CN218403464U

CN218403464U - Lifting hook safety height limiting device of hoisting machinery

Info

Publication number: CN218403464U
Application number: CN202222884876.XU
Authority: CN
Inventors: 周永恒
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-01-31
Anticipated expiration: 2032-10-31

Abstract

The utility model discloses a hoisting machinery's lifting hook safety height stop device, hoisting machine's hoisting mechanism including, controller and relay, hoisting mechanism is including the hoist engine, wire rope, running block and lifting hook, the relay is connected in the power supply circuit of hoist engine, the bottom fixedly connected with fixing base of hoist engine, the middle part of fixing base is equipped with vertical through-hole, install in the vertical through-hole and follow its inner wall gliding stopper from top to bottom, the lower extreme of stopper extends, pressure sensor is installed to the bottom face of stopper, the controller is connected with pressure sensor and relay electricity respectively. The utility model discloses when the lifting hook rises to maximum stroke (safety height) department, can in time cut off the power supply loop of hoist engine, realize preventing on the basis that the lifting hook continues to rise, can reduce the condition that influences life because of the rigid contact to the safe operation of lifting hook has been guaranteed.

Description

Lifting hook safety height limiting device of hoisting machinery

Technical Field

The utility model relates to a hoisting machinery technical field specifically is a hoisting machinery's lifting hook safety height stop device.

Background

The hoisting machine is an engineering machine capable of carrying out operations such as material hoisting, transportation, loading and unloading, is widely applied to hoisting operation and hoisting operation under working conditions such as construction sites, ports and docks, oil fields, railways, warehouses, wind power and the like, and becomes an important tool for reducing labor intensity and improving production efficiency. As one of the important parts of a hoisting machine, a hoisting mechanism is used to lift an object, and generally includes a winch, a wire rope, a movable pulley block and a hook.

In order to prevent the lifting height of the lifting hook from being too high, i.e. the lifting hook is limited within the safe height range, and to avoid safety accidents caused by collision of the lifting hook with other parts, a limiting device is usually arranged at the maximum lifting stroke of the lifting hook, i.e. the safe height of the lifting hook. At present, this stop device adopts high stopper mostly, rises to the maximum stroke when the lifting hook, when rising to the safety height promptly, can touch the one end of jacking lever, makes it upwards deflect, and the other end of lever deflects downwards, presses limit switch, cuts off the power supply circuit of hoist engine for the motor stall of hoist engine realizes the purpose of shutting down.

However, in the actual use process, because the contact between the lifting hook and the height limiter is rigid contact, even impact can be generated, the service life of the height limiter can be influenced by frequent rigid contact, the action failure or the contact abrasion of the switch exceeds the standard, and the safe operation of the lifting hook is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defect and not enough that prior art exists, provide a hoisting machinery's lifting hook safety height stop device, when the lifting hook rises to maximum stroke (safety height) department, can in time cut off the power supply circuit of hoist engine, realize preventing on the basis that the lifting hook continues to rise, can reduce the condition that influences life because of the rigid contact to guarantee the safe operation of lifting hook from this.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a hoisting machinery's lifting hook safety height stop device, is including hoisting mechanism, controller and the relay of hoisting machinery, hoisting mechanism including hoist engine, wire rope, running block and lifting hook, the relay connect in the power supply circuit of hoist engine, its characterized in that: the bottom of the winch is fixedly connected with a fixing seat, a vertical through hole is formed in the middle of the fixing seat, a limiting block capable of sliding up and down along the inner wall of the vertical through hole is installed in the vertical through hole, the lower end of the limiting block extends out, a pressure sensor is installed on the bottom end face of the limiting block, and the controller is electrically connected with the pressure sensor and the relay respectively.

Furthermore, the vertical through hole is a step hole with a wide upper part and a narrow lower part, and the inner edge of the upper port of the step hole is fixedly connected with a sealing cover.

Furthermore, the top end of the limiting block is provided with an end head which is integrally connected, the end head can slide up and down along the inner wall of the upper hole of the stepped hole, and a spring is connected between the sealing cover and the end head.

Furthermore, an ultrasonic ranging sensor electrically connected with the controller is installed on the inner side surface of the sealing cover, and a probe of the ultrasonic ranging sensor faces the end head.

Furthermore, the bottom end face of the limiting block is an arc-shaped concave face matched with the outer circular face of the shell of the movable pulley block.

Furthermore, the pressure sensor adopts a film flexible pressure sensor, and the film flexible pressure sensor is bent into an arc-shaped structure and is adhered to the arc-shaped concave surface.

Furthermore, vertical through holes for the steel wire rope to pass through are respectively arranged on two sides of the fixing seat.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses the biggest stroke department that rises at the lifting hook, safe high department at the lifting hook sets up the stopper promptly, the stopper can be followed the inside vertical through-hole of fixing base and stretched out and draw back, and install pressure sensor (the flexible pressure sensor of film) in the bottom of stopper, after contacting the shell of the movable pulley group that rises, receive a segment distance that jacking effect and lifting hook are synchronous to rise, produce the flexonics, at this in-process, pressure sensor detects the shell of movable pulley group and conveys to the controller to its applied pressure data, the disconnection of controller control relay, cut off the power supply circuit of hoist engine, realize shutting down, prevent the lifting hook to continue to rise, the condition that influences life because of rigid contact has been reduced, thereby the safe operation of lifting hook has been guaranteed.

