Jet device for sewage treatment

Abstract

The invention relates to the technical field of sewage treatment, in particular to a jet device for sewage treatment, which comprises a jet device body, an air inlet assembly and an impurity removal assembly, a conical section, a suction section and a horn mouth are formed in the jet device body, and the conical section, the suction section and the horn mouth are sequentially connected end to end; the air inlet assembly comprises a first conical pipe, the first conical pipe penetrates through the ejector body, one end of the first conical pipe faces the suction section, and the axis of the first conical pipe is located on the side face of the axis of the suction section. The impurity removal assembly comprises a water inlet pipe, a second conical pipe, a bent pipe, a filter cartridge and a main pipe, the inner wall of the water inlet pipe is slidably connected with the filter cartridge, the included angle between the first conical pipe and the suction section is small, and it is avoided that the included angle between airflow and water flow is too large, channel resistance is large, and the speed of water flow sprayed out of a water outlet is affected; and the gas-liquid mixing effect can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to an ejector for sewage treatment. Background Art

[0002] Sewage treatment refers to the process of purifying sewage to meet the water quality requirements for discharge into a certain water body or reuse. Sewage treatment is widely used in various fields such as medical care and catering, and is increasingly entering the daily life of ordinary people. In the process of sewage treatment, an aeration ejector is used. The aeration ejector is generally connected to the air pipe through the connection with the water pump to realize water jet and produce fine bubbles. The air in the bubbles is fully in contact with the water, and oxygen is dissolved in the water, thereby achieving the effect of aeration. It is widely used in solution mixing, sewage treatment, etc. In the sewage treatment process, the ejector has the advantages of high mass transfer efficiency, low energy consumption, and not easy to clog. It is widely used in deep well aeration and high activated sludge concentration occasions. In sewage treatment, the aeration ejector mainly cuts the air into tiny bubbles through the ejector, fully mixes with the sewage, increases the dissolved oxygen content, and provides oxygen for the growth and metabolism of microorganisms. The tiny bubbles generated by the ejector are combined with the suspended particles in the sewage to make the particles float to the water surface, which is convenient for solid-liquid separation.

[0003] At present, the Chinese utility model application number CN201921887982.5 discloses a flat-mouthed ejector for sewage treatment. Although the double flat-mouthed inclined air inlet pipe design ensures that the ejector has high power efficiency and scale is not easily generated inside, it is difficult to inject the airflow into the suction chamber at high speed, resulting in poor gas-liquid mixing effect. In addition, the angle between the airflow and the water flow is too large, resulting in large channel resistance, affecting the speed of water ejected from the outlet, and after the sediment in the sewage is stirred up, it is repeatedly sprayed in the sewage, affecting the sewage treatment effect and easily clogging the ejector. Summary of the invention

[0004] The technical problem to be solved by the present invention is: the ejector in the related technology is difficult to eject the airflow into the suction chamber at a high speed, resulting in a poor gas-liquid mixing effect; in addition, the angle between the airflow and the water flow is too large, resulting in a large channel resistance, affecting the speed of the water flow ejected from the outlet, and after the sediment in the sewage is stirred up, it is repeatedly ejected in the sewage, affecting the sewage treatment effect and easily clogging the ejector.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an ejector for sewage treatment, comprising an ejector body, an air intake component and an impurity removal component; The ejector body is provided with a conical section, a suction section and a bell mouth, and the conical section, the suction section and the bell mouth are connected end to end in sequence; The air intake assembly comprises a first tapered tube, the first tapered tube passes through the ejector body, one end of the first tapered tube faces the suction section, and the axis of the first tapered tube is located on the side of the axis of the suction section; The impurity removal component includes an inlet pipe, a second conical pipe, a bent pipe, a filter cartridge and a main pipe. The inner wall of the inlet pipe is slidably connected to the filter cartridge. The inlet pipe is fixedly connected to one end of the bent pipe through the second conical pipe. The other end of the bent pipe is slidably connected to the main pipe. The main pipe is connected to the other end of the first conical pipe.

[0006] As a preferred solution of the ejector for sewage treatment of the present invention, more than one first conical tube is provided, and one end of each first conical tube toward the suction section approaches the bell mouth in sequence.

