Pipe fitting connecting tool assembly and open-mouth pipe fitting assembling and disassembling method

Abstract

The invention relates to the technical field of pipe fitting connection, in particular to a pipe fitting connection tool assembly and an open-mouth pipe fitting assembling and disassembling method.The pipe fitting connection tool assembly comprises a sleeve, an annular component and a sealing ring, and the sleeve is provided with a conical inner cavity used for being matched with the annular component in a clamped mode and a clamping groove used for installing the sealing ring in a matched mode; the end, extending into the sleeve, of the annular component is expanded. Axial tension is converted into radial pressing force on the pipe fitting through clamping fit of the conical inner cavity and the expanded end of the annular component to achieve self-locking of the pipe fitting, the pipe fitting can be directly pulled out after the expanded end of the annular component is separated from the wall face of the conical inner cavity by pushing the annular component inwards during dismounting, mounting and dismounting are convenient and fast, damage to the wall of the pipe fitting is small, and the dismounting efficiency is high. And repeated utilization of the pipe fitting and the pipe fitting connecting tool assembly is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe fitting connection, and particularly relates to a pipe fitting connection tooling assembly and a method for installing and disassembling a bare-ended pipe fitting. Background Art

[0002] Traditional pipeline connection methods include welding connection, threaded connection, and flange connection. Although the welding connection has good sealing performance and strength, it is not detachable and difficult to repair; the threaded connection method is simple to install, but has poor sealing performance and is prone to loosening, and is not suitable for high-pressure or vibrating environments; the flange connection has high sealing performance and strength, but is complex to install, occupies a large space, and has a high cost. In the ship field, due to the limited space on the ship, a compact and easy-to-install connection method is required, and the pipeline system needs to be frequently maintained due to challenges such as vibration, corrosion, and temperature changes, which puts forward higher requirements for the flexibility and efficiency of pipeline connection.

[0003] The patent document with the publication number of CN219300134U in the prior art provides an axial extrusion pipe joint assembly and a pipe joint. The axial extrusion joint includes an inner ring and an outer ring. The outer ring is sleeved at both ends of the inner ring respectively. After inserting the conduit into the inner ring pipe joint at both ends to a certain depth, a tool is used to axially extrude the two conduits to a specified position, and the outer ring is pushed along the axis of the inner ring to make the outer ring extrude the inner ring and the conduit. The tooth groove structure on the inner surface of the inner ring component is embedded into the conduit to form a mechanical connection and a metal seal. The outer ring, inner ring, and conduit generate elastic-plastic deformation during the extrusion process to form a radial clamping; during the axial extrusion process, the annular clamping platform on the outer surface of the inner ring is elastically deformed and clamped into the annular clamping groove on the inner surface of the outer ring to form self-locking, thereby realizing the connection between the two conduits. This assembly method has a stable connection, and the inner ring and the outer ring are tightly connected, but the disassembly difficulty is large, the joint assembly and the conduit are in a permanent connection, and the reuse rate is low. Summary of the Invention

[0004] The purpose of the present invention is to provide a pipe fitting connection tooling assembly and a method for installing and disassembling a bare-ended pipe fitting in view of the problem that the joint assembly and the pipe fitting in the prior art are in a permanent connection and have a large disassembly difficulty. It can not only realize the rapid connection of the bare-ended pipe through the pipe fitting connection tooling assembly and the detachable connection between the joint assembly and the pipe fitting, but also form a seal and self-locking between the pipe fitting and the connection tooling assembly after connection, and reduce the damage to the pipe fitting.

[0005] In a first aspect, the present invention provides a pipe fitting connection tooling assembly for detachably connecting pipe fittings, including: A sleeve, the sleeve includes a conical inner cavity and a clamping groove. The conical inner cavity and the clamping groove are arranged axially in sequence from the side close to the inlet. The small-diameter port of the conical inner cavity is located on the side close to the inlet compared with the large-diameter port. The clamping groove is arranged circumferentially on the inner wall of the sleeve; An annular component, which is used to be sleeved inside the sleeve. The inner side wall of the annular component is adapted to the profile of the pipe fitting, and the annular component can axially slide between the sleeve and the pipe fitting; one end of the annular component that is used to extend into the sleeve is enlarged and can be clamped with the small-diameter opening of the conical inner cavity; A sealing ring, which is used to be adaptively installed in the clamping groove.

