Electric control device for sewage pump of wastewater sedimentation tank of rolling mill

Abstract

The utility model discloses an electric control device for a sewage pump of a wastewater sedimentation tank of a rolling mill, which belongs to the technical field of sewage treatment and comprises a sedimentation tank body, a side-mounted float switch mounted on the side wall of the sedimentation tank body and a sewage discharge pipeline communicated and connected with the sedimentation tank body. The inner side of the sedimentation tank body is divided into a dirty water storage cavity and a purified water storage cavity, an ultrasonic liquid level meter is installed above the purified water storage cavity, a control box is installed on the outer side of the sedimentation tank body, a multifunctional digital instrument is installed on the surface of the control box, and a horizontal pump is installed at the root of the outer side of the sedimentation tank body. A branch pipeline is connected between the output end of the horizontal pump and the blow-off pipeline in a communicating mode, a pressure switch is installed between the branch pipeline and the control end of the control box, underground blow-off can be effectively guaranteed, manual intervention is extremely small, the service life of the blow-off pipeline is prolonged, and the pipeline dredging cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and more specifically, to an electric control device for a sewage pump in a waste water sedimentation tank of a rolling mill. Background Technique

[0002] Steel is often called ferrous metal, which can be divided into pig (cast) iron, wrought iron and steel. Due to different production processes, the sources and properties of waste water are also different. From the perspective of sources, there are waste water from ironmaking workshops, steelmaking workshops and rolling workshops. From the perspective of use, there are mainly two categories: indirect cooling waste water and washing waste water. The treatment of steel waste water focuses on improving the reuse of water resources and takes a series of water-saving and water-treatment measures.

[0003] The existing sewage discharge control of sedimentation tanks usually consists of a submersible pump and a float type liquid level switch, with poor reliability. It often fails to discharge sewage smoothly due to blocked pump suction ports, failed float type liquid level gauges, or blocked pipelines, resulting in sewage overflow, wasting a large amount of labor costs. Therefore, we propose an electric control device for a sewage pump in a waste water sedimentation tank of a rolling mill to solve the above existing problems. Content of the Utility Model

[0004] 1. Technical Problems to be Solved

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide an electric control device for a sewage pump in a waste water sedimentation tank of a rolling mill, which can effectively ensure underground sewage discharge, with very little manual intervention, extend the service life of sewage discharge pipelines, and save pipeline dredging costs.

[0006] 2. Technical Solutions

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] The electric control device for a sewage pump in a waste water sedimentation tank of a rolling mill includes a sedimentation tank body, a side-mounted float switch installed on the side wall of the sedimentation tank body, and a sewage discharge pipeline conductively connected to the sedimentation tank body. The inside of the sedimentation tank body is divided into a dirty water storage cavity and a clean water storage cavity;

[0009] An ultrasonic liquid level gauge is installed above the clean water storage cavity;

[0010] A control box is installed outside the sedimentation tank body, and a multi-functional digital meter is installed on the surface of the control box;

[0011] A horizontal pump is installed at the outer root of the sedimentation tank body. A branch pipeline is conductively connected between the output end of the horizontal pump and the sewage discharge pipeline, and a pressure switch is installed between the branch pipeline and the control end of the control box;

[0012] A motor alarm is installed on the side wall of the control box;

[0013] A straight-through valve is installed between the sewage discharge pipe and the control end of the control box;

[0014] A sewage discharge branch pipe is provided between the sewage discharge pipe and the dirty water storage cavity, and an inlet valve is installed between the sewage discharge branch pipe and the control end of the control box.

[0015] Furthermore, an underground sewage pit is excavated below the sedimentation tank body;

[0016] A vertical pump is installed at the top edge of the underground sewage pit. A dirty water outlet pipe is installed between the output end of the vertical pump and the underground sewage pit, and a dirty water inlet pipe is conductively connected between the input end of the vertical pump and the sewage discharge pipe.

