A sewage treatment agent solution spraying device for sewage treatment

Abstract

The present application relates to the technical field of spraying device, and specifically discloses a sewage treatment agent solution spraying device for sewage treatment, which comprises a backflushing switching device, the backflushing switching device comprises a base, a cover plate, a fixing rod, a spray head and a flow guide plate, a spraying opening is formed in one side of the base, a first liquid discharge opening is formed in the base, the cover plate is arranged at the gap of the base, the cover plate and the base jointly form a rotatable column structure, the fixing rod is arranged at the axis position of the column structure formed by the base and the cover plate, the base and the cover plate can rotate relative to the fixing rod, and the spray head is arranged on the fixing rod; the base and the cover plate in the backflushing switching device can rotate relative to the fixing rod, so that the spray head can be switched between the spraying position and the backflushing position; when in the spraying position, the spray head sprays the agent solution outward through the spraying opening; when in the backflushing position, the pressure solution can enter from the side of the output end of the spray head to reversely flush the spray head, so that the cleaning effect of the spray head is improved.

Description

Technical Field

[0001] This invention relates to the field of spraying device technology, specifically to a wastewater treatment agent solution spraying device for wastewater treatment. Background Technology

[0002] In wastewater treatment, it is typically necessary to add solutions of coagulants, flocculants, disinfectants, phosphorus removers, deodorizers, or pH adjusters to the wastewater, depending on its properties and treatment process requirements. These solutions aim to achieve effects such as flocculation and sedimentation, sterilization and disinfection, deodorization, and pH adjustment. Therefore, the order of addition, uniformity of spraying, and sufficient contact between the solutions and the wastewater directly affect the wastewater treatment effect and the utilization rate of the chemicals.

[0003] Current methods of pesticide application mostly involve direct application, pipeline application, or nozzle spraying. Direct application or single-point pipeline application can easily cause local concentration of pesticides, resulting in uneven mixing. Although ordinary nozzle spraying can expand the pesticide dispersion range, it usually only has a single spraying function, making it difficult to achieve sequential switching of multiple pesticides, and also difficult to balance spray uniformity and nozzle cleaning requirements.

[0004] In addition, wastewater often contains sludge, suspended particles, flocculent matter, and chemical deposits, which can easily clog sprinkler heads after prolonged use. Existing flushing structures are mostly simple unidirectional or overall flushing. When some sprinkler heads are clogged, the flushing fluid can easily flow out through the unblocked channels with less resistance, making it difficult to effectively backflush the clogged sprinkler heads, resulting in inconsistent unclogging performance.

[0005] Meanwhile, if impurities detached from the backflushing solution are not filtered and discharged in a timely manner, they may enter other nozzles or subsequent channels with the liquid, causing secondary blockages and affecting the stability of continuous spraying of the pesticide. Especially when multiple pesticides are added sequentially, nozzle blockage, backflushing liquid reflux, and impurity crossflow will further affect the spray volume and treatment effect.

[0006] Therefore, existing wastewater treatment chemical solution spraying devices still have problems such as inconvenience in sequential chemical addition, insufficient spray uniformity, inconvenience in switching between spraying and backflushing states, unstable nozzle clearing effect, and backflushing impurities easily causing secondary blockage. Summary of the Invention

[0007] The purpose of this invention is to provide a wastewater treatment agent solution spraying device for wastewater treatment, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a wastewater treatment agent solution spraying device, comprising: a backflushing switching device, the backflushing switching device comprising: a base, a cover plate, a fixing rod, a nozzle, and a guide plate; a spray port is provided on one side of the base, a first drain port is provided on the base, the cover plate is disposed at the notch of the base, the cover plate and the base together form a rotatable cylindrical structure, a connection port is provided at the top of the cover plate, a second drain port is provided at the bottom of the cover plate, the fixing rod is disposed at the axial position of the cylindrical structure formed by the base and the cover plate, the base and the cover plate can rotate relative to the fixing rod, the nozzle is disposed on the fixing rod, the nozzle has an input end and an output end, and the guide plate is disposed between the cover plate and the fixing rod. The guide plate is connected to the connection port to guide the pressurized solution entering through the connection port to the nozzle. The bottom end of the guide plate has a through hole corresponding to the second drain port. The base and the cover plate can rotate relative to the fixed rod between the spray position and the backflush position. In the spray position, the spray port corresponds to the output end of the nozzle. The connection port is connected to the input end of the nozzle through the guide plate, so that the pressurized solution enters from the input end of the nozzle and is sprayed out from the output end of the nozzle through the spray port. In the backflush position, the cover plate is located outside the output end of the nozzle, so that the output end of the nozzle is within the space enclosed by the base and the cover plate. The connection port is connected to the output end side of the nozzle, so that the pressurized solution enters from the output end side of the nozzle and is discharged through the first drain port.

[0009] Preferably, the guide plate is disposed between the cover plate and the fixed rod along the length direction of the fixed rod, forming a space for receiving the pressurized solution between the guide plate and the cover plate, and forming a space corresponding to multiple nozzles between the guide plate and the fixed rod. The guide plate is used to disperse the pressurized solution entering from the second drain port and the through hole along the length direction of the fixed rod when the backflushing switching device is in the spraying position, and guide the pressurized solution into multiple nozzles respectively, so as to improve the uniformity of liquid supply to multiple nozzles.

[0010] Preferably, the base and cover plate can rotate relative to the fixed rod between two working positions with a rotation angle of 180° between the two working positions, one working position corresponding to the spraying position and the other working position corresponding to the backflush position.

