Clamp pipe fittings and pipe connection systems with leak-proof clamping function

Abstract

The present invention discloses a clamp pipe fitting and a pipeline connection system with a leak-proof clamping function, and relates to the technical field of connecting pipe fittings. By providing a pipe fitting body and a positioning sleeve, the gap between the two can be used to accommodate a pipeline, and the positioning sleeve can position the core area of ​​the pipe fitting body. The clamping piece is sleeved on the positioning sleeve, so that the clamping piece will not deviate from the core sealing area when clamping, thereby avoiding the risk of water leakage. In addition, a first long groove is provided on the positioning sleeve. When the clamping piece applies a clamping force to the positioning sleeve, the groove width of the first long groove is reduced, so that the pipeline is tightened inward and in sealing contact with the core part; at the same time, the reduction in the groove width of the first long groove will cause the groove width of the indicator groove to be reduced, and the indicating boss of the indicator is squeezed out of the indicating groove, so that the indicator is separated from the clamping piece, which can be used as an indication structure that the clamping piece is installed in place, thereby improving the installation efficiency of the pipe fitting and saving the troubleshooting time required for the pipe fitting installation process.

Description

Technical Field

[0001] The invention relates to the technical field of connecting pipe fittings, and in particular to a clamp pipe fitting with leak-proof clamping function and a pipeline connection system. Background Art

[0002] Commonly used pipe fittings in the pipeline industry include clamp-type, quick-connect, flared sliding, and ferrule types. However, most common pipe fittings on the market have a single function and have some drawbacks and safety hazards. For example, traditional clamp-type pipe fittings do not have a leak-proof crimping prompt function, which makes troubleshooting difficult, time-consuming, and labor-intensive. When installing the external seal quick-connect fittings, the insertion depth cannot be intuitively seen. It is necessary to measure the insertion depth of the pipe fittings in advance and draw a line on the insertion end of the pipe. There is a risk of inadequate insertion and low installation efficiency. Flared sliding fittings require two steps, flaring and sliding, which require two sets of installation tools to complete, and the installation is cumbersome. The installation of ferrule-type pipe fittings requires tightening the nuts, which is extremely inconvenient for installation in places with small installation spaces, and the nuts are prone to loosening after a period of use, posing a risk of water leakage.

[0003] There are also ways to connect pipes with clamps on the market, but there are also some disadvantages. For example, the clamp is usually directly put on the pipe to be used with the pipe body, and the clamp cannot be positioned on the pipe body, which causes the clamp to easily deviate from the core sealing area after being clamped, posing a risk of water leakage. In addition, the clamps on the market have a single function, and it is impossible to confirm whether the clamp is installed in place during the installation process. The only way to confirm whether the clamp is installed is through a water test.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The object of the present invention is to provide a clamp pipe fitting and a pipeline connection system with leak-proof clamping function.

[0006] The present invention is achieved in that:

[0007] In a first aspect, the present invention provides a clamp pipe fitting with a leak-proof clamping function, comprising a pipe fitting body, a positioning sleeve, a clamping piece and an indicator piece.

[0008] The pipe body includes a core part and a stop part. The stop part is located between the two core parts and protrudes from the outer surface of the core part. One end of the core part close to the stop part is fixed with the positioning sleeve so that the positioning sleeve is sleeved on the outer surface of the core part and is spaced from the outer surface of the core part. The gap between the positioning sleeve and the core part is configured to accommodate the pipe.

[0009] The positioning sleeve is provided with a plurality of press-fit grooves extending along the axial direction of the positioning sleeve, and the press-fit grooves pass through the inner surface and the outer surface of the positioning sleeve; the press-fit grooves include at least one first long groove, and at least one first long groove is provided with an indicator groove, and the groove width of the indicator groove has a tendency to decrease from the outer surface to the inner surface of the positioning sleeve.

