Pipeline joint structure

Abstract

A pipeline connector structure comprises a connector body and a connector shell detachably connected with the two ends of the connector body, the connector shell is formed by connecting a plurality of sub-shells in a surrounding mode, and each sub-shell comprises a large-diameter connecting face, a small-diameter connecting face and an inclined connecting face connected with the large-diameter connecting face and the small-diameter connecting face, the inner wall of the inclined connecting face is smoothly connected with the inner wall of the large-diameter connecting face, the large-diameter connecting face is connected with the connector body, and the small-diameter connecting face is fixed to a pipeline to be connected. According to the utility model, the joint shell formed by splicing a plurality of sub-shells is adopted, and can be directly mounted in the middle section of a laid pipeline without cutting off the pipeline, so that the maintenance and reconnection efficiency is greatly improved; the stepped reducing structure is suitable for various pipe diameter combinations, and spare part types and inventory pressure are reduced. Through radial and axial multi-stage sealing defensive lines and in cooperation with the V-shaped elastic sealing rings, abrasion can be compensated, self-tightening and sealing enhancement can be achieved, the self-adaption to pipeline micro eccentricity can be achieved, and the anti-leakage capacity is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline technical field especially relates to a pipeline joint structure. BACKGROUND

[0002] Plastic pipeline is widely used in building water supply and drainage, municipal engineering and other fields due to corrosion resistance, low cost, convenient installation and other advantages. But the existing pipeline connection technology has significant limitations: the traditional joint is mostly designed with fixed size, and a single set can only adapt to a specific pipe diameter, so the joint type needs to be frequently replaced in the face of pipeline diversion, caliber upgrading and other scenes, resulting in high spare parts inventory pressure and low construction efficiency.

[0003] Insufficient sealing performance is another core pain point. The conventional joint mostly adopts a single sealing ring structure, which is prone to sealing failure when the pipeline expands and contracts due to temperature changes; and the sealing ring compression decreases after being disassembled several times, increasing the risk of leakage.

[0004] In addition, the existing integrated variable-diameter joint can realize the transition of a certain range of pipe diameters, but has inherent defects: first, the integrated shell cannot be disassembled, and the pipeline needs to be inserted from the end during installation, which is destructive when repairing or connecting in the middle section of the laid pipeline; second, the requirement for the coaxiality of the pipeline is strict, and eccentric installation is easily caused by foundation settlement, pipeline self-weight deviation and other factors during on-site construction, which further causes local stress concentration and shortens the service life of the joint; third, the sealing element and the shell are integrally formed, and the joint needs to be replaced in its entirety once the sealing fails, resulting in high maintenance cost.

[0005] With the acceleration of urbanization, the flexibility and durability of the pipeline system are increasingly prominent. The market urgently needs a connection scheme that can adapt to multiple pipe diameters, be quickly disassembled and assembled, and have high sealing reliability. INVENTION CONTENTS

[0006] The utility model aims at providing a pipeline joint structure to improve the flexibility, sealing performance and maintainability of pipeline connection.

[0007] To achieve the above-mentioned purpose, the utility model provides a pipeline joint structure, which comprises a joint main body and a joint shell detachably connected to both ends of the joint main body, the joint shell is connected by surrounding a plurality of split shells,

[0008] The split shell comprises large-diameter connecting surfaces and small-diameter connecting surfaces arranged in parallel from top to bottom, and inclined connecting surfaces connected to the two surfaces,

[0009] The inner wall of the large-diameter connecting surface is provided with a first sealing groove, and the outer wall of one end of the joint main body is provided with a first sealing ring corresponding to the first sealing groove, the first sealing groove and the first sealing ring are sealingly inserted,

[0010] The inner wall of the oblique connecting surface is smoothly connected with the inner wall of the large-diameter connecting surface,

[0011] The inner wall of the small-diameter connecting surface is provided with a buffer groove, and the small-diameter connecting surface is connected with a pipeline.

[0012] Preferably, the inner wall of the large-diameter connecting surface is further provided with a second sealing groove, the second sealing groove is arranged in parallel with the first sealing groove and is arranged on the side close to the oblique connecting surface, the outer wall of one end of the joint body is further provided with a second sealing ring corresponding to the second sealing groove, and an elastic sealing ring is clamped between the second sealing ring and the second sealing groove.