[0007] As a preferred solution of the ejector for sewage treatment of the present invention, the main pipe is fixedly connected to the first fixed pipe, the first fixed pipe faces the connecting portion between one of the first conical pipes and the main pipe, and the connecting portion between the first fixed pipe and the first conical pipe and the main pipe has the same radial size, and the inner wall of the first fixed pipe is slidably connected to the bent pipe.

[0008] As a preferred solution of the ejector for sewage treatment described in the present invention, the main pipe is fixedly connected to the outer wall of the ejector body, the second fixed pipe and the third fixed pipe are fixedly connected on both sides of the main pipe, and the axes of the second fixed pipe and the third fixed pipe are located on the same straight line, the inner wall of the second fixed pipe is slidably connected to the movable rod, and the third fixed pipe is fixedly connected to one end of the air inlet pipe.

[0009] As a preferred solution of the ejector for sewage treatment of the present invention, one end of the movable rod is fixedly connected to the first telescopic rod, and the first telescopic rod is fixedly connected to the outer wall of the ejector body through a first fixing seat.

[0010] As a preferred solution of the ejector for sewage treatment of the present invention, the bent pipe is fixedly connected to one end of the second telescopic rod, and the second telescopic rod is fixedly connected to the outer wall of the ejector body through the second mounting seat.

[0011] As a preferred solution of the ejector for sewage treatment described in the present invention, a limiting tube is fixedly connected to the first fixed tube, a movable plate is provided on the inner side of the portion communicating with the first fixed tube, the movable plate is slidably connected to the inner wall of the limiting tube, the movable plate is arranged in the radial direction of the first fixed tube, and is located between the bent tube and the first conical tube; the movable plate is fixedly connected to the third telescopic rod, and the third telescopic rod is fixedly connected to the outer wall of the main tube through a third mounting seat.

[0012] As a preferred solution of the ejector for sewage treatment described in the present invention, the third telescopic rod includes a fixed end, a first piston head and a movable end, one end of the movable end is fixedly connected to the movable plate, the other end of the movable end is fixedly connected to the first piston head, the first piston head is slidably connected to the inner wall of the fixed end, and the outer wall of the fixed end is fixedly connected to the outer wall of the main pipe through the third mounting seat.

[0013] As a preferred solution of the sewage treatment ejector described in the present invention, it also includes a control component, which includes a control tube, a second piston head, an electric telescopic rod, a first connecting tube, a second connecting tube and a third connecting tube. The outer wall of the control tube is fixedly connected to the outer wall of the ejector body, the inner end wall of the control tube is fixedly connected to one end of the electric telescopic rod, the other end of the electric telescopic rod is fixedly connected to the second piston head, the second piston head is slidably connected to the inner wall of the control tube, and the cavity on one side of the control tube deviating from the electric telescopic rod is respectively fixedly connected to the first connecting tube, the second connecting tube and one end of the third connecting tube, the other end of the first connecting tube is fixedly connected to the air inlet end of the first telescopic rod, the other end of the second connecting tube is fixedly connected to the air inlet end of the second telescopic rod, and the other end of the third connecting tube is fixedly connected to the air inlet end on the side of the fixed end deviating from the movable end.

[0014] As a preferred solution of the ejector for sewage treatment described in the present invention, an annular groove is opened on the water inlet pipe, and the inner wall of the annular groove is fixedly connected to a magnet ring. The filter cylinder includes a mounting ring and a conical mesh cylinder, and the conical mesh cylinder is fixedly connected to the mounting ring, and the mounting ring is slidably connected to the inner wall of the annular groove.

[0015] Beneficial effects of the present invention: The angle between the first tapered tube and the suction section in the present invention is small, which is beneficial to avoid excessively large angles between the airflow and the waterflow, resulting in large channel resistance, affecting the speed of water spraying out of the water outlet, and is beneficial to improving the gas-liquid mixing effect.

[0016] When the ejector body sprays water, according to the Venturi effect, it can attract water flow from the water inlet pipe into the second conical tube, pass through the bend pipe, enter the first conical tube and then enter the suction section. At this time, the water flow sucked into the water inlet pipe passes through the filter cartridge to filter out the stirred sediment, preventing the sewage from being repeatedly sprayed to affect the sewage treatment effect and clogging the ejector. Compared with the prior art method of adding a filter screen to the water inlet of the water pump for filtration, the present invention uses the Venturi effect to filter out the stirred sediment at the water inlet position, which is conducive to preventing the water pump from being blocked, and will not cause the water pumping efficiency of the water pump to decrease due to excessive impurities accumulated at the filter screen at the water inlet of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present disclosure.

