Pipeline connecting structure
By adopting a clamp structure and a retaining ring design in the plug-in pipe connection structure, the problems of non-removable connection and poor sealing durability in the prior art are solved, and efficient sealing and pressure bearing performance are achieved.
Patent Information
- Application Number
- CN202411397883.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-02-14
AI Technical Summary
The existing plug-in pipe connection structure has the problem of non-detachment, which is not conducive to maintenance, and at the same time, the sealing durability is poor, making it difficult to meet the sealing requirements in high-pressure environments.
Using a clamp-type structure, the sealing ring is squeezed through the guide conical surface on the inner side of the clamp, so that the sealing ring wedges into the gap between the insertion sleeve and the pipe, and combines the design of the barrier ring A and barrier ring B to enhance the contact of the sealing ring. Pressure and pressure bearing capacity.
The removability of pipe connections is achieved, while improving sealing performance and pressure bearing performance, ensuring the stability and reliability of sealing in high-pressure environments.
Smart Images
Figure CN119435853A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of pipeline facilities, and in particular relates to a pipeline connection structure. Background Art
[0002] The socket-and-spigot pipe connection structure is a special form of pipe connection, and its core structure is the socket-and-spigot pipe fitting. When connecting, the end of the connected pipe is inserted into the inner side of the socket-and-spigot pipe fitting and fixed, so that the pipe and the socket-and-spigot pipe fitting can be connected.
[0003] In the prior art, the socket fittings and the connected pipes are usually connected by gluing. Although this connection method can ensure the sealing and pressure bearing capacity of the pipes, it has the problem of being non-detachable, which is not conducive to maintenance, and also has the problem of poor sealing durability.
[0004] To this end, the present invention provides a novel socket-and-spigot type pipe connection structure. Summary of the invention
[0005] The purpose of the present invention is to provide a pipe connection structure, which aims to improve the existing socket-type pipe connection structure, realize detachability, and have better sealing performance and pressure bearing performance.
[0006] The technical problem solved by the present invention is achieved by adopting the following technical solution: The present invention provides a pipeline connection structure, including a pipe and a socket pipe fitting, wherein the pipe is inserted inside the socket pipe fitting; Socket fittings, including socket sleeves, clamps and sealing rings; The pipe is inserted into the inner side of the socket and slidably cooperates with the inner wall of the socket, thereby achieving docking between the pipe and the socket; A sealing conical surface is processed on the inner side of the end of the socket sleeve, and a wedge-shaped structure is arranged on one side of the sealing ring, and the wedge-shaped structure wedges into the space between the sealing conical surface and the pipe, thereby sealing the gap between the socket sleeve and the pipe; A clamping portion is provided on the outer side of the end of the socket sleeve, the clamp surrounds the outer side of the sealing ring and the clamping portion, and two guide conical surfaces are processed on the inner side of the clamp, and the two guide conical surfaces are respectively slidably matched with the outer side of the sealing ring and the clamping portion. During the tightening process of the clamp, the sealing ring and the socket sleeve are approached to each other under the action of the two guide conical surfaces, forcing the sealing ring to further wedge between the sealing conical surface and the pipe, thereby increasing the contact pressure between the sealing ring and the socket sleeve and the pipe, so as to improve the sealing performance; A retaining ring A is arranged between the clamp and the pipe, and the retaining ring A is slidably matched with the pipe. One side of the retaining ring A is against the end face of the sealing ring, and the other side is axially limited by the clamp; when the sealing ring is subjected to pressure from inside the pipeline, the retaining ring A can prevent the sealing ring from being squeezed into the gap between the clamp and the pipe, thereby improving the pressure-bearing capacity of the sealing structure.
[0007] As a preferred solution, the outer side of the retaining ring A is also processed with a guiding conical surface, which slides with the guiding conical surface inside the clamp. During the tightening process of the clamp, the retaining ring A further presses the sealing ring under the action of the guiding conical surface.
[0008] As a preferred solution, a retaining ring B is further provided on the inner side of the clamp, and in the axial direction of the retaining ring B, the retaining ring B is clamped between the sealing ring and the socket sleeve, and in the radial direction of the retaining ring B, the retaining ring B is clamped between the clamp and the pipe; Radial cuts are evenly arranged on the circumferences on both sides of the inner and outer sides of the retaining ring B, which are arranged alternately inside and outside. The setting of the radial cuts allows the diameter of the retaining ring B to change under the action of force. During the tightening process of the clamp, the diameter of the retaining ring B becomes smaller due to the pressure of the clamp. During the process of the clamp compressing the sealing ring, the retaining ring B can continue to fit with the inner wall of the clamp, thereby preventing the sealing ring from being squeezed into the gap between the clamp and the socket sleeve.
