An automatic quantitative medicine dissolving device for sewage treatment

Abstract

The present invention discloses an automated quantitative drug dissolution device for sewage treatment, belonging to the technical field of sewage treatment equipment. The device comprises a drug dissolution box, a quantitative drug dosing mechanism disposed on the drug dissolution box, a quantitative water inlet system, and a PLC control module communicatively connected to the quantitative drug dosing mechanism and the quantitative water inlet system. The PLC control module is used to control the quantitative water inlet system and the quantitative drug dosing mechanism to simultaneously add a quantitative amount of water and a drug into the drug dissolution box. The present invention uses the PLC control module to control the quantitative water inlet system and the quantitative drug dosing mechanism to automatically and simultaneously add a quantitative amount of water and a drug into the drug dissolution box. The drug dosage and water inlet volume are accurately matched, so that the concentration of the drug prepared in the drug dissolution box is stable and consistent, thereby improving the automation level and standardization degree of the drug dissolution device.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment equipment technical field, specifically to a kind of automatic quantitative medicine dissolving device for sewage treatment. BACKGROUND

[0002] Sewage treatment is to make sewage meet the water quality requirements for its purification process before being discharged into a water body or reused, sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering and other fields, and more and more into the daily life of ordinary people, sewage treatment equipment is an industrial equipment that can effectively treat municipal sewage, industrial wastewater and the like, to avoid sewage and pollutants directly into water, to improve the ecological environment, promote urban grade and promote economic development with important significance.

[0003] At present, environmental protection requirements are increasingly strict, and the requirements for wastewater treatment are increasingly high, and the management level of wastewater station is also improved accordingly, while the mobility of operating personnel is very high, to ensure the treatment effect of wastewater treatment facilities, it is necessary to improve the automation level and standardization degree of equipment.

[0004] The existing medicine dissolving device generally has the following problems: 1. manual time supplement is required, due to the volume limitation of the medicine storage, frequent medicine addition, and manual medicine carrying to a high place, which also increases the workload of medicine dissolving; 2. after the medicine absorbs moisture in the air, the medicine will be bonded in the medicine storage tank, the medicine cannot enter the medicine dissolving tank normally, and the quantitative medicine adding device will also be blocked; 3. the medicine amount and the water amount cannot be accurately matched, resulting in unstable medicine concentration prepared by the medicine dissolving tank, which is not conducive to the quantitative control of medicine concentration; 4. when the medicine is quantitatively delivered to the medicine dissolving tank, a small amount of medicine will splash onto the medicine dissolving tank, pollute the medicine dissolving equipment, and cause the medicine adding environment to be poor. SUMMARY

[0005] In view of this, the purpose of the present application is to provide an automatic quantitative medicine dissolving device for sewage treatment to solve one or more of the problems existing in the prior art.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] An automatic quantitative medicine dissolving device for sewage treatment, comprising a medicine dissolving tank and a PLC control module, a quantitative medicine adding mechanism and a quantitative water feeding system are arranged on the medicine dissolving tank, and the PLC control module is used to control the quantitative water feeding system and the quantitative medicine adding mechanism to add quantitative water and medicine into the medicine dissolving tank at the same time.

[0008] The quantitative medicine adding mechanism comprises:

[0009] The dosing barrel is arranged on the top of the medicine dissolving tank, and an inner container is arranged in the dosing barrel.

[0010] A variable frequency motor is arranged on the top of the dosing barrel, and the output end of the variable frequency motor is fixedly connected with one end of a rotating shaft arranged in the dosing barrel.

[0011] A quantitative spiral piece is spirally arranged on the outer periphery of the rotating shaft, and the quantitative spiral piece is located in the lower cylindrical cavity.

[0012] A level meter is arranged in the dosing barrel, and the level meter and the variable frequency motor are communicatively connected through the PLC control module.

[0013] As a further scheme of the present application, the quantitative water feeding system comprises a water feeding main pipeline, and a pressure switch, an electromagnetic valve and a water feeding flow meter which are arranged on the water feeding main pipeline and communicatively connected with the PLC control module.

[0014] As a further scheme of the present application, the dosing barrel further comprises a splashing medicine cleaning device, which comprises:

[0015] A medicine feeding cylinder is arranged between the medicine outlet of the lower cylindrical cavity and the medicine inlet of the medicine dissolving tank, and one end of the medicine feeding cylinder connected with the medicine inlet of the medicine dissolving tank is a conical cavity.

