Leakage-proof flange structure

Abstract

The utility model relates to the technical field of flanges, in particular to a leakproof flange structure which comprises a first flange and a second flange which are locked through a fixing screw and a fixing nut and further comprises a first sealing assembly, and the connecting position of the first flange and the second flange is a sealing position. The first sealing assembly is arranged on the peripheral side of the sealing part; the first sealing assembly comprises a clamping ring and a sealing gasket, and the clamping ring comprises two semi-rings which are oppositely arranged; one ends of the two semi-rings are hinged, and the other ends are detachably connected; the sealing gaskets are arranged on the inner walls of the two semi-rings and are matched with the semi-rings; the two semi-rings are arranged at the sealing position in an embracing mode and abut against the peripheral side of the sealing position through sealing gaskets. The flange has the advantages that the sealing performance between the two flanges is improved, leakage is not prone to occurring, and long-term use of the flanges is facilitated.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of flanges, in particular to a leakproof flange structure. BACKGROUND

[0002] With reference to Figure 1 Two flanges are often used to connect pipes, and the two flanges are respectively referred to as a first flange 1 and a second flange 2. The first flange 1 and the second flange 2 are locked by fixing screws 3 and fixing nuts 4. There is fluid in the pipe. After being used for a long time under the condition of high pressure for many years, the sealing part between the two flanges leaks. Since the pipes at both ends of the flanges are connected to other places, the sealing cannot be fitted; if the two flanges are disassembled, the entire pipeline needs to be stopped and the fluid in the pipe needs to be discharged, which is high in cost. CONTENT OF THE UTILITY MODEL

[0003] In order to improve the sealing between the two flanges, prevent leakage, and facilitate long-term use of the flanges, the application provides a leakproof flange structure.

[0004] The leakproof flange structure provided by the application adopts the following technical scheme:

[0005] The leakproof flange structure comprises a first flange and a second flange, the first flange and the second flange are locked by fixing screws and fixing nuts, and further comprises a first sealing assembly, the connection part of the first flange and the second flange is a sealing part, and the first sealing assembly is arranged on the circumferential side of the sealing part.

[0006] The first sealing assembly comprises a clamping ring and a sealing pad, the clamping ring comprises two half rings arranged oppositely, one end of the two half rings is hinged, and the other end is detachably connected, the sealing pad is arranged on the inner wall of the two half rings and is matched with the half rings, and the two half rings are arranged around the sealing part and abut against the circumferential side of the sealing part through the sealing pad.

[0007] By adopting the above technical scheme, the two half rings are arranged, and the sealing pad is arranged in the middle, so that the sealing between the first flange and the second flange can be improved, leakage can be prevented, long-term use of the flanges is facilitated, the sealing does not need to be fitted from the pipe at both ends of the flanges, and the entire pipeline does not need to be stopped to discharge the fluid in the pipe, so that the operation is simple and convenient and cost is saved.

[0008] Optionally, an installation groove is formed in the inner wall of the half ring, and the sealing pad is clamped in the installation groove.

[0009] By adopting the above technical scheme, the sealing pad can be positioned, and the stability of installation of the sealing pad is improved.

[0010] Optionally, the sealing gasket is fixedly connected with a sealing reinforcing gasket at one end close to the detachable connection of the half ring, a clamping groove for clamping the sealing reinforcing gasket is formed on the end face of the half ring close to the detachable connection, and the clamping groove is in communication with the mounting groove; when the two half rings are buckled, the sealing reinforcing gaskets on the two half rings abut against each other.

[0011] By adopting the above technical scheme, the sealing reinforcing gasket increases the sealing area and further improves the sealing performance.

[0012] Optionally, the locking bolt is arranged, and a fixing groove is formed on the outer wall of one end of the two half rings; the locking bolt penetrates through the side walls of the two fixing grooves and the two sealing reinforcing gaskets and is locked by a locking nut.

[0013] By adopting the above technical scheme, the detachable connection of the end of the half ring is realized, and the structure is simple and convenient and stable to install.

[0014] Optionally, the second sealing assembly is further arranged, and the second sealing assembly comprises a sealing nut; the sealing nut comprises a fixed section and a sealing section in communication with each other, and one end of the fixed section away from the sealing section is closed; the inner wall of the fixed section is threadedly connected with the end of the fixing screw, the sealing section is covered on the fixing nut, and one end of the sealing section away from the fixed section is fixedly connected with a sealing ring; the sealing section abuts against the first flange and the second flange through the sealing ring.

[0015] By adopting the above technical scheme, there is also a gap between the fixing screw and the fixing nut for fixing the first flange and the second flange, and there is also a leakage problem, so the sealing nut and the sealing ring are separately arranged at the fixing screw and the fixing nut, one sealing is increased at each of the fixing screw and the fixing nut, and the overall sealing is formed, the plugging work can be quickly completed, and the leakage is further reduced.