[0009] As a preferred solution, a group of first elastic claws extend from the retaining ring A on one side facing the sealing ring, and the first elastic claws are evenly arranged along the circumference; The first elastic claw is inserted into the inside of the sealing ring, and the end of the first elastic claw is also a wedge-shaped structure; the wedge-shaped structure at the end of the first elastic claw is inside the wedge-shaped structure on the sealing ring; After the clamp is tightened, the first elastic claw and the wedge-shaped structure on the sealing ring are wedged into the gap between the socket and the pipe, increasing the contact pressure between the sealing ring and the pipe. After the contact pressure increases, the friction between the sealing ring and the pipe increases and is sufficient to lock the pipe, making it difficult for the pipe and the socket to separate.
[0010] As a preferred solution, the gap between two adjacent first elastic claws is filled with rubber material from the sealing ring.
[0011] As a preferred solution, an elastic steel sheet is provided between the clamp and the pipe, and the elastic steel sheet is inclined toward the direction of the socket. During use, when the pipe has a tendency to move away from the socket, the end of the elastic steel sheet can penetrate the outer wall of the pipe, thereby preventing the pipe from being pulled out.
[0012] As a preferred solution, a locking ring is provided on the inner side of the clamp, the locking ring is axially limited by the clamp, and the elastic steel sheet is fixed on the locking ring.
[0013] As a preferred solution, a clamping groove is provided on the inner side of the clamping hoop, and the locking ring is composed of two half rings, and the clamping ring composed of the two half rings is clamped in the clamping groove, so as to facilitate quick assembly.
[0014] As a preferred solution, dot-shaped protrusions are processed on the circumference of the inner side of the clamp. During the tightening process of the clamp, the dot-shaped protrusions abut against the outer wall of the pipe, thereby increasing the difficulty of relative movement between the pipe and the socket.
[0015] As a preferred solution, a group of second elastic claws extend from the other side of the retaining ring A opposite to the side where the sealing ring is located, and the second elastic claws are evenly arranged along the circumference, and the ends of the second elastic claws are also wedge-shaped structures; During the tightening process of the clamp, the action of the clamp on the retaining ring A is divided into two stages. In the first stage, the retaining ring A moves along the axial direction of the pipe under the action of the guiding conical surface, thereby further compressing the sealing ring. In the second stage, after the sealing ring is compressed by the clamp and the retaining ring A to the required degree of sealing, the inner surface of the clamp is pressed against the outer side of the second elastic claw during the process of continuing to tighten the clamp, so that the second elastic claw is pressed against the outer surface of the pipe, thereby fixing the pipe.
[0016] The present invention improves the existing socket-and-spigot pipe connection structure, producing the following effects: 1. The present invention adopts a clamp-type structure to achieve reliable sealing between the socket-type pipe fitting and the pipe: during the tightening process of the clamp, the two guiding conical surfaces on the inner side of the clamp squeeze the sealing ring, so that the sealing ring is wedged into the gap between the socket sleeve and the pipe, thereby achieving a very reliable seal. At the same time, the retaining ring A slides along the outer wall of the pipe under the action of the guiding conical surface and squeezes the sealing ring, thereby further squeezing the sealing ring and improving the sealing performance.
[0017] In addition, the friction between the sealing ring and the pipe, as well as the elastic steel sheet inside the clamp, can effectively prevent the pipe from sliding outward relative to the socket sleeve in the axial direction, thereby ensuring the pressure-bearing capacity of the connection between the pipe and the socket fitting.
[0018] 2. In practice, there is such a problem: due to structural limitations, even after the clamp is tightened, there will still be an obvious gap between the clamp and the pipe (otherwise it cannot be guaranteed that the sealing ring is fully compressed). When the pressure in the pipeline is too high, the pressure will squeeze the sealing ring into the gap, thereby causing the seal to fail. In order to solve this problem, the present invention provides retaining rings A on both sides of the sealing ring. The retaining ring A can block the gap between the clamp and the pipe (leaving only a very small matching gap), preventing the sealing ring from entering the gap, thereby effectively improving the pressure bearing capacity of the seal.