[0011] Preferably, the wastewater treatment agent solution spraying device further includes: a first housing, a transmission housing, a second housing, a third housing, a base, an opening, an injection port, a first adjusting plate, a first water channel, a second adjusting plate, a second water channel, a third adjusting plate, a third water channel, a fourth adjusting plate, a fourth water channel, and a first motor. The transmission housing is located below the center of the first housing. The second housing is located on one side of the transmission housing, and its top end is connected to the first housing. The third housing is located on the other side of the transmission housing, and its top end is connected to the first housing. The base is connected to the bottom ends of the second housing, the transmission housing, and the third housing. The bottom end of the fixing rod is fixed to the base. The openings are respectively opened on the side of the second housing and the third housing facing away from the transmission housing. The injection port is located on the first housing, and there are multiple injection ports. The first adjusting plate is rotatably disposed inside the first housing. The first water channel is disposed inside the first adjusting plate, and the head end of the first water channel can communicate with any injection port. The second regulating disc is fixedly installed inside the first housing. The second water channel is installed inside the second regulating disc, with its head end connected to the tail end of the first water channel. The second water channel is a one-inlet, two-outlet water channel. The third regulating disc is rotatably installed on the bottom surface of the second regulating disc. The third water channel is installed inside the third regulating disc, with its head end connected to one tail end of the second water channel. The fourth regulating disc is rotatably installed on the bottom surface of the second regulating disc. The fourth water channel is installed inside the fourth regulating disc, with its head end connected to the other tail end of the second water channel. The first motor is connected to the first regulating disc and is used to drive the first regulating disc to rotate. There are two backflush switching devices, which have the same structure and are installed in the second and third housings respectively in the same direction. The tail end of the third water channel is connected to the connection port of one backflush switching device, and the tail end of the fourth water channel is connected to the connection port of the other backflush switching device. The spray nozzles of the two backflush switching devices can correspond to the corresponding openings.

[0012] Preferably, the number of injection ports is N, and the single rotation angle of the first adjusting plate is 360° / N.

[0013] Preferably, the wastewater treatment agent solution spraying device for wastewater treatment further includes: an auxiliary water channel, which is disposed on the base and located between two backflushing switching devices. The auxiliary water channel has a first end and a second end. The first end of the auxiliary water channel is located on the rotation path of the first and second drain ports of one backflushing switching device, and the second end of the auxiliary water channel is located on the rotation path of the first and second drain ports of the other backflushing switching device.

[0014] Preferably, the wastewater treatment agent solution spraying device for wastewater treatment further includes: a cleaning device, a filter plate, spiral blades, a third motor, and a drain channel. The cleaning device is installed on the auxiliary water channel, the filter plate is installed in the middle of the auxiliary water channel for filtering the solution flowing through the auxiliary water channel, the spiral blades are installed on the axis of the filter plate for scraping and conveying the impurities trapped by the filter plate, the third motor is installed in the base and connected to the spiral blades for driving the spiral blades to rotate, and the drain channel is opened at the bottom of the base and located below the spiral blades for receiving the impurities conveyed by the spiral blades.

[0015] Preferably, the wastewater treatment agent solution spraying device further includes: a second motor, a first transmission disc, and a transmission rod. The second motor is disposed between the third and fourth adjustment discs. The second motor has a first output end and a second output end. The first transmission disc is connected to the first output end of the second motor. The outer wall of the first transmission disc meshes with the outer walls of the third and fourth adjustment discs respectively. The transmission rod is connected to the second output end of the second motor and is connected to the filter plate. The second motor drives the third and fourth adjustment discs to rotate synchronously through the first transmission disc and drives the filter plate to rotate through the transmission rod.

[0016] Preferably, the filter plate has an arc-shaped structure and can rotate between a first filtration position and a second filtration position. When the pressurized solution flows from one backflushing switching device to another backflushing switching device, the inner side of the arc of the filter plate faces the incoming side of the pressurized solution. When the pressurized solution flows in the reverse direction, the filter plate rotates to another filtration position so that the inner side of the arc of the filter plate still faces the incoming side of the pressurized solution.

[0017] The wastewater treatment agent solution spraying device proposed in this invention has the following advantages: 1. This invention, by setting multiple injection ports, a first regulating plate, a first water channel, a second water channel, a third water channel, and a fourth water channel, enables different reagent solutions to enter the device sequentially in a set order, avoiding premature mixing of multiple reagents and improving the orderliness of reagent addition and treatment effect.

[0018] 2. In the backflush switching device of the present invention, the base and cover plate can rotate relative to the fixed rod, so that the nozzle can switch between the spraying position and the backflush position. In the spraying position, the nozzle sprays the chemical solution outward through the spray nozzle. In the backflush position, the pressurized solution can enter from the output end of the nozzle to backflush the nozzle, thereby improving the cleaning effect of the nozzle.

[0019] 3. The two backflush switching devices of the present invention are respectively installed in the second housing and the third housing, and are synchronously rotated by the third adjustment plate and the fourth adjustment plate, so that when one backflush switching device is in the spraying state, the other backflush switching device is in the backflush state; when switching to the next agent, the two states are interchanged, thereby realizing continuous spraying and synchronous blockage clearing.

[0020] 4. The liquid and impurities after backflushing can enter the auxiliary water channel through the first drain port and be filtered by the filter plate in the auxiliary water channel, reducing the probability of backflushing debris entering the other nozzle or subsequent flow channel, thereby reducing the risk of secondary blockage.

