A jet injector for sewage treatment

Abstract

The present invention relates to the technical field of sewage treatment, and specifically includes a jet injector for sewage treatment, which comprises a jet injector body, an air inlet assembly and an impurity removal assembly; a conical section, a suction section and a bell mouth are formed inside the jet injector body, and the conical section, the suction section and the bell mouth are connected end to end in sequence; the air inlet assembly includes a first conical tube, the first conical tube passes through the jet injector body, one end of the first conical tube faces the suction section, and the axis line of the first conical tube is located on the side of the axis line of the suction section; the impurity removal assembly includes a water inlet pipe, a second conical tube, 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. In the present invention, the included angle between the first conical tube and the suction section is small, which is beneficial to avoiding too large an included angle between the air flow and the water flow, resulting in a large channel resistance and affecting the speed of the water flow ejected from the water outlet, and is also beneficial to improving the air-liquid mixing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a jet ejector for sewage treatment. Background Art

[0002] Sewage treatment refers to the process of purifying sewage to meet the water quality requirements for discharging into a certain water body or for reuse. Sewage treatment is widely applied in various fields such as medical treatment and catering, and is also increasingly entering the daily lives of ordinary people. During the sewage treatment process, an aeration jet ejector is used. The aeration jet ejector is generally connected to a water pump and connected to an air pipeline to achieve water flow jetting to generate fine bubbles. The air in the bubbles is in full contact with the water, and oxygen is dissolved in the water, thereby achieving the aeration effect. It is widely used in aspects such as solution mixing manufacturing and sewage treatment. In the sewage treatment process, the jet ejector has the advantages of high mass transfer efficiency, low energy consumption, and not being easily blocked, and is widely used in deep well aeration and occasions with high activated sludge concentration. The aeration jet ejector mainly cuts air into tiny bubbles in sewage treatment, fully mixes with the sewage, increases the dissolved oxygen content, provides oxygen for the growth and metabolism of microorganisms, and combines the tiny bubbles generated by the jet ejector with the suspended particles in the sewage to make the particles float to the water surface for convenient solid-liquid separation.

[0003] Currently, a Chinese utility model with the application number CN201921887982.5 discloses a flat-mouth-shaped jet ejector for sewage treatment. Although the double flat-mouth inclined air inlet pipe design ensures that the jet ejector has a large power efficiency and does not easily scale inside, it is difficult to inject the air flow into the suction chamber at a high speed, resulting in poor gas-liquid mixing effect. In addition, the angle between the air flow and the water flow is too large, causing large channel resistance and affecting the speed of the water flow spraying out from the water outlet. Moreover, after the sediment in the sewage is stirred up, it is repeatedly sprayed in the sewage, affecting the sewage treatment effect and easily blocking the jet ejector. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the jet ejector in the related technology is difficult to inject the air flow into the suction chamber at a high speed, resulting in poor gas-liquid mixing effect. In addition, the angle between the air flow and the water flow is too large, causing large channel resistance and affecting the speed of the water flow spraying out from the water outlet. Moreover, after the sediment in the sewage is stirred up, it is repeatedly sprayed in the sewage, affecting the sewage treatment effect and easily blocking the jet ejector.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A jet ejector for sewage treatment, comprising a jet ejector body, an air inlet assembly, and an impurity removal assembly;

[0006] A conical section, a suction section, and a bell mouth are formed inside the jet ejector body, and the conical section, the suction section, and the bell mouth are connected end to end in sequence;

[0007] The intake assembly includes a first conical tube that passes through the injector body. One end of the first conical tube faces the suction section, and the axis line of the first conical tube is located on the side of the axis line of the suction section.

[0008] The impurity removal assembly includes a water inlet pipe, a second conical tube, a bent pipe, a filter cartridge, and a main pipe. The inner wall of the water inlet pipe is slidably connected to the filter cartridge. The water inlet pipe is fixedly connected to one end of the bent pipe through the second conical tube. The other end of the bent pipe is slidably connected to the main pipe, and the main pipe communicates with the other end of the first conical tube.

[0009] As a preferred embodiment of the injector for sewage treatment according to the present invention, there is more than one first conical tube, and the ends of the respective first conical tubes facing the suction section are successively closer to the bell mouth.