[0016] A branch pipeline is arranged between the water feeding main pipeline and the medicine feeding cylinder.

[0017] A cyclone member is arranged in the medicine feeding cylinder, and the cyclone member is in communication with the branch pipeline and is used for forming a cyclone at the conical cavity of the medicine feeding cylinder.

[0018] As a further scheme of the present application, the cyclone member comprises a water storage ring, a plurality of nozzles and a protective cover, the water storage ring is attached to the inner wall of the medicine feeding cylinder, the nozzles are inclinedly arranged at the bottom of the water storage ring in the same direction, the nozzles are directed to the conical cavity of the medicine feeding cylinder, and the protective cover covers the water storage ring and the nozzles to form a sealed space in the protective cover.

[0019] As a further scheme of the present application, at least two scraping arms are fixedly arranged on the outer periphery of the middle part of the rotating shaft, and the scraping arms are used for preventing the medicine from adhering to the inner wall of the dosing barrel and the upper conical cavity.

[0020] As a further scheme of the present application: the scraping arm comprises an integral vertical arm, a horizontal rod and an inclined arm, the vertical arm is in sliding fit with the inner wall of the medicating barrel, the inclined arm is in sliding fit with the inner wall of the upper conical cavity, and a plurality of horizontal rods are used to fixedly connect the vertical arm and the inclined arm with the rotating shaft.

[0021] As a further scheme of the present application: further comprising a storage tank and a spiral conveyor, the storage tank is used to store medicaments, and the spiral conveyor is used to convey the medicaments in the storage tank into the medicating barrel.

[0022] As a further scheme of the present application: the storage tank is provided with a level meter and a temperature sensor, and the periphery of the storage tank is wrapped with an electric heating wire mesh, the level meter and the spiral conveyor are in communication connection through the PLC control module, and the temperature sensor and the electric heating wire mesh are in communication connection through the PLC control module.

[0023] As a further scheme of the present application: a plurality of stirrers are further arranged on the dissolving tank, and the stirrers are used to stir and mix the water and the medicaments added into the dissolving tank quantitatively.

[0024] The present application has the following beneficial effects:

[0025] (1) The present application sets the quantitative water feeding system, the quantitative medicament adding mechanism, and the PLC control module in communication connection with the quantitative medicament adding mechanism and the quantitative water feeding system; the PLC control module controls the quantitative water feeding system and the quantitative medicament adding mechanism to automatically add quantitative water and medicaments into the dissolving tank at the same time, the medicament amount and the water amount are accurately matched, the concentration of the medicaments prepared in the dissolving tank is stable and consistent, and the automation level and the standardization degree of the dissolving device are improved.

[0026] (2) The present application sets the scraping arm, in the process of adding medicaments into the dissolving tank quantitatively by the quantitative medicament adding mechanism, the scraping arm rotates synchronously with the rotating shaft, the inclined arm in fit with the inner wall of the medicating barrel scrapes off the medicaments adhered to the inner wall of the medicating barrel, the inclined arm in fit with the inner wall of the upper conical cavity scrapes off the medicaments adhered to the inner wall of the upper conical cavity, thereby preventing the medicaments from adhering to the inner walls of the medicating barrel and the upper conical cavity, and ensuring that the medicaments can quickly fall into the lower cylindrical cavity.

[0027] (3) The present application sets the splashed medicament cleaning device, the splashed medicament cleaning device comprises a medicine conveying cylinder, branch pipelines and a cyclone, in the process of adding medicaments into the dissolving tank quantitatively by the quantitative medicament adding mechanism, the cyclone can form a cyclone at the conical cavity of the medicine conveying cylinder by the water entering from the branch pipelines, thereby cleaning and flushing the medicaments splashed onto the inner wall of the conical cavity of the medicine conveying cylinder into the dissolving tank, preventing the medicaments from long-term accumulation and clogging the conical cavity, and the splashed medicaments also float into the surrounding air, polluting the environment and harming the health of workers. BRIEF DESCRIPTION OF DRAWINGS

[0028] The application will be further described in conjunction with the accompanying drawings.

[0029] Figure 1 is the overall structure of the automatic quantitative medicine dissolving device for sewage treatment;

[0030] Figure 2 is the structure of the quantitative medicine adding mechanism and the scraping arm;

[0031] Figure 3 is the structure of the automatic quantitative medicine dissolving device for sewage treatment (not including the medicine storage tank and the spiral conveyor);

[0032] Figure 4 is Figure 3 is the enlarged schematic view of the structure at A in

[0033] Figure 5 is the structure of the splash medicine cleaning device from the top view;

[0034] Figure 6 is the structure of the medicine storage tank and the spiral conveyor.

