A strong anti-pull-off flexible connection quick plug-in joint

Abstract

The present invention discloses a strong anti-pull-off flexible connection quick plug-in joint, which includes a hose with a connection pipe orifice, a lining sleeved inside the connection pipe orifice, a snap ring sleeved outside the connection pipe orifice, a housing and a tab sleeved outside the connection of the hose and the lining; the snap ring has a first end face and a second end face; a first cavity for installing the snap ring is provided inside the housing, and the first end face is in pressure contact with the front side face of the first cavity; the tab is detachably installed on the housing, and one side end face of the tab is in pressure contact with the second end face to prevent the snap ring from moving; through the simple cooperation of components with a simple structure, the present invention can, while meeting the requirements of convenient installation and maintenance, have strong anti-pull-off and sealing capabilities. The present invention can also pull out the hose, the snap ring and the lining by disassembling the tab, so as to achieve quick replacement.

Description

Technical Field

[0001] The present invention relates to a connection assembly in the field of flexible connection research, and particularly to a strong anti-pulling flexible connection quick plug-in joint. Background Art

[0002] In the current market, the flexible connection methods in the cooling water supply system basically select metal bellows, rubber hoses, nylon hoses, PE / PU / PVC, PEX hoses, Teflon hoses, etc. as the basic pipes, and the structures formed for sealing are usually crimping assemblies, hose clamps, ferrule fittings, pneumatic quick connectors, and self-sealing quick plug connectors.

[0003] In terms of mechanical and hydraulic performance, most of the flexible connections in the cooling system face technical difficulties in aspects such as operating pressure, operating temperature, installation space, and convenience of installation and maintenance. The technical performance of pressure and temperature is related to the selection of the basic hose and the sealing design.

[0004] Under some working conditions, it is required that the flexible connection has the function of quick plugging and unplugging. By quickly separating the hose section from the rigid shell through plugging and unplugging, it can be easily assembled again after replacement or maintenance, and a reliably sealed flow channel can be repeatedly formed. Summary of the Invention

[0005] An object of the present invention is to at least solve one of the technical problems existing in the prior art, and provide a strong anti-pulling flexible connection quick plug-in joint for meeting the flexible connection and quick plugging and unplugging requirements in the liquid supply system.

[0006] According to a first aspect embodiment of the present invention, there is provided a strong anti-pulling flexible connection quick plug-in joint, including:

[0007] A hose having a connection pipe orifice;

[0008] A liner sleeved inside the connection pipe orifice;

[0009] A snap ring sleeved outside the connection pipe orifice, the snap ring having a first end face and a second end face;

[0010] A housing sleeved outside the connection of the hose and the liner, and a first cavity for installing the snap ring is provided inside the housing, and the first end face is in pressure contact with the front side face of the first cavity;

[0011] A tab is detachably installed on the housing, and one end face of the tab is in pressure contact with the second end face to prevent the snap ring from moving.

[0012] According to the strong anti-pulling flexible connection quick plug-in joint described in the first aspect embodiment of the present invention, two parallel slots are provided on the housing, the slots are communicated with the first cavity, and after the tab is inserted into the slots, the end face of the tab is in pressure contact with the second end face.

[0013] The strong anti-pulling flexible connection quick plugging and unplugging joint according to the embodiment of the first aspect of the present invention, the inserting piece is provided with a groove body for avoiding the shell, clamping parts capable of being inserted into the slot are respectively formed on both sides of the groove body, and the clamping parts can extend into the first cavity.

[0014] The strong anti-pulling flexible connection quick plugging and unplugging joint according to the embodiment of the first aspect of the present invention, an arc-shaped part for fitting with the hose is arranged on the inner side of the clamping part.

[0015] The strong anti-pulling flexible connection quick plugging and unplugging joint according to the embodiment of the first aspect of the present invention, a hook part for fixing the inserting piece on the shell is arranged at the free end of the clamping part.

[0016] The strong anti-pulling flexible connection quick plugging and unplugging joint according to the embodiment of the first aspect of the present invention, the inserting piece is a flat plate-shaped flexible part.

[0017] The strong anti-pulling flexible connection quick plugging and unplugging joint according to the embodiment of the first aspect of the present invention, the snap ring has a first boss and a second boss, the outer diameter of the first boss is smaller than the outer diameter of the second boss, the first end face is arranged on the first boss, and the second end face is arranged on the second boss.

[0018] The strong anti-pulling flexible connection quick plugging and unplugging joint according to the embodiment of the first aspect of the present invention, at least one ring groove is arranged on the outer surface of the first boss.

[0019] The strong anti-pulling flexible connection quick plugging and unplugging joint according to the embodiment of the first aspect of the present invention, further includes an O-ring seal arranged between the hose and the shell, and a plurality of installation grooves for installing the O-ring seal are arranged on the inner wall of the shell.

[0020] The strong anti-pulling flexible connection quick plugging and unplugging joint according to the embodiment of the first aspect of the present invention, a threaded part or a welding part for connection is arranged on the shell.