[0017] Furthermore, an emptying pipe is conductively connected to the root of the dirty water storage cavity, and an emptying valve is installed at the emptying pipe.

[0018] Furthermore, the triggering end of the side-mounted float switch is located inside the clean water storage cavity.

[0019] Furthermore, a pipeline is conductively connected between the input end of the horizontal pump and the root of the clean water storage cavity.

[0020] Furthermore, both the straight-through valve and the inlet valve are electromagnetic control valves.

[0021] Furthermore, the ultrasonic level gauge, the side-mounted float switch, the multi-functional digital meter, the pressure switch, the motor alarm, the horizontal pump, the straight-through valve, the inlet valve, and the vertical pump are all electrically connected to the control box.

[0022] 3. Beneficial effects

[0023] Compared with the prior art, the advantages of the present utility model are as follows:

[0024] It effectively ensures underground sewage discharge, requires very little manual intervention, extends the service life of the sewage discharge pipe, and saves the cost of pipe dredging. Brief description of the drawings

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0026] Figure 2 It is a structural schematic diagram of the sedimentation tank body of the present utility model;

[0027] Figure 3 It is a structural schematic diagram of the underground sewage pit of the present utility model.

[0028] Description of the reference numerals in the drawings:

[0029] 1. Sedimentation tank body; 2. Ultrasonic level gauge; 3. Side-mounted float switch; 4. Sewage discharge pipe; 5. Multifunctional digital meter; 6. Pressure switch; 7. Motor alarm; 8. Horizontal pump; 9. Control box; 10. Straight-through valve; 11. Water inlet valve; 12. Underground sewage pit; 13. Vertical pump; 14. Drain valve. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0031] Embodiment:

[0032] Please refer to Figures 1-3 , the electric control device of the sewage pump for the rolling mill wastewater sedimentation tank, including the sedimentation tank body 1, the side-mounted float switch 3 installed on the side wall of the sedimentation tank body 1, and the sewage discharge pipe 4 that is conductively connected to the sedimentation tank body 1. The inner side of the sedimentation tank body 1 is divided into a dirty water storage cavity and a clean water storage cavity;

[0033] An ultrasonic level gauge 2 is installed above the clean water storage cavity;

[0034] A control box 9 is installed on the outer side of the sedimentation tank body 1, and a multifunctional digital meter 5 is installed on the surface of the control box 9;

[0035] A horizontal pump 8 is installed at the outer root of the sedimentation tank body 1. A branch pipe is conductively connected between the output end of the horizontal pump 8 and the sewage discharge pipe 4, and a pressure switch 6 is installed between the branch pipe and the control end of the control box 9;

[0036] A motor alarm 7 is installed on the side wall of the control box 9;

[0037] A straight-through valve 10 is installed between the sewage discharge pipe 4 and the control end of the control box 9;

[0038] A sewage discharge branch pipe is provided between the sewage discharge pipe 4 and the dirty water storage cavity, and a water inlet valve 11 is installed between the sewage discharge branch pipe and the control end of the control box 9;

[0039] It should be noted that: 1. First, wastewater is injected into the dirty water storage cavity in the sedimentation tank body 1 to precipitate the impurities in the wastewater, and the supernatant overflows into the clean water storage cavity, which can remove a large amount of solid impurities in the rolling mill wastewater and avoid pipeline blockage;

[0040] 2. A non-contact ultrasonic level gauge 2 is selected to control the operation of the horizontal pump 8 to complete sewage discharge;

[0041] 3. Select the side-mounted float switch 3 to avoid sewage overflow caused by damage to the ultrasonic level gauge 2 and prevent the wrong alarm signal from being sent simultaneously;

[0042] 4. The action of the side-mounted float switch 3 also triggers the switching of the inlet and outlet pipes, allowing the wastewater to be directly discharged without affecting the discharge of underground sewage;

