Automatic dosing equipment for sewage treatment tank

Abstract

The invention relates to the technical field of sewage treatment, in particular to automatic dosing equipment for a sewage treatment pond, which comprises a shell, a feeding tool for quantitatively feeding a flocculating agent is fixedly arranged at the top of the shell, a cavity is formed in the shell, and a drying mechanism for treating the agglomerated flocculating agent is arranged in the middle of the cavity. A feeding mechanism for uniformly feeding chemicals is arranged at the bottom of the cavity on one side of the drying mechanism; the rubber ball provides continuous impact to the feeding pipe, the generated vibration slowly vibrates the agglomerated flocculating agent to prevent the agglomerated flocculating agent from blocking the feeding pipe, and meanwhile, the hot airflow blown out of the pressurizing pipe improves the temperature of the feeding pipe and dries the flocculating agent attached to the feeding pipe, so that the attached flocculating agent is conveniently vibrated off, and the feeding pipe is prevented from being blocked by the agglomerated flocculating agent. The hot air flow is injected into the mixing box along the hot air pipe and then carries water in the mixing box to be discharged through the L-shaped exhaust pipe, and the situation that the subsequent dissolving effect of the flocculating agent is affected by redundant water in the mixing box is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to automatic dosing equipment for a sewage treatment pool. Background Art

[0002] The automatic dosing equipment of the sewage treatment pool is an environmental protection equipment with automatic control function. It is mainly used to accurately add various chemicals, such as flocculants, disinfectants, regulators, etc., to the sewage to improve the effect of sewage treatment and ensure that the effluent water quality meets the relevant standards; the flocculant includes polyacrylamide in the state of powder particles, and before the flocculant is added into the sewage pool, it needs to be mixed with clean water before use;

[0003] Since the automatic dosing equipment of the sewage treatment pool is located near the sewage pool all year round, the powdered flocculant stored inside it is prone to moisture and agglomeration, and the agglomerated flocculant will affect its solubility, resulting in the inability to fully exert its flocculation effect; at the same time, the existing dosing equipment can only add flocculants to the sewage pool through a single output port. Due to the large area of ​​the sewage pool, it is difficult to carry out efficient flocculation operations on sewage far away from the dosing equipment, affecting the treatment efficiency of the sewage pool. Summary of the invention

[0004] The technical problems solved by this solution are:

[0005] (1) How to solve the problem that powdered flocculants are prone to agglomeration due to moisture, which will affect their solubility and make it impossible to fully exert their flocculation effect;

[0006] (2) How to solve the problem that the sewage pool is too large to be efficiently flocculated due to the large area of ​​the sewage pool and the sewage far away from the dosing equipment, thus affecting the treatment efficiency of the sewage pool.

[0007] The object of the present invention can be achieved by the following technical scheme: an automatic dosing device for a sewage treatment pool, comprising a shell, a feeding tool for quantitatively dosing flocculants is fixedly arranged on the top of the shell, the feeding tool is a prior art, a cavity is opened inside the shell, a drying mechanism for processing agglomerated flocculants is arranged in the middle of the cavity, and a feeding mechanism for uniform dosing is arranged at the bottom of the cavity on one side of the drying mechanism;

[0008] The drying mechanism includes a mixing box fixedly connected to the inner wall of the outer shell, the top of the mixing box is connected to a feed pipe, the input end of the feed pipe passes through the outer shell and is fixedly equipped with a funnel, the top position of the funnel corresponds to the output end position of the loading tooling, and a knocking unit is provided on one side of the mixing box to prevent the feed pipe from being blocked.

[0009] A further technical improvement of the present invention lies in that: a L-shaped exhaust pipe is connected to the top of the mixing box on one side of the feed pipe. The output end of the L-shaped exhaust pipe penetrates through the outer shell, and a filter screen is fixedly installed at the input end of the L-shaped exhaust pipe.

