CN114906754A - Pull rod replacing method - Google Patents

Abstract

The present application provides a pull rod replacement method, which is applied to a bridge crane pitch system. The bridge crane pitch system includes a pitch mechanism, a pull rod structure and a front girder. The pull rod structure includes a plurality of pull rods. The front girder is provided with a pull rod support. The pull rod and the pull rod support The seat is rotatably connected; the method includes: after the pitching mechanism controls the front beam to be raised, use channel steel to connect a plurality of pull rods respectively; after the pitch mechanism controls the front beam to be flat, remove the channel steel connecting the multiple pull rods, and release the pull rod from the pull rod Connect the support to remove each tie rod; connect the new tie rod assembly to the tie rod support, adjust the angle, and use channel steel to connect the new tie rod assembly to the front beam; after the pitch mechanism controls the front beam to rise, remove and connect the new pull rod Channel steel for components. The present application reduces construction difficulty and cost, and speeds up construction progress.

Description

A method of replacing a pull rod

technical field

The invention relates to the field of hoisting machinery maintenance and manufacturing, in particular to a method for replacing a pull rod.

Background technique

The service life of the quayside container crane is not only related to the design, but also closely related to the use environment and frequency of use. As the tie rod assembly supporting the horizontal state of the front girder, it has been subjected to heavy loads for a long time, and the girder vibration and other external factors need to be checked for cracking and wear according to the specified period. Once the damage is serious, it needs to be replaced in time. In addition, after the extension of the front girder of the bridge crane is modified and lengthened, if the stress on the tie rod exceeds the allowable stress, the tie rod also needs to be replaced. At present, the commonly used tie rod replacement method in the market is: using a modular car or laying a temporary track, and using a hoist to pull the quay crane to the rear yard. After moving to the designated position, place the quay crane on the temporary track and fix it. Use a large car to hang in the air to complete the replacement of the tie rod. After the replacement is completed, the quay crane should be moved back to its original position and the tooling removed. The above method requires the preparation of a large number of tooling, such as load-bearing beams, modular carts or temporary cart tracks, winches, water tanks, large truck cranes, etc. The construction is difficult and costly, which delays the construction progress.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a tie rod replacement method, which is used to solve the problems of difficulty in construction and high cost of the existing tie rod replacement method.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

A pull rod replacement method according to an embodiment of the present invention is applied to a bridge crane pitching system. The bridge crane pitching system includes a pitching mechanism, a pull rod structure and a front girder. The pull rod structure includes a plurality of pull rods. The front girder is provided with a pull rod support. The tie rod support is rotatably connected;

Methods include:

After the pitching mechanism controls the front girder to be raised, channel steel is used to connect multiple tie rods respectively;

After the tilting mechanism controls the front beam to be leveled, remove the channel steel connecting multiple tie rods, and release the connection between the tie rods and the tie rod support to remove the old tie rod assembly;

Connect the new tie rod assembly to the tie rod support, and use channel steel to connect the new tie rod assembly to the front frame;

After the pitching mechanism controls the front frame to rise, remove the channel steel connecting the front frame and the new tie rod assembly.

In one embodiment of the present application, the tie rod support includes a first tie rod support and a second tie rod support, and the old tie rod assembly includes:

The first tie rod, one end is connected with the first tie rod support, and the other end is connected with the front girder;

The second tie rod, one end is connected with the first tie rod support through the first pin shaft, and the other end is connected with the connecting plate through the second pin shaft;

One end of the third tie rod is connected with the second tie rod support through the third pin shaft, and the other end is connected with the connecting plate through the fourth pin shaft;

Use channel steel to connect multiple tie rods separately, including:

Use channel steel to fixedly connect the second pull rod and the third pull rod;

Use channel steel to securely connect the first and second tie rods to securely connect the old tie rod assembly to the front frame.

In one embodiment of the present application, after the pitching mechanism controls the front frame to be leveled, the channel steel connecting the plurality of tie rods is removed, including:

After the pitching mechanism controls the front frame to be leveled, the second pin is removed to rotatably connect the second pull rod and the first pull rod support;

The fourth pin is removed to rotatably connect the third tie rod with the second tie rod support.

