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

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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:The working principle of construction elevator
How the elevator works: The main bearing structure is self-formed system, which is low on construction. It more driven by force, drive devices are installed on the hanging basket, through the gear and rack drive system, the mutual cooperation, so as to realize the rise and fall of the elevator.
Q:How does the elevator operate
One must first understand the basic structure of the elevator, function, operation and safety protection measures for each elevator, so each new elevator operation need to carefully look at elevator operation manual! 2 each elevator switches in eye-catching position, the first thing to know to control the power box, and stop buttons and effective protection switch, it is helpful for you in the process of operation, have safety emergency measures! 3 each elevator has the control box, it has indicated the direction and floor indicator, if your operation is simple and easy lift, it is not a lot of protection measures, only up to the threshold, sometimes may malfunction, press in operation had better stop, make sure someone wrong operation or accident happen! 4 as for how to increase the security of the original equipment and measures, can reach Ann and suzhou mechanical and electrical technology department contact, they have free professional technical support and solutions!
Q:Why is the construction elevator not up to the roof
The free end of the construction of the lift height is only 7.5 meters high, general construction elevator drive now is the case, so the hoisting cage height and drive around 4.5 meters high, the other national standard construction elevator ceiling limit moves, drive above about 1.8 meters away from the top of the rails. So it's the free end of the construction elevator that can't satisfy the roof. As long as they can set up effective adhesion measures, they can also get on the roof.
Q:What are the requirements for the construction elevator
The anti-drop safety device is an important part of the construction elevator, which can be relied on to eliminate the occurrence of the fall accident and guarantee the safety of the crew. So for safety device factory test is very strict, before delivery by the statutory inspection unit for torque measurement, critical speed measurement, measuring the amount of spring compression, each with the test report, after assembly to the construction lifter for drop test under rated load, and the site to use the elevator must be every three months to conduct a drop test. For safety device to the factory for two years for safety device (delivery date), must also be sent to the statutory inspection unit to carry on the test, after testing once a year. So far few inspection, some sites even once every three months to detect don't do drop test, all think that their is no problem for safety device, but once had an accident, repent at leisure. Why not do regular tests and tests? The use of units blindly thinks that not bad is good. Actually good or bad for safety device can only judge by test and inspection in the daily operation is not sure whether it is good or bad, for those who are serving for safety device, or advice for the earlier inspection and regular test, only accomplish know fairly well, to malignant accident prevention rather than cure.
Q:How do construction suspension scaffolding be handled in the people's elevator?
You need to transfer at the scaffold poling build-up on the cantilever beams, and one cargo lift scaffolding and scaffolding disconnect processing, so that not only is the stress problem, and is an outer layer removed, people transfer the general is still there, easy to keep people transfer at the shelf.
Q:Is the construction elevator the same as the construction elevator
Construction elevators are often called construction elevators, but construction lifts include a broader definition, and construction platforms are part of the construction elevator series. Simple construction elevator is by car, driving mechanism, standard section, attached to the wall, chassis, fence, electrical system and so on several parts, manned cargo construction machinery is a frequently used in construction, because of its unique enclosure structure make it take up both comfort and safety, construction elevator is usually used with tower crane on the construction site, the average load in 1-5 tons, running speed is 1 to 60 m/min.
Q:Can construction elevators be taken by people or by goods
The construction elevator can be taken either by person or by cargo Material hoist (dragon door frame, well frame) can be carried only, not by person
Q:What is the main function of elevator motherboard?
A control system includes light, machine, electric, calculate, calculate the mainboard is mainly responsible for, the equivalent of the human brain, it gathers the elevator running status, corresponding analog signal output, control of elevator running properly and safely.
Q:What procedures and procedures will be required to re-use after the construction elevator overhaul?
Important parts replacement needs to be changed to the qualification, the procedure is like the new ladder, according to the new ladder standard test.
Q:The calculation of the use of electricity in the construction elevator
The full load is 7.5 KW. The output current is 4.2 A, is the converter 7.5 KW?

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