Flange structure with good sealing performance for chemical pipeline

Abstract

The utility model belongs to the technical field of flanges, and particularly relates to a flange structure with good sealing performance for a chemical pipeline, which comprises a socket welding flange I, a socket welding flange II and a hollow sealing ring, the inner side of the socket welding flange I is fixedly connected with a circular ring, and one side of the circular ring is fixedly connected with a trapezoidal ring; a circular groove is formed in the inner side of the second socket welding flange, a trapezoidal ring groove is formed in the circular groove, a V-shaped gasket is arranged in the trapezoidal ring groove, and the V-shaped gasket comprises a V-shaped part and a flat ring part. Through the arrangement of the circular ring, the outer diameter and the inner diameter of the circular ring are equal to those of the circular groove, so that the circular ring enters the circular groove for plugging, chemical liquid is prevented from directly contacting the V-shaped gasket, the V-shaped part of the V-shaped gasket is located between the trapezoidal ring and the trapezoidal ring groove, and the flat ring part is located between the circular ring and the circular groove; therefore, compared with a common flat ring, the V-shaped gasket is better in sealing effect, and the trapezoid ring can guarantee the sealing performance by pressing the V-shaped gasket.

Description

Technical Field

[0001] This utility model belongs to the field of flange technology, specifically relating to a flange structure for chemical pipelines with good sealing performance. Background Technology

[0002] A flange, also called a flange plate or flange, is a component used to connect pipes together, for connecting the pipe ends. Flanges are also used on equipment inlets and outlets to connect two pieces of equipment. A flange connection, or flange joint, refers to a detachable connection consisting of a flange, gasket, and bolts connected as a sealing structure. In the transportation of chemical raw materials, pipeline connections are used for transport, and flanges are generally used to connect pipelines. With the continuous development of technology and the advancement of chemical processes, component connections are needed when transporting chemical liquids. Due to the high pressure of pipelines, flange connections are generally used.

[0003] Existing flanges are usually used in conjunction with gaskets. However, the gaskets are mostly simple in structure. Since the gaskets are in direct contact with chemical liquids, they are susceptible to corrosion by the chemical liquids over a long period of time, which can lead to leakage of chemical liquids from the flange. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides a flange structure for chemical pipelines with good sealing performance, solving the problem that gaskets are in direct contact with chemical liquids and are therefore susceptible to corrosion from chemical liquids over a long period of time.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flange structure for chemical pipelines with good sealing performance, comprising a first socket welding flange, a second socket welding flange, and a hollow sealing ring. A circular ring is fixedly connected to the inner side of the first socket welding flange, and a trapezoidal ring is fixedly connected to one side of the circular ring. A circular groove is formed on the inner side of the second socket welding flange, and a trapezoidal ring groove is formed inside the circular groove. A V-shaped washer is installed inside the trapezoidal ring groove. The V-shaped washer includes a V-shaped portion and a flat ring portion. Ring grooves are formed on the inner sides of both the first and second socket welding flanges. The hollow sealing ring includes a loading portion and a rhomboid portion. The loading portion can be embedded in the ring groove, and the interior of the rhomboid portion is hollow. Air holes are formed on the side of the hollow sealing ring.

[0006] Preferably, both the first and second socket welding flanges have through holes on their surfaces, and bolts are inserted into the through holes, with nuts threaded onto the bolts.

[0007] Preferably, a washer is fitted onto the surface of the bolt, and the number of washers corresponds to the number of bolts and nuts.

[0008] Preferably, a second washer is fitted onto the surface of the bolt, and the second washer is located between the first socket welding flange and the second socket welding flange.

[0009] Preferably, the inner and outer diameters of the ring and the groove are equal.