[0010] The pressing piece is sleeved on the surface of the positioning sleeve, and the pressing piece includes a pressing piece body. A first through hole is opened at a position of the pressing piece body corresponding to the indicating groove; an indicating boss protruding from the inner surface is provided on the inner surface of the indicating piece, and the width of the end of the indicating boss away from the inner surface of the indicating piece tends to increase along the direction approaching the inner surface of the indicating piece, the indicating boss passes through the first through hole of the pressing piece body and is clamped in the indicating groove of the positioning sleeve, and when the positioning sleeve is pressed by the pressing piece, the indicating groove is configured to squeeze out the indicating boss.

[0011] In an optional embodiment, second through holes are respectively provided on both sides of the first through hole of the clamping part body, and indicating protrusions with the same protruding direction as the indicating protrusion are respectively provided on both sides of the indicating boss of the indicating part, and the indicating protrusions are accommodated in the second through holes.

[0012] And / or, the raised surface of the indicating raised portion is a frustum of a cone.

[0013] And / or, the indicator is in an arc shape.

[0014] And / or, one end of the indicating boss close to the inner surface of the indicating member is a columnar structure, and one end away from the inner surface of the indicating member has an inclined surface, and the inclined surface is in contact with the indicating groove.

[0015] And / or, there are two inclined surfaces, and the two inclined surfaces are connected by a connecting platform, and the connecting platform can be selectively accommodated in the first long groove of the positioning sleeve.

[0016] In an optional embodiment, it also includes an elastic power part, which includes an elastic power portion and a mounting portion. The elastic power portion is located on both sides of the mounting portion. A third through hole is opened on the mounting portion. A first positioning portion is arranged on the edge of the third through hole. The indicating boss of the indicating member passes through the third through hole of the elastic power part and is fixed by the first positioning portion. The elastic power portion can selectively contact the outer surface of the clamping member body.

[0017] And / or, a recessed groove for accommodating the elastic power member is formed on the inner surface of the indicator, and the indicating boss is located in the recessed groove.

[0018] And / or, the first positioning portion is a latching tooth, and the plurality of latching teeth are inclined along the center direction of the third through hole.

[0019] And / or, the elastic power piece is a metal sheet structure, and the elastic power part is a spring sheet.

[0020] And / or, the material of the elastic power part is spring steel or stainless steel.

[0021] In an optional embodiment, the first long groove has an opening at one end of the positioning sleeve close to the stopper portion of the pipe body.

[0022] And / or, an observation hole is provided at an open end of at least one first long groove.

[0023] And / or, the number of the first long grooves is 2 to 4.

[0024] And / or, the press-fit groove further includes a second long groove, the second long groove has no openings at both ends of the axial direction of the positioning sleeve, and the number of the second long grooves is 1 to 12.

[0025] In an optional embodiment, the positioning sleeve is divided into a front section, a middle section and a rear section along the axial direction, the end of the positioning sleeve connected to the pipe body is located in the rear section, and the middle section is configured to contact the inner surface of the clamping part; the middle section and the front section are connected by a first annular groove, and the middle section and the rear section are connected by a second annular groove, and both the first annular groove and the second annular groove protrude toward the inner surface of the positioning sleeve.

[0026] And / or, the outer surface of the first annular groove is provided with a first limiting protrusion, and the outer surface of the second annular groove is provided with a second limiting protrusion, and the first limiting protrusion and the second limiting protrusion are configured to axially limit the clamping piece.

[0027] And / or, a protrusion height of the second limiting protrusion is smaller than a protrusion height of the first limiting protrusion, and both protrude from the outer surface of the middle section.

[0028] And / or, the outer diameter of the positioning sleeve at the second limiting protrusion in a free state is ≥ the inner diameter of the clamping piece ≥ the outer diameter of the positioning sleeve at the second limiting protrusion in a pressed state.

[0029] And / or, the wall thickness at the first annular groove and the second annular groove are both smaller than the wall thickness at the middle section.

[0030] And / or, the indicating groove is in the middle section of the positioning sleeve corresponding to the first long groove.

[0031] And / or, the indicator groove is a V-shaped groove or an arc-shaped groove.

[0032] And / or, the end surface of the rear section of the positioning sleeve is provided with an inner convex ring extending inwardly, and the core part of the pipe body is provided with a connecting groove at one end close to the resisting part, and the inner convex ring is fixedly engaged with the connecting groove.

