Multi-layer sealing high temperature and high pressure flange structure

Abstract

This utility model provides a multi-layer sealing high-temperature and high-pressure flange structure, relating to the field of flange technology, including: a first flange; a second flange disposed at the lower part of the first flange; multiple sets of mounting holes arranged in a ring array on the outside of the first flange; multiple sets of fixing threaded rods arranged in a ring array inside the second flange; the ends of the multiple sets of fixing threaded rods are respectively inserted into the multiple sets of mounting holes; the ends of the multiple sets of fixing threaded rods are all threadedly connected to nuts; and an auxiliary groove is provided on the outside of the second flange. By pushing the sealing ring, the movement of the sealing ring will block the connection between the first flange and the second flange, forming a metal barrier to isolate the medium from the sealing surface. This solves the problem that with prolonged use of the flange, the bolt preload will decrease, leading to gaps at the flange connection, which can become channels for medium leakage.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, and in particular to a multi-layer sealing high-temperature and high-pressure flange structure. Background Technology

[0002] In extreme industrial conditions such as high temperature, high pressure, strong corrosion, vibration and shock, in order to achieve reliable sealing of pipelines and ensure the safe and stable operation of pipeline systems, workers usually use multi-layer sealing high temperature and high pressure flange structures to connect pipelines. Existing multi-layer sealing high temperature and high pressure flange structures are usually composed of flanges, sealing rings and sealing rings.

[0003] For example, utility model application CN202321647028.5 discloses a bolted connection flange for a high-temperature and high-pressure pump. Specifically, it includes a left flange, a butt sleeve fixedly welded to one side of the left flange, an arc-shaped surface on the outer side of the butt sleeve, a right flange fitted onto the outer side of the butt sleeve, a pump pipe fixedly welded to one side of the left flange, a sealing ring pressed onto one side of the left flange, and a bolt fitted inside the left flange. A gasket is fitted onto the outer side of one end of the bolt. This bolted connection flange for the high-temperature and high-pressure pump facilitates quick and easy connection to the right flange by fixing and welding the butt sleeve to one side of the left flange, thereby improving installation efficiency. The sealing ring design improves sealing performance and prevents water leakage between the left and right flanges. By inserting the bolts into the left and right flanges and fitting the gasket and spring plate onto the outer side of the bolts, and then rotating and tightening the nuts and bolts, the bolts are easily fixed. The design of the nuts, connecting sleeve, and bolts increases the bolt tightening connection and prevents the bolts from loosening.

[0004] However, in terms of the current traditional multi-layer sealing high-temperature and high-pressure flange structure, the existing flanges rely solely on multi-layer sealing elements and bolt pre-tightening. However, in industrial conditions of vibration and impact, as the flange is used for a long time, the bolt pre-tightening force will decrease, which will cause gaps to appear at the flange connection. These gaps will become channels for medium leakage, accelerating the aging and wear of the flange. At the same time, the leaked medium can easily cause safety accidents, making it inconvenient to use. Utility Model Content

[0005] In view of this, the present invention provides a multi-layer sealing high-temperature and high-pressure flange structure, which has the feature of forming a physical barrier at the flange connection, thereby greatly improving the reliability of the flange.

[0006] This utility model provides a multi-layer sealing high-temperature and high-pressure flange structure, specifically including: a first flange; a second flange disposed at the lower part of the first flange; multiple sets of mounting holes arranged in a ring array on the outside of the first flange; multiple sets of fixing threaded rods arranged in a ring array inside the second flange; the ends of the multiple sets of fixing threaded rods are respectively inserted into the multiple sets of mounting holes; the ends of the multiple sets of fixing threaded rods are all threadedly connected to nuts; an auxiliary groove is provided on the outside of the second flange; an auxiliary slider is slidably connected in the auxiliary groove; a sealing ring is fixedly connected to the outside of the auxiliary slider; sealing rings are provided on the outside of both the first flange and the second flange; the positions of the two sealing rings are aligned.

[0007] Optionally, the bottom end face of the first flange is provided with a first sealing groove; the top end face of the second flange is fixedly connected with a first sealing ring; the first sealing ring is inserted into the first sealing groove; the bottom end face of the first flange is fixedly connected with a second sealing ring; the top end face of the second flange is provided with a second sealing groove; the second sealing ring is inserted into the second sealing groove; the second sealing ring is disposed inside the first sealing ring.

[0008] Optionally, the bottom surface of the auxiliary slider is fixedly connected to multiple sets of connecting springs in a ring array; the ends of the multiple sets of connecting springs are all fixedly connected to the auxiliary groove; the inner side of the auxiliary slider is fixedly connected to multiple sets of guide sliders in a ring array; multiple sets of guide grooves are formed in a ring array in the auxiliary groove; the multiple sets of guide sliders are slidably connected to the multiple sets of guide grooves respectively.

