Rolling device for compensating large displacements of pipelines

Abstract

The present invention discloses a rolling device for compensating large displacement of pipelines, including a spring hanger; a roller running mechanism connected to the spring hanger through a roller plate; a steel section fixedly connected to the roller running mechanism; a hanger connected to the steel section; a cross arm hinged to the hanger; the cross arm is connected to a clamp to form an integral pipe component; the clamp cooperates with the pipeline; wherein the roller running mechanism is provided with a bottom plate, and the bottom plate forms an integral frame by welding a guide side plate and a flip plate; a large bearing roller is provided below the roller plate, and the large bearing roller abuts against the bottom plate; a small guide roller is provided on the side of the roller plate, and the small guide roller abuts against the guide side plate; an anti-flip small roller is provided on the roller plate; and the anti-flip small roller abuts against the anti-flip plate. The product has good mechanical properties and dimensional stability, simple structure, and solves the situation that high-temperature pipelines in the petroleum, electric power, chemical and other industries have large horizontal displacements due to high temperature, which cannot be satisfied by the eccentric installation of the support and hanger.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical pipeline equipment, and in particular relates to a rolling device for compensating large displacement of a pipeline. Background Art

[0002] When the pipeline changes from cold to hot, the high temperature medium causes the pipeline to have large horizontal and vertical displacements. The vertical displacement can be compensated and absorbed by the support of the spring hanger, but when a large horizontal displacement occurs, it is difficult to ensure that the horizontal swing angle is within the range of 4° (Article 6.9.8 of GB / T 17116-2018). In our company's actual engineering cases, the largest horizontal displacement of the pipeline encountered in a 1.3 million tons / year propane isobutane mixed dehydrogenation unit reached 500mm, and the displacement could not be absorbed by the horizontal deflection angle of 4 degrees. On the other hand, in order to reduce costs, the suspension space of the spring cannot be too large. If the horizontal displacement needs to be compensated by the swing angle, the installation space must be at least greater than 500 / tan(4)=7150mm. This value is very large. Many chemical plants cannot provide such on-site installation conditions. Therefore, it is necessary to design a device to compensate and absorb the horizontal displacement to ensure the normal operation of the entire pipeline. Summary of the invention

[0003] The purpose of the present invention is to provide a rolling device for compensating large displacement of pipelines, so as to solve the problem of compensating large horizontal displacement of chemical pipelines. It is particularly suitable for occasions where displacement compensation cannot be solved by simply using the offset installation of spring supports and hangers. Through the coordinated use of the rolling device of the present invention and the spring, when there is horizontal displacement of the pipeline, the vertical force of the spring is decomposed through the deflection angle of the hanger to obtain horizontal force, overcome the rolling friction of the rolling device, and make the spring and the rolling device roll in a specified direction, ensuring that the force vertical line of the spring and the hanging point are within an angle range of 4° and meet the load requirements.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A rolling device for compensating large displacement of a pipeline, comprising:

[0006] A spring hanger; a roller running mechanism fixedly connected to the spring hanger via a roller plate; a steel section fixedly connected to the roller running mechanism; a hanger connected to the steel section bolts; a cross arm hinged to the hanger; the cross arm is connected to the clamp to form an integral pipe component; the clamp cooperates with the pipeline; wherein, the roller running mechanism is provided with a bottom plate, and the bottom plate forms an integral frame by welding guide side plates and a flip plate; a heavy-bearing roller is provided under the roller plate, and the heavy-bearing roller abuts against the bottom plate; a small guide roller is provided on the side of the roller plate, and the small guide roller abuts against the guide side plate; a small anti-flip roller is provided on the roller plate; the small anti-flip roller abuts against the anti-flip plate.

[0007] As the preferred technical solution of the present application, the rolling roller operating mechanism is respectively provided with two groups of heavy-bearing rollers, small guide rollers and small anti-rollover rollers, and the heavy-bearing rollers, small guide rollers and small anti-rollover rollers are symmetrically arranged about the center line of the roller plate; the small guide rollers can reduce the greater friction between the side of the roller plate and the guide side when the heavy-bearing roller is offset during rolling; the use of small anti-rollover rollers can avoid the friction caused by the spring hanger above the heavy-bearing roller being easily flipped during the rolling process because the center of gravity is not on the vertical line of the hanger.