[0006] In this solution, the sleeve, the annular component and the sealing ring cooperate with each other. During use, the sealing ring is used to be installed in the clamping groove of the sleeve to achieve sealing between the pipe fitting and the inner wall of the sleeve. The clamping groove in the sleeve and the conical inner cavity are independent of each other; the annular component is sleeved from the inlet end of the sleeve, and the annular component is sleeved on the outer side wall of the pipe fitting to achieve radial limitation of the annular component. When the enlarged end of the annular component moves to the small-diameter opening of the conical inner cavity, the small-diameter opening of the conical inner cavity is clamped and limited. Under the action of an external force, the wall surface of the conical inner cavity can react on the enlarged part of the annular component in contact, generating a radial force perpendicular to the wall surface of the pipe fitting, so as to press the pipe fitting to achieve self-locking; when the annular component moves inward along the inner cavity of the sleeve, the enlarged part of the annular component can be separated from the wall surface of the conical inner cavity, and the axial limitation state can be released, so that the difficulty of directly pulling out the pipe fitting from the annular component can be reduced, and the pipe fitting can be disassembled.

[0007] By using the above-mentioned pipe fitting connection tooling assembly, the pipe fitting can be quickly installed. After inserting the adapted pipe fitting into the annular component, the axial pulling force can be converted into a radial pressing force on the pipe fitting through the conical inner cavity to achieve self-locking of the pipe fitting. When disassembling, the pipe fitting can be directly pulled out after pushing the annular component inward to make the enlarged end of the annular component separate from the wall surface of the conical inner cavity, and the damage to the wall surface of the pipe fitting is small.

[0008] Preferably, the above-mentioned pipe fitting connection tooling assembly further includes a wedge-shaped block. A plurality of embedding holes are arranged at intervals in the circumferential direction of the enlarged part of the annular component. The wedge-shaped block is used to be detachably connected to the embedding holes, such as clamping, bonding or concave-convex fitting. The embedding holes can be arranged on the outer surface or the inner surface of the annular component. By making the wedge-shaped block contact with the conical inner cavity or the pipe fitting and making the wedge-shaped block detachably arranged, it is convenient to replace, which is beneficial to reducing the wear of the annular component, prolonging the service life of the annular component and reducing the maintenance cost.

[0009] Preferably, a protrusion is formed on one side of the embedding hole close to the end face. The wedge-shaped block is used to be in interference fit with the embedding hole, which is convenient and fast to install. When the enlarged end of the annular component moves towards the inlet end of the sleeve, the protrusion formed by the enlarged end can prevent the wedge-shaped block from falling off.

[0010] Preferably, the embedding hole is a through hole, and a tooth groove structure is provided at the bottom of the wedge-shaped stopper. By setting the embedding hole as a through hole, the wedge-shaped stopper can be in contact with both the conical inner cavity wall surface and the side wall of the pipe fitting simultaneously. When the enlarged end of the annular component moves to the small-diameter opening of the conical inner cavity, under the pressure of the conical inner cavity wall surface, the wedge-shaped stopper has a tendency to move along the embedding hole, increasing the pressing force acting on the pipe fitting. Compared with using an integrally formed annular component to press the pipe fitting, the pressing effect is better and it is labor-saving. During the process of the wedge-shaped stopper radially pressing the pipe fitting, the tooth groove structure can increase the friction between the wedge-shaped stopper and the pipe fitting, and the self-locking effect is better.

[0011] The specific tooth structure style and size of the tooth groove structure can be reasonably selected according to the actual working conditions to have a better anti-detachment effect.

[0012] Preferably, a notch communicating with the embedding hole is provided on one side of the protruding portion in the radial direction, and a concave structure is provided on the upper surface of the wedge-shaped stopper, and the concave structure is in concave-convex fit with the protruding portion at the notch. That is, the wedge-shaped stopper fills the notch on the inner side in the radial direction of the protruding portion, increasing the contact surface between the wedge-shaped stopper and the pipe fitting, and the pressing effect is better.

[0013] Preferably, one end of the annular component extends out of the sleeve, and a convex structure is provided on the outer wall of the extended end of the annular component extending in the radial direction. The convex structure is used for axial limit; when the annular component is pushed inward, when the convex structure at the free end of the annular component abuts against the end face of the sleeve inlet end, it means that the annular component has moved in place.

[0014] Preferably, a limiting plate is provided on the inner wall of the sleeve along the circumferential direction, and the limiting plate is located on the side of the clamping groove away from the sleeve inlet end. The setting of the limiting plate can prevent the over-insertion of the pipe fitting, which is beneficial to ensuring that the insertion depth of the pipe fitting can exceed the position where the sealing ring is located, thereby ensuring the sealing effect.

[0015] Preferably, the tooth groove structure is arranged along the circumferential direction of the pipe fitting. Compared with the arrangement along the axial direction of the pipe fitting, the anti-detachment effect is better and the damage to the pipe fitting wall is small.

[0016] Preferably, the radial dimension of the tooth groove structure does not exceed 4% of the wall thickness of the pipe fitting, and the damage to the pipe wall is small.

[0017] Preferably, the sleeve is a titanium alloy component, which has high strength, light weight, corrosion resistance, low thermal expansion coefficient, good processing performance, fatigue performance and crack propagation resistance, and good stress resistance; the annular component is a rubber component, which has good elasticity and is convenient to process.

