A flexible hose end connector and a connection method thereof

Abstract

The present invention discloses a flexible hose end connector and a connection method thereof, and relates to the technical field of interconnected structures of pipeline ends, and solves the problem that when the pipeline is in a dynamic state, the sealing gaskets between the connection points - between the flanges and the flanges are easily compressed or expanded unevenly in a certain circumferential direction by the movement of the pipeline, and the expansion limit of the sealing ring is small, resulting in a drop in pipeline pressure or failure. It includes two pairs of joint jackets and joint cores, the corresponding joint jackets and joint cores are interconnected at the inner ends, and an installation channel for pipe installation is formed between the outer ends, wherein a socket is provided at the inner end of one joint core, and the inner end of the other joint core is connected to a corresponding socket block, and a sealing structure is provided at the bottom of the socket, and the socket block is pressed against the sealing structure. It can prevent the joint from causing inconsistent displacement of the sealing ring in a dynamic state and bending state, thereby achieving the effect of reducing the risk of pipeline leakage and pressure failure.

Description

Technical Field

[0001] The invention relates to the technical field of interconnected structures of pipeline ends, and in particular to a flexible hose end connector and a connection method thereof. Background Art

[0002] The existing pipe joint connection forms are mostly flange connection, butt welding and quick socket connection, and high-pressure pipelines are mostly connected by flange connection and butt welding;

[0003] However, during the installation and use of existing pipes, when the pipelines are in a dynamic state, flange-connected pipelines are prone to uneven compression or expansion (displacement) between the connection points - the sealing gaskets between the flanges due to the movement of the pipeline in a certain direction of the circumference, while the expansion limit of the sealing ring is small, resulting in a drop in pipeline pressure or failure. Especially in oil, natural gas and pipelines with strict fire requirements, the consequences of pipeline leakage and pressure failure are even more serious. Summary of the invention

[0004] The object of the present invention is to provide a flexible hose end connector which can prevent the joint from causing inconsistent displacement of the sealing ring under dynamic and bending conditions, thereby reducing the risk of pipeline leakage and pressure failure.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A flexible hose end connector comprises two pairs of joint sleeves and joint cores, wherein the corresponding joint sleeves and inner ends of the joint cores are connected to each other, and an installation channel for installing pipes is formed between the outer ends, wherein the inner end of one joint core is provided with a socket slot, and the inner end of the other joint core is connected to a corresponding socket block, and a sealing structure is provided at the bottom of the socket slot, and the socket block is pressed against the sealing structure.

[0007] Furthermore, the outer periphery of the joint sleeve is connected with a joint mounting flange or a flange blind plate.

[0008] Furthermore, the two joint mounting flanges are pushed forward by hydraulic equipment or threaded screws to insert the socket blocks into the socket sockets.

[0009] Furthermore, the sealing structure includes a flat gasket sealing ring, and a corresponding flat gasket sealing groove is formed at the bottom end of the socket.

[0010] Furthermore, the sealing structure also includes an O-ring, and a corresponding O-ring sealing groove is also provided at the bottom of the flat gasket sealing groove.

[0011] Furthermore, the two joint cores are respectively the first joint core and the second joint core, the first joint core is provided with a socket slot, the second joint core is connected to the socket block, a plurality of positioning pin holes are also provided on the outer periphery of the first joint core, a positioning pin slot is provided on the outer periphery of the second joint core, a joint assembly positioning pin is provided in the positioning pin hole, and the inner end of the joint assembly positioning pin is inserted in the positioning pin slot.

[0012] Furthermore, the outer periphery of the inner core of the first joint is also threadedly connected with a joint locating pin and a locating nut, and the inner periphery of the joint locating pin nut is provided with a screw-in thread and a smooth non-threaded section for compressing the joint assembly locating pin.

[0013] Furthermore, a first chamfer is formed on the outer end of the joint assembly positioning pin close to the side of the joint positioning pin positioning nut.

[0014] Furthermore, a second chamfer is formed at the inner end of the joint assembly positioning pin close to the side of the joint positioning pin positioning nut.

[0015] The present application also discloses a method for connecting a flexible hose end connector, comprising the following steps:

[0016] Install corresponding joint mounting flanges on the outer peripheries of the two joint jackets, then connect the joint inner core to the corresponding joint jacket, and connect the outer ends of the joint inner core and the joint jacket to the corresponding pipe ends by socket connection;

[0017] After the sealing structure is installed at the bottom of the corresponding socket, the assembled two end joints are socketed through the socket and the socket block, and the two joint mounting flanges are pushed in opposite directions by hydraulic equipment or threaded screws until the socket block is plugged into place.