[0018] Figure 2 It is a cross-sectional view of the ejector body in the embodiment of the present disclosure.

[0019] Figure 3 In the embodiment of the present disclosure Figure 2 Enlarged schematic diagram of point B in the middle.

[0020] Figure 4 Schematic diagram of the positions of the first conical tubes in the embodiment of the present disclosure.

[0021] Figure 5 It is a cross-sectional view of the water inlet pipe in the embodiment of the present disclosure.

[0022] Figure 6 It is a schematic diagram of the filter cartridge structure in the embodiment of the present disclosure.

[0023] Figure 7 In the embodiment of the present disclosure Figure 1 Enlarged schematic diagram at point A in the middle.

[0024] Figure 8 It is a cross-sectional view of the third telescopic rod in the embodiment of the present disclosure.

[0025] Fig. 9 It is a cross-sectional view of the first fixed tube in the embodiment of the present disclosure.

[0026] Fig.10 4 is a cross-sectional view of a control component in an embodiment of the present disclosure.

[0027] Figure numerals: 1- ejector body, 11- conical section, 12- inlet section, 13- bell mouth, 2- air intake assembly, 21- first conical tube, 3- impurity removal assembly, 31- water inlet pipe, 311- annular groove, 312- magnet ring, 32- second conical tube, 33- elbow, 331- second telescopic rod, 3311- second mounting seat, 332- fixed end, 333- first piston head, 334- movable end, 34- filter cartridge, 341- mounting ring, 342- conical net cylinder, 35- Main pipe, 351-first fixed pipe, 352-second fixed pipe, 353-third fixed pipe, 3531-limiting pipe, 3532-movable plate, 3533-third telescopic rod, 3534-third mounting seat, 354-movable rod, 355-inlet pipe, 356-first telescopic rod, 357-first fixed seat, 4-control assembly, 41-control pipe, 42-second piston head, 43-electric telescopic rod, 44-first connecting pipe, 45-second connecting pipe, 46-third connecting pipe. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] Example 1, reference Figure 1-Figure 5, this embodiment provides an ejector for sewage treatment: comprising an ejector body 1, an air intake component 2 and an impurity removal component 3; The ejector body 1 is provided with a conical section 11, a suction section 12 and a bell mouth 13, and the conical section 11, the suction section 12 and the bell mouth 13 are connected end to end in sequence; In this embodiment, preferably, the ejector body 1 is Figure 1 The left end is connected to an existing water pump, which connects the water flow to the inside of the ejector body 1. The water flow speeds up after passing through the conical section 11, and the ejected water flow is conveniently guided through the bell mouth 13.

[0030] The air intake assembly 2 includes a first tapered tube 21, the first tapered tube 21 passes through the ejector body 1, and one end of the first tapered tube 21 faces the suction section 12, and the axis of the first tapered tube 21 is located on the side of the axis of the suction section 12; In this embodiment, preferably, air enters the first conical tube 21 and then enters the suction section 12, and then enters the bell mouth 13 and is ejected after mixing with the water flow in the suction section 12. In this embodiment, the angle between the first conical tube 21 and the suction section 12 is small, which is beneficial to avoid the angle between the air flow and the water flow being too large, resulting in large channel resistance, affecting the speed of the water flow ejected from the water outlet, and is beneficial to improving the effect of gas-liquid mixing. The axis of the first conical tube 21 is located on the side of the axis of the suction section 12, such as Figure 4 As shown, the air flow direction entering the suction section 12 is not parallel to the axis of the suction section 12, but moves forward in a spiral along the inner wall of the suction section 12, similar to rifling, giving the airflow a rotation angle, which is beneficial to improving the gas-liquid mixing effect, and after entering the bell mouth 13, it is easier to diffuse under the action of the spiral forward movement, which can not only achieve the cleaning of the inner wall of the bell mouth 13, but also improve the aeration effect.

[0031] The impurity removal component 3 includes an inlet pipe 31, a second conical pipe 32, a bent pipe 33, a filter cartridge 34 and a main pipe 35. The inner wall of the inlet pipe 31 is slidably connected to the filter cartridge 34. The inlet pipe 31 is fixedly connected to one end of the bent pipe 33 through the second conical pipe 32. The other end of the bent pipe 33 is slidably connected to the main pipe 35. The main pipe 35 is connected to the other end of the first conical pipe 21.

