WO2021082513A1

WO2021082513A1 - Method for maintaining large-displacement modular expansion device

Info

Publication number: WO2021082513A1
Application number: PCT/CN2020/100543
Authority: WO
Inventors: 郑敏霞; 王庆雄; 赵强; 汤嵩
Original assignee: 南京毛勒工程材料有限公司
Priority date: 2019-11-01
Filing date: 2020-07-07
Publication date: 2021-05-06
Also published as: CN110804946A

Abstract

A method for maintaining a large-displacement modular expansion device. Jacking tools are connected to an intermediate beam (2) to be maintained to jack the intermediate beam (2) for maintenance. After the maintenance is completed, the jacking tools are removed and the intermediate beam (2) automatically returns to the original position. The jacking tools comprise jacks (1, 7), a long steel beam (6), a short steel beam (5) having through holes (11), four screws (3) and nuts (4) matched with the screws, and a C-shaped steel of which one end is provided with screw holes matched with the screws (3). The method does not require the replacement of the entire expansion device, and the consumed time is short.

Description

Maintenance method for large displacement modulus telescopic device

Technical field

The invention belongs to the technical field of bridge expansion devices, and in particular relates to a maintenance method for large displacement modulus expansion devices.

Background technique

With the increase of domestic bridges and super-large bridges, the use of large-displacement modular expansion devices is also increasing. The bridge expansion device needs to meet the needs of the bridge's longitudinal, lateral, and vertical displacement and corners caused by temperature changes, hurricanes, vehicles, earthquakes and other conditions. It is a structural protection product that bears the largest dynamic load in the bridge structure. It must withstand varying values. Various complex dynamic loads or impacts; at the same time, it must be subjected to fatigue, abrasion, and various chemical and physical erosions. It is a very important shock-absorbing and isolating device to protect the bridge structure. Therefore, the scientific and reasonable maintenance of the large-displacement modular expansion device is beneficial to prolong the service life of the expansion device and maximize the value of the expansion device. However, in the past, there was no maintenance for the large-displacement modulus telescopic device, which shortened the life of the large-displacement modulus telescopic device and increased the cost.

Summary of the invention

In order to solve the above-mentioned problem that the conventional large-displacement modulus telescopic device has no maintenance and affects the service life of the device, the present invention provides a simple and convenient maintenance method for the large-displacement modulus telescopic device.

The maintenance method of the large displacement modulus telescopic device of the present invention is characterized in that it includes:

Step 1. Prepare lifting tools;

Step 2: Connect the jacking tool to the middle beam to be maintained in the large displacement modular expansion device;

Step three, implement jacking operation, push the middle beam to be maintained out of the large-displacement modulus telescopic device;

Step 4: Maintain the ejected middle beam to be maintained;

Step 5. After the maintenance is completed, the jacking tool is removed, and the ejected middle beam to be maintained automatically returns to the original position of the large displacement modulus telescopic device.

Preferably, in step 1, the jacking tool includes the following components: one or two jacks, a long steel beam, two short steel beams with through holes at both ends, four screws and a number of matching Nuts and four C-shaped steels with screw holes matched with the screw at one end.

Preferably, the components are assembled as follows: the lower ends of the four C-shaped steels are buckled in the cavity of the middle beam, the upper ends are threadedly connected with the lower ends of the four screw rods, and the four screw rods pass through the four through holes of the two short steel beams. , Use nuts to fasten the screws on both sides of the through hole, place a jack on the middle beam, and place a long steel beam on the jack. The long steel beam is located below the middle of the two short steel beams and is perpendicular to the short steel beam.

Preferably, when there are two jacks and the short steel beam is located in the middle of the two jacks, the lower ends of the four C-shaped steels are buckled in the cavities on both sides of the middle beam to be maintained, and the middle beam to be maintained is pulled out after being lifted. .

Preferably, when the jack is one and is located between two short steel beams, the lower ends of the four C-shaped steels are buckled in the cavity on the corresponding side of the middle beam on both sides of the middle beam to be maintained. Eject the middle beam to be maintained downward.

Beneficial effects: The present invention uses a combination of commonly used tools to realize the lifting of the middle beam to be maintained in the large-displacement modulus telescopic device and complete the maintenance, which greatly improves the life of the large-displacement modulus telescopic device and increases economic benefits. At the same time, the operating tools are simple, easy to operate, and efficient.

Description of the drawings

Fig. 1 is a schematic diagram of lifting up the intermediate beam to be maintained in the maintenance method of the present invention;

Fig. 2 is a schematic diagram of pushing the middle beam to be maintained downward in the maintenance method of the present invention;

Fig. 3 is a schematic diagram along line A-A in Fig. 2;

Figure 4 is a schematic diagram of the structure of a short steel beam;

In the figure, 1. Jack; 2. Middle beam to be maintained; 3. Screw; 4. Nut; 5. Short steel beam; 6. Long steel beam; 7. Jack; 8. Sliding support; 9. Rubber strip; 10. Sliding spring; 11. Through hole.

Detailed ways

The technical solutions of the present invention will be described in detail below through embodiments, but the protection scope of the present invention is not limited to the embodiments.

The present invention is a maintenance method for a large-displacement modular telescopic device, which is characterized in that it includes:

Step 1. Prepare lifting tools;

Step 2: Connect the jacking tool to the middle beam 2 to be maintained in the large displacement modular expansion device;

Step 3: Carry out the lifting operation, and push the middle beam 2 to be maintained out of the large-displacement modular expansion device;

Step 4: Maintain the ejected middle beam 2 to be maintained;

Step 5. After the maintenance is completed, the jacking tool is removed, and the ejected middle beam 2 to be maintained automatically returns to the original position of the large-displacement modular expansion device.