[0010] As a preferred embodiment of the injector for sewage treatment according to the present invention, the main pipe is fixedly connected to a first fixed pipe that faces the connection part of one of the first conical tubes and the main pipe, and the radial dimensions of the first fixed pipe and the connection part of the first conical tube and the main pipe are the same. The inner wall of the first fixed pipe is slidably connected to the bent pipe.

[0011] As a preferred embodiment of the injector for sewage treatment according to the present invention, the main pipe is fixedly connected to the outer wall of the injector body. The second fixed pipe and the third fixed pipe are fixedly connected to both sides of the main pipe, and the axes of the second fixed pipe and the third fixed pipe are on the same straight line. The inner wall of the second fixed pipe is slidably connected to a movable rod, and one end of the third fixed pipe is fixedly connected to the intake pipe.

[0012] As a preferred embodiment of the injector for sewage treatment according to the present invention, one end of the movable rod is fixedly connected to a first telescopic rod, and the first telescopic rod is fixedly connected to the outer wall of the injector body through a first fixed seat.

[0013] As a preferred embodiment of the injector for sewage treatment according to the present invention, one end of the bent pipe is fixedly connected to a second telescopic rod, and the second telescopic rod is fixedly connected to the outer wall of the injector body through a second mounting seat.

[0014] As a preferred embodiment of the injector for sewage treatment according to the present invention, a limiting pipe is fixedly connected to the first fixed pipe. An inner side of the part where the limiting pipe is connected to the first fixed pipe is provided with a movable plate that is slidably connected to the inner wall of the limiting pipe. The movable plate is arranged in the radial direction of the first fixed pipe and is located between the bent pipe and the first conical tube. The movable plate is fixedly connected to a third telescopic rod, and the third telescopic rod is fixedly connected to the outer wall of the main pipe through a third mounting seat.

[0015] As a preferred embodiment of the ejector for sewage treatment according to 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, and 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 a third mounting seat.

[0016] As a preferred embodiment of the ejector for sewage treatment according to the present invention, it further includes a control assembly. The control assembly includes a control pipe, a second piston head, an electric telescopic rod, a first connecting pipe, a second connecting pipe, and a third connecting pipe. The outer wall of the control pipe is fixedly connected to the outer wall of the ejector body. The inner end wall of the control pipe is fixedly connected to one end of the electric telescopic rod, and 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 pipe. The chambers on one side of the control pipe deviating from the electric telescopic rod are respectively fixedly communicated with one ends of the first connecting pipe, the second connecting pipe, and the third connecting pipe. The other end of the first connecting pipe is fixedly connected to the air inlet end of the first telescopic rod, the other end of the second connecting pipe is fixedly connected to the air inlet end of the second telescopic rod, and the other end of the third connecting pipe is fixedly connected to the air inlet end on the side of the fixed end close to the movable end.

[0017] As a preferred embodiment of the ejector for sewage treatment according to the present invention, an annular groove is formed on the water inlet pipe, and a magnet ring is fixedly connected to the inner wall of the annular groove. The filter cartridge includes a mounting ring and a conical mesh cylinder. 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.

[0018] The beneficial effects of the present invention: In the present invention, the included angle between the first conical pipe and the suction section is small, which is beneficial to avoiding too large an included angle between the air flow and the water flow, resulting in large channel resistance and affecting the water flow speed ejected from the water outlet, and is also beneficial to improving the gas-liquid mixing effect.

[0019] When the ejector body sprays water, according to the Venturi effect, it can attract water flow to enter the second conical pipe from the water inlet pipe, enter the first conical pipe through the elbow and then enter the suction section. At this time, the water flow sucked by the water inlet pipe, after passing through the filter cartridge, filters out the stirred-up sediment, preventing the repeated spraying in the sewage from affecting the sewage treatment effect and avoiding blocking the ejector. Compared with the prior art method of adding a filter screen at the water pump inlet for filtration, in the present invention, the stirred-up sediment is filtered out by using the Venturi effect at the position of the water inlet pipe, which is beneficial to preventing the water pump from being blocked and will not cause the water pump pumping efficiency to decrease due to excessive accumulation of impurities at the filter screen at the water pump inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present disclosure.

