An easy-to-assemble high-sealing flange splicing structure

Abstract

The utility model discloses an easy-to-assemble high-sealing flange splicing structure, which belongs to the field of flange technology, and includes a first flange, a second flange, a sealing gasket, a bolt and a nut. The first flange and the second flange are butted, the sealing gasket is arranged between the first flange and the second flange, the bolt passes through the first flange and the second flange, the sealing gasket includes a first sealing gasket and a second sealing gasket, the bolt is located between the first sealing gasket and the second sealing gasket, the first flange and the second flange are both provided with perforations, the first flange is provided with a limiting cylinder for inserting the second flange, a positioning groove is axially provided on the side wall of the limiting cylinder, a positioning block is convexly provided on the outer side wall of the second flange, and when the positioning block and the positioning groove cooperate with each other, the perforations on the first flange and the perforations on the second flange are aligned one by one. The easy-to-assemble high-sealing flange splicing structure of the utility model, after the positioning block and the positioning groove cooperate, can make the perforations between the two flanges correspond one by one, which greatly improves the splicing efficiency of the flanges.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to an easy-to-assemble high-sealing flange splicing structure. Background Art

[0002] In pipeline connection, flanges are important connection components and are widely used in various fluid delivery systems. The flange connection structure refers to a detachable connection structure in which flanges, gaskets and bolts are connected to each other as a combined sealing structure. During installation, the gasket is clamped between the two flanges, and the bolts are passed through the flange on one side, the gasket and the flange on the other side in turn and then tightened by nuts. In the actual installation process, the bolts need to be aligned with the through holes on the flange and the gasket to facilitate bolt installation. For small flanges with small size and light weight, the installer can adjust the flange into place through simple rotation and other actions to facilitate the passage of the bolts. For large flanges with large size and heavy weight, the user's hands need to bear a large load when adjusting the flange position, which is extremely inconvenient to operate.

[0003] In order to solve the above problems, a Chinese patent document with publication number CN220749354U discloses a forged flange, including a connecting rod, a first disc, a partition, an inner cylinder and a second disc. The first disc, the partition and the second disc are spliced ​​together by the connecting rod. The inner ring surface of the partition is welded with the inner cylinder, and the outer ring surface of the inner cylinder is against the inner wall of the first disc and the second disc. When assembling, the inner cylinder can be inserted into a flange disc first, and part of the inner cylinder protrudes from the disc. Then, the other disc is docked with the inner cylinder, so that the two flange discs are spliced ​​together. In this process, the inner cylinder supports the dead weight of the two discs, and then each connecting rod can be installed on the disc after the splicing is completed, so as to avoid the disc from being misaligned during the splicing process. The operator only needs to apply lateral pressure to the disc to reduce the hand load of the operator. However, in actual assembly, after the inner cylinder supports the two discs, the user still needs to manually adjust the position of the flange so that the through holes between the discs correspond. The adjustment process is relatively difficult, and the user needs to spend a long time operating, which is not convenient for quick assembly and the splicing efficiency is not high. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in the prior art, in the prior art, the through holes between two flanges cannot be quickly aligned. Based on this, the utility model provides a high-sealing flange splicing structure that is convenient and quick to assemble.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an easy-to-assemble high-sealing flange splicing structure, including a first flange, a second flange, a sealing gasket, a bolt and a nut, the first flange and the second flange are butt-jointed, the sealing gasket is arranged between the first flange and the second flange, the bolt is installed after passing through the first flange and the second flange in sequence, the sealing gasket includes a first sealing gasket and a second sealing gasket, the bolt is located between the first sealing gasket and the second sealing gasket, the first flange and the second flange are both provided with a through hole for the bolt to pass through, the first flange is provided with a limiting cylinder for the second flange to be inserted, a positioning groove is axially opened on the side wall of the limiting cylinder, a positioning block is convexly provided on the outer side wall of the second flange, and when the positioning block and the positioning groove cooperate with each other, the through holes on the first flange are aligned one by one with the through holes on the second flange.

