CN109052101B

CN109052101B - Safety buffer device for construction lifter

Info

Publication number: CN109052101B
Application number: CN201811167851.XA
Authority: CN
Inventors: 邹小平; 陈智龙; 陈智虎
Original assignee: Zhangjiagang Rongda Construction Machinery Manufacturing Co ltd
Current assignee: Zhangjiagang Rongda Construction Machinery Manufacturing Co ltd
Priority date: 2018-10-08
Filing date: 2018-10-08
Publication date: 2023-08-22
Anticipated expiration: 2038-10-08
Also published as: CN109052101A

Abstract

The invention discloses a safety buffer device for a construction lifter, which comprises a frame, a lifting cage arranged on the frame, a driving mechanism for driving the lifting cage to lift, and a power switch for controlling the driving mechanism to run or stop, wherein the safety buffer device is positioned below the lifting cage and comprises a buffer component for propping against the lifting cage, a safety switch arranged on one side of the buffer component, and a push rod connected on one side of the buffer component and extending towards a direction approaching to the safety switch, wherein the safety switch and the power switch are synchronously arranged. According to the safe buffering device for the construction lifter, through the arrangement of the buffering component and the safe switch, on one hand, the buffering component can play a role in buffering the falling of a suspension cage; on the other hand, the safety switch can be used for cutting off the power supply of the construction hoist in an associated way, so that unnecessary energy consumption is reduced, and the potential safety hazard that the construction hoist still continues to operate when an accident occurs is eliminated.

Description

Safety buffer device for construction lifter

Technical Field

The invention relates to the field of building machinery, in particular to a safety buffer device for a construction lifter.

Background

The construction lifter is a construction machine which is frequently used in construction sites and used for people and goods, and mainly plays a role in vertically conveying people and materials.

In the operation process of the construction hoist, the risk of uncontrolled falling of the suspension cage can occur due to control failure or braking failure of the construction hoist, so that the safety of constructors is greatly threatened, and the construction hoist is easily damaged.

At present, the kinetic energy of the falling of the suspension cage is generally absorbed through a buffer device, and the final protection is provided to ensure the safety of personnel and the construction lifter structure. However, the existing buffer device only has a buffer effect, but cannot prevent the construction lifter from continuing to operate, so that the construction lifter which continuously operates not only increases unnecessary energy consumption, but also has great potential safety hazard.

Disclosure of Invention

The invention aims to provide a safe buffer device for a construction lifter, which has a simple structure and a good buffer effect.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the utility model provides a safe buffer for construction elevator, the construction elevator includes frame, lift locate cage in the frame, be used for the drive the actuating mechanism of cage lift, be used for controlling actuating mechanism operation or stop's switch, safe buffer is located the cage below, it includes and is used for supporting the buffer unit of cage, locates the safety switch of buffer unit one side, connect in buffer unit one side and towards being close to the push rod that the direction of safety switch extends, wherein, safety switch with switch sets up in step mutually.

Preferably, the buffer assembly comprises a shell, a plunger rod which is arranged in the shell and stretches along the lifting direction of the suspension cage, a spring which is sleeved on the plunger rod, and a pressure head which is arranged at one end of the plunger rod away from the shell, wherein two ends of the spring are respectively abutted to the shell and the pressure head.

Further preferably, the safety switch is provided on a side portion of the housing near an end of the plunger rod.

Further preferably, one end of the push rod is connected to a side of one end of the plunger rod, which is far away from the housing.

Further preferably, the buffer assemblies are arranged in three groups, and the three groups of buffer assemblies are arranged in a finished product shape.

Further preferably, the buffer assembly further comprises a base fixed on the ground, and the shell is detachably connected to the base.

Still further preferably, the housing and the base are connected by bolts.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the safe buffering device for the construction lifter, through the arrangement of the buffering component and the safe switch, on one hand, the buffering component can play a role in buffering the falling of a suspension cage; on the other hand, the safety switch can be used for cutting off the power supply of the construction hoist in an associated way, so that unnecessary energy consumption is reduced, and the potential safety hazard that the construction hoist still continues to operate when an accident occurs is eliminated.

Drawings

FIG. 1 is a schematic diagram of a safety buffer device according to the present invention;

fig. 2 is a schematic installation view of the safety buffer device of the present invention.

Wherein: 1. a buffer assembly; 11. a housing; 12. a plunger rod; 13. a spring; 14. a pressure head; 15. a base; 2. a safety switch; 3. a push rod;

100. a frame.

Detailed Description

The technical scheme of the invention is further described below with reference to the accompanying drawings.

Referring to fig. 1-2, a safety buffer device for a construction hoist includes a frame 100, a cage (not shown) provided on the frame 100 to be lifted and lowered, a driving mechanism (not shown) for driving the cage to be lifted and lowered, and a power switch (not shown) for controlling the driving mechanism to be operated or stopped, the safety buffer device being located below the cage, and including a buffer assembly 1 for supporting the cage, a safety switch 2 provided on one side of the buffer assembly 1, and a push rod 3 connected to one side of the buffer assembly 1 and extending in a direction approaching the safety switch 2, wherein the safety switch 2 is provided in the same step as the power switch.

