Combined expansion joint flange clamp
The design of the combined expansion joint flange clamp solves the problem of insufficient sealing at the leakage point of the expansion joint flange, achieving efficient sealing effect and stability, reducing leakage risk, and is suitable for pipeline emergency repair scenarios.
Patent Information
- Application Number
- CN202520610207.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-04-02
AI Technical Summary
Existing technologies are insufficient to effectively seal leaks at expansion joint flanges. Traditional clamps suffer from inadequate sealing surfaces due to insufficient ear plate structure, and injection technology suffers from uneven penetration, increasing the risk of leakage and the probability of secondary disasters.
A combined expansion joint flange clamp was designed, which adopts a split arc plate and sealant for double fixation, combined with the synergistic clamping design of the reinforcing plate and the hoop. The first arc groove and the second arc groove are precisely matched with the double-end screws of the expansion joint body to form a three-dimensional protection of static sealing and dynamic injection filling.
It achieves precise coverage of leak points, improves sealing reliability and stability, shortens leak plugging time, reduces the risk of leakage of flammable and explosive media, extends maintenance cycle, and improves the versatility and applicability of the fixture.
Smart Images
Figure CN223782364U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pipeline leak stoppage technical field, concretely relates to combined expansion joint flange fixture. BACKGROUND
[0002] To cope with climate change, the world is accelerating the transformation to low-carbon energy, and natural gas, as a clean fossil fuel, plays an important role in the transition period. China actively promotes the energy production and consumption revolution, and the consumption of natural gas continues to grow, accounting for an increasing proportion of primary energy consumption. To meet the growing demand for natural gas, China is vigorously promoting the construction of natural gas pipeline networks, gas storage facilities and other infrastructure, and the mileage of natural gas pipelines is growing rapidly. At present, the domestic pipeline is large in scale and complex in operation environment: China's natural gas pipeline network is large in scale, some pipelines have been in operation for a long time, and the geological conditions of the areas they pass through are complex, facing risks such as geological disasters and third-party damage.
[0003] Expansion joints, as important auxiliary equipment for pipelines, directly affect the overall safety of the pipeline system. Natural gas is flammable and explosive, and leakage may cause fires, explosions and other accidents, resulting in personnel injuries, property losses and environmental pollution. In recent years, natural gas pipeline expansion joint leakage accidents have occurred from time to time, causing varying degrees of economic losses and social impact. At present, the method for treating expansion joint flange leakage mainly uses injection type sealing technology, but due to the special structure of the expansion joint ear plate, there is almost no sealing surface required by the clamp at this position, so it is extremely difficult to successfully treat the leakage with conventional flange clamps. Therefore, it is particularly important and urgent to design a sealing clamp specifically for expansion joint flange leakage. SUMMARY
[0004] The main purpose of the utility model is to provide a combined expansion joint flange clamp which is convenient for sealing and plugging the connection between the pipeline and the expansion joint.
[0005] In order to achieve the above-mentioned purpose, the technical scheme provided by the utility model is:
[0006] The combined expansion joint flange clamp comprises two arc-shaped plates, the two arc-shaped plates are detachably fixedly connected and sealed to form a hoop sleeve in a circular ring shape, a first arc-shaped groove corresponding to a double-end screw rod on the expansion joint body is formed on the outer side of the hoop sleeve, a reinforcing plate corresponding to the first arc-shaped groove is detachably fixedly connected to one side of the hoop sleeve, a second arc-shaped groove concentric with the first arc-shaped groove is formed on the outer side of the reinforcing plate, the radii of the first arc-shaped groove and the second arc-shaped groove are equal, the ear plate of the expansion joint body is located between the reinforcing plate and the hoop sleeve, an injection pipe is fixed on each of the two arc-shaped plates, a second flange is fixedly connected with the pipeline, the second flange is fixedly and sealingly connected with the first flange of the expansion joint body by welding, the hoop sleeve is sealingly sleeved on the outer sides of the adjacent first flange and second flange, and the injection pipe is in communication with the space between the adjacent first flange and second flange.
[0007] Specific, the arc-shaped plate both ends are fixed with connecting plate, two arc-shaped plate connecting plate is fixed by bolt connection.
[0008] Specific, the two arc-shaped plate opposite end is sealed by sealing glue.
[0009] Specific, the reinforcing plate is arc-shaped, and the reinforcing plate is fixedly connected with the hoop through screws at two ends.
