Scalable Quick-Connect Pipe Fittings and Pipe Connection Systems

Abstract

The present invention discloses a telescopic quick-connect fitting and a pipe connection system, which relates to the technical field of connecting fittings. By designing a first fitting body and a second fitting body that are sleeved with each other, the sleeved part of the two can be used to adjust the overall length of the quick-connect fitting, realizing the quick installation of the quick-connect fitting during the maintenance process, without excessive material costs, and can also solve the connection problem of the quick-connect fitting after the pipe becomes shorter. Through the cooperation of the locking part and the positioning and tightening part, it is beneficial to ensure the positioning stability after elongation between the first fitting body and the second fitting body, and ensure the effective use of the quick-connect fitting. This structure is installed quickly, can improve the installation efficiency, reduce the maintenance cost at the same time, and is safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of connecting pipe fittings, and in particular, to a telescopic quick-connect pipe fitting and a pipe connection system. Background Art

[0002] In the pipe industry, connecting pipe fittings are key structures for connecting two pipes. After the pipe fittings are connected, how to achieve quick maintenance and at the same time improve the convenience of pipe fitting maintenance has become the continuous pursuit of technicians in the pipe fitting industry.

[0003] Currently, commonly used pipe fittings on the market include crimped pipe fittings, flared and slip-on pipe fittings, and hot-melt pipe fittings, etc. These pipe fittings cannot be reused and do not have a telescopic installation function, and are only suitable for use in the first pipe laying connection. If there is a leak at the pipe joint during use, the pipe connected to the above-mentioned connecting pipe fitting can only be cut short, which shortens the pipe length. During maintenance, only a new pipe section and / or at least two additional pipe fittings can be added to reconnect, which undoubtedly increases the material cost.

[0004] In addition, when performing maintenance on a laid pipeline, since the pipeline is usually tightly clamped and fixed, the operating space is easily restricted, and the above-mentioned pipe fittings all require special installation tools and professional plumbers to complete the operation, which is time-consuming and laborious. Therefore, in order to improve work efficiency, reduce installation difficulty, reduce maintenance cost, and improve safety performance, there is an urgent need to provide a new type of connecting pipe fitting suitable for use during pipeline maintenance to solve any of the above problems.

[0005] In view of this, the present invention is specifically proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a telescopic quick-connect pipe fitting and a pipe connection system.

[0007] The present invention is implemented as follows:

[0008] In a first aspect, the present invention provides a telescopic quick-connect pipe fitting, including a first pipe fitting body, a second pipe fitting body, a locking member, a positioning and tightening member, and a quick-connect assembly.

[0009] The first pipe fitting body includes a first telescopic portion and a first core portion, and one end of the first telescopic portion away from the first core portion is a first open end; the second pipe fitting body includes a second telescopic portion and a second core portion, and one end of the second telescopic portion away from the second core portion is a second open end.

[0010] Quick-connect assemblies are installed on both the first core portion and the second core portion.

[0011] The second telescopic part is sleeved on the surface of the first telescopic part, and the wall surfaces of the two are spaced apart and in sealed contact on one side close to the first opening end, so that relative movement can selectively occur between the first telescopic part and the second telescopic part.

[0012] One end of the locking part is fixedly connected to the second opening end of the second telescopic part, and the opposite end protrudes from the end surface of the second opening end and is correspondingly spaced from the first telescopic part. The positioning and tightening part has an opening. The positioning and tightening part is sleeved on the surface of the first telescopic part and is limited between the first telescopic part and the locking part. The contact surface between the positioning and tightening part and the first telescopic part is a rough surface.

[0013] In an alternative embodiment, the area where the first telescopic part and the second telescopic part are in sealed contact forms a limiting contact surface on the side. A limiting part is arranged in the interval between the first telescopic part and the second telescopic part. The limiting part is spaced from the outer wall surface of the first telescopic part and is limited by the limiting contact surface.

[0014] And / or, the limiting part is an elastic ring structure with an opening.