[0021] Figure 2 It is a cross-sectional view of the ejector body in the embodiment of the present disclosure.

[0022] Figure 3 In the embodiments of the present disclosure Figure 2 The enlarged schematic view of part B

[0023] Figure 4 The schematic view of the positions of the respective first conical tubes in the embodiments of the present disclosure

[0024] Figure 5 The cross-sectional view of the water inlet pipe in the embodiments of the present disclosure

[0025] Figure 6 The schematic view of the filter cartridge structure in the embodiments of the present disclosure

[0026] Figure 7 In the embodiments of the present disclosure Figure 1 The enlarged schematic view of part A

[0027] Figure 8 The cross-sectional view of the third telescopic rod in the embodiments of the present disclosure

[0028] Figure 9 The cross-sectional view of the first fixed pipe in the embodiments of the present disclosure

[0029] Figure 10 The cross-sectional view of the control assembly in the embodiments of the present disclosure

[0030] Reference numerals: 1 - injector body, 11 - conical section, 12 - suction section, 13 - flared 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 pipe, 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 mesh 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 - intake 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 implementation manners

[0031] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings of the specification.

[0032] Example 1, referring to Figures 1 - 5, this embodiment provides a jet injector for sewage treatment, including a jet injector body 1, an air intake assembly 2, and an impurity removal assembly 3;

[0033] A conical section 11, a suction section 12, and a flared opening 13 are provided inside the jet injector body 1, and the conical section 11, the suction section 12, and the flared opening 13 are connected end to end in sequence;

[0034] Preferably in this embodiment, the left end of the jet injector body 1 is Figure 1 connected to an existing water pump, and the water pump accesses water flow into the jet injector body 1. After the water flow passes through the conical section 11, the flow rate increases, and the flared opening 13 facilitates guiding the ejected water flow.

[0035] The air intake assembly 2 includes a first conical tube 21. The first conical tube 21 passes through the jet injector body 1, and one end of the first conical tube 21 faces the suction section 12, and the axis line of the first conical tube 21 is located on the side of the axis line of the suction section 12;

[0036] Preferably in this embodiment, after air enters the first conical tube 21, it enters the suction section 12, mixes with the water flow in the suction section 12, and then enters the flared opening 13 and is ejected. In this embodiment, the included angle between the first conical tube 21 and the suction section 12 is small, which is beneficial to avoiding too large an included angle between the air flow and the water flow, resulting in large channel resistance and affecting the speed of the water flow ejected from the water outlet, and is also beneficial to improving the air-liquid mixing effect. The axis line of the first conical tube 21 is located on the side of the axis line of the suction section 12. As Figure 4 shown, the air flow direction entering the suction section 12 is not parallel to the axis line of the suction section 12, but spirally moves forward along the inner wall of the suction section 12, similar to rifling, giving the air flow a rotation angle, which is beneficial to improving the air-liquid mixing effect, and after entering the flared opening 13, it is easier to diffuse under the action of the spiral forward movement, which can not only clean the inner wall of the flared opening 13, but also improve the aeration effect.

[0037] The impurity removal assembly 3 includes a water inlet pipe 31, a second conical tube 32, an elbow 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 elbow 33 through the second conical tube 32, and the other end of the elbow 33 is slidably connected to the main pipe 35. The main pipe 35 communicates with the other end of the first conical tube 21.

[0038] Preferably, in this embodiment, when the injector body 1 sprays water, according to the Venturi effect, it can attract water flow to enter the second conical tube 32 from the water inlet pipe 31. After passing through the elbow 33, it enters the first conical tube 21 and then enters the suction section 12. At this time, the water flow sucked by the water inlet pipe 31, after passing through the filter cartridge 34, filters out the stirred-up sediment, preventing the repeated spraying in the sewage from affecting the sewage treatment effect and avoiding blocking the injector. Compared with the prior art method of filtering by adding a filter screen at the water inlet of the water pump, in the present invention, the stirred-up sediment is filtered out by using the Venturi effect at the position of the water inlet pipe 31, which is beneficial 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 accumulation of impurities at the filter screen at the water inlet of the water pump.