[0013] Preferably, the second sealing ring is arranged in parallel with two, the elastic sealing ring comprises a V-shaped block and side wings arranged on both sides of the V-shaped block, the V-shaped block is between the two second sealing rings, and the side wings are between the second sealing ring and the second sealing groove.

[0014] Preferably, the side of the oblique connecting surface connected with the joint body is provided with a third sealing convex ring, the joint body is provided with an end face convex ring corresponding to the third sealing convex ring, and the end face convex ring abuts against the third sealing convex ring.

[0015] Preferably, the outer side of the split shell is further provided with a connecting guard plate, the connecting guard plate penetrates through the large-diameter connecting surface, the oblique connecting surface and the small-diameter connecting surface, and the connecting guard plate is provided with a connecting hole.

[0016] Preferably, the outer wall of the oblique connecting surface is provided with a plurality of reinforcing ribs.

[0017] Preferably, the cross section of the buffer groove is isosceles trapezoidal.

[0018] Preferably, the first sealing ring is provided with a guide groove, the first sealing groove is provided with a guide block corresponding to the guide groove, and the guide block is inserted into the guide groove.

[0019] The utility model discloses the beneficial effects of:

[0020] 1. The joint shell of the utility model adopts the design of multi-piece split shell splicing, can be directly installed in the middle section of the pipeline that has been laid, does not need to cut off the pipeline, avoids destructive construction, greatly improves the maintenance and modification efficiency, and realizes single joint adaptation to various pipe diameter combinations through the cooperation of the large-diameter connecting surface and the main body and the small-diameter connecting surface connected with the pipeline, reduces the type and inventory pressure of spare parts.

[0021] 2.The utility model discloses a "radial + axial" multistage sealing defense line is constructed, and the basic radial seal cooperates double radial seal and axial end face seal, and the anti-leakage capacity and pressure fluctuation resistance are improved obviously;V type elastic sealing ring compensates abrasion through deformation, and the sealing is enhanced by self-tightening effect, and the trace eccentricity of pipeline can be self-adapted, and the failure caused by installation deviation is avoided.

[0022] 3.The utility model discloses the shell body is fixed rigidly through the connection guard board, and the reinforcing rib strengthens the strength of transition area, cooperates the buffer groove and absorbs thermal expansion and contraction and settlement displacement, reduces stress concentration, prolongs life, and the sealing element and the shell are set apart, only need to replace the sealing element after failure, do not need to replace the connector as a whole, and maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below.

[0024] Figure 1 It is the structural schematic diagram of the utility model.

[0025] Figure 2 It is the explosion schematic diagram of the utility model.

[0026] Figure 3 It is the cross section schematic diagram of the utility model.

[0027] Figure 4 It is Figure 3 The enlarged view of A in the figure.

[0028] Figure 5 It is the structural schematic diagram of the shell body of the utility model.

[0029] Figure 6 It is the connection schematic diagram of the guide groove and the guide block of the utility model.

[0030] In the figure: 1 connector main body;1a first sealing ring;1b second sealing ring;1c end face convex ring;1d guide groove;2 shell body;2a large diameter connecting surface;2b small diameter connecting surface;2c inclined connecting surface;2d first sealing groove;2e second sealing groove;2f buffer groove;2g third sealing convex ring;2h guide block;3 elastic sealing ring;3a V type block;3b wing;4 connection guard board;4a connecting hole;5 reinforcing rib. DETAILED DESCRIPTION

[0031] The embodiments of the utility model will be described in detail below, and the examples of the embodiments are shown in the drawings, and the embodiments described below by referring to the drawings are exemplary, and are intended to explain the utility model, and can not be understood as the limitation of the utility model.

[0032] The utility model discloses a pipeline joint structure, solve the single size of existing pipeline joint, installation is invariable, and the technical problem of poor sealing effect.

[0033] As Figure 1 And Figure 2 The pipeline joint structure of the embodiment includes a joint body 1 and a joint shell formed by surrounding and splicing a plurality of split shells 2 (four surrounding structures are shown in the figure). The split shell 2 forms a complete shell by surrounding and splicing, so that the pipeline does not need to be inserted from the end during installation. When facing the middle section of the laid pipeline, the split shell can be directly buckled from both sides of the pipeline, and then fixed through the connecting structure, completely avoiding the destructive construction of the traditional integrated joint "which must be cut off to install". The flexibility of this split design is more prominent and obvious in the scenes of municipal pipeline maintenance and old pipeline network reconstruction, which can reduce the construction period and reduce the risk of secondary damage to the pipeline.

