CN221762910U - Pipeline sealing connection device - Google Patents

Abstract

The utility model discloses a pipeline sealing connection device, including an upper tube flange and a lower tube flange arranged below the upper tube flange, wherein opposite ends of the upper tube flange and the lower tube flange are respectively installed with a lower guide tube and an upper guide tube, wherein the lower guide tube and the upper guide tube are threadedly matched, an external covering column is installed at the top of the upper tube flange on one side of the lower guide tube, and an inner rubber column having the same inner diameter as the upper guide tube is fixed at the center position of the bottom end of the upper tube flange. The utility model effectively solves the aging and hardening problems that may occur in a single-layer sealing structure through a layered design, improves the reliability of the sealing performance, and the synergistic effect of different sealing layers enhances the resistance of the entire connection device to high pressure, and each sealing layer can share a part of the pressure, reducing the pressure burden borne by a single sealing structure.

Description

Pipeline sealing connection device

Technical Field

The utility model relates to the technical field of pipeline connection, in particular to a pipeline sealing connection device.

Background Art

The pipeline sealing connection structure is a key component composed of flanges, gaskets, bolts and nuts. Its function is to ensure the sealing and stability of the pipeline connection. The gasket fills the gap between the flanges to form an effective sealing barrier to prevent fluid leakage. The tightening force of the bolts and nuts ensures the stability of the connection, resists the pressure of the fluid inside the pipeline, and prevents the flange from loosening or deforming. Its working principle is based on the extrusion of the gasket to form a seal, the fastening of the bolts to maintain stability, and the adaptability of the connection structure, which can adapt to the changes in different pipeline specifications and working environments. However, the current pipeline sealing connection device generally forms a single-layer sealing structure mainly composed of threads and sealing rings at the connection point of the two pipelines. It has a relatively weak effect on preventing the leakage of liquids or gases under high pressure, high temperature and other conditions, and the single-layer sealing structure is relatively simple and easily affected by the external environment and fails. In the case of extreme temperature changes, chemical corrosion, etc., the elasticity and corrosion resistance of the sealing ring may be damaged, thereby affecting its sealing effect.

Utility Model Content

The utility model aims to provide a pipeline sealing connection device, so that four sealing structure layers are provided between two pipeline ends, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pipeline sealing connection device, comprising an upper tube flange and a lower tube flange arranged below the upper tube flange, the upper tube flange and the lower tube flange are respectively installed with a lower guide tube and an upper guide tube at opposite ends, the lower guide tube and the upper guide tube are threadedly matched, an external covering column is installed at the top end of the upper tube flange on one side of the lower guide tube, an inner rubber column with the same inner diameter as the upper guide tube is fixed at the center position of the bottom end of the upper tube flange, a second sealing layer is arranged at the opposite end of the inner rubber column and the lower guide tube, a middle guide tube is fixed at one end inside the lower guide tube, the top end of the middle guide tube extends to the inside of the inner rubber column, and the bottom end of the upper guide tube is provided with a fourth sealing layer extending to the inside of the lower guide tube.

Preferably, an annular flange is integrally formed on one end of the surface of the lower guide tube, and a rubber ring having the same outer diameter as that of the lower guide tube is fixed to the bottom end of the annular flange.

Preferably, a regular hexagonal nut is integrally formed on one end of the surface of the upper guide pipe.

Preferably, the outer circumferential surface of the lower guide pipe is provided with an external thread groove, and the outer circumferential surface of the upper guide pipe is provided with an internal thread groove.

Preferably, the second sealing layer is a plurality of annular grooves arranged on the inner rubber column and the opposite ends of the lower guide tube, and a sealing ring embedded in the annular groove.

Preferably, a flared portion is provided at one end of the central flow guide pipe away from the upper flow guide pipe, and chamfered portions are provided on inner edges of both ends of the central flow guide pipe.

Preferably, an iron ring is fixed to one end of the lower flow guide pipe, and the inner wall of the iron ring is fixedly connected to the outer wall of the middle flow guide pipe.

Preferably, the four sealing layers are a hollow annular sleeve fixed at the bottom end of the upper guide tube, and an annular lower groove arranged at the top end of the lower guide tube, the bottom end of the hollow annular sleeve is in contact with the bottom of the annular lower groove, and a sealing ring 2 is embedded on the inner wall of one side of the annular lower groove, and the outer diameter of the hollow annular sleeve is equal to the inner diameter of the external covering column.

