elevator parts low cost load cellType EWD-H-SJ3 Elevator Load Weighing Device

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Product Description:


Elevator parts  low cost load cell
Type EWD-H-SJ3 Elevator Load Weighing Device

SYSTEM INTRODUTION

l This system is applicable to all elevators with movable platform car (containing 3-channel programmable switch signals)

l Main characters:

1. Contactless inductive working mode, solid state relay output, no need to fix the original position of elevator overload switch, and to change structure of elevator platform car.

2. Overall water resistant design: small size, easy installation, simple structure.

3. Wide inductive range, high precision positioning, wide range working temperature of intelligent temperature compensation.

4. Kernel is made of high precision Holzer sensor and high-performances microcomputer. Set up all working parameters on the spot.

5. Programmable control no-load auto zero capacity.

6. Output interface of analog voltage can improve elevator operation capacity when cooperating with elevator speed control.

7. Adopt strong inductive magnet, improve the anti-jamming ability to the utmost.

8. Each set of products has been strictly handled with aging treatment so as to assure its reliability.

9. System carry scientifical computing out according to mathematical equations to automatically amend detention of error.

10. It is totally convenient to adjust on the pot by means of artificial self-study or artificial displacement.

11. Control method of programmable output signal created by ourself is applicable to all kinds of traction elevator with movable platform car.

Technical index

1

Scope of application

Applicable to all elevators with movable platform car. range of auto-detention (2.0mm car bottom displacement10.00mm ); range of manual set displacement: 2.5~9.9mm ( relate to parameter PD)

2

sensitivity

Rated load /200 (5.0kg when rated load is 1 ton)

3

System error

1.5% ( 5~40)

Working temperature range3.0%

4

nonlinearity

1.0%

5

Output form

Solid state relay

Programmable universal signal

① 3 channel programmable output mode are following: no- load, light- load, semi-load, heavy load, rated load and overload (user can freely set up the range of change.

② Each channel can be programmed as dynamic close or dynamic break contact.

③ Contact capacity: DC/AC 32V/15mA

Elevator load "no load~rated load", analog quantity:0~10Vlinearly changing

6

Storage environment

-25~75

7

Working environment

Temperature:-20~55

8

Relative humidity

20%~99%RH

9

Reaction time

0.25s

10

Power supply

AC/DC2410%V/150mA

11

Installation position

movable platform car of elevator

12

Machine dimension

45X45X903

l Working principle

Referring to diagram, by means of Holzer sensor this system tests displacement changing based on platform car of elevator and load elastic variation principle. It use single chip microcomputer to scientifically compute to correct error in terms of given parameter and measuring results based on mathematic equations, which accomplish effective load weighing of the elevator platform car.

l EWD-H-SJ3 TESTING LOAD OF INDUCTIVE ELEVATOR

  Appearance & interior structure

l Function comparison with other load weighing devices

EWD-H-SJ3

Other weighing devices

Working principle

Adopting Holzer sensor. Accomplishing contactless inductive working.

Advantages:

① Has long working life in that this system don't bear load of elevator.

② Width induction & high positioning precision.

③ No system damage arising from insufficient overload capacity and mechanical vibration.

④ Micro sensor & microcomputer make system highly intelligent and lower power waste.

⑤ Automatically amending detection error by means of digital. Good linearity.

Directly bear elevator load by the way of pressure sensor.  

Installing method

Only need to fasten the device in the middle of bottom of platform car or original position of mechanical switch in the condition of failure to change structure of platform car. Small size & Easy installation.

Need to change structure of  the platform car. Uneasy to install & more work.

Adjusting on the pot

① Thanks to the high intelligence personnel may complete adjustment of elevator weighing device on the spot after separately press the button of sensor two times following the completion of installation system sensor when elevator is no load or rated load.

② Elevator producer may directly complete quick adjustment of similar elevator by the way of setting-up the manual displacement.

Advantages: easy & quick to adjust

Complicated adjustment owing to the analog signal.

Connecting the interface of output signal on the select layer device

3-channel programmable output terminal could be set up by user themselves. Selection: no load, light load, semi-load, heavy load, rated load, overload; 0~10V analog output. It is convenient for user to finalize the items below: 1 vandal resistant function. 2 full bypass function. 3 energy saving function. 4 debugging system torque compensation.

Single function

Economic analysis

① High-performance to price ratio, easy to use, low breakdown.

② Less accessories, low additional cost & simple processing

Average

High additional cost

l Any information needed, please ask for the operation manual from us.  


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Q:What is the safety device for construction elevator?
Safety guard, safety hook, safety switch (limit switch, limit switch, break cord switch), braking system, overload protection device etc.
Q:How many floors do you need to install a construction elevator?
Do not have a regulation, as long as the benefit construction organization, installation does not install construction lift machine all can. It should be explained that the construction elevator has manned and pure cargo. Note: the installation of the construction elevator is required before the installation of the local quality and technical supervision bureau. After the installation, the safety record is made in the safety record in the use of the safety record.
Q:The calculation of the use of electricity in the construction elevator
Use electricity in the field (1) lifting equipment class: tower crane 2, construction elevator 3; According to the table, K = 0.3 cos phi = 0.7 tg phi = 1.02 JC = 40% (temporary load) Pe = 2 times 63 + 3 times 11 = 159 (kW) And then power: PS = 2 times Pe = 2 times 159 = 201 (kW) Pjs1 = K * PS = 0.3 * 201 = 60.3 (kW) Qjs1 = tg phi by Pjs1 = 1.02 times 60.3 = 61.5 (kVA)
Q:Why is the construction elevator not so close to the structure?
The country stipulates that the distance between the moving parts of the elevator and the building and the fixed construction equipment should not be less than 0.25 meters. It's mainly about safety.
Q:The construction elevator can not operate during the use of several stages of wind power
Well, there are no definite rules. It's up to you to decide whether to use it or not
Q:How many meters or how many layers should the construction elevator be installed?
Construction elevator is also called construction lifter, alias outdoor elevator or people dual-purpose ladder. The country is not clear how many meters or how many layer must be used, but in some coastal developed cities are now more than 30 meters using construction elevator, some cities also issued relevant rules more than 30 meters must use construction lifter, gantry and hoist is no longer used.
Q:The construction elevator can only go up can't come down what happened
Look at the contactor connectionThe drop contactor does not absorb
Q:Is there a specification requirement for the floor door of the elevator to the floor? How high
The door locks must be in the direction of the elevator, and the people on the floor are not allowed to move at will, only the driver will be able to move. The other is that the height of the door must be 1.8 meters high, so that the workers' heads don't reach out to the danger.
Q:The construction elevator is commonly used in the process of the project
For example, building construction is used for more than two floors
Q:There are differences between the construction elevator and the construction elevator
The principle is different, the construction elevator operates in the litter box. The elevators are short for construction elevators, which are very high in the safety and performance of large facilities that can be used on the site. The construction elevator should be a dual-use lifting device.

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