[0035] In the figure: 1, medicine dissolving tank; 2, quantitative medicine adding mechanism; 21, medicine adding barrel; 22, inner container; 221, upper conical cavity; 222, lower cylindrical cavity; 23, variable frequency motor; 24, rotating shaft; 25, quantitative spiral piece; 3, quantitative water inlet system; 31, water inlet main pipeline; 32, pressure switch; 33, electromagnetic valve; 34, water inlet flow meter; 4, splash medicine cleaning device; 41, medicine inlet cylinder; 42, branch pipeline; 43, cyclone; 431, water storage ring; 432, nozzle; 433, protective cover; 5, scraping arm; 51, vertical arm; 52, horizontal rod; 53, inclined arm; 6, medicine storage tank; 7, spiral conveyor; 8, temperature sensor; 9, electric heating wire mesh; 10, stirrer; 11, medicine outlet metering pump; 12, level meter. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0037] Please refer to Figures 1-6As shown, the embodiment of the present application provides an automatic quantitative medicine dissolving device for sewage treatment, which comprises a medicine dissolving tank 1, a quantitative medicine adding mechanism 2 arranged on the medicine dissolving tank 1, a quantitative water feeding system 3, and a PLC control module (not shown in the figure) in communication connection with the quantitative medicine adding mechanism 2 and the quantitative water feeding system 3, wherein the PLC control module is used to control the quantitative water feeding system 3 and the quantitative medicine adding mechanism 2 to simultaneously add quantitative water and medicine into the medicine dissolving tank 1; that is to say, the present application controls the quantitative water feeding system 3 and the quantitative medicine adding mechanism 2 to simultaneously and automatically add quantitative water and medicine into the medicine dissolving tank 1 through the PLC control module, so that the medicine amount and the water amount are accurately matched, the concentration of the medicine prepared in the medicine dissolving tank 1 is stable and consistent, and the automation level and the standardization degree of the medicine dissolving device are improved.

[0038] In combination Figure 1 and Figure 2 As shown, in one embodiment of the present application, the quantitative medicine adding mechanism 2 comprises a medicine adding barrel 21, a variable frequency motor 23, a rotating shaft 24, a quantitative spiral piece 25, and a level meter 12. The medicine adding barrel 21 is arranged on the top of the medicine dissolving tank 1, and an inner container 22 is arranged in the medicine adding barrel 21, wherein the inner container 22 has a communicating upper conical cavity 221 and a lower cylindrical cavity 222, and the medicine added into the medicine adding barrel 21 falls from the upper conical cavity 221 into the lower cylindrical cavity 222; the variable frequency motor 23 is arranged on the top of the medicine adding barrel 21, and the output end of the variable frequency motor 23 is fixedly connected with one end of the rotating shaft 24 arranged in the medicine adding barrel 21; the quantitative spiral piece 25 is spirally arranged on the outer periphery of the rotating shaft 24, and the quantitative spiral piece 25 is located in the lower cylindrical cavity 222 and is matched with the lower cylindrical cavity 222; and the level meter 12 is arranged in the medicine adding barrel 21, and the level meter 12 and the variable frequency motor 23 are in communication connection with each other through the PLC control module.

[0039] Specifically, the level meter 12 in the medicine adding barrel 21 connects the signal of the level meter 12 to the control circuit of the variable frequency motor 23 through the PLC control module, so that when the height of the medicine detected by the level meter 12 reaches the preset starting or stopping threshold value, the variable frequency motor 23 is automatically controlled to start or stop, and the rotation speed and the time length of the variable frequency motor 23 are set through the PLC control module, so as to control the medicine added into the medicine dissolving tank 1 from the medicine outlet of the lower cylindrical cavity 222, and realize the function of automatic quantitative medicine adding.

[0040] As shown in the figure, Figure 3 In one embodiment of the present application, the quantitative water feeding system 3 comprises a water feeding main pipeline 31, and a pressure switch 32, an electromagnetic valve 33, and a water flow meter 34 arranged on the water feeding main pipeline 31 in sequence, wherein the pressure switch 32, the electromagnetic valve 33, and the water flow meter 34 are in communication connection with the PLC control module.