[0019] In addition, in the present invention, the retaining ring A is slidably matched with the inner wall of the clamp through the guide conical surface. During the tightening process of the clamp, the retaining ring A further compresses the sealing ring under the action of the guide conical surface, thereby further improving the pressure bearing capacity of the sealing part.
[0020] 3. The present invention provides a retaining ring B on the inner side of the clamp. When the clamp is tightened, the clamp presses the retaining ring B, forcing the inner and outer diameters of the retaining ring B to become smaller, thereby further squeezing the sealing ring and improving the pressure bearing capacity of the sealing part.
[0021] In addition, in order to reduce the inner and outer diameters of the retaining ring B, the present invention evenly arranges radial cuts that are alternately arranged inside and outside on the circumferences on both sides of the inner and outer sides of the retaining ring B. The setting of the radial cuts allows the diameter of the retaining ring B to change under the action of force. During the tightening process of the clamp, the diameter of the retaining ring B is compressed by the clamp and becomes smaller. During the process of the clamp compressing the sealing ring, the retaining ring B can continue to fit with the inner wall of the clamp, thereby preventing the sealing ring from being squeezed into the gap between the clamp and the socket sleeve.
[0022] 4. In the present invention, a group of first elastic claws extend from the retaining ring A on one side toward the sealing ring, and the wedge-shaped structure at the end of the first elastic claw is located inside the wedge-shaped structure on the sealing ring. When the retaining ring A is squeezed by the clamp, while the clamping ring A squeezes the sealing ring, the first elastic claws and the wedge-shaped structure on the sealing ring are wedged into the gap between the socket and the pipe together, thereby increasing the contact pressure between the sealing ring and the pipe. After the contact pressure increases, the friction between the sealing ring and the pipe increases and is sufficient to lock the pipe, thereby making it difficult for the pipe and the socket to separate, thereby improving the pressure-bearing capacity of the pipeline connection. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic structural diagram of the first embodiment of the present invention.
[0024] Figure 2 The clamp is Figure 1 Schematic diagram of the structure from the left perspective.
[0025] Figure 3 It is a schematic structural diagram of a second embodiment of the present invention.
[0026] Figure 4 It is a schematic diagram of the structure of retaining ring B.
[0027] Figure 5 It is a schematic structural diagram of a third embodiment of the present invention.
[0028] Figure 6 yes Figure 5 Schematic diagram of the structure of the middle retaining ring A.
[0029] Figure 7 yes Figure 6Cross-sectional view at point A.
[0030] Figure 8 yes Figure 5 A schematic structural diagram of another embodiment of the middle retaining ring A.
[0031] Fig. 9 It is a schematic structural diagram of a fourth embodiment of the present invention.
[0032] Fig.10 It is a schematic structural diagram of a fifth embodiment of the present invention.
[0033] Fig.11 It is a schematic structural diagram of a sixth embodiment of the present invention.
[0034] Fig.12 It is a schematic structural diagram of the seventh embodiment of the present invention.
[0035] Fig.13 yes Fig.12 Schematic diagram of the structure of the middle retaining ring A.
[0036] Fig.14 yes Fig.13 Left view of .
[0037] Fig.15 It is a schematic structural diagram of an eighth embodiment of the present invention.
[0038] In the figure, 1, clamp, 2, elastic steel sheet, 3, retaining ring A, 4, sealing ring, 5, clamping part, 6, pipe, 7, socket sleeve, 8, retaining ring B, 9, radial incision, 10, guide cone surface, 11, sealing cone surface, 12, first elastic claw, 13, locking ring, 14, dot-shaped protrusion, 15, second elastic claw. DETAILED DESCRIPTION
[0039] The present invention is further described below in conjunction with the accompanying drawings: First embodiment like Figure 1 As shown, this embodiment includes a pipe 6 and a socket pipe fitting, and the pipe 6 is inserted into the inner side of the socket pipe fitting. The above is a structure that already exists in the prior art and will not be repeated here.
