CN217163439U

CN217163439U - Sewage treatment device

Info

Publication number: CN217163439U
Application number: CN202220951304.6U
Authority: CN
Inventors: 夏守俊; 杨辉
Original assignee: Jiangsu Huaxia Water Supply And Drainage Technology Co ltd
Current assignee: Jiangsu Huaxia Water Supply And Drainage Technology Co ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-08-12
Anticipated expiration: 2032-04-24

Abstract

The utility model discloses a sewage treatment device, which comprises a water treatment box body, wherein the upper part of the water treatment box body is provided with a sewage inlet pipe and a purified water outlet pipe; the partition plate divides the inner part of the water treatment tank body into a water purification cavity and a filter cavity which are distributed up and down, and the filter cavity is communicated with the sewage outlet pipe; the water purifying cavity is communicated with a water inlet of the electric water pump through a water purifying outlet pipe; a sewage tank is arranged in the water purifying cavity, and the bottom of the sewage tank is communicated with the filtering cavity through a connecting pipe; a pipe cover is arranged in the filter cavity, and the top of the pipe cover is connected with the bottom of the piston through a first connecting rod; the top of the piston is fixedly connected with the lower end of the second connecting rod; the upper end of the second connecting rod penetrates through the connecting pipe to be connected with the linkage type floating ball liquid level mechanism. The utility model discloses not only can carry out sewage filtration and recycle, can carry out back flush work automatically moreover.

Description

Sewage treatment device

Technical Field

The utility model relates to a water treatment device, more specifically say, relate to a sewage treatment plant.

Background

The treatment of solid and suspended matters in sewage is widely applied to fresh water recycling systems, municipal sewage treatment systems and substance recycling systems in industrial and agricultural production. At present, the environmental pollution of natural waters is more and more serious, and available fresh water resources are less and less. With the environmental importance and the improvement of legislative system in China, the method takes restriction measures for industrial and agricultural production and the discharge of urban sewage, establishes corresponding discharge standards, and is widely applied to various aspects of social life and production.

Disclosure of Invention

1. Technical problem to be solved by the utility model

An object of the utility model is to provide a sewage treatment device, adopt the utility model discloses a technical scheme, simple structure, it is convenient to connect, not only can carry out sewage filtration and recycle, can carry out back flush work automatically moreover, can also be according to the switch of the electronic suction pump of big or small automatic control of sewage treatment volume, also can be according to the speed of the electronic suction pump pumping speed of big or small automatic control of sewage treatment volume.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a sewage treatment device, which comprises a water treatment box body, wherein the upper part of the water treatment box body is provided with a sewage inlet pipe and a purified water outlet pipe, the bottom of the water treatment box body is provided with the sewage outlet pipe, the inside of the water treatment box body is horizontally provided with a partition plate, and the partition plate is provided with a first filter screen; the partition plate divides the interior of the water treatment tank body into a water purification cavity and a filter cavity which are distributed up and down, wherein the filter cavity is communicated with the sewage outlet pipe; the water purifying cavity is communicated with a water inlet of the electric water pump through the water purifying outlet pipe; a sewage tank is arranged in the purified water cavity, and the bottom of the sewage tank is communicated with the filter cavity through a connecting pipe; a pipe cover used for covering the sewage outlet pipe is arranged in the filter cavity, and the top of the pipe cover is connected with the bottom of a piston used for plugging a connecting pipe through a first connecting rod; the top of the piston is fixedly connected with the lower end of the second connecting rod; the upper end of the second connecting rod penetrates through the connecting pipe to be connected with the linkage type floating ball liquid level mechanism, and the linkage type floating ball liquid level mechanism is used for controlling the connecting pipe to be closed and the sewage outlet pipe to be opened or controlling the connecting pipe to be opened and the sewage outlet pipe to be closed.

