Combined sump pump with a backup pump structure

Abstract

A combined sump pump with a backup pump structure includes a primary pump, a check valve device for the primary pump, a pipeline connection device arranged on one side of the primary pump and the backup pump, a backup pump, and a check valve device for the backup pump; the primary pump and the pipeline connection device are connected by the check valve of the primary pump, the backup pump and the pipeline connection device are connected by the check valve of the backup pump; the primary pump is equipped with a primary pump float switch, a primary pump float ball is provided under the primary pump float switch, a backup pump hoop is provided on the pipeline connection device, a backup pump float switch is provided on the backup pump hoop, and a backup pump float ball is provided under the backup pump float switch.

What is claimed is: 
     
         1 . A combined sump pump with a backup pump structure, comprising a primary pump, a check valve device for the primary pump, a set of pipeline connection device, a backup pump, and a check valve device for the backup pump; wherein the pipeline connection device is arranged on one side of the primary pump and the backup pump; wherein the primary pump and the pipeline connection device are connected by the check valve of the primary pump; wherein the backup pump and the pipeline connection device are connected by the check valve of the backup pump; wherein the primary pump is equipped with a primary pump float switch; wherein a primary pump float ball is provided under the primary pump float switch; wherein a backup pump hoop is provided on the pipeline connection device; wherein a backup pump float switch is provided on the backup pump hoop; and wherein a backup pump float ball is provided under the backup pump float switch; wherein the check valve device for the backup pump comprises an elbow pipe, two ends of the elbow pipe are respectively provided with a backup pump pipe joint and a backup pump joint; wherein the check valve device for the primary pump comprises a valve body, two ends of the valve body are respectively provided with a primary pump joint and a primary pump pressure joint. 
     
     
         2 . The combined sump pump with a backup pump structure according to  claim 1 , characterized in that the backup pump comprises a pump housing, wherein a diffuser is arranged at the lower part of the pump housing, a DC motor is arranged inside of the pump housing, an impeller is arranged under the DC motor, and wherein the impeller is connected to the DC motor and being driven thereby, a skeleton oil seal is arranged between the impeller and the DC motor, a flange is disposed on the side of the skeleton oil seal, and an outlet formed at the top of the pump housing. 
     
     
         3 . The combined sump pump with a backup pump structure according to  claim 1 , characterized in that a backup pump compression pipe is provided on the outer wall of the backup pump joint, a backup pump rubber seal ring is provided on the inner wall of the backup pump joint, a backup pump metal clip ring is arranged on one side of the backup pump rubber seal ring and located inside of the elbow pipe, a valve flapper is arranged inside of the elbow pipe, and a curved nozzle is arranged on the outer wall of the elbow pipe. 
     
     
         4 . The combined sump pump with a backup pump structure according to  claim 1 , characterized in that a primary pump compression pipe is provided on the outer wall of the primary pump connector, a primary pump rubber seal ring is provided on the inner wall of the primary pump connector, a primary pump metal clip ring is arranged below the primary pump rubber seal ring, and a check valve plate is provided inside of the valve body. 
     
     
         5 . The combined sump pump with a backup pump structure according to  claim 1 , characterized in that at least one floating ball of the primary pump is provided. 
     
     
         6 . The combined sump pump with a backup pump structure according to  claim 1 , characterized in that an internal cavity is arranged between the DC motor and the pump housing. 
     
     
         7 . The combined sump pump with a backup pump structure according to  claim 1 , characterized in that the backup pump inlet is higher than the primary pump inlet. 
     
     
         8 . The combined sump pump with a backup pump structure according to  claim 1 , characterized in that the backup pump is a type of axial flow structure or a type of centrifugal structure. 
     
     
         9 . The combined sump pump with a backup pump structure according to  claim 1 , characterized in that the pipeline connection device being three-way straight pipes. 
     
     
         10 . The combined sump pump with a backup pump structure according to  claim 1 , characterized in that the installation position of the backup pump float switch is higher than the activation water level of the primary pump float switch.