[0009] Optionally, the sealing ring is fixedly connected to multiple sets of connecting arc plates in a ring array on its exterior; each set of connecting arc plates has a through-hole for fixing; the first flange is fixedly connected to multiple sets of fixing brackets in a ring array on its exterior; the multiple sets of connecting arc plates are aligned with the positions of the multiple sets of fixing brackets; each set of fixing brackets has a slidably connected fixing rod; each set of fixing rods is inserted into the multiple sets of fixing holes; each set of fixing rods has a connecting plate fixedly connected to its end; each set of connecting plates has a fixing spring fixedly connected to its inner side; and each set of fixing springs has its end fixedly connected to the exterior of the multiple sets of fixing brackets.

[0010] Optionally, guide rods are fixedly connected to the outside of each of the multiple sets of fixed frames; extrusion slides are slidably connected to the outside of each of the multiple sets of guide rods; inclined surfaces are provided on the outside of each of the multiple sets of extrusion slides; auxiliary springs are fixedly connected to the inside of each of the multiple sets of extrusion slides; multiple auxiliary springs are respectively fixedly connected to the outside of the multiple sets of fixed frames; and connecting rings are fixedly connected to the outside of each of the multiple sets of extrusion slides.

[0011] Optionally, the outer surface of the second flange is provided with multiple sets of mounting arc grooves in a ring array; the multiple sets of mounting arc grooves are respectively aligned with the positions of multiple sets of mounting holes; and multiple sets of fixing threaded rods are respectively arranged in the multiple sets of mounting arc grooves.

[0012] Beneficial effects After the first and second flanges are fixed with the threaded rods, the operator can push the sealing ring. As the sealing ring moves, it blocks the connection between the first and second flanges, forming a metal barrier that isolates the medium from the sealing surface and blocks the leakage path. During the movement of the sealing ring, the connecting arc plate is inserted into the fixing frame. Subsequently, through a series of transmissions, the fixing rod is inserted into the fixing hole, automatically fixing the sealing ring and preventing it from shifting. This provides more comprehensive sealing protection, reduces the risk of leakage due to preload loss, and significantly improves the reliability of the multi-layer sealing high-temperature and high-pressure flange structure. At the same time, the rigid connection formed by the fixed sealing ring can improve the overall structural rigidity, absorb vibration energy, resist impact loads, and avoid sealing failure due to external disturbances, effectively improving the practicality of the multi-layer sealing high-temperature and high-pressure flange structure. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0014] In the attached diagram: Figure 1 This is a schematic diagram of the isometric structure of this utility model.

[0015] Figure 2 This is an isometric structural schematic diagram of the present invention viewed from below.

[0016] Figure 3 This is an isometric structural diagram of the mounting hole of this utility model.

[0017] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0018] Figure 5 This is a utility model Figure 4 A magnified structural diagram at point A.

[0019] Figure 6 This is an isometric structural diagram of the connecting ring of this utility model.

[0020] Figure 7 This is a utility model Figure 6 A magnified structural diagram at point B.

[0021] List of reference numerals 1. First flange; 101. Second flange; 102. Mounting arc groove; 103. Mounting hole; 104. Fixing threaded rod; 105. Sealing ring; 106. First sealing ring; 107. First sealing groove; 108. Second sealing ring; 109. Second sealing groove; 110. Auxiliary groove; 111. Auxiliary slider; 112. Sealing ring; 113. Guide slider; 114. Guide groove; 115. Connecting spring; 116. Connecting arc plate; 117. Fixing insertion hole; 118. Fixing bracket; 119. Fixing insertion rod; 120. Connecting plate; 121. Fixing spring; 122. Guide rod; 123. Compression slide; 124. Auxiliary spring; 125. Connecting ring. Detailed Implementation

[0022] To make the objectives, solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0023] Example 1: This utility model proposes a multi-layer sealed high-temperature and high-pressure flange structure. Please refer to [reference needed]. Figures 1 to 7 Includes: First flange 1; A second flange 101 is provided at the lower part of the first flange 1; multiple sets of mounting holes 103 are arranged in a ring array on the outside of the first flange 1; multiple sets of fixing threaded rods 104 are arranged in a ring array inside the second flange 101; the ends of the multiple sets of fixing threaded rods 104 are respectively inserted into the multiple sets of mounting holes 103; the ends of the multiple sets of fixing threaded rods 104 are all threaded with nuts; an auxiliary groove 110 is provided on the outside of the second flange 101; an auxiliary slider 111 is slidably connected in the auxiliary groove 110; a sealing ring 112 is fixedly connected to the outside of the auxiliary slider 111; a sealing ring 105 is provided on the outside of both the first flange 1 and the second flange 101; the positions of the two sealing rings 105 are aligned.

