CN220834292U - Backwash system of sand filter tank of water works - Google Patents

Abstract

The back flushing system of the sand filter tank of the water works comprises a PLC, a water pump, a water outlet electromagnetic valve, a liquid level meter, an electric proportional valve, an electromagnetic blow-off valve, an electromagnetic primary filter valve, an electromagnetic water inlet valve, an electromagnetic flushing valve, a water quality detector and an air compressor, wherein the liquid inlet end of the water pump is connected with a water source pipeline, the liquid outlet end of the water pump is connected with one end of the water outlet electromagnetic valve, and the other end of the water outlet electromagnetic valve is connected with a water inlet pipe of a water tower; one end of the electromagnetic flushing valve is connected with a water outlet pipe of the water tower, and one electromagnetic water inlet end is connected with a water outlet pipe of the water supply area; the two sets of liquid level valves are respectively arranged in the water tower and the sand filter tank, the other ends of the electromagnetic water inlet valve and the electromagnetic flushing valve are respectively connected with the water inlet pipe at one side of the sand filter tank, the sewage discharging electromagnetic valve, the electromagnetic primary filter valve and the waste water pipe are connected in parallel, the other ends of the electric proportional valves are connected with the water pipeline, and the water quality detector is arranged in the sand filter tank. The novel sand filter can realize the backflushing cleaning of the sand filter fully automatically and non-manually, brings convenience to staff and improves the backflushing effect.

Description

Backwash system of sand filter tank of water works

Technical Field

The utility model relates to the technical field of water treatment equipment, in particular to a backwash system of a sand filter tank of a water works.

Background

In order to ensure clean water supply in a water works, a sand filter is generally adopted to filter raw water. The sand filter of the current water factory has the forms of V-shaped filter and common filter, etc., in actual production, after water filters for a period of time, the impurity in the water can accumulate on the filter layer, influence the filtration productivity of the filter, at this time, the filter layer of the filter needs to be cleaned. The existing sand filter generally adopts a manual back flushing mode to control and clean a filter layer, specifically, when the impurities in the filter are excessive, a water inlet gate is temporarily closed, and the water level of the filter is reduced; starting a water pump to feed water to the water tower to a certain water level, reducing the liquid level of the filter tank to a specified height, opening a drain valve, and closing a clear water valve after the liquid level reaches the lowest water level so as to avoid emptying the filter tank; the backflushing valve is opened to flush the filter material of the filter by utilizing the gravitational potential energy of the water stored in the high-rise water tower, and the backflushing valve is closed after the water level of the water tower is the lowest; and (3) opening a water inlet gate filter to feed water, standing the filter, opening a primary filter valve to discharge primary filter water with a specific time period before starting, closing the primary filter valve, slowly opening a clear water valve, and enabling the filter to enter a normal running state. Because the whole back flush time is longer and the flushing process is comparatively loaded down with trivial details, operation flows such as pump, valve are complicated to require highly, and manual operation has the maloperation, wastes time, laborious problem, and different staff receives experience different influences, and individual operation difference also can influence back flush effect, and then influences the cleaning production efficiency of filtering pond.

Patent number "202222927007.0", patent name "a sand filter of automatic back flush", its content is recorded "the hole mesh of vertical segmentation net is greater than filter media", not only can make between filter media and the filter media in close contact, the vertical segmentation net can also keep the steadiness ability to same layer filter media simultaneously, prevents under the impact of rivers, and the clearance between the filter media is too increased, keeps filter media's filter effect). The above-mentioned comparison patent has the advantages, but is limited by the structure, and the comparison patent also has the problems that the manual operation is time-consuming and labor-consuming, individual operation difference influences the backwashing effect and further influences the cleaning production efficiency of the filter tank as the prior art in the field needs manual operation.

Disclosure of utility model

In order to overcome the defects that the existing sand filter matched with a tap water supply system is required to be fully manually operated due to the limited structure, the manual operation is easy to operate by mistake, time and labor are wasted, the individual operation difference can influence the backwashing effect and the cleaning production efficiency of the filter, the utility model provides a sand filter backwashing system which can fully automatically and non-manually realize the backwashing of the sand filter when the water quality in the sand filter is deteriorated to a certain degree or reaches a specified operation period under the action of related equipment, thereby bringing convenience to staff, reducing the possibility of misoperation and improving the sand filter backwashing system of a tap water plant.