[0015] And / or, the limiting part is a circlip.

[0016] In an alternative embodiment, the first opening end of the first telescopic part is sequentially provided with a sealing groove and a first receiving groove along the end face inward. A sealing member is accommodated in the sealing groove, and the first receiving groove is used for temporarily storing the limiting part.

[0017] The second opening end of the second telescopic part is sequentially provided with a first inner circular part, a first convex part and a second receiving groove along the end face inward. The first convex part protrudes from the first inner circular part and the second receiving groove, and the side surface of the first convex part connected to the first inner circular part is a first inclined surface.

[0018] When the second telescopic part is sleeved on the surface of the first telescopic part, the first convex part pushes the limiting part into the first receiving groove for temporary storage. When the second telescopic part continues to move in the direction of the first core part, the limiting part disengages from the abutment of the first convex part and is accommodated in the second receiving groove for contact and limitation with the limiting contact surface.

[0019] And / or, the number of the sealing grooves is two.

[0020] And / or, the side surface of the second receiving groove away from the first convex part is a second inclined surface.

[0021] In an alternative embodiment, in the non-loaded state, the outer diameter of the limiting part is greater than the diameter of the first inner circular part, and the outer diameter of the limiting part is greater than the diameter of the second receiving groove.

[0022] And / or, the thickness of the limiting part is less than the vertical distance from the first convex part to the bottom of the first receiving groove.

[0023] And / or, the thickness of the limiting member is greater than the vertical distance from the bottom of the second receiving groove to the top of the limiting contact surface.

[0024] In an alternative embodiment, the rough surface in contact with the first telescopic part of the positioning and tightening member is provided on the first telescopic part.

[0025] And / or, the rough surface is located on the side of the first telescopic part away from the first opening end.

[0026] And / or, the rough surface is a tooth-shaped convex surface or a pattern groove surface.

[0027] In an alternative embodiment, the thickness of the limiting member is less than the vertical distance from the bottom of the second receiving groove to the top surface of the rough surface.

[0028] In an alternative embodiment, the locking member includes a connecting part and a limiting part arranged in sequence, and the inner surface of the limiting part is a tapered surface with a decreasing inner diameter in the direction away from the connecting part.

[0029] And / or, the connecting part is provided with threads, and the connecting part is threadedly connected to the second telescopic part.

[0030] In an alternative embodiment, the positioning and tightening member includes an outer tapered part, an outer circular part and a thin tube part arranged in sequence; the outer diameter of the outer tapered part increases sequentially in the direction close to the thin tube part, the outer tapered part cooperates with the limiting part of the locking member for limiting, and the thin tube part extends in the direction close to the connecting part.

[0031] And / or, at least one tightening groove extending axially is provided on the outer tapered part and the outer circular part.

[0032] And / or, the thin tube part is received between the first telescopic part and the second telescopic part.

[0033] In an alternative embodiment, an installation groove is provided on the outer surface of the second telescopic part.

[0034] And / or, the quick-connect component includes any one of an inner-sealed direct-insert quick-connect component or an outer-sealed direct-insert quick-connect component.

[0035] In a second aspect, the present invention provides a pipeline connection system, including a pipeline and a telescopic quick-connect pipe fitting according to any one of the foregoing embodiments, and the pipeline is installed between the first core part and the quick-connect component and / or between the second core part and the quick-connect component.