Furthermore, the linkage type floating ball liquid level mechanism comprises a vertical strip seam arranged on a side plate of the sewage tank, a first floating ball positioned in the sewage tank and a second floating ball positioned in the water purification cavity, the left side part of the first floating ball is fixedly connected with one end of a third connecting rod, and the other end of the third connecting rod is hinged in the sewage tank; the middle part of the third connecting rod is hinged with the upper end of the fourth connecting rod; the lower end of the fourth connecting rod is hinged with the upper end of the second connecting rod;

the right side part of the second floating ball is fixedly connected with one end of a sixth connecting rod, and the other end of the sixth connecting rod is hinged in the water purifying cavity; the left side part of the second floating ball is fixedly connected with one end of a third linkage rod, and the other end of the third linkage rod is connected with one end of the first linkage rod; the other end of the first linkage rod is provided with a strip-shaped sliding chute arranged along the length direction of the first linkage rod;

a second linkage rod capable of sliding along the height direction of the vertical strip seam penetrates through the vertical strip seam, and a sliding rod fixed at one end of the second linkage rod can be slidably arranged in the strip-shaped sliding groove in a penetrating manner; the other end of the second linkage rod penetrates through a second filter screen and then is fixed to the right side portion of the first floating ball, and the second filter screen can cover the vertical strip seam in a vertically moving mode.

Furthermore, the electric water pump is electrically connected with the motor touch switch; the motor touch switch is fixed on the top plate of the water treatment tank body through a bracket; a touch rod is arranged below the motor touch switch and can be vertically and slidably arranged on a top plate of the water treatment tank body in a penetrating manner; the lower end of the touch rod is hinged with the upper end of a fifth connecting rod, and the lower end of the fifth connecting rod is hinged with the middle part of the sixth connecting rod.

Furthermore, a spring used for abutting against a motor touch switch is fixedly arranged at the top of the touch rod; a rack is machined on the side surface of the touch rod and meshed with the gear; the gear is rotatably arranged on the bracket through a supporting shaft; one end of the supporting shaft is fixedly connected with a knob end of a frequency modulation knob fixedly arranged on the bracket; the frequency modulation knob is electrically connected with the electric water pump.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

(1) the utility model relates to a sewage treatment device, when a connecting pipe is opened and a sewage outlet pipe is closed, the sewage is normally treated, namely, the sewage enters a sewage tank through a sewage inlet pipe, because the connecting pipe is opened and the sewage outlet pipe is closed, the sewage enters a filtering cavity through the connecting pipe, and because a first filter screen is arranged on a separation plate between a clean water cavity and the filtering cavity, impurities in the sewage can be blocked by the first filter screen, the filtered water can enter the clean water cavity, then an electric water pump can be controlled to work to pump the water in the clean water cavity for reuse, when the connecting pipe is closed and the sewage outlet pipe is opened, the water in the sewage tank can not enter the filtering cavity, and the water in the clean water cavity and the filtering cavity is directly discharged from the sewage outlet pipe, namely, the water in the clean water cavity can recoil the first filter screen and the filtering cavity, the sewage is discharged from the sewage outlet pipe after the first filter screen and the filtering cavity are cleaned, not only can the sewage be filtered and reused, but also the back washing work can be automatically carried out;

(2) the linkage type floating ball liquid level mechanism of the sewage treatment device has simple structure and convenient connection, can control the connection pipe to be closed and the sewage outlet pipe to be opened, namely can automatically perform back washing work when the first filter screen is blocked, can control the connection pipe to be closed and the sewage outlet pipe to be opened, namely can automatically reset so as to continue water treatment work;

(3) the utility model relates to a sewage treatment device, an electric water pump of which is electrically connected with a motor touch switch, the motor touch switch is controlled by a second floating ball in a linkage floating ball liquid level mechanism, a touch rod is arranged below the motor touch switch, and the touch rod can be penetrated on a top plate of a water treatment box body in a vertical sliding way; the lower end of the touch rod is hinged with the upper end of a fifth connecting rod, the lower end of the fifth connecting rod is hinged with the middle part of a sixth connecting rod, namely when the second floating ball reaches a certain position along with the liquid level in the water purification cavity, the touch rod is driven to rise to the certain position, the motor touch switch is pressed by the touch rod at the moment, and the electric water pump works to pump water;

(4) the utility model relates to a sewage treatment device, a frequency modulation knob is electrically connected with an electric water pump, the frequency modulation knob is controlled by a second floating ball in a linkage floating ball liquid level mechanism, a rack is fixedly arranged on the side surface of a touch rod, and the rack is meshed with a gear; the gear is rotatably arranged on the bracket through a supporting shaft; one end of the supporting shaft is fixedly connected with the knob end of the frequency modulation knob fixedly arranged on the support, namely, when the second floating ball rises along with the liquid level in the water purification cavity, the second floating ball can drive the touch rod to rise, the touch rod rises to drive the gear to rotate, and then the knob end of the frequency modulation knob is driven to rotate, so that the pumping speed of the electric water pump is increased.

