Leakage-proof flange sealing connection device

Abstract

The utility model discloses a leakproof flange sealing connection device, which belongs to the technical field of flange connection and comprises a left flange and a right flange, the left flange and the right flange are respectively provided with a plurality of first bolt holes, first bolts sequentially penetrate through the right flange and the left flange and are screwed through first nuts, and the first nuts are pressed on the end face of the left flange. A head nut of the first bolt is pressed on the end face of the right flange; a plurality of second screw holes are formed in the side wall of the left flange, the axes of the second screw holes are perpendicular to the axes of the first bolt holes, the second screw holes and the first bolt holes are arranged in a one-to-one correspondence mode and communicated, second screws are connected to the second screw holes in a threaded mode, and positioning holes are formed in screws of the first bolts. After the first bolt is screwed down through the first nut, the positioning hole and the second screw hole are coaxial, and the second screw penetrates through the positioning hole. According to the utility model, the sealing connection of the left flange and the right flange has double protection effects of transverse and longitudinal combination, and the connection sealing performance is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flange connection technical field, in particular to a kind of anti-leakage flange sealing connection device. BACKGROUND

[0002] Flange sealing connection is that two pipelines, pipe fittings or equipment are fixed on a flange plate respectively, then flange gasket is added between the two flange plates, and finally the two flange plates are pulled tightly by bolts to make them tightly combined. However, the long-term tightening of the bolts and nuts may cause loosening due to metal fatigue or vibration of the pipeline, thereby reducing the sealing performance of the flange connection and easily causing leakage.

[0003] Therefore, an anti-leakage flange sealing connection device is provided. SUMMARY

[0004] The utility model discloses a kind of anti-leakage flange sealing connection devices, and at least one of the above technical problems is solved or improved.

[0005] To achieve the above object, the utility model provides the following scheme: the utility model provides a kind of anti-leakage flange sealing connection device, including left flange and right flange, the left flange and the right flange are equipped with a plurality of first bolt holes, first bolt is sequentially passed through the first bolt hole on the right flange and the first bolt hole on the left flange and is tightened by first nut, the first nut is pressed on the end face of the left flange, and the head nut of the first bolt is pressed on the end face of the right flange;

[0006] A plurality of second screw holes are formed in the side wall of the left flange, the axis of the second screw hole is perpendicular to the axis of the first bolt hole, a plurality of second screw holes and a plurality of first bolt holes are one-to-one correspondingly arranged and communicated, a second screw is threadedly connected to the second screw hole, a positioning hole is formed in the screw of the first bolt, the positioning hole is coaxial with the second screw hole after the first bolt is tightened by the first nut, and the second screw passes through the positioning hole.

[0007] Preferably, the second screw is divided into three sections, i.e., a first threaded section, a smooth rod section and a second threaded section, the second screw hole is divided into three sections, i.e., a first screw hole section, a sliding hole section and a second screw hole section from outside to inside, the sliding hole section passes through both sides of the first bolt hole, the first threaded section is threadedly connected to the first screw hole section, the smooth rod section is slidingly connected to the sliding hole section and the positioning hole, and the second threaded section is threadedly connected to the second screw hole section.

[0008] Preferably, the diameters of the first threaded section, the polished rod section and the second threaded section are successively reduced.

[0009] Preferably, the first threaded section is fixedly connected with a locking nut at the end.

[0010] Preferably, the locking nut is cylindrical, a plurality of limiting grooves are formed in the side wall of the left flange, the plurality of limiting grooves are arranged in one-to-one correspondence with the plurality of first threaded holes and are in communication, and the locking nut is located in the limiting groove.

[0011] Preferably, a plurality of hexagonal recesses are formed in the end face of the right flange away from the left flange, the plurality of hexagonal recesses are arranged in one-to-one correspondence with the plurality of first bolts, the head nut of the first bolt is a hexagonal nut, and the head nut of the first bolt is located in the hexagonal recess.

[0012] Preferably, an annular groove is formed in the end face of the left flange close to the right flange, an annular boss is fixedly connected to the end face of the right flange close to the left flange, and the annular boss extends into the annular groove.

[0013] Preferably, a sealing gasket is clamped between the annular boss and the annular groove.

[0014] The utility model discloses the following technical effects: the left flange and the right flange are connected through a plurality of first bolts and locked through a first nut, at this time, the first nut is pressed on the end face of the left flange, the head nut of the first bolt is pressed on the end face of the right flange, and the positioning hole on the first bolt is coaxial with the second screw hole on the left flange, then the second screw is screwed into the second screw hole, so that the second screw is inserted into the positioning hole, through this setting, even if the first nut and the first bolt are loose due to long-time use or the influence of external environment, and since the second screw is installed on the left flange and inserted into the positioning hole of the first bolt, the head nut of the first bolt is pressed on the end face of the right flange, so that the axial positioning of the first bolt can be realized, axial displacement of the first bolt is prevented, and the connection sealing property of the left flange and the right flange is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments illustrated in the drawings are provided to explain the present application and are not intended to limit the present application. In the drawings:

[0016] Fig. 1 It is a structural schematic diagram of the utility model;

[0017] Fig. 2The utility model discloses an exploded view of the utility model discloses a cross section.