[0034] As Figure 3 The split shell 2 is provided with an upper and lower parallel large-diameter connecting surface 2a, a small-diameter connecting surface 2b, and an inclined connecting surface 2c connecting the two. The large-diameter connecting surface 2a is used for cooperation with the joint body 1, the small-diameter connecting surface 2b is used for connecting the pipeline to be connected, and the inclined connecting surface 2c bears the function of pipe diameter transition. The inner wall of the inclined connecting surface 2c and the inner wall of the large-diameter connecting surface 2a are smoothly transitioned, which can reduce fluid resistance. When the medium flows from the large-diameter pipeline to the small-diameter pipeline, the smoothly transitioned inner wall can avoid the generation of turbulent flow and reduce local pressure loss. This stepped variable-diameter structure makes a single set of joint can adapt to various pipe diameter combinations, and can reduce more spare parts inventory types than the traditional fixed size joint.

[0035] Further, the outer wall of the joint body 1 at both ends is provided with a first sealing ring 1a and a second sealing ring 1b, and the inner wall of the large-diameter connecting surface 2a of the split shell 2 is correspondingly provided with a first sealing groove 2d and a second sealing groove 2e. When the split shell is buckled, the first sealing ring 1a and the first sealing groove 2d form the first radial seal, which adopts an interference fit design and can block most of the medium penetration.

[0036] Further, as Figure 4 The elastic sealing ring 3 adopts a V-shaped cross-section design, the V-shaped block 3a in the middle is located between two parallel second sealing rings 1b, and the two side wings 3b are respectively attached to the outer side of the second sealing ring 1b and the groove wall of the second sealing groove 2e. When the internal medium pressure of the pipeline rises, the V-shaped block 3a will be pushed to both sides by the pressure, forcing the side wings 3b to fit the sealing surface more tightly, and the greater the pressure, the stronger the sealing effect. At the same time, the elastic deformation ability of the V-shaped structure can compensate for the wear of the sealing element caused by repeated disassembly, prolonging the service life of the sealing element. Even if there is an eccentric error during installation, the flexible deformation of the side wings 3b can also adaptively fit, avoiding the problem of "eccentricity leading to failure" of traditional sealing elements.

[0037] In addition, the inner side of the inclined connecting surface 2c of the split shell 2 is further provided with a third sealing convex ring 2g, and the end surface of the joint body 1 is provided with a corresponding end surface convex ring 1c, which abuts against each other to form an axial seal when buckled. When the radial seal temporarily fails due to extreme working conditions, the axial seal can block the leakage of the medium as an emergency defense line, and a three-dimensional sealing network of "radial + axial" is constructed to improve the safety redundancy. In addition, the abutment of the convex ring can also limit the relative axial displacement of the joint body and the shell, reducing the wear of the sealing element due to vibration.

[0038] As shown in Figure 5 , the present application is provided with a connecting guard plate 4 outside the split shell. The connecting guard plate 4 is a long strip-shaped plate, which spans the large-diameter connecting surface 2a, the inclined connecting surface 2c and the small-diameter connecting surface 2b of the split shell, and locks the two split shells by bolts passing through the connecting holes 4a. The connecting guard plate 4 not only enhances the connection strength between the split shells, ensuring that the joint does not loosen under internal pressure or external vibration, but also provides a concentrated point of force, making installation and removal more convenient. In addition, a plurality of reinforcing ribs 5 are provided on the outer wall of the inclined connecting surface 2c (see Figure 2 、 Figure 5 ). The reinforcing ribs 5 extend along the generatrix direction of the inclined connecting surface, significantly improving the stiffness and anti-deformation ability of the transition area, preventing cracks caused by uneven stress.

[0039] Further, referring to Figure 3 , the buffer groove 2f of the inner wall of the small-diameter connecting surface 2b has an isosceles trapezoidal cross section. When the pipeline expands and contracts due to environmental temperature difference, or deflects radially due to foundation settlement, the buffer groove can provide sufficient space for movement, avoiding direct impact of the pipeline end on the sealing structure. The trapezoidal cross section design can also guide the pipeline to keep center alignment during expansion and contraction, reduce the eccentric wear of the sealing element, and prolong the service life of the joint in complex geological environment.