[0008] When in use, when the large roller rolls on the bottom plate, the vertical force of the pipeline is transferred to the steel section through the spring hanger. The hanger is connected to the clamp, and the clamp transfers the load to the pipeline. When the pipeline produces horizontal displacement, the pipeline drives the transfer hanger of the clamp to swing. When a certain swing angle is reached to overcome the rolling friction, the large roller can roll along the bottom plate, and its guide small roller and anti-rollover small roller reduce friction during the overall rolling process.

[0009] As a preferred technical solution of the present application, there may be multiple load-bearing rollers.

[0010] As a preferred technical solution of the present application, a limit plate is provided on the running track of the load-bearing roller to prevent the load-bearing roller from exceeding the limit when displacing and the swing angle of the boom from exceeding the standard value.

[0011] As a preferred technical solution of the present application, the spring hanger and the roller plate are fixedly connected by hexagonal bolts.

[0012] As a preferred technical solution of the present application, reinforcing ribs are also provided on the bottom plate and the guide side plates.

[0013] As a preferred technical solution of the present application, the load-bearing roller and the bottom plate adopt steel-to-steel rolling friction, and the friction coefficient is small.

[0014] More preferably, the load-bearing roller is made of 40Cr or 45 steel, and the surface is chrome-plated or replaced by rolling bearings or balls; a composite bearing is used between the roller and the shaft.

[0015] Good corrosion resistance and low friction are the key to the design. The surface is chrome-plated for corrosion resistance to increase surface hardness. Composite bearings are used on the matching surfaces of the roller shaft and the roller to reduce friction and ensure good rolling effect.

[0016] As a preferred technical solution of the present application, the steel section is an H-shaped steel or a channel steel.

[0017] As a preferred technical solution of the present application, the spring hanger is various types of shelf-type spring hangers (variable force or constant force).

[0018] As the preferred technical solution of the present application, the clamp is obtained by integrally bending a steel plate made of a material such as 304H, or can also be connected to the pipeline using pipe components made of various materials such as pipe clamps, and then the pipe components are connected to the spring hanger through a hanger rod.

[0019] As the preferred technical solution of the present application, the bottom plate is an open structure or a closed box structure, which plays a role in dust and rain protection. Lubricating oil can be injected into the box bottom plate to improve corrosion resistance and lubrication performance.

[0020] Beneficial Effects

[0021] 1. The anti-rollover small roller and anti-rollover plate are mainly used to prevent the spring hanger from tipping over due to the instability of the structure being too high during displacement. A bearing (friction coefficient as low as 0.03) is set between the roller shaft and the roller to reduce rolling friction. The function of the guide small roller and the guide side plate is to enable the roller plate to move in the specified direction during displacement, and the friction is reduced by setting the roller. The load-bearing and functional realization of the entire bracket is achieved through the heavy-bearing roller.

[0022] 2. When the deflection angle of the hanger rod of the spring hanger connecting the pipeline reaches a certain angle (designed within 4 degrees), the force acting on the hanger rod will produce vertical and horizontal components. When the horizontal component is greater than the rolling friction force (F*tan4>F*0.03, 4 is the deflection angle of the hanger rod, and 0.03 is the rolling friction coefficient), the rolling plate and the spring hanger will move in the specified direction under the action of each roller, thereby ensuring that the deflection angle of the hanger rod of the spring hanger is always within 4 rolls, compensating for large horizontal displacement, meeting the force requirements, and ensuring the safe operation of the pipeline;

[0023] 3. This product has good mechanical properties and dimensional stability, simple structure, easy manufacturing, and can effectively solve the situation in the petroleum, electric power, chemical industry and other industries where large horizontal displacement due to high temperature can not be met by bracket offset installation;

[0024] 4. Easy to process and shape, with obvious advantages in production cycle, and simple and efficient installation on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall installation structure of the rolling device described in the present invention;