[0018] Fig. 3 The utility model discloses a cross section.

[0019] In the drawing: 1, left flange, 2, right flange, 3, first bolt hole, 4, first bolt, 5, first nut, 6, second screw, 7, positioning hole, 8, first threaded section, 9, polished rod section, 10, second threaded section, 11, first screw hole section, 12, sliding hole section, 13, second screw hole section, 14, locking nut, 15, limit groove, 16, hexagonal recess, 17, annular groove, 18, annular boss, 19, sealing washer. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0021] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0022] Reference Figs. 1-3 The utility model provides a kind of leakage-proof flange sealing connection device, comprising: left flange 1 and right flange 2, left flange 1 and right flange 2 are respectively provided with a plurality of first bolt hole 3, first bolt 4 is sequentially threaded through the first bolt hole 3 on right flange 2 and the first bolt hole 3 on left flange 1 and is tightened by first nut 5, first nut 5 is pressed on the end face of left flange 1, and the head cap of first bolt 4 is pressed on the end face of right flange 2;

[0023] A plurality of second screw holes are formed in the side wall of left flange 1, the axis of the second screw hole is perpendicular to the axis of the first bolt hole 3, a plurality of second screw holes are arranged and communicated one by one corresponding to a plurality of first bolt holes 3, a second screw 6 is threadedly connected to the second screw hole, a positioning hole 7 is formed in the screw of the first bolt 4, and after the first bolt 4 is tightened by the first nut 5, the positioning hole 7 is coaxial with the second screw hole, and the second screw 6 penetrates the positioning hole 7.

[0024] The left flange 1 and the right flange 2 are connected through a plurality of first bolts 4 and locked through first nuts 5, at this time, the first nuts 5 are pressed on the end face of the left flange 1, the head of the first bolt 4 is pressed on the end face of the right flange 2, and the positioning hole 7 on the first bolt 4 is coaxial with the second screw hole on the left flange 1, then the second screw rod 6 is screwed into the second screw hole, so that the second screw rod 6 is inserted into the positioning hole 7, through this setting, even if the first nut 5 and the first bolt 4 are loose due to long-term use or the influence of the external environment, and because the second screw rod 6 is installed on the left flange 1 and inserted into the positioning hole 7 of the first bolt 4, the head of the first bolt 4 is pressed on the end face of the right flange 2, so that the axial positioning of the first bolt 4 can be realized, the axial displacement of the first bolt 4 is prevented, and the sealing connection of the left flange 1 and the right flange 2 is ensured. Through the setting of the first bolt 4 and the second screw rod 6, the left flange 1 and the right flange 2 can be protected in horizontal and vertical combination, the sealing connection is greatly improved, and the leakage prevention performance and use reliability are improved.

[0025] In some optional embodiments, the second screw rod 6 is divided into three sections, which are a first threaded section 8, a smooth rod section 9 and a second threaded section 10 in sequence, and the second screw hole is divided into three sections, which are a first screw hole section 11, a sliding hole section 12 and a second screw hole section 13 from outside to inside, the sliding hole section 12 penetrates through both sides of the first bolt hole 3, the first threaded section 8 is threadedly connected with the first screw hole section 11, the smooth rod section 9 is slidingly connected with the sliding hole section 12 and the positioning hole 7, and the second threaded section 10 is threadedly connected with the second screw hole section 13.

[0026] The diameter of the positioning hole 7 can be slightly larger than the diameter of the sliding hole section 12, so as to facilitate the subsequent assembly of the second screw rod 6.

[0027] In some optional embodiments, the diameters of the first threaded section 8, the smooth rod section 9 and the second threaded section 10 decrease in sequence.

[0028] In some optional embodiments, the first threaded section 8 is fixedly connected with a locking nut 14 at the end.

[0029] During installation, the second threaded section 10 penetrates through the first screw hole section 11, the sliding hole section 12 and the positioning hole 7 of the first bolt 4 in sequence and is then screwed on the second screw hole section 13, so that the second threaded section 10 is screwed and the first threaded section 8 is screwed on the first screw hole section 11 at the same time, thereby improving the locking force.

[0030] In some optional embodiments, the locking nut 14 is cylindrical, a plurality of limiting grooves 15 are formed in the side wall of the left flange 1, the plurality of limiting grooves 15 are arranged in one-to-one correspondence with and communicate with the plurality of first screw hole sections 11, and the locking nut 14 is located in the limiting groove 15.

[0031] After being screwed, part of the locking nut 14 is located in the limiting groove 15, so as to increase the contact area with the left flange 1 and improve the stability.

