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:How do construction suspension scaffolding be handled in the people's elevator?
Suspension of steel and steel is used to avoid the elevator, and it is OK to encrypt it on both sides of the elevator
Q:What is the safety device for construction elevator?
A lot of 1, anti-drop safety device 2, upper and lower limit 3, extreme limit 4, buffer spring 5, line door limit switch Single line door limit switch 7, ceiling switch 8, enclosure door lock 9, single door lock The door lock is on and off There are also many electrical safety protections
Q:How to set up the construction elevator?
Direct contact with the elevator company, and they give you a plan for the construction of a pre-buried piece, and the parameters of each elevator are different,
Q:When building tall buildings, the machine that USES to lift concrete to wait for tall building
It should be the ground pump, the center is the tower crane, the construction face is the concrete pump of the cloth machine to the construction method. The advanced cloth machine is the arm bracket of the pump car, can operate with the remote control, is as convenient as the pump car.
Q:Safe use of construction elevator
In the case of passenger and carriage, the loading shall be uniformly distributed, and the overload shall be strictly prohibited. When the elevator runs to the top and lowest levels, it is strictly forbidden to stop at the collision or lower limit. 7. The driver for leaving hanging basket and while going off work, should be hanging basket fell to the ground, to cut off the total power supply, and the door is locked point, prevent other undocumented workers start the hoisting cage without authorization. Wind up above 6, should stop using the elevator and bring the cage down to the ground. There must be good protection on both sides of the transportation channel. Floor door should be in a normally closed state, its height should conform to the requirements of the specification, anyone shall not open or head out of the door, when the floor door open, the driver shall not start the elevator. Ensure that the communication device is in good condition and the driver should be able to start the lift after confirming the signal. The driver should immediately execute any emergency stop signal on the floor of the operation. The elevator should be installed on a separate ground protection and lightning protection device. It is strictly forbidden to do maintenance work under the condition of the elevator. If maintenance is required, the power supply must be cut off and the sign of "check in, shut off" will be hung in a prominent place.
Q:How is the construction elevator installed
The construction elevator should choose a good position first, do the elevator foundation, at the same time make the wall in the setting process. This one has the corresponding elevator basic drawing, should the professional personnel carry on setting up and disassembling.
Q:Safety device for construction elevator
Many 1, 2, upper and lower limit for safety device 3 TDD, extreme limit 4, buffer spring 5, has threshold position switch, single threshold position switch 7, 6 top and limit switch 8 TDD, enclosure door lock 9, lock line 10, has locks There are a lot of electrical safety protection
Q:The construction elevator should have those procedures
Installation and demolition plan, content can guide safe construction, and have complete approval procedure. The installation and demolition of the team must hold the certificate of safety of the above provincial competent authorities. There should be substantial content for the safety of the installation, the demolition of the staff and the safety technology of the driver. Should have basic design, hidden acceptance and concrete strength speech. The inspection and acceptance of the installation completed and the inspection presentation of the competent part. The construction elevator has a record. The elevator is using a copy of the original copy. An employee's special course post certificate. Other relevant safety information. The construction elevator is a larger vertical transport equipment, and the safety and blood lessons of previous accidents are profound. Strict inspection, the key prevention of elevator accidents, is the key link of the safety management at the construction site, and the safety management staff at all levels should be awake and familiar.
Q:Can a construction elevator use a single cage
The construction elevator is designed to solve the construction machinery that can not be carried by the dragon door frame. Dual-use is the biggest feature of the construction elevator.
Q:How does the construction elevator add up
You can use a ready-made high-altitude operating platform and a high-altitude working platform

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