Multi-sealing flange

Abstract

The utility model discloses a multi-sealing flange which comprises a first flange, the lower end of the first flange is movably connected with a second flange, a first protective shell is movably connected in the first flange, a second protective shell is movably connected in the second flange, a first positioning hole is formed in the first flange, and a second positioning hole is formed in the second flange. A first positioning strip is fixedly connected to the side face of the first protective shell, a second positioning hole is formed in the second flange, a second positioning strip is fixedly connected to the side face of the second protective shell, a plurality of first threaded holes are formed in the first flange, and a plurality of second threaded holes are formed in the second flange. The lower end of the bolt is sleeved with a movably-connected nut, triangular grooves are formed in the bolt and the nut, and triangular rods are movably connected into the triangular grooves. Through the structure, a medium is effectively prevented from leaking from a flange connecting surface and a bolt connecting part, the leakage risk is reduced, quick mounting is facilitated, the flange connecting stability is improved, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to flange technical field especially relates to a multiple sealing flange. BACKGROUND

[0002] In industrial pipeline system, as the key component of connecting pipeline, equipment, the sealing performance of flange directly influences system operation safety and efficiency. The traditional flange adopts single sealing gasket mostly, and under the complex working conditions such as high temperature, high pressure, strong corrosion, the sealing gasket is easy to appear aging, deformation, leads to medium leakage, not only causes material waste, but also can cause fire, explosion and other safety accidents.

[0003] Part of improved flange increases sealing structure, but there is complex structure, installation and maintenance difficulty, sealing element replacement cost higher problem. For example, the flange sealing structure disclosed by CN222702795U improves the sealing effect by adding multiple sealing layers, but the assembly precision between the sealing layers in the structure is extremely high, the installation process is tedious, and after long-term operation, the multiple sealing structures are easy to be damaged locally due to uneven stress. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a multiple sealing flange, which effectively blocks the leakage of medium from the flange connecting surface and bolt connection, reduces the risk of leakage, facilitates quick installation, improves the stability of flange connection, and reduces maintenance cost.

[0005] In order to achieve the above purpose, a multiple sealing flange is provided, which comprises a first flange, a second flange movably connected to the lower end of the first flange, a first protective shell movably connected in the first flange, and a second protective shell movably connected in the second flange.

[0006] According to the multiple sealing flange, a first positioning hole is formed in the first flange, a first positioning strip is fixedly connected to the side surface of the first protective shell, the first positioning hole is movably connected to the first positioning strip, and a plurality of first mounting holes are formed in the first protective shell.

[0007] According to the multiple sealing flange, a second positioning hole is formed in the second flange, a second positioning strip is fixedly connected to the side surface of the second protective shell, the second positioning strip is movably connected to the second positioning hole, and a plurality of second mounting holes are formed in the second protective shell.

[0008] According to the multiple sealing flange, a plurality of first threaded holes are formed in the first flange, a plurality of second threaded holes are formed in the second flange, and bolts are movably connected in the first threaded holes, the second threaded holes, the first mounting holes, and the second mounting holes.

[0009] According to the multi-sealing flange, the upper end of the bolt is provided with a cross groove in correspondence, the upper end of the bolt is sleeved with a third sealing ring which is movably connected, the lower end of the third sealing ring is movably connected to the first flange, and the lower end of the bolt is sleeved with a nut which is movably connected.

[0010] According to the multi-sealing flange, the lower end of the bolt is sleeved with a fourth sealing ring which is movably connected, one end of the fourth sealing ring is movably connected to the nut, and the other end of the fourth sealing ring is connected to the second flange.

[0011] According to the multi-sealing flange, the bolt and the nut are provided with a triangular groove, and the triangular groove is movably connected with a triangular rod.

[0012] According to the multi-sealing flange, the first flange and the second flange are provided with a mounting groove, the mounting groove is movably connected with a first sealing ring, and the mounting groove is movably connected with a second sealing ring.

[0013] Beneficial effects:

[0014] 1. The first flange and the second flange are provided with the first sealing ring and the second sealing ring in the mounting groove, the third sealing ring and the fourth sealing ring are arranged at the bolt, a plurality of sealing lines are formed, medium leakage from the flange connecting surface and the bolt connecting position is effectively blocked, the sealing reliability can be ensured under high temperature, high pressure and strong corrosion conditions, and the leakage risk is reduced.