[0024] The bottom end face of the first flange 1 is provided with a first sealing groove 107; the top end face of the second flange 101 is fixedly connected with a first sealing ring 106; the first sealing ring 106 is inserted into the first sealing groove 107; the bottom end face of the first flange 1 is fixedly connected with a second sealing ring 108; the top end face of the second flange 101 is provided with a second sealing groove 109; the second sealing ring 108 is inserted into the second sealing groove 109; the second sealing ring 108 is located inside the first sealing ring 106.

[0025] The bottom surface of the auxiliary slider 111 is fixedly connected to multiple sets of connecting springs 115 in a ring array; the ends of the multiple sets of connecting springs 115 are all fixedly connected to the auxiliary groove 110; the inner side of the auxiliary slider 111 is fixedly connected to multiple sets of guide sliders 113 in a ring array; multiple sets of guide grooves 114 are opened in a ring array in the auxiliary groove 110; the multiple sets of guide sliders 113 are slidably connected to the multiple sets of guide grooves 114 respectively.

[0026] The sealing ring 112 is fixedly connected to multiple sets of connecting arc plates 116 in a ring array on its exterior; each set of connecting arc plates 116 has a through-hole 117 on its exterior; the first flange 1 is fixedly connected to multiple sets of fixing brackets 118 in a ring array on its exterior; the multiple sets of connecting arc plates 116 are aligned with the positions of the multiple sets of fixing brackets 118; each set of fixing brackets 118 has a slidably connected fixing rod 119; each set of fixing rods 119 is inserted into the multiple sets of fixing holes 117; each set of fixing rods 119 has a fixedly connected connecting plate 120 at its end; each set of connecting plates 120 has a fixedly connected fixing spring 121 on its inner side; and each set of fixing spring 121 has a fixedly connected fixing spring at its end on the exterior of the multiple sets of fixing brackets 118.

[0027] Guide rods 122 are fixedly connected to the outside of multiple sets of fixed brackets 118; extrusion slides 123 are slidably connected to the outside of multiple sets of guide rods 122; inclined surfaces are provided on the outside of multiple sets of extrusion slides 123; auxiliary springs 124 are fixedly connected to the inside of multiple sets of extrusion slides 123; multiple auxiliary springs 124 are respectively fixedly connected to the outside of multiple sets of fixed brackets 118; and connecting rings 125 are fixedly connected to the outside of multiple sets of extrusion slides 123.

[0028] The specific usage and function of this embodiment: The flange is multi-layered sealed by the first sealing ring 106, the second sealing ring 108, and the sealing ring 105, improving the sealing effect at the connection between the first flange 1 and the second flange 101. After the first flange 1 and the second flange 101 are fixed by the fixed threaded rod 104, the operator can push the sealing ring 112, causing the sealing ring 112 to drive the auxiliary slider 111 to slide in the auxiliary groove 110 and stretch the connecting spring 115. Simultaneously, during the movement of the auxiliary slider 111, it will drive the guide slider 113 to slide in the guide groove 114, providing guidance for the auxiliary slider 111. As the sealing ring 112 moves, it will block the connection between the first flange 1 and the second flange 101. During the movement of the sealing ring 112, the connecting arc plate 116 will be inserted into the fixing bracket 118. As the connecting arc plate 116 is inserted, it will squeeze the fixing rod 119, causing the fixing rod 119 to drive the connecting plate 120 to move and stretch the fixing spring 121. After plate 116 is fully inserted into the fixing bracket 118, the fixing hole 117 is aligned with the fixing rod 119. At this time, the fixing rod 119 will return to its original position as the fixing spring 121 rebounds, allowing the fixing rod 119 to be inserted into the fixing hole 117, automatically fixing the sealing ring 112. When the flange needs to be inspected, simply push the connecting ring 125, causing the connecting ring 125 to drive multiple sets of compression slides 123 to slide simultaneously along the guide rod 122 and compress the auxiliary spring 124. As the compression slides 123... The connecting plate 120 will be squeezed, causing the connecting plate 120 to move the fixed insertion rod 119 and disengage it from the fixed insertion hole 117. At this time, the sealing ring 112 will automatically reset with the rebound of the connecting spring 115. The connecting spring 115 and the auxiliary spring 124 in this application are both springs with moderate stiffness made of high temperature resistant alloy wire. They have the effect of not annealing or becoming brittle at high temperatures and having small elasticity decay over long-term use. At the same time, they can ensure that the sealing ring 112 can be pushed without effort and prevent accidental release caused by minor vibration or accidental contact.

