CN215409257U

CN215409257U - Sand pump back flush system is inhaled to dive

Info

Publication number: CN215409257U
Application number: CN202120457809.2U
Authority: CN
Inventors: 吴凤翔
Original assignee: DALIAN DAKAI SEWAGE TREATMENT CO LTD
Current assignee: DALIAN DAKAI SEWAGE TREATMENT CO LTD
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2022-01-04
Anticipated expiration: 2031-03-03

Abstract

A back washing system of a submersible sand suction pump belongs to the technical field of sewage treatment. The system adjusts and controls the back-washing system through the PLC control cabinet to realize back-washing of the whole pipeline, the volute of the sand suction pump, the sand suction pipe, gravel deposited or deposited at the bottom of the grit chamber and the like. When the pipeline or the pump inlet is blocked, the backwashing system cleans the pipeline to ensure that the pipeline is smooth and the deposited gravel at the bottom is diffused, so that the sand suction pump can work normally and stably. In addition, the sand suction pipe can be prevented from being broken and bent, when the sand suction pump or the sand suction pipe is blocked, the sewage valve at the bottom of the pool is not required to be opened for emptying through manual operation, time and labor are saved, and potential safety hazards are prevented from occurring.

Description

Sand pump back flush system is inhaled to dive

Technical Field

The utility model relates to a backwashing system of a submersible sand pump, belonging to the technical field of sewage treatment.

Background

The bridge type sand suction machine is mainly used in a horizontal flow type aeration grit chamber of a sewage treatment plant to remove grit, slag particles and the like at the bottom of the grit chamber. The bridge sand sucker moves back and forth along the steel rail on the surface of the aeration sand setting tank, and a sand sucking pump on the bridge sand sucker sucks out and lifts the mixed liquid of large particles such as gravel, coal slag and the like settled at the bottom and sewage into a sand discharging groove beside the tank, and the mixed liquid enters a sand-stone separator for separation.

At present, a sand suction pump of a bridge type sand suction machine mostly adopts a non-blocking submersible sewage pump, and the pump does not need water diversion operation, is non-blocking and is wear-resistant. However, the sand suction pump is often stopped due to the motor burnout, blockage, poor coupling and the like, and if the operator does not find the sand suction pump in time, the bottom sand setting is too high, and the sand setting can block the suction inlet during the operation again, so that the sand suction pump cannot work normally. Or because of the design problem, the water inlet of the aeration tank is easy to gather gravels to form a dead angle, and the sand suction inlet of the sand suction pump is easy to block up when the sand suction is not carried out in time, so that the sand suction pump cannot work normally. The bottom of the pool sand volume is too high to lead to inhaling the unable normal during operation of sand pump, generally needs the operation personnel manual operation to open the evacuation valve of bottom of the pool, discharges out the grit of siltation, just enables to inhale sand pump and resumes the operation, wastes time and energy like this and can not continuous operation, and the grit of discharging moreover needs to get into the system again and handles.

Disclosure of Invention

The utility model aims to provide a backwashing system of a submersible sand pump, which is convenient for operators to operate under abnormal conditions, prevents a sand suction pipe from being broken and bent, ensures that a pipeline is smooth by cleaning, diffuses gravel deposited at the bottom, ensures that the sand pump can work normally and stably, and is beneficial to efficient and safe standard operation of sewage treatment equipment.

The utility model solves the technical problems in the prior art by adopting the following technical scheme: a backwash system of a submersible sand pump comprises a bridge sand pump, a second sand pump, a bridge sand suction vehicle and a driving device for driving the bridge sand suction vehicle, wherein the bridge sand suction vehicle is arranged at the top of a grit chamber, the first sand pump and the second sand pump are arranged on a bracket of the bridge sand suction vehicle extending into the grit chamber, the lower end of the first sand pump is connected with a first sand suction pipe, the upper end of the first sand pump is connected with a first sand discharge pipe, the lower end of the second sand pump is connected with a second sand suction pipe, the upper end of the second sand pump is connected with a second sand discharge pipe, the backwash system comprises a PLC control cabinet and a backwash pump, the PLC control cabinet and the backwash pump are arranged at the top of the bridge sand suction vehicle, the water inlet of the backwash pump is connected with a water suction pipe inserted into the grit chamber, the water outlet of the pump is connected with a backwash pipe through a main electric valve, the backwash pipe is connected with the first sand discharge pipe through a first branch pipe and a first electric valve, and is connected with the second sand discharge pipe through a second branch pipe and a second electric valve, and a third electric valve is arranged on the pipe section on the right side of the connecting point of the first sand discharge pipe and the first branch pipe, and a fourth electric valve is arranged on the pipe section on the right side of the connecting point of the second sand discharge pipe and the second branch pipe.