[0041] When adding water to the medicine dissolving box 1, tap water passes through the pressure switch 32 to ensure the pressure of the water inlet and determine whether it is in the water inlet state. The pressure switch 32 controls the solenoid valve 33, and the solenoid valve 33 starts to inlet water after it is opened. At the same time, the quantitative dosing device starts quantitative dosing, and the water inlet volume is obtained in real time through the water inlet flow meter 34, so as to add a quantitative amount of medicine to a quantitative amount of water, so that the amount of medicine and the water inlet volume are accurately matched, so that the concentration of the medicine prepared in the medicine dissolving box 1 is stable and consistent, and the automation level and standardization level of the medicine dissolving device are improved.

[0042] Combine Figures 3-5 As shown, in one embodiment of the present invention, there is also a splash agent cleaning device 4 in the medicine adding barrel 21, and the splash agent cleaning device 4 includes a medicine delivery cylinder 41, a branch pipe 42 and a swirl member 43. Specifically, as Figure 4 As shown, the drug delivery cartridge 41 is arranged between the drug outlet of the lower cylindrical cavity 222 and the drug inlet of the dissolving drug box 1. One end of the drug delivery cartridge 41 connected to the drug inlet of the dissolving drug box 1 is a conical cavity. The medicine falls into the drug delivery cartridge 41 from the drug outlet of the lower cylindrical cavity 222, and enters the dissolving drug box 1 through the conical cavity of the drug delivery cartridge 41. The powdered medicine will splash onto the inner wall of the conical cavity of the drug delivery cartridge 41 during the falling process; the branch pipeline 42 is arranged between the water delivery main pipeline 31 and the drug delivery cartridge 41;

[0043] The swirl component 43 is arranged in the drug delivery cylinder 41, and the swirl component 43 is connected to the branch pipe 42. The swirl component 43 can make the water entering from the branch pipe 42 form a swirl in the conical cavity of the drug delivery cylinder 41, thereby flushing and cleaning the medicine splashed on the inner wall of the conical cavity of the drug delivery cylinder 41 and then entering the medicine dissolving box 1, preventing the medicine from accumulating for a long time and clogging the conical cavity. The splashed medicine will also float into the surrounding air, polluting the environment and endangering the health of workers.

[0044] like Figure 4 As shown, the swirl element 43 includes a water storage ring 431, a nozzle 432 and a protective cover 433. The water storage ring 431 is attached to the inner wall of the drug delivery barrel 41. Several nozzles 432 are arranged at the bottom of the water storage ring 431 at an angle in the same direction, and the nozzles 432 are facing the conical cavity of the drug delivery barrel 41. The protective cover 433 covers the water storage ring 431 and the nozzles 432 to form a sealed space inside the protective cover 433.

[0045] During the process of quantitatively adding water and medicine, part of the water enters the water storage ring 431 from the branch pipe 42. The water in the water storage ring 431 is sprayed out from the nozzle 432 under the action of pressure and sprayed onto the inner wall of the conical cavity of the drug delivery barrel 41. Since the nozzles 432 are designed to be inclined in the same direction, after all nozzles 432 spray water, a vortex will be formed on the inner wall of the conical cavity of the drug delivery barrel 41. The vortex will flush and clean the medicine splashed onto the inner wall of the conical cavity of the drug delivery barrel 41 and then enter the drug dissolution box 1.

[0046] Further, ifFigure 2 As shown in the drawings, in one embodiment of the present application, at least two scraping arms 5 are fixedly arranged on the outer periphery of the middle part of the rotating shaft 24, and the scraping arms 5 are used to prevent the medicament from adhering to the inner walls of the medicament adding barrel 21 and the upper conical cavity 221. Specifically, the scraping arm 5 comprises an integral vertical arm 51, a horizontal rod 52 and an inclined arm 53, the vertical arm 51 is in sliding fit with the inner wall of the medicament adding barrel 21, the inclined arm 53 is in sliding fit with the inner wall of the upper conical cavity 221, and the plurality of horizontal rods 52 are used to fixedly connect the vertical arm 51 and the inclined arm 53 with the rotating shaft 24.

[0047] In use, during the quantitative medicament adding process, the scraping arms 5 rotate synchronously with the rotating shaft 24, the inclined arm 53 in fit with the inner wall of the medicament adding barrel 21 scrapes off the medicament adhering to the inner wall of the medicament adding barrel 21, and the inclined arm 53 in fit with the inner wall of the upper conical cavity 221 scrapes off the medicament adhering to the inner wall of the upper conical cavity 221, thereby preventing the medicament from adhering to the inner walls of the medicament adding barrel 21 and the upper conical cavity 221, and ensuring that the medicament can quickly fall into the lower cylindrical cavity 222.