Compared with the prior art, the beneficial effect of the utility model is that the pipeline sealing connection device forms a four-layer sealing structure layer. The layered design effectively solves the aging and hardening problems that may occur in the single-layer sealing structure, improves the reliability of the sealing performance, and the synergistic effect of different sealing layers enhances the resistance of the entire connection device to high pressure. Each sealing layer can share part of the pressure, reducing the pressure burden borne by the single sealing structure, thereby improving the stability of the overall system.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a three-dimensional structure of the present utility model;

FIG2 is a second schematic diagram of the three-dimensional structure of the utility model;

FIG3 is a schematic diagram of a cross-sectional three-dimensional structure of the utility model;

FIG4 is a schematic diagram of the front cross-sectional structure of the present invention;

In the figure: 1. upper tube flange; 2. lower tube flange; 3. lower guide tube; 301. annular flange; 302. rubber ring; 303. external thread groove; 4. external covering column; 5. upper guide tube; 501. internal thread groove; 502. regular hexagonal nut; 6. internal rubber column; 7. iron ring; 8. center guide tube; 801. flared part; 802. chamfered part; 9. annular groove; 10. sealing ring one; 11. fourth sealing layer; 1101. annular lower groove; 1102. hollow ring sleeve; 1103. sealing ring two.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Please refer to Figures 1-4. An embodiment of the utility model is: a pipeline sealing connection device, including an upper pipe flange 1 and a lower pipe flange 2 arranged below the upper pipe flange 1, the upper pipe flange 1 and the lower pipe flange 2 are respectively installed with a lower guide pipe 3 and an upper guide pipe 5 at opposite ends, the lower guide pipe 3 and the upper guide pipe 5 are threadedly matched, an external covering column 4 is installed at the top of the upper pipe flange 1 on one side of the lower guide pipe 3, and an inner rubber column 6 with the same inner diameter as the upper guide pipe 5 is fixed at the center position of the bottom end of the upper pipe flange 1;

The inner rubber column 6 and the end opposite to the lower guide tube 3 are provided with a second sealing layer, and a central guide tube 8 is fixed to one end inside the lower guide tube 3. The top of the central guide tube 8 extends to the inside of the inner rubber column 6. The central guide tube 8 and the inner rubber column 6 form a first sealing layer, which is the first line of defense for contacting the medium and can quickly adapt to the pressure changes inside and outside the pipeline to prevent leakage.

An iron ring 7 is fixed to one end of the lower guide pipe 3, and the inner wall of the iron ring 7 is fixedly connected to the outer wall of the middle guide pipe 8. The threads between the upper guide pipe 5 and the lower guide pipe 3 form a third sealing layer. The bottom end of the upper guide pipe 5 is provided with a fourth sealing layer 11 extending to the inside of the lower guide pipe 3.

The outer circumference of the lower guide pipe 3 is provided with an external thread groove 303, and the outer circumference of the upper guide pipe 5 is provided with an internal thread groove 501;

The second sealing layer is a plurality of annular grooves 9 arranged on the opposite ends of the inner rubber column 6 and the lower guide tube 3, and a sealing ring 10 embedded in the annular groove 9. After the lower guide tube 3 and the upper guide tube 5 are threadedly matched to the limit position through the external thread groove 303 and the internal thread groove 501, the bottom end of the inner rubber column 6 and the top end of the iron ring 7 firmly clamp the sealing ring 10 through the annular groove 9, so that the sealing ring 10 has stress under the compression of the inner rubber column 6 and the iron ring 7, and reduces the gap between the inner rubber column 6 and the iron ring 7, effectively preventing leakage problems caused by excessive medium pressure, high temperature, etc.;

An end of the central flow guide pipe 8 away from the upper flow guide pipe 5 is provided with a flared portion 801, and chamfered portions 802 are provided on the inner edges of both ends of the pipe openings of the central flow guide pipe 8. One end of the central flow guide pipe 8 away from the upper flow guide pipe 5 is provided as the flared portion 801, so that the caliber of the central flow guide pipe 8 is larger, which helps the medium to flow faster, and the chamfered portions 802 are provided on the inner edges of the two pipe openings of the central flow guide pipe 8, which serves the purpose of reducing the flow resistance of the medium.

The fourth sealing layer is a hollow ring sleeve 1102 fixed at the bottom end of the upper guide tube 5, and an annular lower groove 1101 arranged at the top end of the lower guide tube 3. The bottom end of the hollow ring sleeve 1102 is in contact with the bottom of the annular lower groove 1101. A sealing ring 1103 is inlaid on the inner wall of one side of the annular lower groove 1101. The outer diameter of the hollow ring sleeve 1102 is equal to the inner diameter of the external covering column 4. When the upper guide tube 5 and the lower guide tube 3 are screwed to the limit position, the hollow ring sleeve 1102 is completely immersed in the annular lower groove 1101. At this time, the sealing ring 1103 serves as a seal between the hollow ring sleeve 1102 and the outer wall of the lower guide tube 3, further preventing the medium from leaking out, and ensuring the sealing and anti-seepage performance of the pipeline connection structure;

An annular flange 301 is integrally formed at one end of the surface of the lower guide pipe 3, and a rubber ring 302 with the same outer diameter as the lower guide pipe 3 is fixed to the bottom end of the annular flange 301. A regular hexagonal nut 502 is integrally formed at one end of the surface of the upper guide pipe 5. The setting of the regular hexagonal nut 502 allows the user to screw the upper guide pipe 5 with an auxiliary workpiece such as a wrench, so that the upper guide pipe 5 and the lower guide pipe 3 are quickly separated, which is convenient for the staff to inspect and maintain the device.

