CN219409033U - Device for replacing balance Liang Jiaodian bearing of gantry crane - Google Patents

Abstract

The utility model discloses a device for replacing a hinge point bearing of a balance beam of a gantry crane, which comprises a jack, a bracket and an overhaul platform, wherein the bracket is fixed on one side of the upper end of an upper rotating column of the gantry crane, the jack is vertically arranged on the upper part of the bracket, a top rod of the jack corresponds to the lower surface of the balance beam of the gantry crane, and the overhaul platform is positioned below the jack and the bracket and is fixedly connected with the side part of the upper rotating column of the gantry crane. According to the utility model, the balance beam and the balance beam support disconnected with the upper rotating column are jacked by the jack, so that the horizontal hinge shaft and the hinge point bearing are dismounted after being unloaded, and the replacement of the balance beam hinge point bearing and related accessories is realized on the premise of not dismounting balance, thereby greatly simplifying the operation, reducing the maintenance workload, saving the high cost of using the floating crane and reducing the maintenance cost of equipment.

Description

Device for replacing balance Liang Jiaodian bearing of gantry crane

Technical Field

The utility model relates to a device capable of replacing a hinge point bearing of a balance beam of a portal crane under the condition that the balance beam is not completely removed, and belongs to the technical field of cranes.

Background

The balance beam system of the gantry crane comprises a balance beam 1, a balance beam support 2 and a small pull rod 9 (see figures 1 and 3), wherein the balance beam 1 is arranged in a left-right mode and is parallel to each other, one ends of the balance beam 1 and the small pull rod are fixedly connected together through a balance Liang Yuantong, the middle part of each balance beam 1 is hinged with the balance beam support 2 arranged on an upper rotating column 12 of the gantry crane through a horizontal hinge shaft 6 and a hinge point bearing, the hinge point bearing is arranged in a bearing hole on the balance beam 1, the other end of the balance beam 1 is connected with an amplitude changing mechanism 13 of the gantry crane through the small pull rod 9, the balance Liang Yuantong plays a role of counterweight, and the amplitude changing mechanism 13 drives the balance beam 1 to rotate around the horizontal hinge shaft 6 through the small pull rod 9 when the gantry crane is operated. The balance beam 1 is used as an important part of the portal crane, and the hinge point bearing of the balance beam is damaged due to impact, improper maintenance and other reasons in the use process, so that the normal operation of the whole balance beam system is affected, and once the hinge point bearing is damaged, the hinge point bearing must be replaced.

After the hinge point bearing of the balance beam is damaged, the traditional replacement method is to remove all the two balance beams, hoist the balance beams to the ground by using a floating crane, and reinstall the balance beams after the bearing is replaced. The replacement method has the defects that a floating crane is required to be used, the operation is quite complex, the maintenance cost is too high, and the safety risk is high. It is therefore a matter of the skilled person to easily and safely replace the balance Liang Jiaodian bearing.

Disclosure of Invention

The utility model aims at overcoming the defects of the prior art, and provides a device for replacing a balance Liang Jiaodian bearing of a gantry crane, so that the balance Liang Jiaodian bearing can be conveniently and safely replaced, and the maintenance cost of equipment is reduced.

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

the utility model provides a device for changing gantry crane compensating beam hinge point bearing, includes jack, support and maintenance platform, the support is fixed in one side of gantry crane's upper swivel post upper end, the jack is vertical to be placed on support upper portion, and the ejector pin of jack corresponds with gantry crane's compensating beam's lower surface, maintenance platform is located the below of jack and support and with gantry crane's lateral part fixed connection.

According to the device for replacing the hinge point bearing of the balance beam of the portal crane, the cushion block is arranged between the jack and the bracket.

According to the device for replacing the hinge point bearing of the balance beam of the gantry crane, the support is located at one side, far away from the small pull rod, of the upper end of the upper rotating column of the gantry crane.

The device for replacing the balance Liang Jiaodian bearing of the gantry crane further comprises a chain block, wherein the chain block is positioned between the balance beam support and the small pull rod of the gantry crane and hung on the balance beam, and the lifting hook of the chain block is connected with the balance beam support.