[0010] Specific, the ear plate of the expansion joint body is located between the two screws on the reinforcing plate.
[0011] Specific, the ear plate is fixed on the outer edge of the first flange, and the ear plate is close to the gravity center of the expansion joint body.
[0012] Specific, the number of ear plates on the two first flanges of the expansion joint body is equal and one-to-one correspondence, the corresponding two ear plates are connected through a double-end screw rod, and the double-end screw rod is threadedly connected with a nut at two ends.
[0013] Compared with the prior art, the utility model has the advantages that:
[0014] 1, through the first arc-shaped groove and the second arc-shaped groove and the double-end screw rod of the expansion joint body precise matching, solved the problem that the sealing surface is insufficient due to the ear plate structure of traditional clamp, realize the accurate covering of leakage point.
[0015] 2, the split type arc-shaped plate structure is fixed through bolt connection and sealing glue, supports quick disassembly, is applicable to pipeline emergency repair scene, greatly shortens the leakage stopping time.
[0016] 3, the double sealing mechanism of sealing glue coating and injection leakage stopping is combined, three-dimensional protection of static sealing and dynamic injection filling is formed, and sealing reliability is significantly improved.
[0017] 4, the hoop is fully covered to the flange connection, effectively isolates the leakage risk of flammable and explosive medium, and reduces the probability of secondary disasters such as fire and explosion.
[0018] 5, the detachable structure is convenient for later maintenance and inspection, and the plug can be supplemented through the injection pipe without damaging the clamp, thereby prolonging the maintenance cycle. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is a schematic view when the clamp seals and stops leakage to the first flange and the second flange.
[0020] Figure 2 Schematic view of the connection of the reinforcing plate and the sleeve.
[0021] Figure 3 Position relationship diagram of the first arc-shaped groove and the second arc-shaped groove.
[0022] Figure 4 Front view of the clamp sealing the first flange and the second flange.
[0023] Figure 5 Figure 4 A-A direction sectional view.
[0024] The names of the components in the drawings are as follows: 1, expansion joint body, 2, first flange, 3, ear plate, 4, double-end screw, 5, nut, 6, pipeline, 7, second flange, 8, arc-shaped plate, 9, connecting plate, 10, bolt, 11, reinforcing plate, 12, screw, 13, filling pipe, 14, first arc-shaped groove, 15, second arc-shaped groove. DETAILED DESCRIPTION
[0025] 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, rather than all the embodiments.
[0026] The expansion joint body 1 is commonly used for the connection of two pipelines 6 and is prior art. The expansion joint body 1 comprises two first flanges 2, the two first flanges 2 are fixedly connected through an expansion pipe, an ear plate 3 is fixed on the outer edge of the first flange 2, and the ear plate 3 is close to the center of gravity of the expansion joint body 1. The number of the ear plates 3 on the two first flanges 2 is equal and one-to-one corresponding, the corresponding two ear plates 3 are connected through a double-end screw 4, and the double-end screw 4 is threadedly connected with a nut 5 at both ends.
[0027] The second flange 7 fixed on the pipeline 6 is welded and fixedly connected with the first flange 2 of the expansion joint body 1.
[0028] Embodiment one: referring to Figures 1-5 As shown in the figure, the combined expansion joint flange clamp comprises two arc-shaped plates 8, and the two arc-shaped plates 8 are detachably fixedly connected and form a hoop-shaped sleeve.
[0029] The connecting plates 9 of the two arc-shaped plates 8 are fixedly connected through a bolt 10, and the opposite end portions of the two arc-shaped plates 8 are sealedly connected through sealing glue.
[0030] A first arc-shaped groove 14 corresponding to the double-end screw 4 on the expansion joint body 1 is formed in the outer side of the hoop-shaped sleeve, a reinforcing plate 11 corresponding to the first arc-shaped groove 14 is detachably fixedly connected to one side of the hoop-shaped sleeve, and the ear plate 3 of the expansion joint body 1 is located between the reinforcing plate 11 and the hoop-shaped sleeve.
[0031] The reinforcing plate 11 is arc-shaped, and its two ends are fixedly connected to the hoop by screws 12. The lug 3 of the expansion joint body 1 is located between two screws 12 on the reinforcing plate 11.
[0032] The second flange 7 is fixedly connected to the pipe 6, and the second flange 7 is fixedly and sealingly connected to the first flange 2 of the expansion joint body 1. A filling pipe 13 is fixed to each of the two arc-shaped plates 8. After the clamp seal is fitted onto the outside of the adjacent first flange 2 and second flange 7, the space between the filling pipe 13 and the adjacent first flange 2 and second flange 7 is connected.
