High-pressure-resistant reducing pipeline

Abstract

The utility model is applicable to the technical field of pipelines, and provides a high-pressure-resistant reducing pipeline which comprises a thick-diameter pipe, and a first flange plate with a plurality of through holes is arranged at one end of the thick-diameter pipe; the first flange plate is provided with a matched second flange plate; the second flange plate is arranged at the large-caliber end of the reducer pipe in a sleeving mode. Threaded holes with the same number as the through holes in the first flange plate are formed in the second flange plate; the first flange plate and the second flange plate are connected through locking bolts matched with the threaded holes. A first sealing ring is arranged between the first flange plate and the second flange plate; a first external thread is arranged at the small-caliber end of the reducer pipe; the second flange plate is provided with second external threads; the first external thread is matched with the first internal thread of the sleeve; and the second internal thread of the sleeve is matched with the second external thread, so that the two pipelines can be connected without professional welding equipment during the connection construction of the pipelines, the sleeve can provide support for the reducing pipe section, and the strength of the reducing pipe section is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipelines, in particular to a high-pressure resistant reducing pipe. Background Art

[0002] A reducing pipe is a relatively commonly used pipe fitting. Its main feature is that the diameters of both ends of the pipe body are different, and it can be used for connecting two different pipe diameters. During the current pipeline construction process, its usage demand is extremely large, and it plays a very important role in pipeline construction such as daily life, industrial production, and fire safety.

[0003] The existing reducing pipes often adopt a welded connection form when connecting. During construction, professional welding equipment is often required, and professional welders are also needed for welding work. The construction method of welded connection is relatively difficult. During the welding process, the staff needs to be fully concentrated, which requires high requirements for the staff. Once a welding mistake occurs, it will affect the structural strength of the welded part of the pipe fitting at least, and cause the scrapping of the pipe fitting at most.

[0004] Most of the existing reducing pipes are of single-layer design. During the long-term use of the reducing pipe, the reduced-diameter pipe section is prone to tearing due to long-term stress and aging. The splashing of high-pressure liquid in the pipeline is likely to cause injuries to personnel and a large amount of waste of high-pressure liquid. Content of the Utility Model

[0005] Aiming at the above defects, the purpose of the utility model is to provide a high-pressure resistant reducing pipe, which changes the connection method between the reducing pipe and the ordinary pipe. During the connection construction of the pipeline, the connection between the two pipes can be carried out without using professional welding equipment. The setting of the sleeve can provide support for the reduced-diameter pipe section, enhance the strength of the reduced-diameter pipe section. At the same time, as a secondary protection, the sleeve can avoid the splashing of high-pressure liquid caused by the sudden rupture of the reduced-diameter pipe section, which may hurt people and cause a large amount of waste of high-pressure liquid.

[0006] To achieve the above purpose, the utility model provides a high-pressure resistant reducing pipe, including a thick-diameter pipe. One end of the thick-diameter pipe is provided with a first flange with a number of through holes; a second flange is provided to cooperate with the first flange; the second flange is sleeved on the thick-caliber end of the reducing pipe; the second flange is provided with threaded holes equal in number to the through holes on the first flange; the first flange and the second flange are connected by locking bolts that cooperate with the threaded holes; a first sealing ring is arranged between the first flange and the second flange; the thin-caliber end of the reducing pipe is provided with a first external thread; the second flange is provided with a second external thread; the first external thread cooperates with the first internal thread of the sleeve; the second internal thread of the sleeve cooperates with the second external thread.

[0007] According to the high-pressure resistant reducing pipe of the present utility model, a groove is provided on the side of the second flange plate close to the first flange plate; an E-shaped sealing ring is provided in the groove; the E-shaped sealing ring is matched with the thick-diameter pipe; a margin for matching with the E-shaped sealing ring is provided on the thick-diameter pipe between the first flange plate and the port of the thick-diameter pipe.

[0008] According to the high-pressure resistant reducing pipe of the present utility model, the first flange plate is provided with a third external thread; the third external thread is matched with a second internal thread.

[0009] According to the high-pressure resistant reducing pipe of the present utility model, the first sealing ring is provided with a through hole for matching with the through hole on the first flange plate.

[0010] According to the high-pressure resistant reducing pipe of the present utility model, the outer diameter of the first sealing ring is smaller than the diameter of the first flange plate.

[0011] According to the high-pressure resistant reducing pipe of the present utility model, the inner diameter of the first sealing ring is larger than the maximum diameter of the groove.

[0012] According to the high-pressure resistant reducing pipe of the present utility model, the inner surface of the sleeve is matched with the outer surface of the reducing pipe.