Drawings

FIG. 1 is a schematic structural view of a sewage treatment apparatus of the present invention;

FIG. 2 is a three-dimensional view of the interior of a sewage treatment plant of the present invention;

fig. 3 is a sectional view of the sewage treatment device of the present invention.

The reference numerals in the schematic drawings illustrate: 1. a water treatment tank body; 2. a sewage inlet pipe; 3. a purified water outlet pipe; 4. a sewage outlet pipe; 5. a partition plate; 6. a first filter screen; 7. a sewage tank; 7-1, vertical bar seam; 8. a connecting pipe; 9. a tube cover; 10. a first link; 11. A piston; 12. a second link; 13. a first floating ball; 14. a second floating ball; 15. a third link; 16. a fourth link; 17. A first linkage rod; 17-1, a strip-shaped chute; 18. a second linkage rod; 19. a slide bar; 20. a second filter screen; 21. a motor touches a switch; 22. a touch rod is touched; 23. a fifth link; 24. a touch block; 25. a gear; 26. a support shaft; 27. a frequency modulation knob; 28. a support; 29. a spring; 30. a limiting plate; 31. a sixth link; 32. a third link rod.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Examples

With reference to fig. 2 and 3, the sewage treatment apparatus of the present embodiment includes a water treatment tank 1, a sewage inlet pipe 2 and a purified water outlet pipe 3 are disposed at an upper portion of the water treatment tank 1, a sewage outlet pipe 4 is disposed at a bottom of the water treatment tank 1, a partition plate 5 is horizontally disposed inside the water treatment tank 1, wherein a first filter screen 6 is disposed on the partition plate 5; the division plate 5 divides the interior of the water treatment tank body 1 into a purified water cavity and a filter cavity which are distributed up and down, wherein the filter cavity is communicated with the sewage outlet pipe 4; the water purifying cavity is communicated with a water inlet of the electric water pump through a water purifying outlet pipe 3; a sewage tank 7 is arranged in the purified water cavity, and the bottom of the sewage tank 7 is communicated with the filter cavity through a connecting pipe 8; a pipe cover 9 used for covering the sewage outlet pipe is arranged in the filter cavity, a first grid support frame is arranged in the sewage outlet pipe for the pipe cover 9 to move up and down stably, a seventh connecting rod is fixedly connected to the bottom of the pipe cover 9, the lower end of the seventh connecting rod can penetrate through a central through hole of the first grid support frame in a vertical movement mode, and the first grid support frame can be in a cross shape or a rice shape; the top of the pipe cover 9 is connected with the bottom of a piston 11 used for plugging a connecting pipe through a first connecting rod 10, a second grid supporting frame is arranged in the connecting pipe 8 for the purpose of stable up-and-down movement of the piston 11, the first connecting rod 10 can penetrate through a central through hole of the second grid supporting frame in a vertically movable manner, and the second grid supporting frame can be in a cross shape or a rice shape; the top of the piston 11 is fixedly connected with the lower end of the second connecting rod 12; the upper end of the second connecting rod 12 penetrates through the connecting pipe 8 to be connected with the linkage type floating ball liquid level mechanism, and the linkage type floating ball liquid level mechanism is used for controlling the connecting pipe 8 to be closed and the sewage outlet pipe 4 to be opened or controlling the connecting pipe 8 to be opened and the sewage outlet pipe 4 to be closed; when the connecting pipe is opened and the sewage outlet pipe is closed, normal sewage treatment is carried out, namely sewage enters the sewage tank through the sewage inlet pipe, the sewage enters the filtering cavity through the connecting pipe because the connecting pipe is opened and the sewage outlet pipe is closed, and impurities in the sewage are blocked by the first filter screen because the first filter screen is arranged on the partition plate between the clean water cavity and the filtering cavity, and the filtered water enters the clean water cavity and can be controlled to work to pump the water in the clean water cavity for reuse, when the connecting pipe is closed and the sewage outlet pipe is opened, the water in the sewage tank cannot enter the filtering cavity, the water in the clean water cavity and the filtering cavity is directly discharged from the sewage outlet pipe, namely, the water in the clean water cavity can backflush the first filter screen and the filtering cavity, the sewage is discharged from the sewage outlet pipe after the first filter screen and the filtering cavity are cleaned, so that the sewage can be filtered and reused, but also can automatically carry out the back washing work.