[0018] In a second aspect, the present invention provides a method for installing and disassembling a bare-ended pipe fitting, using the above-mentioned pipe fitting connection tooling assembly. In the case of installing the pipe fitting, it includes the following steps: S11: Assemble the pipe fitting connection tooling assembly, install the sealing ring in the card slot, and sleeved the annular part in the sleeve; S12: Insert the pipe fitting into the pipe fitting connection tooling assembly; S13: Pull the pipe fitting axially outwards. The annular part can move along with the pipe fitting under the action of friction until the enlarged end of the annular part is clamped with the conical inner cavity, completing the installation; When disassembling the pipe fitting, the following steps are included: S21: Push the annular part in the sleeve inwards to make the annular part disengage from the wall surface of the conical inner cavity, releasing the clamping state of the enlarged end of the annular part; S22: While keeping the annular part separated from the wall surface of the conical inner cavity, press the annular part and at the same time pull out the pipe fitting to complete the disassembly.

[0019] By adopting the above-mentioned method for installing and disassembling the bare-ended pipe fitting, the rapid connection of the pipe fitting can be realized and the structure can be self-locked after connection. The installation and disassembly of the pipe fitting are convenient, and the construction efficiency is high.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention provides a pipe fitting connection tooling assembly. Under the action of an external force, the axial tension can be converted into the radial pressing force on the pipe fitting through the clamping fit between the conical inner cavity and the enlarged end of the annular part to realize the self-locking of the pipe fitting. When disassembling, by pushing the annular part inwards to make the enlarged end of the annular part disengage from the wall surface of the conical inner cavity, the pipe fitting can be directly pulled out. The installation and disassembly are convenient and fast, the damage to the pipe fitting wall is small, which is conducive to the reuse of the pipe fitting and the pipe fitting connection tooling assembly; 2. The present invention provides a method for installing and disassembling a bare-ended pipe fitting. By using a specific pipe fitting connection tooling assembly to connect the bare-ended pipe, the damage to the pipe fitting is small, and the installation and disassembly are convenient, and the construction efficiency is high. Description of the Drawings

[0021] Figure 1 It is the external view of a pipe fitting connection tooling assembly in Embodiment 1; Figure 2 It is the longitudinal sectional view of the pipe fitting connection tooling assembly in Embodiment 1; Figure 3 It is the assembly schematic diagram of the pipe fitting connection tooling assembly connecting two adjacent pipe fittings; Figure 4 It is the structural schematic diagram of the pipe fitting connection tooling assembly in Embodiment 1 when it is in the retracted position state; Figure 5 It is the structural schematic diagram of the pipe fitting connection tooling assembly in Embodiment 1 when it is in the pushed-out position state; Figure 6 It is the longitudinal sectional view of the sleeve in Embodiment 1; Figure 7 It is the three-dimensional view of the annular part in Embodiment 1; Figure 8 is the front view of Figure 7 ; Figure 9 is the internal structure diagram of Figure 8 ; Figure 10 is the perspective view of the sealing ring in Embodiment 1; Figure 11 is the front view of Figure 10 ; Figure 12 is the sectional view of the sealing ring; Figure 13 is the longitudinal sectional view of the pipe fitting connection tooling assembly in Embodiment 2; Figure 14 is the structural schematic diagram of the pipe fitting connection tooling assembly in the retracted position state in Embodiment 2; Figure 15 is the structural schematic diagram of the pipe fitting connection tooling assembly in the extended position state in Embodiment 2; Figure 16 is the assembly schematic diagram of the annular part and the wedge-shaped stop block in Embodiment 2; Figure 17 is the right view of Figure 16 ; Figure 18 is the front view of Figure 16 ; Figure 19 is the longitudinal sectional view of Figure 18 ; Figure 20 is the structural schematic diagram of the annular part in Embodiment 2; Figure 21 is the right view of Figure 20 ; Figure 22 is the front view of Figure 20 ; Figure 23 is the longitudinal sectional view of Figure 20 ; Figure 24 is the structural schematic diagram of the wedge-shaped stop block in Embodiment 2; Figure 25 is the front view of Figure 24 ; Figure 26 is the enlarged view of part A (symmetric teeth on both sides) in Figure 25 ; Figure 27 is the structural schematic diagram when the teeth of the tooth groove structure are at a single-sided angle perpendicular to the conical inner cavity of the sleeve.

[0022] Markings in the figure: 1 - sleeve; 11 - conical inner cavity; 12 - card slot; 121 - protruding part; 13 - limiting plate; 14 - baffle; 2 - annular component; 21 - enlarged part; 22 - embedding hole; 23 - protruding part; 24 - notch; 25 - convex structure; 3 - wedge-shaped stop block; 31 - tooth groove structure; 32 - concave structure; 4 - sealing ring; 41 - conical surface; 42 - expansion head; 43 - groove; 5 - pipe fitting. Detailed implementation mode

[0023] The present invention will be further described in detail below in conjunction with specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. Any technology implemented based on the content of the present invention belongs to the scope of the present invention.

