A lightweight flange with good airtightness

Abstract

This utility model provides a lightweight flange with good airtightness, including a first flange and a second flange, which are coaxial and oppositely arranged. The first flange has an upper sealing end, and the second flange has a lower sealing end. The upper sealing end has a mating sleeve built in, and the outer wall of the mating sleeve has at least one insertion block. The lower sealing end has an insertion sleeve built in, and the insertion sleeve has an insertion ring that matches the mating sleeve. The peripheral wall of the insertion ring has a slot that matches the insertion block. Both the upper and lower sealing ends have a locking buckle on their outer peripheral walls, and the locking buckle is engaged with a locking device. When the mating sleeve is inserted into the insertion sleeve, the insertion block is engaged along the slot to achieve circumferential positioning. Installation is convenient, and a sealing connection can be completed without the need for external tools or additional fasteners.

Description

Technical Field

[0001] This utility model relates to the field of flanges, and in particular to a lightweight flange with good airtightness. Background Technology

[0002] Flanges, as a common mechanical equipment component, are widely used in many industries, especially in the chemical, petroleum, and water treatment sectors. They connect two pipe sections, forming a sealed working channel that effectively maintains the smooth and safe flow of media.

[0003] A leak-proof flange with good airtightness, currently disclosed in Chinese patent application number CN202221495816.2, includes a first flange and a second flange. The axes of the first and second flanges are in the same plane. An annular seat is coaxially provided between the first and second flanges. Lugs are intermittently and equally spaced on the outer surface of the annular seat, parallel to the axis of the annular seat. The lugs are fixedly mounted on the annular seat. A sliding cavity is coaxially formed on the inner wall of the lugs. A sliding ring is coaxially slidably connected within the sliding cavity. A spring is coaxially provided on the side of the sliding ring away from the first flange, with one end of the spring connected to the sliding ring. This invention achieves double sealing of the exhaust pipe during use, avoiding a decrease in sealing performance due to wear of the sealing gasket. Furthermore, its simple structure makes disassembly, assembly, and maintenance very convenient, resulting in high applicability.

[0004] However, the aforementioned patent has certain drawbacks in its use. When the two flange sections are joined, sealing and connection are achieved through an annular seat. During the joining process, it is difficult to ensure the coaxiality between the annular seat and the flange. Manual installation is prone to eccentricity, leading to problems with incomplete sealing. To address this issue, a lightweight flange with good airtightness is proposed. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, which makes it difficult to control the coaxiality during manual installation due to the addition of a ring seat, resulting in poor sealing, this utility model provides a lightweight flange with good airtightness.

[0006] This utility model is achieved using the following technical solution: A lightweight flange with good airtightness includes a first flange and a second flange. The first flange and the second flange are coaxial and arranged opposite to each other. The first flange has an upper sealing end and the second flange has a lower sealing end. The upper sealing end has a built-in mating sleeve, and the outer wall of the mating sleeve has at least one insert block. The lower sealing end has a built-in insert sleeve, and the insert sleeve has an insert ring that matches the docking sleeve. The insert ring has a slot on its peripheral wall that matches the insert block. The outer peripheral walls of the upper sealing end and the lower sealing end are provided with buckles, and locking devices are engaged on the buckles. The docking sleeve is inserted into the insert sleeve, and the insert block is engaged along the slot to achieve circumferential positioning.

[0007] As a preferred embodiment of this utility model, the locking device includes an upper clamp and a lower clamp. One end of the upper clamp and one end of the lower clamp are hinged together. The upper clamp and the lower clamp are symmetrically arranged and surround the outside of the lock. The other end of the lower clamp is provided with a lock hole. The other end of the upper clamp is provided with a bearing opposite to the lock hole. A clamping arm is hinged to the bearing. An adjusting sleeve is provided at the end of the clamping arm. An adjustable fixing pin is built into the adjusting sleeve. The fixing pin cooperates with the lock hole at the other end of the lower clamp to achieve fastening and locking.