[0036] The present invention has the following beneficial effects:

[0037] The present invention provides a telescopic quick-connect fitting and a pipe connection system. By designing a first fitting body and a second fitting body, which are sleeved with each other, the sleeved part of the two can be used to adjust the overall length of the quick-connect fitting, realizing the quick installation of the quick-connect fitting during the maintenance process, without excessive material costs, and can also solve the connection problem of the quick-connect fitting after the pipe becomes shorter. Through the cooperation of the locking member and the positioning and clamping member, it is beneficial to ensure the positioning stability after elongation between the first fitting body and the second fitting body, and ensure the effective use of the quick-connect fitting. This structure is quick to install, can improve the installation efficiency, reduce the maintenance cost at the same time, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0039] Figure 1 Stereogram of the telescopic quick-connect fitting provided by the embodiment of the present invention;

[0040] Figure 2 Cross-sectional view of the telescopic quick-connect fitting provided by the embodiment of the present invention;

[0041] Figure 3 Cross-sectional view of the first fitting body provided by the embodiment of the present invention;

[0042] Figure 4 Cross-sectional view of the second fitting body provided by the embodiment of the present invention;

[0043] Figure 5 Stereogram of the limiting member provided by the embodiment of the present invention;

[0044] Figure 6 For Figure 4 Enlarged view of structure A in

[0045] Figure 7 Cross-sectional view of the locking member provided by the embodiment of the present invention;

[0046] Figure 8 Stereogram of the positioning and clamping member provided by the embodiment of the present invention;

[0047] Figure 9 Schematic diagram of the installation process of the telescopic quick-connect fitting provided by the embodiment of the present invention Figure One ;

[0048] Figure 10 Schematic diagram of the installation process of the telescopic quick-connect fitting provided by the embodiment of the present inventionFigure Two ;

[0049] Figure 11 is Figure 9 an enlarged view of structure B in

[0050] Description of main component symbols: 100 - telescopic quick-connect fitting; 110 - first fitting body; 111 - first telescopic part; 1111 - first open end; 1112 - rough surface; 1113 - limiting contact surface; 1114 - sealing groove; 1115 - first receiving groove; 112 - first core part; 113 - limiting protrusion; 120 - second fitting body; 121 - second telescopic part; 1211 - second open end; 1212 - first inner circular part; 1213 - first protrusion part; 1214 - second receiving groove; 1215 - first inclined surface; 1216 - second inclined surface; 1217 - mounting groove; 122 - second core part; 123 - limiting platform; 130 - locking part; 131 - connecting part; 132 - limiting part; 140 - positioning and tightening part; 141 - outer conical part; 142 - outer circular part; 143 - thin tube part; 144 - tightening groove; 150 - quick-connect assembly; 160 - limiting part; 170 - sealing part; 180 - pipeline installation gap. Detailed implementation manners

[0051] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the accompanying drawings in the embodiments of the present invention will be used to clearly and completely describe the technical solutions in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0053] It should be noted that: similar reference numerals and letters denote similar items in the following accompanying drawings. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0054] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. 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, and thus should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0055] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. 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.

[0056] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "couple" 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 a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Please refer to Figure 1 and Figure 2 , this embodiment provides a telescopic quick-connect fitting 100, which includes a first fitting body 110, a second fitting body 120, a locking member 130, a positioning and clamping member 140, and a quick-connect assembly 150.

[0058] Please refer to Figure 3 , the first fitting body 110 includes a first telescopic portion 111 and a first core portion 112, and one end of the first telescopic portion 111 away from the first core portion 112 is a first open end 1111; please refer to Figure 4 , the second fitting body 120 includes a second telescopic portion 121 and a second core portion 122, and one end of the second telescopic portion 121 away from the second core portion 122 is a second open end 1211.

[0059] Quick-connect components 150 are installed on both the first core part 112 and the second core part 122 for installation with pipelines. Specifically, after installation between the first core part 112 and the quick-connect component 150, there is a pipeline installation gap 180, and the pipeline can be accommodated within the pipeline installation gap 180. Similarly, after installation between the second core part 122 and the quick-connect component 150, there is also a pipeline installation gap 180, and the pipeline can be accommodated within the pipeline installation gap 180.

[0060] The second telescopic part 121 is sleeved on the surface of the first telescopic part 111, and the wall surfaces of the two are spaced apart and in sealed contact on one side close to the first opening end 1111. Therefore, relative movement can selectively occur between the first telescopic part 111 and the second telescopic part 121. At the same time, since the two are in sealed contact on one side of the first opening end 1111, water leakage at the connection of the first pipe fitting body 110 and the second pipe fitting body 120 can be avoided after installation.