Continuing to the figures 2 and 3, the linkage type floating ball liquid level mechanism comprises a vertical strip seam 7-1 arranged on a side plate of the sewage tank 7, a first floating ball 13 positioned in the sewage tank 7 and a second floating ball 14 positioned in the water purification cavity, wherein the left side part of the first floating ball 13 is fixedly connected with one end of a third connecting rod 15, and the other end of the third connecting rod 15 is hinged in the sewage tank 7; the middle part of the third connecting rod 15 is hinged with the upper end of the fourth connecting rod 16; the lower end of the fourth connecting rod 16 is hinged with the upper end of the second connecting rod 12;

the right side part of the second floating ball 14 is fixedly connected with one end of a sixth connecting rod 31, and the other end of the sixth connecting rod 31 is hinged in the water purifying cavity; the left side part of the second floating ball 14 is fixedly connected with one end of a third linkage rod 32, and the other end of the third linkage rod 32 is connected with one end of a first linkage rod 17; the other end of the first linkage rod 17 is provided with a strip-shaped sliding groove 17-1 arranged along the length direction of the first linkage rod; a second linkage rod 18 which can slide along the height direction of the vertical slot 7-1 is arranged in the vertical slot 7-1 in a penetrating way, and the water quantity of sewage entering the water purifying cavity through the vertical slot 7-1 is required to be negligible; a sliding rod 19 fixed at one end of the second linkage rod 18 is slidably arranged in the strip-shaped chute 17-1 in a penetrating way; the other end of the second linkage rod 18 passes through the second filter screen 20 and then is fixed on the right side part of the first floating ball 13, wherein the second filter screen 20 can cover the vertical slot 7-1 in a vertically movable manner, in order to ensure that the second filter screen 20 moves up and down more stably, the limiting plates 30 with the L-shaped cross section are fixedly arranged on the inner wall of the side plate of the sewage tank 7 and positioned on the two sides of the vertical slot 7-1, and the second filter screen 20 is arranged in the guide groove formed between the two limiting plates 30 in a vertically movable manner.

The linkage type floating ball liquid level mechanism is simple in structure and convenient to connect, when normal sewage is treated, sewage enters the sewage tank 7 through the sewage inlet pipe 2 and enters the filter cavity through the connecting pipe 8, and then enters the water purification cavity through the first filter screen 6, the liquid level in the water purification cavity rises to drive the second floating ball 14 to rise along with the increase of the treated sewage, and the sliding rod 19 fixed at one end of the second linkage rod 18 slidably penetrates through the strip-shaped sliding groove 17-1, so that the first floating ball 13 cannot be driven to rise when the second floating ball 14 rises, the liquid level in the water purification cavity continues to rise to drive the second floating ball 14 to continue to rise until the second floating ball reaches a certain position, and the electric water pump is controlled to work to pump water; when the first filter screen 6 is blocked, sewage is continuously treated, that is, sewage continuously enters the sewage tank 7 through the sewage inlet pipe 2, so that the liquid level in the sewage tank 7 rises, the rising of the liquid level in the sewage tank 7 drives the first floating ball 13 to rise, the pipe cover and the piston are driven to rise together through the fourth connecting rod 16 and the second connecting rod 12, the sliding rod 19 fixed at one end of the second connecting rod 18 slidably penetrates through the strip-shaped sliding groove 17-1, so that the second floating ball 14 cannot be driven to rise when the first floating ball 13 rises, the liquid level in the sewage tank 7 continuously rises to drive the first floating ball 13 to continue to rise, when the connecting pipe is blocked by the piston and the sewage outlet pipe is opened, water in the water purifying chamber backflushs the first filter screen 6 and the filter chamber, dirt is discharged from the sewage outlet pipe, automatic backflush work is completed, and when all water in the water purifying chamber and the filter chamber is completely discharged, the second floating ball 14 can automatically fall, and at the moment, the second floating ball 14 can pull the first floating ball 13 to fall through the first linkage rod and the second linkage rod, namely, the pipe cover and the piston are driven to fall together, so that the piston is separated from the connecting pipe, the pipe cover covers the sewage outlet pipe, and the pipe is bent to automatically reset so as to continue water treatment; in addition, when the water in the water purifying cavity is too large to be discharged and the liquid level in the sewage tank rises, the connecting pipe is plugged by the piston, and the sewage outlet pipe is opened to discharge all the water in the water purifying cavity and the water in the filtering cavity, so that the work similar to automatic flood discharge is carried out, and the sewage treatment can be carried out continuously.

