CN201146373Y - Internal connecting type automatic protection electric barrel - Google Patents

Abstract

An inner-connected automatic protection electrical roller comprises a cylinder and a motor in the cylinder, which is characterized in that: a winding of the motor is connected with a thermal protector in series, and the thermal protector is closely contacted with the winding. The thermal protector and the winding of the motor are fixed together for full contact, thus leading the thermal protector to fully and sensitively sense the temperature of the winding. Once the temperature of the winding of the motor exceeds the set temperature, the thermal protector cuts off the winding, the motor is switched off and stopped, and the cylinder stops the rotation. Two phases or three phases in the three-phase winding of the motor are connected with the thermal protector in series, and the thermal protector adopts a temperature switch. The inner-connected automatic protection electrical roller can effectively avoid the problem of damaging the roller due to the overheating of the motor caused by various reasons; the usage is simple and convenient, which is the same as the using method of the common electrical roller; various external protection circuits are unnecessary, only the motor of the roller can realize the automatic protection; the inner-connected automatic protection electrical roller can avoid a user disassembling the protector arbitrarily, which can cause potential safety hazard; the price is low and the occupying space is small.

Description

Internal connecting type is protected motorized pulleys automatically

Technical field

The utility model relates to a kind of internal connecting type and protects motorized pulleys automatically, is used for the conveyor drive arrangement field.

Background technology

Motorized pulleys have been widely used in all trades and professions, as the drive unit of equipment such as conveying machinery as a kind of novel driving device.Along with progress of science and technology, its application places also more and more widely in recent years.And as a kind of emerging drive unit, its reliability can be divided into machinery and motor two parts.Mechanical Reliability has reached substantially along with technological progress or has surpassed design objective.Because motor is installed in simplified inside in the motorized pulleys, so the motor radiating inclement condition.Because of causing motorized pulleys, injection flow deficiency, overload, phase shortage or other environment human factor regular meeting damage simultaneously.

In order to address these problems, people use various circumscribed electrical equipment, mechanical protection device, and are complicated but it uses, and trouble is installed, and cost an arm and a leg, and it is big to take up room.Be subject to environment for use and user's technical capability simultaneously.In reality is used, need not or not use the situation that causes cylinder to damage and account for the overwhelming majority that cylinder damages, wherein the damage of motor account for again wherein 98%.

The utility model content

For solving above deficiency of the prior art, the technical problems to be solved in the utility model is: provide a kind of internal connecting type to protect motorized pulleys automatically, can fully solve the problem that, overload few because of injection flow, phase shortage, improper use etc. cause motorized pulleys to damage.

The utility model solves its technical problem; the technical scheme that is adopted is: internal connecting type is protected motorized pulleys automatically; comprise the motor in cylindrical shell and the cylindrical shell, it is characterized in that: the windings in series of described motor has thermal protector, and thermal protector closely contacts with winding.

Thermal protector is fixed together with the motor winding and fully contacts, and makes thermal protector can respond to winding temperature fully delicately.In case electromotor winding temperature surpasses design temperature, then thermal protector disconnects winding, and the motor outage stops, and cylindrical shell stops the rotation.

Wherein preferred version is:

The thermal protector of connecting respectively in three phase windings of described motor.The thermal protector of also connecting in the two-phase therein.

Described thermal protector is a temperature switch.

Three phase windings of described motor can be wye connections, also can be Δ type connections.

By the temperature switch of in the winding of the motor of motorized pulleys, connecting, and make temperature switch fully contact, thereby make the temperature of temperature switch in can sensitive induction rotary drum electrical motor winding with winding.When, overload few when improper use, injection flow, phase shortage or other reason caused the rotary drum electrical motor winding temperature to be elevated to the operating temperature of temperature switch, temperature switch disconnected, and cut off the self-protection that stops operating of main power source motorized pulleys.

The utlity model has following effect: 1, can effectively avoid causing the problem of cylinder damage, prevent that effectively cylinder from damaging because of the motor overheating that a variety of causes causes.2, easy to use, identical with common electric cylinder using method.3, need not external various protective circuit, only the motor of cylinder just can be realized automatic protection.4, can avoid the user arbitrarily to remove protector, cause potential safety hazard.5, price low, take up room little.

Description of drawings

Fig. 1 is a motor winding wye connection schematic diagram of the present utility model;

Fig. 2 is a motor winding Δ type connection schematic diagram of the present utility model;

Among the figure, ST1-ST6 is the motor winding for temperature switch L1-L6.

Embodiment

Below in conjunction with the embodiment accompanying drawing the utility model is described further:

Motorized pulleys are known frame mode, and thermal protector---the temperature switch of connecting on the winding of motor, thermal protector closely contact with winding and be fixed together.

Be illustrated in figure 1 as the schematic diagram of motor wye connection winding.

Temperature switch ST1 connects with A phase winding L1, and temperature switch ST2 connects with B phase winding L2, and temperature switch ST3 connects with C phase winding L3, connects into wye connection then.

When motorized pulleys A phase phase shortage, B, C phase winding temperature raise rapidly.When temperature reached the operating temperature of temperature switch, temperature switch ST2 or temperature switch ST3 disconnected rapidly, cut off the electric power loop of B, C phase, made cylinder be protected.When the overload or other reasons cause three phase windings overheated, temperature switch ST1, ST3 deenergization loop make cylinder be protected.When the temperature reduction returned to working temperature, temperature switch resetted, and cylinder works on.

Also can omit ST2 among Fig. 1.

Be illustrated in figure 2 as the schematic diagram of motor Δ type connection winding.

Temperature switch ST4 connects with A phase winding L4, and temperature switch ST5 connects with B phase winding L5, and temperature switch ST6 connects with C phase winding L6, connects into Δ type connection then.

When motorized pulleys A phase phase shortage, winding L 6 temperature raise rapidly.When temperature was elevated to the operating temperature of temperature switch, temperature switch ST6 disconnected rapidly, cut off the electric power loop between B, the C phase.When motorized pulleys because of injection flow deficiency, overload, and other reasons is when causing the three-phase winding temperature to be elevated to operating temperature simultaneously, temperature switch ST4-ST6 disconnects rapidly, the loop of cutting off the electricity supply, motorized pulleys are protected automatically.

Claims (3)

1, a kind of internal connecting type is protected motorized pulleys automatically, comprises the motor in cylindrical shell and the cylindrical shell, and it is characterized in that: the windings in series of described motor has thermal protector, and thermal protector closely contacts with winding.

2, internal connecting type according to claim 1 is protected motorized pulleys automatically, it is characterized in that three phase windings of described motor have two-phase or three-phase to be in series with thermal protector.

3, internal connecting type according to claim 1 and 2 is protected motorized pulleys automatically, it is characterized in that described thermal protector is a temperature switch.

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