[0008] As a preferred embodiment of the present invention, the end of the insert is provided with a pre-compression component, which includes a contact ring and a spring. The contact ring is sleeved inside the insert, one end of the spring abuts against the contact ring, and the other end abuts against the bottom of the insert. When the insert is inserted into the insert, the contact ring is compressed and pushes the spring to generate elastic pre-compression.

[0009] As a preferred embodiment of this utility model, the inner peripheral wall of the mating sleeve is provided with a first sealing ring, which is in close contact with the inner peripheral wall of the insert sleeve, and the outer peripheral wall of the mating sleeve is provided with a second sealing ring, which is in close contact with the outer peripheral wall of the insert sleeve.

[0010] As a preferred embodiment of this utility model, the first flange and the upper sealing end are integrally formed, and the second flange and the lower sealing end are integrally formed. The upper sealing end and the lower sealing end are provided with a plurality of reserved holes, and the reserved holes are equipped with positioning pins.

[0011] In a preferred embodiment of this utility model, the mating sleeve and the insert sleeve are coaxially inserted, with the mating sleeve having an inclined end face at one end inside the first flange and the insert sleeve having an inclined end face at one end inside the second flange.

[0012] Compared with existing technologies, the advantages of this utility model are: 1. When the first flange and the second flange are installed together, align the mating sleeve of the first flange with the insert ring in the insert sleeve of the second flange and push it in axially. The insert block is inserted into the slot to achieve circumferential positioning. When the insert block is fully embedded in the slot, the pre-compression component in the insert sleeve is compressed to generate elastic pre-tightening force, which tightly fits the first flange and the second flange. The installation is convenient and the sealing connection can be completed without the need for external tools or additional fasteners.

[0013] 2. When the insert is fully inserted into the slot at the predetermined position, the latches on the outer periphery of the upper and lower sealing ends fit together, closing the upper and lower clamps of the locking device. The clamping arm rotates around the shaft seat and engages with the locking hole. The fixing pin is pushed into the adjusting sleeve and embedded in the locking hole to achieve radial locking. This makes installation convenient and ensures flange sealing while maintaining a lightweight design.

[0014] 3. The inclined end faces of the mating sleeve and the insert sleeve effectively guide the internal fluid, reduce fluid resistance at the connection, and improve the efficiency of media flow. Attached Figure Description

[0015] Figure 1 This is an overall assembly structure diagram of the first flange and the second flange of this utility model; Figure 2 This is an exploded view of the first flange and the second flange of this utility model; Figure 3 This is a structural diagram of the first flange of this utility model; Figure 4 This is a structural diagram of the second flange of this utility model; Figure 5 This is a structural diagram of the slot of this utility model; Figure 6 This is a sectional view of the first flange and the second flange of this utility model; In the diagram: 1. First flange; 11. Upper sealing end; 12. Butt sleeve; 13. Insert block; 2. Second flange; 21. Lower sealing end; 22. Insert sleeve; 221. Insert ring; 2211. Slot; 3. Pre-compression component; 31. Contact ring; 32. Spring; 4. Reserved hole; 41. Positioning pin; 5. Locking device; 51. Upper clamp; 52. Lower clamp; 53. Shaft seat; 531. Clamping arm; 532. Adjusting sleeve; 533. Fixing pin; 54. Lock hole; 6. Locking buckle; 7. First sealing ring; 8. Second sealing ring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] Example: Please see Figures 1-5A lightweight flange with good airtightness includes a first flange 1 and a second flange 2. The first flange 1 and the second flange 2 are coaxial and arranged opposite to each other. The first flange 1 is provided with an upper sealing end 11, and the second flange 2 is provided with a lower sealing end 21. The upper sealing end 11 is provided with a mating sleeve 12, and the outer wall of the mating sleeve 12 is provided with at least one insert block 13.

[0018] In this embodiment, the first flange 1 and the second flange 2 are two connecting components. When they are connected, they are coaxially arranged, with the upper sealing end 11 and the lower sealing end 21 connected. The first flange 1 and the upper sealing end 11 are integrally formed, and the second flange 2 and the lower sealing end 21 are integrally formed. See details below. Figure 2 The upper sealing end 11 and the lower sealing end 21 are both connection ends. The mating sleeve 12 is specifically built into the upper sealing end 11. The insert block 13 is specifically disposed on the outer wall of the mating sleeve 12 and is evenly distributed along the circumference. At least one insert block 13 is provided, and preferably three insert blocks 13 are provided to improve connection stability and sealing uniformity.