[0018] In summary, the present invention has the following beneficial effects:

[0019] 1. A socket mechanism that fits closely with each other is designed on the concave and convex ends of the joint to prevent inconsistent displacement of the sealing ring in the dynamic state and bending state of the joint, which may lead to pipeline leakage and pressure failure; it can also facilitate efficient and low-cost maintenance and repair of individual pipe sections with safety hazards during use and long-term use, and installation or emergency repair is convenient and fast, especially for the oil, natural gas and pipeline industries with strict requirements on fire;

[0020] 2. The hydraulic propulsion or threaded screw extension method is adopted to effectively avoid the uneven force in the circumferential direction caused by bolt locking; the hydraulic propulsion method is parallel propulsion in the entire section, so that the sealing ring is subjected to completely consistent force on the circumferential section, ensuring the effective sealing of the sealing ring;

[0021] 3. The combination of O-type elastic sealing ring with greater elasticity and polymer flat gasket sealing ring with less elasticity is used to effectively prevent joint leakage and pressure failure caused by slight deviation of the joint socket when the pipeline is in a dynamic state or bending state;

[0022] 4. As the hydraulic equipment pushes forward on the joint installation flange, the joint assembly positioning pins lock the two ends of the joint to prevent the joint from being displaced due to the axial force during the construction and use of the joint;

[0023] 5. As the locating nut of the locating pin is screwed in, the locating nut of the joint locating pin effectively locks the locating pin, effectively preventing the locating pin from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of a flexible hose end connector of the present invention;

[0025] Figure 2 It is a schematic diagram of the exploded structure of a flexible hose end connector of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the inner core portion of the first joint in a flexible hose end connector of the present invention;

[0027] Figure 4 It is a structural schematic diagram of a first joint jacket portion in a flexible hose end connector of the present invention;

[0028] Figure 5 It is a structural schematic diagram of a second connector jacket portion in a flexible hose end connector of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the second joint inner core part of a flexible hose end connector of the present invention;

[0030] Figure 7 The present invention is a schematic structural diagram of a joint assembly positioning pin portion in a flexible hose end connector of the present invention.

[0031] In the figure, 1, first joint sleeve; 2, first joint core; 21, socket slot; 3, second joint sleeve; 4, second joint core; 41, positioning pin slot; 42, socket block; 5, joint mounting flange; 6, O-type sealing groove; 7, flat gasket sealing groove; 8, joint assembly positioning pin; 81, joint positioning pin positioning nut; 82, first oblique chamfer; 83, second oblique chamfer; 9, flat gasket sealing ring; 10, O-type sealing ring. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings, and this embodiment does not constitute a limitation of the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] like Figure 1 and Figure 2 As shown, a flexible hose end connector includes two pairs of joint jackets (a first joint jacket 1 and a second joint jacket 3) and joint cores (a first joint core 2 and a second joint core 4), the corresponding joint jackets and the inner ends of the joint cores are connected to each other by threads, and there is a gap between the outer ends of the two to form an installation channel for the installation of the pipe, and the end of the pipe is installed in the corresponding installation channel by internal expansion and external buckling or external buckling;

[0034] Among them, a socket slot 21 is opened at the inner end of one joint core (the first joint core 2), and the inner end of the other joint core (the second joint core 4) is integrally connected to the corresponding socket block 42. A sealing structure is provided at the bottom of the socket slot 21, and the socket block 42 is inserted into the socket slot 21 and pressed against the sealing structure.

[0035] like Figure 2 and Figure 3 As shown, in this embodiment, the sealing structure includes a flat gasket sealing ring 9 and an O-ring sealing ring 10, a corresponding flat gasket sealing groove 7 is provided at the bottom of the socket 21, and a corresponding O-ring sealing groove is further provided at the bottom of the flat gasket sealing groove 7 for placing or fixing the flat gasket sealing ring 9 and the O-ring sealing ring 10;

[0036] The sealing structure is designed with a tightly matched flat seal ring 9 and O-ring 10, which effectively prevents uneven compression and expansion of the joint connection during the movement and bending of the pipe, and always limits the flat seal ring 9 and O-ring 10 in the circumferential space, greatly reducing the compression and expansion phenomenon;

[0037] Among them, the flat gasket sealing ring 9 and the O-ring 10 are used in combination. The flat gasket sealing ring 9 can be a hard polymer material that meets the working conditions and has a limited elasticity limit. The flat gasket sealing ring 9 can be a composite rubber that meets the working conditions and has high elasticity. They are used in combination to effectively prevent the influence of the dynamic state of the pipe on the connection of the joint.