[0021] The beneficial effects of the present invention are as follows: in the present invention, between the inner liner and the snap ring at the connection pipe orifice, after the snap ring is radially compressed by a crimping tool, an interference fit is formed, so that the hose is deformed and extruded to resist pulling out. The inserting piece is detachably installed on the shell, and one side end face of the inserting piece is in contact with the second end face, so that the joint assembly has the ability of anti-pulling out. The present invention is simply combined by components with simple structures, can have strong anti-pulling out and sealing capabilities while meeting the convenience of installation and maintenance. The present invention can also pull out the hose, the snap ring and the inner liner by disassembling the inserting piece, so as to realize quick replacement. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings required for the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, rather than all embodiments. Without creative work, those skilled in the art can also obtain other design solutions and drawings based on these drawings.

[0023] Figure 1 is the structural schematic diagram of the embodiment of the present invention;

[0024] Figure 2 is the front view of the embodiment of the present invention;

[0025] Figure 3 is Figure 2 the sectional view taken along the A-A direction of ;

[0026] Figure 4 is Figure 2 the sectional view taken along the B-B direction of ;

[0027] Figure 5 is the side view of the embodiment of the present invention;

[0028] Figure 6 is Figure 5 the sectional view taken along the C-C direction of ;

[0029] Figure 7 is the structural schematic diagram of the insert piece in the present invention. Detailed Embodiments

[0030] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0031] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is more than two, and the understanding of greater than, less than, exceeding, etc. does not include the recited number, and the understanding of above, below, within, etc. includes the recited number. If the first and second are described, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as "setting", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0034] Referring to Figures 1 to 7 , a strong anti-pull-off flexible connection quick plug-in joint, including a hose 13, a lining 10, a snap ring 16, a housing 11, a plug 12 and an O-ring 15 arranged between the hose 13 and the housing 11. Among them, the O-ring 15 is a rubber seal that meets the usage requirements selected according to the pipeline specifications. The inner wall of the housing 11 is provided with several installation grooves 14 for installing the O-ring 15. The hose 13 has a connecting pipe orifice, and the hose 13 is a hose selected according to the project engineering parameter requirements; the lining 10 is sleeved inside the connecting pipe orifice, and the lining 10 is a thin-walled pipe section adapted to the specification of the hose 13; the snap ring 16 is sleeved outside the connecting pipe orifice, and the snap ring 16 has a first end face and a second end face; the housing 11 is sleeved outside the connection of the hose 13 and the lining 10, and a first cavity 17 for installing the snap ring 16 is provided inside the housing 11, and the first end face is in pressure contact with the front side face of the first cavity 17; the plug 12 is detachably installed on the housing 11, and one side end face of the plug 12 is in pressure contact with the second end face to prevent the snap ring 16 from moving.

[0035] After installing the above accessories, the specific installation process is divided into two stages: The first stage assembly: The housing + O-ring is assembled into a sub-assembly, and the hose + lining + snap ring is crimped into another sub-assembly; The second stage assembly: The two sub-assemblies are axially inserted and assembled in part, so that the snap ring is within the inner section of the slot boundary of the first cavity of the housing. Finally, the plug is inserted to complete the final assembly. By using a crimping tool to crimp the corresponding part of the housing 11, after the snap ring 16 is radially compressed, an interference fit will be formed, causing the hose 13 to deform and be extruded to resist pull-off. The anti-pull-off force is affected by the material of the hose 13, the contact area between the snap ring 16 and the hose 13, and the crimping degree of the snap ring 16. The O-ring 15 is expanded by the outer surface of the hose 13, is extruded and restricted in the installation groove 14 on the housing 11, and generates elastic deformation to form a seal. The plug 12 is detachably installed on the housing 11, and one side end face of the plug 12 is in pressure contact with the second end face, making the joint assembly have the ability to resist pull-off.

[0036] Through tests, the hose 13 is made of FEP hose, the O-ring 15 is made of EPDM material, and the housing 11, the insert 12 and the snap ring 16 are made of 304 stainless steel material, etc., which are combined into a joint assembly. This assembly passes the 1.6 Mpa water pressure test and the 3.0 Mpa burst test, as well as the temperature resistance and temperature change test at -40°C to +70°C and 1.0 Mpa, reaching the material performance limit of the raw materials. Among them, FEP stands for Fluorinated ethylene propylene, which is translated as fluorinated ethylene propylene copolymer; EPDM stands for Ethylene Propylene Diene Monomer, which is translated as ethylene propylene diene monomer.

[0037] In the present invention, the sealing and anti-pulling-off functions are separated and realized by respectively assembling the respective fittings with the base body, which is convenient for production and assembly. In addition, the design and adjustment can be carried out according to the specifications of the pipeline, and the strength parameters can be adjusted according to the project requirements and a margin can be set.

