CN214036063U - Motor idling prevention protection device for sewage well - Google Patents

Abstract

The motor idling prevention protection device for the sewage well comprises a water level ball float valve, a water pump motor, an electric contact pressure gauge, a relay, a main contactor, a mains supply and the like; the water level float valve is arranged in the sewage well; one end of the electric contact pressure gauge is connected with the low water level switch of the ball float valve, and the other end is connected with the water pump motor; one end of the main contactor is connected with a mains supply, and the other end of the main contactor is connected with a water pump motor; and the relay is connected with the electric contact pressure gauge in parallel. Through implementing the utility model discloses protect the bilge well motor, utilize electrical contact manometer and electric control circuit to block, prevent that motor idle running from causing trouble, damage, reduce the motor barrier probability by a wide margin, practice thrift electrical equipment cost of maintenance, alleviate personnel's equipment maintenance task.

Description

Motor idling prevention protection device for sewage well

Technical Field

The utility model relates to a motor idle running protection device is prevented to bilge well is applicable to bilge well and other sump pit automatic drainage motor protection, and when drainage motor under low water level or anhydrous condition, the automatic disconnection motor power to avoid the motor to idle for a long time and lead to the fault damage.

Background

The national grid is about the office building in future city office area, the service building, A, B building areas in experiment building about 26 ten thousand square meters, the design has 51 bilge wells altogether, the bilge well distribution is relatively dispersed, office area office staff is many, kitchen miscellaneous, the discharge capacity is taken out to useless sewage is big, frequent operation of bilge well is opened and is stopped, bilge well pit internal water pump drainage is by water level floating ball valve control, the floater is soaked in the bilge well for a long time, sewage and debris are corroded and are sheltered from floater circuit, cause floater circuit rigidity, the floater can not normally float and whereabouts, when sewage reaches the low water level in the bilge well, the water pump can not normally stop, lead to the water pump idle running, cause the motor frequent operation trouble, the burning loss motor, reduction personnel work efficiency. The personnel patrol inspection time every day and have the interval, shelter from or the float valve causes the water pump motor to can not shut down because of the circuit corrodes the rigidity when taking place the float valve, and personnel can not in time discover, cause equipment damage. According to the situation, an electrical professional adds the sewage well motor idling prevention protection device to the electrical control loop through technical transformation, so that burning loss caused by motor idling is effectively prevented, and the power utilization safety service guarantee capacity is improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor idle running protection device is prevented to bilge well in order to solve the technical problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the motor idling prevention protection device for the sewage well; the low-water-level switch power supply comprises a low-water-level ball float valve, a water pump motor, an electric contact pressure gauge, a time relay, an intermediate relay, a main contactor, a ball float valve low-water-level switch power supply and a control loop power supply; it is characterized in that: the low-water-level ball float valve is arranged in the sewage well, one end of a switch of the low-water-level ball float valve is connected with a control loop power supply, and the other end of the switch of the low-water-level ball float valve is connected with a normally open contact and a normally closed contact incoming line end of the intermediate relay; one end of the electric contact pressure gauge is connected with the low water level switch power supply of the float valve in parallel, and the other end of the electric contact pressure gauge is connected with a coil incoming line end of the intermediate relay; the power end of the coil of the intermediate relay is connected with the outlet end of the electric contact pressure gauge, and the other end of the coil of the intermediate relay is connected with a commercial power zero line; one end of the normally closed contact of the intermediate relay is connected to the outlet end of the low-water-level ball float valve, and the other end of the normally closed contact of the intermediate relay is connected to a coil of the time relay and a time relay time-delay disconnection normally closed contact inlet end; one end of the normally open contact of the intermediate relay is connected to the outlet end of the low-water-level ball float valve, and the other end of the normally open contact of the intermediate relay is connected to the outlet end of the delay relay for delaying the opening of the normally closed contact; one end of the time relay coil is connected with a normally closed contact outlet end of the intermediate relay, and the other end of the time relay coil is connected with a commercial power zero line; one end of the time relay time-delay disconnection normally closed contact is connected to the normally closed contact wire outlet end of the intermediate relay, and the other end of the time relay time-delay disconnection normally closed contact is connected to the wire inlet end of the main contactor coil; one end of the main contactor coil is connected with a time relay to delay and break a normally closed contact outlet end, and the other end of the main contactor coil is connected with a commercial power zero line; one end of a main contact of the main contactor is connected with a mains supply, and the other end of the main contact is connected with a water pump motor; the relay coil is connected with the electric contact pressure gauge in series, the low-water-level floating ball valve switch is connected with the electric contact pressure gauge in parallel, the low-water-level floating ball valve switch, the intermediate relay normally closed contact, the time relay time-delay disconnection normally closed contact and the main contactor coil are connected in series, the intermediate relay normally open contact is connected with the intermediate relay normally closed contact in parallel, and the time relay time-delay disconnection normally closed contact is connected with the time relay coil in parallel.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses implement in the future city office area of national grid. There are 51 bilge wells in future city office area, and the distribution building is extensive, and personnel's tour time has the interval, implements the technical scheme of the utility model discloses before, when the interior water level of bilge well decline, water pump motor ball-cock assembly because sewage corrodes seriously, when having debris to shelter from, the ball-cock assembly can not normally return and stop the water pump motor, causes the long-time idle running damage of motor. Through implementing the utility model discloses protect the bilge well motor, utilize electrical contact manometer and electric control circuit to block, prevent that motor idle running from causing trouble, damage, reduce the motor barrier probability by a wide margin, practice thrift electrical equipment cost of maintenance, alleviate personnel's equipment maintenance task.

