CN213113401U - Encoder heat preservation device - Google Patents

Abstract

The utility model relates to an encoder heat preservation device, including round steel bar, support bar, companion tropical, inoxidizing coating, high temperature detection temperature detect switch, low temperature detection temperature detect switch, power binding post, support, control circuit. The device can ensure the working temperature of the encoder, accurately feed back the actual running speed of the motor and ensure the stable operation of the converter in tilting.

Description

Encoder heat preservation device

Technical Field

This patent application belongs to metallurgical technology auxiliary assembly technical field, and more specifically says, relates to a metallurgical molten steel equipment heat retaining device, especially relates to an encoder heat preservation device.

Background

Converter steelmaking is a smelting process that uses scrap steel, molten iron and ferroalloy as raw materials and is completed in a converter by chemical reaction among molten iron components and heat generated by the molten iron. In recent years, higher efficiency, higher quality and higher electrical control levels have become the most interesting issues for steel plants, with steel production already meeting demand. The converter has a vertically upward furnace mouth during steel making, has a certain inclination during molten iron charging and steel tapping, is driven by 4 alternating-current variable-frequency asynchronous motors, adopts a suspension mode of sharing 1 gear box by 4 points, utilizes a torsion bar device to distribute torque load, and meets the requirement of 360-degree rotation of a converter body according to the specification of a steel making process.

The speed setting of the active device is that the STEP-7PLC is set according to the process requirement, and carries out the vector control of the speed closed loop according to the speed signal fed back by the encoder arranged on the motor shaft. The torque component is resolved from the output of the speed regulator and is sent to the torque regulators of the other frequency conversion devices as a torque given source, so that the consistency of actual torque given of 4 motors is ensured, the load balance control is met, and the dynamic response and the control precision of the system speed are ensured by the speed closed-loop control of the active device.

The river steel bearing steel is located in the northern cold area, and the outdoor temperature reaches-25 ℃ in winter. When the working environment temperature of the encoder is lower than minus 10 ℃, the counting of the encoder is inaccurate, and the speed signal fed back by the encoder arranged on the motor shaft is inaccurate, so that the tilting control fault is caused, and the steelmaking production of the converter is influenced. Therefore, a device for ensuring the temperature of the working environment of the encoder, namely an encoder heat preservation device, is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the encoder working environment is low in temperature, the encoder can not work normally and is a self-designed encoder heat preservation device, and the purpose of stable transportation of a converter control system is achieved.

In order to solve the above problem, the utility model discloses the technical scheme who adopts is:

the utility model provides an encoder heat preservation device, including two round steel strips of winding into the ring, transversely set up a plurality of support bars between two round steel strips, the heat tracing band of longitudinal winding on the support bar, the setting is at the inoxidizing coating of heat tracing band surface, the setting is at inside high temperature detection temperature detect switch and the low temperature detection temperature detect switch of inoxidizing coating, the heat tracing band leaves power binding post, the frame is constituteed to round steel strip and support bar, frame one side shutoff, the shutoff of opposite side is not, the frame side of not plugging is provided with the support that is connected with the motor.

The power supply wiring terminal is connected with the control circuit, the control circuit comprises a 220V power supply, a main power supply switch, a control power supply switch, a contactor auxiliary contact, a contactor coil, a contactor and a heat preservation device outgoing line cable, wherein the power supply wiring terminal is connected with the contactor through the heat preservation device outgoing line cable, the contactor is connected with the 220V power supply through the main power supply switch, the positive electrode of the contactor is sequentially connected with a high-temperature detection temperature control switch, a low-temperature detection temperature control switch and the negative electrode of the contactor after the contactor coil through the control power supply switch, and the low-temperature detection temperature control switch is connected with the contactor auxiliary.

The utility model discloses technical scheme's further improvement lies in: the diameter of the round steel bar is 4mm, the diameter of a ring formed by winding the round steel bar is 140mm, and the distance between the two rings is 200 mm.

The utility model discloses technical scheme's further improvement lies in: the protective layer is made of glass fiber cloth.

The utility model discloses technical scheme's further improvement lies in: the support is an L-shaped support.

The utility model discloses technical scheme's further improvement lies in: the protective layer is disposed on the entire surface of the heat tracing band, or a part of the surface.

Since the technical scheme is used, the utility model discloses the beneficial effect who gains is: the encoder heat preservation device can guarantee the working temperature of the encoder, accurately feed back the actual running speed of the motor, guarantee the stable operation of the tilting of the converter, and has the characteristics of simple structure and convenience in assembly.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the connection of the control circuit of the present invention;

FIG. 3 is a schematic view of the structural assembly of the present invention;

wherein: 1. the device comprises a power supply terminal, 2, a heat tracing band, 3, a round steel bar, 4, a high-temperature detection temperature control switch, 5, a low-temperature detection temperature control switch, 6, a protective layer, 7, a support, 8, a support bar, 9 and 220V power supplies, 10, a main power supply switch, 11, a control power supply switch, 14, a contactor auxiliary contact, 15, a contactor coil, 16, a contactor, 17 and a heat preservation device lead-out cable, 19, a motor, 21, an encoder, 22, a shaft, 23 and a screw.

