CN201473236U

CN201473236U - Pipe sling jib limit device with buffer mechanism

Info

Publication number: CN201473236U
Application number: CN2009203080892U
Authority: CN
Inventors: 蒋怡远; 刘政; 杨星任; 彭兵
Original assignee: GUILIN HUALI HEAVY INDUSTRY MACHINERY Co Ltd; GUANGXI HUALI GROUP CO Ltd
Current assignee: GUILIN HUALI HEAVY INDUSTRY MACHINERY Co Ltd; GUANGXI HUALI GROUP CO Ltd
Priority date: 2009-08-15
Filing date: 2009-08-15
Publication date: 2010-05-19
Anticipated expiration: 2019-08-15

Abstract

A pipe sling jib limit device with a buffer mechanism comprises a push rod, a spring, a mounting base and a limit switch, both ends of the mounting are respectively connected with a cover plate and a guide sleeve, the push rod nested with the spring is mounted in the mounting base, both ends of the push rod respectively penetrate through the guide sleeve and the cover plate to move axially along the axis of the mounting base, the limit switch is mounted on a mounting plate connected with the mounting base and is positioned at one end of the push rod penetrating through the guide sleeve; one end of the push rod close to the cover plate is connected and matched with a positioning sleeve, one end of the spring nested on the push rod is fixed on the positioning sleeve, the other end is fixed on one end of the mounting base connected with the guide sleeve, the push rod moves axially along the axis to drive the positioning sleeve to compress the spring and is acted by the acting force of the spring synchronously; one end of the push rod close to the guide sleeve is provided with a step on which a rubber gasket is mounted. The pipe sling jib limit device with the buffer mechanism not only ensures the jib to have effective buffering and limit effect and prevents the sling to have tipping situation, but also avoids the jib from bearing greater impact load and being damaged, and improves the service life of the pipe sling.

Description

A kind of pipe sling arm inhibiting device with buffer gear

[technical field]

The utility model relates to a kind of safety device that is used for weight-lifting equipment, particularly a kind of arm inhibiting device of pipe sling.

[background technology]

Pipe sling is a kind of equipment of designing and developing at pipelaying such as oil, natural fuels specially, be mainly used in transportation, counterpart, hyposulculus operation of pipeline etc., in order to enlarge the scope of work of pipe sling, often adopt luffing mechanism to change the amplitude of pipe sling, the luffing mechanism that pipe sling adopts is the boom type luffing mechanism, and just the pipe sling arm is around propping up the certain angle of spot wobble to change the pipe sling amplitude; Because lifting operation has certain risk, the angle of arm swing must be limited in certain scope, otherwise the phenomenon of tumbling will occur, and causes a serious accident, and therefore arm safety inhibiting device need be set on machine.Existing pipe sling arm safety inhibiting device is directly by the push shaft contact switch, and promptly the break-make by switch realizes spacing to arm; Its shortcoming be not arm stop operating advance row buffering, cause arm to bear bigger impact load, so arm is damaged easily, the push rod switch is malfunctioning easily; Though be with recoil spring on its push shaft of arm safety inhibiting device that has, arm obtains buffering before stopping operating, because the effect of inertia of arm, but its limit effect still is not fine.

[utility model content]

The purpose of this utility model be to provide a kind of effectively prevent arm tumble, guarantee simultaneously arm stop operating before effectively buffer limit, safe and reliable pipe sling arm inhibiting device, to overcome the weak point of above-mentioned prior art.

The technical scheme that solves the problems of the technologies described above is: a kind of pipe sling arm inhibiting device with buffer gear, comprise push rod, spring, mount pad and limit switch, the mount pad two ends connect cover plate and orienting sleeve respectively, the push rod that is with spring is installed in the mount pad, the two ends of push rod are passed orienting sleeve and cover plate respectively and can be made axial motion along the mount pad axis, limit switch be installed in mount pad bonded assembly adapter plate on, its position is positioned at the end that push rod passes orienting sleeve; One end of the nearly cover plate of described push rod is connected with locating bush by pin fit, spring one end that is enclosed within on the push rod is fixed on the locating bush, the other end is fixed on the end that mount pad connects orienting sleeve, and push rod can drive the locating bush compression spring, be subjected to the antagonistic force of spring simultaneously along the mount pad axis when the orienting sleeve direction is made axial motion; One end of the nearly orienting sleeve of described push rod has a step, and rubber cushion is installed on the step.

Its further technical scheme is: the key that the external peripheral surface at the position that described push rod cooperates with orienting sleeve has an anti-throw-out lever to rotate has the keyway that cooperates with key on the cooresponding inner periphery of orienting sleeve; One end of the nearly limit switch of described push rod is connected with push pedal.

Because adopt said structure, a kind of pipe sling arm inhibiting device with buffer gear of the utility model has following beneficial effect:

Both ends of the spring in the utility model is connected with locating bush with mount pad respectively, when winch draws arm when fulcrum turns to a certain position, the arm crossbeam contacts with the push rod of shock absorber, and by the push rod compression spring, spring is also given antagonistic force of arm simultaneously, so also corresponding slowing down of velocity of rotation of arm, when arm is rotated further, push rod continues compression spring, and limit switch is run in the push pedal on the push rod at this moment, limit switch is cut off the electricity supply, and winch then stops operating; When arm reached the limit of the position because of effect of inertia is rotated further, the rubber cushion on the push rod step contacted with orienting sleeve, and push rod can not remake axial motion, and arm can not rotate again.Therefore, compare with conventional device, the utility model not only can make the effective buffer limit of arm, prevent that loop wheel machine from tumbling, and avoids arm to bear bigger impact load and be damaged, both prolong the service life of pipe sling, improved the service efficiency of pipe sling again.