[0021] 5. The filter plate in the cleaning device of the present invention is used to intercept impurities in the backflushing fluid. The spiral blades can scrape off the impurities on the filter plate under the drive of the third motor and transport the impurities to the sewage channel for centralized cleaning, thereby improving the stability of continuous operation of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the overall casing of the present invention; Figure 4 This is an internal view of the base of the present invention; Figure 5 This is a perspective view of the cleaning device of the present invention; Figure 6 This is a plan view of the cleaning device of the present invention; Figure 7 This is a schematic diagram of the backflush switching device of the present invention; Figure 8 This is a diagram illustrating the air deflector of the present invention.

[0023] In the diagram: 1. First housing; 2. Transmission housing; 3. Second housing; 4. Third housing; 5. Base; 6. Opening; 7. Injection port; 81. First adjusting plate; 82. First water channel; 91. Second adjusting plate; 92. Second water channel; 101. Third adjusting plate; 102. Third water channel; 111. Fourth adjusting plate; 112. Fourth water channel; 12. First motor; 13. Second motor; 14. First transmission plate; 15. Transmission 16. Rod; 17. Auxiliary waterway; 18. Cleaning device; 19. Filter plate; 10. Spiral blade; 11. Third motor; 12. Sewage channel; 13. Sealing plate; 14. Backflush switching device; 15. Base; 16. Spray nozzle; 17. First drain outlet; 18. Cover plate; 19. Connection port; 10. Second drain outlet; 11. Fixing rod; 12. Nozzle; 13. Guide plate; 14. Through hole. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-8 This invention provides a technical solution for a wastewater treatment agent solution spraying device. The detailed connection method is a well-known technology in the field. The working principle and process are mainly described below. The specific operation is as follows.

[0026] This embodiment provides a wastewater treatment agent solution spraying device, including a first housing 1, a transmission housing 2, a second housing 3, a third housing 4, a base 5, an injection port 7, a first adjusting plate 81, a second adjusting plate 91, a third adjusting plate 101, a fourth adjusting plate 111, two backflush switching devices 18, an auxiliary water channel 16, and a cleaning device 17.

[0027] The first housing 1 is used to install the first adjusting plate 81 and the second adjusting plate 91. The transmission housing 2 is located below the center of the first housing 1 and is used to accommodate part of the transmission structure. The second housing 3 and the third housing 4 are respectively located on both sides of the transmission housing 2. The second housing 3 and the third housing 4 have the same structure and are arranged opposite to the transmission housing 2. The top ends of the second housing 3 and the third housing 4 are connected to the first housing 1, and the bottom ends of the second housing 3, the transmission housing 2 and the third housing 4 are connected to the base 5.

[0028] The second housing 3 and the third housing 4 have openings 6 on the side opposite to the transmission housing 2. The openings 6 are used to allow the spray nozzles 182 of the corresponding backflushing switching device 18 to communicate with the external sewage area. The two backflushing switching devices 18 are respectively installed in the second housing 3 and the third housing 4. The two backflushing switching devices 18 have the same structure and are arranged in the same direction. Since the openings 6 of the second housing 3 and the third housing 4 are respectively located on the side opposite to the transmission housing 2, when the two backflushing switching devices 18 rotate synchronously, they can form a coordinated state in which one is in the spraying position and the other is in the backflushing position.

[0029] The first housing 1 is provided with multiple injection ports 7, which are used to connect different types of wastewater treatment chemical solutions. The number of injection ports 7 can be determined according to the type of chemical to be added, for example, it can be set to two, three, four or more. The first regulating plate 81 is rotatably disposed in the first housing 1. The first regulating plate 81 is provided with a first water channel 82, which has a head end and a tail end. The head end of the first water channel 82 can be connected to different injection ports 7 as the first regulating plate 81 rotates, thereby realizing the selective connection of different chemical solutions.

[0030] The first motor 12 is connected to the first adjusting plate 81 and is used to drive the first adjusting plate 81 to rotate. When the number of injection ports 7 is N, the single rotation angle of the first adjusting plate 81 can be set to 360° / N, so that the head end of the first water channel 82 can be connected to the corresponding injection port 7 after each rotation. The tail end of the first water channel 82 is connected to the head end of the second water channel 92, so that the pressurized solution entering through the first water channel 82 can continue to enter the second water channel 92.

[0031] The second regulating plate 91 is fixedly installed inside the first housing 1. The second regulating plate 91 is provided with a second water channel 92. The second water channel 92 is a water channel with one inlet and two outlets. The first end of the second water channel 92 is connected to the tail end of the first water channel 82. The two tail ends of the second water channel 92 are respectively connected to the third water channel 102 and the fourth water channel 112. The third regulating plate 101 and the fourth regulating plate 111 are both rotatably installed on the bottom surface of the second regulating plate 91. The third regulating plate 101 is provided with a third water channel 102, and the fourth regulating plate 111 is provided with a fourth water channel 112. The first end of the third water channel 102 is connected to one tail end of the second water channel 92, and the first end of the fourth water channel 112 is connected to the other tail end of the second water channel 92.

[0032] The tail end of the third waterway 102 is connected to the connection port 185 of the backflushing switching device 18 located in the second housing 3, and the tail end of the fourth waterway 112 is connected to the connection port 185 of the backflushing switching device 18 located in the third housing 4; thus, the second waterway 92 can divide the pressure solution input from the first waterway 82 into two paths and deliver them to the two backflushing switching devices 18 respectively.