[0010] A further technical improvement of the present invention lies in that: a connecting pipe is connected to the bottom of the mixing box. A first control valve is fixedly installed in the middle of the connecting pipe. A water inlet pipe is connected to the side of the mixing box away from the knocking unit. The input end of the water inlet pipe is connected to an external water supply device. By turning on the hot air blower, at this time, the extending end of the hydraulic cylinder is at the longest, and the first piston is located below the output end of the hot air blower. The hot air flow blown out by the hot air blower enters the pressure increasing pipe. Since the rubber ball blocks the output end of the pressure increasing pipe, the hot air flow pushes the rubber ball to impact the feed pipe. Cooperating with the tension spring to pull the impact rod and the rubber ball to reset, the rubber ball provides continuous impact on the feed pipe. The generated vibration slowly shakes and disperses the agglomerated flocculant, preventing the agglomerated flocculant from blocking the inside of the feed pipe. At the same time, the hot air flow blown out from the pressure increasing pipe increases the temperature of the feed pipe, drying the flocculant attached to it, so as to facilitate shaking off the attached flocculant. The agglomerated flocculant that falls into the mixing box through the feed pipe is scattered due to the impact. Then, control the extending end of the hydraulic cylinder to contract to the shortest, so that the lever drives the turning lever to rotate, pushing the lifting rod and the first piston to rise. When the first piston blocks the input end of the pressure increasing pipe, the hot air flow will be injected into the mixing box along the hot air pipe, and then carry the moisture in the mixing box out through the L-shaped exhaust pipe, avoiding the excess moisture in the mixing box from affecting the subsequent dissolution effect of the flocculant.

[0011] A further technical improvement of the present invention lies in that: the knocking unit includes a hot air blower and a vertical pipe fixedly connected to the inner wall of the outer shell. The input end of the hot air blower penetrates through the outer shell, and the output end of the hot air blower is connected to the middle upper part of the side of the vertical pipe. The bottom of the side of the vertical pipe away from the hot air blower is connected to a hot air pipe. The output end of the hot air pipe is connected to the top of the mixing box.

[0012] A further technical improvement of the present invention lies in that: a pressure increasing pipe is connected to the side of the vertical pipe above the hot air pipe. An impact rod is rotatably arranged on the inner wall of the outer shell between the vertical pipe and the feed pipe. A rubber ball is fixedly installed at the top of the impact rod. The position of the rubber ball corresponds to the position of the output end of the pressure increasing pipe. The middle of the impact rod is fixedly connected to the vertical pipe through a tension spring.

[0013] A further technical improvement of the present invention lies in that: a first piston is slidably arranged on the inner wall of the vertical pipe. A lifting rod is fixedly connected to the bottom of the first piston. The bottom end of the lifting rod movably penetrates through the vertical pipe and is rotatably connected to a roller.

[0014] A further technical improvement of the present invention lies in that: the feeding mechanism includes a feed cylinder fixedly connected to the inner wall of the housing. The middle of the feed cylinder communicates with the output end of the connecting pipe. A square rod is movably inserted into the top of the feed cylinder. A second piston is fixedly installed at the bottom end of the square rod. The second piston is slidably connected to the inner wall of the feed cylinder and is located below the output end of the connecting pipe.

[0015] A further technical improvement of the present invention lies in that: a hydraulic cylinder is fixedly inserted into the top of the housing. The hydraulic cylinder is longitudinally arranged, and the extending end of the hydraulic cylinder is fixedly connected to the square rod. A lever is fixedly installed at the top of the square rod. A turning rod is rotatably arranged on the inner side wall of the housing. One end of the turning rod is in rolling connection with a roller.