[0006] Furthermore, the first sealing gasket and the second sealing gasket are both annular structures, a circulation channel is axially opened at the center of the first flange and the second flange, and the first sealing gasket is located on a side of the second sealing gasket close to the circulation channel.

[0007] Furthermore, a first mounting groove and a second mounting groove are formed on the end surface of the first flange, the through hole is provided between the first mounting groove and the second mounting groove, the first sealing gasket is fitted and installed in the first mounting groove, and the second sealing gasket is fitted and installed in the second mounting groove.

[0008] Furthermore, the bottom walls of the first mounting groove and the second mounting groove are configured as wave surfaces.

[0009] Furthermore, the limiting cylinder is arranged along the axial direction of the first flange and is arranged on the end surface of the first flange close to the second flange, and the limiting cylinder and the first flange are an integrally formed structure.

[0010] Furthermore, one end of the positioning groove passes through the end surface of the limiting cylinder away from the first flange.

[0011] Furthermore, the positioning groove is a U-shaped groove, and the positioning block is a U-shaped block that cooperates with the U-shaped groove.

[0012] Furthermore, a sealing groove is provided on the outer wall of the second flange at a side of the positioning block close to the first flange, and a sealing ring is installed in the sealing groove.

[0013] Furthermore, an elastic washer is sleeved on the outside of the bolt, and the elastic washer is squeezed and fixed between the second flange and the nut.

[0014] The beneficial effects of the utility model are as follows: the easy-to-assemble high-sealing flange splicing structure of the utility model improves the connection sealing between the flanges by arranging the first sealing gasket and the second sealing gasket between the first flange and the second flange, and the bolt is located between the first sealing gasket and the second sealing gasket, which is beneficial to the installation of the sealing gasket. At the same time, a positioning groove is arranged on the limiting cylinder of the first flange, and a positioning block is arranged on the second flange. When the positioning block is connected with the positioning groove, the perforations on the first flange and the second flange can correspond one to one, which is beneficial for users to quickly install the bolts, greatly improves the splicing efficiency of the flanges, and is convenient for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a three-dimensional diagram of the easy-to-assemble high-sealing flange splicing structure of the utility model;

[0017] Figure 2 yes Figure 1 A three-dimensional diagram of the easy-to-assemble high-seal flange splicing structure from another perspective;

[0018] Figure 3 yes Figure 2 An exploded view of an easy-to-assemble high-seal flange splicing structure is shown;

[0019] Figure 4 yes Figure 2 The right side view of the easy-to-assemble high-seal flange splicing structure shown;

[0020] Figure 5 yes Figure 4 The cross-sectional view along AA of the easy-to-assemble high-seal flange splicing structure shown.

[0021] In the figure: 1. first flange, 11. first sealing groove, 12. second sealing groove, 13. limiting cylinder, 131. positioning groove, 101. circulation channel, 102. through hole, 2. second flange, 21. positioning block, 22. mounting groove, 23. sealing ring, 3. sealing gasket, 31. first sealing gasket, 32. second sealing gasket, 4. bolt, 41. elastic gasket, 5. nut. DETAILED DESCRIPTION

[0022] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.

[0023] See also Figure 1-Figure 5The utility model provides an easy-to-assemble high-sealing flange splicing structure, including a first flange 1, a second flange 2, a sealing gasket 3, a bolt 4 and a nut 5. The first flange 1 and the second flange 2 are butt-jointed, the sealing gasket 3 is arranged between the first flange 1 and the second flange 2, one end of the bolt 4 passes through the first flange 1 and the second flange 2 in sequence, and then the nut 5 is installed, so that the first flange 1 and the second flange 2 are locked with each other.

[0024] A fluid (liquid or gas) circulation channel 101 is axially opened at the center of the first flange 1 and the second flange 2, and a plurality of through holes 102 are evenly opened at the edges of the first flange 1 and the second flange 2 along the axial direction. The through holes 102 on the first flange 1 and the second flange 2 correspond to each other one by one, and the bolts 4 pass through the corresponding two through holes 102 in sequence.