Drawings

Fig. 1 is a schematic view of the working principle of the present invention.

Fig. 2 is a schematic view of the connection of the elements of the protection device of the present invention.

Wherein: SL is a water level float valve switch; YX is an electric contact pressure gauge; KA is an intermediate relay; KT is a time relay; KM is a contactor.

Detailed Description

The invention will be further elucidated with reference to the drawings and specific embodiments, it being understood that these examples are intended to illustrate the invention only and are not intended to limit the scope of the invention, and that modifications to the various equivalent forms of the invention, which may occur to those skilled in the art after reading the present invention, fall within the scope of the invention as defined in the claims appended hereto.

Motor idle running protection device is prevented to bilge well is applicable to sewage collecting tank drainage, automatic opening of bilge well motor is opened and is stopped and adopt the high low water level control of ball-cock assembly, can't the return to the bilge well ball-cock assembly, lead to motor idle running phenomenon, utilize induction type water level controller to replace the ball-cock assembly earlier, induction type water level controller opens through the high low control motor of water level in the response sump pit and stops, but because induction type water level controller belongs to and exposes the induction point, quality of water is more complicated in the bilge well, when the water level reduces to low water level, sewage still remains on the induction point surface, lead to the inductor can not correctly the perception water level height, be unfavorable for opening of water pump motor and stop control. The electrical specialty of the engineering department is studied seriously, and the following control device is designed, so that the aim of preventing the motor from idling in the sewage well is fulfilled:

the motor idling prevention protection device for the sewage well; the low-water-level switch power supply comprises a low-water-level ball float valve, a water pump motor, an electric contact pressure gauge, a time relay, an intermediate relay, a main contactor, a ball float valve low-water-level switch power supply and a control loop power supply; it is characterized in that: the low-water-level ball float valve is arranged in the sewage well, one end of a switch of the low-water-level ball float valve is connected with a control loop power supply, and the other end of the switch of the low-water-level ball float valve is connected with a normally open contact and a normally closed contact incoming line end of the intermediate relay; one end of the electric contact pressure gauge is connected with the low water level switch power supply of the float valve in parallel, and the other end of the electric contact pressure gauge is connected with a coil incoming line end of the intermediate relay; the power end of the coil of the intermediate relay is connected with the outlet end of the electric contact pressure gauge, and the other end of the coil of the intermediate relay is connected with a commercial power zero line; one end of the normally closed contact of the intermediate relay is connected to the outlet end of the low-water-level ball float valve, and the other end of the normally closed contact of the intermediate relay is connected to a coil of the time relay and a time relay time-delay disconnection normally closed contact inlet end; one end of the normally open contact of the intermediate relay is connected to the outlet end of the low-water-level ball float valve, and the other end of the normally open contact of the intermediate relay is connected to the outlet end of the delay relay for delaying the opening of the normally closed contact; one end of the time relay coil is connected with a normally closed contact outlet end of the intermediate relay, and the other end of the time relay coil is connected with a commercial power zero line; one end of the time relay time-delay disconnection normally closed contact is connected to the normally closed contact wire outlet end of the intermediate relay, and the other end of the time relay time-delay disconnection normally closed contact is connected to the wire inlet end of the main contactor coil; one end of the main contactor coil is connected with a time relay to delay and break a normally closed contact outlet end, and the other end of the main contactor coil is connected with a commercial power zero line; one end of a main contact of the main contactor is connected with a mains supply, and the other end of the main contact is connected with a water pump motor; the relay coil is connected with the electric contact pressure gauge in series, the low-water-level floating ball valve switch is connected with the electric contact pressure gauge in parallel, the low-water-level floating ball valve switch, the intermediate relay normally closed contact, the time relay time-delay disconnection normally closed contact and the main contactor coil are connected in series, the intermediate relay normally open contact is connected with the intermediate relay normally closed contact in parallel, and the time relay time-delay disconnection normally closed contact is connected with the time relay coil in parallel.

