CN107043055A - A kind of uncharged elevator overload closing detecting apparatus - Google Patents

Abstract

The invention discloses a no-load elevator overload switch detection device, comprising: a fixed clamp block, a bracket, a trapezoidal screw rod, a movable clamp block, a pressure sensor and a driving device; the fixed clamp block and the bracket are used for supporting and Clamp the action plate at one end of the overload switch; the trapezoidal wire rod is set on the fixed clamping block and the bracket part, and drives the moving clamping block to move up and down when rotating; the moving clamping block is assembled on the trapezoidal On the screw rod, it is used to clamp the action plate at the other end of the overload switch; the pressure sensor is installed on the movable clamp block, and is used to measure the force on the action plate at the end of the overload switch clamped by the movable clamp block; The driving device is fixed on the fixed splint and the bracket, and is used for outputting torque and acting on the trapezoidal screw rod. The device provided by the invention is driven by a motor to apply analog force, which solves the time-consuming and labor-intensive problem of carrying weights during the overload switch detection process; and the structure is simple and portable, and is convenient to carry.

Description

A no-load elevator overload switch detection device

technical field

The invention relates to the technical field of elevator detection, in particular to a no-load elevator overload switch detection device.

Background technique

Overload protection is an important safety guarantee for elevators. Elevator manufacturers design the corresponding frequency converter, traction machine, car and counterweight according to the rated load capacity of the elevator. When the actual load exceeds the rated load, it will increase the probability of elevator failure or even accidents. In light cases, there may be poor leveling accuracy of the elevator, accelerated damage to various components, and deformation of the car; The failure of the clamping stop causes the elevator to fall, causing serious consequences of machine crash and death.

From 2013 to 2015, the number of new elevators installed in my country each year was 630,000, 716,000, and 760,000, showing an increasing trend year by year. By the end of 2015, the number of elevators in my country exceeded 4 million. TSG 7001-2009 "Elevator Supervision Inspection and Periodic Inspection Rules - Traction and Forced Drive Elevators" stipulates that the overload switch verification must be carried out during the acceptance of new elevators and the annual inspection of old elevators; issued by the General Administration of Quality Supervision, Inspection and Quarantine on July 1, 2014 The "Elevator Construction Category Classification Table" clearly stipulates that after the elevator is redecorated or installed with an air conditioner, it is a transformation, and the overload switch needs to be readjusted. The current overload switch verification method is on-load verification. The process requires moving weights, which is time-consuming and labor-intensive. Especially during the annual inspection of the elevator, it is difficult to verify the effectiveness of the overload device. Therefore, based on the research on the common forms of existing overload devices, this paper proposes a no-load verification method for overload protection devices, which can accurately and quickly verify the effectiveness of elevator overload devices.

Contents of the invention

In order to solve the above technical problems, the purpose of the present invention is to provide a no-load elevator overload switch detection device, which solves the technical problem of needing to carry weights exceeding the rated load in the inspection process of the existing detection technology, which is laborious and laborious.

The purpose of the present invention is achieved through the following technical solutions:

A no-load elevator overload switch detection device, comprising: a fixed clamp block, a bracket, a trapezoidal screw rod, a movable clamp block, a pressure sensor and a driving device;

The fixed clamping block and bracket are used to support and clamp the action plate at one end of the overload switch;

The trapezoidal screw rod is arranged on the fixed clamp block and the bracket part, and drives the movable clamp block to move up and down when rotating;

The movable clamping block is assembled on the trapezoidal screw rod, and is used to clamp the action plate at the other end of the overload switch;

The pressure sensor is installed on the movable clamp block, and is used to measure the force on the action plate at one end of the overload switch clamped by the movable clamp block;

The driving device is fixed on the fixed splint and the bracket, and is used for outputting torque and acting on the trapezoidal screw rod.

Compared with the prior art, one or more embodiments of the present invention may have the following advantages:

Improve the current overload switch verification need to carry the weight problem, change the load to no load, save time and effort;

The data acquisition and display controller can realize real-time viewing of the pressure value of the pressure sensor, and accurately measure the load value required in the car when the overload switch is activated;

After the no-load overload switch detection device is installed at the test position, the motor and the deceleration device can be remotely controlled to apply force through the data acquisition and display controller, which is safe and reliable;

Small size, easy to carry features.