Detailed Description

The present invention will be described in further detail with reference to examples.

The utility model discloses an encoder heat preservation device, see fig. 1-fig. 3, round steel bar 3 including two wound rings, transversely set up a plurality of support bars 8 between two round steel bar 3, the vertical companion torrid zone 2 of winding on support bar 8, the inoxidizing coating 6 of setting at 2 surfaces in the companion torrid zone, the setting is at the inside high temperature detection temperature detect switch 4 of inoxidizing coating 6 and low temperature detection temperature detect switch 5, companion torrid zone 2 leaves power binding post 1, round steel bar 3 and support bar 8 constitute the frame, frame one side shutoff, the opposite side is not the shutoff, the frame is not the shutoff side and is provided with the support 7 that is connected with motor 19.

Power connection terminal 1 is connected with control circuit, control circuit includes 220V power 9, main power switch 10, control power switch 11, contactor auxiliary contact 14, contactor coil 15, contactor 16, heat preservation device lead-out wire cable 17, wherein power connection terminal 1 passes through heat preservation device lead-out wire cable 17 and connects contactor 16, contactor 16 connects 220V power 9 through main power switch 10, contactor 16's positive pole still connects gradually high temperature detection temperature detect switch 4 through control power switch 11, low temperature detects temperature detect switch 5, connect contactor 16's negative pole behind contactor coil 15, low temperature detects temperature detect switch 5 and still parallelly connected contactor auxiliary contact 14.

During manufacturing, the diameter of the round steel bar 3 is 4mm, the diameter of a ring formed by winding the round steel bar 3 is 140mm, the distance between the two rings is 200mm, the protective layer is 6 glass fiber cloth, and the support 7 is an L-shaped support. The protective layer 6 may be provided on the entire surface of the heat trace tape 2 or on a part of the surface of the heat trace tape 2, as shown in fig. 1.

Then, an encoder 21 is attached to the right side of a shaft 22 of the motor 19, and an encoder heat-insulating device is fixed to the motor 19 by screws 23 and covers the outside of the encoder 21 to form a closed heat-insulating space.

When the device is used, the main power switch 10 and the control power switch 11 are switched on, when the environmental temperature is lower than the set value of the low-temperature detection temperature control switch 5 by 15 ℃, the low-temperature detection temperature control switch 5 is switched on, the contactor coil 15 is electrified, the contactor 16 is switched on, the auxiliary contact 14 of the contactor is switched on, the control circuit forms self protection, the contactor coil 15 is always in an electrified state, and the heat preservation device is in a heating state. When the environment temperature is 25 ℃ higher than the set value of the high-temperature detection temperature control switch 4, the high-temperature detection temperature control switch 4 is switched off, the contactor coil 15 is de-energized, the contactor 16 is switched off, and the heat preservation device is in a heat preservation state. When the environmental temperature is lower than the set value of the low temperature detection temperature control switch 5 by 15 ℃, the process is repeated.

The device is used for manufacturing the heat preservation device according to the actual application condition on site, and the heat preservation equipment is matched with the heat preservation device for use. Easy to manufacture and install, low in cost and good in heat preservation effect.

Claims (4)

1. An encoder heat preservation device which characterized in that: the device comprises two round steel bars (3) wound into a circular ring, a plurality of support bars (8) transversely arranged between the two round steel bars (3), a heat tracing band (2) longitudinally wound on the support bars (8), a protective layer (6) arranged on the outer surface of the heat tracing band (2), a high-temperature detection temperature control switch (4) and a low-temperature detection temperature control switch (5) arranged in the protective layer (6), wherein a power supply wiring terminal (1) is reserved on the heat tracing band (2), the round steel bars (3) and the support bars (8) form a frame, one side of the frame is blocked, the other side of the frame is not blocked, and a support (7) connected with a motor (19) is arranged on the side of the frame;

power binding post (1) is connected with control circuit, control circuit includes 220V power (9), main power switch (10), control power switch (11), contactor auxiliary contact (14), contactor coil (15), contactor (16), heat preservation device extraction line cable (17), wherein power binding post (1) is through heat preservation device extraction line cable (17) connection contactor (16), contactor (16) are through main power switch (10) connection 220V power (9), the positive pole of contactor (16) still connects gradually high temperature detection temperature detect switch (4) through control power switch (11), low temperature detection temperature detect switch (5), the negative pole of contactor coil (15) back connection contactor (16), low temperature detection temperature detect switch (5) still parallel connection has contactor auxiliary contact (14).

2. The encoder thermal insulation device of claim 1, wherein: the diameter of the round steel bar (3) is 4mm, the diameter of a ring formed by winding the round steel bar (3) is 140mm, and the distance between the two rings is 200 mm.

3. The encoder thermal insulation device of claim 2, wherein: the protective layer (6) is made of glass fiber cloth.

4. The encoder thermal insulation device of claim 3, wherein: the bracket (7) is an L-shaped bracket.

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