In an embodiment of the present application, after the pitching mechanism controls the front frame to be leveled, the channel steel connecting the plurality of first tie rods is removed, including:

Remove the channel steel connecting the second pull rod and the third pull rod, and remove the channel steel connecting the first pull rod and the second pull rod.

In one embodiment of the present application, disassembling the tie rod from the tie rod support to remove the old tie rod assembly includes:

Remove the first pin and transport the second tie rod out of the construction site;

Remove the third pin and transport the third tie rod out of the construction site;

Remove the first tie rod and transport the first tie rod out of the construction site.

In an embodiment of the present application, the new tie rod assembly includes a fourth tie rod, a fifth tie rod and a sixth tie rod;

Attach the new tie rod assembly to the tie rod support, including:

Connect the fourth tie rod to the first tie rod support and the front frame respectively;

Connect the fifth pull rod to the first pull rod support;

Connect the sixth tie rod to the second tie rod support.

In one embodiment of the present application, channel steel is used to connect the new tie rod assembly to the front girder, including:

Use channel steel to fix the connection between the fifth pull rod and the sixth pull rod;

Use channel steel to securely connect the fourth and fifth tie rods to securely connect the new tie rod assembly to the front frame.

In an embodiment of the present application, after the pitching mechanism controls the front frame to be raised, the channel steel connecting the front frame and the new tie rod assembly is removed, including:

Connect the fifth pull rod to the connecting plate through the fifth pin;

Connect the sixth tie rod with the connecting plate through the sixth pin.

In an embodiment of the present application, after the pitching mechanism controls the front frame to be raised, the channel steel connecting the front frame and the new tie rod assembly is removed, including:

Remove the channel steel connecting the fourth tie rod and the fifth tie rod;

Remove the channel connecting the fifth and sixth tie rods.

The above-mentioned technical scheme of the present invention has at least one of the following beneficial effects:

1. The tie rod replacement method of the embodiment of the present invention uses channel steel to connect multiple tie rods of the old tie rod assembly to each other, so that the old tie rod assembly and the front girder are lowered together for replacement, which reduces construction difficulty and cost and improves construction efficiency;

2. In the method for replacing the tie rod according to the embodiment of the present invention, when replacing the tie rod, it is not necessary to displace the quay crane, which reduces the impact on the operation of the wharf and shortens the construction period.

Description of drawings

1 is a flowchart of a method for replacing a tie rod according to an embodiment of the present invention;

Fig. 2 is the schematic diagram of using channel steel to connect the old tie rod assembly when the front girder is raised in the tie rod replacement method according to the embodiment of the present invention;

3 is a schematic diagram of dismantling the old tie rod assembly when the front frame is put down in the tie rod replacement method according to the embodiment of the present invention;

4 is a schematic diagram of installing a new tie rod assembly when the front frame is lowered in the tie rod replacement method according to the embodiment of the present invention;

FIG. 5 is a schematic diagram of removing the channel steel connected to the second tie rod when the front frame is raised up in the tie rod replacement method according to the embodiment of the present invention.

Reference numerals: 101, front girder; 102, maintenance platform for the top of the ladder frame; 103, maintenance platform for the upper beam tie rod on the sea side; 104, the first channel steel; 105, the second channel steel; 106, the first tie rod; 107, the first Second tie rod; 108, third channel steel; 109, fourth channel steel; 110, third pull rod; 113, first pin; 114, second pin; 115, third pin; 116, fourth pin ; 202, the fourth tie rod; 203, the fifth tie rod; 204, the sixth tie rod; 205, the fifth channel; 206, the sixth channel; 207, the seventh channel; 208, the eighth channel; 210, the first Five pins; 211, the sixth pin.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of the present invention.