[0032] In this embodiment, it is preferred that when the ejector body 1 sprays water, according to the Venturi effect, it can attract water from the water inlet pipe 31 into the second conical pipe 32, pass through the bend pipe 33, enter the first conical pipe 21, and then enter the suction section 12. At this time, the water sucked into the water inlet pipe 31 passes through the filter cartridge 34 to filter out the stirred sediment, prevent the sewage from being repeatedly sprayed to affect the sewage treatment effect, and avoid clogging the ejector. Compared with the method of filtering by adding a filter screen at the water inlet of the water pump in the prior art, the present invention uses the Venturi effect to filter out the stirred sediment at the position of the water inlet pipe 31, which is conducive to preventing the water pump from being blocked, and will not cause the water pumping efficiency of the water pump to decrease due to excessive impurities accumulated at the filter screen at the water inlet of the water pump.

[0033] Example 2, reference Figure 1-Figure 10 This embodiment is based on the previous embodiment, and differs from the previous embodiment in that: Reference Figure 4 There are more than one first tapered tube 21 , and one end of each first tapered tube 21 facing the suction section 12 is adjacent to the bell mouth 13 in sequence.

[0034] In the present embodiment, preferably, a plurality of first conical tubes 21 are provided, and each first conical tube 21 is successively close to the bell mouth 13 at one end facing the suction section 12, so that the air entering the suction section 12 enters in multiple times, which is conducive to generating finer bubbles, thereby improving the gas-liquid mixing effect. In the present embodiment, there are 4 first conical tubes 21, which are evenly arranged around the suction section 12, and each of them is successively close to the bell mouth 13, so that the airflow entering from one end of the first conical tube 21 close to the bell mouth 13 can be pushed by the airflow entering from one end of the first conical tube 21 away from the bell mouth 13, which is conducive to further improving the speed of the gas-liquid mixed fluid and ensuring that the ejector has a large power efficiency.

[0035] Reference Figure 3 The main pipe 35 is fixedly connected to the first fixed pipe 351, the first fixed pipe 351 faces the connecting portion between one of the first tapered pipes 21 and the main pipe 35, and the radial dimensions of the first fixed pipe 351 and the connecting portion between the first tapered pipe 21 and the main pipe 35 are the same, and the inner wall of the first fixed pipe 351 is slidably connected to the bent pipe 33.

[0036] In this embodiment, the elbow 33 can slide in the first fixed pipe 351. When the elbow 33 moves toward the direction close to the first conical pipe 21, after the elbow 33 is inserted into the first conical pipe 21, air cannot enter the first conical pipe 21. Under the action of the Venturi effect, the suction section 12 can attract water from the water inlet pipe 31 into the second conical pipe 32, and then enter the first conical pipe 21 and then the suction section 12 after passing through the elbow 33. At this time, the water inhaled by the water inlet pipe 31 passes through the filter cartridge 34 to filter out the stirred sediment, prevent the sewage from being repeatedly ejected to affect the sewage treatment effect, and avoid clogging the ejector. Compared with the prior art method of filtering by adding a filter screen at the water inlet of the water pump, the present invention uses the Venturi effect to filter out the stirred sediment at the position of the water inlet pipe 31, which is conducive to preventing the water pump from being blocked, and there will be no problem of excessive impurities accumulated at the filter screen at the water inlet of the water pump, resulting in a decrease in the efficiency of the water pump.

[0037] Reference Figure 1 The main pipe 35 is fixedly connected to the outer wall of the ejector body 1, and the second fixed pipe 352 and the third fixed pipe 353 are fixedly connected on both sides of the main pipe 35, and the axes of the second fixed pipe 352 and the third fixed pipe 353 are located on the same straight line, the inner wall of the second fixed pipe 352 is slidably connected to the movable rod 354, and the third fixed pipe 353 is fixedly connected to one end of the intake pipe 355.

