into the annular fixed seat 61, thereby separating the limiting post 62 from the valve core 7. Then operate the first handwheel 114 to drive the valve core 7 to move upward so that the connecting port 8 connects with the water inlet chamber 2, and restore the water flow state. At this time, the limiting post 63 of the second locking member is re-inserted into the second limiting hole 101 of the stop block 10.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may 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 wastewater treatment plant inlet and outlet valve, comprising a valve body (1), wherein the valve body (1) is provided with an inlet chamber (2) and an outlet chamber (3), and the inlet chamber (2) is located above the outlet chamber (3), and both the inlet chamber (2) and the outlet chamber (3) are connected to an installation pipe (4), characterized in that: The outlet chamber (3) is equipped with a filter cylinder (5) with filter holes on the side wall and through at both ends. The bottom of the filter cylinder (5) is connected to a locking component (6). The filter cylinder (5) is slidably connected to a valve core (7) that is hollow inside and through at the bottom. The valve core (7) has a connecting port (8) on one side wall near the inlet chamber (2). The bottom of the valve body (1) is equipped with a drain pipe (9), which is connected to the bottom of the locking component (6). The drain pipe (9) is slidably installed with a stop block (10) inside the drain pipe (9). The lower side wall of the valve core (7) is provided with a first limiting hole (71). The side wall of the stop block (10) is provided with a second limiting hole (101), which is opposite to the first limiting hole (71). The top of the valve body (1) is equipped with a first driving component (11) that drives the valve core (7) to rise and fall and a second driving component (12) that drives the stop block (10). When the valve body (1) is in operation with water flow, the second locking member of the locking assembly (6) is inserted into the second limiting hole (101). When the valve body (1) is in operation with sewage discharge, the first locking member of the locking assembly (6) is inserted into the first limiting hole (71).

2. The inlet and outlet valve for a wastewater treatment plant according to claim 1, characterized in that: The locking assembly (6) includes an internally hollow annular fixing seat (61). The annular fixing seat (61) has a first locking member and a second locking member installed on opposite sides. The first locking member and the second locking member each include a limiting post one (62) and a limiting post two (63). One end of the limiting post one (62) and the limiting post two (63) both protrude through the inner ring of the annular fixing seat (61). A connecting strip (64) is connected between the ends of the limiting post one (62) and the limiting post two (63) located inside the annular fixing seat (61). A spring (65) is connected between the connecting strip (64) and the inner wall of the annular fixing seat (61). When the valve body (1) is in operation of water supply, the second locking post (63) of the second locking member is inserted into the second limiting hole (101). When the valve body (1) is in operation of sewage discharge, the first locking post (62) of the first locking member is inserted into the first limiting hole (71).

3. The inlet and outlet valve for a wastewater treatment plant according to claim 2, characterized in that: The valve core (7) includes a first cylinder (72) and a second cylinder (73) that are interconnected. The diameter of the second cylinder (73) is smaller than that of the first cylinder (72) and it is located below the first cylinder (72). A communication port (8) is opened on the side wall of the first cylinder (72), and the first cylinder (72) abuts against the inner wall of the filter cylinder (5). A first limiting hole (71) is opened on the side wall of the second cylinder (73). An annular brush (74) that abuts against the inner wall of the filter cylinder (5) is installed on the outer wall of the second cylinder (73), and the first limiting hole (71) is located below the annular brush (74).

4. The inlet and outlet valve for a sewage treatment plant according to claim 3, characterized in that: The inner ring of the annular fixing seat (61) has a downward inclined surface at the top.

5. The inlet and outlet valve for a sewage treatment plant according to claim 3, characterized in that: The first driving component (11) includes a first screw (111) and a nut (112) that cooperate with each other. The nut (112) is installed on the top of the inner cavity of the valve core (7). The top of the first screw (111) passes through the inner cavity of the nut (112) and is connected to a first rotating rod (113). The first rotating rod (113) and the first screw (111) are both through structures. The first rotating rod (113) passes through the top of the valve body (1) and is connected to a first handwheel (114). The second drive member (12) includes a second screw (121) that is threadedly connected to the stop (10). The top of the second screw (121) passes through the inner cavity of the first screw (111) and the first rotating rod (113) in sequence and is connected to a second handwheel (122).

6. The inlet and outlet valve for a sewage treatment plant according to claim 5, characterized in that: The first cylinder (72) and the second cylinder (73) are rotatably connected. The bottom of the first screw (111) passes through the nut (112) and is connected to the limit block (115). The bottom of the limit block (115) is connected to the telescopic rod (116), and the telescopic rod (116) is connected to the top of the second cylinder (73).

7. The inlet and outlet valve for a sewage treatment plant according to claim 5, characterized in that: The first limiting hole (71) is a strip groove extending along the axial direction of the second cylinder (73), and the angle of the strip groove is 40 degrees to 60 degrees.

8. The inlet and outlet valve for a sewage treatment plant according to claim 5, characterized in that: The drain pipe (9) is a variable diameter pipe, and the small diameter end of the drain pipe (9) is connected to the locking assembly (6). The stop block (10) is adapted to the inner wall of the small diameter end of the drain pipe (9). A fixing strip (91) is connected between the inner walls of the large diameter end of the drain pipe (9). The fixing strip (91) is slidably connected to a sliding rod (92). One end of the sliding rod (92) is connected to the bottom of the stop block (10).

9. The inlet and outlet valve for a sewage treatment plant according to claim 8, characterized in that: The top of the baffle (10) is provided with a conical drain head (102), and the bottom of the baffle (10) is connected to a scraper ring (103), and the scraper ring (103) is interference-fitted with the inner wall of the drain pipe (9).

10. A method of using the inlet and outlet valve for a wastewater treatment plant as described in any one of claims 1-9, characterized in that: Includes the following steps: When the inlet and outlet valves are in operation, the valve core (7) is driven to rise by the first driving component (11), so that the connecting port (8) is connected to the inlet chamber (2). Sewage flows into the filter cylinder (5) through the inlet chamber (2) and the connecting port (8) for filtration and is discharged from the outlet chamber (3). At this time, the baffle (10) is locked and fixed by the second locking component of the locking assembly (6). When the inlet and outlet valves are used for sewage discharge, the valve core (7) is driven down by the first driving component (11) to close the connecting port (8). At the same time, the annular brush (74) cleans the inner wall of the filter cylinder (5) so that the filter material falls off. After the valve core (7) is completely closed, the stop block (10) is driven down to the large diameter end of the sewage pipe (9) by the second driving component (12) to carry out sewage discharge. At this time, the valve core (7) is locked and fixed by the first locking component of the locking assembly (6).

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