[0024] In the description of the specific embodiments of the present invention, without special explanation, the expression terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the invention product / device / device is commonly used. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present invention or simplifying the description in the specific embodiments, so as to facilitate technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present invention.

[0025] In addition, if terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but can be slightly inclined or deviated. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in the directions of "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still play its role in the solution of the present invention.

[0026] In addition, the expressions such as "first", "second", "third", etc. in the terms are only used to distinguish the description of the same or similar components, and should not be construed as emphasizing or implying the relative importance of specific components.

[0027] In addition, in the description of the embodiments of the present invention, "several", "multiple", and "a number of" represent at least two. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be a situation of more than 9.

[0028] In addition, in the description of the technical solutions of the present invention, unless otherwise clearly specified / defined / restricted, when terms such as "set", "installed", "connected", "linked", "provided with", "laid", "arranged" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be connection means commonly used in the art such as welding, riveting, bolting, and threaded connection. Such a connection can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components.

[0029] Embodiment 1 As Figures 1 - 12 shown, this embodiment provides a pipe fitting connection tooling assembly for detachably connecting pipe fittings 5, including a sleeve 1, an annular component 2, and a sealing ring 4.

[0030] As Figure 2 、 Figure 6 shown, the sleeve 1 serves as the main body of the tooling, including a conical inner cavity 11, a clamping groove 12, and a limiting plate 13. The conical inner cavity 11, the clamping groove 12, and the limiting plate 13 are arranged in sequence along the axial direction from the side close to the inlet. The conical inner cavity 11, the clamping groove 12, and the limiting plate 13 are independent of each other. The conical inner cavity 11 is used for installing the annular component 2, the clamping groove 12 is used for adaptively installing the sealing ring 4, and the limiting plate 13 is used for limiting the insertion depth of the pipe fitting 5. The two ends of the conical inner cavity 11 are respectively a large-diameter opening and a small-diameter opening. The small-diameter opening of the conical inner cavity 11 faces the inlet of the sleeve 1, and the size of the small-diameter opening of the conical inner cavity 11 is adapted to the outer wall diameter of the annular component 2 for radial limitation; the clamping groove 12 is arranged circumferentially on the inner wall of the sleeve 1, and a baffle 14 is formed between the clamping groove 12 and the large-diameter opening of the conical inner cavity 11. In this embodiment, the radial height dimension of the baffle 14 is adapted to the size of the pipe fitting 5 for radially limiting the pipe fitting 5; in this embodiment, the clamping groove 12 includes an installation groove and a buffer groove. The installation groove and the buffer groove are adjacently arranged along the axial direction. The installation groove is used for installing the sealing ring 4, and the buffer groove provides a accommodation space for the deformation of the sealing ring 4. A protruding portion 121 is provided between the installation groove and the buffer groove, which is convenient for the sealing ring 4 to be bent during the process of pushing the pipe fitting 5, and after the pipe fitting 5 is pulled out, it pops out the sealing ring 4 to restore its original state. In this embodiment, it is preferably to continuously arrange the protruding portion 121 circumferentially, and the radial height of the protruding portion 121 is less than the radial height of the baffle 14, which is convenient for bending and has a good sealing effect; further, it is preferably to set the top end of the protruding portion 121 to be arc-shaped to reduce the concentrated stress at the bending position of the sealing ring 4 and is beneficial to improving the anti-fatigue performance of the sealing ring 4.

[0031] The limiting plate 13 is circumferentially arranged on the inner wall of the sleeve 1. The radial height of the limiting plate 13 should be greater than the outer wall size of the pipe fitting 5. The limiting plate 13 can be arranged at intervals along the circumferential direction or continuously. The limiting plate 13 is used to control the insertion depth of the pipe fitting 5, prevent the over-insertion of the pipe fitting 5, and is conducive to ensuring that the insertion depth of the pipe fitting 5 can exceed the position where the sealing ring 4 is located, thereby ensuring the sealing effect.