[0016] Optionally, a plurality of hand holding notches are formed on the outer wall of the fixed section.

[0017] By adopting the above technical scheme, the operator can hold and twist the sealing nut.

[0018] In summary, the present application has at least one of the following beneficial technical effects:

[0019] 1. Two half rings are arranged, a sealing gasket is arranged in the middle, so that the sealing performance between the first flange and the second flange can be improved, the leakage is not easy, the long-term use of the flange is facilitated, and it is not necessary to sleeve the sealing from the pipelines at both ends of the flange, nor to stop the entire pipeline to discharge the fluid in the pipeline, so that the operation is simple and convenient and cost is saved;

[0020] 2. The arrangement of the sealing reinforcing pad increases the sealing area and further improves the sealing performance; the clamping groove provides installation and limiting space for the sealing reinforcing pad, and the installation is convenient and stable;

[0021] 3. There is also a gap between the fixing screw and the fixing nut of the first flange and the second flange, and there is a leakage problem. Therefore, a sealing nut and a sealing ring are separately arranged at the fixing screw and the fixing nut, one sealing is added at each fixing screw and fixing nut, and the overall sealing is formed, the leaking work can be quickly completed, and the leakage is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of a structure without the first sealing assembly and the second sealing assembly.

[0023] Figure 2 is a whole structural schematic view of a leakage-proof flange structure according to an embodiment of the present application.

[0024] Figure 3 is a structural schematic view of a structure after hiding a half ring in the embodiment of the present application.

[0025] Figure 4 is Figure 3 is an enlarged view of position A in

[0026] Figure 5 is a structural schematic view of an installation groove and a clamping groove in the embodiment of the present application.

[0027] Figure 6 is Figure 3 is an enlarged view of position B in

[0028] Label explanation: 1, first flange; 2, second flange; 3, fixing screw; 4, fixing nut; 5, clamping ring; 51, half ring; 52, installation groove; 53, clamping groove; 54, fixing groove; 6, sealing pad; 61, sealing reinforcing pad; 7, sealing nut; 71, fixing section; 72, sealing section; 73, hand holding notch; 8, sealing ring; 9, locking bolt. DETAILED DESCRIPTION

[0029] The following will be described in detail in combination with the accompanying Figures 1-6 The present application will be further described in detail.

[0030] The present application discloses a leakage-proof flange structure. Referring to Figures 1-3The application discloses a leakage-proof flange structure, which comprises a first flange 1 and a second flange 2, the first flange 1 and the second flange 2 are locked by a fixing screw 3 and a fixing nut 4, and further comprises a first sealing assembly, a connecting position of the first flange 1 and the second flange 2 is a sealing position, and the first sealing assembly is arranged on a circumferential side of the sealing position. The first sealing assembly comprises a clamping ring 5 and a sealing gasket 6, the clamping ring 5 comprises two half rings 51 which are oppositely arranged; one end of the two half rings 51 is hinged, and the other end is detachably connected; the hinge is a mature prior art, and a specific hinge mode can be selected according to actual conditions, and the embodiment of the application will not be repeated. The sealing gasket 6 is arranged on the inner wall of the two half rings 51 and is matched with the half rings 51; the two half rings 51 are arranged around the sealing position and abut against the circumferential side of the sealing position through the sealing gasket 6.

[0031] Two half rings 51 are arranged, and a sealing gasket 6 is arranged in the middle, so that the sealing property between the first flange 1 and the second flange 2 can be improved, leakage is avoided, the flange is convenient for long-term use, the sealing does not need to be sleeved from the pipeline at two ends of the flange, and the whole pipeline does not need to be stopped to discharge fluid in the pipeline, so that the operation is simple and convenient and cost can be saved.

[0032] With reference to Figures 2-5 An installation groove 52 is formed in the inner wall of the half ring 51, and the sealing gasket 6 is clamped in the installation groove 52, so that the sealing gasket 6 is positioned and the stability of installation of the sealing gasket 6 is improved. The sealing gasket 6 is integrally formed with a sealing reinforcing pad 61 at one end close to the detachable connecting position of the half ring 51, a clamping groove 53 for clamping the sealing reinforcing pad 61 is formed in the end face of the half ring 51 close to the detachable connecting position of the half ring 51, and the clamping groove 53 is communicated with the installation groove 52; when the two half rings 51 are buckled, the sealing reinforcing pads 61 on the two half rings 51 abut against each other. The sealing reinforcing pad 61 increases the sealing area and further improves the sealing property. The clamping groove 53 provides installation and limiting space for the sealing reinforcing pad 61, and the installation is convenient and stable.