[0038] In some embodiments, two parallel slots are provided on the housing 11, and the slots communicate with the first cavity 17. After the insert 12 is inserted into the slots, the end face of the insert is in pressure contact with the second end face. After the snap ring 16 is radially compressed by a crimping tool, an interference fit is formed, causing the hose 13 to be deformed and extruded to resist pulling off. The anti-pulling-off force is affected by the material of the hose, the contact area between the snap ring 16 and the hose, and the crimping degree of the snap ring 16. The O-ring 15 is expanded by the outer surface of the hose 13, squeezed and restricted in the mounting groove 14 on the housing 11, and elastically deformed to form a seal. The insert 12 is detachably mounted on the housing 11. One side end face of the insert 12 is in pressure contact with the second end face, and the other side end face of the insert 12 is in close contact with the slots, reducing the axial movement. While the insert 12 transmits the force between the snap ring 16 and the housing 11, it restricts the displacement of the snap ring 16, enabling the joint assembly to have the ability to resist pulling off.

[0039] In some embodiments, the insert 12 is provided with a groove body 123 for avoiding the housing 11. On both sides of the groove body 123, clamping portions 122 that can be inserted into the slots are respectively formed. The clamping portions 122 can extend into the first cavity 17, and the clamping portions 122 are used to contact the second end face of the snap ring 16 to prevent the snap ring 16 from axially moving.

[0040] In some embodiments, an arc portion 120 for fitting with the hose 13 is provided inside the clamping portion 122. The insert 12 is installed on the housing 11 along the slots. The arc portion 120 of the clamping portion 122 contacts the hose 13, and the arc portion 120 is concave, avoiding squeezing the hose by the insert 12.

[0041] In some embodiments, a hook portion 121 for fixing the insert piece 12 to the housing 11 is provided at the free end of the card portion 122. The outer surface joints of the hook portion 121 are all smooth arc surfaces, preventing the hose 13 from being scratched at sharp points on the hook portion 121 and improving the service life of the hose 13. The present invention fixes the position of the hose by means of the hook portion 121 and the arc portion 120 and fixes the hose.

[0042] In some embodiments, the insert piece 12 is a flat plate-shaped flexible part, and the slot is rectangular, facilitating the processing and production of the insert piece 12 and the housing 11 and being conducive to improving production efficiency.

[0043] In some embodiments, the snap ring 16 has a first boss 161 and a second boss 160. The outer diameter of the first boss 161 is smaller than that of the second boss 160. The first end face is provided on the first boss 161, and the second end face is provided on the second boss 160. The first boss 161 is used to cooperate with the inner lining through a crimping process to cause the hose to deform and be extruded to resist pulling off; the second boss 160 is used for small-clearance fitting with the side wall of the first cavity of the housing, weakening radial vibration and offset, limiting the compression amount of the O-ring within a normal range, and ensuring stable sealing.

[0044] In some embodiments, at least one annular groove 162 is provided on the outer surface of the first boss 161. The annular groove is used to weaken the influence of the extrusion deformation of the first boss on the dimensional characteristics of the second boss, enabling the two-stage bosses to complete their respective design tasks without affecting each other when regarded as a whole.

[0045] In some embodiments, a threaded portion or a welding portion for connection is provided on the housing 11, facilitating the housing 11 to be fixed at a desired position by means of threaded connection or welding.

[0046] The above is a specific description of the preferred embodiments of the present invention. However, the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A strong anti-pull-off flexible connection quick plug-in joint, characterized in that, Comprising: A hose having a connecting nozzle; A lining sleeved inside the connecting nozzle; A snap ring sleeved outside the connecting nozzle, the snap ring having a first end face and a second end face; A housing sleeved outside the connection of the hose and the lining, and a first cavity for installing the snap ring is provided inside the housing, and the first end face is in pressing contact with the front side face of the first cavity; A inserting piece detachably installed on the housing, one side end face of the inserting piece is in pressing contact with the second end face to prevent the snap ring from moving, and the inserting piece is a flat plate-shaped flexible part; Wherein, the snap ring has a first boss and a second boss, the outer diameter of the first boss is smaller than that of the second boss, the first end face is arranged on the first boss, and the second end face is arranged on the second boss; at least one ring groove is provided on the outer surface of the first boss.

2. The strong anti-pull-off flexible connection quick plug-in joint according to claim 1, characterized in that: Two parallel slots are provided on the housing, the slots communicate with the first cavity, and after the inserting piece is inserted into the slots, the end face of the inserting piece is in pressing contact with the second end face.

3. The strong anti-pulling and flexible connection quick plugging and unplugging joint according to claim 2, characterized in that: The inserting piece is provided with a groove body for avoiding the housing, and clamping parts capable of being inserted into the slots are respectively formed on both sides of the groove body, and the clamping parts can extend into the first cavity.

4. The strong anti-pull-off flexible connection quick plug-in joint according to claim 3, characterized in that: An arc-shaped part for fitting with the hose is provided inside the clamping part.

5. The strong anti-pulling and flexible connection quick plugging and unplugging joint according to claim 3, characterized in that: A hook part for fixing the inserting piece on the housing is provided at the free end of the clamping part.

6. The strong anti-pulling and flexible connection quick plug-in joint according to claim 1, characterized in that: An O-ring is further included and arranged between the hose and the housing, and a plurality of installation grooves for installing the O-ring are provided on the inner wall of the housing.

7. The strong anti-pull-off flexible connection quick plug-in joint according to claim 1, characterized in that: A threaded part or a welding part for connection is provided on the housing.

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