[0013] The present utility model provides a high-pressure resistant reducing pipe, which includes a thick-diameter pipe. One end of the thick-diameter pipe is provided with a first flange plate with a plurality of through holes. The setting of the first flange plate can facilitate the butt joint of the thick-diameter pipe and the reducing pipe, and the setting of the through holes facilitates the locking bolts to pass through the through holes and then lock and fix the first flange plate and the second flange plate; the first flange plate is provided with a matching second flange plate. The cooperation of the first flange plate and the second flange plate can avoid the problem of mismatch during installation, resulting in inability to install; the second flange plate is sleeved on the thick-caliber end of the reducing pipe, and the thick-caliber end of the reducing pipe is matched with the thick-diameter pipe. The second flange plate is located at the thick-caliber end of the reducing pipe, which is convenient for sealing; the second flange plate is provided with threaded holes equal in number to the through holes on the first flange plate. The setting of the threaded holes can avoid adding external nuts and facilitate the disassembly of the locking bolts; the first flange plate and the second flange plate are connected by locking bolts matched with the threaded holes. The cooperation of the locking bolts and the threaded holes is convenient for installation and disassembly; a first sealing ring is arranged between the first flange plate and the second flange plate. The setting of the first sealing ring can seal the installed first flange plate and the second flange plate, and avoid the leakage of the liquid in the pipe due to the gap between the first flange plate and the second flange plate; the thin-caliber end of the reducing pipe is provided with a first external thread, and the second flange plate is provided with a second external thread. The first external thread is matched with the first internal thread of the sleeve, and the second internal thread of the sleeve is matched with the second external thread. The sleeve is sleeved outside the reducing pipe and is threadedly connected with the reducing pipe, which is convenient for the disassembly of the sleeve. The threaded connection between the sleeve and the reducing pipe has a certain sealing effect, which can avoid the large amount of liquid spraying and waste in the pipe after the reducing pipe bursts. Description of the Drawings

[0014] Figure 1 is a structural schematic diagram of the present utility model;

[0015] Figure 2 is Figure 1 a sectional schematic diagram of;

[0016] Figure 3 is Figure 2 a structural schematic diagram of part A of;

[0017] Figure 4 is Figure 3 a structural schematic diagram of part B of;

[0018] In the figure: 1 - thick-diameter pipe, 2 - locking bolt, 3 - first flange, 4 - sleeve, 5 - reducing pipe, 6 - first external thread, 7 - first internal thread, 8 - second internal thread, 9 - second external thread, 10 - second flange, 11 - E-shaped sealing ring, 12 - first sealing ring, 13 - third external thread. Specific embodiments

[0019] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0020] Refer to Figure 1 and Figure 2, the present utility model provides a high-pressure resistant reducing pipe. The high-pressure resistant reducing pipe includes a thick-diameter pipe 1. One end of the thick-diameter pipe 1 is hermetically welded with a first flange 3 having eight countersunk through holes. A second flange 10 is provided to cooperate with the first flange 3. The outer diameter of the second flange 10 is equal to the outer diameter of the first flange 3. The second flange 10 is sleeved on the thick-caliber end of the reducing pipe 5. The second flange 10 is hermetically welded with the thick-caliber end of the reducing pipe 5. The second flange 10 is provided with threaded holes having the same positions and numbers as the through holes on the first flange 3. The first flange 3 and the second flange 10 are connected by locking bolts 2 that cooperate with the threaded holes. The locking bolts 2 pass through the countersunk through holes on the first flange 3 and are tightened into the threaded holes of the second flange 10 to lock and connect the first flange 3 and the second flange 10. A first sealing ring 12 is provided between the first flange 3 and the second flange 10. The first sealing ring 12 is responsible for sealing the gap between the first flange 3 and the second flange 10 to prevent the liquid in the pipe from leaking due to the gap between the first flange 3 and the second flange 10. A first external thread 6 is provided at the thin-caliber end of the reducing pipe 5. The position where the diameter size of the thin-caliber end of the reducing pipe 5 where the first external thread 6 is located does not change. A second external thread 9 of the same model as the first external thread 6 is provided on the outer wall of the outer ring of the second flange 10. The first external thread 6 cooperates with the first internal thread 7 of the sleeve 4, and the second internal thread 8 of the sleeve 4 cooperates with the second external thread 9. By twisting the sleeve 4, the inner wall of the sleeve 4 is fitted with the outer wall of the reducing pipe 5, so that the sleeve 4 forms a support for the reducing pipe 5 and enhances the strength of the reducing pipe 5 to withstand external forces.

[0021] See Figure 2 , Figure 3 , Figure 4 , preferably, the side of the second flange 10 of the present utility model close to the first flange 3 is provided with a groove. The groove is annular. An E-shaped sealing ring 11 is provided to cooperate with the groove. The E-shaped sealing ring 11 cooperates with the thick-diameter pipe 1. There is a margin for cooperating with the E-shaped sealing ring 11 between the port of the first flange 3 and the thick-diameter pipe 1. The length of the margin of the thick-diameter pipe 1 is equal to the distance from the side of the first flange 3 close to the second flange 10 to the bottom surface of the groove after locking minus the thickness of the E-shaped sealing ring 11 after extrusion deformation. The cooperation between the E-shaped sealing ring 11 and the thick-diameter pipe 1 forms a sealing structure for the pipe connection. The double sealing effects of the E-shaped sealing ring 11 and the first sealing ring 12 can reduce the probability of sealing failure and prevent leakage. The first flange 3 is provided with a third external thread 13. The third external thread 13 cooperates with the second internal thread 8. The third external thread 13 enables the sleeve 4 to be threadedly connected with the first flange 3 after being tightened on the second flange 10, further connecting the two flanges to prevent a large amount of liquid in the pipe from leaking directly when the locking bolts 2 fail and the first flange 3 and the second flange 10 are separated.

