Metal pipe fitting connecting structure
By introducing a compression deformation sealing method of ring-pressed convex ring and ring-pressed flared opening into the metal pipe fitting connection structure, the problem of insufficient axial force in thin-walled metal pipe fitting connections is solved, the pressure-bearing capacity and seismic performance of the pipeline system are improved, and the construction steps are simplified.
Patent Information
- Application Number
- CN202520135588.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-21
AI Technical Summary
The existing ring-press and clamp-press connection methods for thin-walled metal pipe fittings are insufficient in axial stress strength, pipeline system pressure bearing capacity and seismic resistance. Especially when installed vertically, they rely on pipe clamps for fixation, which is inconvenient for construction.
The metal pipe fitting connection structure includes a compression ring and a ring-compression flare. The ring-compression ring and the ring-compression flare work together to achieve a seal through compression deformation and enhance axial strength. The ring-compression sealing ring, which is thin in the middle and thick at both ends, improves the sealing effect.
It improves the axial strength of pipe fittings, enhances the pressure-bearing capacity and seismic resistance of the pipeline system, reduces the reliance on pipe clamps, and simplifies the construction process.
Smart Images
Figure CN223563672U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pipe fitting connection technical field especially relates to metal pipe fitting connection structure. BACKGROUND
[0002] Ring pressure connection and clamping pressure connection are two common non-welding connection methods when installing thin-walled metal pipe fittings, which have the advantage of convenient installation.
[0003] However, the thin-walled metal pipe fitting in the prior art adopts ring pressure and clamping pressure connection method, which solves the installation and sealing problems, but the axial stress strength, the pipeline system pressure bearing capacity and the anti-seismic effect are general. For example, when installing vertically, affected by the gravity of the pipe fitting, to ensure that the pipe fitting will not be disconnected from the connection, the pipe fitting often needs to be fixed on the wall body by using a pipe clamp, but it is not convenient for construction for the pipe fitting far away from the wall body, therefore, we propose a new type of metal pipe fitting connection structure for improving the axial structural strength of the pipe fitting connection and achieving the effect of improving the pipeline system pressure bearing capacity and enhancing the anti-seismic effect. UTILITY MODEL CONTENTS
[0004] The utility model discloses a metal pipe fitting connection structure which solves the problem of low axial stress structural strength when using clamping pressure and ring pressure connection of the thin-walled metal pipe fitting in the prior art.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] The metal pipe fitting connection structure comprises a clamping pressure convex ring located in the middle of a first pipe fitting and a ring pressure flared mouth located at the end of the first pipe fitting, and further comprises a ring pressure convex ring located on a second pipe fitting, wherein the ring pressure convex ring corresponds to the ring pressure flared mouth.
[0007] Further, the outer circumferential surface of the ring pressure convex ring is an outwardly convex arc surface structure.
[0008] Further, the inner circumferential surface of the ring pressure convex ring is an outwardly concave arc surface structure.
[0009] Further, the ring pressure convex ring and the second pipe fitting are an integral molding structure, and the outer circumferential surface of the ring pressure convex ring and the outer wall of the second pipe fitting are smoothly connected.
[0010] Further, it further comprises a ring pressure sealing ring installed on the surface of the ring pressure convex ring.
[0011] Further, the ring pressure sealing ring is a sealing ring with thin middle and thick ends.
[0012] Further, the ring pressure sealing ring comprises a thin-walled sealing ring located in the middle and O-shaped sealing rings located at both ends.
[0013] Further, the inner circle diameter value of the O-shaped sealing ring is less than the outer diameter value of the second pipe fitting.
[0014] Further, the outer circle diameter value of the O-shaped sealing ring is less than the outer circle diameter value of the ring pressure convex ring.
[0015] Compared with the prior art, the metal pipe fitting connecting structure has the following beneficial effects:
[0016] The metal pipe fitting connecting structure of the utility model, when in use, inserts the end part of the second pipe fitting into the inside of the clamping pressure convex ring and the ring pressure flaring on the first pipe fitting, makes the ring pressure convex ring abut against the ring pressure flaring, then uses the equipment to extrude the clamping pressure crimping point and the ring pressure flaring respectively, makes it deform, the clamping pressure crimping point is hexagonal form, reaches the sealing effect through the built-in O-shaped sealing ring and also guarantees the stability of the pipeline, the ring pressure makes the ring pressure flaring wrap outside the ring pressure convex ring, makes the ring pressure convex ring clamp the ring pressure flaring in the axial direction of the first pipe fitting and the second pipe fitting, compared with the prior art, effectively increases the axial stress structure strength of the first pipe fitting and the second pipe fitting in the ring pressure connecting part, further enhances the pressure-bearing capacity and the anti-seismic effect of the pipeline system.