[0061] Since the second telescopic part 121 is sleeved on the surface of the first telescopic part 111, the outer diameter of the first telescopic part 111 should be smaller than the inner diameter of the second telescopic part 121. In addition, to prevent the first core part 112 from also being inserted into the second telescopic part 121, on the one hand, a limiting platform 123 is provided on the side of the second telescopic part 121 away from the second opening end 1211. When the first telescopic part 111 is accommodated within the second telescopic part 121, the first opening end 1111 contacts and is limited by the limiting platform 123.

[0062] On the other hand, in this embodiment, also to limit the quick-connect component 150, a limiting protrusion 113 is further provided on the first pipe fitting body 110, and the limiting protrusion 113 is located between the first telescopic part 111 and the first core part 112. When the quick-connect component 150 is installed on the surface of the first core part 112, it can be limited by the limiting protrusion 113 to prevent the quick-connect component 150 from being installed in the area of the first telescopic part 111, and at the same time, it can also prevent the first core part 112 from sliding into the second telescopic part 121.

[0063] Relative movement can occur between the first pipe fitting body 110 and the second pipe fitting body 120. When they move to an appropriate length, their positions can be fixed by the locking part 130 and the positioning and tightening part 140 as follows:

[0064] One end of the locking part 130 is fixedly connected to the second opening end 1211 of the second telescopic part 121, and the opposite end protrudes from the end face of the second opening end 1211 and is spaced apart from the first telescopic part 111 correspondingly. The positioning and tightening part 140 has an opening. The positioning and tightening part 140 is sleeved on the surface of the first telescopic part 111 and is limited between the first telescopic part 111 and the locking part 130. The contact surface between the positioning and tightening part 140 and the first telescopic part 111 is a rough surface 1112.

[0065] Since the locking member 130 is fixedly connected to the second telescopic portion 121, the positioning and tightening member 140 is sleeved on the surface of the first telescopic portion 111, and the positioning and tightening member 140 is limited by the locking member 130 and the first telescopic portion 111. Therefore, when the locking member 130 is tightened, the positioning and tightening member 140 below it can be tightened because of the opening, and thus it is in close contact with the surface of the first telescopic portion 111. The surface where the two are in contact is the rough surface 1112, which increases the friction between the positioning and tightening member 140 and the first telescopic portion 111, and prevents displacement between the first telescopic portion 111 and the second telescopic portion 121.

[0066] In this embodiment, a sealing groove 1114 and a first receiving groove 1115 are successively formed in the first opening end 1111 of the first telescopic portion 111 along the end face inward. A sealing member 170 is accommodated in the sealing groove 1114 to seal the first telescopic portion 111 and the second telescopic portion 121 at the sealing groove 1114 to prevent water leakage. The first receiving groove 1115 is used for temporarily storing the limiting member 160.

[0067] Wherein, the side of the first receiving groove 1115 away from the sealing groove 1114 is the rough surface 1112 on the first telescopic portion 111. In this embodiment, the rough surface 1112 is a tooth-shaped convex surface, which is composed of a plurality of annular convex teeth, and the height of the tooth-shaped convex surface is lower than the height of the sealing groove 1114, so that during the sliding process of the first telescopic portion and the second telescopic portion 121, the rough surface 1112 does not affect the sliding process.

[0068] Furthermore, the region where the first telescopic portion 111 and the second telescopic portion 121 are in sealed contact forms a limiting contact surface 1113 on the side. That is, in this embodiment, the surface of the common groove wall between the first receiving groove 1115 and the adjacent sealing groove 1114 close to the first receiving groove 1115 is the limiting contact surface 1113.

[0069] A limiting member 160 is arranged in the interval between the first telescopic portion 111 and the second telescopic portion 121. The limiting member 160 is arranged at an interval from the outer wall surface of the first telescopic portion 111, that is, it does not contact the rough surface 1112, so as to avoid affecting the sliding between the first telescopic portion 111 and the second telescopic portion 121.