The technical scheme adopted for solving the technical problems is as follows:

The water works sand filter back flushing system comprises a PLC, a water pump, a water outlet electromagnetic valve, a liquid level meter, an electric proportional valve, an electromagnetic drain valve, an electromagnetic primary filter valve, an electromagnetic water inlet valve, an electromagnetic flushing valve, a water quality detector and an air compressor, wherein the power supply input ends of the water pump, the water outlet electromagnetic valve, the electric proportional valve, the electromagnetic drain valve, the electromagnetic primary filter valve, the electromagnetic water inlet valve, the electromagnetic flushing valve and the electromagnetic exhaust valve of the air compressor are respectively and electrically connected with the multi-path control power supply output end of the PLC, and the signal output ends of the liquid level meter and the water quality detector are respectively and electrically connected with the three signal input ends of the PLC; the water pump is characterized in that a liquid inlet end of the water pump is connected with a water source pipeline, a liquid outlet end of the water pump is connected with one end of a water outlet electromagnetic valve, and the other end of the water outlet electromagnetic valve is connected with a water inlet pipe of a water tower; one end of the electromagnetic flushing valve is connected with a water outlet pipe of the water tower, and one end of the electromagnetic water inlet valve is connected with a water outlet pipe of the water supply area; the water level meter is provided with at least two sets, the two sets of water level meters are respectively arranged in the water tower and the sand filter tank, the other ends of the electromagnetic water inlet valve and the electromagnetic flushing valve are respectively connected with the water inlet pipe at one side of the sand filter tank, the water draining electromagnetic valve and the electromagnetic primary filtering valve are connected with the waste water pipe in parallel, the other ends of the electric proportional valves are connected with the water pipeline, and the water quality detector is arranged at the clean water branch pipe position of the sand filter tank.

Further, a plurality of air charging pipes are arranged at the inner lower end of the sand filter, one end of each air charging pipe is arranged together with the air inlet pipe, the other end of each air charging pipe is sealed, a plurality of exhaust holes are arranged at the upper end of each air charging pipe, and the air inlet pipe is connected with the air outlet end of the electromagnetic exhaust valve of the air compressor.

Further, the water outlet electromagnetic valve, the electromagnetic primary filter valve, the electromagnetic drain valve, the electromagnetic water inlet valve, the electromagnetic flushing valve and the electromagnetic exhaust valve are normally closed valve core electromagnetic valves.

Further, the level gauge is an ultrasonic level gauge.

Furthermore, the PLC can also adopt an upper computer or a singlechip module.

The utility model has the beneficial effects that: the utility model discloses based on PLC, can gather the quality of water condition in the sand filter through water quality detector A2 in real time, when the quality of water variation, PLC can full-automatic non-artificial realization sand filter water recoil washs, makes filtering pond impurity discharge through the drainage solenoid valve along with the backwash water, the utility model provides a convenience to the staff to the backwash effect has been improved.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of the body structure of the present utility model.

Fig. 2 is a circuit diagram of the present utility model.

Detailed Description

The back flushing system of the sand filter tank of the water works is shown in figures 1 and 2, and comprises a PLC, a water pump M, a water outlet electromagnetic valve DC1, liquid level meters A1 and A2, an electric proportional valve DC2 (a finished product in the prior art, a current signal input by the PLC is high in valve core opening and closing degree and small in valve core opening and closing degree), an electromagnetic water discharge valve DC3, an electromagnetic primary filter valve DC4, an electromagnetic water inlet valve DC5, an electromagnetic flushing valve DC6, a water quality detector A3 and an air compressor (not shown in the figures), wherein the power input ends of the water pump M, the water outlet electromagnetic valve DC1, the electric proportional valve DC2, the electromagnetic water discharge valve DC3, the electromagnetic primary filter valve DC4, the electromagnetic water inlet valve DC5, the electromagnetic flushing valve DC6 and an electromagnetic air discharge valve DC7 of the air compressor are respectively connected through wires, and the signal output ends of the liquid level meters A1 and A2 and the water quality detector A3 are respectively connected with three signal input ends of the PLC through wires; the liquid inlet ends of the two sets of water pumps M are connected with a water source (such as water under the water surface of a river or underground water and the like) through pipelines, the liquid outlet ends of the two sets of water pumps M are connected with one ends of two water outlet electromagnetic valves DC1 through pipelines, and the other ends of the two water outlet electromagnetic valves DC1 are connected with a water inlet pipe outside the middle part of the water tower 1 in parallel through pipelines; one end of the electromagnetic flushing valve DC6 is connected with a water outlet pipe of the water tower through a pipeline, and one end of the electromagnetic water inlet valve DC5 is connected with a water outlet pipe of a water supply area (for example, the electromagnetic water inlet valve DC5 is connected with a liquid outlet pipe of a water suction pump at a water taking river through a pipeline); the two sets of liquid level meters A1 and A2 are respectively arranged in the water tower 1 and the upper end in the sand filter 2 (the detecting head is positioned at the inner lower end), and the other ends of the electromagnetic water inlet valve DC5 and the electromagnetic flushing valve DC6 are respectively connected with the water inlet pipes at the upper and lower ends of the left middle part of the sand filter 2 through threads; the water draining pipe at the right upper part, the middle part and the lower part of the sand filter tank 2, the drainage electromagnetic valve DC3, the electromagnetic primary filter valve DC4 and one end of the electric proportional valve DC2 are respectively connected through threads, the drainage electromagnetic valve DC3, the electromagnetic primary filter valve DC4 and a waste water pipe are connected in parallel through threads, the other end of the waste water pipe is positioned at the upper end of a waste water tank and the like, the other end of the electric proportional valve DC2 is connected with a water using pipe through threads, and the water quality detector A3 is arranged outside the upper end of the sand filter tank 2 and the probe of the water quality detector A3 is positioned in the sand filter tank 2. The novel use of the water pump, the water tower and the like as flushing water can achieve better back flushing effect because the water tower has high water level and larger water pressure compared with water entering through the water inlet electromagnetic valve.