[0032] Furthermore, as Figure 2 , Figures 7 - 9 shown, the annular component 2 in this embodiment is used to be sleeved inside the sleeve 1. The inner side wall of the annular component 2 is adapted to the contour of the pipe fitting 5, and the annular component 2 can axially slide between the sleeve 1 and the pipe fitting 5; one end of the annular component 2 used to extend into the sleeve 1 is enlarged so that the outer side wall of the enlarged part can be clamped with the small-diameter opening of the conical inner cavity 11; the other end of the annular component 2 is used to extend out of the sleeve 1, and a convex structure 25 is provided on the outer wall of the extending end of the annular component 2 along the radial direction. On the one hand, the convex structure 25 is used for axial limit. When the annular component 2 is pushed inward, after the convex structure 25 at the extending end of the annular component 2 abuts against the end face of the inlet end of the sleeve 1, it means that the annular component 2 has moved in place, thus facilitating the removal of the pipe fitting 5; on the other hand, the setting of the convex structure 25 increases the contact area with the annular component 2, facilitating positioning and movement. The convex structure 25 can be formed by flanging and bending the extending end of the annular component 2.

[0033] In this embodiment, as Figure 9 shown, a tooth groove structure 31 is provided on the inner surface of the annular component 2. The tooth groove structure 31 is arranged along the circumferential direction of the pipe fitting 5 and is used to increase the friction force with the pipe fitting 5. The radial dimension of the tooth groove structure 31 does not exceed 4% of the wall thickness of the pipe fitting 5, and the damage to the pipe wall is small.

[0034] Furthermore, as Figures 10 - 12 shown, in this embodiment, the sealing ring 4 is an O-shaped rubber ring. One end of the sealing ring 4 is adapted to the shape and size of the installation groove, and a conical surface 41 is provided on the inner side surface. The large diameter of the conical surface 41 is used to face the inlet end of the sleeve 1. The other end of the sealing ring 4 is in the form of an expansion head 42. An arc-shaped groove 43 for fitting and installing with the protruding part 121 is provided on the outer side surface of the sealing ring 4. During the process of inserting the pipe fitting 5 into the annular component 2 and the sleeve 1, the end of the pipe fitting 5 can move along the conical surface 41 inside the sealing ring 4, pushing and deforming the expansion head 42 of the sealing ring 4 along the axial direction until it is clamped into the buffer groove. The elastic deformation of the sealing ring 4 has a certain pressing effect on the wall of the pipe fitting 5 and has a large contact area with the pipe fitting 5, and the sealing effect is good. When the pipe fitting 5 is removed from the sleeve 1, the sealing ring 4 can return to its original state.

[0035] In this embodiment, the sleeve 1 is made of TC4 titanium alloy, which has high strength, low mass, good corrosion resistance, low thermal expansion coefficient, and good machining performance, fatigue performance and crack growth resistance, and good stress resistance. The annular component 2 can be made of high molecular flexible materials such as fluorosilicone rubber, which can be deformed, facilitating the installation and removal of the annular component 2 from the tapered inner cavity 11, and has good elasticity, good plastic shaping ability, convenient processing, and little damage to the pipe fitting 5. In the working state, the titanium alloy sleeve 1 does not directly contact the stainless steel pipe fitting 5, with little wear and low risk of rust and corrosion to the stainless steel pipe fitting 5.

[0036] In the above pipe fitting connection tooling assembly, the sleeve 1, the annular component 2 and the sealing ring 4 cooperate with each other. During installation, first install the sealing ring 4 in the card slot 12 inside the sleeve 1 to facilitate the sealing between the pipe fitting 5 and the inner wall of the sleeve 1; then sleeved and connected with the annular component 2 at the entrance of the sleeve 1, and the enlarged part 21 of the annular component 2 corresponds to the position of the tapered inner cavity 11, and the annular component 2 can rotate circumferentially and slide axially relative to the sleeve 1; then insert the pipe fitting 5 into the annular component 2, and the inserted pipe fitting 5 should be adapted to the pipe orifice of the annular component 2, so that the annular component 2 can block the gap between the sleeve 1 and the pipe fitting 5 to achieve radial and circumferential position limitation. At the same time, the annular component 2 should be able to axially slide with the pipe fitting 5 at the entrance end of the sleeve 1 to facilitate better self-locking.

[0037] The annular component 2 can switch between the pushed-out position state and the retracted position state under the action of an external force. As Figure 5 shown, one end of the annular component 2 in the pushed-out position state extends out of the sleeve 1, and the convex structure 25 at this end is separated from the entrance end face of the sleeve 1, and the enlarged part 21 at the other end of the annular component 2 contacts the wall profile of the tapered inner cavity 11; under the action of an axial pulling force, the wall of the tapered inner cavity 11 has a reaction force on the enlarged part 21 of the annular component 2, thereby generating a radial component force perpendicular to the wall of the pipe fitting 5, and radially clamping the pipe fitting 5 through the elastic deformation of the enlarged part 21 of the annular component 2 to achieve structural self-locking. As Figure 4 shown, when in the retracted position state, the annular component 2 is separated from the wall of the tapered inner cavity 11. At this time, there is no mutual force between the wall of the tapered inner cavity 11 and the annular component 2, and the annular component 2 releases the locking effect on the pipe fitting 5. In this state, the pipe fitting 5 can be directly pulled out to realize the disassembly of the pipe fitting 5, and the difficulty of pulling out the pipe fitting 5 is low.