[0070] When the first telescopic portion 111 and the second telescopic portion 121 slide in the direction of extending the overall length of the telescopic quick-connect fitting 100, in order to prevent the first telescopic portion 111 from disengaging from the second telescopic portion 121, the limiting member 160 is limited by the limiting contact surface 1113.

[0071] Please refer to Figure 5, in this embodiment, to facilitate the sleeving between the first telescopic part 111 and the second telescopic part 121 and prevent the limiting part 160 from affecting the sliding process of the two, the limiting part 160 is an elastic ring structure with an opening, specifically a circlip.

[0072] Please refer to Figure 6 , furthermore, to ensure the smooth installation of the circlip, in this embodiment, the second opening end 1211 of the second telescopic part 121 is sequentially provided with a first inner circular part 1212, a first convex part 1213, and a second receiving groove 1214 along the end face inward. The first convex part 1213 protrudes from the first inner circular part 1212 and the second receiving groove 1214, and the side surface of the first convex part 1213 connected to the first inner circular part 1212 is a first inclined surface 1215.

[0073] In this embodiment, to ensure the sealing effect between the first telescopic part 111 and the second telescopic part 121 and prevent water leakage at the connection, the number of the sealing grooves 1114 is two, and each sealing groove 1114 accommodates a sealing member 170.

[0074] In this embodiment, the side surface of the second receiving groove 1214 away from the first convex part 1213 is a second inclined surface 1216. By providing the first inclined surface 1215 and the second inclined surface 1216, during the process of inserting the first telescopic part 111 into the second telescopic part 121, the sealing member 170 will not be scratched by the protruding area on the surface of the second telescopic part 121, ensuring the stable and reliable sealing performance of the sealing member 170.

[0075] Please refer to Figure 9 and Figure 10 , when the second telescopic part 121 is sleeved on the surface of the first telescopic part 111, the first convex part 1213 pushes the limiting part 160 into the first receiving groove 1115 for temporary storage. When the second telescopic part 121 continues to move in the direction of the first core part 112, the limiting part 160 disengages from the abutment of the first convex part 1213 and is received in the second receiving groove 1214 for contact and limitation with the limiting contact surface 1113.

[0076] In this embodiment, in order to achieve the cooperation between the limiting member 160 and the structures of the first telescopic part 111 and the second telescopic part 121, when the limiting member 160 is in a non-loaded state, the outer diameter of the limiting member 160 is greater than the diameter of the first inner circular part 1212, and the outer diameter of the limiting member 160 is greater than the diameter of the second receiving groove 1214. So that during the installation process of the limiting member 160, it can first be stuck at the first inner circular part 1212 of the second telescopic part 121 and will not slip off, and finally it will move into the second receiving groove 1214 and be in close contact with the bottom of the second receiving groove 1214, avoiding contact between the limiting member 160 and the rough surface 1112 of the first telescopic part 111, so that the limiting member 160 can achieve the limiting function without affecting the movement process of the first telescopic part 111 and the second telescopic part 121.

[0077] Please refer to Figure 7 , in this embodiment, the locking member 130 includes a connecting part 131 and a limiting part 132 arranged in sequence. The inner surface of the limiting part 132 is a conical surface whose inner diameter decreases in the direction away from the connecting part 131.

[0078] In this embodiment, the connecting part 131 is provided with threads, and the connecting part 131 is threadedly connected to the second telescopic part 121. Specifically, the connecting part 131 is an internal thread, and the outer surface of one side of the second open end 1211 of the second telescopic part 121 is provided with an external thread to ensure the tight connection between the two.