When the embodiment of the present application is in use, first, the pipes to be used are installed on the outer walls of the upper pipe flange 1 and the lower pipe flange 2 that are away from each other, and then the staff installs and continuously screws the lower guide pipe 3 and the upper guide pipe 5, so that the lower guide pipe 3 and the upper guide pipe 5 can be threadedly assembled. At this time, the fourth sealing layer 11 enters the top of the lower guide pipe 3, and the middle guide pipe 8 enters the inner rubber column 6. In this process, the middle guide pipe 8 and the inner rubber column 6 are used to form a first sealing layer, which is the first line of defense for contacting the medium and can quickly adapt to the pressure changes inside and outside the pipeline to prevent leakage, that is, the liquid, gas and other media in the pipeline enter the inner rubber column 6 through the lower guide pipe 3 and the middle guide pipe 8, and flow into the next pipeline from the inner rubber column 6. In this process, the middle guide pipe 8 serves the purpose of dislocating the contact surface of the pipeline, and the inner rubber column 6 and the iron ring A second sealing layer is formed at the end of 7, and a secondary seal is formed by the second sealing layer. The second sealing layer serves as a backup seal, which further improves the airtightness of the pipeline system. The threads of the upper guide tube 5 and the lower guide tube 3 cooperate to form a third sealing layer, and finally the outermost sealing layer of the device is formed by the external covering column 4 and the fourth sealing layer 11. The third and fourth sealing layers play an important role in extreme situations to ensure that the sealing effect is durable and stable. This hierarchical design effectively solves the aging and hardening problems that may occur in a single-layer sealing structure, improves the reliability of the sealing performance, and the synergistic effect of different sealing layers enhances the resistance of the entire connection device to high pressure. Each sealing layer can share part of the pressure, reducing the pressure burden borne by a single sealing structure, thereby improving the stability of the overall system.

It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims (8)

1. A pipeline sealing connection device, characterized in that: including last tub of flange (1) and go up tub of flange (1) below lower tub of flange (2) that set up, go up tub of flange (1), lower tub of flange (2) relative one end is installed respectively and is gone up honeycomb duct (3) and go up honeycomb duct (5), lower honeycomb duct (3), go up honeycomb duct (5) screw-thread fit, external cladding post (4) are installed on the last tub of flange (1) top of honeycomb duct (3) one side down, the central point department of going up tub of flange (1) bottom is fixed with and goes up interior rubber column (6) the same with last honeycomb duct (5) internal diameter, interior rubber column (6), lower honeycomb duct (3) relative one end are provided with the second sealing layer, the inside one end of lower honeycomb duct (3) is fixed with put honeycomb duct (8), and the top of putting honeycomb duct (8) extends to the inside of interior rubber column (6), the bottom of going up honeycomb duct (5) is provided with and extends to fourth sealing layer (11) of honeycomb duct (3) inside down.

2. A pipe sealing connection as defined in claim 1 wherein: one end of the surface of the lower flow guide pipe (3) is integrally formed with an annular flange (301), and a rubber ring (302) with the same outer diameter as the outer diameter of the lower flow guide pipe (3) is fixed at the bottom end of the annular flange (301).

3. A pipe sealing connection as defined in claim 1 wherein: one end of the surface of the upper guide pipe (5) is integrally formed with a positive hexagonal nut (502).

4. A pipe sealing connection as defined in claim 1 wherein: the outer peripheral surface of the lower flow guide pipe (3) is provided with an external thread groove (303), and the outer peripheral surface of the upper flow guide pipe (5) is provided with an internal thread groove (501).

5. A pipe sealing connection as defined in claim 1 wherein: the second sealing layer is a plurality of annular grooves (9) arranged on the opposite ends of the inner rubber column (6) and the lower flow guide pipe (3), and a first sealing ring (10) embedded in the annular grooves (9).

6. A pipe sealing connection as defined in claim 1 wherein: the one end of putting honeycomb duct (8) and keeping away from last honeycomb duct (5) is provided with the flaring portion (801), put the both ends mouth of pipe of honeycomb duct (8) in and all be provided with chamfer portion (802) on the mouth of pipe inner edge.

7. A pipe sealing connection as defined in claim 1 wherein: an iron ring (7) is fixed at one end inside the lower guide pipe (3), and the inner wall of the iron ring (7) is fixedly connected with the outer wall of the middle guide pipe (8).

8. A pipe sealing connection as defined in claim 1 wherein: the four sealing layers are hollow annular sleeves (1102) fixed at the bottom end of the upper flow guide pipe (5) and annular lower grooves (1101) arranged at the top end of the lower flow guide pipe (3), the bottom ends of the hollow annular sleeves (1102) are in contact with the bottoms of the annular lower grooves (1101), sealing rings II (1103) are inlaid on the inner wall of one side of the annular lower grooves (1101), and the outer diameter of the hollow annular sleeves (1102) is equal to the inner diameter of the external cladding column (4).