[0033] The backflush switching device 18 includes a base 181, a cover plate 184, a fixing rod 187, a nozzle 188, a guide plate 189, a connection port 185, a first drain port 183, and a second drain port 186. The base 181 is a partially cylindrical structure. A spray port 182 is provided on one side of the base 181. The spray port 182 is used to correspond to the opening 6 on the second housing 3 or the third housing 4 when the backflush switching device 18 is in the spraying position, so that the nozzle 188 can spray the pressurized solution outward. A first drain port 183 is provided on the base 181. The first drain port 183 is used to connect with the auxiliary water channel 16 when the backflush switching device 18 is in the backflush position, so as to discharge the backflushed liquid and impurities.

[0034] A cover plate 184 is disposed at the notch of the base 181. The cover plate 184 and the base 181 together form a rotatable column structure, allowing the backflushing switching device 18 to rotate smoothly within the second housing 3 or the third housing 4. A connection port 185 is provided at the top of the cover plate 184, which is used to communicate with the third water channel 102 or the fourth water channel 112. A second drain port 186 is provided at the bottom of the cover plate 184, which is used to communicate with the auxiliary water channel 16 when the backflushing switching device 18 is in the spraying position, so that the pressurized solution in the auxiliary water channel 16 can enter the internal space of the cover plate 184.

[0035] The fixing rod 187 is positioned on the axis of the column structure formed by the base 181 and the cover plate 184; the bottom end of the fixing rod 187 can be fixed to the base 5, and the top end of the fixing rod 187 is rotatably supported on the third adjusting plate 101 or the fourth adjusting plate 111; the base 181 and the cover plate 184 are connected to the corresponding third adjusting plate 101 or the fourth adjusting plate 111, and can rotate synchronously with the third adjusting plate 101 or the fourth adjusting plate 111; the fixing rod 187 remains fixed when the base 181 and the cover plate 184 rotate, thereby allowing the nozzle 188 to switch positions relative to the spray port 182 and the cover plate 184.

[0036] The nozzle 188 is mounted on the fixed rod 187 and has an input end and an output end. Preferably, there are multiple nozzles 188, which are spaced apart along the length of the fixed rod 187, and the output ends of the multiple nozzles 188 all face the direction of the spray port 182. By distributing multiple nozzles 188 along the length of the fixed rod 187, the spray coverage of the pesticide solution can be expanded and the spray uniformity can be improved.

[0037] A guide plate 189 is disposed between a cover plate 184 and a fixing rod 187, and the guide plate 189 is arranged along the length direction of the fixing rod 187. A space for receiving pressurized solution is formed between the guide plate 189 and the cover plate 184, and a space corresponding to multiple nozzles 188 is formed between the guide plate 189 and the fixing rod 187. A through hole 1810 is opened at the bottom end of the guide plate 189 corresponding to the second drain port 186. The through hole 1810 is used to allow the pressurized solution entering from the second drain port 186 to enter the space between the guide plate 189 and the cover plate 184 when the backflush switching device 18 is in the spraying position, and to disperse along the length direction of the fixing rod 187 under the guidance of the guide plate 189 and enter multiple nozzles 188.

[0038] The guide plate 189 may be provided with one or more of the following structures: guide groove, guide hole, guide rib, gradient gap or diversion protrusion, to improve the uniformity of pressure solution distribution among multiple nozzles 188; the guide plate 189 may also guide the pressure solution entering from the connection port 185 in the backflush position, so that the pressure solution flows preferentially to the output end side of the nozzle 188, thereby improving the backflush cleaning effect on the output end of the nozzle 188 and the inside of the nozzle 188.

[0039] Within the same backflush switching device 18, the first drain port 183 and the second drain port 186 are not simultaneously connected to the auxiliary water channel 16. When the backflush switching device 18 is in the spraying position, the second drain port 186 is connected to the auxiliary water channel 16, and the first drain port 183 rotates to the non-connected area of ​​the base 5, with no passage or a closed state below the first drain port 183. When the backflush switching device 18 is in the backflush position, the first drain port 183 is connected to the auxiliary water channel 16, and the second drain port 186 rotates to the non-connected area of ​​the base 5, with no passage or a closed state below the second drain port 186. This structure can prevent the two drain ports within the same backflush switching device 18 from being simultaneously connected, thus avoiding a short circuit in the pressure solution.

[0040] An auxiliary water channel 16 is disposed on the base 5 and located between two backflush switching devices 18. The auxiliary water channel 16 has a first end and a second end. The first end of the auxiliary water channel 16 is located on the rotation path of the first drain port 183 and the second drain port 186 of one backflush switching device 18, and the second end of the auxiliary water channel 16 is located on the rotation path of the first drain port 183 and the second drain port 186 of the other backflush switching device 18. The auxiliary water channel 16 is used to transport the pressurized solution discharged from the backflush switching device 18 in the backflush position through the first drain port 183 to the second drain port 186 of the other backflush switching device 18 in the spraying position.

[0041] The cleaning device 17 is installed on the auxiliary waterway 16 and is used to filter and discharge the pressurized solution flowing through the auxiliary waterway 16. The cleaning device 17 includes a filter plate 171, a spiral blade 172, a third motor 173, and a sewage discharge channel 174. The filter plate 171 is located in the middle of the auxiliary waterway 16 and intersects with the flow direction of the auxiliary waterway 16. It is used to intercept sludge particles, chemical deposits, flocculent impurities, and other backwashed materials in the pressurized solution.