[0038] like Figure 4 and Figure 5As shown, the outer periphery of the joint sleeve (the first joint sleeve 1 and the second joint sleeve 3) are connected to the corresponding joint mounting flange 5 or flange blind plate by welding or other connection methods. During installation, it is necessary to push the two joint mounting flanges 5 toward each other by means of hydraulic equipment or threaded screws or other devices (the mold sleeve can be used to lock by hydraulic pushing, or bolts can be connected and screwed in to lock), so as to insert the socket block 42 into the socket slot 21 to achieve the connection between the two joints.

[0039] like Figure 2 and Figure 6 As shown, the two joint inner cores are respectively the first joint inner core 2 and the second joint inner core 4. A plurality of positioning pin holes are further provided on the outer periphery of the first joint inner core 2 (located in the outer direction of the socket slot 21). A positioning pin groove 41 is provided on the outer periphery of the second joint inner core 4 (in this embodiment, the positioning pin groove 41 is provided on the outer periphery of the socket block 42). A joint assembly positioning pin 8 is provided in the positioning pin hole. After the inner end of the joint assembly positioning pin 8 passes through the positioning pin hole, a part of it is immersed in and remains in the positioning pin hole, and the other part continues to be inserted inwardly into the positioning pin groove 41, thereby positioning and stabilizing the relative position relationship between the first joint inner core 2 and the second joint inner core 4 after insertion.

[0040] Among them, the outer periphery of the first joint inner core 2 is also threadedly connected with a joint locating pin locating nut 81, and the inner periphery of the joint locating pin nut 81 is provided with a screw-in thread and a smooth non-threaded section that compresses the joint assembly locating pin 8; in this embodiment, one end of the inner periphery of the joint locating pin nut 81 is provided with a screw-in thread section, and the screw-in thread section is threadedly connected to the outer periphery of the first joint inner core 2, and the other end is provided with a smooth non-threaded section. When the joint locating pin nut 81 is screwed in, its smooth non-threaded section compresses the joint assembly locating pin 8 inwardly, pushing it inward, and finally the smooth non-threaded section of the joint locating pin locating nut 81 is blocked in the direction of the joint assembly locating pin 8 leaving the locating pin groove 41 outward, thereby limiting the movement of the locating pin 8.

[0041] like Figure 1 and Figure 7 As shown, a first oblique chamfer 82 is provided at the outer end of the joint assembly locating pin 8 near the joint locating pin locating nut 81 to facilitate the joint assembly locating pin 8 to be further inserted inward when the joint locating pin locating nut 81 moves toward the joint assembly locating pin 8. A second oblique chamfer 83 is provided at the inner end of the joint assembly locating pin 8 near the joint locating pin locating nut 81, and an oblique angle may also be provided on the other side to facilitate the inner end of the joint assembly locating pin 8 to be inserted into the locating pin groove 41 when the socket block 42 is inserted into the socket slot 21.

[0042] The present application also discloses a method for connecting a flexible hose end connector, comprising the following steps:

[0043] Step S1, welding corresponding joint mounting flanges 5 on the outer circumference of the first joint sleeve 1 and the second joint sleeve 3 according to process requirements and different sizes. When welding, attention should be paid to the parallelism between the flange end face and the joint end face;

[0044] Step S2, then, the joint inner core (the first joint inner core 2 and the second joint inner core 4) is connected to the corresponding joint outer shell (the first joint outer shell 1 and the second joint outer shell 3), and the connection is tightened through the screw threads on the joint itself, and it can also be connected by welding.