Description of drawings

Fig. 1 is the structural representation of the elevator overload switch detection device of no load;

Fig. 2 is a schematic structural view of a movable clamp block in a preferred embodiment of the present invention;

Fig. 3 is a schematic diagram of the structure of a trapezoidal wire mandrel in a preferred embodiment of the present invention;

Fig. 4 is the schematic diagram of the installation state of the elevator no-load overload detection device for detecting the rope end overload switch of the present invention;

Fig. 5 is a schematic diagram of the installation state of the elevator no-load overload detection device for detecting the car floor overload switch of the present invention.

In the figure: 1 is 1-fixed clamp block; 2-bracket; 3-trapezoidal screw rod; 4-moving clamp block; 5-drive device; 6-guide groove; 7-pressure sensor; 8-bearing; 9-harmonic Wave reducer; 10-connecting flange; 11-servo motor; 12-pressure sensor slot; 13-guide shoe; 14-rotating platform; 15-weighing rotating platform; 16-trapezoidal thread; 18-overload switch tester; 19-rope spring; 20-rope support plate; 21-rope pull plate; 22-overload switch; 23-rubber pad; 24-movable car bottom; 25-car bottom support frame.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.

As shown in Figure 1, it is the structure of the elevator overload switch detection device without load, including: fixed clamp block 1, support 2, trapezoidal wire rod 3, movable clamp block 4, pressure sensor 7 and driving device 5;

The fixed clamping block and the bracket are used to support and clamp the action plate at one end of the overload switch; the trapezoidal screw rod is arranged on the fixed clamping block and the bracket part, and drives the movable clamping block to move up and down when rotating; The movable clamp block is assembled on the trapezoidal screw rod, and is used to clamp the action plate at the other end of the overload switch; the pressure sensor is installed on the movable clamp block, and is used to measure tighten the force on the action plate at one end of the overload switch; the driving device is fixed on the fixed splint and the bracket, and is used to output torque and act on the trapezoidal screw rod.

Both the fixed clamp block and the movable clamp block are configured as wedge-shaped structures.

In order to make the movable clamp block move up and down smoothly, a guide groove 6 is provided on the above-mentioned bracket; a guide shoe 13 is provided on the movable clamp block, and the guide shoe guides the movement in the guide groove of the bracket, and the movable clamp The other end of the block, that is opposite to the guide shoe, is provided with a pressure sensor slot (as shown in Figure 2).

The drive device includes a servo motor 11, a connecting flange 10, a harmonic reducer 9 and a connecting piece;

The servo motor and the harmonic reducer are connected together through the connecting flange;

One end of the connecting piece is fixed on the harmonic reducer, and the other end acts on the trapezoidal screw. Among them, the positioning of the servo motor is accurate and the output is stable, and the harmonic reducer can achieve a large reduction ratio and amplify the output torque of the servo motor.

In order to read the value of the pressure sensor and control the driving device, the above-mentioned device also includes a data acquisition and display controller, which is respectively connected with the pressure sensor, the motor and the deceleration device, and is used to read the pressure value of the pressure sensor and control the servo drive. operation of the motor.

In order to reduce the interference of external force when the driving device drives the trapezoidal threaded rod, the above-mentioned clamping block and the bracket are respectively provided with annular grooves, and bearings 8 are installed in the annular grooves.

The above-mentioned bearings include deep groove bearings and thrust bearings; the deep groove bearings are installed in the annular groove of the clamping block, and the deep groove bearings and thrust bearings are respectively installed in the annular grooves of the bracket.

The two ends of the above-mentioned trapezoidal screw rod are respectively provided with a clamping rotary platform 14 and a weighing rotary platform 15. The clamping rotary platform acts on the deep groove platform of the bearing, and the load-bearing rotary platform acts on the deep groove bearing and the thrust bearing; the trapezoidal pattern A trapezoidal thread 16 is arranged on the outside of the screw mandrel, and a notched shaft 17 (as shown in Figure 3 ) is used inside.

In order to accurately measure the force exerted by the overload switch tester 18, the above-mentioned pressure sensor is selected from a miniature load cell.