[0040] As shown in Figure 6 , the first sealing ring 1a is provided with a guide groove 1d, and the first sealing groove 2d is provided with a guide block 2h corresponding to the guide groove 1d. When the first sealing ring 1a is connected with the first sealing groove 2d, the guide block 2h is inserted into the guide groove 1d. Through the guide block 2h, the split shell 2 can be better and more conveniently fixed and installed, and can also prevent the split shell 2 from rotating axially. In addition, since the guide block 2h and the first sealing groove 2d are designed in one piece, they can also support the large-diameter connecting surface 2a when they are buried underground, prevent deformation, and improve the rigidity of the joint.

[0041] When installing the joint, two split housings 2 are first buckled on the joint body 1 and the pipes to be connected from both sides, so that the sealing ring of the joint body 1 is aligned with the sealing groove of the split housing, and the pipe end enters the buffer groove 2f. Then, the connecting guard plate 4 is aligned with the corresponding position on the split housing, and the two split housings are fastened by bolts passing through the connecting holes 4a. At this time, the sealing ring is tightly matched with the sealing groove, the elastic sealing ring and the convex ring, and reliable sealing is achieved. When disassembling, only the bolts on the connecting guard plate need to be loosened, and then the split housing can be removed from the pipe.

[0042] The above disclosure is only one or more preferred embodiments of the present application, and cannot limit the scope of the rights of the present application. Those skilled in the art can understand that the implementation of all or part of the above embodiments is still within the scope covered by the present application.

Claims

1. A pipe joint structure comprising a joint body and joint housings detachably connected to both ends of the joint body, characterized in that, The joint shell is connected by a plurality of split housings, The split housing comprises large-diameter connecting surfaces and small-diameter connecting surfaces arranged in parallel, and an inclined connecting surface connected with the two surfaces, The inner wall of the large-diameter connecting surface is provided with a first sealing groove, and the outer wall of one end of the joint body is provided with a first sealing ring corresponding to the first sealing groove, the first sealing groove and the first sealing ring are sealingly inserted, The inner wall of the inclined connecting surface is smoothly connected with the inner wall of the large-diameter connecting surface, The inner wall of the small-diameter connecting surface is provided with a buffer groove, and the small-diameter connecting surface is connected with the pipeline.

2. A pipe joint structure as claimed in claim 1, wherein The inner wall of the large-diameter connecting surface is further provided with a second sealing groove, the second sealing groove is arranged in parallel with the first sealing groove and is arranged on the side close to the inclined connecting surface, the outer wall of one end of the joint body is further provided with a second sealing ring corresponding to the second sealing groove, and an elastic sealing ring is clamped between the second sealing ring and the second sealing groove.

3. A pipe joint structure as claimed in claim 2, wherein The second sealing ring is arranged in parallel with two, the elastic sealing ring comprises a V-shaped block and side wings arranged on both sides of the V-shaped block, the V-shaped block is between the two second sealing rings, and the side wings are between the second sealing ring and the second sealing groove.

4. A pipe joint structure as defined in claim 2 wherein, The side of the inclined connecting surface connected with the joint body is provided with a third sealing convex ring, the joint body is provided with an end face convex ring corresponding to the third sealing convex ring, and the end face convex ring abuts against the third sealing convex ring.

5. A pipe joint structure as defined in claim 1 wherein, The split housing is further provided with a connecting guard plate, the connecting guard plate penetrates the large-diameter connecting surface, the inclined connecting surface and the small-diameter connecting surface, and the connecting guard plate is provided with a connecting hole.

6. A pipe joint structure as defined in claim 1 wherein, The outer wall of the inclined connecting surface is provided with a plurality of reinforcing ribs.

7. A pipe joint structure as defined in claim 1 wherein, The cross section of the buffer groove is isosceles trapezoidal.

8. A pipe joint structure as defined in claim 1 wherein, The first sealing ring is provided with a guide groove, the first sealing groove is provided with a guide block corresponding to the guide groove, and the guide block is inserted into the guide groove.

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