[0026] Figure 2 It is a front view of the detailed structure of the rolling device described in the present invention;

[0027] Figure 3 It is a left view of the detailed structure of the rolling device described in the present invention;

[0028] Figure 4 A top view of the detailed structure of the rolling device described in the present invention;

[0029] Figure 5 Schematic diagram of on-site installation and application of rolling device;

[0030] Among them: 1- small anti-rollover roller; 2- anti-rollover plate; 3- guide side plate; 4- small guide roller; 5- reinforcing rib; 6- bottom plate; 7- roller plate; 8- limit plate; 9- heavy load-bearing roller; 10- hanging rod; 11- cross arm (channel steel); 12- spring hanger; 13- steel section (on-site foundation); 14- basket nut; 15- locking flat nut; 16- U-shaped nut; 17- connecting bolt A; 18- connecting bolt B; 19- clamp; 20- roller support ear plate; 21- roller shaft. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Example 1

[0033] refer to Figure 1-Figure 5 , a rolling device for compensating large displacement of a pipeline, comprising:

[0034] Spring hanger 12; a roller running mechanism fixedly connected to the spring hanger 12 through a roller plate 7; the roller running mechanism is provided with a bottom plate 6, and the bottom plate 6 forms an overall frame by welding the guide side plate 3, the flip plate 2 and the reinforcing ribs 5; after the bottom plate 6 determines the displacement direction, the spring hanger 12 and the roller plate 7 are connected and positioned by hexagonal bolts, leaving enough displacement; a load-bearing roller 9 is provided under the roller plate 7, and the load-bearing roller 9 abuts against the bottom plate 6; a guide small roller 4 is provided on the side of the roller plate 7, and the guide small roller 4 abuts against the guide side plate 3; an anti-flip small roller 1 is provided on the roller plate 7; the anti-flip small roller 1 abuts against the anti-flip plate 2; the roller plate 7 assembles and fixes the load-bearing roller 9, the anti-flip small roller 1 and the guide small roller 4 by welding the roller support ear plate 20 and the roller shaft 21, and a composite bearing is assembled between the roller and the roller shaft to reduce friction;

[0035] The base plate 6 is welded and fixed to the steel section 13; the hanger 10 is bolted to the steel section 13; the cross arm 11 is hinged to the hanger 10; the cross arm is located above the pipeline, and the clamp 19 is connected to the cross arm 11 by 4 bolts B18 to form an integral pipe component; the clamp 19 cooperates with the pipeline; the cross arm 11 is then connected to the hanger 10 by connecting bolts A17, fixed by U-shaped nuts 16, and the hanger 10 is tightened by rotating the basket nut 14, and then locked by locking the flat nut 15. If the pipeline does not need to be subjected to water pressure test, the locking device of the spring hanger 12 can be removed and put into operation.

[0036] The rolling roller operating mechanism is respectively provided with two groups of heavy-bearing rollers 9, small guide rollers 4 and small anti-rollover rollers 1, and the heavy-bearing rollers 9, small guide rollers 4 and small anti-rollover rollers 1 are symmetrically arranged with the roller plate 7; the small guide rollers 4 can reduce the friction between the side of the roller plate 7 and the guide side edge 3 when the heavy-bearing rollers 9 are offset during the rolling process; the anti-rollover small rollers 1 can avoid the friction caused by the spring hanger 12 above the heavy-bearing rollers 9 being easily flipped during the rolling process because the center of gravity is not on the vertical line of the hanger.

[0037] A limit plate 8 is provided on the running track of the heavy-bearing roller 9 to prevent the heavy-bearing roller 9 from exceeding the limit when displacing and the swing angle of the suspension rod 10 exceeding the standard value; the heavy-bearing roller 9 and the base plate 6 adopt steel-to-steel rolling friction, and the friction coefficient is small; and the heavy-bearing roller 9 is made of 40Cr or 45 steel, and the surface is chrome-plated or replaced by rolling bearings and balls; a composite bearing is used between the roller and the shaft.