The PLC control cabinet is electrically connected with the backwashing pump, the main electric valve, the first electric valve, the second electric valve, the third electric valve and the fourth electric valve.

The utility model has the beneficial effects that: the utility model provides a sand pump back flush system is inhaled to dive, back flush system includes PLC switch board and back flush pump, PLC switch board and back flush pump are established at bridge type sand suction car's top, the water inlet of back flush pump is connected and is inserted the pipe that absorbs water of grit chamber inside, the delivery port passes through total motorised valve and connects the back flush pipe, the back flush pipe passes through first branch pipe and first motorised valve and connects first sand discharging pipe, connect second sand discharging pipe through second branch pipe and second motorised valve, set up the third motorised valve on the pipe section on first sand discharging pipe and the first branch pipe tie point right side, set up the fourth motorised valve on the pipe section on the second sand discharging pipe and the second branch pipe tie point right side. The system adjusts and controls the back-washing system through the PLC control cabinet to realize back-washing of the whole pipeline, the volute of the sand suction pump, the sand suction pipe, gravel deposited or deposited at the bottom of the grit chamber and the like. When a pipeline is blocked or a pump inlet is blocked, the backwashing system cleans the pipeline to ensure that the pipeline is smooth, gravel deposited at the bottom is diffused, and the sand suction pump can work normally and stably and is convenient to operate. In addition, the sand suction pipe can be prevented from being broken and bent, when the sand suction pump or the sand suction pipe is blocked, the sewage valve at the bottom of the pool is not required to be opened for emptying through manual operation, time and labor are saved, and potential safety hazards are prevented from occurring.

Drawings

Fig. 1 is a schematic structural diagram of a backwash system of a submersible sand pump.

In the figure: 1. the system comprises a PLC control cabinet, 2 a backwashing pump, 3 a main electric valve, 4 a first electric valve, 5 a second electric valve, 6a backwashing pipe, 7 a water suction pipe, 8a first sand suction pump, 8a first sand discharge pipe, 8b a third electric valve, 8c a first sand suction pipe, 9a second sand suction pump, 9a second sand discharge pipe, 9b a fourth electric valve, 9c a second sand suction pipe, 10a bridge type sand suction vehicle, 10a driving device, 11 and a grit chamber.

Detailed Description

The utility model is described below with reference to the accompanying drawings and the detailed description:

fig. 1 shows a schematic structural diagram of a backwash system of a submersible sand pump. In the figure, the backwashing system of the submersible sand pump comprises a bridge type sand suction machine, a first sand suction pump 8, a second sand suction pump 9, a bridge type sand suction vehicle 10 and a driving device 10a for driving the bridge type sand suction vehicle 10, wherein the bridge type sand suction vehicle 10 is arranged at the top of a grit chamber 11, the first sand suction pump 8 and the second sand suction pump 9 are arranged on a bracket of the bridge type sand suction vehicle 10 extending into the grit chamber 11, the lower end of the first sand suction pump 8 is connected with a first sand suction pipe 8c, the upper end of the first sand suction pump 8 is connected with a first sand discharge pipe 8a, the lower end of the second sand suction pump 9 is connected with a second sand suction pipe 9c, the upper end of the second sand discharge pipe 9a, sand discharge ports of the first sand discharge pipe 8a and the second sand discharge pipe 9a extend into a sand discharge groove at the side of the grit chamber 11, the backwashing system comprises a PLC control cabinet 1 and a backwashing pump 2, the PLC control cabinet 1 and the backwashing pump 2 are arranged at the top of the water inlet of the bridge type sand suction pump 10, the backwashing pump 2 is connected with a water suction pipe 7 inserted into the grit chamber 11, the water outlet is connected with a back flushing pipe 6 through a main electric valve 3, the back flushing pipe 6 is connected with a first sand discharging pipe 8a through a first branch pipe 6a and a first electric valve 4, the back flushing pipe 6 is connected with a second sand discharging pipe 9a through a second branch pipe 6b and a second electric valve 5, a third electric valve 8b is arranged on the pipe section on the right side of the connecting point of the first branch pipe 6a on the first sand discharging pipe 8a, and a fourth electric valve 9b is arranged on the pipe section on the right side of the connecting point of the second branch pipe 6b on the second sand discharging pipe 9 a.