In the above embodiment, the effectiveness of the overload protection device is verified by simulating the load of the car by applying force through the rubber pad and the spring.

As shown in Fig. 1, Fig. 4, and Fig. 5, the present invention will specifically illustrate the using method of the overload tester 18 by taking the measurement of the steel rope head position overload switch and the car bottom switch overload switch as an example.

Rope head position overload switch test: put a pair of overload switch testers on the opposite corners of the rope head overload switch respectively, the fixed clamp block acts on the rope end support plate 20, and the movable clamp block acts on the rope end pull plate 21. The driving device sends a pulse signal, the trapezoidal screw rod rotates, the movable clamp block moves downward, and the rope head spring 19 is compressed until the overload switch 22 acts, and the value of the pressure sensor at this time is recorded, and the test is completed.

Car bottom position overload switch test: place a pair of overload switch testers at the opposite corners of the car bottom overload switch, the fixed clip acts on the movable car bottom 24, the movable clip acts on the car bottom support frame 25, and the drive device Send a pulse signal, the trapezoidal threaded screw rotates, the movable clamp block moves upwards, and the rubber pad 23 is compressed until the overload switch operates, and the value of the pressure sensor at this time is recorded, and the test is completed.

Although the embodiments disclosed in the present invention are as above, the described content is only an embodiment adopted for the convenience of understanding the present invention, and is not intended to limit the present invention. Anyone skilled in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the present invention, but the patent protection scope of the present invention, The scope defined by the appended claims must still prevail.

Claims (9)

1. a kind of uncharged elevator overload closing detecting apparatus, it is characterised in that described device includes：Clamp block, support, ladder Shape line screw mandrel, dynamic fixture block, pressure sensor and drive device；

The clamp block and support, the action plate for supporting and clamping overload switch one end；

The ladders in painting screw mandrel, is arranged at the clamp block and holder part, and drives dynamic fixture block to move up and down when rotated；

The dynamic fixture block, is assemblied on the ladders in painting screw mandrel, the action plate for clamping the overload switch other end；

The pressure sensor, is installed with the dynamic fixture block, the effect of overload switch one end is clamped for measuring dynamic fixture block Power on plate；

On the drive device, the fixed and clamp plate and support, for output torque, and by moment loading in described trapezoidal On line screw mandrel.

2. uncharged elevator overload closing detecting apparatus as claimed in claim 1, it is characterised in that the clamp block and dynamic Fixture block is disposed as wedge structure.

3. uncharged elevator overload closing detecting apparatus as claimed in claim 1, it is characterised in that set on the support There is guide groove；It is provided with the dynamic fixture block and leads boots, and leads boots guiding movement in the guide groove of the support.

4. uncharged elevator overload closing detecting apparatus as claimed in claim 1, it is characterised in that the drive device bag Include servomotor, adpting flange, harmonic wave speed reducing machine and connector；

The servomotor is linked together with harmonic wave speed reducing machine by the adpting flange；

Described connector one end is fixed on the harmonic wave speed reducing machine, and the other end is acted on the ladders in painting screw mandrel.

5. uncharged elevator overload closing detecting apparatus as claimed in claim 1, it is characterised in that described device also includes Data acquisition display control instrument, the controller is connected with the pressure sensor, motor and deceleration device respectively, for reading pressure The pressure value of force snesor and the running for controlling servomotor.

6. uncharged elevator overload closing detecting apparatus as claimed in claim 1, it is characterised in that the clamp block and branch Annular groove is respectively arranged with frame, and bearing is installed in the annular groove.

7. uncharged elevator overload closing detecting apparatus as claimed in claim 1, it is characterised in that the bearing includes deep Ditch bearing and thrust bearing；The zanjon bearing is arranged in clamp block annular groove, and depth is separately installed with support annular groove Ditch bearing and thrust bearing.

8. uncharged elevator overload closing detecting apparatus as claimed in claim 1, it is characterised in that the ladders in painting screw mandrel One end be provided with screens rotation platform, the other end is provided with load-bearing rotation platform, and screens rotation platform acts on bearing zanjon and put down On platform, load-bearing rotation platform action is on zanjon bearing and thrust bearing.

9. uncharged elevator overload closing detecting apparatus as claimed in claim 1, it is characterised in that the pressure sensor For miniature force cell.