2. The utility model discloses ultrasonic ranging sensor who is connected with the controller electricity in the medial surface installation of closing cap, real-time and stopper (end) between distance data and send to the controller, jacking stopper (end) make the distance data that detect reach (shorten to) when the safety threshold because of the lifting hook rises, controller control relay disconnection, cut off the power supply circuit of hoist engine, realize shutting down, prevent the lifting hook to continue to rise, form "double insurance" with pressure sensor (the flexible pressure sensor of film), the safe operation of pressure sensor (the flexible pressure sensor of film) because of frequent contact failure influence lifting hook has been avoided.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a control schematic block diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a lifting hook safety height limiting device of hoisting machinery, including hoisting machinery's hoisting mechanism, controller 1 and relay 2 (normally closed relay), hoisting mechanism includes hoist 3, wire rope 4, running block 5 and lifting hook 6, relay 2 connects in hoist 3's power supply loop, hoist 3's bottom fixedly connected with fixing base 7, the middle part of fixing base 7 is equipped with vertical through-hole 8, install stopper 9 that can follow its inner wall and slide from top to bottom in the vertical through-hole 8, the lower extreme of stopper 9 extends, pressure sensor 10 is installed to the bottom face of stopper 9, controller 1 is connected with pressure sensor 10 and relay 2 electricity respectively.

It should be noted that, the fixing seat 7 is fixedly connected to the bottom of the hoisting machine 3, and the following two installation situations can be adopted: for a closed hoist (i.e., a hoist with a housing), the fixed seat 7 may be fixedly connected to the bottom of the housing of the hoist 3; for an open hoist (i.e. a hoist without a housing), the fixed mount 7 may be fixedly attached to the bottom of the mounting base of the hoist 3.

The utility model discloses in, vertical through-hole 8 is narrow step hole under wide, the interior fixedly connected with closing cap 11 of following of the last port in step hole.

The utility model discloses in, stopper 9's top has a body coupling's end 12, and end 12 can be followed the inner wall in the upper hole in step hole and slided from top to bottom, is connected with spring 13 between closing cap 11 and the end 12.

From this, through designing vertical through-hole 8 into narrow step hole about wide to at stopper 9 top an organic whole be connected with end 12, make end 12 only can slide from top to bottom along the inner wall in the upper hole in step hole, on guaranteeing that stopper 9 can follow the gliding basis from top to bottom of the inner wall of vertical through-hole 8, make stopper 9 can not break away from vertical through-hole 8.

In addition, through setting up spring 13, when stopper 9 moves up along the inner wall of vertical through-hole 8, spring 13 compression energy storage, under the limiting action of spring 13, make pressure sensor (the flexible pressure sensor of film) 10 on the basis that produces the flexible contact with the shell of running block 5, can also make the shell of running block 5 to produce sufficient pressure to pressure sensor (the flexible pressure sensor of film) 10, and then make pressure sensor (the flexible pressure sensor of film) 10 can detect pressure data, rather than the two only keep in contact and not extruded relation.

The utility model discloses in, ultrasonic ranging sensor 14 of being connected with 1 electricity of controller is installed to the medial surface of closing cap 11, and ultrasonic ranging sensor 14's probe is towards end 12.

From this, through setting up ultrasonic ranging sensor 14, can real-time detection and stopper 9 (end 12) between the distance data and send to controller 1, at the in-process that makes the shell jacking stopper 9 (end 12) of assembly pulley 5 because of lifting hook 6 rises, when the distance data that detects reach (shorten to) safety threshold, controller 1 control relay 2 disconnection, cut off the power supply circuit of hoist engine 3, realize shutting down, prevent that lifting hook 6 from continuing to rise, form "dual fail-safe" with pressure sensor (flexible pressure sensor of film) 10, like this, even if pressure sensor (flexible pressure sensor of film) 10 appears malfunctioning because of frequent contact, lifting hook 6 also can continue to keep safe operation.

The utility model discloses in, the bottom face of stopper 9 is the arc concave surface with the outer disc looks adaptation of the shell of running block 5.

The utility model discloses in, pressure sensor 10 adopts the flexible pressure sensor of film, and the flexible pressure sensor of film bends into the arc structure to paste on the arc concave surface, with this area of contact that can improve the shell with running pulley 5, and then can improve and detect the precision.

It should be noted that channels should be formed in the limiting block 9, the end 12 and the sealing cover 11 to facilitate the lead-out of the connection wires of the film flexible pressure sensor; of course, the connections of the ultrasonic distance measuring sensor 14 can also be led out through channels in the cover 11.

The utility model discloses in, the both sides of fixing base 7 are equipped with the vertical perforation 15 that supplies wire rope 4 to pass respectively, do not influence wire rope 4's normal receiving and releasing from this.