[0040] like Figure 1 As shown, in this embodiment, the bell-and-spigot pipe fitting includes a bell-and-spigot sleeve 7, a clamp 1 and a sealing ring 4, wherein the bell-and-spigot sleeve 7 is used to connect with the pipe 6, the clamp 1 is used to connect the clamp 1 and the bell-and-spigot sleeve 7 to each other, and the sealing ring 4 is used to seal the gap between the pipe 6 and the bell-and-spigot sleeve 7.
[0041] like Figure 1As shown, the pipe 6 is inserted into the inner side of the socket 7 and slides with the inner wall of the socket 7, thereby achieving the butt joint between the pipe 6 and the socket 7. A sealing conical surface 11 is processed on the inner side of the end of the socket 7, and a wedge structure is provided on one side of the sealing ring 4. The wedge structure wedges into the space between the sealing conical surface 11 and the pipe 6, thereby sealing the gap between the socket 7 and the pipe 6.
[0042] like Figure 1 As shown, the outer side of the end of the socket sleeve 7 is provided with a clamping portion 5, the clamp 1 surrounds the outer side of the sealing ring 4 and the clamping portion 5, and the inner side of the clamp 1 is processed with two guide conical surfaces 10, which are respectively slidably matched with the outer sides of the sealing ring 4 and the clamping portion 5. During the tightening process of the clamp 1, the sealing ring 4 and the socket sleeve 7 are close to each other under the action of the two guide conical surfaces 10, forcing the sealing ring 4 to further wedge between the sealing conical surface 11 and the pipe 6, thereby increasing the contact pressure between the sealing ring 4 and the socket sleeve 7 and the pipe 6 to improve the sealing performance. At the same time, the retaining ring A3 slides along the outer wall of the pipe 6 under the action of the guide conical surface 10 and squeezes the sealing ring 4, thereby further squeezing the sealing ring 4 to improve the sealing performance. In addition, through the friction between the sealing ring 4 and the pipe 6, and the elastic steel sheet 2 inside the clamp 1, the pipe 6 can be effectively prevented from sliding outward relative to the socket sleeve 7 in the axial direction, thereby ensuring the pressure bearing capacity of the connection between the pipe 6 and the socket pipe fitting.
[0043] It should be noted that the clamp 1 is a commonly used fastener in the mechanical field and belongs to conventional technology, so it does not fall within the scope of protection required by the claims of the present invention. However, for ease of understanding, the structure of the clamp 1 used in this embodiment is given here. Figure 2 As shown, the structure of the clamp 1 used in this embodiment includes two half rings, which are connected into a ring shape by threaded fasteners, thereby surrounding the outside of the pipe 6 and the socket 7. In some embodiments, other types of clamps 1 with different fastening methods can be used.
[0044] In practice, there is such a problem: in order to ensure that the clamp 1 can fully clamp the sealing ring 4, after the clamp 1 is tightened, there must be an obvious gap between the clamp 1 and the pipe 6. When the pressure in the pipeline is too high, the pressure will squeeze the sealing ring 4 into the gap, thereby causing the seal to fail. Figure 1 As shown, in order to solve this problem, the present invention provides retaining rings A3 on both sides of the sealing ring 4, the retaining ring A3 is slidably matched with the pipe 6, one side of the retaining ring A3 is against the end face of the sealing ring 4, and the other side is axially limited by the clamp 1. When the sealing ring 4 is subjected to pressure from the inside of the pipeline, the retaining ring A3 can prevent the sealing ring 4 from being squeezed into the gap between the clamp 1 and the pipe 6, thereby improving the pressure-bearing capacity of the sealing structure.
[0045] like Figure 1 As shown, in this embodiment, a guide conical surface 10 is also processed on the outer side of the retaining ring A3, and the guide conical surface 10 is slidably matched with the guide conical surface 10 on the inner side of the clamp 1. During the tightening process of the clamp 1, the retaining ring A3 is further pressed against the sealing ring 4 under the action of the guide conical surface 10, thereby further enhancing the sealing effect.
[0046] Second embodiment like Figure 3 As shown, in this embodiment, a retaining ring B8 is further provided on the inner side of the clamp 1. In the axial direction of the retaining ring B8, the retaining ring B8 is clamped between the sealing ring 4 and the socket sleeve 7. In the radial direction of the retaining ring B8, the retaining ring B8 is clamped between the clamp 1 and the pipe 6.