[0042] The filter plate 171 is preferably an arc-shaped structure, and the filter plate 171 can rotate between a first filtration position and a second filtration position. When the pressurized solution in the auxiliary water channel 16 flows from one side backflushing switching device 18 to the other side backflushing switching device 18, the inner side of the arc of the filter plate 171 faces the incoming side of the pressurized solution. When the pressurized solution in the auxiliary water channel 16 flows in the opposite direction, the filter plate 171 can rotate to another filtration position, so that the inner side of the arc of the filter plate 171 still faces the incoming side of the pressurized solution. Thus, no matter how the liquid flow direction in the auxiliary water channel 16 changes, the filter plate 171 can always face the incoming flow with the inner side of the arc, thereby improving the impurity interception effect.

[0043] The spiral blade 172 is positioned on the axis of the filter plate 171 and corresponds to the inner arc side of the filter plate 171. The third motor 173 is located inside the base 5 and connected to the spiral blade 172 to drive the spiral blade 172 to rotate. When the spiral blade 172 rotates, it can scrape off the impurities trapped on the inner arc side of the filter plate 171 and transport the scraped impurities along the axial direction of the spiral blade 172 to the sewage channel 174.

[0044] The drain channel 174 is located at the bottom of the base 5 and below the spiral blade 172, and is used to receive impurities transported by the spiral blade 172. The tail end of the drain channel 174 is detachably equipped with a sealing plate 175. When the device is running, the sealing plate 175 closes the drain channel 174 to reduce liquid leakage. When cleaning is required, the sealing plate 175 can be removed to discharge the impurities accumulated in the drain channel 174.

[0045] The second motor 13 is disposed between the third adjusting disc 101 and the fourth adjusting disc 111. The second motor 13 has a first output end and a second output end. The first output end is connected to the first transmission disc 14. The outer wall of the first transmission disc 14 meshes with the outer wall of the third adjusting disc 101 and the outer wall of the fourth adjusting disc 111, respectively, to drive the third adjusting disc 101 and the fourth adjusting disc 111 to rotate synchronously. When the third adjusting disc 101 and the fourth adjusting disc 111 rotate, they respectively drive the base 181 and the cover plate 184 of the corresponding backflush switching device 18 to rotate, so that the spraying position and backflush position of the two backflush switching devices 18 are interchanged.

[0046] The second output end of the second motor 13 is connected to the transmission rod 15, and the transmission rod 15 is connected to the filter plate 171. While driving the third adjustment disk 101 and the fourth adjustment disk 111 to rotate synchronously, the second motor 13 can drive the filter plate 171 to rotate through the transmission rod 15, so that the inner side of the filter plate 171 can adjust its orientation according to the change of the flow direction of the pressure solution in the auxiliary water channel 16. As an alternative embodiment, the filter plate 171 can also be driven to rotate by an independent motor, gear assembly, connecting rod assembly or cam assembly.

[0047] To improve the operational stability of the device, a sealing ring or elastic sealing edge can be provided on the outer periphery of the columnar structure formed by the base 181 and the cover plate 184. The sealing ring or elastic sealing edge is used to seal with the inner wall of the second housing 3 or the third housing 4 to reduce the leakage of pressurized solution between the backflushing switching device 18 and the corresponding housing. The third adjusting plate 101 and the fourth adjusting plate 111 can also be provided with a limiting structure, which can be a limiting groove, a limiting block, a positioning pin, an elastic positioning element or a stop, to ensure that the backflushing switching device 18 is accurately stopped at the spraying position or the backflushing position.

[0048] The above describes the structural composition and connection relationship of this embodiment. In this embodiment, the two backflush switching devices 18, the auxiliary waterway 16 and the cleaning device 17 cooperate with each other so that when one backflush switching device 18 is in the backflush state, the other backflush switching device 18 can be in the spraying state. The backflushed liquid is filtered by the filter plate 171 and discharged by the spiral blades 172 before entering the spraying path on the other side, thereby improving the cleaning effect of the nozzle 188 and the stability of continuous spraying.

[0049] Working principle: During operation, depending on the type of agent to be added, different types of pressurized solutions are introduced into multiple injection ports 7. The first motor 12 drives the first regulating plate 81 to rotate, causing the first water channel 82 within the first regulating plate 81 to rotate synchronously with the first regulating plate 81. When the head end of the first water channel 82 rotates to a position corresponding to one of the injection ports 7, the pressurized solution in that injection port 7 enters the first water channel 82. When the number of injection ports 7 is N, the first regulating plate 81 rotates by an angle of 360° / N each time. Thus, the head end of the first water channel 82 can sequentially connect with different injection ports 7, allowing... Different reagent solutions enter the device in a set order. After the pressurized solution enters the first water channel 82, it enters the second water channel 92 in the second regulating plate 91 from the tail end of the first water channel 82. Since the second water channel 92 is a water channel with one inlet and two outlets, the pressurized solution entering the second water channel 92 is divided into two paths, which enter the third water channel 102 and the fourth water channel 112 respectively. The third water channel 102 is connected to the connection port 185 of one backflush switching device 18, and the fourth water channel 112 is connected to the connection port 185 of another backflush switching device 18, thereby providing pressurized solution to the two backflush switching devices 18.