[0015] 2. The first protective shell and the second protective shell are positioned by cooperating with the flange positioning hole through the positioning strip, so that the installation is convenient and fast; the triangular groove of the bolt and the nut cooperates with the triangular rod, so that loosening is prevented; the bolt is uniformly stressed through the multiple hole positions, the installation process is simplified, the flange connection stability is improved, and the maintenance cost is reduced.

[0016] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings and embodiments;

[0018] Figure 1 A perspective view of a multi-sealing flange is provided for the present application;

[0019] Figure 2 A top view of a multi-sealing flange is provided for the present application;

[0020] Figure 3 A fixing device structure diagram of a multi-sealing flange is provided for the present application;

[0021] Figure 4A cross section view of a multiple sealing flange is provided in the utility model.

[0022] Figure 5 A cross section view of a multiple sealing flange is provided in the utility model. Figure 4 An enlarged view of A in the middle.

[0023] Legend:

[0024] 1, first flange;2, second flange;3, first sealing ring;4, first protective shell;5, bolt;6, cross groove;7, second sealing ring;8, second protective shell;9, triangular rod;10, nut;11, third sealing ring;12, fourth sealing ring;13, triangular groove;14, mounting groove;15, first threaded hole;16, second threaded hole;17, first mounting hole;18, second mounting hole;19, first positioning strip;20, first positioning hole;21, second positioning strip;22, second positioning hole. Specific implementation

[0025] This part will describe the specific embodiments of the utility model in detail, and the preferred embodiments of the utility model are shown in the drawings, and the drawings are used to supplement the description of the text part, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0026] Referring to Figures 1-5 , the utility model embodiment a multiple sealing flange, it includes first flange 1, the lower end of first flange 1 is movably connected with second flange 2, first protective shell 4 is movably connected in first flange 1, second protective shell 8 is movably connected in second flange 2, and the initial sealing barrier is formed.

[0027] Specifically: first flange 1 is provided with first positioning hole 20, and the side surface of first protective shell 4 is fixedly connected with first positioning strip 19, and first positioning hole 20 is movably connected to first positioning strip 19, and first protective shell 4 is provided with a plurality of first mounting holes 17.

[0028] Specifically: second flange 2 is provided with second positioning hole 22, and the side surface of second protective shell 8 is fixedly connected with second positioning strip 21, and second positioning strip 21 is movably connected to second positioning hole 22, and second protective shell 8 is provided with a plurality of second mounting holes 18, to ensure that bolt 5 is formed after penetrating and is stably connected.

[0029] Specifically: first flange 1 is provided with a plurality of first threaded holes 15, and second flange 2 is provided with a plurality of second threaded holes 16, and bolt 5 is movably connected in first threaded hole 15, second threaded hole 16, first mounting hole 17 and second mounting hole 18, to realize the double sealing of bolt 5 connection.

[0030] Specifically, the upper end of the bolt 5 is provided with a cross groove 6, the upper end of the bolt 5 is sleeved with a third sealing ring 11 connected movably, the lower end of the third sealing ring 11 is connected movably to the first flange 1, the lower end of the bolt 5 is sleeved with a nut 10 connected movably, and double sealing of the bolt 5 connection is realized.

[0031] Specifically, the lower end of the bolt 5 is sleeved with a fourth sealing ring 12 connected movably, one end of the fourth sealing ring 12 is connected movably to the nut 10, and the other end of the fourth sealing ring 12 is connected to the second flange 2.

[0032] Specifically, the bolt 5 and the nut 10 are provided with a triangular groove 13, and a triangular rod 9 is movably connected in the triangular groove 13, which is convenient and efficient to maintain.

[0033] Specifically, the first flange 1 and the second flange 2 are provided with a mounting groove 14, the mounting groove 14 is movably connected with a first sealing ring 3, and the mounting groove 14 is movably connected with a second sealing ring 7.