[0047] like Figure 4 As shown, radial cutouts 9 arranged alternately inside and outside are evenly arranged on the circumference of the inner and outer sides of the retaining ring B8. The radial cutouts 9 are arranged so that the diameter of the retaining ring B8 can change under the action of force. In the process of the clamp 1 compressing the sealing ring 4, that is, in the process of tightening the clamp 1, the clamp 1 presses the retaining ring B8, forcing the inner and outer diameters of the retaining ring B8 to become smaller, thereby further squeezing the sealing ring 4 and improving the pressure bearing capacity of the seal. In addition, in the process of tightening the clamp 1, the retaining ring B8 can continue to fit with the inner wall of the clamp 1, thereby preventing the sealing ring 4 from being squeezed into the gap between the clamp 1 and the socket sleeve 7. It should be noted that the width of the radial cutout 9 is preferably controlled within 0.5 mm to prevent the rubber material from entering the radial cutout 9. At the same time, the more radial cutouts 9 there are, the larger the diameter variation range of the retaining ring B8 is. Therefore, the diameter variation range of the retaining ring B8 can be ensured to be large enough by increasing the number of radial cutouts 9.
[0048] Third embodiment like Figure 5 As shown, in this embodiment, a group of first elastic claws 12 extend from the side of the retaining ring A3 toward the sealing ring 4, and each first elastic claw 12 is evenly arranged along the circumference; the first elastic claws 12 are inserted into the inside of the sealing ring 4. In specific implementation, the first elastic claws 12 can be directly set inside the sealing ring 4 during the vulcanization process of the sealing ring 4, so that the retaining ring A3, the first elastic claws 12 and the sealing ring 4 become an inseparable whole. Of course, the sealing ring 4 and the retaining ring A3 with the first elastic claws 12 can also be made into a split structure, that is, a slot matching the shape of the first elastic claw 12 is set inside the sealing ring 4, and the first elastic claw 12 is inserted into the slot to achieve the assembly of the first elastic claw 12 and the sealing ring 4.
[0049] like Figure 6 and 7As shown, the end of the first elastic claw 12 is also a wedge-shaped structure; the wedge-shaped structure at the end of the first elastic claw 12 is inside the wedge-shaped structure on the sealing ring 4. When the retaining ring A3 is squeezed by the clamp 1, the clamp A squeezes the sealing ring 4. At the same time, the first elastic claw 12 and the wedge-shaped structure on the sealing ring 4 are wedged into the gap between the socket sleeve 7 and the pipe 6, thereby greatly increasing the contact pressure between the sealing ring 4 and the socket sleeve 7. After the contact pressure increases, on the one hand, the sealing performance of the sealing ring 4 can be further improved, and on the other hand, the friction between the sealing ring 4 and the pipe 6 can be greatly increased, and the friction is sufficient to lock the pipe 6 to prevent the pipe 6 from separating from the socket sleeve 7, thereby greatly increasing the pressure bearing capacity of the connection of the pipe 6.
[0050] like Figure 8 As shown, in some embodiments, the gap between two adjacent first elastic claws 12 is filled with rubber material from the sealing ring 4, so that the first elastic claws 12 are completely surrounded by the rubber material. When the first elastic claws 12 are deformed during the wedging process, the first elastic claws 12 squeeze the sealing ring 4, which can make the rubber at various parts of the sealing ring 4 linked, so that the force on the inner and outer sealing surfaces of the sealing ring 4 is more uniform, which is beneficial to further ensure the sealing effect.
[0051] Fourth embodiment like Fig. 9 As shown, an elastic steel sheet 2 is arranged between the clamp 1 and the pipe 6, and the elastic steel sheet 2 is inclined toward the direction of the socket 7. During use, when the pipe 6 has a tendency to move away from the socket 7, the end of the elastic steel sheet 2 can penetrate the outer wall of the pipe 6, thereby preventing the pipe 6 from being pulled out. It should be noted that based on the working principle of the elastic steel sheet 2, it is easy to know that the elastic steel sheet 2 is only applicable to plastic pipes 6, not metal pipes 6.
[0052] Fifth embodiment like Fig.10 As shown, in some embodiments, a locking ring 13 is provided on the inner side of the clamp 1, and the locking ring 13 is axially limited by the clamp 1, and the elastic steel sheet 2 is fixed on the locking ring 13. The elastic steel sheet 2 is arranged on the locking ring 13, so that the elastic steel sheet 2 can be arranged as needed: for installation occasions with locking requirements, a solution with a locking ring 13 and an elastic steel sheet 2 can be selected, and for occasions with high pressure in the pipeline, a locking ring 13 and an elastic steel sheet 2 can be added on the inner side of the clamp 1 to improve the pressure bearing capacity of the pipeline connection.
