ZHB系列智能电动执行器

ZHB Series Intelligent Electric Actuator

ZHB Series Intelligent Electric Actuator (simply called actuator) is an Intelligent product manufactured on the basis of introducing H & B Corporation’s technology, which is applicable for all kinds of automatic process control system. It receives control signal from DCS system or positioning adjustment instrument and output shift of rotating angle and mechanical torque to control openings of various valve guards and adjust flow rate of liquid in process pipeline to realize automatic control of process parameters.

■Features

● It is compatible with 4-20mA DC analog signal and is in accordance with HART or digital signal from MODBUS

bus line communication protocol. Its structure is flexible, with s ● It is compatible trong applicability.

with active low voltage switching value (24V .DC) or passive switching value (dry contact) inpu ith integrated structure without another servo amplifier to simplify system structure. fe.

ith com y manual on site, with adjustment signal and valve position signal etc multi parameter disp as on contact with midway limit to ensure system safety.

h deviation, motor locking rotor and overheat etc m ive automatic identification, change of valve flow rate char t contact shift sensor, and with high s small volume and light weight, decreased by 1/3 compared to the same traditional product.

■ Main specifications

0mA DC, compatible with digital signal from HART bus communication DC or passive dry contact signal. 1% ent range 0.3% - 3% hen carrying out deviation warning, it can output warning ign

t.

● It is adopted w ● It has the features of Intelligent positioning, high accuracy and excellent damping characteristic. ● It has electric brake function, without mechanical brake and friction loss, and with a long service li ● It can be conveniently and rapidly carried out zero and range adjustment locally or remotely (product w munication function).

● It can be operated b lays.

● It h ● It has the functions including signal disconnection, too muc ulti failure diagnosis, warning and processing etc.

● It has the functions including active and react acteristic, and random flow rate characteristic curve that can be set by user.

● It has the capacity of digital filtering and strong anti-interference, withou reliability.

● It feature ● Adjustment signal input: 4-2protocol or MODBUS communication. ● Switching value input: active 24V ● Position feedback signal output: 4-20mA DC. ● Basic error: ±1.0% ● Return difference: ≤ ● Dead zone: ≤1%, adjustm ● Deviation warning door limit: 5% - 110%. W s al of close contact and make valve position remain at local or move to full open or full close position according to preset procedures. ● Midway limit: lower limit: 0% - 55%. Upper limit: 45% - 100%

● Signal disconnection or limit-exceeding protection: when adjustment signal or feedback signal is isco hanical failure to lock rotor or is ck rning contact capacity: dynamic close: 5A 220V AC. , output shift of actuator is linear relation ith ure sensor can carry out real time monitoring on site, perature -25 ℃- +75.℃ es not contain corrosive medium, and flammable and explosive upply: 220V ±10% 50Hz

T ent electric actuator is as follows:

Communication functions

) control;

M one without G eed not be marked. ator type

xample of marking: ZHB250 -25H means that the rated torque is 250Nm and rated stroke time is 25(s/90o), and

or specifications of ZHB actuator see table 1.

ecifications of ZHB Actuator No. Type

Ra ower

Weight (Kg)

d nnected or exceeds limit, it can output warning signal of clos

e contact and make valve position remain at local or move to full open or full close position according to preset procedures. ● Rotor-locking protection: when output shaft o

f actuator meets with mec lo ed, it can give out warnin

g signal of close contact and switc

h off motor current, and irregularly check whether locking failure is eliminated. After rotor-locking failure is eliminated, it can recover normal operation automatically. ●Failure wa ● Characteristic change of output stroke: under general condition w input signal, and can be set as equivalent percentage characteristic if necessary or 20-segment linear curve with different slope to adapt to special process requirement. ● Ambient temperature monitoring: Its built-in temperat and can give out warning contact signal when exceeding allowable range. ● Rated torque: 40 – 8000Nm (refer to table of specifications). ● Protection grade: IP65 ● Ambient condition: tem ● High temperature type: -25 ℃- +95.℃ ● Relative humidity: ≤95%, ambient air do substances. ● Power s ■ype and standard

Type system of ZHB Intellig Z H B □——□ □

H: with HART communication protocol ；

E: low voltage switching value (24V DC : with MODBUS bus communication, and communication function has no marking; : high temperature type.