[0079] Please refer to Figure 8 , in this embodiment, the positioning and tightening member 140 includes an outer conical part 141, an outer circular part 142 and a thin tube part 143 arranged in sequence; the outer diameter of the outer conical part 141 increases in sequence along the direction close to the thin tube part 143. The outer conical part 141 is in cooperation with the limiting part 132 of the locking member 130 for limiting. The thin tube part 143 extends in the direction close to the connecting part 131, and the thin tube part 143 is received between the first telescopic part 111 and the second telescopic part 121, so that during the installation process of the limiting member 160, the thin tube part 143 can push the limiting member 160 into the second receiving groove 1214.

[0080] Since the limiting part 132 is arranged as a conical surface and the positioning and tightening member 140 has an outer conical part 141, the conical surface is in cooperation with the outer conical part 141 for limiting, preventing the positioning and tightening member 140 from disengaging from the locking member 130. In addition, due to the conical structure design of the limiting part 132 and the outer conical part 141, when the locking member 130 is threadedly connected to the second telescopic part 121, an inward pressure will be applied along the direction of the conical surface, promoting the close contact between the positioning and tightening member 140 and the first telescopic part 111, and ensuring the fixed connection between the first telescopic part 111 and the second telescopic part 121.

[0081] In this embodiment, in order to make the positioning and tightening member 140 contract inwardly evenly, a plurality of tightening grooves 144 extending axially are provided on the outer conical portion 141 and the outer circular portion 142, and the plurality of tightening grooves 144 are evenly spaced.

[0082] Please refer to Figure 11 , in this embodiment, the thickness of the limiting member 160 is less than the vertical distance H1 from the first protruding portion 1213 to the bottom of the first receiving groove 1115, so that during the installation process of the limiting member 160, one end is resisted by the thin tube portion 143, and on the other side, due to the second telescopic portion 121 moving towards the first core portion 112, the limiting member 160 is successively in contact with the first inner circular portion 1212 and the first inclined surface 1215, and is pressed into the first receiving groove 1115 by the first inclined surface 1215 for temporary storage. When the second telescopic portion 121 continues to move, the second receiving groove 1214 will move to the area where the first receiving groove 1115 is located. At this time, since the outer diameter of the limiting member 160 is greater than the diameter of the second receiving groove 1214, it will quickly transfer and be received in the second receiving groove 1214 and move together with the second telescopic portion 121.

[0083] In this embodiment, the thickness of the limiting member 160 is greater than the vertical distance H2 from the bottom of the second receiving groove 1214 to the top of the limiting contact surface 1113, so as to prevent the limiting member 160 from being stuck between the second receiving groove 1214 and the top of the limiting contact surface 1113, affecting the movement of the first resisting portion and the second telescopic portion 121.

[0084] In this embodiment, the thickness of the limiting member 160 is less than the vertical distance H3 from the bottom of the second receiving groove 1214 to the top surface of the rough surface 1112, so as to prevent the limiting member 160 from affecting the movement of the first resisting portion and the second telescopic portion 121.

[0085] In this embodiment, an installation groove 1217 is provided on the outer surface of the second telescopic portion 121, so that when the second telescopic portion 121 and the locking member 130 are threadedly connected, it is convenient to use tools for installation. For example, the tool can be stuck in the area of the installation groove 1217 to facilitate screwing the second telescopic portion 121 and the locking member 130.

[0086] In this embodiment, the quick-connect component 150 is a direct plug-in quick-connect component 150, which is convenient for pipeline connection.

[0087] This embodiment provides a telescopic quick pipe fitting 100, and its installation process and working principle are as follows:

[0088] First, the locking member 130 is inserted through the first open end 1111 of the first pipe body 110, and then the positioning clamp 140 is inserted through the first open end 1111 of the first pipe body 110. During the insertion process, the positioning clamp 140 can be opened to pass through the sealing groove 1114 area, thereby being inserted onto the rough surface 1112 of the first telescopic portion 111. Then, the limiting member 160 is opened to increase its inner diameter and is also inserted through the first open end 1111 of the first pipe body 110. Finally, the sealing member 170 is installed in the sealing groove 1114.