[0019] The lower sealing end 21 has a built-in insert 22, and the insert 22 has a matching insert ring 221. The insert ring 221 has a slot 2211 on its peripheral wall that is adapted to the insert block 13. The outer peripheral walls of the upper sealing end 11 and the lower sealing end 21 are both provided with a buckle 6. The buckle 6 is fitted with a locking device 5. The connecting sleeve 12 is inserted into the insert 22, and the insert block 13 is inserted into the slot 2211 to achieve circumferential positioning.

[0020] In this embodiment, the insert sleeve 22 and the mating sleeve 12 are a matching combination. The insert sleeve 22 is provided with a insert ring 221, the size of which is adapted to the mating sleeve 12. During installation, the mating sleeve 12 is inserted into the insert ring 221. The number of slots 2211 on the peripheral wall of the insert ring 221 is the same as the number of insert blocks 13. The insert block 13 is specifically an L-shaped structure, as detailed in the following figure. Figure 5 After insertion into slot 2211, the insertion block 13 is locked in place by rotation. The vertical section of slot 2211 is used for the initial insertion of the insertion block 13, while the horizontal section is used for locking after rotation to prevent axial disengagement. When installing the first flange 1 and the second flange 2, first align the mating sleeve 12 with the insertion ring 221 on the insertion sleeve 22 and insert it. During insertion, align the insertion block 13 with the vertical section of slot 2211 and push it to slide the insertion block 13 and the mating sleeve 12 along the vertical section of slot 2211 until the mating sleeve 12 is fully inserted into the insertion ring 221. Then, rotate the upper sealing end 11 or the lower sealing end 21 to rotate the insertion block 13 into the horizontal section of slot 2211 to achieve circumferential locking. At this time, the upper sealing end 11 and the lower sealing end 21 fit tightly together, and the locking buckle 6 on the upper sealing end 11 and the lower sealing end 21 fits together. The locking device 5 is then engaged with the locking buckle 6 to complete the installation. Installation is convenient and a sealing connection can be completed without the need for external tools or additional fasteners.

[0021] Specifically, the locking device 5 includes an upper clamp 51 and a lower clamp 52. One end of the upper clamp 51 is hinged to one end of the lower clamp 52. The upper clamp 51 and the lower clamp 52 are symmetrically arranged and surround the outside of the buckle 6. The other end of the lower clamp 52 is provided with a locking hole 54. The other end of the upper clamp 51 is provided with a bearing 53 opposite to the locking hole 54. A clamping arm 531 is hinged to the bearing 53. The end of the clamping arm 531 is provided with an adjusting sleeve 532. The adjusting sleeve 532 has an adjustable fixing pin 533 inside. The fixing pin 533 cooperates with the locking hole 54 at the other end of the lower clamp 52 to achieve fastening and locking.

[0022] In this embodiment, specific reference is made. Figure 2 and Figure 3 as well as Figure 4 The fixing device consists of a pair of clamps that fasten the flange connection, ensuring a flange seal while providing additional mechanical strength to the connection. The upper clamp 51 and the lower clamp 52 are hinged and movably connected. The inner walls of the upper clamp 51 and the lower clamp 52 fit against the outer peripheral wall of the latch 6 and are matched in size. The clamping arm 531 has a C-shaped structure. One end of the clamping arm 531 is hinged to the shaft seat 53 and can rotate along the shaft seat 53. The adjusting sleeve 532 is fitted on the other end of the clamping arm 531. The fixing pin 533 inside the adjusting sleeve 532 is a bolt. Rotating the fixing pin 533 can push the fixing pin 533 to move along the inner wall of the adjusting sleeve 532.