In order to automatically control the switch of the electric water pump according to the sewage treatment capacity, referring to fig. 1 and 3, the electric water pump is electrically connected with a motor touch switch 21; the motor touch switch 21 is fixed on the top plate of the water treatment tank body 1 through a support, wherein the support comprises a middle vertical plate, the lower end of the middle vertical plate is fixedly arranged on the top plate of the water treatment tank body 1, and the upper end of the middle vertical plate is fixedly provided with a transverse plate vertical to the middle vertical plate; the motor touch switch 21 is fixedly arranged on the lower surface of the transverse plate; a touch rod 22 is arranged below the motor touch switch 21, the touch rod 22 can be penetrated on the top plate of the water treatment tank body 1 in a vertical sliding manner, and in order to ensure that the vertical movement is more stable, a linear bearing is fixedly arranged on the top plate of the water treatment tank body 1 and is sleeved outside the touch rod 22; the lower end of the touch rod 22 is hinged with the upper end of the fifth connecting rod 23, and the lower end of the fifth connecting rod 23 is hinged with the middle part of the sixth connecting rod 31.

When the second floating ball rises along with the liquid level in the water purification cavity, the touch rod 22 is driven to move upwards through the sixth connecting rod 31 and the fifth connecting rod 23, when the second floating ball continues to rise along with the liquid level in the water purification cavity until the touch rod 22 abuts against the motor touch switch 21, the electric water pump is turned on to pump water, and when the second floating ball descends, the touch rod 22 also descends to be separated from the motor touch switch 21, and at the moment, the electric water pump is turned off to stop pumping water.

In order to automatically control the pumping speed of the electric water pump according to the sewage treatment capacity, referring to fig. 1 and 3, a spring 29 for abutting against a motor trigger switch 21 is fixedly arranged at the top of a trigger rod 22, wherein a trigger block 24 is fixedly arranged at the top of the spring 29; a rack is processed on the side surface of the touch rod 22 and meshed with the gear 25; the gear 25 is rotatably mounted on a support 28 through a support shaft 26, specifically, the support further comprises a front vertical plate and a rear vertical plate which are positioned at the front side and the rear side of the middle vertical plate, one end of the support shaft 26 is rotatably supported on the front vertical plate, and the other end of the support shaft 26 is rotatably supported on the middle vertical plate; one end of the supporting shaft 26 is fixedly connected with a knob end of a frequency modulation knob 27 fixedly arranged on the support 28, specifically, the frequency modulation knob 27 is fixed on the rear vertical plate, and the knob end of the frequency modulation knob 27 is in transmission connection with one end of the supporting shaft 26 through a coupler; the frequency modulation knob 27 is electrically connected with the electric water pump.

When the second floating ball rises along with the liquid level in the water purification cavity, the touch rod 22 is driven to move upwards through the sixth connecting rod 31 and the fifth connecting rod 23, and the rack is meshed with the gear 25, so that the touch rod 22 rises to drive the supporting shaft to rotate, and further, the knob end of the frequency modulation knob 27 is driven to rotate; when the second floating ball continuously rises along with the liquid level in the water purification cavity until the spring 29 at the top of the touch rod 22 abuts against the motor touch switch 21, the electric water pump is turned on to work at the moment, water is pumped according to the twisting result of the knob end of the frequency modulation knob 27, when the electric water pump pumps water, the liquid level in the water purification cavity continuously rises, at the moment, the spring 29 is compressed to enable the state abutting against the motor touch switch 21 to be kept, the support shaft is driven to rotate, namely the knob end of the frequency modulation knob 27 is twisted, and the water pumping speed of the electric water pump is increased.