[0038] Preferably, in this embodiment, the movable rod 354 can slide on the inner wall of the second fixed pipe 352, and the other end of the air inlet pipe 355 is above the water surface. When the movable rod 354 is inserted into the third fixed pipe 353, the air in the air inlet pipe 355 can be prevented from entering the main pipe 35. At this time, after the end of the bent pipe 33 is inserted into the first conical pipe 21, the first conical pipe 21 can be closed, and air cannot enter the first conical pipe 21. At this time, the Venturi effect acts on the first conical pipe 21 inserted into the end of the bent pipe 33, and the suction section 12 can attract water flow from the water inlet pipe 31 into the second conical pipe 32, and then enter the first conical pipe 21 and then enter the suction section 12 after passing through the bent pipe 33. At this time, the water flow sucked into the water inlet pipe 31 passes through the filter cartridge 34, and the stirred sediment is filtered out to prevent repeated injection in the sewage from affecting the sewage treatment effect and avoiding clogging of the ejector.

[0039] Reference Figure 1 and Figure 7 One end of the movable rod 354 away from the second fixed tube 352 is fixedly connected to the telescopic end of the first telescopic rod 356 , and the fixed end of the first telescopic rod 356 is fixedly connected to the outer wall of the ejector body 1 through the first fixed seat 357 .

[0040] In this embodiment, the first telescopic rod 356 can drive the movable rod 354 to move when working, and the movable rod 354 can slide along the inner wall of the second fixed tube 352. The first fixing seat 357 can fix the first telescopic rod 356.

[0041] Reference Figure 1 and Figure 7 The bent pipe 33 is fixedly connected to the telescopic end of the second telescopic rod 331 , and the fixed end of the second telescopic rod 331 is fixedly connected to the outer wall of the ejector body 1 through the second mounting seat 3311 .

[0042] Preferably, in this embodiment, when the telescopic end of the second telescopic rod 331 is extended, it can drive the curved tube 33 to move, so that the curved tube 33 slides on the inner wall of the first fixed tube 351 .

[0043] Reference Fig. 9 The first fixed tube 351 is fixedly connected to a limiting tube 3531, and a movable plate 3532 is provided on the inner side of the portion connecting the limiting tube 3531 and the first fixed tube 351. The movable plate 3532 is slidably connected to the inner wall of the limiting tube 3531, and the movable plate 3532 is arranged in the radial direction of the first fixed tube 351 and is located between the bent tube 33 and the first tapered tube 21; one side of the movable plate 3532 is fixedly connected to the telescopic end of the third telescopic rod 3533, and the fixed end of the third telescopic rod 3533 is fixedly connected to the outer wall of the main tube 35 through the third mounting seat 3534.

[0044] Preferably, in this embodiment, when the third telescopic rod 3533 performs telescopic movement, it can drive the movable plate 3532 to slide on the inner wall of the limiting tube 3531. When the third telescopic rod 3533 is extended, it drives the movable plate 3532 to close the first fixed tube 351, and air cannot enter the first fixed tube 351; when the third telescopic rod 3533 is retracted, it drives the movable plate 3532 to move and open the first fixed tube 351, and air can enter the first fixed tube 351.

[0045] Reference Figure 8 The third telescopic rod 3533 includes a fixed end 332, a first piston head 333 and a movable end 334, one end of the movable end 334 is fixedly connected to the movable plate 3532, and the other end of the movable end 334 is fixedly connected to the first piston head 333, the first piston head 333 is slidably connected to the inner wall of the fixed end 332, and the outer wall of the fixed end 332 is fixedly connected to the outer wall of the main pipe 35 through the third mounting seat 3534.

[0046] Preferably in this embodiment, when the first piston head 333 moves, it can drive the movable end 334 to move, and the movable end 334 can drive the movable plate 3532 to move. When the movable end 334 extends, it drives the movable plate 3532 to close the first fixed tube 351, and air cannot enter the first fixed tube 351 at this time; when the movable end 334 contracts, it drives the movable plate 3532 to move and open the first fixed tube 351, and air can enter the first fixed tube 351 at this time.