[0033] In an optional embodiment, a second positioning portion protruding from the outer surface of the positioning sleeve is provided on the first long groove, and a positioning groove is provided on the clamping piece body, and the positioning groove cooperates with the second positioning portion for positioning.

[0034] And / or, the second positioning portion is composed of protrusions on both sides of the first long groove.

[0035] And / or, the indicating groove and the second positioning portion are located on the same first long groove.

[0036] And / or, the inner surface of the positioning sleeve is provided with a plurality of positioning protrusions.

[0037] And / or, each positioning protrusion extends along the axial direction of the positioning sleeve, and a plurality of positioning protrusions are arranged along the radial direction of the positioning sleeve.

[0038] In an optional embodiment, the compression piece further includes a clamping portion, the clamping portion protrudes from an outer surface of the compression piece body, and the clamping portion is configured to change the diameter of the compression piece body.

[0039] And / or, the top surface of the clamping portion is provided with reinforcing ribs.

[0040] And / or, the reinforcing rib extends along the annular circumferential direction of the clamping piece body.

[0041] And / or, the reinforcing rib protrudes along the inner surface direction of the clamping piece.

[0042] In an optional embodiment, the core portion of the pipe body includes a crimping sealing section, which is provided with a plurality of convex teeth and a sealing groove, wherein a sealing ring is accommodated in the sealing groove, and the convex teeth are configured to be in close contact with the pipe.

[0043] And / or, one side surface of the protruding tooth is an inclined surface, and the inclined direction of the inclined surface is a direction close to the blocking portion or a direction away from the blocking portion.

[0044] And / or, the inclined surfaces of two adjacent protruding teeth have opposite inclination directions.

[0045] And / or, when the inclined directions of the inclined surfaces of two adjacent convex teeth are close to each other, a tooth groove is formed between the two adjacent convex teeth; when the inclined directions of the inclined surfaces of two adjacent convex teeth are away from each other, a sealing groove is formed between the two adjacent convex teeth.

[0046] And / or, the outer diameter of the sealing ring is slightly smaller than the outer diameter of the sealing groove.

[0047] In an optional embodiment, the core portion of the pipe body further includes an insertion section and a fixing section, the insertion section and the fixing section are respectively arranged on both sides of the crimping sealing section, and the fixing section is located at one end of the core portion close to the blocking portion.

[0048] And / or, both the insertion section and the fixing section are provided with a first surface inclined in a direction away from the blocking portion.

[0049] And / or, two first surfaces are arranged at intervals on the fixing section, so that the fixing section has a step-like structure with outer diameters decreasing successively.

[0050] In a second aspect, the present invention provides a pipeline connection system, comprising a pipeline and a clamp pipe fitting as described in any one of the aforementioned embodiments, wherein the pipeline is accommodated between a positioning sleeve and a core portion.

[0051] The present invention has the following beneficial effects:

[0052] The present invention provides a clamp pipe fitting and a pipeline connection system with a leak-proof clamping function. By setting a pipe fitting body and a positioning sleeve, the gap between the two can be used to accommodate the pipeline to ensure the connection position of the pipeline and the clamp pipe fitting. The positioning sleeve can position the core area of ​​the pipe fitting body. The clamping piece is sleeved on the positioning sleeve, so that the clamping piece will not deviate from the core sealing area when clamping, thereby avoiding the risk of water leakage. In addition, a first long groove is provided on the positioning sleeve. When the clamping piece applies a clamping force to the positioning sleeve, the groove width of the first long groove is reduced, thereby causing the pipeline to tighten inward and seal with the core part; at the same time, the reduction in the groove width of the first long groove will cause the groove width of the indicator groove to be reduced, and the indicating boss of the indicator is squeezed out of the indicating groove, so that the indicator is separated from the clamping piece, which can be used as an indicating structure that the clamping piece is installed in place, thereby improving the installation efficiency of the pipe fitting and saving the troubleshooting time required for the pipe fitting installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0054] Figure 1 A schematic structural diagram of a clamp pipe fitting with a leak-proof clamping function provided by an embodiment of the present invention;

[0055] Figure 2 A schematic diagram of the structure of a pipe body provided in an embodiment of the present invention;