[0050] In the first working state, the backflush switching device 18 in the second housing 3 is in the spraying position, and the backflush switching device 18 in the third housing 4 is in the backflush position. At this time, the spray port 182 of the backflush switching device 18 in the second housing 3 corresponds to the opening 6 on the second housing 3, and the output end of the nozzle 188 faces the external sewage area, enabling the spraying of chemicals. At the same time, the cover plate 184 of the backflush switching device 18 in the third housing 4 is located outside the output end of the nozzle 188, so that the output end of the nozzle 188 is within the space enclosed by the base 181 and the cover plate 184, enabling the backflush cleaning of the nozzle 188.

[0051] Taking the backflush switching device 18 inside the third housing 4 as an example, the pressurized solution enters the connection port 185 of the backflush switching device 18 through the fourth water channel 112. Since the backflush switching device 18 is in the backflush position, the second drain port 186 at the bottom of the cover plate 184 is not connected to the auxiliary water channel 16, and the area below the second drain port 186 is closed. After the pressurized solution enters the space enclosed by the cover plate 184 and the base 181 through the connection port 185, it flows towards the output end of the nozzle 188 under the guidance of the guide plate 189. Since the output end of the nozzle 188 is blocked by the cover plate 184 in the internal space, the pressurized solution can... The pressure solution is concentrated near the output end of the nozzle 188. Then, the pressure solution enters the nozzle 188 from the output end side and backwashes the inside of the nozzle 188. At this time, sludge particles, chemical deposits, flocculent impurities and other blockages that may be attached to the nozzle 188 will be flushed away from the nozzle 188 under the action of the reverse water flow. The backwashed liquid carries the detached impurities and is discharged through the first drain port 183 of the backwash switching device 18. Since the backwash switching device 18 is in the backwash position, the first drain port 183 is connected to the auxiliary water channel 16. Therefore, the backwash liquid enters the auxiliary water channel 16 in the base 5.

[0052] After the backflush fluid enters the auxiliary water channel 16, it flows from the backflush side to the spraying side along the auxiliary water channel 16. A cleaning device 17 is installed in the middle of the auxiliary water channel 16. When the backflush fluid flows through the cleaning device 17, it first passes through the filter plate 171. The filter plate 171 has an arc-shaped structure, and its inner arc faces the incoming flow side of the current backflush fluid. Because the inner arc of the filter plate 171 faces the incoming flow direction, sludge particles, chemical deposits, flocculent impurities, etc. in the backflush fluid will be intercepted on the inner arc of the filter plate 171. The filtered liquid continues to flow along the auxiliary water channel 16, while impurities are retained at the filter plate 171. The third motor 173 drives the spiral blade 172 to rotate. The spiral blade 172 is located at the filter plate. At the axial position of plate 171, when the spiral blade 172 rotates, it can scrape off the impurities attached to the inner side of the filter plate 171 arc, and on the other hand, it can transport the scraped impurities axially to the drain channel 174. The drain channel 174 is located at the bottom of the base 5 and below the spiral blade 172. The impurities pushed by the spiral blade 172 enter the drain channel 174 for temporary storage. When the device is running, the tail end of the drain channel 174 can be closed by the sealing plate 175. When cleaning is required, the sealing plate 175 can be removed to discharge the impurities accumulated in the drain channel 174. Through this process, the impurities in the backflushing liquid will not directly enter the nozzle 188 on the other side, which can reduce the risk of secondary blockage caused by backflushing debris.

[0053] After being filtered by the auxiliary water channel 16, the pressurized solution continues to flow into the backflush switching device 18 located in the spray position inside the second housing 3. At this time, the second drain port 186 of the backflush switching device 18 is connected to the auxiliary water channel 16, and the first drain port 183 is located in the non-connected area of ​​the base 5. There is no passage below the first drain port 183 or it is in a closed state. The pressurized solution enters the second drain port 186 of the backflush switching device 18 from the auxiliary water channel 16, and then enters the space formed between the cover plate 184 and the guide plate 189 through the through hole 1810 at the bottom of the guide plate 189. The guide plate 189 is set along the length of the fixed rod 187. After the pressurized solution enters the space between the guide plate 189 and the cover plate 184, it will not concentrate on a single nozzle 18. 8. Instead, the pressure solution is dispersed along the length of the fixed rod 187 under the guidance of the guide plate 189. Then, the pressure solution enters the space formed between the guide plate 189 and the fixed rod 187 and enters the input end of multiple nozzles 188 respectively. Multiple nozzles 188 are spaced apart along the length of the fixed rod 187, so the pressure solution can be sprayed from the output end of multiple nozzles 188. Since the backflush switching device 18 is in the spraying position, the spray port 182 on the base 181 corresponds to the opening 6 on the second housing 3. The output end of the nozzle 188 faces the spray port 182. Therefore, after the pressure solution is sprayed from the output end of the nozzle 188, it is sprayed into the external sewage area through the spray port 182 and the opening 6 on the second housing 3, realizing the spraying of the chemical solution.