[0038] This pipe fitting connection tooling assembly is a quick-release structure, which does not involve the fixed tightening of threaded parts such as nuts, reducing the assembly time and improving the operation convenience; and there is no need for a tightening torque during the connection tooling process. While controlling the annular component 2, insert the pipe fitting 5 axially into the connection tooling, and it can be used efficiently and conveniently. The original test sample took about 5 minutes for trial assembly.

[0039] By using the above-mentioned pipe fitting connection tooling assembly, the pipe fitting 5 can be quickly installed and removed, which is convenient for installation and removal, has stable connection, causes little damage to the wall of the pipe fitting 5, and the pipe fitting 5 and the pipe fitting connection tooling assembly can be reused.

[0040] The above structural form can be set as a connection form for connecting two adjacent pipe orifices, or can be used for single-side connection of the pipe fitting 5, and the other side is connected in other forms, not limited to the above examples.

[0041] Embodiment 2 Based on Embodiment 1, since the annular member 2 is an integrally formed rubber ring member, a relatively large axial tension is required to cause the enlarged portion 21 of the annular member 2 to undergo overall deformation when realizing structural self-locking, which is inconvenient to use and has a limited scope of application. Therefore, in this embodiment, a further improvement is made on this basis, and the main difference lies in the structural form of the annular member 2. Specifically, as Figures 13 - 25 shown, this embodiment provides a pipe fitting connection tooling assembly. In addition to the sleeve 1, the annular member 2 and the sealing ring 4, it further includes a wedge-shaped stopper 3. The wedge-shaped stoppers 3 are circumferentially spaced apart on the enlarged portion 21 of the annular member 2 and are used to contact the wall surface of the conical inner cavity 11. The wedge-shaped stoppers 3 are detachably connected to the annular member 2.

[0042] In this embodiment, as Figures 16 - 23 , a number of embedding holes 22 are circumferentially spaced on the enlarged portion 21 of the annular member 2. The embedding holes 22 are through-hole structures, and the wedge-shaped stoppers 3 are installed in each embedding hole 22 with interference fit, which is convenient for installation and removal. Correspondingly, a protrusion 23 is formed on one side of the embedding hole 22 along the axial direction close to the end face. The protrusion 23 at the end is integrally formed on the annular member 2, and the protrusion 23 at the end can prevent the wedge-shaped stopper 3 from falling off during the axial sliding process of the annular member 2. The wedge-shaped stoppers 3 and the annular member 2 act together on the pipe fitting 5 to play the role of connecting the tooling and the pipe fitting 5.

[0043] The upper surfaces of the wedge-shaped stoppers 3 and the upper surface of the enlarged portion 21 of the annular member 2 are both arc surfaces, which are used to fit and squeeze with the conical surface of the conical inner cavity 11 of the sleeve 1, so that the wedge-shaped stoppers 3 clamp the pipe fitting 5 radially; the lower surface of the wedge-shaped stopper 3 is basically flush with the inner surface of the annular member 2 and contacts the wall of the pipe fitting 5. A tooth groove structure 31 is provided on the lower surface of the wedge shape and is used to be stuck into the outer surface of the pipe fitting 5 when clamping the pipe fitting 5 radially to enhance the connection performance between the connection tooling and the pipe fitting 5. The radial dimension of the tooth groove structure 31 does not exceed 4% of the wall thickness of the corresponding specification pipe fitting 5. After the tooth groove structure 31 is pressed into the outer surface of the pipe fitting 5, its indentation does not exceed 4% of the pipe wall thickness, and it will not cause physical scratches and indentations exceeding the regulations on the surface of the pipe fitting 5.

[0044] Further, in an optional embodiment, a notch 24 communicating with the embedding hole 22 is provided on one side of the protrusion 23 in the radial direction. The notch 24 is located inside the protrusion 23. A recessed structure 32 is provided behind the upper surface of the wedge-shaped block 3. The recessed structure 32 is in concave-convex fit with the protrusion 23 at the notch 24, and is used to prevent the wedge-shaped block 3 from being extruded out of the annular member 2 when the wedge-shaped block 3 and the sleeve 1 are mutually extruded. That is, the wedge-shaped block 3 fills the notch 24 inside the protrusion 23 in the radial direction, which can increase the contact surface between the wedge-shaped block 3 and the pipe fitting 5, and the pressing effect is better.

[0045] The wedge-shaped block 3 is preferably made of 30CrMnSi stainless steel material. The material strength of the sleeve 1 is higher than that of the wedge-shaped block 3, and the material strength of the wedge-shaped block 3 is higher than that of the pipe fitting 5 material, which is beneficial to realizing multiple trouble-free working cycles and a wide working temperature range. The wedge-shaped block 3 is defined as a wearing part in this set of tooling.

