Patent Publication Number: US-2013243578-A1

Title: Pipeline Pump with Thermal Protection

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a pipeline pump technology, and more particularly to a pipeline pump with thermal protection capable of protecting the pump body under a situation that the pipeline pump is overheated. 
     2. Related Art 
     In daily life, during use of a water pump, it is often required to mop the floor with water. When there is much water, much labor is required. There is a water pump like a dust collector which sucks water on the floor to dry the floor. An impeller is rotated at a high speed by using a motor, a negative pressure is generated at a water inlet, and the water flows to the place at a low pressure, so that the water is sucked into a pipeline pump. Under a situation of normal use, the water pump may cool the impeller and the pump body by using the sucked water. However, when the water is pumped completely, there is no water to cool the pump body and the impeller, and after the water in the chamber of the pump body is evaporated completely, the temperature of the pump body rises very quickly. At this time, if there is no thermal protection, the impeller will be damaged in dozens of seconds to several minutes. 
     SUMMARY OF THE INVENTION 
     The technical problem is solved by the present invention by providing a pipeline pump with thermal protection capable of stopping a water pump in time from working under a situation that a pump body is overheated. 
     The technical solution adopted by the present invention to solve the technical problem is: a pipeline pump with thermal protection, including a motor, where a handle is arranged on the motor, a pump body is arranged on a motor shaft, a water outlet and a water inlet are arranged on the pump body, an impeller is arranged inside the pump body, one side of the pump body is fixed and sealed with a pump cover, a temperature detecting device is fixed on the pump body, and the temperature detecting device is connected to a temperature control circuit board. 
     In order to be capable of achieving better effect in the thermally conductive aspect, and not to influence normal working of the pump, the pump body is made of a copper material, a blind hole is provided on the pump body, and the temperature detecting device is sealed on the pump body through a thermally conductive adhesive. 
     Another structure capable of achieving the thermally conductive effect is as follows, a copper insert is arranged between the pump body and the impeller, a blind hole is provided on the inside of the pump body, and the temperature detecting device is sealed on the pump body through a thermally conductive adhesive. 
     For convenience of mounting the pipeline pump, for convenience of mounting the temperature control circuit board and in order that the appearance does not appear swollen, a bracket is arranged below the motor, a temperature control box is arranged inside the bracket, the temperature control circuit board is mounted inside the temperature control box, and a temperature control box cover seals the temperature control box. 
     In order to be capable of better detecting the temperature, the temperature detecting device adopts a thermosensitive resistor. 
     Beneficial effects of the present invention are as follows: the thermosensitive resistor is adopted to monitor the temperature of the pump body and the impeller, and once the temperature of the copper pump body is excessively high, the circuit board outputs a signal to cut off the power source of the pipeline pump, and the pipeline pump stops rotating, so that the damage on the impeller caused by the excessively high temperature of the pump body and the impeller so as to be incapable of working normally can be effectively prevented. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will become more fully understood from the detailed description given herein below for illustration only, and thus are not limitative of the present invention, and wherein: 
         FIG. 1  is a schematic diagram of a disassembled structure according to the present invention; 
         FIG. 2  is a schematic structural diagram of a pump body according to the present invention; and 
         FIG. 3  is a schematic diagram of an assembled structure according to the present invention. 
     
    
    
     IN THE DRAWINGS 
     
         
           1 . Cross recess head screw 
           2 . Pump cover 
           3 . Pump body seal gasket 
           4 . Impeller 
           5 . Pump body 
           6 . Temperature detecting device 
           7 . Blind hole 
           8 . Framework oil seal 
           9 . Water thrower 
           10 . Motor 
           11 . Bracket 
           12 . Temperature control box 
           13 . Temperature control circuit board 
           14 . Temperature control box cover 
           15 . Rubber foot pad 
           16 . Handle 
           5 - 1 . Water inlet 
           5 - 2 . Water outlet 
           10 - 1 . Motor shaft 
       
    
     DETAILED DESCRIPTION OF THE INVENTION 
     As shown in  FIG. 1 ,  FIG. 2  and  FIG. 3 , a pipeline pump with thermal protection includes a motor  10 , a handle  16  is arranged on the motor  10 , a pump body  5  is arranged on a motor shaft  10 - 1 , a water outlet  5 - 2  and a water inlet  5 - 1  are arranged on the pump body  5 , an impeller  4  is arranged inside the pump body  5 , one side of the pump body  5  is fixed and sealed with a pump cover  2 , a temperature detecting device  6  is fixed on the pump body  5 , and the temperature detecting device  6  is connected to a temperature control circuit board  13 ; the pump body  5  is made of a copper material, a blind hole  7  is provided on the pump body  5 , and the temperature detecting device  6  is sealed on the pump body  5  through a thermally conductive adhesive; a bracket  11  is arranged below the motor  10 , a temperature control box  12  is arranged inside the bracket  11 , the temperature control circuit board  13  is mounted inside the temperature control box  12 , and a temperature control box cover  14  seals the temperature control box  12 ; the temperature detecting device  6  adopts a thermosensitive resistor. The pump cover  2  seals the pump body through a cross recess head screw  1  and a pump body seal gasket  3  therein, and the motor shaft  10 - 1  prevents water from entering the motor  10  through a framework oil seal  8  and a water thrower  9 . A rubber foot pad  15  is arranged at the bottom to prevent or alleviate vibration. 
     The thermosensitive resistor is embedded into the blind hole of the copper pump body through the thermally conductive adhesive. When the temperature is excessively high, the power source of the pipeline pump is cut off in time, to protect the impeller from being damaged; and the circuit board is arranged in the bracket below the motor, so the pipeline pump does not appear swollen. 
     The above description is merely a specific application example, but is not intended to impose any limitation on the protective scope of the present invention. Any technical solution in the form of equivalent replacement or equivalent transformation falls within the protective scope of the claims.