[0039] Example 2, referring to Figures 1 - 10 , this embodiment is based on the previous embodiment, and the difference from the previous embodiment is:

[0040] Referring to Figure 4 , more than one first conical tube 21 is provided, and one end of each first conical tube 21 facing the suction section 12 is successively close to the bell mouth 13.

[0041] Preferably, in this embodiment, by providing a plurality of first conical tubes 21, and one end of each first conical tube 21 facing the suction section 12 is successively close to the bell mouth 13, the air entering the suction section 12 enters in multiple times, which is beneficial to generating finer bubbles, thereby improving the gas-liquid mixing effect. In this embodiment, 4 first conical tubes 21 are provided, which are evenly arranged around the suction section 12, and each of them is successively close to the bell mouth 13, so that the air flow entering one end of the first conical tube 21 close to the bell mouth 13 can be pushed by the air flow entering one end of the first conical tube 21 far from the bell mouth 13, which is beneficial to further increasing the speed of the gas-liquid mixed fluid and ensuring that the injector has a large power efficiency.

[0042] Referring to Figure 3 , the main pipe 35 is fixedly connected to the first fixed pipe 351. The first fixed pipe 351 faces the connection part of one of the first conical tubes 21 and the main pipe 35, and the radial dimensions of the first fixed pipe 351 and the connection part of the first conical tube 21 and the main pipe 35 are the same. The inner wall of the first fixed pipe 351 is slidably connected to the elbow 33.

[0043] Preferably, in this embodiment, the elbow pipe 33 can slide in the first fixed pipe 351. When the elbow pipe 33 moves towards the direction close to the first conical pipe 21 and is inserted into the first conical pipe 21, air cannot enter the first conical pipe 21 at this time. Under the action of the Venturi effect, the suction section 12 can attract water flow to enter the second conical pipe 32 from the water inlet pipe 31, pass through the elbow pipe 33, enter the first conical pipe 21, and then enter the suction section 12. At this time, the water flow sucked by the water inlet pipe 31, after passing through the filter cartridge 34, filters out the stirred-up sediment, preventing the repeated spraying in the sewage from affecting the sewage treatment effect and avoiding blocking the ejector. Compared with the prior art method of filtering by adding a filter screen at the water pump inlet, in the present invention, the stirred-up sediment is filtered out by using the Venturi effect at the position of the water inlet pipe 31, which is beneficial to preventing the water pump from being blocked, and there will be no problem that the impurities accumulated at the filter screen of the water pump inlet are too many, resulting in a decrease in the water pumping efficiency of the water pump.

[0044] Referring to Figure 1 , 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, and the axes of the second fixed pipe 352 and the third fixed pipe 353 are on the same straight line. The inner wall of the second fixed pipe 352 is slidably connected to the movable rod 354, and one end of the third fixed pipe 353 is fixedly connected to one end of the air inlet pipe 355.

[0045] 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, it can prevent the air in the air inlet pipe 355 from entering the main pipe 35. At this time, when the end of the elbow pipe 33 is inserted into the first conical pipe 21, it can seal the first conical pipe 21, and air cannot enter the first conical pipe 21. At this time, the Venturi effect acts on the first conical pipe 21 into which the end of the elbow pipe 33 is inserted, and the suction section 12 can attract water flow to enter the second conical pipe 32 from the water inlet pipe 31, pass through the elbow pipe 33, enter the first conical pipe 21, and then enter the suction section 12. At this time, the water flow sucked by the water inlet pipe 31, after passing through the filter cartridge 34, filters out the stirred-up sediment, preventing the repeated spraying in the sewage from affecting the sewage treatment effect and avoiding blocking the ejector.

[0046] Referring to Figure 1 and Figure 7 , one end of the movable rod 354 away from the second fixed pipe 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.

[0047] Preferably, in this embodiment, when the first telescopic rod 356 works, it can drive the movable rod 354 to move, and the movable rod 354 can slide along the inner wall of the second fixed pipe 352. The first fixed seat 357 can play a role in fixing the first telescopic rod 356.

[0048] Referring to 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 injector body 1 through the second mounting seat 3311.

[0049] Preferably in this embodiment, when the telescopic end of the second telescopic rod 331 extends, it can drive the bent pipe 33 to move, so that the bent pipe 33 slides on the inner wall of the first fixed pipe 351.