[0017] Other advantages, objects, and features of the utility model will be set forth in part in the specification which follows, and in part will become apparent to those skilled in the art upon examination of the following specification and drawings; and will, where appropriate, be learned from practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is the whole structure perspective schematic view of the utility model;
[0019] Figure 2 It is the whole structure main view schematic view of the utility model;
[0020] Figure 3 It is the second pipeline main view direction sectional view schematic view of the utility model;
[0021] Figure 4 It is the Figure 3 It is the structure enlarged schematic view of A part of the utility model;
[0022] Figure 5 It is the ring pressure sealing ring main view direction sectional view schematic view of the utility model;
[0023] Figure 6 It is the ring pressure convex ring structure schematic view of the utility model;
[0024] Figure 7 It is the ring pressure convex ring main view direction sectional view schematic view of the utility model.
[0025] In the drawing:
[0026] 1, first pipe; 2, card pressure convex ring; 3, ring pressure flared; 4, second pipe; 5, ring pressure sealing ring; 501, thin-walled sealing ring; 502, O-shaped sealing ring; 6, ring pressure convex ring. DETAILED DESCRIPTION
[0027] 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.
[0028] Referring to Figures 1-7 , the metal pipe connecting structure comprises a card pressure convex ring 2 located in the middle of the first pipe 1 and a ring pressure flared 3 located at the end of the first pipe 1. The first pipe 1 and the second pipe 4 are both thin-walled metal pipes. The card pressure convex ring 2 is internally provided with a matching O-shaped sealing ring. The card pressure convex ring 2 is located on the side of the first pipe 1 close to the ring pressure flared 3. The card pressure convex ring 2 and the corresponding O-shaped sealing ring both adopt the card pressure crimping technology in the prior art, which will not be described here.
[0029] The structure further comprises a ring pressure convex ring 6 located on the second pipe 4. The ring pressure convex ring 6 corresponds to the ring pressure flared 3. Here, the correspondence means that, after the end of the second pipe 4 is inserted into the predetermined installation position inside the card pressure convex ring 2 and the ring pressure flared 3, the ring pressure convex ring 6 is located at the middle position inside the ring pressure flared 3. Then, when the ring pressure flared 3 is compressed by using a ring pressure device, the ring pressure flared 3 can be wrapped outside the ring pressure convex ring 6.
[0030] Due to the existing centralized ring pressure connection position, only the ring pressure flared directly wraps and compresses the predetermined position of the ordinary pipe, and the surface of the ordinary pipe is often flat, so that the axial constraint of the ring pressure flared is lacking, and the friction force generated by compression is mainly relied on to provide a certain stress intensity. After the ring pressure convex ring 6 is added here, the axial structural strength can be effectively provided, the ring pressure flared 3 is clamped by the ring pressure convex ring 6, and thus the stress intensity is improved.
[0031] After the stress intensity is improved, the dependence of the pipe on the pipe clamp in the vertical installation environment can be reduced, and the pressure-bearing capacity of the pipeline system and the anti-seismic effect are also improved.
[0032] The outer circumferential surface of the ring pressure convex ring 6 is an outwardly convex arc surface structure, so that the outer circumferential surface of the ring pressure convex ring 6 is a convex surface structure with low ends and high middle. First, it is easy to install the sealing ring, and second, the shape is adapted to the ring structure formed by the ring pressure device extruding the ring pressure flared, so that the existing ring pressure device can be directly used for forming.
[0033] The inner circumferential surface of the ring pressure convex ring 6 is an arc surface structure outwardly concave. The outer concave inner circumferential surface and the outer convex outer circumferential surface of the ring pressure convex ring 6 are matched, so that the ring pressure convex ring 6 has a certain elasticity, matches the extrusion of the ring pressure flared mouth 3, and is more closely attached to the inner circumferential surface of the ring pressure flared mouth 3; and the ring pressure convex ring 6 can be directly machined from the side wall of the second pipe fitting.
[0034] The ring pressure convex ring 6 and the second pipe fitting 4 are an integrally formed structure, and the outer circumferential surface of the ring pressure convex ring 6 is smoothly and transitionally connected to the outer wall of the second pipe fitting 4. The smooth and transitional connection facilitates the ring pressure sealing ring 5 being sleeved on the ring pressure convex ring 6.
[0035] The structure further includes the ring pressure sealing ring 5 installed on the surface of the ring pressure convex ring 6, for improving the sealing effect between the ring pressure convex ring 6 and the ring pressure flared mouth 3.
[0036] The ring pressure sealing ring 5 is a sealing ring with thin middle and thick ends, so that when the ring pressure sealing ring 5 is extruded by the ring pressure flared mouth 3, the ring pressure sealing ring 5 is mainly sealed by the extrusion and filling of the thick parts on both sides of the sealing ring 5 inside the pipe fitting, avoiding the situation that the sealing effect is affected due to insufficient filling density of the middle part of the sealing ring.