[0016] A further technical improvement of the present invention lies in that: the middle of the turning rod is slidably connected to the lever and is located above the lever; by opening the first control valve and the second control valve, the flocculant liquid in the mixing tank is injected into the feed cylinder above the second piston. When the flocculant liquid reaches the threshold value, the second control valve is timely closed, and then the extending end of the hydraulic cylinder is slowly contracted to the shortest. During this process, when the height of the second piston is higher than the output end of the connecting pipe, the flocculant liquid in the mixing tank is discharged into the external sewage treatment pool through the blanking pipe. When the second piston continues to rise, the air pressure above the inner cavity of the feed cylinder is increased. When the extending end of the hydraulic cylinder is at the shortest, the second control valve is opened, so that the flocculant liquid in the feed cylinder is sprayed out through the spraying pipe and sprinkled into the external sewage treatment pool far away from the housing, cooperating with the flocculant liquid discharged into the external sewage treatment pool through the blanking pipe, ensuring the efficiency of the flocculant liquid in treating the sewage in the sewage pool.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] When the present invention is in use, by turning on the hot air blower, at this time, the extending end of the hydraulic cylinder is at the longest, and the first piston is located below the output end of the hot air blower. The hot air flow blown out by the hot air blower enters the pressurizing pipe. Since the rubber ball blocks the output end of the pressurizing pipe, the hot air flow pushes the rubber ball to impact the feed pipe. Cooperating with the tension spring to pull the impact rod and the rubber ball to reset, the rubber ball provides continuous impact on the feed pipe, and the generated vibration slowly shakes and disperses the agglomerated flocculant, preventing the agglomerated flocculant from blocking the inside of the feed pipe. At the same time, the hot air flow blown out from the pressurizing pipe increases the temperature of the feed pipe and dries the flocculant adhering to it, so as to facilitate the shaking off of the adhering flocculant. The agglomerated flocculant that falls into the mixing tank through the feed pipe is scattered due to the impact. Then, the extending end of the hydraulic cylinder is controlled to contract to the shortest, so that the lever drives the turning rod to rotate, pushing the lifting rod and the first piston to rise. When the first piston blocks the input end of the pressurizing pipe, the hot air flow will be injected into the mixing tank along the hot air pipe and then discharged through the L-shaped exhaust pipe together with the moisture in the mixing tank, avoiding the excess moisture in the mixing tank from affecting the subsequent dissolution effect of the flocculant.

[0019] When the present invention is in use, by opening the first control valve and the second control valve, the flocculant liquid in the mixing tank is injected into the feed cylinder above the second piston. When the flocculant liquid reaches the threshold value, the second control valve is promptly closed, and then the extending end of the hydraulic cylinder is slowly contracted to the shortest. During this process, when the height of the second piston is higher than the output end of the connecting pipe, the flocculant liquid in the mixing tank is discharged into the external sewage treatment tank through the blanking pipe. When the second piston continues to rise, the air pressure above the inner cavity of the feed cylinder is increased. When the extending end of the hydraulic cylinder is at the shortest, the second control valve is opened, so that the flocculant liquid in the feed cylinder is sprayed out through the spraying pipe and sprinkled onto the external sewage treatment tank far from the housing, cooperating with the flocculant liquid discharged into the external sewage treatment tank through the blanking pipe, ensuring the efficiency of the flocculant liquid in treating the sewage in the sewage tank. Brief Description of the Drawings

[0020] For the convenience of those skilled in the art to understand, the present invention will be further described below in conjunction with the drawings.

[0021] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a front-sectional view of the overall structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the drying mechanism of the present invention;

[0024] Figure 4 It is a three-dimensional schematic diagram of the structure of the knocking unit of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the feeding mechanism of the present invention;

[0026] Figure 6 It is a three-dimensional schematic diagram of a partial structure of the feeding mechanism of the present invention.

[0027] In the figure: 1, loading tooling; 2, box door; 3, blanking pipe; 4, spraying pipe; 5, housing; 6, funnel; 7, drying mechanism; 8, exhaust hole; 9, feeding mechanism; 10, hydraulic cylinder; 71, feed pipe; 72, L-shaped exhaust air pipe; 73, water inlet pipe; 74, mixing tank; 75, first control valve; 76, connecting pipe; 77, knocking unit; 78, hot air blower; 771, booster pipe; 772, rubber ball; 773, impact rod; 774, hot air pipe; 775, lifting rod; 776, roller; 777, vertical pipe; 91, turning rod; 92, feed cylinder; 93, second piston; 94, square rod; 95, lever. Detailed Embodiments

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1 - 6 As shown in the figure, an automatic chemical dosing device for a sewage treatment tank includes a housing 5. A feeding tooling 1 for quantitatively feeding flocculant is fixedly arranged at the top of the housing 5. The feeding tooling 1 is a prior art. A cavity is formed inside the housing 5. A drying mechanism 7 for treating caked flocculant is arranged in the middle of the cavity. A feeding mechanism 9 for evenly dosing is arranged at the bottom of the cavity on one side of the drying mechanism 7.