The PLC control cabinet 1 is electrically connected with the backwashing pump 2, the general electric valve 3, the first electric valve 4, the second electric valve 5, the third electric valve 8b and the fourth electric valve 9 b.

The working principle of the back flushing system of the submersible sand pump is as follows: the operation of the backwashing system is controlled by the PLC control cabinet 1, when the first sand suction pump 8 and the first sand suction pipe 8c are blocked, the third electric valve 8b is closed by the PLC control cabinet 1, the backwashing pump 2 is started, the main electric valve 3 and the first electric valve 4 are sequentially opened after the backwashing pump 2 is normally opened, the first sand suction pump 8 and the first sand suction pipe 8c are backwashed, the first electric valve 4 and the main electric valve 3 are sequentially closed after the pump volute, the pipeline and the pipeline bottom are unblocked, the third electric valve 8b is opened, and the backwashing pump 2 is closed. When the second sand suction pump 9 and the first sand suction pipe 9c are blocked, the PLC control cabinet 1 closes the fourth electric valve 9b, the backwashing pump 2 is started, the main electric valve 3 and the second electric valve 5 are sequentially opened after the backwashing pump 2 is normally opened, the second sand suction pump 9 and the first sand suction pipe 9c are backwashed, the pump volute, the pipeline and the bottom of the pipeline are unblocked, then the second electric valve 5 and the main electric valve 3 are closed, the fourth electric valve 9b is opened, and the backwashing pump 2 is closed.

When the first sand suction pump 8, the first sand suction pipe 8c, the second sand suction pump 9 and the first sand suction pipe 9c simultaneously break down, the third electric valve 8b and the fourth electric valve 9b are closed simultaneously, the backwashing pump 2 is started, the main electric valve 3, the first electric valve 4 and the second electric valve 5 are opened in sequence to flush the two sets of pump systems until the bottoms of the pump volute, the pipeline and the pipeline are unblocked, the first electric valve 4, the second electric valve 5 and the main electric valve 3 are closed in sequence, the third electric valve 8b and the fourth electric valve 9b are opened simultaneously, the backwashing pump 2 is closed, and the water outlet pipe, the sand suction pump and the sand suction pipe of the whole sand suction pump can continue to work normally. Therefore, the back washing of the whole pipeline, the volute of the sand suction pump, the sand suction pipe, the deposited or deposited gravel and the like at the bottom of the aeration grit chamber can be realized, the pipeline is smooth, the deposited and deposited gravel under the sand suction pipe can be spread, and the sand suction pump can smoothly pump up the gravel.

Claims

1. A backwash system of a submersible sand pump is disclosed, wherein a bridge sand pump comprises a first sand pump (8), a second sand pump (9), a bridge sand suction truck (10) and a driving device (10 a) for driving the bridge sand suction truck (10), the bridge sand suction truck (10) is arranged at the top of a grit chamber (11), the first sand pump (8) and the second sand pump (9) are arranged on a bracket of the bridge sand suction truck (10) extending into the grit chamber (11), the lower ends of the first sand pump (8) and the second sand pump (9) are connected with a first sand suction pipe (8 c) and a second sand suction pipe (9 c), the upper ends of the first sand pump and the second sand discharge pipe (8 a) and a 9 a), the backwash system is characterized in that the backwash system comprises a PLC control cabinet (1) and a backwash pump (2), the PLC control cabinet (1) and the PLC pump (2) are arranged at the top of the bridge sand suction truck (10), and the water inlet of the PLC pump (2) is connected with a water suction pipe (7) inserted into the grit chamber (11), the water outlet is connected with a backwashing pipe (6) through a main electric valve (3), the backwashing pipe (6) is connected with a first sand discharging pipe (8 a) through a first branch pipe (6 a) and a first electric valve (4), the backwashing pipe (6) is connected with a second sand discharging pipe (9 a) through a second branch pipe (6 b) and a second electric valve (5), a third electric valve (8 b) is arranged on the pipe section on the right side of the connection point of the first sand discharging pipe (8 a) and the first branch pipe (6 a), and a fourth electric valve (9 b) is arranged on the pipe section on the right side of the connection point of the second sand discharging pipe (9 a) and the second branch pipe (6 b);

the PLC control cabinet (1) is electrically connected with the backwashing pump (2), the general electric valve (3), the first electric valve (4), the second electric valve (5), the third electric valve (8 b) and the fourth electric valve (9 b).