[0034] Working principle:

[0035] The first flange 1 and the second flange 2 are connected by the bolt 5. First, the first positioning strip 19 on the side of the first protective shell 4 is aligned with the first positioning hole 20 of the first flange 1, and the initial positioning is completed by inserting. Similarly, the second protective shell 8 is positioned by the second positioning strip 21 and the second positioning hole 22 of the second flange 2. Then, the bolt 5 is sequentially inserted through the first mounting hole 17 of the first protective shell 4, the first threaded hole 15 of the first flange 1, the second threaded hole 16 of the second flange 2, and the second mounting hole 18 of the second protective shell 8, and then the nut 10 is tightened, so that the first flange 1 and the second flange 2 are tightly attached. In terms of sealing, the first flange 1 and the second flange 2 are respectively embedded with the first sealing ring 3 and the second sealing ring 7 in the mounting groove 14, and the two sealing rings are deformed by being pressed when the flanges are connected, filling the gap between the flange contact surfaces, forming the first sealing line, effectively preventing the medium from leaking from the flange connection surface. For the bolt 5 connection, the third sealing ring 11 sleeved on the upper end of the bolt 5 is compressed and tightly attached to the upper surface of the first flange 1 when the nut 10 is tightened; the fourth sealing ring 12 at the lower end of the bolt 5 is tightly attached to the second flange 2 under the pressure of the nut 10, forming double sealing, preventing the medium from leaking from the bolt hole, and greatly improving the sealing performance. In order to prevent the bolt 5 from loosening during operation, the triangular groove 13 is formed on the surface of the bolt 5 and the nut 10, and the triangular rod 9 is embedded in the triangular groove 13. When the bolt 5 and the nut 10 are tightened, the triangular rod 9 is clamped into the triangular groove 13, limiting the relative rotation of the bolt 5 and the nut 10. Even under the working conditions of pipeline vibration, pressure fluctuation, etc., the connection can also be kept tight.

[0036] The utility model embodiment makes the detailed explanation in combination with the drawing, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range of ordinary skill in the art person who has possessed under the premise of not departing from the utility model tenet.

Claims

1. A multiple seal flange comprising a first flange (1), characterized in that: The lower end of the first flange (1) is movably connected with a second flange (2), the first flange (1) is movably connected with a first protective shell (4), and the second flange (2) is movably connected with a second protective shell (8).

2. A multiple seal flange according to claim 1, wherein, A first positioning hole (20) is formed in the first flange (1), a first positioning strip (19) is fixedly connected to the side of the first protective shell (4), the first positioning hole (20) is movably connected to the first positioning strip (19), and a plurality of first mounting holes (17) are formed in the first protective shell (4).

3. A multiple seal flange according to claim 2, wherein, A second positioning hole (22) is formed in the second flange (2), a second positioning strip (21) is fixedly connected to the side of the second protective shell (8), the second positioning strip (21) is movably connected to the second positioning hole (22), and a plurality of second mounting holes (18) are formed in the second protective shell (8).

4. A multiple seal flange according to claim 3, wherein, A plurality of first threaded holes (15) are formed in the first flange (1), a plurality of second threaded holes (16) are formed in the second flange (2), and the first threaded holes (15), the second threaded holes (16), the first mounting holes (17), and the second mounting holes (18) are movably connected with bolts (5).

5. A multiple seal flange according to claim 4, wherein, A cross slot (6) is formed in the upper end of the bolt (5), a third sealing ring (11) is movably connected to the upper end of the bolt (5), the lower end of the third sealing ring (11) is movably connected to the first flange (1), and the lower end of the bolt (5) is movably connected with a nut (10).

6. A multiple seal flange according to claim 5, wherein, A fourth sealing ring (12) is movably connected to the lower end of the bolt (5), one end of the fourth sealing ring (12) is movably connected to the nut (10), and the other end of the fourth sealing ring (12) is movably connected to the second flange (2).

7. A multiple seal flange according to claim 6, wherein, A triangular groove (13) is formed in the bolt (5) and the nut (10), and a triangular rod (9) is movably connected in the triangular groove (13).

8. A multiple seal flange according to claim 1 wherein, A mounting groove (14) is formed in the first flange (1) and the second flange (2), a first sealing ring (3) is movably connected in the mounting groove (14), and a second sealing ring (7) is movably connected in the mounting groove (14).

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