[0030] Please refer to Figure 2 and Figure 3 As shown in the figure, the above-mentioned drying mechanism 7 includes a mixing box 74 fixedly connected to the inner wall of the housing 5. A feed pipe 71 communicates with the top of the mixing box 74. The input end of the feed pipe 71 penetrates through the housing 5 and is fixedly installed with a funnel 6. The position of the top of the funnel 6 corresponds to the output end position of the feeding tooling 1. A knocking unit 77 for preventing the feed pipe 71 from being blocked is arranged on one side of the mixing box 74.

[0031] Please refer to Figure 2 and Figure 3 As shown in the figure, an L-shaped exhaust pipe 72 communicates with the top of the mixing box 74 on one side of the feed pipe 71. The output end of the L-shaped exhaust pipe 72 penetrates through the housing 5, and a filter screen is fixedly installed at the input end of the L-shaped exhaust pipe 72.

[0032] Please refer to Figure 2 and Figure 3As shown, a connecting pipe 76 is connected to the bottom of the above-mentioned mixing tank 74. A first control valve 75 is fixedly installed in the middle of the connecting pipe 76. A water inlet pipe 73 is connected to the side of the mixing tank 74 away from the knocking unit 77, and the input end of the water inlet pipe 73 is connected to an external water supply device. By turning on the hot air blower 78, at this time, the extending end of the hydraulic cylinder 10 is at the longest, and the first piston is located below the output end of the hot air blower 78. The hot air flow blown out by the hot air blower 78 enters the pressurizing pipe 771. Since the rubber ball 772 blocks the output end of the pressurizing pipe 771, the hot air flow pushes the rubber ball 772 to impact the feed pipe 71, and cooperates with the tension spring to pull the impact rod 773 and the rubber ball 772 back to their original positions, so that the rubber ball 772 provides continuous impact on the feed pipe 71. The generated vibration slowly shakes and breaks up the agglomerated flocculant, preventing the agglomerated flocculant from blocking the inside of the feed pipe 71. At the same time, the hot air flow blown out from the pressurizing pipe 771 raises the temperature of the feed pipe 71 and dries the flocculant attached to it, thus facilitating the shaking off of the attached flocculant. The agglomerated flocculant that falls into the mixing tank 74 through the feed pipe 71 is scattered due to the impact. Then, control the extending end of the hydraulic cylinder 10 to contract to the shortest, so that the lever 95 drives the turning rod 91 to rotate, pushing the lifting rod 775 and the first piston to rise. When the first piston blocks the input end of the pressurizing pipe 771, the hot air flow will be injected into the mixing tank 74 along the hot air pipe 774, and then carry the moisture in the mixing tank 74 out through the L-shaped exhaust pipe 72, avoiding the excess moisture in the mixing tank 74 from affecting the subsequent dissolution effect of the flocculant.

[0033] Please refer to Figure 3 and Figure 4 As shown, the above-mentioned knocking unit 77 includes a hot air blower 78 and a vertical pipe 777 fixedly connected to the inner wall of the housing 5. The input end of the hot air blower 78 penetrates through the housing 5, and the output end of the hot air blower 78 is connected to the middle upper part of the side of the vertical pipe 777. The bottom of the side of the vertical pipe 777 away from the hot air blower 78 is connected to a hot air pipe 774, and the output end of the hot air pipe 774 is connected to the top of the mixing tank 74.