[0056] Figure 3 A schematic structural diagram of a positioning sleeve from a first perspective provided by an embodiment of the present invention;

[0057] Figure 4 A schematic structural diagram of a positioning sleeve from a second viewing angle provided by an embodiment of the present invention;

[0058] Figure 5 A schematic diagram of the structure of a compression piece provided in an embodiment of the present invention;

[0059] Figure 6 A schematic diagram of the structure of an indicator provided by an embodiment of the present invention;

[0060] Figure 7A structural schematic diagram of the installation process of a clamp pipe fitting with a leak-proof clamping function provided by an embodiment of the present invention;

[0061] Figure 8 for Figure 7 Axial cross-sectional view of the structure;

[0062] Fig. 9 A schematic diagram of the structure of an elastic power member provided in an embodiment of the present invention;

[0063] Fig.10 A schematic diagram of the structure after the elastic power member and the indicator member provided in the embodiment of the present invention are installed;

[0064] Fig.11 A schematic structural diagram of a positioning sleeve provided by an embodiment of the present invention from a third viewing angle;

[0065] Fig.12 for Figure 7 A radial cross-sectional view of the installation structure on the right side of the center;

[0066] Fig.13 for Figure 7 Radial cross-section view of the mounting structure on the left side of the center.

[0067] Main component symbol description: 10-clamp pipe fitting; 100-pipe fitting body; 110-core body; 111-connecting groove; 112-convex teeth; 113-sealing groove; 114-tooth groove; 115-first surface; 116-fixing section; 117-crimping sealing section; 118-insertion section; 120-blocking part; 200-positioning sleeve; 211-first long groove; 212-second long groove; 220-indicating groove; 230-observation hole; 241-front section; 242-middle section; 243-rear section; 244-first annular groove; 245-second annular groove; 250-first limiting protrusion; 26 0-second limiting protrusion; 270-inner convex ring; 280-second positioning portion; 290-positioning protrusion; 300-pressing piece; 310-pressing piece body; 311-first through hole; 312-second through hole; 313-positioning groove; 320-clamping portion; 321-reinforcing rib; 400-indicating piece; 410-indicating boss; 411-connecting platform; 420-indicating protrusion; 430-sunk groove; 500-elastic power piece; 510-elastic power portion; 520-installing portion; 521-third through hole; 522-first positioning portion; 600-sealing ring; 700-gap. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be a clear and complete description of the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0069] 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0070] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0071] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0072] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0073] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] Please refer to Figure 1 and Figure 8The embodiment of the present invention provides a clamp pipe fitting 10 with a leak-proof clamping function, including a pipe fitting body 100, a positioning sleeve 200, a clamping member 300, an indicator member 400, an elastic power member 500 and a sealing ring 600.

[0075] Please refer to Figure 2 The pipe body 100 includes a core portion 110 and a stop portion 120, wherein the stop portion 120 is located between the two core portions 110 and protrudes from the outer surface of the core portion 110. One end of the core portion 110 close to the stop portion 120 is fixedly matched with the positioning sleeve 200, so that the positioning sleeve 200 is sleeved on the outer surface of the core portion 110 and is spaced from the outer surface of the core portion 110, and the gap 700 between the positioning sleeve 200 and the core portion 110 is configured to accommodate the pipe.

[0076] Please refer to Figure 3 The positioning sleeve 200 is provided with a plurality of press-fit grooves extending along the axial direction of the positioning sleeve 200, and the press-fit grooves penetrate the inner and outer surfaces of the positioning sleeve 200; the press-fit grooves include at least one first long groove 211, and at least one first long groove 211 is provided with an indicator groove 220, and the groove width of the indicator groove 220 along the direction from the outer surface to the inner surface of the positioning sleeve 200 has a decreasing trend, that is, the indicator groove 220 is not a square groove, and its shape can be a V-shaped groove or an arc groove. In the case of Figure 3 In the illustrated embodiment, the indicator groove 220 is a V-shaped groove.