[0047] Reference Fig.10, and also includes a control component 4, which includes a control tube 41, a second piston head 42, an electric telescopic rod 43, a first connecting tube 44, a second connecting tube 45 and a third connecting tube 46. The outer wall of the control tube 41 is fixedly connected to the outer wall of the ejector body 1, the inner end wall of the control tube 41 is fixedly connected to the fixed end of the electric telescopic rod 43, the telescopic end of the electric telescopic rod 43 is fixedly connected to the second piston head 42, and the second piston head 42 is slidably connected to the inner wall of the control tube 41. The cavity of the control tube 41 on one side deviating from the electric telescopic rod 43 is respectively fixedly connected to the first connecting tube 44, the second connecting tube 45 and one end of the third connecting tube 46. The other end of the first connecting tube 44 is fixedly connected to the air inlet end of the first telescopic rod 356, the other end of the second connecting tube 45 is fixedly connected to the air inlet end of the second telescopic rod 331, and the other end of the third connecting tube 46 is fixedly connected to the air inlet end of the fixed end 332 deviated from the movable end 334; thereby, a mechanism is formed in which the first telescopic rod 356, the second telescopic rod 331 and the third telescopic rod 3533 are respectively driven to extend and retract by gas.

[0048] In this embodiment, the electric telescopic rod 43 is preferably capable of driving the second piston head 42 to move when working. Fig.10 The air on the left side of the middle control tube 41 is squeezed, and the air enters the first connecting tube 44, the second connecting tube 45 and the third connecting tube 46. At this time, the first telescopic rod 356 and the second telescopic rod 331 are extended, and the air enters the inner cavity of the fixed end 332 toward the movable end 334 from the third connecting tube 46, pushing the first piston head 333 to Figure 8 The first piston head 333 drives the movable end 334 to contract, and the movable end 334 drives the movable plate 3532 to move, opening the first fixed tube 351, and air can enter the first fixed tube 351. In this embodiment, the radial dimension of the fixed end 332 is smaller than the radial dimension of the second telescopic rod 331. Therefore, after the first piston head 333 drives the movable end 334 to contract, the second telescopic rod 331 drives the curved tube 33 to slide on the inner wall of the first fixed tube 351 to the position of the movable plate 3532, so as to prevent the curved tube 33 and the movable plate 3532 from colliding.

[0049] Reference Figure 5 and Figure 6 An annular groove 311 is provided on the water inlet pipe 31, and the inner wall of the annular groove 311 is fixedly connected to a magnet ring 312. The filter cartridge 34 includes a mounting ring 341 and a conical mesh cylinder 342. The conical mesh cylinder 342 is fixedly connected to the mounting ring 341, and the mounting ring 341 is slidably connected to the inner wall of the annular groove 311.

[0050] In this embodiment, preferably, the mounting ring 341 can slide into the annular groove 311. The mounting ring 341 is made of iron. The magnet ring 312 adsorbs the mounting ring 341 to prevent the mounting ring 341 and the conical mesh tube 342 from accidentally falling off. The conical mesh tube 342 can filter out the stirred sediment, and the sediment will first be concentrated at the tip of the conical mesh tube 342, while the edge of the conical mesh tube 342 can still pass through the water flow. Compared with the existing flat filter, it is not easy to be blocked.

[0051] When the stirred-up sediment needs to be cleaned and filtered out, the electric telescopic rod 43 is extended to drive the second piston head 42 to move. Fig.10 The air on the left side of the middle control tube 41 is squeezed, and the air enters the first connecting tube 44, the second connecting tube 45 and the third connecting tube 46. At this time, the first telescopic rod 356 and the second telescopic rod 331 are extended, and the extension of the first telescopic rod 356 drives the movable rod 354 to move. When the movable rod 354 is inserted into the third fixed tube 353, it can prevent the air in the intake pipe 355 from entering, thereby completely isolating the entry of air.

[0052] The second telescopic rod 331 extends, driving the bend pipe 33 to move toward the first conical tube 21. After the bend pipe 33 is inserted into the first conical tube 21, air cannot enter the first conical tube 21. Under the action of the Venturi effect, the suction section 12 can attract water from the water inlet pipe 31 into the second conical tube 32, and then enter the first conical tube 21 and then the suction section 12 after passing through the bend pipe 33. At this time, the water inhaled by the water inlet pipe 31 passes through the filter cartridge 34 to filter out the stirred sediment, preventing the sewage from being repeatedly ejected to affect the sewage treatment effect and clogging the ejector. Compared with the prior art method of filtering by adding a filter screen at the water inlet of the water pump, the present invention uses the Venturi effect to filter out the stirred sediment at the position of the water inlet pipe 31, which is conducive to preventing the water pump from being blocked, and there will be no problem of excessive impurities accumulated at the filter screen at the water inlet of the water pump, resulting in a decrease in the pumping efficiency of the water pump.