[0034] Please refer to Figure 3 and Figure 4 As shown, a pressurizing pipe 771 is connected to the side of the vertical pipe 777 above the hot air pipe 774. An impact rod 773 is rotatably arranged on the inner wall of the housing 5 between the vertical pipe 777 and the feed pipe 71. A rubber ball 772 is fixedly installed at the top of the impact rod 773. The position of the rubber ball 772 corresponds to the position of the output end of the pressurizing pipe 771. The middle of the impact rod 773 is fixedly connected to the vertical pipe 777 through a tension spring.

[0035] Please refer to Figure 3 As shown, a first piston is slidably arranged on the inner wall of the vertical pipe 777. The bottom of the first piston is fixedly connected to a lifting rod 775. The bottom end of the lifting rod 775 movably penetrates through the vertical pipe 777 and is rotatably connected to a roller 776.

[0036] Please refer to Figure 2 and Figure 5 As shown, the above-mentioned feeding mechanism 9 includes a feed cylinder 92 fixedly connected to the inner wall of the housing 5. The output end of the connecting pipe 76 communicates with the middle of the feed cylinder 92. A square rod 94 is movably inserted into the top of the feed cylinder 92. A second piston 93 is fixedly installed at the bottom end of the square rod 94. The second piston 93 is slidably connected to the inner wall of the feed cylinder 92, and the second piston 93 is located below the output end of the connecting pipe 76.

[0037] Please refer to Figure 5 and Figure 6 As shown, a hydraulic cylinder 10 is fixedly inserted into the top of the above-mentioned housing 5. The hydraulic cylinder 10 is longitudinally arranged, and the extending end of the hydraulic cylinder 10 is fixedly connected to the square rod 94. A lever 95 is fixedly installed at the top of the square rod 94. A turning rod 91 is rotatably arranged on the inner side wall of the housing 5. One end of the turning rod 91 is in rolling connection with the roller 776.

[0038] Please refer to Figure 6 As shown, the middle part of the above-mentioned turning rod 91 is slidably connected to the lever 95, and the turning rod 91 is located above the lever 95; by opening the first control valve 75 and the second control valve, the flocculant liquid in the mixing tank 74 is injected into the feed cylinder 92 above the second piston 93. When the flocculant liquid reaches the threshold value, the second control valve is promptly closed, and then the extending end of the hydraulic cylinder 10 is controlled to slowly contract to the shortest. During this process, when the height of the second piston 93 is higher than the output end of the connecting pipe 76, the flocculant liquid in the mixing tank 74 is discharged into the external sewage treatment pool through the blanking pipe 3. When the second piston 93 continues to rise, the air pressure above the inner cavity of the feed cylinder 92 is increased. When the extending end of the hydraulic cylinder 10 is at the shortest, the second control valve is opened, so that the flocculant liquid in the feed cylinder 92 is sprayed out through the spraying pipe 4 and sprinkled onto the external sewage treatment pool far from the housing 5, cooperating with the flocculant liquid discharged into the external sewage treatment pool through the blanking pipe 3, ensuring the efficiency of the flocculant liquid in treating the sewage in the sewage pool.

[0039] Please refer to Figure 1 and Figure 5 As shown, the top of the side surface of the above-mentioned feed cylinder 92 is communicated with a spraying pipe 4. The output end of the spraying pipe 4 penetrates through the housing 5, and its output end is inclined upward. A second control valve is fixedly installed in the middle of the spraying pipe 4.

[0040] Please refer to Figure 1 and Figure 5 As shown, the bottom of the side surface of the above-mentioned feed cylinder 92 is communicated with a blanking pipe 3. The output end of the blanking pipe 3 penetrates through the housing 5 and extends into the external sewage treatment pool. The position of the input end of the blanking pipe 3 corresponds to the position of the second piston 93.

[0041] Please refer to Figure 2As shown, an exhaust hole 8 for discharging moisture and humid air is provided at the bottom of the back surface of the above-mentioned outer shell 5.

[0042] Please refer to Figure 1 As shown, a box door 2 is hinged to the front surface of the above-mentioned outer shell 5.