The utility model discloses a sewage treatment device, simple structure, it is convenient to connect, not only can carry out sewage filtration and recycle, can carry out back flush work automatically moreover, can be according to the switch of the electronic suction pump of big or small automatic control of sewage treatment volume in addition, also can be according to the speed of the electronic suction pump pumping speed of big or small automatic control of sewage treatment volume.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A sewage treatment device is characterized in that: the device comprises a water treatment tank body (1), wherein a sewage inlet pipe (2) and a purified water outlet pipe (3) are arranged at the upper part of the water treatment tank body (1), a sewage outlet pipe (4) is arranged at the bottom of the water treatment tank body (1), a partition plate (5) is horizontally arranged in the water treatment tank body (1), and a first filter screen (6) is arranged on the partition plate (5); the partition plate (5) divides the interior of the water treatment tank body (1) into a water purification cavity and a filter cavity which are distributed up and down, wherein the filter cavity is communicated with the sewage outlet pipe (4); the water purifying cavity is communicated with a water inlet of the electric water pump through the water purifying outlet pipe (3); a sewage tank (7) is arranged in the purified water cavity, and the bottom of the sewage tank (7) is communicated with the filter cavity through a connecting pipe (8); a pipe cover (9) used for covering the sewage outlet pipe is arranged in the filter cavity, and the top of the pipe cover (9) is connected with the bottom of a piston (11) used for plugging a connecting pipe through a first connecting rod (10); the top of the piston (11) is fixedly connected with the lower end of the second connecting rod (12); the upper end of the second connecting rod (12) penetrates through the connecting pipe (8) to be connected with the linkage type floating ball liquid level mechanism, and the linkage type floating ball liquid level mechanism is used for controlling the connecting pipe (8) to be closed and the sewage outlet pipe (4) to be opened or controlling the connecting pipe (8) to be opened and the sewage outlet pipe (4) to be closed.

2. The sewage treatment apparatus according to claim 1, wherein: the linkage type floating ball liquid level mechanism comprises a vertical strip seam (7-1) arranged on a side plate of the sewage tank (7), a first floating ball (13) positioned in the sewage tank (7) and a second floating ball (14) positioned in the water purification cavity, the left side part of the first floating ball (13) is fixedly connected with one end of a third connecting rod (15), and the other end of the third connecting rod (15) is hinged in the sewage tank (7); the middle part of the third connecting rod (15) is hinged with the upper end of the fourth connecting rod (16); the lower end of the fourth connecting rod (16) is hinged with the upper end of the second connecting rod (12);

the right side part of the second floating ball (14) is fixedly connected with one end of a sixth connecting rod (31), and the other end of the sixth connecting rod (31) is hinged in the water purifying cavity; the left side part of the second floating ball (14) is fixedly connected with one end of a third linkage rod (32), and the other end of the third linkage rod (32) is connected with one end of a first linkage rod (17); the other end of the first linkage rod (17) is provided with a strip-shaped sliding groove (17-1) arranged along the length direction of the first linkage rod;

a second linkage rod (18) capable of sliding along the height direction of the vertical strip seam (7-1) is arranged in the vertical strip seam in a penetrating mode, and a sliding rod (19) fixed at one end of the second linkage rod (18) is arranged in the strip sliding groove (17-1) in a penetrating mode; the other end of the second linkage rod (18) penetrates through a second filter screen (20) and then is fixed to the right side of the first floating ball (13), and the second filter screen (20) can cover the vertical strip seam (7-1) in a vertically movable mode.

3. The sewage treatment apparatus according to claim 2, wherein: the electric water pump is electrically connected with a motor touch switch (21); the motor touch switch (21) is fixed on a top plate of the water treatment tank body (1) through a bracket; a touch rod (22) is arranged below the motor touch switch (21), and the touch rod (22) can be vertically and slidably arranged on a top plate of the water treatment tank body (1) in a penetrating manner; the lower end of the touch rod (22) is hinged with the upper end of a fifth connecting rod (23), and the lower end of the fifth connecting rod (23) is hinged to the middle of the sixth connecting rod (31).

4. A wastewater treatment plant according to claim 3, characterized in that: the top of the touch rod (22) is fixedly provided with a spring (29) which is used for abutting against the motor touch switch (21); a rack is processed on the side surface of the touch rod (22), and the rack (24) is meshed with a gear (25); the gear (25) is rotatably mounted on the bracket (28) through a support shaft (26); one end of the supporting shaft (26) is fixedly connected with the knob end of the frequency modulation knob (27) fixedly arranged on the bracket (28); and the frequency modulation knob (27) is electrically connected with the electric water pump.