[0023] When the upper end 11 and the lower end 21 are tightly fitted together, the locking buckle 6 will be engaged. At this time, the upper clamp 51 and the lower clamp 52 are closed, so that the adjusting sleeve 532 at the end of the clamp arm 531 is aligned with the locking hole 54. The fixing pin 533 is rotated and inserted into the locking hole 54 to lock the clamp.

[0024] Specifically, the end of the sleeve 22 is provided with a pre-compression component 3, which includes a contact ring 31 and a spring 32. The contact ring 31 is sleeved inside the sleeve 22, and one end of the spring 32 abuts against the contact ring 31, while the other end abuts against the bottom of the sleeve 22. When the sleeve is inserted into the sleeve 22, the contact ring 31 is compressed and pushes the spring 32 to generate elastic pre-compression.

[0025] In this embodiment, specific reference is made. Figure 4 and Figure 6 The pre-pressurization component 3 specifically provides initial axial pressure when the mating sleeve 12 and the insert sleeve 22 are connected, ensuring that the insert block 13 can stably stay at the end of the transverse section after being inserted into the slot 2211, providing assistance for the insert block 13 to turn into the transverse section, and preventing accidental dislodgement due to vibration or external force.

[0026] During the insertion of the mating sleeve 12 into the insert ring 221, the mating sleeve 12 continuously presses the contact ring 31, causing the spring 32 to compress and store energy. When the insert block 13 slides to the transverse section of the slot 2211, the upper sealing end 11 or the lower sealing end 21 is rotated, and the insert block 13 is then rotated into the transverse section of the slot 2211. The insert block 13 stays at the end of the transverse section, and the spring 32 releases its stored energy to push the contact ring 31 back. The contact ring 31 abuts against the mating sleeve 12, ensuring a seal between the flange connections.

[0027] Specifically, the inner peripheral wall of the mating sleeve 12 is provided with a first sealing ring 7, which is in close contact with the inner peripheral wall of the insert sleeve 22, and the outer peripheral wall of the mating sleeve 12 is provided with a second sealing ring 8, which is in close contact with the outer peripheral wall of the insert sleeve 22.

[0028] In this embodiment, specific reference is made. Figure 6 The first sealing ring 7 and the second sealing ring 8 are respectively embedded on the inner and outer side walls of the mating sleeve 12 and the insert sleeve 22, and the first sealing ring 7 and the second sealing ring 8 are used to form a double sealing structure.

[0029] Specifically, the upper sealing end 11 and the lower sealing end 21 are provided with a plurality of reserved holes 4, and the reserved holes 4 are equipped with positioning pins 41.

[0030] In this embodiment, multiple pre-drilled holes 4 are evenly distributed circumferentially on the upper sealing end 11 and the lower sealing end 21. The pre-drilled holes 4 are used to install positioning pins 41. After the pre-drilled holes 4 on the upper sealing end 11 and the pre-drilled holes 4 on the lower sealing end 21 are aligned, the positioning pins 41 are inserted to achieve precise positioning and fixation of the upper and lower sealing ends 21. The positioning pins 41 are specifically bolts.

[0031] Specifically, the mating sleeve 12 and the insert sleeve 22 are coaxially inserted. The mating sleeve 12 has an inclined end face at one end inside the first flange 1, and the insert sleeve 22 has an inclined end face at one end inside the second flange 2.

[0032] In this embodiment, specific reference is made. Figure 6 The inclined end faces of the connecting sleeve 12 and the insert sleeve 22 effectively guide the internal fluid, reduce the fluid resistance at the connection, improve the medium flow efficiency, and reduce pressure loss.