[0043] Working principle: When the present invention is in use, first, as Figure 1 and Figure 3 shown, a quantitative amount of flocculant is conveyed into the funnel 6 through the feeding tooling 1 and enters the mixing tank 74 along the feeding pipe 71. During this process, as Figure 3 and Figure 4 shown, the hot air blower 78 is turned on. At this time, the extending end of the hydraulic cylinder 10 is at its longest. Due to the influence of gravity, the roller 776 contacts the turning rod 91, and the first piston is located below the output end of the hot air blower 78, so that the hot air flow blown out by the hot air blower 78 enters the pressure boosting pipe 771. Since the rubber ball 772 blocks the output end of the pressure boosting pipe 771, the air pressure in the pressure boosting pipe 771 is increased, so that the hot air flow pushes the rubber ball 772 to impact the feeding pipe 71. Cooperating with the tension spring to pull the impact rod 773 and the rubber ball 772 to reset, the rubber ball 772 provides continuous impact on the feeding pipe 71, and the generated vibration slowly shakes and disperses the agglomerated flocculant, preventing the agglomerated flocculant from blocking the feeding pipe 71. At the same time, the hot air flow blown out from the pressure boosting pipe 771 increases the temperature of the feeding pipe 71 and dries the flocculant adhering to it, so as to facilitate the shaking off of the adhering flocculant. The agglomerated flocculant that falls into the mixing tank 74 through the feeding pipe 71 is dispersed due to the impact. At the same time, the hot air flow in the outer shell 5 will be discharged from the exhaust hole 8, which is convenient for discharging the moisture and humid air in the outer shell 5 and ensuring the dryness of the outer shell 5; as Figure 3 、 Figure 5 and Figure 6 shown, then control the extending end of the hydraulic cylinder 10 to contract to the shortest, so that the lever 95 drives the turning rod 91 to rotate, pushing the lifting rod 775 and the first piston to rise. When the first piston blocks the input end of the pressure boosting pipe 771, the hot air flow will be injected into the mixing tank 74 along the hot air pipe 774, and then carry the moisture in the mixing tank 74 and discharge it through the L-shaped exhaust pipe 72, avoiding the influence of excessive moisture in the mixing tank 74 on the subsequent dissolution effect of the flocculant; as Figure 3 and Figure 5 shown, a quantitative amount of clear water is injected into the mixing tank 74 through the water inlet pipe 73 by an external water supply device, which is convenient for the flocculant to be fully dissolved to obtain a flocculant solution. During the process of injecting clear water into the mixing tank 74, control the extending end of the hydraulic cylinder 10 to extend and reset to the longest; as Figure 5 and Figure 6As shown in the figure, by opening the first control valve 75 and the second control valve, the flocculant liquid in the mixing tank 74 is injected into the feed cylinder 92 above the second piston 93. When the flocculant liquid above the second piston 93 reaches the threshold value, the second control valve is promptly closed, and then the extending end of the hydraulic cylinder 10 is slowly contracted to the shortest. During this process, when the height of the second piston 93 is higher than the output end of the connecting pipe 76, the flocculant liquid in the mixing tank 74 is discharged into the external sewage treatment pool through the blanking pipe 3. When the second piston 93 continues to rise, the air pressure above the inner cavity of the feed cylinder 92 is increased. When the extending end of the hydraulic cylinder 10 is at the shortest, the second control valve is opened, so that the flocculant liquid in the feed cylinder 92 is sprayed out through the spraying pipe 4 and sprinkled into the external sewage treatment pool far away from the housing 5, cooperating with the flocculant liquid discharged into the external sewage treatment pool through the blanking pipe 3, ensuring the efficiency of the flocculant liquid in treating the sewage in the sewage pool.