Full stroke (S/90°), 25s n Rated torque (Nm) Intelligent type Lever type

Electric actu E it is an Intelligent electric actuator with HART communication function.

F Table 1 Sp te output Rated stroke time

Output p torque (Nm)

(s/90°)

(W)

1 ZHB40-10 □40 10

2 ZHB100-25□ 25

70

3 ZHB100-10□ 100

10 1

2050

4 ZHB250-25□ 25

5 ZHB250-10□ 250

10

6 ZHB600-25□ 600 25

300

7 ZHB800-25□ 800 25 330 8 ZHB600-10□ 600 10 66

9 ZHB1250-25□ 1250 25 10 ZHB1600-25□ 1600 25 600

88

11 ZHB2500-25□ 2500 25 700 95 12 ZHB4000-60□ 4000 60

750 350

13 ZHB6000-60□ 6000 60 1000 360 14 ZHB8000-60□ 8000 60 1300 400

Principle of operation

controller, drive motor, reducer and position transform 4 parts. Action and tuator see Fig.1. 4-20mA Dc adjustment signal from positioning instrument, after A/D nv e as follows:

, the system can carry out corresponding processing.

source of actuator, adopted with rare earth permanent magnet low speed synchronous oto ating planet speed-reducing drive mechanism with high efficient mechanical self-locking nc ntial transformer, proportionally converts mechanical change of output

■ ZHB electric actuator consists of principle of operation of each part is introduced as follows:

● Controller

For principle of ac co ersion, is compared to valve position signal in monolithic processor and then output corresponding switch signal to drive servo motor positively or negatively, and drive valve after mechanical speed-reducing conversion. Valve opening is detected and converted into voltage signal proportional to shift. This signal can be used for adjustment control after A/D conversion. In MPU, valve position signal, through various conversions, can convert stroke characteristic of valve. Actuator is classified into automatic or manual operation. In automatic operation, opening of valve position is controlled by adjustment input signal to trace adjustment signal in real time. In manual operation, opening of valve position is controlled by using manual button switch. Valve position signal, through conversion in MPU and then D/A or V/A conversion, will be outputted as 4 ~ 20mA DC signal to be used for system display and tracking control.

Failure diagnosis functions of actuator ar 1. Adjustment signal disconnection 2. Feedback signal disconnection 3. Rotor-locking of motor 4. Large deviation failure

When meeting with failure ● Drive motor

Drive motor is power m r, which improved operation reliability and positioning stability of drive motor to avoid failure of drive motor so that it can operate for a long time without adjustment.

● Reducer

Reducer has flo fu tion, which can convert high rotation speed and small torque motion outputted by drive motor into low rotation speed and large torque output to drive adjustment mechanism.

● Position transmitter

Position transmitter, through differe

shaft of actuator into electrical signal and inputs it to controller to be used for adjustment control of actuator. At the same time, it can be returned to control room for monitoring and management of the control room. This detector is provided with 2 limit micro switches to ensure safe operation. At the same time, it can output 2 groups of switching value signals for system control.

Fig.1 Diagram of Intelligent control principle

Fig.2 Function distribution of external connection terminal

■ Outside and installation size

unit:mm

No.

Type

A B C D E F

G H1

H2

H3

L 1φ

2φ

3φ

K

Key

1 ZHB40-10□

2 ZHB100-25□ 220 290130 152 111501203451342542011 35 16 1510×50

3 ZHB100-10□

4 ZHB250-25□ 260 290

100 152 126

50

120

345

134

25

420

13 35 16 21

10×50

5 ZHB250-10□

6 ZHB600-25□

7 ZHB800-25□ 320 365130 162 145601503651472545014 40 1

8 2312×60

88 ZHB600-10□ 9 ZHB1250-25□ 10 ZHB1600-25□ 11 ZHB2500-25□ 390 424180 212 119801704152103566014 58 20 2518×80

12 ZHB4000-60□ 460 520200 245 1321001855352804580022 80 30 3525×10013 ZHB6000-60□ 537 578270 320 1071002165402855580022 80 30 3525×10014 ZHB8000-60□

537 578

270 320 107

100

216

540

285

55

800

22 80 30 35

25×100