[0010] Preferably, the loading portions of the hollow sealing ring are symmetrically arranged.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This high-sealing flange structure for chemical pipelines features a circular ring with both its outer and inner diameters matching the circular groove. This allows the ring to seal within the groove, preventing direct contact between the chemical liquid and the V-shaped gasket. The V-shaped portion of the gasket is located between the trapezoidal ring and its groove, while the flat portion is located between the circular ring and the groove. Therefore, the V-shaped gasket offers better sealing than a standard flat gasket. The trapezoidal ring ensures a tight seal by compressing the V-shaped gasket. The hollow sealing ring facilitates insertion into the groove, and the hollow rhomboid portion undergoes longitudinal deformation under pressure. Air within the hollow portion is expelled through vents, allowing the hollow portion to close, further enhancing the sealing performance of both the socket welding flange one and the socket welding flange two. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model, used together with the embodiments of this utility model to explain this utility model, and do not constitute a limitation on this utility model. In the drawings:

[0014] Figure 1 This is a complete structural schematic diagram of the present invention;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a cross-sectional perspective view of the present invention;

[0017] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0018] Figure 5 This utility model Figure 3 Enlarged view of section B in the middle.

[0019] In the diagram: 1. Socket welding flange one; 2. Socket welding flange two; 3. Hollow sealing ring; 301. Loading part; 302. Diamond-shaped part; 303. Pore; 4. Circular ring; 5. Trapezoidal ring; 6. Circular groove; 7. Trapezoidal ring groove; 8. V-type washer; 801. V-shaped part; 802. Flat ring part; 9. Ring groove; 10. Through hole; 11. Bolt; 12. Nut; 13. Washer one; 14. Washer two. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 This utility model provides the following technical solution: a flange structure for chemical pipelines with good sealing performance, including a first socket welding flange 1, a second socket welding flange 2, and a hollow sealing ring 3. A circular ring 4 is fixedly connected to the inner side of the first socket welding flange 1, and a trapezoidal ring 5 is fixedly connected to one side of the circular ring 4. A circular groove 6 is opened on the inner side of the second socket welding flange 2, and a trapezoidal ring groove 7 is opened inside the circular groove 6. A V-shaped washer 8 is installed inside the trapezoidal ring groove 7. The V-shaped washer 8 includes a V-shaped part 801 and a flat ring part 802. A ring groove 9 is opened on the inner side of both the first socket welding flange 1 and the second socket welding flange 2. The hollow sealing ring 3 includes a loading part 301 and a diamond-shaped part 302. The loading part 301 can be embedded in the ring groove 9. The interior of the diamond-shaped part 302 is hollow. An air hole 303 is opened on the side of the hollow sealing ring 3.

[0022] In this embodiment, the outer and inner diameters of the ring 4 are equal to those of the groove 6, allowing the ring 4 to seal inside the groove 6. This helps prevent chemical liquids from directly contacting the V-shaped gasket 8. The V-shaped portion 801 of the V-shaped gasket 8 is located between the trapezoidal ring 5 and the trapezoidal groove 7, while the flat portion 802 is located between the ring 4 and the groove 6. Therefore, the V-shaped gasket 8 has a better sealing effect than a regular flat ring. The trapezoidal ring 5 can ensure sealing by pressing the V-shaped gasket 8. The hollow sealing ring 3 allows its loading portion 301 to be easily inserted into the groove 9. The hollow interior of the rhomboid portion 302 allows it to deform longitudinally under pressure. The air inside the hollow portion is discharged through the vent 303, allowing the hollow portion to close. This further improves the sealing effect of the socket welding flange 1 and the socket welding flange 2.

[0023] Specifically, both the first socket welding flange 1 and the second socket welding flange 2 have through holes 10 on their surfaces. The through holes 10 facilitate the insertion of bolts 11. Bolts 11 are inserted into the through holes 10, and nuts 12 are threaded onto the surface of bolts 11. By threading the nuts 12 onto the surface of bolts 11 and tightening them, the first socket welding flange 1 and the second socket welding flange 2 can be combined, thereby pressing the V-type gasket 8 and the hollow sealing ring 3.

[0024] Specifically, a washer 13 is fitted onto the surface of bolt 11. The number of washers 13 corresponds to the number of bolts 11 and nuts 12. The material of washer 13 is rubber. The use of washer 13 can prevent bolts 11 and nuts 12 from causing wear on the outer side of socket welding flange 1 and socket welding flange 2.

[0025] Specifically, a washer 14 is fitted onto the surface of bolt 11. The washer 14 is located between socket welding flange 1 and socket welding flange 2. The material of the washer 14 is also rubber. The washer 14 can prevent wear from forming on the opposite side of socket welding flange 1 and socket welding flange 2.