[0037] The ring pressure sealing ring 5 includes a thin-wall sealing ring 501 in the middle and O-shaped sealing rings 502 at both ends. Specifically, the ring pressure sealing ring 5 is composed of two O-shaped sealing rings 502 and one thin-wall sealing ring 501, and the thin-wall sealing ring 501 and the O-shaped sealing rings 502 are also an integrally formed structure. The function is that the sealing effects among the one thin-wall sealing ring 501 and the two O-shaped sealing rings 502 are relatively independent. When the pipe fitting is deformed and the one thin-wall sealing ring 501 and the two O-shaped sealing rings 502 are extruded, the three are deformed by extrusion, and the three are extruded to each other. At the same time, the O-shaped sealing rings 502 on both sides fill the gaps on both sides of the ring pressure crimping place more densely to ensure the sealing effect.
[0038] The inner circle diameter value L1 of the O-shaped sealing ring 502 is slightly smaller than the outer diameter value of the second pipe fitting 4, so that when the ring pressure sealing ring is sleeved on the second pipe fitting 4, it is slightly taut, can be closely attached to the outer wall surface of the second pipe fitting 4, and prevents the ring pressure sealing ring 5 from naturally slipping off.
[0039] The outer circle diameter value L2 of the O-shaped sealing ring 502 is smaller than the outer circle diameter value L3 of the ring pressure convex ring 6. As shown in the specific Figure 4 After the O-shaped sealing ring 502 is sleeved on the ring pressure convex ring 6, the O-shaped sealing ring 502 will not directly contact the inner wall of the ring pressure flared mouth 3, and the inner wall of the ring pressure flared mouth 3 directly presses on the outer wall of the thin-wall sealing ring 501, for extruding the ring pressure flared mouth 3, so that the inner wall of the ring pressure flared mouth 3 directly extrudes the thin-wall sealing ring 501.
[0040] When the ring pressure sealing ring 5 is sleeved on the ring pressure convex ring 6, the thin-wall sealing ring 501 is sleeved in the middle of the ring pressure convex ring 6, and the two O-shaped sealing rings 502 are located at the connection between the ring pressure convex ring 6 and the second pipe 4.
[0041] It should be noted that the structure can be located at both ends of the pipe, including straight pipes, elbow pipes and other types of pipes, in addition to being located at one end of the pipe, and the material of the ring pressure sealing ring 5 can be selected from silicone rubber, ethylene-propylene-diene rubber, chlorobutyl rubber, fluororubber and nitrile rubber according to different application fields.
[0042] Working principle: when in use, the ring pressure sealing ring 5 is sleeved on the ring pressure convex ring 6, so that the O-shaped sealing rings 502 are located on both sides of the ring pressure convex ring 6, the second pipe 4 is inserted into the first pipe 1, and the end of the second pipe 4 is tightly abutted against the inner wall of the first pipe 1.
[0043] Then, the clamping convex ring 2 and the second pipe 4 are tightly pressed by using a clamping tool, and the ring pressure flared mouth 3 and the ring pressure convex ring 6 are tightly pressed by using a ring pressure device, so that the ring pressure convex ring 6 can clamp the ring pressure flared mouth 3.
[0044] The above description is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.
[0045] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.
[0046] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.
Claims
1. A metal pipe fitting connection structure comprising a press-in collar (2) located in the middle of a first pipe fitting (1) and a ring press flange (3) located at the end of the first pipe fitting (1), characterized in that, Further comprising a ring pressing convex ring (6) on the second pipe (4), which corresponds to the ring pressing flange (3).
2. The metal pipe coupling structure according to claim 1, wherein The outer circumferential surface of the ring pressing convex ring (6) is an outward convex arc surface structure.
3. The metal pipe coupling structure according to claim 2, characterized by The inner circumferential surface of the ring pressing convex ring (6) is an outward concave arc surface structure.
4. The metal pipe coupling structure according to claim 3, characterized by The ring pressing convex ring (6) is an integral molding structure with the second pipe (4), and the outer circumferential surface of the ring pressing convex ring (6) and the outer wall of the second pipe (4) are smoothly connected.
5. The metal pipe coupling structure according to claim 4, wherein Further comprising a ring pressing sealing ring (5) installed on the surface of the ring pressing convex ring (6).
6. The metal pipe coupling structure according to claim 5, wherein The ring pressing sealing ring (5) is a sealing ring with thin middle and thick ends.
7. The metal pipe coupling structure according to claim 5, wherein The ring pressing sealing ring (5) comprises a thin-wall sealing ring (501) in the middle and O-shaped sealing rings (502) at both ends.
8. The metal pipe coupling structure according to claim 7, wherein The inner circle diameter value of the O-shaped sealing ring (502) is smaller than the outer diameter value of the second pipe (4).
9. The metal pipe coupling structure according to claim 7, wherein The outer circle diameter value of the O-shaped sealing ring (502) is smaller than the outer circle diameter value of the ring pressing convex ring (6).