[0077] In such Figure 3 and Figure 4 In the illustrated embodiment, there are two first long grooves 211, but only one of the first long grooves 211 is provided with an indicating groove 220. In other embodiments, there may be three or four first long grooves 211, or more, and the indicating groove 220 may be provided on each first long groove 211, or on one or two of the first long grooves 211, as long as the functions of positioning and extruding the indicating member 400 can be achieved.

[0078] like Figure 1 and Figure 5 As shown, the clamping member 300 is sleeved on the surface of the positioning sleeve 200, and the clamping member 300 includes a clamping member body 310, and a first through hole 311 is opened at a position corresponding to the indicating groove 220 of the clamping member body 310; please refer to Figure 6 The inner surface of the indicator 400 is provided with an indicator boss 410 protruding from the inner surface; please refer to Figure 7 and Figure 8The width of the end of the indicating boss 410 away from the inner surface of the indicating member 400 tends to increase in the direction approaching the inner surface of the indicating member 400. The indicating boss 410 passes through the first through hole 311 of the clamping member body 310 and is clamped in the indicating groove 220 of the positioning sleeve 200. When the positioning sleeve 200 is compressed by the clamping member 300, the indicating groove 220 is configured to squeeze out the indicating boss 410 to prompt that the clamp pipe fitting 10 with a leak-proof clamping function is installed in place.

[0079] Since the indicating groove 220 is a V-shaped groove and the top of the indicating boss 410 also has a V-shaped inclined surface, when the clamping piece 300 is sleeved on the surface of the positioning sleeve 200, the first through hole 311 of the clamping piece 300 is aligned with the indicating groove 220 of the positioning sleeve 200, and then the indicating piece 400 is installed on the surface of the clamping piece 300. The indicating boss 410 passes through the first through hole 311 and the indicating groove 220, and the clamping piece 300 can be positioned on the positioning sleeve 200 to avoid water leakage of the clamp pipe fitting 10 with leak-proof clamping function due to incorrect clamping position of the clamping piece 300.

[0080] In addition, since the inner diameter of the clamping part 300 is reduced during the extrusion process, the inner diameter of the positioning sleeve 200 inside it is compressed synchronously, and the groove width of the first long groove 211 will gradually decrease, thereby squeezing out the indicating boss 410 inside the indicating groove 220. When the operator observes that the indicating part 400 with the indicating boss 410 protrudes or falls off, he considers that the installation is completed. The installation completion indication effect of this structure is obvious, which is beneficial to improving the installation efficiency of the clamp pipe fitting 10 with a leak-proof clamping function.

[0081] In such Figure 6 In the illustrated embodiment, the end of the indicating boss 410 close to the inner surface of the indicating member 400 is a columnar structure, and the end away from the inner surface of the indicating member 400 has an inclined surface, and the inclined surface is in contact with the indicating groove 220. Specifically, there are two inclined surfaces, which are connected by a connecting platform 411, and the connecting platform 411 can be selectively accommodated in the first long groove 211 of the positioning sleeve 200.

[0082] Because Figure 3 In the illustrated embodiment, the groove walls of the indicating groove 220 are inclined along both sides of the first long groove 211 , so that when the positioning sleeve 200 is in a natural state (non-external force squeezed state), there is a through area between the two inclined surfaces of the indicating groove 220 , which is used to accommodate the connecting platform 411 at the top of the indicating boss 410 .

[0083] like Figure 6As shown, in the present embodiment, in order to ensure that the indication effect of the indicator 400 being squeezed out is more obvious, the area of ​​the indicator 400 can be increased, but in order to ensure that the indicator 400 can be installed on the surface of the clamping part 300, second through holes 312 are respectively provided on both sides of the first through hole 311 of the clamping part body 310, and indication protrusions 420 with the same protruding direction as the indication protrusion 410 are respectively provided on both sides of the indication boss 410 of the indicator 400, and the indication protrusion 420 is accommodated in the second through hole 312.

[0084] like Figure 6 The main body of the indicator 400 is arc-shaped. In order to ensure that the indicating protrusion 420 can be separated from the second through hole 312 so that the indicator 400 can play the function of indicating that the installation is completed, the protruding surface of the indicating protrusion 420 is a conical surface.