[0089] The second telescopic part 121 is put on the surface of the first telescopic part 111, and the second opening of the second telescopic part 121 contacts and starts to be put into engagement with the first opening of the first telescopic part 111. At this time, the locking piece 130 is threadedly connected to the second telescopic part 121. It does not need to be completely tightened. It only needs to simply fix the relative position of the locking piece 130 and the second telescopic part 121. It is necessary to ensure that the second telescopic part 121 and the first telescopic part 111 can move relative to each other.

[0090] Since the relative positions of the locking member 130 and the second telescopic part 121 are fixed, the position of the positioning clamp 140 is also limited between the locking member 130, the first telescopic part 111 and the second telescopic part 121, and the thin tube part 143 of the positioning clamp 140 extends between the first telescopic part 111 and the second telescopic part 121, and abuts against the limiting member 160.

[0091] As the second telescopic portion 121 moves toward the first core portion 112, the limiting portion 132 is pushed by the thin tube portion 143 to contact the first outer circular portion 142, the first inclined surface 1215 and the first protruding portion 1213 in sequence, and is pushed into the first accommodating groove 1115 by the first inclined surface 1215 and the first protruding portion 1213 for temporary storage. When the second telescopic portion 121 continues to move toward the first core portion 112, the second accommodating groove 1214 moves to the area corresponding to the first accommodating groove 1115. At this time, the first protruding portion 1213 loses its limiting effect on the limiting member 160. The limiting member 160 has the force to restore to its initial state, so it is quickly transferred to the second accommodating groove 1214 and is in close contact with the bottom of the second accommodating groove 1214. At this time, the limiting member 160 is installed in place, and the limiting member 160 begins to move with the movement of the second telescopic portion 121.

[0092] At this time, the position of the second telescopic part 121 on the surface of the first telescopic part 111 can be adjusted according to the connection needs to determine the overall length of the telescopic quick-connect fitting 100. When the length is confirmed, the locking piece 130 and the threaded area of the second telescopic part 121 are tightened to make the positioning clamp 140 in close contact with the rough surface 1112 on the surface of the first telescopic part 111 to ensure that the length of the telescopic quick-connect fitting 100 is stable.

[0093] During use, first loosen the locking member 130, and insert the pipeline into the pipeline installation gap 180 between the quick-connect component 150 and the first core body part 112 and between the quick-connect component 150 and the second core body part 122. At this time, adjust the overall length of the telescopic quick pipe fitting 100 according to the actual connection requirements, and then tighten the threaded areas of the locking member 130 and the second telescopic part 121 to complete the installation.

[0094] If it is used in a maintenance condition, it is necessary to first cut and remove the leaking or to-be-replaced pipe fitting, chamfer and round it, and then install the telescopic quick pipe fitting 100 in the above manner. The installation and replacement process of this structure is simple, time-saving and labor-saving, without the need to add pipe fittings, and it is more cost-saving for installation, green and environmentally friendly.

[0095] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A telescopic quick-connect pipe fitting, characterized in that, It includes a first pipe fitting body, a second pipe fitting body, a locking member, a positioning and clamping member, and a quick-connecting assembly; The first pipe fitting body includes a first telescopic portion and a first core portion. One end of the first telescopic portion away from the first core portion is a first open end; the second pipe fitting body includes a second telescopic portion and a second core portion. One end of the second telescopic portion away from the second core portion is a second open end; The quick-connecting assembly is installed on both the first core portion and the second core portion; The second telescopic portion is sleeved on the surface of the first telescopic portion, and their wall surfaces are spaced apart and in sealing contact on one side close to the first open end, so that relative movement can selectively occur between the first telescopic portion and the second telescopic portion; One end of the locking member is fixedly connected to the second open end of the second telescopic portion, and the opposite end protrudes from the end surface of the second open end and is correspondingly spaced from the first telescopic portion. The positioning and clamping member has an opening. The positioning and clamping member is sleeved on the surface of the first telescopic portion and is limited between the first telescopic portion and the locking member. The contact surface between the positioning and clamping member and the first telescopic portion is a rough surface; The region where the first telescopic portion and the second telescopic portion are in sealing contact forms a limiting contact surface on the side. A limiting member is arranged in the space between the first telescopic portion and the second telescopic portion. The limiting member is spaced from the outer wall surface of the first telescopic portion and is limited by the limiting contact surface.

