CN2786859Y - Shielding electric pump with overheat protection - Google Patents

Abstract

The utility model discloses a shielding electric pump with overheat protection. A stator winding [4] is arranged in a casing [1], and a junction box [5] is arranged on the casing [1]. The utility model is characterized in that a group of thermal switches [2] which are connected in series by a connecting wire [3] are arranged in the stator winding [4]. The utility model has the advantages that both ends of the connecting wire [3] are connected with a main coil of an alternating current contactor of a shielding electric pump, and an electric power supply line of a motor, burnt accidents of the shielding electric pump result from overheat and can be automatically controlled.

Description

A kind of shielded electric pump with overheat protection

Technical field

The utility model belongs to shield electric machine and pump is the shielded electric pump of one, particularly a kind of shielded electric pump with overheat protection.

Background technology

Be extensive use of shielded electric pump in industries such as chemical industry, light industry, food at present, owing to having good barrier propterty and adapt to various workplace, it is used widely, but, because this pump motor is through shielding, under the general environmental condition, its inner machine operation situation of understanding that can't be definite often owing to reasons such as phase shortage, overload heating can't in time be found, causes bearing and winding to burn and scrap.In order to address this problem, goal of the invention of the present utility model has been proposed.

Summary of the invention

According to the problem of above-mentioned existence, goal of the invention of the present utility model has been proposed.Be that goal of the invention of the present utility model provides a kind of shielded electric pump with overheat protection.The purpose of this utility model realizes according to following structure.This kind has the shielded electric pump of overheat protection, has stator winding [4] in housing [1], also has a terminal box [5] on the housing [1], it is characterized in that having in stator winding [4] inside one group of thermal switch [2] by lead [3] polyphone.The quantity of thermal switch [2] is 1 to 4.Its advantage is that the two ends with lead [3] are connected with the A.C. contactor main coil of shielded electric pump and the power supply line of motor, just can control shielded electric pump automatically because the overheated burnout failure that causes.

Description of drawings

Accompanying drawing 1 is the dismantle vertical view of end cap of electric pump of the present utility model, and accompanying drawing 2 is electrical wiring schematic diagrams, and accompanying drawing 3 is that the A of terminal box [5] of accompanying drawing 1 is to view.Sequence number in the accompanying drawings is described as: 1, housing, 2, thermal switch, 3, lead, 4, stator winding, 5, terminal box, 6, the stator winding lead-out wire, CJ1, A.C. contactor and contact thereof, QA, starting switch (button), TA, shutdown switch (button), U, V, W, powered wire.

Embodiment

Below in conjunction with the embodiment that provides in the accompanying drawing, structure of the present utility model and use are elaborated.With reference to accompanying drawing, this has the shielded electric pump of overheat protection, has stator winding [4] in housing [1], has screening arrangement between stator and rotor.Also have a terminal box [5] on the housing [1], distinguishing characteristics is to have in stator winding [4] inside one group of thermal switch [2] by lead [3] polyphone.The quantity of thermal switch [2] is 1 to 4, and many again meanings are also little.Thermal switch can adopt the thermoswitch thermistor for example with positive temperature characterisitic, also can use the magnetic thermoswitch with positive temperature characterisitic, perhaps uses BR series of heat protector.Two ends with lead [3] during use are connected in series with the A.C. contactor main coil of shielded electric pump and the power supply line of motor, just can control shielded electric pump automatically because the overheated burnout failure that causes.After winding [4] reached the temperature of thermal switch setting because of certain reason temperature rises, the thermal switch action disconnected, and A.C. contactor CJ1 is disconnected, and this moment, the shield electric machine outage stopped, and can adopt other measure warning simultaneously, reminded operating personnel's examination and maintenance.Cross thermal cutoff if not what fatal fault caused, then after temperature descends, thermal switch can auto-closing, and automatic energized can restart motor then, makes pump work.Adopt 5 binding post forms in the terminal box, three top lead-out wires that connect stator winding [6], two following series conductor [3] that connect thermal switch [2].

Claims (2)

1, a kind of shielded electric pump with overheat protection has stator winding [4] in housing [1], also have a terminal box [5] on the housing [1], it is characterized in that having in stator winding [4] inside one group of thermal switch [2] by lead [3] polyphone.

2, according to the described a kind of shielded electric pump with overheat protection of claim 1, the quantity that it is characterized in that said thermal switch [2] is 1 to 4.

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