[0046] During the process of inserting the adapted pipe fitting 5 into the tooling assembly, the annular member 2 moves towards the interior of the structure under the friction force, and the wedge-shaped block 3 moves with the annular member 2 to the open space of the conical inner cavity 11, and the tooth groove structure 31 slides relative to (or does not contact) the wall of the pipe fitting 5. As Figure 15 shown, when the enlarged end of the annular member 2 moves to the small-diameter opening of the conical inner cavity 11, the arc surface of the rubber annular member 2 and the wedge-shaped block 3 assembly fits with the conical surface of the connecting sleeve 1, forming a radial extrusion force. Under the pressure of the wall surface of the conical inner cavity 11, the wedge-shaped block 3 has a tendency to move and separate along the embedding hole 22, and the pipe fitting 5 can be circumferentially held tightly through the tooth groove structure 31 to complete the connection between the connecting tooling and the pipe fitting 5; as Figure 14 shown, after the rubber annular member 2 and the wedge-shaped block 3 assembly are pushed into the conical inner cavity 11 of the sleeve 1, the radial force is removed, and the separation between the connecting tooling and the pipe fitting 5 can be completed. Compared with using the integrally formed annular member 2 to press the pipe fitting 5, in this embodiment, the axial tensile force of the pipe fitting 5 to be connected is converted into a radial pressing force through the wedge-shaped block 3, forming a quick connection and self-locking of the bare-ended pipe. The pressing effect is better, more labor-saving, and the wedge-shaped block 3 is detachably arranged, which is convenient for replacement, beneficial to reducing the wear of the annular member 2, extending the service life of the annular member 2, and thus reducing the maintenance cost.

[0047] In one or more embodiments, to ensure the reliability of the connection between the tooling and the pipe fitting 5, the tooth groove structure 31 can preferably adopt the following four schemes: Scheme 1: Adopt a two-sided symmetric tooth structure (such as Figure 26 ), the axial width of a single tooth is 2 mm, and the tooth depth is 0.10 - 0.16 mm; Scheme 2: Adopt a two-sided symmetric tooth structure (such as Figure 26 ), the axial width of a single tooth is 1 mm, and the tooth depth is 0.10 - 0.16 mm; Solution 3: The single-sided angle of the tooth structure is perpendicular to the angle of the conical inner cavity of the connecting sleeve. As Figure 27 shown, the axial width of a single tooth is 2 mm, and the tooth depth is 0.10 - 0.16 mm; Solution 4: The single-sided angle of the tooth structure is perpendicular to the angle of the conical inner cavity of the connecting sleeve. The axial width of a single tooth is 0.5 mm, and the tooth depth is 0.10 - 0.16 mm.

[0048] Through the simulation of the pull-off force value, under the condition of a given hydraulic pressure of 4.5 MPa and an axial tensile force of 23 kN on the pipe fitting, an axial tensile force is applied at one end of the pipe fitting until the axial tensile force reaches 23 kN, and the displacement value of the pipe fitting at this time is obtained. If the displacement value is small at this time, it can be regarded that the pipe fitting has not undergone obvious slippage; continue to increase the axial tensile force value to 26 kN. If the displacement value of the pipe fitting is small at this time and the pipe fitting has not undergone obvious slippage, the structure remains stable. The axial displacement of the pipe fitting is shown in Table 1.

[0049] Table 1 Axial Displacement

[0050] It can be seen from the experimental results that the axial displacement value of the pipe fitting is small, and there is no obvious slippage. The tooth groove structure and the pipe fitting wall can maintain stable engagement, and the anti-slip effect is good, and it meets the requirement that the maximum deformation of the pipe fitting wall should be less than 4% of the wall thickness, that is, 0.16 mm.

[0051] Example 3 Based on Example 1 or Example 2, this example provides a method for installing and disassembling a bare-ended pipe fitting. Using the above-mentioned pipe fitting connection tooling assembly, when installing the pipe fitting 5, it includes the following steps: S11: Assemble the pipe fitting connection tooling assembly, install the sealing ring 4 in the card slot 12, and sleeved the annular part 2 on the sleeve 1; S12: Manually insert the determined specification bare-ended pipe fitting 5 into the pipe fitting connection tooling assembly until the pipe fitting 5 passes through the sealing ring 4 to the tooling limit plate 13, as Figure 4 or as Figure 14 shown; S13: Manually pull the pipe fitting 5 outward until it cannot be pulled any further. The annular part 2 moves outward due to friction until the tooth groove structure 31 engages with the pipe fitting 5 to form radial clamping, and the installation is completed, as Figure 5 or as Figure 15 shown. The sealing ring 4 is in the annular card slot 12 throughout the process, forming a seal between the sleeve 1 and the pipe fitting 5. There is no need for a tightening torque during the operation process.