[0033] The principle of this utility model is as follows: During installation, first align the mating sleeve 12 with the insert ring 221 on the insert sleeve 22 and insert it. Simultaneously, align the insert block 13 with the vertical section of the slot 2211. Push the insert block 13 and mating sleeve 12 into the vertical section of the slot 2211 until the mating sleeve 12 is fully inserted into the insert ring 221. The mating sleeve 12 continuously penetrates and presses against the contact ring 31, causing the spring 32 in the pre-compression component 3 to compress and store energy. At this time, rotate the upper sealing end 11 or the lower sealing end 21, and the insert block 13 will rotate into the horizontal section of the slot 2211. When the spring 32 releases its stored energy at the end of the transverse section, it pushes the contact ring 31 back. The contact ring 31 abuts against the mating sleeve 12 to ensure the seal between the flanges. At this time, the reserved hole 4 on the upper sealing end 11 is aligned with the reserved hole 4 on the lower sealing end 21. The positioning pin 41 is inserted to complete the locking. The upper sealing end 11 and the lower sealing end 21 are tightly fitted together, and the locking buckle 6 is also fitted together. At this time, the upper clamp 51 and the lower clamp 52 are closed, so that the adjusting sleeve 532 at the end of the clamp arm 531 is aligned with the locking hole 54. The fixing pin 533 is rotated and inserted into the locking hole 54 to lock the clamp.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A lightweight flange with good airtightness, comprising a first flange (1) and a second flange (2), wherein the first flange (1) and the second flange (2) are coaxial and arranged opposite to each other, characterized in that: The first flange (1) has an upper sealing end (11) at its end, and the second flange (2) has a lower sealing end (21) at its end. The upper sealing end (11) has a mating sleeve (12) inside it, and the outer wall of the mating sleeve (12) has at least one insert (13). The lower sealing end (21) has a built-in insert (22), and the insert (22) has a plug ring (221) that matches the docking sleeve (12). The peripheral wall of the plug ring (221) has a slot (2211) that matches the plug block (13). The outer peripheral walls of the upper sealing end (11) and the lower sealing end (21) are both provided with a buckle (6). The buckle (6) is fitted with a locking device (5). The docking sleeve (12) is inserted into the insert (22), and the plug block (13) is inserted along the slot (2211) to achieve circumferential positioning.

2. The lightweight flange with good airtightness according to claim 1, characterized in that: The locking device (5) includes an upper clamp (51) and a lower clamp (52). One end of the upper clamp (51) is hinged to one end of the lower clamp (52). The upper clamp (51) and the lower clamp (52) are symmetrically arranged and surround the outside of the buckle (6). The other end of the lower clamp (52) is provided with a lock hole (54). The other end of the upper clamp (51) is provided with a bearing (53) opposite to the lock hole (54). A clamping arm (531) is hinged on the bearing (53). An adjusting sleeve (532) is provided at the end of the clamping arm (531). An adjustable fixing pin (533) is built into the adjusting sleeve (532). The fixing pin (533) cooperates with the lock hole (54) at the other end of the lower clamp (52) to achieve fastening and locking.

3. The lightweight flange with good airtightness according to claim 2, characterized in that: The end of the sleeve (22) is provided with a pre-compression component (3). The pre-compression component (3) includes a contact ring (31) and a spring (32). The contact ring (31) is sleeved inside the sleeve (22). One end of the spring (32) abuts against the contact ring (31), and the other end abuts against the bottom of the sleeve (22). When the sleeve is inserted into the sleeve (22), the contact ring (31) is compressed and pushes the spring (32) to generate elastic pre-compression.

4. A lightweight flange with good airtightness according to claim 3, characterized in that: The inner peripheral wall of the docking sleeve (12) is provided with a first sealing ring (7), which is in close contact with the inner peripheral wall of the insert sleeve (22). The outer peripheral wall of the docking sleeve (12) is provided with a second sealing ring (8), which is in close contact with the outer peripheral wall of the insert sleeve (22).

5. A lightweight flange with good airtightness according to claim 1, characterized in that: The first flange (1) is integrally formed with the upper sealing end (11), and the second flange (2) is integrally formed with the lower sealing end (21). The upper sealing end (11) and the lower sealing end (21) are provided with a plurality of reserved holes (4), and the reserved holes (4) are equipped with positioning pins (41).

6. The lightweight flange with good airtightness according to claim 1, characterized in that: The mating sleeve (12) and the insert sleeve (22) are coaxially inserted. The mating sleeve (12) is located inside the first flange (1) with one end being an inclined end face, and the insert sleeve (22) is located inside the second flange (2) with one end being an inclined end face.

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