2. The telescopic quick-connect fitting according to claim 1, wherein The limiting member is an elastic ring structure with an opening.

3. The retractable quick pipe fitting according to claim 2, wherein, The first open end of the first telescopic portion is sequentially provided with a sealing groove and a first receiving groove along the end face inward. A sealing member is accommodated in the sealing groove, and the first receiving groove is used for temporarily storing the limiting member; The second open end of the second telescopic portion is sequentially provided with a first inner circular portion, a first protrusion portion, and a second receiving groove along the end face inward. The first protrusion portion protrudes from the first inner circular portion and the second receiving groove, and the side surface of the first protrusion portion connected to the first inner circular portion is a first inclined surface; When the second telescopic portion is sleeved on the surface of the first telescopic portion, the first protrusion portion pushes the limiting member into the first receiving groove for temporary storage. When the second telescopic portion continues to move in the direction of the first core portion, the limiting member disengages from the abutment of the first protrusion portion and is accommodated in the second receiving groove for contact and limitation with the limiting contact surface; And / or, the number of the sealing grooves is two; And / or, the side surface of the second receiving groove away from the first protrusion portion is a second inclined surface.

4. The telescopic quick pipe fitting according to claim 3, characterized in that, In a non-loaded state, the outer diameter of the limiting member is greater than the diameter of the first inner circular portion, and the outer diameter of the limiting member is greater than the diameter of the second receiving groove; And / or, the thickness of the limiting member is less than the vertical distance from the first protrusion portion to the bottom of the first receiving groove; And / or, the thickness of the limiting member is greater than the vertical distance from the bottom of the second receiving groove to the top of the limiting contact surface.

5. The telescopic quick-connect pipe fitting according to claim 3, characterized in that, The rough surface of the positioning and clamping member in contact with the first telescopic portion is arranged on the first telescopic portion; And / or, the rough surface is located on a side of the first telescopic part away from the first opening end; And / or, the rough surface is a toothed convex surface or a patterned groove surface.

6. The telescopic quick-connect pipe fitting according to claim 5, characterized in that, The thickness of the limiting member is less than the vertical distance from the bottom of the second receiving groove to the top surface of the rough surface.

7. The telescopic quick-connect pipe fitting according to claim 1, characterized in that, The locking member includes a connecting part and a limiting part arranged in sequence, and the inner surface of the limiting part is a conical surface with an inner diameter decreasing in a direction away from the connecting part; And / or, the connecting part is provided with a thread, and the connecting part is threadedly connected to the second telescopic part.

8. The retractable quick-connect fitting according to claim 7, wherein, The positioning and tightening member includes an outer conical part, an outer circular part and a thin tube part arranged in sequence; the outer diameter of the outer conical part increases sequentially in a direction close to the thin tube part, the outer conical part is matched with and limited by the limiting part of the locking member, and the thin tube part extends in a direction close to the connecting part; And / or, at least one tightening groove extending axially is provided on the outer conical part and the outer circular part; And / or, the thin tube part is received between the first telescopic part and the second telescopic part.

9. The telescopic quick-connect pipe fitting according to claim 1, wherein, An installation groove is provided on the outer surface of the second telescopic part; And / or, the quick-connecting assembly includes an inner-sealed direct-insert quick-connecting assembly or an outer-sealed direct-insert quick-connecting assembly.

10. A pipe connection system, characterized in that, It includes a pipeline and the telescopic quick-connecting pipe fitting according to any one of claims 1 to 9, and the pipeline is installed between the first core part and the quick-connecting assembly and / or between the second core part and the quick-connecting assembly.

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