[0054] When the next chemical solution needs to be added, the first motor 12 drives the first adjusting plate 81 to rotate again. After the first adjusting plate 81 rotates, the head end of the first water channel 82 switches from the current injection port 7 to the next injection port 7, allowing the next chemical solution to enter the first water channel 82. The next chemical solution then enters the second water channel 92 and is diverted through the second water channel 92 to the third water channel 102 and the fourth water channel 112. At the same time, the second motor 13 starts, and the first output end of the second motor 13 drives the first transmission plate 14 to rotate. The first transmission plate 14 engages with the third adjusting plate 101 and the fourth adjusting plate 111 respectively. Therefore, when the first transmission plate 14 rotates, it can... The third adjustment disc 101 and the fourth adjustment disc 111 are driven to rotate synchronously. When the third adjustment disc 101 and the fourth adjustment disc 111 rotate, they respectively drive the base 181 and the cover plate 184 of the corresponding backflush switching device 18 to rotate synchronously. Since the base 181 and the cover plate 184 rotate relative to the fixed rod 187, while the fixed rod 187 remains stationary, the position of the nozzle 188 relative to the spray port 182 and the cover plate 184 changes. When the third adjustment disc 101 and the fourth adjustment disc 111 rotate 180°, the backflush switching device 18, which was originally in the spray position, becomes the backflush position.

[0055] After the two backflush switching devices 18 switch states, the liquid flow direction in the auxiliary water channel 16 will also change. For example, in the first stage, the backflush liquid flows from the third housing 4 side to the second housing 3 side; after switching, the backflush liquid flows from the second housing 3 side to the third housing 4 side. In order to ensure that the filter plate 171 can always effectively trap impurities in the backflush liquid, the filter plate 171 is set as a rotatable structure. The second output end of the second motor 13 is connected to the filter plate 171 through the transmission rod 15. When the second motor 13 drives the third adjusting plate 101 and the fourth adjusting plate... When the two backwash switching devices 18 are rotated to switch states, the second motor 13 also drives the filter plate 171 to rotate synchronously by 180° through the transmission rod 15. After the filter plate 171 rotates, its inner arc side changes from facing one side to facing the other side. In this way, no matter which side the pressurized solution in the auxiliary water channel 16 flows in from, the inner arc side of the filter plate 171 can face the incoming flow side. This setting can make impurities preferentially collected on the inner arc side of the filter plate 171, and then scraped off by the spiral blades 172 and transported to the sewage channel 174, thereby improving the filtration effect under bidirectional flow conditions.

[0056] During operation, this device does not simply spray the chemical solution from nozzle 188. Instead, it combines sequential chemical input, backflushing of nozzle 188, filtration of backflushing fluid, discharge of impurities, and spraying from the other side. Specifically, the chemical solution first enters the side in the backflushing position, backflushing the nozzle 188 on that side. The backflushing fluid, carrying impurities, enters the auxiliary water channel 16, where it is filtered by filter plate 171 and discharged by spiral blades 172. The filtered pressurized solution then enters the backflushing switching device 18 in the spraying position on the other side, and passes through multiple... The nozzle 188 sprays into the sewage. When switching to the next agent, the two backwash switching devices 18 rotate 180°, and the spraying side and backwashing side are interchanged. The filter plate 171 also flips synchronously to adapt to the change in flow direction in the auxiliary water channel 16. Through the above process, the device can make the two backwash switching devices 18 alternately spray and backwash while multiple agents are added in sequence. Before the backwash liquid enters the nozzle 188 on the other side, the impurity filtration and sewage discharge are completed, thereby improving the uniformity of agent spraying, the cleaning effect of nozzle 188, and the stability of continuous operation of the device.

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

Claims

1. A wastewater treatment agent solution spraying device for wastewater treatment, characterized in that, include: Backflush switching device (18), the backflush switching device (18) includes: A base (181) is provided with a spray nozzle (182) on one side of the base (181) and a first drain outlet (183) is provided on the base (181). A cover plate (184) is provided at the notch of the base (181). The cover plate (184) and the base (181) together form a rotatable column structure. The top of the cover plate (184) is provided with a connection port (185), and the bottom of the cover plate (184) is provided with a second drain port (186). A fixing rod (187) is provided at the axial position of the column structure formed by the base (181) and the cover plate (184), and the base (181) and the cover plate (184) are rotatable relative to the fixing rod (187). A nozzle (188) is disposed on the fixed rod (187), and the nozzle (188) has an input end and an output end; A guide plate (189) is disposed between the cover plate (184) and the fixing rod (187). The guide plate (189) is connected to the connection port (185) and is used to guide the pressure solution entering through the connection port (185) to the nozzle (188). The bottom end of the guide plate (189) is provided with a through hole (1810) corresponding to the second drain port (186). The base (181) and cover plate (184) are rotatable relative to the fixed rod (187) between the spraying position and the backflush position; At the spraying position, the spray nozzle (182) corresponds to the output end of the nozzle (188), and the connection port (185) is connected to the input end of the nozzle (188) through the guide plate (189), so that the pressurized solution enters from the input end of the nozzle (188) and is sprayed out from the output end of the nozzle (188) through the spray nozzle (182); In the backflush position, the cover plate (184) is located outside the output end of the nozzle (188), so that the output end of the nozzle (188) is within the space enclosed by the base (181) and the cover plate (184). The connection port (185) is connected to the output end side of the nozzle (188), so that the pressurized solution enters from the output end side of the nozzle (188) and is discharged through the first drain port (183). The guide plate (189) is disposed between the cover plate (184) and the fixed rod (187) along the length direction of the fixed rod (187). A space for receiving pressurized solution is formed between the guide plate (189) and the cover plate (184). A space corresponding to multiple nozzles (188) is formed between the guide plate (189) and the fixed rod (187). When the backflush switching device (18) is in the spraying position, the guide plate (189) disperses the pressurized solution entering from the second drain port (186) and the through hole (1810) along the length direction of the fixed rod (187) and guides the pressurized solution into multiple nozzles (188) respectively, so as to improve the uniformity of liquid supply of multiple nozzles (188). The base (181) and cover plate (184) can rotate relative to the fixed rod (187) between two working positions with a rotation angle of 180° between the two working positions. One working position corresponds to the spraying position and the other working position corresponds to the backflush position.