The device for replacing the balance Liang Jiaodian bearing of the portal crane further comprises a supporting bar, one end of the supporting bar is rotationally connected with the balance Liang Yuantong, the other end of the supporting bar is rotationally connected with a supporting bar connecting seat on an upper rotating column of the portal crane through a pin shaft, and a pin hole matched with the pin shaft on the supporting bar connecting seat is a long round hole or a round hole with the diameter larger than that of the pin shaft.

According to the utility model, the balance beam and the balance beam support disconnected with the upper rotating column are jacked by the jack, so that the horizontal hinge shaft and the hinge point bearing are dismounted after being unloaded, and the replacement of the balance beam hinge point bearing and related accessories is realized on the premise of not dismounting balance, thereby greatly simplifying the operation, reducing the maintenance workload, saving the high cost of using the floating crane and reducing the maintenance cost of equipment.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic view of a gantry crane;

fig. 2 is a schematic view of a balance beam structure, wherein fig. 2 (a) is a front view and fig. 2 (b) is a left side view;

FIG. 3 is a schematic view of the installation of a balance beam;

FIG. 4 is a schematic diagram of the structure of the present utility model; .

In the figure: 1. a balance beam; 2. a balance beam support; 3. a jack; 4. a cushion block; 5, a bracket; 6. a horizontal hinge shaft; 7. an operating platform; 8. chain block; 9. a small pull rod; 10. balance Liang Yuantong; 11. a supporting bar; 12. an upper swivel post; 13. an amplitude variation mechanism; 14. the balance beam support is connected with the upper rotating column through a welding line; 15. and a supporting bar connecting seat.

Description of the embodiments

Aiming at the problems existing in the prior art, the utility model provides a device for replacing the hinge point bearing of the balance beam of the portal crane, by using the device, the construction difficulty can be reduced, the operation process is simplified, the replacement of the hinge point bearing can be completed under the condition that two balance beams are not dismantled, the balance beam is not required to be hoisted to the ground by using a floating crane in the whole process, and the equipment maintenance cost is greatly reduced.

Referring to fig. 3 and 4, the utility model mainly comprises a supporting bar 11, an overhaul platform 7, a bracket 5, a cushion block 4, a jack 3 and a chain block 8. The balance beam system of the portal crane mainly comprises a balance beam 1, a balance beam support 2 and a small pull rod 9, wherein the system is in a balance state in the operation process. The hinge point bearing of one balance beam 1 is replaced each time by using the device, and if only one hinge point bearing is damaged, the hinge point bearing is replaced; if the hinge point bearings of the two balance beams are damaged at the same time, one hinge point bearing is replaced firstly, and then the other hinge point bearing is replaced. When the hinge point bearing of one balance beam 1 is replaced, the other balance beam 1 is still arranged on the balance beam support 2 on the upper rotating column 12, so that the two balance beams can not fall. The step of replacing the balance Liang Jiaodian bearing of the gantry crane by using the device is as follows:

and step 1, operating an amplitude changing mechanism 13 of the portal crane to keep the bottom plane of the balance beam horizontal, so as to facilitate the lifting of the jack 3 (see figure 4). One end of the supporting bar 11 is connected with the balance Liang Yuantong 10 of the portal crane, the other end of the supporting bar is connected with the supporting bar connecting seat 15 on the upper rotating column 12 of the portal crane through a pin shaft, the aperture of a pin hole matched with the pin shaft on the supporting bar connecting seat 15 is properly enlarged, or the pin hole is made into a long round hole, so that the balance beam can slightly rise under the driving of the jack 3. The function of the supporting bar 11 is mainly to cope with emergency, when the balance beam is out of balance, the supporting bar plays a supporting role on the balance Liang Yuantong, the safety of the system is ensured, and the supporting bar 11 is not stressed in the normal hinge point bearing replacement process. The two balance beams 1 are of symmetrical structures, when the hinge point bearing of one balance beam is replaced, the other balance beam can play a role in limiting the hinge point to move greatly, and when the balance beam is lifted by the jack, the balance beam cannot tip over and fall.