[0026] Specifically, the inner and outer diameters of the ring 4 and the groove 6 are equal. The ring 4 can be inserted into the groove 6 to achieve a sealing effect, which can prevent the V-shaped gasket 8 from directly contacting the chemical liquid.

[0027] Specifically, the loading part 301 of the hollow sealing ring 3 is symmetrically arranged, so that the hollow sealing ring 3 can be kept stable when it is loaded into the symmetrical ring groove 9 through the loading part 301.

[0028] The working principle or usage process of this utility model is as follows: First, the socket welding flange 1 and socket welding flange 2 are connected to the chemical pipeline. Then, the V-shaped washer 8 is placed into the trapezoidal ring groove 7, and the hollow sealing ring 3 is placed into the ring groove 9 on either side. Next, the left washer 13 is placed on the bolt 11, and the bolt 11 is first passed through the socket welding flange 1. Then, the second washer 14 and the right washer 13 are placed on top, and the nut 12 is tightened. By tightening the nut 12, the socket welding flange 1 and the socket welding flange 2 are connected, allowing the ring 4 to enter the circular groove 6. Since the outer and inner diameters of the ring 4 are equal to those of the circular groove 6, the ring 4 enters the interior of the circular groove 6. It can be used for sealing, which helps to prevent chemical liquids from directly contacting the V-type gasket 8. The V-shaped part 801 of the V-type gasket 8 is located between the trapezoidal ring 5 and the trapezoidal groove 7, and the flat ring part 802 is located between the circular ring 4 and the circular groove 6. The trapezoidal ring 5 can ensure the sealing performance by pressing the V-type gasket 8. The interior of the diamond-shaped part 302 of the hollow sealing ring 3 is hollow, so the diamond-shaped part 302 can be deformed longitudinally when squeezed. The air in the hollow part is discharged through the air hole 303, so the hollow part can be closed, which helps to further improve the sealing effect of the socket welding flange 1 and the socket welding flange 2. The electrical equipment in this device is all connected to an external power supply and is controlled by a matching control switch to operate and shut down.

[0029] Finally, it should be noted that the above descriptions are merely preferred embodiments of this utility model and are not intended to limit the utility model. The selection and detailed description of these embodiments in this specification are for the purpose of better explaining the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flange structure for chemical pipelines with good sealing performance, comprising a first socket welding flange (1), a second socket welding flange (2), and a hollow sealing ring (3), characterized in that: A ring (4) is fixedly connected to the inner side of the first socket welding flange (1), and a trapezoidal ring (5) is fixedly connected to one side of the ring (4). A circular groove (6) is opened on the inner side of the second socket welding flange (2). A trapezoidal ring groove (7) is opened inside the circular groove (6). A V-shaped washer (8) is installed inside the trapezoidal ring groove (7). The V-shaped washer (8) includes a V-shaped part (801) and a flat ring part (802). A ring groove (9) is opened on the inner side of both the first socket welding flange (1) and the second socket welding flange (2). The hollow sealing ring (3) includes a loading part (301) and a diamond-shaped part (302). The loading part (301) can be embedded in the ring groove (9). The interior of the diamond-shaped part (302) is hollow. An air hole (303) is opened on the side of the hollow sealing ring (3).

2. The flange structure for chemical pipelines with good sealing performance according to claim 1, characterized in that: Both the first socket welding flange (1) and the second socket welding flange (2) have through holes (10) on their surfaces. Bolts (11) are inserted into the through holes (10), and nuts (12) are threaded onto the surface of the bolts (11).

3. The flange structure for chemical pipelines with good sealing performance according to claim 2, characterized in that: The surface of the bolt (11) is fitted with a washer (13), and the number of washers (13) corresponds to the number of bolts (11) and nuts (12).

4. The flange structure for chemical pipelines with good sealing performance according to claim 2, characterized in that: A washer (14) is fitted onto the surface of the bolt (11), and the washer (14) is located between the socket welding flange (1) and the socket welding flange (2).

5. The flange structure for chemical pipelines with good sealing performance according to claim 1, characterized in that: The inner and outer diameters of the ring (4) and the groove (6) are equal.

6. The flange structure for chemical pipelines with good sealing performance according to claim 1, characterized in that: The loading part (301) of the hollow sealing ring (3) is symmetrically arranged.

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