[0043] 5. Adopt a multi-functional digital meter 5 to display the liquid level of the sedimentation tank body and can modify the start-stop liquid level value;

[0044] 6. The sewage branch pipe connecting the sewage discharge pipe 4 and the output end of the horizontal pump 8 provides pressure protection through the pressure switch 6. During the operation of the horizontal pump 8, if the pressure is too low, the motor alarm 7 will be triggered to alarm;

[0045] 7. Select a high-decibel motor alarm 7 to alarm, attracting operators to handle abnormalities early and avoid the expansion of faults;

[0046] 8. The horizontal pump 8 adopts star-delta starting, reducing the impact on the pipeline during direct starting;

[0047] 9. There is a manual-automatic selection, simple operation and obvious indication;

[0048] 10. After the over-liquid-level alarm, the straight-through valve 10 and the inlet valve 11 are closed to control the pipeline switching, which does not affect the underground sewage discharge and prevents the sewage in the underground sewage pit 12 from overflowing.

[0049] As Figure 1 、 Figure 3 shown, an underground sewage pit 12 is excavated below the sedimentation tank body 1;

[0050] An upright pump 13 is installed at the top edge of the underground sewage pit 12. A dirty water outlet pipe is installed between the output end of the upright pump 13 and the underground sewage pit 12, and a dirty water inlet pipe is conductively connected between the input end of the upright pump 13 and the sewage discharge pipe 4;

[0051] Both the straight-through valve 10 and the inlet valve 11 are electromagnetic control valves;

[0052] It should be noted that after the over-liquid-level alarm, the straight-through valve 10 and the inlet valve 11 are closed to control the pipeline switching, which does not affect the underground sewage discharge and prevents the sewage in the underground sewage pit 12 from overflowing.

[0053] As Figure 2 shown, the root of the dirty water storage cavity is conductively connected to an emptying pipe, and an emptying valve 14 is installed at the emptying pipe;

[0054] It should be noted that after the over-liquid-level alarm, the emptying valve 14 at the emptying pipe is opened to quickly discharge the sewage in the dirty water storage cavity, which can effectively prevent sewage overflow.

[0055] AsFigure 2 As shown, the trigger end of the side-mounted float switch 3 is located inside the purified water storage cavity;

[0056] It should be noted that a non-contact ultrasonic level gauge 2 is selected to control the operation of the horizontal pump 8 to complete the sewage discharge. A side-mounted float switch 3 is selected to avoid sewage overflow caused by damage to the ultrasonic level gauge 2 and prevent incorrect alarm signals from being sent simultaneously.

[0057] Such as Figure 2 As shown, a pipeline is conductively connected between the input end of the horizontal pump 8 and the root of the purified water storage cavity;

[0058] It should be noted that the horizontal pump 8 adopts star-delta starting, which reduces the impact on the pipeline during direct starting.

[0059] The ultrasonic level gauge 2, side-mounted float switch 3, multifunctional digital instrument 5, pressure switch 6, motor alarm 7, horizontal pump 8, straight-through valve 10, inlet valve 11, and vertical pump 13 are all electrically connected to the control box 9.

[0060] During use: 1. First, wastewater is injected into the dirty water storage cavity in the sedimentation tank body 1 to precipitate the impurities in the wastewater, and the supernatant overflows into the purified water storage cavity, which can remove a large amount of solid impurities in the rolling mill wastewater and avoid pipeline blockage;

[0061] 2. A non-contact ultrasonic level gauge 2 is selected to control the operation of the horizontal pump 8 to complete the sewage discharge;

[0062] 3. A side-mounted float switch 3 is selected to avoid sewage overflow caused by damage to the ultrasonic level gauge 2 and prevent incorrect alarm signals from being sent simultaneously;

[0063] 4. The action of the side-mounted float switch 3 also triggers the switching of the inlet and outlet pipelines, allowing the wastewater to be directly discharged without affecting the discharge of underground sewage;