And 2, welding an operation platform 7 on the upper rotating column 12 at a position which is 1.5 meters away from the horizontal hinge shaft.

And 3, welding the bracket 5 on the upper rotating column 12, wherein the bracket 5 is wedge-shaped and is formed by welding triangular steel plates, and the upper surface of the bracket is parallel to the bottom of the balance beam support 2. The pad 4 is placed on the support 5 and kept horizontal. And placing the jack 3 above the cushion block 4, and operating the jack 3 to ensure that the plane difference between the jack 3 and the bottom of the balance beam is 20mm.

And 4, planing a welding seam 14 for connecting the balance beam support and the upper rotary column, and operating the jack 3 to lift the balance beam horizontal plane, wherein the balance beam support 2 and the balance beam 1 are connected through the horizontal hinge shaft 6 and the hinge point bearing and can lift together. When the balance beam support 2 leaves the upper swivel post by 10mm, the horizontal hinge shaft 6 is pulled out, and the balance beam support 2 falls back to the original position at this time.

And 5, as the other balance beam 1 is not dismantled, the balance beam support 2 arranged on the upper rotating column 12 of the portal crane is still hinged through the horizontal hinge shaft 6 and the hinge point bearing, and the two balance beams 1 are rigidly connected through the balance Liang Yuantong, so that the lifting height of the maintained balance beam 1 is limited and cannot be completely separated from the balance beam support 2, the balance beam support 2 shields the bearing holes on the balance beam 1, the hinge point bearing of the balance beam cannot be disassembled at the moment, and the hinge point bearing can be replaced after the balance beam support 2 is pulled out. A hand hoist 8 is hung on the balance beam 1 at a position close to the small pull rod 9, the balance beam support 2 is pulled by the hand hoist 8, so that the balance beam support 2 moves transversely, a bearing hole is exposed, and then a bearing is disassembled; and then the balance beam support 2 is pulled back to the original position, the horizontal hinge shaft 6 is penetrated, and finally the balance beam support 2 is welded on the upper rotating column 12 again, so that the replacement of the balance beam hinge point bearing is completed.

Claims (5)

1. A device for changing hinge point bearing of balance beam of gantry crane, which is characterized by comprising a jack (3), a support (5) and an overhaul platform (7), wherein the support (5) is fixed on one side of the upper end of an upper rotating column (12) of the gantry crane, the jack (3) is vertically arranged on the upper part of the support (5), a top rod of the jack (3) corresponds to the lower surface of the balance beam (1) of the gantry crane, and the overhaul platform (7) is positioned below the jack (3) and the support (5) and is fixedly connected with the side part of the upper rotating column (12) of the gantry crane.

2. Device for replacing a hinge point bearing of a balance beam of a gantry crane according to claim 1, characterized in that a spacer (4) is arranged between the jack (3) and the support (5).

3. Device for changing the hinge point bearing of the balance beam of a gantry crane according to claim 2, characterized in that the bracket (5) is located on the side of the upper end of the upper swivel post (12) of the gantry crane remote from the small drawbar (9).

4. A device for replacing a balance beam hinge point bearing of a gantry crane according to any one of claims 1-3, further comprising a chain block (8), wherein the chain block (8) is located between a balance beam support (2) and a small pull rod (9) of the gantry crane and is suspended on the balance beam (1), and a hook of the chain block (8) is connected to the balance beam support (2).

5. The device for replacing a hinge point bearing of a balance beam of a gantry crane according to claim 4, further comprising a supporting bar (11), wherein one end of the supporting bar (11) is rotatably connected with a balance Liang Yuantong (10), the other end of the supporting bar is rotatably connected with a supporting bar connecting seat (15) on an upper rotating column (12) of the gantry crane through a pin shaft, and a pin hole matched with the pin shaft on the supporting bar connecting seat (15) is a long round hole or a round hole with a diameter larger than the diameter of the pin shaft.