[0052] After that, if a positive liquid pressure is applied to the inside of the structure, the radial clamping pressure of the annular part 2 and / or the wedge-shaped block 3 will increase with the increase of the liquid positive pressure.

[0053] When disassembling the pipe fitting 5, the following steps are included: S21: Push the annular member 2 inward to disengage the annular member 2 from the wall surface of the conical inner cavity 11 and release the clamping state of the enlarged end of the annular member 2; S22: While keeping the annular member 2 separated from the wall surface of the conical inner cavity 11, press on the annular member 2 and at the same time pull out the pipe fitting 5 to complete the disassembly.

[0054] By using the above method for installing and disassembling the bare-ended pipe fitting, the pipe fitting 5 can be quickly connected and achieve structural self-locking after connection. The pipe fitting 5 is convenient to install and disassemble, and the construction efficiency is high.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pipe fitting connection tooling assembly, characterized in that For a detachable connecting pipe (5), comprising: A sleeve (1), comprising a conical inner cavity (11) and a retaining groove (12), wherein the conical inner cavity (11) and the retaining groove (12) are arranged in sequence from the side close to the entrance along the axial direction, the small diameter opening of the conical inner cavity (11) is located on the side close to the entrance compared to the large diameter opening, and the retaining groove (12) is arranged on the inner wall of the sleeve (1) along the circumferential direction; An annular component (2) is used to be sleeved in the sleeve (1), the inner side wall of the annular component (2) is adapted to the profile of the pipe (5), and the annular component (2) is capable of axially sliding between the sleeve (1) and the pipe (5); the end of the annular component (2) that is used to extend into the sleeve (1) is enlarged and can be clamped with the small-diameter opening of the conical inner cavity (11); The sealing ring (4) is used to be adapted to be installed in the card slot (12).

2. The pipe fitting connection tooling assembly according to claim 1, wherein, It also comprises a wedge-shaped stopper (3), a plurality of embedding holes (22) are provided at intervals in the circumferential direction of the enlarged portion (21) of the annular component (2), and the wedge-shaped stopper (3) is used for being detachably connected to the embedding holes (22).

3. The pipe fitting connection tooling assembly according to claim 2, characterized in that, A protrusion (23) is formed on one side of the embedding hole (22) close to the end surface, and the wedge-shaped stopper (3) is used for interference fit with the embedding hole (22).

4. A pipe fitting connection tooling assembly according to claim 3, characterized in that, The embedding hole (22) is a through hole, and a tooth groove structure (31) is provided at the bottom of the wedge-shaped stopper (3).

5. The pipe fitting connection tooling assembly according to claim 4, characterized in that, The tooth groove structure (31) is arranged along the circumferential direction of the pipe (5), and the radial dimension of the tooth groove structure (31) does not exceed 4% of the wall thickness of the pipe (5).

6. The pipe fitting connection tooling assembly according to claim 4, characterized in that, A notch (24) communicating with the embedding hole (22) is provided on one side of the protrusion (23) in the radial direction, and a recessed structure (32) is provided on the upper surface of the wedge-shaped stopper (3), wherein the recessed structure (32) is concavely and convexly matched with the protrusion (23) at the notch (24).

7. A pipe fitting connection tooling assembly according to claim 1, characterized in that, One end of the annular component (2) is arranged to protrude from the sleeve (1), and a protruding structure (25) is provided on the outer wall of the protruding end of the annular component (2) extending in the radial direction.

8. A pipe fitting connection tooling assembly according to claim 1, wherein, The inner wall of the sleeve (1) is provided with a limiting plate (13) along the circumferential direction.

9. A pipe fitting connection tooling assembly according to any one of claims 1-8, characterized in that, The sleeve (1) is a titanium alloy component, and the annular component (2) is a rubber component.

10. A method for assembling and disassembling a bare-end pipe fitting, characterized in that, Using the pipe connection tooling assembly according to any one of claims 1 to 9, When installing the pipe fitting (5), the following steps are included: S11: Assemble the pipe connection tooling assembly, install the sealing ring (4) in the groove (12), and sleeve the annular component (2) in the sleeve (1); S12: inserting the pipe fitting (5) into the pipe fitting connecting tooling assembly; S13: The pipe fitting (5) is pulled outwardly along the axial direction, and the annular component (2) can move along with the pipe fitting (5) under the action of friction force until the enlarged end of the annular component (2) is engaged with the conical inner cavity (11); When disassembling the pipe fitting (5), the following steps are included: S21: pushing the annular component (2) in the sleeve (1) inwards, so that the annular component (2) is separated from the wall surface of the conical inner cavity (11), and the clamping state of the enlarged end of the annular component (2) is released; S22: With the annular member (2) kept separated from the wall surface of the tapered inner cavity (11), the pipe fitting (5) is withdrawn.

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