[0032] In some optional embodiments, a plurality of hexagonal grooves 16 are formed on the end face of the right flange 2 away from the left flange 1, and the plurality of hexagonal grooves 16 are arranged one-to-one with the plurality of first bolts 4, the head nut of the first bolt 4 is a hexagonal nut, and the head nut of the first bolt 4 is located in the hexagonal groove 16.

[0033] The first bolt 4 is inserted into the first bolt hole 3 of the right flange 2 and the left flange 1, a part of the head nut of the first bolt 4 is located in the hexagonal groove 16, the position of the first bolt 4 is guided and limited through the hexagonal groove 16, the positioning hole 7 on the first bolt 4 is coaxial with the sliding hole section 12, and installation of the second screw rod 6 is facilitated.

[0034] In some optional embodiments, an annular groove 17 is formed on the end face of the left flange 1 close to the right flange 2, an annular boss 18 is fixedly connected to the end face of the right flange 2 close to the left flange 1, and the annular boss 18 extends into the annular groove 17.

[0035] In some optional embodiments, a sealing gasket 19 is clamped between the annular boss 18 and the annular groove 17.

[0036] In use, the sealing gasket 19 is placed in the annular groove 17, the left flange 1 and the right flange 2 are close to each other, the annular boss 18 extends into the annular groove 17, the first bolt 4 passes through the right flange 2 and the left flange 1, a part of the head nut of the first bolt 4 is located in the hexagonal groove 16, then the first nut 5 is tightened, the end faces of the left flange 1 and the right flange 2 are tightly attached to each other and the sealing gasket 19 is extruded, and sealing is realized.

[0037] At this time, the positioning hole 7 is opposite to the sliding hole section 12, the second threaded section 10 of the second screw rod 6 sequentially penetrates the first threaded section 11, the sliding hole section 12, and the positioning hole 7 of the first bolt 4, and is then tightened on the second threaded section 13, and the first threaded section 8 is tightened on the first threaded section 11, and further locking is realized.

[0038] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0039] The above-described embodiments are merely preferred modes of the present application, and are not intended to limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those of ordinary skill in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A leak-proof flange sealing connection device, characterized in that, include: A left flange (1) and a right flange (2) are provided, and a plurality of first bolt holes (3) are provided on the left flange (1) and the right flange (2). A first bolt (4) passes through the first bolt hole (3) on the right flange (2) and the first bolt hole (3) on the left flange (1) in sequence and is tightened by a first nut (5). The first nut (5) is pressed against the end face of the left flange (1), and the head nut of the first bolt (4) is pressed against the end face of the right flange (2). The left flange (1) has several second screw holes on its side wall. The axis of the second screw holes is perpendicular to the axis of the first bolt hole (3). The several second screw holes are arranged and connected to the several first bolt holes (3) one by one. The second screw holes are threaded with second screws (6). The screw of the first bolt (4) has a positioning hole (7). After the first bolt (4) is tightened by the first nut (5), the positioning hole (7) is coaxial with the second screw hole. The second screw (6) passes through the positioning hole (7).

2. The leak-proof flange sealing connection device according to claim 1, characterized in that: The second screw (6) is divided into three sections, namely the first threaded section (8), the smooth section (9), and the second threaded section (10). The second screw hole is divided into three sections, namely the first screw hole section (11), the sliding hole section (12), and the second screw hole section (13) from the outside to the inside. The sliding hole section (12) passes through both sides of the first bolt hole (3). The first threaded section (8) is threadedly connected to the first screw hole section (11). The smooth section (9) is slidably connected to the sliding hole section (12) and the positioning hole (7). The second threaded section (10) is threadedly connected to the second screw hole section (13).

3. The leak-proof flange sealing connection device according to claim 2, characterized in that: The diameters of the first threaded section (8), the smooth rod section (9), and the second threaded section (10) decrease sequentially.

4. The leak-proof flange sealing connection device according to claim 2, characterized in that: A locking nut (14) is fixed to the end of the first threaded section (8).

5. The leak-proof flange sealing connection device according to claim 4, characterized in that: The locking nut (14) is cylindrical. Several limiting grooves (15) are provided on the side wall of the left flange (1). Several limiting grooves (15) are provided and connected to several first screw hole segments (11) in a one-to-one correspondence. The locking nut (14) is located in the limiting groove (15).

6. The leak-proof flange sealing connection device according to claim 1, characterized in that: The right flange (2) has several hexagonal grooves (16) on its end face away from the left flange (1). The hexagonal grooves (16) are arranged in a one-to-one correspondence with several first bolts (4). The head nut of the first bolt (4) is a hexagonal nut, and the head nut of the first bolt (4) is located in the hexagonal groove (16).

7. The leak-proof flange sealing connection device according to claim 1, characterized in that: An annular groove (17) is provided on the end face of the left flange (1) near the right flange (2), and an annular boss (18) is fixedly connected to the end face of the right flange (2) near the left flange (1), with the annular boss (18) extending into the annular groove (17).

8. The leak-proof flange sealing connection device according to claim 7, characterized in that: A sealing gasket (19) is sandwiched between the annular boss (18) and the annular groove (17).

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