Through the arrangement of the buffer component 1 and the safety switch 2, on one hand, the buffer component 1 can play a role in buffering the falling of the suspension cage; on the other hand, the safety switch 2 can be associated to cut off the power supply of the construction hoist, thereby reducing unnecessary energy consumption and eliminating the potential safety hazard of continuous operation of the construction hoist.

The buffer assembly 1 comprises a shell 11, a plunger rod 12 which stretches and contracts along the lifting direction of the suspension cage and is arranged in the shell 11, a spring 13 which is sleeved on the plunger rod 12, and a pressure head 14 which is arranged at one end of the plunger rod 12 far away from the shell 11, wherein two ends of the spring 13 are respectively abutted on the shell 11 and the pressure head 14. Wherein the safety switch 2 is arranged on the side part of one end of the shell 11, which is close to the plunger rod 12, and one end of the push rod 3 is connected to the side part of one end of the plunger rod 12, which is far away from the shell 11.

Here, when the control or braking of the construction hoist fails, the cage falls down, presses against the ram 14 with a certain gravitational acceleration, the ram 14 moves down together with the plunger rod 12, the spring 13 and the push rod 3, and the spring force of the spring 13 can buffer the falling down of the cage. After the far end of the push rod 3 contacts and disconnects the safety switch 2, the gravity of the construction hoist is insufficient to overcome the elasticity of the spring 13 to enable the construction hoist to continue to run downwards, and the safety switch 2 and the power switch are arranged synchronously, so that the construction hoist stops working, and equipment is effectively protected. Here, the total travel of the ram 14 and plunger rod 12 is limited to no less than 65mm by the relative positioning of the components.

In this embodiment, the buffer assembly 1 is a combination of an oil cylinder and a spring, wherein the housing 11 is a body of the oil cylinder, and the plunger rod 12 is a plunger rod of the oil cylinder. An unexpected stop self-starting oil cylinder program is arranged in a control system of the construction hoist, after the construction hoist stops running for 120s, the oil cylinder is started to jack up a lifting cage upwards, a push rod 3 leaves a safety switch 2, a power switch is closed, and the construction hoist continues to run.

Here, the buffer components 1 have three groups, and the three groups of buffer components 1 are arranged in a finished product font.

The buffer assembly 1 further comprises a base 15 fixedly arranged on the ground, and the shell 11 is detachably connected to the base 15. The housing 11 and the base 15 are connected by bolts.

The working procedure of this embodiment is specifically described below: when the control or braking of the construction hoist fails, the cage falls downwards and is pressed on the pressure head 14 with a certain gravity acceleration, the pressure head 14 moves downwards together with the plunger rod 12, the spring 13 and the push rod 3, and the elasticity of the spring 13 can play a role in buffering the falling of the cage. After the distal end of the push rod 3 contacts and turns off the safety switch 2, the weight of the construction hoist body is insufficient to continue the downward operation, and the construction hoist stops operating due to the safety switch 2 being disposed in synchronization with the power switch. After the construction hoist stops running for 120s, the oil cylinder is started to jack up the cage upwards, the push rod 3 leaves the safety switch 2, the power switch is closed, and the construction hoist continues running.

The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims

1. The utility model provides a safe buffer for construction elevator, the construction elevator includes frame (100), the lifting locating on frame (100), is used for driving the actuating mechanism that the lifting of lifting, be used for controlling actuating mechanism operation or stop switch, its characterized in that: the safety buffer device is positioned below the hanging cage and comprises a buffer assembly (1) for supporting the hanging cage, a safety switch (2) arranged on one side of the buffer assembly (1) and a push rod (3) connected to one side of the buffer assembly (1) and extending towards the direction close to the safety switch (2), wherein the safety switch (2) is synchronously arranged with the power switch;

the buffer assembly (1) comprises a shell (11), a plunger rod (12) which stretches and contracts along the lifting direction of the suspension cage and is arranged in the shell (11), a spring (13) which is sleeved on the plunger rod (12), and a pressure head (14) which is arranged at one end of the plunger rod (12) far away from the shell (11), wherein two ends of the spring (13) are respectively abutted to the shell (11) and the pressure head (14);

the safety switch (2) is arranged on one side part of the shell (11) close to the plunger rod (12);

one end of the push rod (3) is connected to the side part of one end of the plunger rod (12) far away from the shell (11).

2. A safety buffer for a construction hoist according to claim 1, characterized in that: the buffer components (1) are arranged in three groups, and the three groups of buffer components (1) are arranged in a finished product shape.

3. A safety buffer for a construction hoist according to claim 1, characterized in that: the buffer assembly (1) further comprises a base (15) fixedly arranged on the ground, and the shell (11) is detachably connected to the base (15).

4. A safety buffer for a construction hoist according to claim 3, characterized in that: the shell (11) is connected with the base (15) through bolts.