[0038] The steel section 13 (on-site foundation) and the cross arm 11 are H-shaped steel or channel steel; the spring hanger 12 is various types of shelving spring hangers (variable force or constant force); the clamp 19 is obtained by integrally bending a steel plate made of 304H or other materials, or can also be connected to the pipeline using pipe components made of various materials such as pipe clamps, and then the pipe components are connected to the spring hanger 12 through the hanger 10; the base plate 6 is an open structure or a closed box structure, which plays a role in dust and rain protection, and lubricating oil can be injected into the box base plate to improve corrosion resistance and lubrication performance.

[0039] When in use, when the large roller 9 rolls on the base plate 6, the vertical force of the pipeline is transmitted to the steel section 13 through the spring hanger 10. The hanger 10 is connected to the clamp 19, and the clamp 19 realizes the load transmission effect on the pipeline. When the pipeline produces horizontal displacement, the pipeline drives the clamp 19 to transfer the hanger to swing. When a certain swing angle is reached to overcome the rolling friction, the large roller 9 can roll along the base plate 6, and its guide small roller 4 and anti-flip small roller 1 reduce the friction during the overall rolling process.

[0040] The protection content of the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the inventive concept, changes and advantages that can be thought of by those skilled in the art are included in the present invention and are protected by the attached claims.

Claims

1. A rolling device for compensating large displacement of a pipeline, characterized in that: include: A spring hanger (12); a roller running mechanism fixedly connected to the spring hanger (12) via a roller plate (7); a steel section (13) fixedly connected to the roller running mechanism; a hanger (10) bolted to the steel section (13); a cross arm (11) hinged to the hanger (10); the cross arm (11) is connected to a clamp (19) to form an integral pipe component; the clamp cooperates with the pipeline; wherein the roller running mechanism is provided with a bottom plate (6), the bottom plate (6) is formed into an integral frame by welding a guide side plate (3) and a flip plate (2); a load-bearing roller (9) is provided below the roller plate (7), the load-bearing roller (9) abuts against the bottom plate (6); a guide small roller (4) is provided on the side of the roller plate (7), and the guide small roller (4) abuts against the guide side plate (3); an anti-flip small roller (1) is provided on the roller plate (7); the anti-flip small roller (1) abuts against the anti-flip plate (2).

2. The rolling device for compensating large displacement of a pipeline according to claim 1, characterized in that: The roller running mechanism is provided with two groups of heavy-load bearing rollers (9), small guide rollers (4) and small anti-turnover rollers (1), respectively. The heavy-load bearing rollers (9), small guide rollers (4) and small anti-turnover rollers (1) are symmetrically arranged about the center line of the roller plate (7).

3. The rolling device for compensating large displacement of a pipeline according to claim 1, characterized in that: A limit plate (8) is provided on the running track of the load-bearing roller to prevent the load-bearing roller (9) from exceeding the limit when displacing and the swing angle of the suspension rod (10) from exceeding the standard value.

4. The rolling device for compensating large displacement of a pipeline according to claim 1, characterized in that: The load-bearing roller (9) is made of 40Cr or 45 steel, and its surface is chrome-plated or uses rolling bearings or balls.

5. The rolling device for compensating large displacement of a pipeline according to claim 1, characterized in that: The spring hanger (12) is fixedly connected to the roller plate (7) via hexagonal bolts.

6. The rolling device for compensating large displacement of a pipeline according to claim 1, characterized in that: Reinforcing ribs (5) are also provided on the bottom plate (6) and the guide side plate (3).

7. The rolling device for compensating large displacement of a pipeline according to claim 1, characterized in that: The steel section (13) is an H-shaped steel section or a channel steel section.

8. The rolling device for compensating large displacement of a pipeline according to claim 1, characterized in that: The spring hanger (12) is a shelf-type spring hanger.

9. The rolling device for compensating large displacement of a pipeline according to claim 1, characterized in that: The clamp (19) is obtained by integrally bending a steel plate or by using a pipe component to connect with a pipeline.

10. The rolling device for compensating large displacement of a pipeline according to claim 1, characterized in that: The bottom plate (6) is an open structure or a closed box structure.

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