2. The wastewater treatment agent solution spraying device for wastewater treatment according to claim 1, characterized in that, Wastewater treatment chemical solution spraying device also includes: First shell (1); The transmission housing (2) is located below the center of the first housing (1); The second housing (3) is disposed on one side of the transmission housing (2), and the top end of the second housing (3) is connected to the first housing (1); The third housing (4) is disposed on the other side of the transmission housing (2), and the top of the third housing (4) is connected to the first housing (1); The base (5) is connected to the bottom of the second housing (3), the transmission housing (2) and the third housing (4), and the bottom of the fixing rod (187) is fixed on the base (5); Openings (6) are respectively opened on the side of the second housing (3) and the third housing (4) facing away from the transmission housing (2); The injection port (7) is provided on the first housing (1), and there are multiple injection ports (7); The first adjusting disc (81) is rotatably disposed inside the first housing (1); The first water channel (82) is located inside the first regulating plate (81), and the head end of the first water channel (82) can be connected to any of the injection ports (7); The second adjustment disc (91) is fixedly installed inside the first housing (1); The second waterway (92) is located inside the second regulating plate (91). The head end of the second waterway (92) is connected to the tail end of the first waterway (82). The second waterway (92) is a waterway with one inlet and two outlets. The third adjusting plate (101) is rotatably mounted on the bottom surface of the second adjusting plate (91); The third waterway (102) is located inside the third regulating plate (101), and the head end of the third waterway (102) is connected to one tail end of the second waterway (92); The fourth adjusting plate (111) is rotatably mounted on the bottom surface of the second adjusting plate (91); The fourth waterway (112) is located inside the fourth regulating plate (111), and the head end of the fourth waterway (112) is connected to the other tail end of the second waterway (92); The first motor (12) is connected to the first adjusting disk (81) and is used to drive the first adjusting disk (81) to rotate; There are two recoil switching devices (18), and the two recoil switching devices (18) have the same structure and are respectively arranged in the second housing (3) and the third housing (4) in the same direction; The tail end of the third waterway (102) is connected to the connection port (185) of a backflush switching device (18), and the tail end of the fourth waterway (112) is connected to the connection port (185) of another backflush switching device (18). The spray nozzles (182) of the two backflush switching devices (18) can correspond to the corresponding openings (6).

3. The wastewater treatment agent solution spraying device according to claim 2, characterized in that: The number of injection ports (7) is N, and the single rotation angle of the first adjusting plate (81) is 360° / N.

4. A wastewater treatment agent solution spraying device according to claim 3, characterized in that, The wastewater treatment agent solution spraying device for wastewater treatment further includes: an auxiliary water channel (16), which is disposed on the base (5) and located between the two backflushing switching devices (18). The auxiliary water channel (16) has a first end and a second end. The first end of the auxiliary water channel (16) is located on the rotation path of the first drain port (183) and the second drain port (186) of one of the backflushing switching devices (18), and the second end of the auxiliary water channel (16) is located on the rotation path of the first drain port (183) and the second drain port (186) of the other backflushing switching device (18).

5. A wastewater treatment agent solution spraying device according to claim 4, characterized in that, Wastewater treatment chemical solution spraying device also includes: A cleaning device (17) is installed on the auxiliary waterway (16); A filter plate (171) is disposed in the middle of the auxiliary water channel (16) for filtering the solution flowing through the auxiliary water channel (16); Spiral blades (172) are positioned along the axis of the filter plate (171) to scrape off and transport the impurities trapped by the filter plate (171); The third motor (173) is located inside the base (5) and connected to the spiral blade (172) for driving the spiral blade (172) to rotate; The drain channel (174) is located at the bottom of the base (5) and below the spiral blade (172) for receiving impurities transported by the spiral blade (172).

6. A wastewater treatment agent solution spraying device according to claim 5, characterized in that, Wastewater treatment chemical solution spraying device also includes: The second motor (13) is disposed between the third regulating plate (101) and the fourth regulating plate (111), and the second motor (13) has a first output terminal and a second output terminal; The first transmission disk (14) is connected to the first output end of the second motor (13), and the outer wall of the first transmission disk (14) meshes with the outer wall of the third adjustment disk (101) and the outer wall of the fourth adjustment disk (111), respectively. The transmission rod (15) is connected to the second output end of the second motor (13) and is connected to the filter plate (171); The second motor (13) drives the third adjustment disk (101) and the fourth adjustment disk (111) to rotate synchronously through the first transmission disk (14), and drives the filter plate (171) to rotate through the transmission rod (15).

7. A wastewater treatment agent solution spraying device according to claim 6, characterized in that: The filter plate (171) has an arc-shaped structure and can rotate between a first filtration position and a second filtration position. When the pressure solution flows from one of the backflush switching devices (18) to another, the inner side of the arc of the filter plate (171) faces the incoming side of the pressure solution. When the pressure solution flows in the opposite direction, the filter plate (171) rotates to another filtration position so that the inner side of the arc of the filter plate (171) still faces the incoming side of the pressure solution.

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