[0064] 5. A multifunctional digital instrument 5 is used to display the liquid level of the sedimentation tank body and can modify the start-stop liquid level value;

[0065] 6. The sewage branch pipe connecting the sewage pipeline 4 and the output end of the horizontal pump 8 is provided with pressure protection by the pressure switch 6. During the operation of the horizontal pump 8, if the pressure is too low, the motor alarm 7 will be triggered to alarm;

[0066] 7. A high-decibel motor alarm 7 is selected to alarm, attracting operators to deal with abnormalities early and avoiding the expansion of faults;

[0067] 8. The horizontal pump 8 adopts star-delta starting, which reduces the impact on the pipeline during direct starting;

[0068] 9. There is a manual-automatic selection, with simple operation and obvious indication;

[0069] 10. After the ultra-level alarm, the straight-through valve 10 and the water inlet valve 11 are closed to control the pipeline switching, which does not affect the underground sewage discharge and prevents the sewage in the underground sewage pit 12 from overflowing.

[0070] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An electric control device for a wastewater pump of a rolling mill wastewater sedimentation tank, comprising a sedimentation tank body (1), a side-mounted float switch (3) installed on the side wall of the sedimentation tank body (1), and a sewage discharge pipe (4) conductively connected to the sedimentation tank body (1), characterized in that: The sedimentation tank body (1) is divided into a dirty water storage chamber and a clean water storage chamber on the inner side; An ultrasonic level meter (2) is installed above the clean water storage chamber; A control box (9) is installed on the outside of the sedimentation tank body (1), and a multifunctional digital instrument (5) is installed on the surface of the control box (9); A horizontal pump (8) is installed at the outer root of the sedimentation tank body (1), a branch pipeline is conductively connected between the output end of the horizontal pump (8) and the sewage pipe (4), and a pressure switch (6) is installed between the branch pipeline and the control end of the control box (9); A motor alarm (7) is installed on the side wall of the control box (9); A through valve (10) is installed between the sewage pipe (4) and the control end of the control box (9); A sewage branch pipe is provided between the sewage pipe (4) and the dirty water storage chamber, and a water inlet valve (11) is installed between the sewage branch pipe and the control end of the control box (9).

2. The electric control device for the wastewater pump of the rolling mill wastewater sedimentation tank according to claim 1 is characterized in that: An underground sewage pit (12) is excavated below the sedimentation tank body (1); A vertical pump (13) is installed at the top edge of the underground sewage pit (12), a dirty water outlet pipe is installed between the output end of the vertical pump (13) and the underground sewage pit (12), and a dirty water inlet pipe is conductively connected between the input end of the vertical pump (13) and the sewage pipe (4).

3. The electric control device for the wastewater pump of the rolling mill wastewater sedimentation tank according to claim 1 is characterized in that: The root of the dirty water storage chamber is connected to a drain pipe, and a drain valve (14) is installed at the drain pipe.

4. The electric control device for the wastewater pump of the rolling mill wastewater sedimentation tank according to claim 1 is characterized in that: The trigger end of the side-mounted float switch (3) is located inside the clean water storage chamber.

5. The electric control device for the wastewater pump of the rolling mill wastewater sedimentation tank according to claim 1 is characterized in that: A pipeline is conductively connected between the input end of the horizontal pump (8) and the root of the clean water storage chamber.

6. The electric control device for the wastewater pump of the rolling mill wastewater sedimentation tank according to claim 1 is characterized by: The through valve (10) and the water inlet valve (11) are both electromagnetic control valves.

7. The electric control device for the wastewater pump of the rolling mill wastewater sedimentation tank according to claim 2 is characterized by: The ultrasonic level meter (2), the side-mounted float switch (3), the multifunctional digital instrument (5), the pressure switch (6), the motor alarm (7), the horizontal pump (8), the through valve (10), the water inlet valve (11) and the vertical pump (13) are all electrically connected to the control box (9).

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