[0022] SeeFigure 2 , Figure 3 , Figure 4 , Further, the first sealing ring 12 of the present utility model is provided with eight through holes that cooperate with the through holes on the first flange 3. The large-area first sealing ring 12 can better seal the gap between the first flange 3 and the second flange 10. The outer diameter of the first sealing ring 12 is smaller than the diameter of the first flange 3 to prevent the presence of the first sealing ring 12 from affecting the threaded connection between the first flange 3 and the casing 4. The inner diameter of the first sealing ring 12 is larger than the maximum diameter of the groove to prevent the first sealing ring 12 from affecting the sealing effect of the E-shaped sealing ring 11.

[0023] In summary, the present utility model provides a high-pressure-resistant reduced-diameter pipeline, including a thick-diameter pipe. One end of the thick-diameter pipe is provided with a first flange with a number of through holes. The setting of the first flange facilitates the butt joint between the thick-diameter pipe and the reduced-diameter pipe, and the through holes facilitate the locking bolts to pass through the through holes and then lock and fix the first flange and the second flange; the first flange is provided with a matching second flange. The cooperation between the first flange and the second flange can avoid the problem of non-matching during installation, resulting in impossible installation; the second flange is sleeved on the thick-caliber end of the reduced-diameter pipe. The thick-caliber end of the reduced-diameter pipe cooperates with the thick-diameter pipe, and the second flange is located at the thick-caliber end of the reduced-diameter pipe, facilitating sealing; the second flange is provided with threaded holes equal in number to the through holes on the first flange. The setting of the threaded holes can avoid adding external nuts and facilitate the disassembly of the locking bolts; the first flange and the second flange are connected by locking bolts that cooperate with the threaded holes. The cooperation between the locking bolts and the threaded holes facilitates installation and disassembly; a first sealing ring is arranged between the first flange and the second flange. The setting of the first sealing ring can seal the installed first flange and the second flange, preventing liquid leakage in the pipeline due to the gap between the first flange and the second flange; the thin-caliber end of the reduced-diameter pipe is provided with a first external thread, and the second flange is provided with a second external thread. The first external thread cooperates with the first internal thread of the casing, and the second internal thread of the casing cooperates with the second external thread. The casing is sleeved outside the reduced-diameter pipe and is threadedly connected to the reduced-diameter pipe, facilitating the disassembly of the casing. The threaded connection between the casing and the reduced-diameter pipe has a certain sealing effect, which can prevent a large amount of liquid in the pipeline from being sprayed and wasted after the reduced-diameter pipe bursts.

[0024] Certainly, the present utility model can also have many other embodiments. Without departing from the spirit and essence of the present utility model, those skilled in the art can make various corresponding changes and deformations according to the present utility model. However, these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present utility model.

Claims

1. A high-pressure resistant reducing pipe, characterized in that: It comprises a large-diameter tube, one end of which is provided with a first flange with a plurality of through holes; the first flange is provided with a matching second flange; the second flange is sleeved on the large-diameter end of the reducer; the second flange is provided with threaded holes having the same number as the through holes on the first flange; the first flange and the second flange are connected by locking bolts matching with the threaded holes; a first sealing ring is provided between the first flange and the second flange; the small-diameter end of the reducer is provided with a first external thread; the second flange is provided with a second external thread; the first external thread matches with the first internal thread of the sleeve; the second internal thread of the sleeve matches with the second external thread.

2. The high-pressure reducing pipe according to claim 1, characterized in that: The side of the second flange close to the first flange is provided with a groove; the groove is provided with a matching E-type sealing ring; the E-type sealing ring cooperates with the thick-diameter pipe; the thick-diameter pipe between the first flange and the thick-diameter pipe port is provided with a margin that cooperates with the E-type sealing ring.

3. The high-pressure reducing pipe according to claim 1 or 2, characterized in that: The first flange is provided with a third external thread; the third external thread cooperates with the second internal thread.

4. The high-pressure reducing pipe according to claim 1, characterized in that: The first sealing ring is provided with a through hole which matches with the through hole on the first flange.

5. The high-pressure reducing pipe according to claim 3, characterized in that: The outer ring diameter of the first sealing ring is smaller than the diameter of the first flange.

6. The high-pressure reducing pipe according to claim 2, characterized in that: The inner ring diameter of the first sealing ring is larger than the maximum diameter of the groove.

7. The high-pressure reducing pipe according to claim 1 or 2, characterized in that: The inner surface of the sleeve matches the outer surface of the reducer.

Images