Unless otherwise defined, technical or scientific terms used in the present invention should have the ordinary meaning as understood by those of ordinary skill in the art to which the present invention belongs. The terms "first," "second," and similar terms used herein do not denote any order, quantity, or importance, but are merely used to distinguish different components. Likewise, "a" or "an" and the like do not denote a quantitative limitation, but rather denote the presence of at least one. Words like "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to represent the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

At present, the commonly used tie rod replacement method in the market is: using a modular car or laying a temporary track, and using a hoist to pull the quay crane to the rear yard. After moving to the designated position, place the quay crane on the temporary track and fix it. Use a large car to hang in the air to complete the replacement of the tie rod. After the replacement is completed, the quay crane should be moved back to its original position and the tooling removed. The above method requires the preparation of a large number of tooling, such as load-bearing beams, modular carts or temporary cart tracks, winches, water tanks, large truck cranes, etc. The construction is difficult and costly, which delays the construction progress. In addition, the replacement of the tie-rod type requires the cooperation of large-scale truck cranes, and the whole quay crane needs to be moved out of the temporary site, which occupies a large amount of wharf space and affects the normal operation of the wharf. In order to solve the above problems, the present invention provides a method for replacing a tie rod.

The method for replacing a tie rod according to an embodiment of the present invention is first described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, FIG. 1 is a flowchart of a method for replacing a pull rod according to an embodiment of the present invention. The method is applied to a bridge crane pitching mechanism. The bridge crane pitching mechanism includes a pitch mechanism (not shown), a pull rod structure and a front girder. The girder includes: a front girder 101 with a pitch structure, and an old tie rod assembly disposed on the front girder 101, the old tie rod assembly includes a plurality of tie rods, and a tie rod support is provided on the front girder 101, and the tie rod is rotatably connected with the tie rod support ; methods include:

S100. After the pitching mechanism controls the front girder to be raised, use channel steel to connect multiple pull rods respectively;

Specifically, in an embodiment of the present application, the pull rod support includes a first pull rod 106 support and a second pull rod 107 support, and the old pull rod assembly includes: a first pull rod 106 , a second pull rod 107 and a third pull rod 110 . One end of the first pull rod 106 is connected with the first pull rod 106 support, and the other end is connected with the front girder 101; one end of the second pull rod 107 is connected with the first pull rod 106 support through the first pin shaft 113, and the other end is connected with the second pin The shaft 114 is connected to the connecting plate; one end of the third pull rod 110 is connected to the support of the second pull rod 107 through the third pin shaft 115 , and the other end is connected to the connecting plate through the fourth pin shaft 116 .

When using channel steel to connect multiple tie rods respectively, the construction personnel can board the ladder top maintenance platform 102 on the quay crane which is horizontal with the ends of the second tie rod 107 and the third tie rod 110 and the sea level with the other end of the second tie rod 107 The platform 103 is repaired on the side beam tie rod, and the second tie rod 107 and the third tie rod 110 are fixedly connected by the third channel steel 108 and the fourth channel steel 109 at the two ends of the second tie rod 107 and the third tie rod 110 respectively; then you can use The first channel steel 104 and the second channel steel 105 are fixedly connected to the first tie rod 106 and the second tie rod 107 to fixedly connect the old tie rod assembly to the front girder 101 .

Thus, by fixedly connecting the first tie rod 106 to the second tie rod 107, and the second tie rod 107 to the third tie rod 110, the old tie rod assembly is fixedly connected to the front frame 101. When the pitch mechanism controls the front frame 101 to be lowered , the old tie rod assembly can be put down together with the front girder 101 without additional fixing, which avoids a potential safety hazard caused by the shaking of the second tie rod 107 and the third tie rod 110 whose one end is a free end.

S200. After the front frame is controlled by the pitching mechanism, remove the channel steel connecting the multiple tie rods, and release the connection between the tie rods and the tie rod support to remove the old tie rod assembly.

Specifically, in an embodiment of the present application, after the pitching mechanism controls the front girder 101 to be leveled, the construction personnel can board the front girder 101 and remove the second pin 114 so that the second pull rod 107 and the first pull rod 106 support The seat is rotatably connected; and the fourth pin 116 is removed so that the third pull rod 110 and the second pull rod 107 are rotatably connected to the support.

At this time, since the second tie rod 107 and the third tie rod 110 are in a rigid connection state along with the front frame 101 when the front frame 101 is lowered, the second tie rod 107 and the third tie rod 110 will not be connected to each other when the pitch mechanism controls the front frame 101 to lay down. The occurrence of turbulence effectively improves the construction safety. In addition, after the second pin 114 and the fourth pin 116 are removed, the second pull rod 107 and the third pull rod 110 will be rotatably connected to the first pull rod 106 support and the second pull rod 107 support respectively.