[0050] Referring to Figure 9 A limiting pipe 3531 is fixedly connected to the first fixed pipe 351. An inner side of a part where the limiting pipe 3531 is connected to the first fixed pipe 351 is provided with a movable plate 3532. The movable plate 3532 is slidably connected to the inner wall of the limiting pipe 3531. The movable plate 3532 is arranged in the radial direction of the first fixed pipe 351 and is located between the bent pipe 33 and the first conical pipe 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 pipe 35 through the third mounting seat 3534.

[0051] Preferably in this embodiment, when the third telescopic rod 3533 expands and contracts, it can drive the movable plate 3532 to slide on the inner wall of the limiting pipe 3531. When the third telescopic rod 3533 extends, it drives the movable plate 3532 to close the first fixed pipe 351. At this time, air cannot enter the first fixed pipe 351. When the third telescopic rod 3533 contracts, it drives the movable plate 3532 to move, opening the first fixed pipe 351. At this time, air can enter the first fixed pipe 351.

[0052] Referring to 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. 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.

[0053] Preferably in this embodiment, when the first piston head 333 moves, it can drive the movable end 334 to move. 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 pipe 351. At this time, air cannot enter the first fixed pipe 351. When the movable end 334 contracts, it drives the movable plate 3532 to move, opening the first fixed pipe 351. At this time, air can enter the first fixed pipe 351.

[0054] Referring to Figure 10, further comprising a control component 4, the control component 4 includes a control pipe 41, a second piston head 42, an electric telescopic rod 43, a first connecting pipe 44, a second connecting pipe 45 and a third connecting pipe 46. The outer wall of the control pipe 41 is fixedly connected to the outer wall of the injector body 1. The inner end wall of the control pipe 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. The second piston head 42 is slidably connected to the inner wall of the control pipe 41. The cavities on the side of the control pipe 41 deviating from the electric telescopic rod 43 are respectively fixedly communicated with one ends of the first connecting pipe 44, the second connecting pipe 45 and the third connecting pipe 46. The other end of the first connecting pipe 44 is fixedly connected to the air inlet end of the first telescopic rod 356. The other end of the second connecting pipe 45 is fixedly connected to the air inlet end of the second telescopic rod 331. The other end of the third connecting pipe 46 is fixedly connected to the air inlet end on the side of the fixed end 332 closer to the movable end 334; thus forming a mechanism in which the first telescopic rod 356, the second telescopic rod 331 and the third telescopic rod 3533 are respectively driven to expand and contract by gas.

[0055] Preferably in this embodiment, when the electric telescopic rod 43 works, it can drive the second piston head 42 to move, and the second piston head 42 squeezes the air on the left side of Figure 10 the control pipe 41. The air enters the first connecting pipe 44, the second connecting pipe 45 and the third connecting pipe 46. At this time, the first telescopic rod 356 and the second telescopic rod 331 extend. After the air enters the inner cavity on the side of the fixed end 332 closer to the movable end 334 from the third connecting pipe 46, it pushes the first piston head 333 to move Figure 8 to the left side in

[0056] Refer to Figure 5 and Figure 6 , an annular groove 311 is formed on the water inlet pipe 31. The inner wall of the annular groove 311 is fixedly connected with 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. The mounting ring 341 is slidably connected to the inner wall of the annular groove 311.

[0057] Preferably, in this embodiment, the mounting ring 341 can slide into the annular groove 311. The mounting ring 341 is made of iron, and the magnet ring 312 adsorbs the mounting ring 341 to prevent the mounting ring 341 and the conical mesh cylinder 342 from accidentally falling off. The conical mesh cylinder 342 can filter out the stirred-up sediment. The sediment will first accumulate at the tip of the conical mesh cylinder 342, and the edge of the conical mesh cylinder 342 can still pass water flow. Compared with the existing flat filter screen, it is not easy to be blocked.