[0044] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An automatic chemical dosing device for a sewage treatment tank, comprising a housing (5), wherein a feeding tooling (1) for quantitatively feeding a flocculant is fixedly arranged at the top of the housing (5), and is characterized in that: A cavity is formed inside the housing (5), and a drying mechanism (7) for treating caked flocculant is arranged in the middle of the cavity. A feeding mechanism (9) for uniformly dosing is arranged at the bottom of the cavity on one side of the drying mechanism (7). The drying mechanism (7) includes a mixing box (74) fixedly connected to the inner wall of the housing (5). A feed pipe (71) communicates with the top of the mixing box (74). A funnel (6) is fixedly installed at the input end of the feed pipe (71). The top position of the funnel (6) corresponds to the output end position of the feeding tooling (1). A knocking unit (77) for preventing the feed pipe (71) from being blocked is arranged on one side of the mixing box (74).

2. The automatic chemical dosing device for a sewage treatment tank according to claim 1, characterized in that, An L-shaped exhaust pipe (72) communicates with the top of the mixing box (74) on one side of the feed pipe (71). The output end of the L-shaped exhaust pipe (72) penetrates out of the housing (5), and a filter screen is fixedly installed at the input end of the L-shaped exhaust pipe (72).

3. The automatic chemical dosing device for a sewage treatment tank according to claim 1, characterized in that, A connecting pipe (76) communicates with the bottom of the mixing box (74). A first control valve (75) is fixedly installed in the middle of the connecting pipe (76). A water inlet pipe (73) communicates with the side of the mixing box (74) away from the knocking unit (77). The input end of the water inlet pipe (73) is communicated with an external water supply device.

4. An automatic chemical dosing device for a sewage treatment tank according to claim 1, characterized in that, The knocking unit (77) includes a hot air blower (78) and a vertical pipe (777) fixedly connected to the inner wall of the housing (5). The output end of the hot air blower (78) communicates with the middle upper part of the side of the vertical pipe (777). A hot air pipe (774) communicates with the bottom of the side of the vertical pipe (777) away from the hot air blower (78). The output end of the hot air pipe (774) communicates with the top of the mixing box (74).

5. An automatic chemical dosing device for a sewage treatment tank according to claim 4, characterized in that, A pressure boosting pipe (771) communicates with the side of the vertical pipe (777) above the hot air pipe (774). An impact rod (773) is rotatably arranged on the inner wall of the housing (5) between the vertical pipe (777) and the feed pipe (71). A rubber ball (772) is fixedly installed at the top of the impact rod (773). The position of the rubber ball (772) corresponds to the output end position of the pressure boosting pipe (771). The middle part of the impact rod (773) is fixedly connected to the vertical pipe (777) through a tension spring.

6. The automatic chemical dosing device for a sewage treatment tank according to claim 4, characterized in that, A first piston is slidably arranged on the inner wall of the vertical pipe (777). A lifting rod (775) is fixedly connected to the bottom of the first piston. The bottom end of the lifting rod (775) movably penetrates through the vertical pipe (777) and is rotatably connected with a roller (776).

7. The automatic chemical dosing device for a sewage treatment tank according to claim 1, characterized in that The feeding mechanism (9) includes a feeding cylinder (92) fixedly connected to the inner wall of the housing (5). The middle of the feeding cylinder (92) communicates with the output end of the connecting pipe (76). A square rod (94) is movably inserted into the top of the feeding cylinder (92). A second piston (93) is fixedly installed at the bottom end of the square rod (94). The second piston (93) is slidably connected to the inner wall of the feeding cylinder (92), and the second piston (93) is located below the output end of the connecting pipe (76).

8. An automatic chemical dosing device for a sewage treatment tank according to claim 7, characterized in that, A hydraulic cylinder (10) is fixedly inserted at the top of the housing (5). The extending end of the hydraulic cylinder (10) is fixedly connected to a square rod (94). A lever (95) is fixedly installed at the top of the square rod (94). A turning rod (91) is rotatably arranged on the inner side wall of the housing (5). One end of the turning rod (91) is in rolling connection with a roller (776).

9. The automatic chemical dosing device for a sewage treatment tank according to claim 8, characterized in that, The middle part of the turning rod (91) is in sliding connection with the lever (95), and the turning rod (91) is located above the lever (95).

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