The jacking tool includes the following components: one or two jacks 1 (7), a long steel beam 6, two short steel beams 5 with through holes 11 at each end, four screw rods 3 and a number of matching screws The cap 4 and four C-shaped steels with screw holes matching the screw 3 at one end. The components are assembled as follows: the lower ends of the four C-shaped steels are buckled in the cavity of the middle beam, and the upper ends are respectively screwed to the lower ends of the four screws 3, and the four screws 3 pass through the four through holes of the two short steel beams 5. 11. Use nuts 4 to fasten the screws 3 on both sides of the through hole 11, place jack 1 (7) on the middle beam, and place the long steel beam 6 on the jack 1 (7). The long steel beam 6 is located on the two short beams. The middle part of the steel beam 5 is below and perpendicular to the short steel beam 5. The types of the above-mentioned long steel beam 6 and short steel beam 5 are not particularly limited as long as the bearing capacity is sufficient. Generally, the long steel beam 6 uses I-beam steel, and the short steel beam 5 uses square steel.

When there are two jacks and the short steel beam 5 is located between the two

jacks

1 and 7, the lower ends of the four C-shaped steels are buckled in the cavities on both sides of the middle beam 2 to be maintained. After being lifted, the middle beam 2 to be maintained will be maintained. Pull upwards.

When the jack is one and it is located between the two short steel beams 5, the lower ends of the four C-shaped steels are buckled in the cavity on the corresponding side of the middle beam on both sides of the middle beam 2 to be maintained. The middle beam 2 to be maintained is pushed out downward.

In the actual operation process, first assemble the jacking tool. When the sliding support 8 of the intermediate beam 2 to be maintained needs to be maintained, first remove the rubber strip 9 on the intermediate beam related to the jacking operation to expose the cavity, and lift the The two ultra-thin

hydraulic jacks

1, 7 in the lifting tool assembly are placed on the middle beams on both sides of the middle beam 2 to be maintained, and each C-shaped steel is buckled in the cavity on both sides of the middle beam 2 to be maintained. After the

hydraulic jacks

1, 7 are lifted, the long steel beam 6 is lifted, and the long steel beam 6 lifts the short steel beam 5 on it. The short steel beam 5 realizes the intermediate beam to be maintained through the screw 3 and the nut 4 2 jacking. After pulling up the intermediate beam 2 to be maintained from the large displacement modulus telescopic device for a certain distance, take out the sliding support 8 and replace it with a new sliding support 8. After the replacement is completed, the jacking is released, and the maintained intermediate beam is slow Automatically homing.

When the sliding spring 10 needs to be maintained, use an ultra-thin hydraulic jack 1 to place it on the middle beam 2 to be maintained, and buckle each C-shaped steel on the corresponding side of the other two middle beams on both sides of the middle beam 2 to be maintained In the cavity of, the long steel beam 6 is lifted by the ultra-thin hydraulic jack 1 after being lifted, but because the C-shaped steel is buckled on the two other middle beams, the fixing is firmer, so the long steel beam 6 transmits the lifting force To the short steel beam 5, the short steel beam 5 transfers the lifting force to the intermediate beam 2 to be maintained through the screw 3 and the nut 4, so that the intermediate beam 2 to be maintained is ejected downward. After the middle beam 2 to be maintained is pushed down from the large displacement modular telescopic device, take out the sliding spring 10 and replace it with a new one. After the completion, the jacking is released, and the maintained middle beam returns slowly and automatically. Bit.

As mentioned above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and details can be made without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

A maintenance method for a large-displacement modular telescopic device, which is characterized in that it comprises:

Step 1. Prepare lifting tools;

Step 2: Connect the jacking tool to the middle beam to be maintained in the large displacement modular expansion device;

Step three, implement jacking operation, push the middle beam to be maintained out of the large-displacement modulus telescopic device;

Step 4: Maintain the ejected middle beam to be maintained;

Step 5. After the maintenance is completed, the jacking tool is removed, and the ejected middle beam to be maintained automatically returns to the original position of the large displacement modulus telescopic device.
The method for maintaining a large displacement modulus telescopic device according to claim 1, wherein in step one, the jacking tool includes the following components: one or two jacks, one long steel beam, and two A short steel beam with through holes at both ends, four screw rods and a number of matching nuts, and four C-shaped steels with screw holes matching the screw at one end.
The maintenance method of a large displacement modulus telescopic device according to claim 2, wherein the components are assembled as follows: the lower end of the four C-shaped steel is buckled in the cavity of the middle beam, and the upper end is connected to the four screw rods. The lower end is threaded, the four screws pass through the four through holes of the two short steel beams, and the screws on both sides of the through holes are fastened with nuts. A jack is placed on the middle beam, and a long steel beam and long steel are placed on the jack. The beam is located below the middle of the two short steel beams and is perpendicular to the short steel beams.
The maintenance method for a large displacement modulus telescopic device according to claim 3, wherein when there are two jacks and the short steel beam is located between the two jacks, the four C-shaped steel lower ends are buckled in the middle to be maintained In the cavities on both sides of the beam, the middle beam to be maintained is pulled up after being jacked up.
The maintenance method of the large displacement modulus telescopic device according to claim 3, wherein when the jack is one and is located between two short steel beams, the lower ends of the four C-shaped steels are buckled in the to-be-maintained In the cavity on the corresponding side of the middle beam on both sides of the middle beam, the middle beam to be maintained is pushed out downward after being lifted.