[0058] When it is necessary to clean the filtered stirred-up sediment, when the electric telescopic rod 43 extends, it can drive the second piston head 42 to move. The second piston head 42 squeezes the air on the left side of the control pipe 41. The air enters the first connecting pipe 44, the second connecting pipe 45 and the third connecting pipe 46. At this time, the first telescopic rod 356 and the second telescopic rod 331 extend. 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 pipe 353, it can prevent the air in the air inlet pipe 355 from entering, so that the entry of air can be completely blocked. Figure 10 The second telescopic rod 331 extends, driving the elbow 33 to move towards the direction close to the first conical tube 21. After the elbow 33 is inserted into the first conical tube 21, at this time, air cannot enter the first conical tube 21. Under the action of the Venturi effect, the suction section 12 can attract the water flow to enter the second conical tube 32 from the water inlet pipe 31, enter the first conical tube 21 through the elbow 33 and then enter the suction section 12. At this time, the water flow inhaled by the water inlet pipe 31, after passing through the filter cylinder 34, filters out the stirred-up sediment, prevents the repeated spraying in the sewage from affecting the sewage treatment effect, and avoids blocking the ejector. Compared with the prior art method of filtering by adding a filter screen at the water inlet of the water pump, in the present invention, the stirred-up sediment is filtered by using the Venturi effect at the position of the water inlet pipe 31, which is beneficial to preventing the water pump from being blocked, and there will be no problem that the impurities accumulated at the filter screen at the water inlet of the water pump are too much, resulting in the reduction of the water pumping efficiency of the water pump.

[0059] At the same time, after the air enters the inner cavity of the fixed end 332 biased towards the movable end 334 from the third connecting pipe 46, it pushes the first piston head 333 to move to the left in the [content missing in the original]. At this time, 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 pipe 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 elbow 33 to slide on the inner wall of the first fixed pipe 351 to the position of the movable plate 3532, preventing the elbow 33 from colliding with the movable plate 3532.

[0060] At the same time, after the air enters the inner cavity of the fixed end 332 biased towards the movable end 334 from the third connecting pipe 46, it pushes the first piston head 333 to move Figure 8 to the left in the [content missing in the original]. At this time, 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 pipe 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 elbow 33 to slide on the inner wall of the first fixed pipe 351 to the position of the movable plate 3532, preventing the elbow 33 from colliding with the movable plate 3532.

[0061] During normal aeration, the electric telescopic rod 43 is controlled to contract. When the electric telescopic rod 43 contracts, it can drive the second piston head 42 to move. Figure 10 The air pressure on the left side of the control pipe 41 decreases. At this time, the first telescopic rod 356 and the second telescopic rod 331 contract. The contraction of the first telescopic rod 356 drives the movable rod 354 to move. When the movable rod 354 is pulled out of the third fixed pipe 353, air can enter the intake pipe 355. The second telescopic rod 331 contracts and drives the elbow pipe 33 to slide in the direction of pulling out of the first fixed pipe 351. The elbow pipe 33 is separated from the first fixed pipe 351. At this time, air can enter the first conical pipe 21. At this time, the air enters the first conical pipe 21 through the main pipe 35 and then enters the suction section 12. After being mixed with the water flow in the suction section 12, it enters the bell mouth 13 and is ejected. In this embodiment, the included angle between the first conical pipe 21 and the suction section 12 is small, which is beneficial to avoiding too large an included angle between the air flow and the water flow, resulting in a large channel resistance and affecting the speed of the water flow ejected from the water outlet, and is also beneficial to improving the air-liquid mixing effect. The axis line of the first conical pipe 21 is located on the side of the axis line of the suction section 12. As Figure 4 shown, the air flow direction entering the suction section 12 is not parallel to the axis line of the suction section 12, but spirally moves forward along the inner wall of the suction section 12, similar to rifling, giving the air flow a rotation angle, which is beneficial to improving the air-liquid mixing effect, and is more likely to diffuse after entering the bell mouth 13 under the action of the spiral forward movement. It can not only clean the inner wall of the bell mouth 13, but also improve the aeration effect.

[0062] At the same time, the air is drawn away 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 out, closing the first fixed pipe 351. At this time, the water flow cannot pass through the first fixed pipe 351, sealing the first fixed pipe 351 to prevent the water flow from entering the first conical pipe 21 corresponding to the first fixed pipe 351 and affecting the air-liquid mixing effect. When the second telescopic rod 331 drives the elbow pipe 33 to slide above the movable plate 3532 on the inner wall of the first fixed pipe 351 and the elbow pipe 33 no longer blocks the movable plate 3532, the movable plate 3532 will extend out.

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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