[0048] It is to be noted that, as shown in the drawings, Figure 1 and Figure 6 the present application further comprises a medicament storage box 6 and a screw conveyor 7, the medicament storage box 6 is used to store medicament, and the screw conveyor 7 is used to convey the medicament in the medicament storage box 6 into the medicament adding barrel 21.

[0049] The medicament storage box 6 is provided with a level meter 12 and a temperature sensor 8, and the outer periphery of the medicament storage box 6 is wrapped with an electric heating wire mesh 9, the level meter 12 and the screw conveyor 7 are communicatively connected through a PLC control module, and the signal of the level meter 12 is connected to the control circuit of the screw conveyor 7, so that when the level meter 12 detects that the height of the medicament in the medicament storage box 6 reaches a preset starting or stopping threshold, the screw conveyor 7 is automatically controlled to start or stop, thereby further improving the automation degree of the present application; the temperature sensor 8 and the electric heating wire mesh 9 are communicatively connected through a PLC control module, the medicament in the medicament storage box 6 is heated through the electric heating wire mesh 9, so as to prevent the medicament from adhering to the inside of the medicament storage box 6 after absorbing the moisture in the air, and the temperature sensor 8 detects the temperature in the medicament storage box 6, when the temperature sensor 8 detects that the temperature in the medicament storage box 6 reaches a preset starting or stopping threshold, the electric heating wire mesh 9 is automatically controlled to start or stop.

[0050] It can be understood that, as shown in the drawings, Figure 1 a plurality of stirrers 10 are further arranged on the medicament dissolving box 1, the stirrers 10 are used to stir and mix the water and the medicament quantitatively added into the medicament dissolving box 1 uniformly, so as to ensure the uniformity of the dissolution of the medicament, and the quantitatively dissolved medicament is quantitatively conveyed to the medicament using point through the medicament outlet metering pump 11.

[0051] In summary, the automatic quantitative medicine dissolving device is fully automatic, the medicine stored in the medicine storage box 6 is automatically transported to the quantitative medicine adding mechanism 2 by the spiral conveyor 7, the medicine storage box 6 is provided with a material level gauge 12 and an electric heating wire mesh 9, the material level gauge 12 controls the operation of the spiral conveyor 7, and the electric heating wire mesh 9 heats the medicine in the medicine storage box 6 to prevent the medicine from sticking after absorbing moisture in the air.

[0052] After the medicine is transported to the quantitative medicine adding mechanism 2, a variable frequency motor 23 is arranged at the top of the quantitative medicine adding mechanism 2, the variable frequency motor 23 controls the rotating speed and time length of the quantitative spiral piece 25, thereby controlling the medicine adding amount, and realizing the function of automatic quantitative medicine adding. A scraping arm 5 is arranged above the quantitative spiral piece 25, the scraping arm 5 scrapes the medicine adhered to the inner wall of the medicine adding barrel 21 and the upper conical cavity 221, thereby preventing the medicine from sticking to the inner wall of the medicine adding barrel 21 and the upper conical cavity 221, and ensuring that the medicine can quickly fall into the lower cylindrical cavity 222.

[0053] During the process that the medicine is quantitatively transported to the medicine dissolving box 1 by the quantitative spiral piece 25, the splashed medicine cleaning device 4 flushes and cleans the splashed medicine on the inner wall of the medicine transportation cylinder 41 conical cavity and then enters the medicine dissolving box 1, thereby preventing the medicine from being accumulated and clogging the conical cavity for a long time, and preventing the splashed medicine from floating into the surrounding air to pollute the environment and harm the health of workers.

[0054] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, a particular orientation configuration and operation, therefore, it cannot be understood as a limitation on the present application.

[0055] In addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection", etc. should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] The preferred embodiments of the present application have been described in detail above, which cannot be considered as limiting the scope of the implementation of the present application. Any equivalent changes and improvements made within the scope of the present application shall still belong to the patent coverage scope of the present application.