[0053] In specific implementation, the lock ring 13 has two structural forms. One is that the lock ring 13 is a circular ring with a notch, which has the advantage that it can be installed from the side of the pipe 6. Fig.10As shown, in this structural form, a groove is provided on the inner side of the clamp 1, and the locking ring 13 is composed of two half rings. The clamping ring composed of the two half rings is clamped in the groove. Before the pipeline construction, the locking ring 13 can be clamped in the groove on the inner side of the clamp 1 in advance. In this way, during the pipeline construction, there is no need to install the locking ring 13 on site, thereby saving construction time and improving the convenience of operation during construction.
[0054] Sixth embodiment like Fig.11 As shown, in this embodiment, dot-shaped protrusions 14 are processed on the inner circumference of the clamp 1. During the tightening process of the clamp 1, the dot-shaped protrusions 14 abut against the outer wall of the pipe 6, thereby increasing the difficulty of relative movement between the pipe 6 and the socket 7.
[0055] Seventh embodiment like Fig.12 , 13 As shown in FIG. 14 , in this embodiment, a group of second elastic claws 15 extend from the other side of the retaining ring A3 opposite to the side where the sealing ring 4 is located, and each second elastic claw 15 is evenly arranged along the circumference, and the end of the second elastic claw 15 is also a wedge-shaped structure; A second elastic claw 15 is provided on the retaining ring A3, so that the retaining ring A3 has a locking function. During the tightening process of the clamp 1, the action of the clamp 1 on the retaining ring A3 is divided into two stages. In the first stage, the retaining ring A3 moves along the axial direction of the pipe 6 under the action of the guide conical surface 10, thereby further pressing the sealing ring 4. In the second stage, after the sealing ring 4 is pressed to the required degree of sealing by the clamp 1 and the retaining ring A3, the inner surface of the clamp 1 is pressed against the outer side of the second elastic claw 15 during the process of continuing to tighten the clamp 1, so that the second elastic claw 15 is pressed against the outer surface of the pipe 6, thereby fixing the pipe 6.
[0056] Eighth embodiment like Fig.15 As shown, in this embodiment, the first elastic claw 12 and the second elastic claw 15 are respectively arranged on the left and right sides of the retaining ring A3, and both sets of elastic claws have a wedging effect, thereby jointly achieving the locking of the pipe 6.
Claims
1. A pipe connection structure, comprising a pipe (6) and a socket-and-spigot pipe fitting, wherein the pipe (6) is inserted inside the socket-and-spigot pipe fitting, and characterized in that: A socket-and-spigot pipe fitting, comprising a socket sleeve (7), a clamp (1) and a sealing ring (4); The pipe (6) is inserted into the inner side of the socket (7) and slidably cooperates with the inner wall of the socket (7), thereby achieving docking of the pipe (6) and the socket (7); A sealing conical surface (11) is machined on the inner side of the end of the socket (7), and a wedge-shaped structure is provided on one side of the sealing ring (4), the wedge-shaped structure wedging into the space between the sealing conical surface (11) and the pipe (6), thereby sealing the gap between the socket (7) and the pipe (6); A clamping portion (5) is provided on the outer side of the end of the socket sleeve (7), the clamp (1) surrounds the outer sides of the sealing ring (4) and the clamping portion (5), and two guide conical surfaces (10) are processed on the inner side of the clamp (1), and the two guide conical surfaces (10) are respectively slidably matched with the outer sides of the sealing ring (4) and the clamping portion (5); A retaining ring A (3) is provided between the clamp (1) and the pipe (6). The retaining ring A (3) and the pipe (6) are slidably matched. One side of the retaining ring A (3) abuts against the end face of the sealing ring (4), and the other side is axially limited by the clamp (1).
2. A pipeline connection structure according to claim 1, characterized in that: The outer side of the retaining ring A (3) is also machined with a guide conical surface (10), which is slidably matched with the guide conical surface (10) on the inner side of the clamp (1). When the clamp (1) is tightened, the retaining ring A (3) is further pressed against the sealing ring (4) by the action of the guide conical surface (10).