[0045] Step S3, using conventional internal expansion and external buckling or external buckling methods to connect the outer ends of the joint inner core and the joint outer sleeve with the corresponding pipe ends by socket connection;

[0046] Step S4, after that, the joint locating pin positioning nut 81 is sleeved on the second joint inner core 4 and the second joint outer sleeve 3 that have been installed, and is located outside the joint locating pin groove 41, and the thread of the joint locating pin positioning nut 81 is located on the side close to the second joint outer sleeve 3 (one side has thread, and the other side does not);

[0047] Step S5, after the O-ring 10 and the flat gasket sealing ring 9 are respectively installed in the O-ring sealing groove 6 and the flat gasket sealing groove 7 of the first joint inner core 2 in sequence, the above-assembled two-end joints are socketed with the socket block 42 of the second joint inner core 4 through the socket slot 21 of the first joint inner core 2, and the two joint mounting flanges 5 are respectively pushed in opposite directions by hydraulic equipment or threaded screws (which can be matched with molds and other structures) until the socket block 42 is plugged into place, that is, the positioning pin holes on the second joint inner core 4 and the first joint inner core 2 are consistent with the positioning pin slot 41;

[0048] At the same time, install the joint assembly locating pin 8 in the locating pin groove 41 in a certain direction, and press it hard to make at least the lowest point of the first chamfer 82 in the joint assembly locating pin 8 tangent to or lower than the maximum outer diameter of the first joint inner core 2; then rotate the joint locating pin positioning nut 81 to at least make the joint locating pin positioning nut 81 completely cover the joint assembly locating pin 8, ensure and force (compress and push inward) the joint assembly locating pin 8 to completely enter the locating pin groove 41 (its largest cross-section is located in the locating pin hole and the locating pin groove 41), so that the joint assembly locating pin 8 completely connects the first joint inner core 2 and the second joint inner core 4 together, and they cannot be separated (when disassembling, the locating pin positioning nut 81 needs to be completely unscrewed, and then the joint assembly locating pin 8 is taken out).

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A flexible hose end connector, characterized in that: It comprises two pairs of joint outer sleeves and joint inner cores, the inner ends of the corresponding joint outer sleeves and joint inner cores are connected to each other, and an installation channel for pipe installation is formed between the outer ends, one of the joint inner cores is provided with a socket slot at the inner end, and the inner end of the other joint inner core is connected to a corresponding socket block, a sealing structure is provided at the bottom of the socket slot, and the socket block is pressed against the sealing structure; The two joint inner cores are respectively a first joint inner core and a second joint inner core, a socket slot is provided in the first joint inner core, the second joint inner core is connected to the socket block, a plurality of positioning pin holes are also provided on the outer periphery of the first joint inner core, a positioning pin slot is provided on the outer periphery of the second joint inner core, a joint assembly positioning pin is provided in the positioning pin hole, and the inner end of the joint assembly positioning pin is inserted into the positioning pin slot; The outer periphery of the inner core of the first joint is also threadedly connected with a joint locating pin and a locating nut, and the inner periphery of the joint locating pin and the nut is provided with a screw-in thread and a smooth non-threaded section for compressing the joint assembly locating pin.

2. A flexible hose end connector according to claim 1, characterized in that: The outer periphery of the joint outer sleeve is connected with a joint mounting flange or a flange blind plate.

3. A flexible hose end connector according to claim 2, characterized in that: The two joint mounting flanges are pushed forward by hydraulic equipment or threaded screws to insert the socket block into the socket socket.

4. A flexible hose end connector according to claim 1, characterized in that: The sealing structure comprises a flat gasket sealing ring, and a corresponding flat gasket sealing groove is arranged at the bottom end of the socket.

5. A flexible hose end connector according to claim 4, characterized in that: The sealing structure also includes an O-type sealing ring, and a corresponding O-type ring sealing groove is also provided at the bottom of the flat gasket sealing groove.

6. A flexible hose end connector according to claim 1, characterized in that: The outer end of the joint assembly positioning pin is provided with a first oblique chamfer near one side of the joint positioning pin positioning nut.

7. A flexible hose end connector according to claim 6, characterized in that: A second chamfer is formed at the inner end of the joint assembly positioning pin close to one side of the joint positioning pin positioning nut.

8. A method for connecting a flexible hose end connector according to claim 1, characterized in that: The following steps are included: Install corresponding joint mounting flanges on the outer peripheries of the two joint jackets, then connect the joint inner core to the corresponding joint jacket, and connect the outer ends of the joint inner core and the joint jacket to the corresponding pipe ends by socket connection; After the sealing structure is installed at the bottom of the corresponding socket, the assembled two end joints are socketed through the socket and the socket block, and the two joint mounting flanges are pushed in opposite directions by hydraulic equipment or threaded screws until the socket block is plugged into place.

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