Below, the technical characterictic to a kind of pipe sling arm inhibiting device with buffer gear of the utility model is further described in conjunction with the accompanying drawings and embodiments.

[description of drawings]

Fig. 1: the structural representation (semi-sictional view) of a kind of pipe sling arm inhibiting device with buffer gear of the utility model.

Among the figure:

Push pedal 1, limit switch 2, push rod 3, key 4, cover plate 5, arm 6, pin 7, locating bush 8, spring 9, mount pad 10, rubber cushion 11, orienting sleeve 12, adapter plate 13.

[specific embodiment]

Embodiment:

A kind of pipe sling arm inhibiting device with buffer gear, see Fig. 1, comprise push rod 3, spring 9, mount pad 10 and limit switch 2, the mount pad two ends connect cover plate 5 and orienting sleeve 12 respectively, the push rod 3 that is with spring is installed in the mount pad, the two ends of push rod are passed orienting sleeve 12 and cover plate 5 respectively and can be made axial motion along the mount pad axis, limit switch 2 be installed in mount pad bonded assembly adapter plate 13 on, its position is positioned at the end that push rod 3 passes orienting sleeve; One end of described push rod 3 nearly cover plates is connected with locating bush 8 by pin 7, spring 9 one ends that are enclosed within on the push rod 3 are fixed on the locating bush 8, the other end is fixed on the end that mount pad 10 connects orienting sleeve 12, and push rod 3 can drive the antagonistic force that locating bush 8 compression springs 9 are subjected to spring 9 simultaneously along the mount pad axis when the orienting sleeve direction is made axial motion; One end of described push rod 3 nearly orienting sleeves has a step, and rubber cushion 11 is installed on the step.

The key 4 that the external peripheral surface at the position that described push rod 3 cooperates with orienting sleeve 12 has an anti-throw-out lever to rotate has the keyway that cooperates with key 4 on the cooresponding inner periphery of orienting sleeve.One end of described push rod 3 nearly limit switches is connected with push pedal 1.

The principle of work of a kind of pipe sling arm inhibiting device with buffer gear of the utility model:

When arm 6 when fulcrum O rotates counterclockwise a certain angle, arm 6 contacts with push rod 3, and promotion push rod 3 is done to make axial motion along the mount pad axis to the orienting sleeve direction, push rod 3 drives locating bush 8 compression springs 9, spring 9 is given antagonistic force of arm by push rod 3 simultaneously, and arm 6 velocities of rotation are slowed down; When arm 6 is rotated further and promotes push pedal 1 on the push rod 3 and runs into limit switch 2, limit switch 2 is cut off the electricity supply, the luffing winch stops operating, because effect of inertia, arm 6 is rotated further, but making a concerted effort that arm is suffered at this moment is opposite with sense of motion, so arm has just stopped rotation in the extremely short time.When arm reaches the limit of the position because of effect of inertia is rotated further, rubber cushion 11 contacts with orienting sleeve 12, because the effect of step above the push rod 3, push rod 3 can not remake axial motion, so arm 6 is locked by force, avoided limit switch to be cut off back, the arm position that oversteps the extreme limit because of effect of inertia is rotated further and caused and tumble.Rubber cushion 11 except spacing, play the bumper and absorbing shock effect simultaneously, key 4 plays guiding and anti-throw-out lever 3 rotates.

Present embodiment is one of preferred forms of the present utility model, as the conversion of the utility model embodiment:

1. also can cancel on the push rod 3 rubber cushion 11 that is provided with, can realize the purpose that prevents that arm from tumbling equally, compare with the pipe sling shock absorber that is provided with rubber cushion 11, but its buffering and damping effect be slightly poor.

2. also can cancel the push pedal that is arranged on the push rod 3 and directly go to touch and cut off limit switch by push rod, the key 4 that this kind situation can push rod in the air be rotated, but push rod need extend, and increases cost.

3. other also belonging within the protection domain of the present utility model without prejudice to the utility model technical purpose based on the conversion on the technical scheme.

Claims

1. pipe sling arm inhibiting device with buffer gear, comprise push rod (3), spring (9), mount pad (10) and limit switch (2), the mount pad two ends connect cover plate (5) and orienting sleeve (12) respectively, the push rod (3) that is with spring is installed in the mount pad, the two ends of push rod are passed orienting sleeve and cover plate respectively and can be made axial motion along the mount pad axis, limit switch (2) be installed in mount pad bonded assembly adapter plate (13) on, its position is positioned at the end that push rod (3) passes orienting sleeve; It is characterized in that: an end of the nearly cover plate of described push rod (3) is connected with locating bush (8) by pin (7), spring (9) one ends that are enclosed within on the push rod (3) are fixed on the locating bush (8), the other end is fixed on the end that mount pad (10) connects orienting sleeve (12), and push rod (3) can drive the antagonistic force that locating bush (8) compression spring (9) is subjected to spring simultaneously along the mount pad axis when the orienting sleeve direction is made axial motion; One end of the nearly orienting sleeve of described push rod (3) has a step, and rubber cushion (11) is installed on the step.

2. a kind of pipe sling arm inhibiting device as claimed in claim 1 with buffer gear, it is characterized in that: the key (4) that the external peripheral surface at the position that described push rod (3) cooperates with orienting sleeve (12) has an anti-throw-out lever to rotate has the keyway that cooperates with key (4) on the inner periphery of orienting sleeve (12).

3. a kind of pipe sling arm inhibiting device with buffer gear as claimed in claim 1 or 2 is characterized in that: an end of the nearly limit switch of described push rod (3) is connected with push pedal (1).