At this time, the construction personnel can remove the third channel steel 108 and the fourth channel steel 109 connecting the second tie rod 107 and the third tie rod 110, and remove the first tie rod 106 and the second tie rod 107. Channel steel 105, so that the first pull rod 106, the second pull rod 107 and the third pull rod 110 can be restored to the active state. Then the construction personnel remove the first pin shaft 113, the third pin shaft 115 and the first pull rod 106, respectively, and hoist the first pull rod 106, the second pull rod 107 and the third pull rod 110 to the trolley, and transport them to the weight by the trolley, Then, the old tie rod assembly is hoisted to the ground by a car crane to complete the dismantling of the old tie rod assembly, that is, the old tie rod. As a result, there is no need to use large-scale hoisting equipment, and there is no need to move the quay crane, which effectively reduces the difficulty and cost of construction, speeds up the construction progress, and reduces potential safety hazards.

S300. Connect the new tie rod assembly to the tie rod support, and use channel steel to connect the new tie rod assembly to the front frame.

Specifically, in an embodiment of the present application, the new tie rod assembly includes a fourth tie rod 202 , a fifth tie rod 203 and a sixth tie rod 204 ; when the construction personnel install the new tie rod assembly, the fourth tie rod assembly can be attached to the front girder 101 . The pull rod 202 is respectively connected with the first pull rod 106 support and the front girder 101; at the same time, the fifth pull rod 203 and the sixth pull rod 204 are rotatably connected with the first pull rod 106 support and the second pull rod 107 support through a pin shaft, respectively, Adjust the angle of the fifth pull rod 203 and the sixth pull rod 204 in place. Then first use the fifth channel steel 205 and the sixth channel steel 206 to connect the fifth pull rod 203 and the sixth pull rod 204 rigidly; then use the seventh channel steel 207 and the eighth channel steel 208 to connect the fourth pull rod 202 and the fifth pull rod 203 Rigid connection to securely connect the new tie rod assembly to the front frame 101 . Therefore, when the pitching mechanism controls the front frame 101 to be raised, the new tie rod assembly is rigidly connected to the front frame 101, and no movement occurs, which effectively improves the construction safety.

S400. After the pitching mechanism controls the front frame to be raised, remove the channel steel connecting the front frame and the new tie rod assembly.

Specifically, in an embodiment of the present application, after the pitching mechanism controls the front girder 101 to be raised, the construction personnel can remove the channel steel connecting the front girder 101 and the new tie rod assembly. First, before the front frame 101 is raised, the construction personnel can connect the fifth pull rod 203 to the connecting plate through the fifth pin 210 , and connect the sixth pull rod 204 to the connecting plate through the sixth pin 211 . Thereby, the fifth pull rod 203 and the sixth pull rod 204 can be installed in place.

In one embodiment of the present application, after the pitching mechanism controls the front girder 101 to be raised, the construction personnel can board the top maintenance platform 102 of the ladder frame on the quay crane that is horizontal with the ends of the second tie rod 107 and the third tie rod 110 and the maintenance platform 102 on the top of the ladder The other end of the second tie rod 107 is horizontal on the sea side, and the platform 103 is repaired, and the seventh channel steel 207 and the eighth channel steel 208 connecting the fourth tie rod 202 and the fifth tie rod 203 are removed; The fifth channel steel 205 and the sixth channel steel 206 of the six tie rods 204 . This completes the installation of the new tie rod assembly, that is, the new tie rod assembly.