In the figures 1 and 2, a plurality of air charging pipes 3 are welded at the front and back of the inner lower end of the sand filter, the left end of each air charging pipe 3 and an air inlet pipe 4 are welded together in parallel in a sealing way, and the air charging pipes 3 and the air inlet pipes 4 are communicated with each other, so that the right ends of the air charging pipes 3 are sealed, a plurality of exhaust holes 31 are formed in the upper end of each air charging pipe 3 at a certain distance left and right, the left end of each air inlet pipe 4 is positioned outside the sand filter, and the air outlet ends of the air inlet pipes 4 and the electromagnetic exhaust valves DC7 of the air compressor are connected through pipelines. The water outlet electromagnetic valve DC1, the electromagnetic drain valve DC3, the electromagnetic primary filter valve DC4, the electromagnetic water inlet valve DC5, the electromagnetic flushing valve DC6 and the electromagnetic exhaust valve DC7 are normally closed valve core electromagnetic valves. The liquid level meters A1 and A2 are throw-in type liquid level meters (the water level is different in height and can output current signals with different magnitudes, and the signal current is larger as the water level is higher, and conversely, is lower as the water level is higher). The PLC can also adopt an upper computer or a singlechip module.

The water quality conditions in the sand filter tank 2 can be acquired in real time by the water quality detector A3 based on the PLC shown in figures 1 and 2. When the water quality in the sand filter tank 2 is poor, the signal output by the water quality detector A3 to the signal input end of the PLC is increased, so that the PLC can control the whole equipment to enter a backwashing flow; specifically, when the back flushing is started, the power supply of the electromagnetic water inlet valve DC5 is firstly turned off by the PLC, the electric proportional valve DC2 (clean water valve) is opened by a certain opening degree (opening degree 40), after all the electromagnetic water inlet valve DC5 is turned off, the PLC controls the water tower pump M (water pump) to be electrically operated, the PLC controls the water outlet electromagnetic valve DC1 to be electrically opened by the valve core, and thus, the water tower 1 starts to feed water. The water level of the water tower 1 continuously rises, and when the water level of the water tower 1 rises to the set value depth of the liquid level meter A1 (2.1 meters), the PLC closes the power supply of the water outlet electromagnetic valve DC1 of the water tower pump and the water tower pump M. Because the electric valve core of the electric proportional valve DC2 is opened, the water level of the sand filter tank 2 continuously drops when water is fed into the water tower, when the water level drops to a value set by the liquid level meter A2 (0.2 meter), the PLC controls the electric proportional valve DC2 to lose electricity and controls the electromagnetic drain valve DC3 to be opened to start water discharge (water is slightly higher than a water inlet pipe of the electromagnetic drain valve DC 3), then the PLC controls the electromagnetic flushing valve DC6 to be opened to start backflushing operation (backflushing of water in the water tower) by the valve core, the water level in the water tower continuously drops after backflushing starts (6 minutes) for a period of time, after the water level drops to a set value of the liquid level meter A1 (0.3 meter), the PLC closes the electromagnetic flushing valve DC6, and closes the electromagnetic drain valve DC3 (water in the water tower enters the sand filter tank 2 to discharge water containing impurities through the electromagnetic drain valve DC 3). After the electromagnetic drain valve DC3 is closed, the PLC controls the power-on valve core of the electromagnetic primary filter valve DC4 to be opened, the electromagnetic primary filter valve DC4 is powered on for a period of time (generally 3 minutes), the PLC closes the electromagnetic primary filter valve DC4 (the electromagnetic primary filter valve DC4 is opened to discharge muddy water in the filter tank), after the electromagnetic primary filter valve DC4 is fully closed, the electromagnetic water inlet valve DC5 is opened, the water level of the sand filter tank 2 is gradually increased gradually, and after the liquid level meter A2 detects that the depth is proper (1.2 meters), the PLC closes the electromagnetic water inlet valve DC5; after the electromagnetic water inlet valve DC5 is completely closed, the filter tank enters a maintenance timing (generally for 1 hour, the maintenance function is to enable filter sand in the filter tank to be smooth), then the PLC controls the electromagnetic water inlet valve DC5 to be opened, the filter tank enters a normal filtering program (the water level of the filter tank can be set), and the PLC controls the valve opening of the electric proportional valve DC2 and the electromagnetic water inlet valve DC5 to work or not work based on signals input by the liquid level meter A2 according to set liquid level data, so that the water level of the filter tank is always infinitely close to a set value (namely, the electromagnetic water inlet valve DC5 is respectively opened or closed when water is used by a user, and the proper water level is kept in the sand filter tank). In this novel, specific, every certain time in the interval, before the recoil, electromagnetic vent valve DC 7's power can be opened to the staff, and like this, the compressed gas of air compressor machine output can upwards discharge impact sand filtering layer through a plurality of exhaust holes 31 of gas tube, and impurity in the sand can float follow-up drain valve discharge in the follow-up on the surface of water as far as possible, and this novel has brought the facility for the staff to the backwash effect has been improved. The liquid level meters A1 and A2 are throw-in type liquid level meter finished products (two power input ends and one signal output end) of the model WRT-136; the water quality detector A3 is a finished product of the water quality detector of the model OHR-PH10, and the better the water quality detected during operation, the lower the current signal output by the signal output end is, and the higher the current signal is (two power input ends and one signal output end is) on the contrary. The power input end of the liquid level meter and the water quality detector are connected with the power output end of the 220V-to-DC 12V power module matched with the PLC through a wire. The application relates to a PLC or an upper computer, which is used for acquiring signals of various sensors and controlling the working modes of various electric equipment according to the signals, and is a data acquisition and control technology of the existing extremely mature PLC or the upper computer.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (5)