The utility model discloses replacing former ball-cock assembly control switch with induction type water level controller, opening at the water pump motor is automatic to open and stop and add the electric contact pressure gauge in the return circuit, electric contact pressure gauge can utilize opening of interior water pressure control motor of pipeline to open and stop, carries out interlocking control through electric contact pressure gauge and ball-cock assembly low water level switch, when water pump motor can not normally fall and close when low water level ball-cock assembly, electric contact pressure gauge can reduce the motor that in time stops through perception pipeline water pressure. The motor idling prevention protection device for the sewage well is not complex in structure, and is formed by connecting a relay and an electric contact pressure gauge in parallel in a control loop to control a power supply of a main contactor of a water pump motor, so that the power supply of the motor can be reliably cut off, and the motor is protected.

The utility model discloses the theory of operation is simple, utilizes electric contact manometer height point, normally opens, normally closed point with time delay relay is connected, reduces to electric contact manometer limit point when pipeline pressure, and the disconnection of main contactor contact cuts off the power, and the protection motor, the power back of cutting off, time delay relay contact point delay is closed, resumes former control circuit state to reliably protect motor idle running damage motor.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (1)

1. The motor idling prevention protection device for the sewage well; the low-water-level switch power supply comprises a low-water-level ball float valve, a water pump motor, an electric contact pressure gauge, a time relay, an intermediate relay, a main contactor, a ball float valve low-water-level switch power supply and a control loop power supply; it is characterized in that: the low-water-level ball float valve is arranged in the sewage well, one end of a switch of the low-water-level ball float valve is connected with a control loop power supply, and the other end of the switch of the low-water-level ball float valve is connected with a normally open contact and a normally closed contact incoming line end of the intermediate relay; one end of the electric contact pressure gauge is connected with the low water level switch power supply of the float valve in parallel, and the other end of the electric contact pressure gauge is connected with a coil incoming line end of the intermediate relay; the power end of the coil of the intermediate relay is connected with the outlet end of the electric contact pressure gauge, and the other end of the coil of the intermediate relay is connected with a commercial power zero line; one end of the normally closed contact of the intermediate relay is connected to the outlet end of the low-water-level ball float valve, and the other end of the normally closed contact of the intermediate relay is connected to a coil of the time relay and a time relay time-delay disconnection normally closed contact inlet end; one end of the normally open contact of the intermediate relay is connected to the outlet end of the low-water-level ball float valve, and the other end of the normally open contact of the intermediate relay is connected to the outlet end of the delay relay for delaying the opening of the normally closed contact; one end of the time relay coil is connected with a normally closed contact outlet end of the intermediate relay, and the other end of the time relay coil is connected with a commercial power zero line; one end of the time relay time-delay disconnection normally closed contact is connected to the normally closed contact wire outlet end of the intermediate relay, and the other end of the time relay time-delay disconnection normally closed contact is connected to the wire inlet end of the main contactor coil; one end of the main contactor coil is connected with a time relay to delay and break a normally closed contact outlet end, and the other end of the main contactor coil is connected with a commercial power zero line; one end of a main contact of the main contactor is connected with a mains supply, and the other end of the main contact is connected with a water pump motor; the relay coil is connected with the electric contact pressure gauge in series, the low-water-level floating ball valve switch is connected with the electric contact pressure gauge in parallel, the low-water-level floating ball valve switch, the intermediate relay normally closed contact, the time relay time-delay disconnection normally closed contact and the main contactor coil are connected in series, the intermediate relay normally open contact is connected with the intermediate relay normally closed contact in parallel, and the time relay time-delay disconnection normally closed contact is connected with the time relay coil in parallel.

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