[0029] Example 2: Based on Example 1. Please refer to... Figures 1 to 3 It includes: mounting grooves 102, with multiple sets of mounting grooves 102 arranged in a ring array on the outside of the second flange 101; the multiple sets of mounting grooves 102 are respectively aligned with the positions of multiple sets of mounting holes 103; and multiple sets of fixing threaded rods 104 are respectively arranged in the multiple sets of mounting grooves 102.

[0030] The specific usage and function of this embodiment: When the mounting hole 103 is misaligned during the assembly of the first flange 1 and the second flange 101 due to the setting of the mounting groove 102, the bolt can be freely adjusted in circumferential position along the mounting groove 102, avoiding the deformation of the flange caused by forcibly tightening the fixing thread rod 104, and indirectly ensuring the flatness of the sealing surface.

[0031] The following points should be noted in this article: 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0032] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0033] The above are merely specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.

Claims

1. Multi-layer sealed high-temperature and high-pressure flange structure, including: A first flange (1); a second flange (101) is provided at the lower part of the first flange (1); multiple sets of mounting holes (103) are provided in a ring array on the outside of the first flange (1); characterized in that multiple sets of fixing threaded rods (104) are provided in a ring array inside the second flange (101); the ends of the multiple sets of fixing threaded rods (104) are respectively inserted into the multiple sets of mounting holes (103); the ends of the multiple sets of fixing threaded rods (104) are all threaded with nuts; an auxiliary groove (110) is provided on the outside of the second flange (101); an auxiliary slider (111) is slidably connected in the auxiliary groove (110); a sealing ring (112) is fixedly connected to the outside of the auxiliary slider (111); a sealing ring (105) is provided on the outside of both the first flange (1) and the second flange (101); the positions of the two sealing rings (105) are aligned.

2. The multi-layer sealing high-temperature and high-pressure flange structure as described in claim 1, characterized in that: The bottom end face of the first flange (1) is provided with a first sealing groove (107); the top end face of the second flange (101) is fixedly connected with a first sealing ring (106); the first sealing ring (106) is inserted into the first sealing groove (107); the bottom end face of the first flange (1) is fixedly connected with a second sealing ring (108); the top end face of the second flange (101) is provided with a second sealing groove (109); the second sealing ring (108) is inserted into the second sealing groove (109); the second sealing ring (108) is located inside the first sealing ring (106).

3. The multi-layer sealing high-temperature and high-pressure flange structure as described in claim 1, characterized in that: The bottom surface of the auxiliary slider (111) is fixedly connected to multiple sets of connecting springs (115) in a ring array; the ends of the multiple sets of connecting springs (115) are all fixedly connected in the auxiliary groove (110); the inner side of the auxiliary slider (111) is fixedly connected to multiple sets of guide sliders (113) in a ring array; multiple sets of guide grooves (114) are opened in a ring array in the auxiliary groove (110); the multiple sets of guide sliders (113) are slidably connected in the multiple sets of guide grooves (114).

4. The multi-layer sealing high-temperature and high-pressure flange structure as described in claim 1, characterized in that: The sealing ring (112) is fixedly connected to multiple sets of connecting arc plates (116) in a ring array on the outside; each set of connecting arc plates (116) has a fixed insertion hole (117) through it; the first flange (1) is fixedly connected to multiple sets of fixing brackets (118) in a ring array on the outside; the multiple sets of connecting arc plates (116) are aligned with the positions of the multiple sets of fixing brackets (118); each set of fixing brackets (118) has a fixed insertion rod (119) slidably connected inside it; each set of fixing insertion rods (119) is inserted into the multiple sets of fixing insertion holes (117); each set of fixing insertion rods (119) has a connecting plate (120) fixedly connected to its end; each set of connecting plates (120) has a fixing spring (121) fixedly connected to its inner side; each set of fixing springs (121) has its end fixedly connected to the outside of the multiple sets of fixing brackets (118).

5. The multi-layer sealing high-temperature and high-pressure flange structure as described in claim 4, characterized in that: Each of the multiple sets of fixed frames (118) is fixedly connected to a guide rod (122); each of the multiple sets of guide rods (122) is slidably connected to a compression slide (123); each of the multiple sets of compression slides (123) has an inclined surface on its exterior; each of the multiple sets of compression slides (123) is fixedly connected to an auxiliary spring (124) on its interior; each of the multiple sets of auxiliary springs (124) is fixedly connected to the exterior of the multiple sets of fixed frames (118); each of the multiple sets of compression slides (123) is fixedly connected to a connecting ring (125).

6. The multi-layer sealing high-temperature and high-pressure flange structure as described in claim 1, characterized in that: The second flange (101) has multiple sets of mounting arc grooves (102) arranged in a ring array on its exterior; the multiple sets of mounting arc grooves (102) are aligned with the positions of multiple sets of mounting holes (103); multiple sets of fixing threaded rods (104) are respectively arranged in the multiple sets of mounting arc grooves (102).

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