The invention is further described with reference to the following drawings:

a safety threshold for the distance data between the ultrasonic distance measuring sensor 14 and the head 12 is set in the controller 1 by means of a conventional programmed setting, without being limited thereto. It should be noted that the set safety threshold should be greater than the distance between the ultrasonic distance measuring sensor 14 and the end 12 when the limit block 9 is completely retracted into the vertical through hole 8, so as to prevent the housing of the pulley block 5 from striking the fixed seat 7.

Furthermore, the pressure data detected by the pressure sensor (membrane flexible pressure sensor) 10 need not reach a significant value, above a zero value, relative to the zero value.

In an initial state, the spring 13 naturally extends, the limiting block 9 naturally droops, the end 12 at the top end of the limiting block is pressed on the step surface of the vertical through hole (step hole) 8, and the bottom end of the limiting block is exposed.

When the winch 3 tows the steel wire rope 4 to ascend, the movable pulley block 5 and the lifting hook 6 (the goods hoisted thereon) are driven to ascend synchronously, when the movable pulley block 5 and the lifting hook 6 ascend to the maximum height, namely, the safety height, the shell of the pulley block 5 is in contact with the bottom end face (the arc concave face) of the limiting block 9, namely, the jacking limiting block 9 ascends synchronously for a short distance, the lower end of the limiting block 9 should be exposed by most parts instead of being completely retracted into the vertical through hole 8, and the shell of the pulley block 5 is in flexible contact with the limiting block 9. In the process, the pressure sensor (film flexible pressure sensor) 10 detects pressure data applied to the shell of the movable pulley block 5 and transmits the pressure data to the controller 1, and in order to meet the flexible contact relation, the controller 1 sends a control command (level signal) to the relay 2 after delaying for several seconds, so that the relay 2 is disconnected, a power supply loop of the winch 3 is cut off, the machine is stopped, the hook 6 is prevented from continuously rising, and the safe operation of the hook 6 is ensured. At this time, the distance data detected by the ultrasonic ranging sensor 14 does not reach (shortens to) the safety threshold.

In addition, ultrasonic ranging sensor 14 real-time detection and stopper 9 (end 12) between distance data and send to controller 1, at the in-process that makes the shell jacking stopper 9 (end 12) of assembly pulley 5 because of lifting hook 6 rises, when the distance data that detect reach (shorten to) safety threshold, controller 1 control relay 2 disconnection, cut off the power supply circuit of hoist engine 3, the realization is shut down, prevent that lifting hook 6 from continuing to rise, form "dual fail safe" with pressure sensor (flexible pressure sensor of film) 10, even if pressure sensor (flexible pressure sensor of film) 10 appears malfunctioning because of frequent contact, also can guarantee that lifting hook 6 continues to keep safe operation.

Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.

Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all the equivalent changes made within the scope of the claims of the present application are the protection scope of the claims of the present application.

Claims

1. The utility model provides a hoisting machinery's lifting hook safety height stop device, is including hoisting mechanism, controller and the relay of hoisting machinery, hoisting mechanism including hoist engine, wire rope, running block and lifting hook, the relay connect in the power supply circuit of hoist engine, its characterized in that: the bottom of the winch is fixedly connected with a fixed seat, a vertical through hole is formed in the middle of the fixed seat, a limiting block capable of sliding up and down along the inner wall of the vertical through hole is installed in the vertical through hole, the lower end of the limiting block extends out, a pressure sensor is installed on the bottom end face of the limiting block, and the controller is electrically connected with the pressure sensor and the relay respectively.

2. The safety height limiting device for the lifting hook of the hoisting machine as claimed in claim 1, wherein: the vertical through hole is a stepped hole with a wide upper part and a narrow lower part, and the inner edge of the upper port of the stepped hole is fixedly connected with a sealing cover.

3. The lifting hook safety height limiting device of the hoisting machine according to claim 2, wherein: the top end of the limiting block is provided with an end head which is integrally connected, the end head can slide up and down along the inner wall of the upper hole of the stepped hole, and a spring is connected between the sealing cover and the end head.

4. The safety height limiting device for the lifting hook of the hoisting machine as claimed in claim 3, wherein: and an ultrasonic ranging sensor electrically connected with the controller is installed on the inner side surface of the sealing cover, and a probe of the ultrasonic ranging sensor faces the end head.

5. The lifting hook safety height limiting device of the hoisting machine according to claim 1, wherein: the bottom end face of the limiting block is an arc-shaped concave face matched with the outer circular face of the shell of the movable pulley block.

6. The lifting hook safety height limiting device of the hoisting machine as claimed in claim 5, wherein: the pressure sensor adopts a film flexible pressure sensor, and the film flexible pressure sensor is bent into an arc-shaped structure and is adhered to the arc-shaped concave surface.

7. The lifting hook safety height limiting device of the hoisting machine according to claim 1, wherein: and vertical through holes for the steel wire rope to pass through are respectively arranged on two sides of the fixed seat.