[0025] As a preferred embodiment, the sealing gasket 3 includes a first sealing gasket 31 and a second sealing gasket 32, both of which are annular structures, the first sealing gasket 31 is located on the side of the second sealing gasket 32 ​​close to the circulation channel 101, and the bolt 4 is located between the first sealing gasket 31 and the second sealing gasket 32. By simultaneously arranging the first sealing gasket 31 and the second sealing gasket 32 ​​between the first flange 1 and the second flange 2, the sealing between the first flange 1 and the second flange 2 is improved through two seals during use, which can effectively prevent fluid leakage. At the same time, when the user installs the sealing gasket 3, there is no need to open a through hole on the sealing gasket 3 for the bolt 4 to pass through, thereby eliminating the trouble of the bolt 4 passing through the sealing gasket 3 when splicing the flanges, which is conducive to the rapid installation of the sealing gasket 3.

[0026] Furthermore, a first mounting groove 11 and a second mounting groove 12 are provided on the end face of the first flange 1, and a through hole 102 is provided between the first mounting groove 11 and the second mounting groove 12. The first sealing gasket 31 is installed in the first mounting groove 11, and the second sealing gasket 32 ​​is installed in the second mounting groove 12. During assembly, the user only needs to install the sealing gasket 3 in the corresponding sealing groove first. Compared with the traditional assembly method in which bolts pass through the sealing gasket, this is more conducive to the installation of the sealing gasket 3.

[0027] In addition, the bottom walls of the first mounting groove 11 and the second mounting groove 12 are configured as wave surfaces, which can increase the contact surface area between the sealing gasket 3 and the mounting grooves, while increasing the difficulty of the fluid passing through the sealing gasket 3, further preventing fluid leakage.

[0028] A limiting cylinder 13 is provided on the edge of the end surface of the first flange 1 near the second flange 2 along the axial direction of the first flange 1. Preferably, the limiting cylinder 13 and the first flange 1 are an integrally formed structure. The limiting cylinder 13 is a cylindrical structure, and the second flange 2 and the limiting cylinder 13 cooperate with each other. During assembly, the second flange 2 is installed in the limiting cylinder 13. By providing the limiting cylinder 13, a certain support effect is provided for the second flange 2, which reduces the load on the user's hand. At the same time, when the second flange 2 is inserted into the limiting cylinder 13, the second flange 2 and the first flange 1 are in a coaxial state, which is convenient for alignment assembly.

[0029] As a preferred embodiment, a positioning groove 131 is provided in the axial direction on the side wall of the limiting cylinder 13, one end of the positioning groove 131 passes through the end face of the limiting cylinder 13 away from the first flange 1, and a positioning block 21 is convexly provided on the outer side wall of the second flange 2, and the positioning block 21 cooperates with the positioning groove 131. During assembly, the positioning block 21 is aligned with the notch on one side of the positioning groove 131, and then the second flange 2 is moved toward the first flange 1 in the axial direction. When the second flange 2 is inserted into the limiting cylinder 13, the positioning block 21 also extends into the positioning groove 131, and the through-holes 102 of the first flange 1 and the through-holes 102 on the second flange 2 are also aligned one by one. At this time, the user can easily pass the bolts 4 through the first flange 1 and the second flange 2, saving the operation time of adjusting the relative position between the two flanges and aligning the through-holes 102, and greatly improving the assembly efficiency.

[0030] Furthermore, the positioning groove 131 is a U-shaped groove, and the positioning block 21 is a U-shaped block matched with the U-shaped groove, and the arc surface at the end of the U-shaped block is conducive to the positioning block 21 entering the positioning groove 131 through the notch of the U-shaped groove. It should be noted that when the first flange 1 and the second flange 2 are installed in place by the bolts 4, the positioning block 21 does not move to the deepest part of the positioning groove 131, that is, the positioning block 21 at this time does not abut against one end of the positioning groove 131 to ensure that the first flange 1 and the second flange 2 are tightly pressed and fixed.

[0031] As a preferred embodiment, a sealing groove 22 is opened on the outer wall of the second flange 2 on the side of the positioning block 21 close to the first flange 1, and a sealing ring 23 is installed in the sealing groove 22. When the second flange 2 is inserted into the limiting cylinder 13, the sealing ring 23 is squeezed and fixed between the second flange 2 and the limiting cylinder 13, thereby further improving the sealing effect of the flange connection structure.