[0033] When there is a leak between the first flange 2 and the second flange 7, remove the nut 5 on the double-ended screw 4 near the leak.
[0034] Clean the outer surfaces of the first flange 2 and the second flange 7, and apply sealant to the outer surfaces of the first flange 2 and the second flange 7.
[0035] The two arc-shaped plates 8 are assembled on the outer sides of the first flange 2 and the second flange 7 to form a clamp, and the double-ended screw 4 is positioned in the first arc-shaped groove 14. The clamp is sealed to the outer edges of the first flange 2 and the second flange 7 with sealant. At this time, the filling pipe 13 is in the open state.
[0036] The reinforcing plate 11 is fixedly connected to the hoop by screws 12. The hoop and the reinforcing plate 11 clamp and fix the ear plate 3 to prevent the hoop from shifting, which further improves the stability of the hoop.
[0037] After the sealant dries, the clamp is fixedly and sealed to the first flange 2 and the second flange 7.
[0038] Then, a sealant is injected between the first flange 2 and the second flange 7 through the injection pipe 13, and then the injection pipe 13 is sealed. After the sealant dries, it can seal the leaks at the connection between the first flange 2 and the second flange 7.
[0039] Example 2: Based on Example 1, referring to... Figures 3-5 As shown, a second arc-shaped groove 15 concentric with the first arc-shaped groove 14 is provided on the outer side of the reinforcing plate 11, and the radii of the first arc-shaped groove 14 and the second arc-shaped groove 15 are equal.
[0040] By setting a second arc-shaped groove 15 on the reinforcing plate 11, the double-ended screw 4 cooperates with the second arc-shaped groove 15 to facilitate the positioning of the reinforcing plate 11 and facilitate the connection between the reinforcing plate 11 and the hoop.
[0041] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A combined expansion joint flange clamp, comprising two arc-shaped plates (8) which are detachably fixedly connected in a sealed manner and form a hoop, characterized in that The hoop sleeve is provided with a first arc-shaped slot (14) corresponding to the double-end screw rod (4) on the expansion joint body (1) on the outside, and a reinforcing plate (11) corresponding to the first arc-shaped slot (14) is detachably fixedly connected to one side of the hoop sleeve, the reinforcing plate (11) is provided with a second arc-shaped slot (15) concentric with the first arc-shaped slot (14) on the outside, the radii of the first arc-shaped slot (14) and the second arc-shaped slot (15) are equal, the lug plate (3) of the expansion joint body (1) is located between the reinforcing plate (11) and the hoop sleeve, the two arc-shaped plates (8) are both fixed with a filling pipe (13), the second flange (7) is fixedly connected with the pipeline (6), the second flange (7) is fixedly and sealingly connected with the first flange (2) of the expansion joint body (1) by welding, the hoop sleeve sealing sleeve is arranged outside the adjacent first flange (2) and the second flange (7), and the filling pipe (13) is in communication with the space between the adjacent first flange (2) and the second flange (7).
2. The combined expansion joint flange clamp of claim 1, wherein, The arc-shaped plates (8) are both fixed with a connecting plate (9) at the two ends, and the connecting plates (9) of the two arc-shaped plates (8) are fixedly connected by bolts (10).
3. The combined expansion joint flange clamp of claim 1, wherein, The opposite ends of the two arc-shaped plates (8) are sealingly connected by sealing glue.
4. The combined expansion joint flange clamp of claim 1, wherein, The reinforcing plate (11) is arc-shaped, and the two ends of the reinforcing plate (11) are fixedly connected with the hoop sleeve by screws (12).
5. The combined expansion joint flange clamp of claim 4, wherein, The lug plate (3) of the expansion joint body (1) is located between the two screws (12) on the reinforcing plate (11).
6. The combined expansion joint flange clamp of claim 1, wherein, The lug plate (3) is fixed on the outer edge of the first flange (2), and the lug plate (3) is close to the center of gravity of the expansion joint body (1).
7. The combined expansion joint flange clamp of claim 1, wherein, The number of lug plates (3) on the two first flanges (2) of the expansion joint body (1) is equal and one-to-one corresponding, and the corresponding two lug plates (3) are connected by a double-end screw rod (4), and the double-end screw rod (4) is threadedly connected with a nut (5) at both ends.