3. A pipeline connection structure according to claim 2, characterized in that: A retaining ring B (8) is also provided on the inner side of the clamp (1); in the axial direction of the retaining ring B (8), the retaining ring B (8) is clamped between the sealing ring (4) and the socket sleeve (7); in the radial direction of the retaining ring B (8), the retaining ring B (8) is clamped between the clamp (1) and the pipe (6); Radial cutouts (9) are evenly arranged on the circumference of the inner and outer sides of the retaining ring B (8) in an alternating manner. The radial cutouts (9) are arranged so that the diameter of the retaining ring B (8) can change under the action of force. During the tightening process of the clamp (1), the retaining ring B (8) is compressed by the clamp (1) and its diameter becomes smaller. During the process of the clamp (1) compressing the sealing ring (4), the retaining ring B (8) can continue to fit with the inner wall of the clamp (1), thereby preventing the sealing ring (4) from being squeezed into the gap between the clamp (1) and the socket sleeve (7).
4. A pipeline connection structure according to claim 2, characterized in that: A group of first elastic claws (12) extend from one side of the retaining ring A (3) toward the sealing ring (4), and the first elastic claws (12) are evenly arranged along the circumference; The first elastic claw (12) is inserted into the interior of the sealing ring (4), and the end of the first elastic claw (12) is also a wedge-shaped structure; the wedge-shaped structure at the end of the first elastic claw (12) is located inside the wedge-shaped structure on the sealing ring (4); After the clamp (1) is tightened, the first elastic claw (12) and the wedge-shaped structure on the sealing ring (4) are wedged into the gap between the socket sleeve (7) and the pipe (6), thereby increasing the contact pressure between the sealing ring (4) and the pipe (6). After the contact pressure increases, the friction between the sealing ring (4) and the pipe (6) increases and is sufficient to lock the pipe (6), thereby making it difficult for the pipe (6) and the socket sleeve (7) to separate.
5. A pipeline connection structure according to claim 4, characterized in that: The gap between two adjacent first elastic claws (12) is filled with rubber material from the sealing ring (4).
6. A pipeline connection structure according to claim 1, characterized in that: An elastic steel sheet (2) is provided between the clamp (1) and the pipe (6), and the elastic steel sheet (2) is inclined in the direction of the socket (7). During use, when the pipe (6) has a tendency to move away from the socket (7), the end of the elastic steel sheet (2) can penetrate the outer wall of the pipe (6), thereby preventing the pipe (6) from being pulled out.
7. A pipeline connection structure according to claim 6, characterized in that: A locking ring (13) is provided on the inner side of the clamp (1), and the locking ring (13) is axially limited by the clamp (1), and the elastic steel sheet (2) is fixed on the locking ring (13).
8. A pipeline connection structure according to claim 7, characterized in that: A clamping groove is provided on the inner side of the clamp (1), and the locking ring (13) is composed of two half rings. The clamping ring composed of the two half rings is clamped in the clamping groove, thereby facilitating quick assembly.
9. A pipeline connection structure according to claim 1, characterized in that: The inner circumference of the clamp (1) is processed with dot-shaped protrusions (14); when the clamp (1) is tightened, the dot-shaped protrusions (14) abut against the outer wall of the pipe (6), thereby increasing the difficulty of relative movement between the pipe (6) and the socket (7).
10. A pipeline connection structure according to any one of claims 2, 4 or 5, characterized in that: A group of second elastic claws 15 extend from the other side of the retaining ring A3 opposite to the side where the sealing ring 4 is located. The second elastic claws 15 are evenly arranged along the circumference, and the ends of the second elastic claws 15 are also wedge-shaped structures. During the tightening process of the clamp (1), the action of the clamp (1) on the retaining ring A (3) is divided into two stages. In the first stage, the retaining ring A (3) moves along the axial direction of the pipe (6) under the action of the guide conical surface (10), thereby further pressing the sealing ring (4). In the second stage, after the sealing ring (4) is pressed to the required degree of sealing by the clamp (1) and the retaining ring A (3), the inner surface of the clamp (1) is pressed against the outer side of the second elastic claw (15) during the process of further tightening the clamp (1), so that the second elastic claw (15) is pressed against the outer surface of the pipe (6), thereby fixing the pipe (6).