1. The water works sand filter back flushing system comprises a PLC, a water pump, a water outlet electromagnetic valve, a liquid level meter, an electric proportional valve, an electromagnetic drain valve, an electromagnetic primary filter valve, an electromagnetic water inlet valve, an electromagnetic flushing valve, a water quality detector and an air compressor, wherein the power supply input ends of the water pump, the water outlet electromagnetic valve, the electric proportional valve, the electromagnetic drain valve, the electromagnetic primary filter valve, the electromagnetic water inlet valve, the electromagnetic flushing valve and the electromagnetic exhaust valve of the air compressor are respectively and electrically connected with the multi-path control power supply output end of the PLC, and the signal output ends of the liquid level meter and the water quality detector are respectively and electrically connected with the three signal input ends of the PLC; the water pump is characterized in that a liquid inlet end of the water pump is connected with a water source pipeline, a liquid outlet end of the water pump is connected with one end of a water outlet electromagnetic valve, and the other end of the water outlet electromagnetic valve is connected with a water inlet pipe of a water tower; one end of the electromagnetic flushing valve is connected with a water outlet pipe of the water tower, and one end of the electromagnetic water inlet valve is connected with a water outlet pipe of the water supply area; the water level meter is provided with at least two sets, the two sets of water level meters are respectively arranged in the water tower and the sand filter tank, the other ends of the electromagnetic water inlet valve and the electromagnetic flushing valve are respectively connected with the water inlet pipe at one side of the sand filter tank, the water draining electromagnetic valve and the electromagnetic primary filtering valve are connected with the waste water pipe in parallel, the other ends of the electric proportional valves are connected with the water pipeline, and the water quality detector is arranged at the clean water branch pipe position of the sand filter tank.

2. The backwash system of the sand filter tank of the water works according to claim 1, wherein a plurality of air charging pipes are arranged at the inner lower end of the sand filter tank, one end of each air charging pipe is arranged together with an air inlet pipe, the other end of each air charging pipe is sealed, a plurality of air discharging holes are arranged at the upper end of each air charging pipe, and the air inlet pipe is connected with the air outlet end of an electromagnetic air discharging valve of the air compressor.

3. The backwash system of a sand filter tank in a water works according to claim 1, wherein the water outlet solenoid valve, the electromagnetic primary filter valve, the electromagnetic drain valve, the electromagnetic water inlet valve, the electromagnetic flushing valve and the electromagnetic exhaust valve are normally closed valve core solenoid valves.

4. The waterworks sand filter backwash system of claim 1 wherein the level gauge is an ultrasonic level gauge.

5. The backwash system of a sand filter tank in a water works as claimed in claim 1, wherein the PLC can also use an upper computer or a single chip microcomputer module.