[0053] At the same time, air enters the inner cavity of the fixed end 332 toward the movable end 334 from the third connecting pipe 46, pushing the first piston head 333 to move toward the inner cavity. Figure 8 The first piston head 333 drives the movable end 334 to contract, and the movable end 334 drives the movable plate 3532 to move, thereby opening the first fixed tube 351. In this embodiment, the radial dimension of the fixed end 332 is smaller than that of the second telescopic rod 331. Therefore, after the first piston head 333 drives the movable end 334 to contract, the second telescopic rod 331 drives the curved tube 33 to slide on the inner wall of the first fixed tube 351 to the position of the movable plate 3532, thereby preventing the curved tube 33 and the movable plate 3532 from colliding.

[0054] During normal aeration, the electric telescopic rod 43 is controlled to contract, and when the electric telescopic rod 43 contracts, it can drive the second piston head 42 to move. Fig.10 The air pressure on the left side of the middle control tube 41 decreases. At this time, the first telescopic rod 356 and the second telescopic rod 331 shrink. The shrinkage of the first telescopic rod 356 drives the movable rod 354 to move. When the movable rod 354 is pulled out from the third fixed tube 353, air can enter the air inlet pipe 355. The second telescopic rod 331 shrinks, driving the curved tube 33 to slide in the direction of pulling out the first fixed tube 351. The curved tube 33 separates from the first fixed tube 351. At this time, air can enter the first conical tube 21. At this time, the air enters the first conical tube 21 through the main tube 35 and then enters the suction section 12. After mixing with the water flow in the suction section 12, it enters the bell mouth 13 and is ejected. In this embodiment, the angle between the first conical tube 21 and the suction section 12 is small, which is conducive to avoiding an excessively large angle between the airflow and the water flow, resulting in a large channel resistance, affecting the speed of the water flow ejected from the outlet, and is conducive to improving the effect of gas-liquid mixing. The axis of the first conical tube 21 is located on the side of the axis of the suction section 12. Figure 4 As shown, the air flow direction entering the suction section 12 is not parallel to the axis of the suction section 12, but moves forward in a spiral along the inner wall of the suction section 12, similar to rifling, giving the airflow a rotation angle, which is beneficial to improving the gas-liquid mixing effect, and after entering the bell mouth 13, it is easier to diffuse under the action of the spiral forward movement, which can not only achieve the cleaning of the inner wall of the bell mouth 13, but also improve the aeration effect.

[0055] At the same time, air is drawn out from the fixed end 332 through the third connecting pipe 46, pulling the first piston head 333 to move. At this time, the first piston head 333 drives the movable end 334 to extend, and the movable end 334 drives the movable plate 3532 to extend, closing the first fixed pipe 351. At this time, water cannot pass through the first fixed pipe 351, and the first fixed pipe 351 is closed to prevent water from entering from the first tapered pipe 21 corresponding to the first fixed pipe 351 to affect the gas-liquid mixing effect. When the second telescopic rod 331 drives the curved pipe 33 to slide on the inner wall of the first fixed pipe 351 to the top of the movable plate 3532, the movable plate 3532 will extend only when the curved pipe 33 no longer blocks the movable plate 3532.

Claims

1. An ejector for sewage treatment, characterized in that: It comprises an ejector body (1), an air intake component (2) and a debris removal component (3); The ejector body (1) is provided with a conical section (11), a suction section (12) and a bell mouth (13) inside, and the conical section (11), the suction section (12) and the bell mouth (13) are connected end to end in sequence; The air intake assembly (2) comprises a first conical tube (21), the first conical tube (21) passing through the ejector body (1), one end of the first conical tube (21) facing the suction section (12), and the axis of the first conical tube (21) being located on the side of the axis of the suction section (12); The impurity removal component (3) comprises a water inlet pipe (31), a second conical pipe (32), a bent pipe (33), a filter cartridge (34) and a main pipe (35); the inner wall of the water inlet pipe (31) is slidably connected to the filter cartridge (34); the water inlet pipe (31) is fixedly connected to one end of the bent pipe (33) through the second conical pipe (32); the other end of the bent pipe (33) is slidably connected to the main pipe (35); and the main pipe (35) is connected to the other end of the first conical pipe (21).

2. The ejector for sewage treatment according to claim 1, characterized in that: More than one first conical tube (21) is provided, and one end of each first conical tube (21) facing the suction section (12) is adjacent to the bell mouth (13) in sequence.