In the tie rod replacement method of the embodiment of the present invention, multiple tie rods of the old tie rod assembly are connected to each other by channel steel, so that the old tie rod assembly and the front girder are lowered together for replacement, which reduces the construction difficulty and cost, and improves the construction efficiency; at the same time, In the method for replacing the tie rod according to the embodiment of the present invention, when replacing the tie rod, it is not necessary to displace the quay crane, thereby reducing the impact on the operation of the wharf and shortening the construction period.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (9)

1. A pull rod replacement method is applied to a bridge crane pitching system and is characterized in that the bridge crane pitching system comprises a pitching mechanism, a pull rod structure and a front girder, the pull rod structure comprises a plurality of pull rods, a pull rod support is arranged on the front girder, and the pull rods are rotatably connected with the pull rod support;

the method comprises the following steps:

the pitching mechanism controls the front girder to be raised, and then channel steel is used for connecting the plurality of pull rods respectively;

after the pitching mechanism controls the front girder to be laid flat, channel steel for connecting a plurality of pull rods is disassembled, and the connection between the pull rods and the pull rod support is released so as to disassemble an old pull rod assembly;

connecting a new pull rod assembly with the pull rod support, and connecting the new pull rod assembly with the front girder by using channel steel;

and after the pitching mechanism controls the front girder to be raised, the channel steel connecting the front girder and the new pull rod assembly is dismounted.

2. The tie rod replacement method of claim 1, wherein the tie rod support comprises a first tie rod support and a second tie rod support, the old tie rod assembly comprising:

one end of the first pull rod is connected with the first pull rod support, and the other end of the first pull rod is connected with the front girder;

one end of the second pull rod is connected with the first pull rod support through a first pin shaft, and the other end of the second pull rod is connected with the connecting plate through a second pin shaft;

one end of the third pull rod is connected with the second pull rod support through a third pin shaft, and the other end of the third pull rod is connected with the connecting plate through a fourth pin shaft;

use the channel-section steel to connect a plurality of pull rods respectively, include:

fixedly connecting the second pull rod and the third pull rod by using channel steel;

and fixedly connecting the first pull rod and the second pull rod by using channel steel to fixedly connect the old pull rod assembly with the front girder.

3. The method of claim 2, wherein the removing a channel connecting a plurality of tie rods after the pitching mechanism controls the front frame to be flat comprises:

after the pitching mechanism controls the front girder to be laid flat, the second pin shaft is detached so that the second pull rod is rotatably connected with the first pull rod support;

and removing the fourth pin shaft to enable the third pull rod to be rotatably connected with the second pull rod support.

4. The method of claim 3, wherein the removing a channel connecting the first plurality of tie rods after the pitching mechanism controls the front frame to lie flat comprises:

and dismantling channel steel connecting the second pull rod and the third pull rod, and dismantling the channel steel connecting the first pull rod and the second pull rod.

5. The tie rod replacement method of claim 4, wherein disconnecting the tie rod from the tie rod support to remove the old tie rod assembly comprises:

the first pin shaft is dismantled, and the second pull rod is transported out of a construction site;

removing the third pin shaft, and transporting the third pull rod out of a construction site;

and dismantling the first pull rod, and conveying the first pull rod out of a construction site.

6. The tie rod replacement method of claim 4, wherein the new tie rod assembly includes a fourth tie rod, a fifth tie rod, and a sixth tie rod;

connecting a new tie rod assembly to the tie rod support, comprising:

connecting the fourth pull rod with the first pull rod support and the front girder respectively;

connecting the fifth pull rod with the first pull rod support;

and connecting the sixth pull rod with the second pull rod support.

7. The tie rod replacement method of claim 6, wherein connecting the new tie rod assembly to the front longeron using a channel, comprises:

fixedly connecting the fifth pull rod and the sixth pull rod by using channel steel;

and fixedly connecting the fourth pull rod and the fifth pull rod by using channel steel to fixedly connect a new pull rod assembly with the front girder.

8. The method of claim 7, wherein removing a channel connecting the front girder and the new drawbar assembly after the pitch mechanism controls the front girder to be raised comprises:

connecting the fifth pull rod with the connecting plate through a fifth pin shaft;

and connecting the sixth pull rod with the connecting plate through a sixth pin shaft.

9. The method of claim 8, wherein removing a channel connecting the front girder and the new drawbar assembly after the pitch mechanism controls the front girder to be raised comprises:

dismantling a channel steel for connecting the fourth pull rod and the fifth pull rod;

and dismantling channel steel for connecting the fifth pull rod and the sixth pull rod.

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