Claims

1. An automated quantitative drug dissolving device for sewage treatment, comprising a drug dissolving box (1) and a PLC control module, characterized in that The drug dissolving box (1) is provided with a quantitative drug adding mechanism (2) and a quantitative water inlet system (3), and the PLC control module is used to control the quantitative water inlet system (3) and the quantitative drug adding mechanism (2) to simultaneously add a quantitative amount of water and drug into the drug dissolving box (1); Wherein, the quantitative dosing mechanism (2) comprises: A medicine-adding barrel (21) is arranged on the top of the medicine-dissolving box (1), wherein an inner liner (22) is installed in the medicine-adding barrel (21), and the inner liner (22) has an upper conical cavity (221) and a lower cylindrical cavity (222) that are connected; A variable frequency motor (23) is arranged on the top of the medicine-adding barrel (21), and an output end of the variable frequency motor (23) is fixedly connected to one end of a rotating shaft (24) arranged in the medicine-adding barrel (21); a quantitative spiral piece (25) spirally arranged on the outer periphery of the rotating shaft (24), wherein the quantitative spiral piece (25) is located in the lower cylindrical cavity (222); A level meter (12) is provided in the dosing barrel (21), wherein the level meter (12) and the variable frequency motor (23) are communicatively connected to each other via the PLC control module; The quantitative water inlet system (3) comprises a main water supply line (31), and a pressure switch (32), a solenoid valve (33) and a water inlet flow meter (34) installed on the main water supply line (31), wherein the pressure switch (32), the solenoid valve (33) and the water inlet flow meter (34) are all connected to the PLC control module for communication. The dosing barrel (21) is further provided with a splashing agent cleaning device (4), and the splashing agent cleaning device (4) comprises: The drug delivery cartridge (41) is arranged between the drug outlet of the lower cylindrical cavity (222) and the drug inlet of the drug dissolving box (1), and one end of the drug delivery cartridge (41) connected to the drug inlet of the drug dissolving box (1) is a conical cavity; A branch pipeline (42) is provided between the main water delivery pipeline (31) and the medicine delivery cylinder (41); A swirl member (43) is disposed in the drug delivery barrel (41), the swirl member (43) being in communication with the branch pipeline (42) and being used to form a swirl at the conical cavity of the drug delivery barrel (41); The swirl element (43) includes a water storage ring (431), a nozzle (432) and a protective cover (433). The water storage ring (431) is attached to the inner wall of the drug delivery barrel (41). A plurality of nozzles (432) are arranged at the bottom of the water storage ring (431) in an inclined manner in the same direction, and the nozzles (432) face the conical cavity of the drug delivery barrel (41). The protective cover (433) covers the water storage ring (431) and the nozzles (432), forming a sealed space in the protective cover (433).

2. The automated quantitative drug dissolving device for sewage treatment according to claim 1, characterized in that: At least two scraper arms (5) are fixedly provided on the outer periphery of the middle portion of the rotating shaft (24), and the scraper arms (5) are used to prevent the medicine from adhering to the inner walls of the medicine adding barrel (21) and the upper conical cavity (221).

3. The automated quantitative drug dissolving device for sewage treatment according to claim 2, characterized in that: The scraper arm (5) includes an integrally connected vertical arm (51), a cross bar (52) and an inclined arm (53); the vertical arm (51) is slidably fitted with the inner wall of the dosing barrel (21); the inclined arm (53) is slidably fitted with the inner wall of the upper conical cavity (221); and a plurality of cross bars (52) are used to fixedly connect the vertical arm (51) and the inclined arm (53) to the rotating shaft (24).

4. The automated quantitative drug dissolving device for sewage treatment according to claim 1, characterized in that: It also includes a medicine storage box (6) and a screw conveyor (7), wherein the medicine storage box (6) is used to store medicines, and the screw conveyor (7) is used to convey the medicines in the medicine storage box (6) to the medicine adding barrel (21).

5. The automated quantitative drug dissolving device for sewage treatment according to claim 4, characterized in that: A level meter (12) and a temperature sensor (8) are provided in the medicine storage box (6); an electric heating wire mesh (9) is wrapped around the outer periphery of the medicine storage box (6); the level meter (12) is communicatively connected to the screw conveyor (7) via the PLC control module; and the temperature sensor (8) is communicatively connected to the electric heating wire mesh (9) via the PLC control module.

6. An automated quantitative drug dissolving device for sewage treatment according to any one of claims 1 to 5, characterized in that: The medicine dissolving box (1) is further provided with a plurality of stirrers (10), and the stirrers (10) are used to stir and mix the water and the medicine added into the medicine dissolving box (1) in a quantitative manner until they are uniformly mixed.

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