3. The ejector for sewage treatment according to claim 2, characterized in that: The main pipe (35) is fixedly connected to the first fixed pipe (351), the first fixed pipe (351) faces a connection portion between one of the first conical pipes (21) and the main pipe (35), and the first fixed pipe (351) and a connection portion between the first conical pipe (21) and the main pipe (35) have the same radial dimensions, and the inner wall of the first fixed pipe (351) is slidably connected to the bent pipe (33).

4. The ejector for sewage treatment according to claim 3, characterized in that: The main pipe (35) is fixedly connected to the outer wall of the ejector body (1); the second fixed pipe (352) and the third fixed pipe (353) are fixedly connected to both sides of the main pipe (35); the axes of the second fixed pipe (352) and the third fixed pipe (353) are located on the same straight line; the inner wall of the second fixed pipe (352) is slidably connected to the movable rod (354); and the third fixed pipe (353) is fixedly connected to one end of the air inlet pipe (355).

5. The ejector for sewage treatment according to claim 4, characterized in that: One end of the movable rod (354) is fixedly connected to the first telescopic rod (356), and the first telescopic rod (356) is fixedly connected to the outer wall of the ejector body (1) via a first fixing seat (357).

6. The ejector for sewage treatment according to claim 5, characterized in that: The bent pipe (33) is fixedly connected to one end of a second telescopic rod (331), and the second telescopic rod (331) is fixedly connected to the outer wall of the ejector body (1) via a second mounting seat (3311).

7. The ejector for sewage treatment according to claim 6, characterized in that: The first fixed tube (351) is fixedly connected to a limiting tube (3531); a movable plate (3532) is provided on the inner side of a portion where the limiting tube (3531) and the first fixed tube (351) are connected; the movable plate (3532) is slidably connected to the inner wall of the limiting tube (3531); the movable plate (3532) is arranged in a radial direction of the first fixed tube (351) and is located between the bent tube (33) and the first conical tube (21); the movable plate (3532) is fixedly connected to a third telescopic rod (3533); and the third telescopic rod (3533) is fixedly connected to the outer wall of the main tube (35) via a third mounting seat (3534).

8. The ejector for sewage treatment according to claim 7, characterized in that: The third telescopic rod (3533) comprises a fixed end (332), a first piston head (333) and a movable end (334); one end of the movable end (334) is fixedly connected to the movable plate (3532); the other end of the movable end (334) is fixedly connected to the first piston head (333); the first piston head (333) is slidably connected to the inner wall of the fixed end (332); and the outer wall of the fixed end (332) is fixedly connected to the outer wall of the main pipe (35) via the third mounting seat (3534).

9. The ejector for sewage treatment according to claim 8, characterized in that: The device also comprises a control assembly (4), the control assembly (4) comprising a control tube (41), a second piston head (42), an electric telescopic rod (43), a first connecting tube (44), a second connecting tube (45) and a third connecting tube (46), the outer wall of the control tube (41) being fixedly connected to the outer wall of the ejector body (1), the inner end wall of the control tube (41) being fixedly connected to one end of the electric telescopic rod (43), the other end of the electric telescopic rod (43) being fixedly connected to the second piston head (42), and the second piston head (42) being slidably connected to the control tube (41). The inner wall of the control tube (41) and the cavity on one side of the control tube (41) deviating from the electric telescopic rod (43) are respectively fixedly connected to the first connecting tube (44), the second connecting tube (45) and one end of the third connecting tube (46); the other end of the first connecting tube (44) is fixedly connected to the air inlet end of the first telescopic rod (356); the other end of the second connecting tube (45) is fixedly connected to the air inlet end of the second telescopic rod (331); and the other end of the third connecting tube (46) is fixedly connected to the air inlet end of the fixed end (332) deviating from the movable end (334).

10. The ejector for sewage treatment according to claim 1, characterized in that: The water inlet pipe (31) is provided with an annular groove (311), the inner wall of the annular groove (311) is fixedly connected to a magnet ring (312), the filter cartridge (34) comprises a mounting ring (341) and a conical mesh cartridge (342), the conical mesh cartridge (342) is fixedly connected to the mounting ring (341), and the mounting ring (341) is slidably connected to the inner wall of the annular groove (311).

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