[0033] With reference to Figures 2-4 Further, a locking bolt 9 is arranged, and a fixing groove 54 is formed in the outer wall of the detachable connecting end of the two half rings 51; the locking bolt 9 penetrates through the side walls of the two fixing grooves 54 and the two sealing reinforcing pads 61 and is locked by a locking nut, and the locking nut is not shown in the specification and drawings of the embodiment of the application and can be selected and installed according to actual conditions. The detachable connection of the end of the half ring 51 is realized, the structure is simple, and the installation is convenient and stable.

[0034] With reference to Figures 2-3 And Figure 6The second sealing assembly comprises a sealing nut 7, the sealing nut 7 comprises a fixed segment 71 and a sealing segment 72 which are communicated with each other, and an end of the fixed segment 71 away from the sealing segment 72 is closed; an inner wall of the fixed segment 71 is threadedly connected with an end of the fixed screw 3, the sealing segment 72 is covered on the fixed nut 4, and an end of the sealing segment 72 away from the fixed segment 71 is fixedly connected with a sealing ring 8; the sealing segment 72 abuts against the first flange 1 and the second flange 2 through the sealing ring 8. There is also a gap between the fixed screw 3 and the fixed nut 4 which fix the first flange 1 and the second flange 2, and there is also a leakage problem, therefore, the sealing nut 7 and the sealing ring 8 are separately arranged at the fixed screw 3 and the fixed nut 4, one sealing is added at each of the fixed screw 3 and the fixed nut 4, and the whole sealing is formed, the leaking work can be quickly completed, and the leakage is further reduced. A plurality of hand holding notches 73 are arranged on an outer wall of the fixed segment 71, so as to facilitate an operator to hold and twist the sealing nut 7.

[0035] The implementation principle of the anti-leakage flange structure is as follows: when the connection part of the first flange 1 and the second flange 2 is sealed, the clamping ring 5 is opened and clamped on the sealing part, then the clamping ring 5 is closed, and the locking bolt 9 and the locking nut are locked; when the leakage part of the fixed bolt and the fixed nut 4 is sealed, the sealing nut 7 is screwed to the end of the fixed bolt, and the sealing ring 8 is tightly abutted against the first flange 1 and the second flange 2.

[0036] The above are the preferred embodiments of the present application, and are not used to limit the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A leakproof flange structure comprising a first flange (1) and a second flange (2), the first flange (1) and the second flange (2) being locked by a fixing screw (3) and a fixing nut (4), characterized in that: The first sealing assembly is arranged on the circumferential side of the sealing position. The first sealing assembly comprises a clamping ring (5) and a sealing gasket (6), the clamping ring (5) comprises two half rings (51) arranged oppositely, one end of the two half rings (51) is hinged, and the other end is detachably connected, the sealing gasket (6) is arranged on the inner wall of the two half rings (51) and is matched with the half rings (51), and the two half rings (51) are arranged on the sealing position and abut against the circumferential side of the sealing position through the sealing gasket (6).

2. A leakproof flange structure according to claim 1, characterized in that: An installation groove (52) is arranged on the inner wall of the half ring (51), and the sealing gasket (6) is clamped in the installation groove (52).

3. A leakproof flange structure according to claim 2, characterized in that: The sealing gasket (6) is fixedly connected with a sealing reinforcing gasket (61) at one end close to the detachable connection position of the half ring (51), a clamping groove (53) for clamping the sealing reinforcing gasket (61) is arranged on the end face of the half ring (51) close to the detachable connection position, and the clamping groove (53) is in communication with the installation groove (52); when the two half rings (51) are buckled, the sealing reinforcing gaskets (61) on the two half rings (51) abut against each other.

4. A leakproof flange structure according to claim 3, characterized in that: A locking bolt (9) is further arranged, and a fixing groove (54) is arranged on the outer wall of the detachable connection end of the two half rings (51); the locking bolt (9) penetrates the side walls of the two fixing grooves (54) and the two sealing reinforcing gaskets (61) at the same time, and is locked by a locking nut.

5. A leakproof flange structure according to any one of claims 1-4, characterized in that: The second sealing assembly comprises a sealing nut (7), the sealing nut (7) comprises a fixed segment (71) and a sealing segment (72) in communication with each other, one end of the fixed segment (71) away from the sealing segment (72) is closed, the inner wall of the fixed segment (71) is threadedly connected with the end of the fixing screw (3), the sealing segment (72) is arranged on the fixing nut (4), and the sealing segment (72) is fixedly connected with a sealing ring (8) at one end away from the fixed segment (71); the sealing segment (72) abuts against the first flange (1) and the second flange (2) through the sealing ring (8).

6. A leakproof flange structure according to claim 5, characterized in that: A plurality of hand holding notches (73) are arranged on the outer wall of the fixed segment (71).

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