[0032] As a preferred embodiment, an elastic washer 41 is provided on the outside of the bolt 4, and the elastic washer 41 is squeezed and fixed between the second flange 2 and the nut 5. The elastic washer 41 has a certain elasticity. When it is squeezed and deformed, it can prevent the nut 5 from loosening, thereby improving the locking ability and preventing the first flange 1 and the second flange 2 from loosening easily.

[0033] The utility model discloses an easy-to-assemble high-sealing flange splicing structure, by arranging a first sealing gasket 31 and a second sealing gasket 32 ​​between the first flange 1 and the second flange 2, and the bolt 4 is located between the first sealing gasket 31 and the second sealing gasket 32, thereby improving the connection sealing between the flanges and facilitating the installation of the sealing gasket 3. At the same time, a positioning groove 131 is arranged on the limiting cylinder 13 of the first flange 1, and a positioning block 21 is arranged on the second flange 2. When the positioning block 21 is connected with the positioning groove 131, the through holes 102 on the first flange 1 and the second flange 2 can correspond one to one, which is beneficial for users to quickly install the bolt 4, greatly improving the splicing efficiency of the flanges, and facilitating popularization and use.

[0034] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An easy-to-assemble high-sealing flange splicing structure, comprising a first flange, a second flange, a sealing gasket, bolts and nuts, wherein the first flange and the second flange are butted, the sealing gasket is arranged between the first flange and the second flange, and the bolts are installed after passing through the first flange and the second flange in sequence, characterized in that: The sealing gasket includes a first sealing gasket and a second sealing gasket, the bolt is located between the first sealing gasket and the second sealing gasket, the first flange and the second flange are both provided with through holes for the bolt to pass through, the first flange is provided with a limiting cylinder for the second flange to be inserted, a positioning groove is axially opened on the side wall of the limiting cylinder, and a positioning block is protruded on the outer side wall of the second flange, and when the positioning block and the positioning groove cooperate with each other, the through holes on the first flange are aligned one by one with the through holes on the second flange.

2. The easy-to-assemble high-seal flange splicing structure according to claim 1, characterized in that: The first sealing gasket and the second sealing gasket are both annular structures. A circulation channel is axially opened at the center of the first flange and the second flange. The first sealing gasket is located on a side of the second sealing gasket close to the circulation channel.

3. The easy-to-assemble high-seal flange splicing structure according to claim 2, characterized in that: A first mounting groove and a second mounting groove are formed on the end surface of the first flange, the through hole is provided between the first mounting groove and the second mounting groove, the first sealing gasket is fitted and installed in the first mounting groove, and the second sealing gasket is fitted and installed in the second mounting groove.

4. The easy-to-assemble high-seal flange splicing structure according to claim 3, characterized in that: The bottom walls of the first installation groove and the second installation groove are configured as wave surfaces.

5. The easy-to-assemble high-seal flange splicing structure according to claim 1, characterized in that: The limiting cylinder is arranged along the axial direction of the first flange and is arranged on the end surface of the first flange close to the second flange. The limiting cylinder and the first flange are an integrally formed structure.

6. The easy-to-assemble high-seal flange splicing structure according to claim 1, characterized in that: One end of the positioning groove passes through the end surface of the limiting cylinder away from the first flange.

7. The easy-to-assemble high-seal flange splicing structure according to claim 6, characterized in that: The positioning groove is a U-shaped groove, and the positioning block is a U-shaped block matched with the U-shaped groove.

8. The easy-to-assemble high-seal flange splicing structure according to claim 7, characterized in that: A sealing groove is provided on the outer wall of the second flange at a side of the positioning block close to the first flange, and a sealing ring is installed in the sealing groove.

9. The easy-to-assemble high-seal flange splicing structure according to claim 1, characterized in that: An elastic washer is sleeved on the outside of the bolt, and the elastic washer is squeezed and fixed between the second flange and the nut.

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