[0085] In this embodiment, in order to ensure that the indicator 400 is squeezed out more obviously and the operator can intuitively confirm whether the clamp pipe fitting 10 is installed in place, an elastic power part 500 is also arranged between the clamping part 300 and the indicator 400, and the elastic power part 500 is configured to apply an outward popping force to the indicator 400.

[0086] Please refer to Fig. 9 and Fig.10 The elastic power member 500 includes an elastic power portion 510 and a mounting portion 520. The elastic power portion 510 is located on both sides of the mounting portion 520. The elastic power member 500 is arc-shaped as a whole to match the arc-shaped indicator 400. When the shape of the indicator 400 changes, the shape of the elastic power member 500 can also be adjusted synchronously, or the arc-shaped structure can be maintained.

[0087] For example, when the indicator 400 is an elliptical structure, the shape of the elastic power member 500 can be an elliptical structure or an arc structure, or a circular shape, a square shape, etc.

[0088] In order to ensure that the indicating boss 410 can still cooperate with the indicating groove 220 on the positioning sleeve 200 after the elastic power member 500 is added, a third through hole 521 is provided on the mounting portion 520 of the elastic power member 500, and a first positioning portion 522 is provided at the edge of the third through hole 521, and the first positioning portion 522 is used to contact and position with the indicating boss 410. During the installation process, the indicating boss 410 of the indicating member 400 passes through the third through hole 521 of the elastic power member 500 and is fixed by the first positioning portion 522; the elastic power portion 510 can selectively contact the outer surface of the clamping member body 310, so that after the indicating boss 410 is squeezed out by the indicating groove 220, the elastic power member 500 has the elastic force to further eject the indicating member 400.

[0089] In this embodiment, the elastic power member 500 is a metal sheet structure, and the elastic power part 510 is a spring. The first positioning part 522 is a latching tooth, and the number of the latching teeth is four, and each latching tooth is inclined along the center direction of the third through hole 521 .

[0090] For further information, please refer to Figure 6 In order to ensure the installation space of the elastic power member 500 and make the overall structure of the clamp pipe fitting 10 more compact, a recessed groove 430 for accommodating the elastic power member 500 is opened on the inner surface of the indicator member 400, and the indicating boss 410 is located in the recessed groove 430. Therefore, when the elastic power member 500 is sleeved on the indicating boss 410, the elastic power member 500 is also located in the recessed groove 430.

[0091] In this embodiment, the indicating boss 410 is located at the center of the indicating member 400 , and the two indicating protrusions 420 are symmetrically arranged on both sides of the indicating boss 410 to ensure that the indicating member 400 can be extruded more stably.

[0092] In this embodiment, in order to ensure that the elastic power member 500 has reliable elastic force, the material of the elastic power member 500 is spring steel or stainless steel.

[0093] In this embodiment, in order to improve the deformation ability of the positioning sleeve 200 when being squeezed and ensure close contact between the pipe and the core part 110, the first long groove 211 has an opening at one end of the positioning sleeve 200 close to the supporting part 120 of the pipe body 100, and an observation hole 230 is provided at the open end of at least one first long groove 211.

[0094] The opening not only ensures the deformation of the positioning sleeve 200, but also serves as a structure for observing whether the pipe is inserted in place at one end close to the resisting portion 120. Therefore, the width of the first long groove 211 is increased at the opening end to serve as an observation hole 230, so that the first long groove 211 has multiple functions such as ensuring deformation and observing the insertion position.

[0095] If the number of the first long grooves 211 on the positioning sleeve 200 increases, the corresponding number of openings will also increase, which may cause the overall strength of the positioning sleeve 200 to decrease, and the positioning sleeve 200 will be damaged during the squeezing and tightening process. Therefore, the number of the first long grooves 211 should not be too large, but the contraction function of the positioning sleeve 200 needs to be guaranteed. Therefore, please refer to Figure 3 , 4 and Fig.11 The press-fit groove further includes a second long groove 212 , and the second long groove 212 has no openings at both ends of the axial direction of the positioning sleeve 200 .

[0096] In such Figure 3 , 4 and Fig.11In the illustrated embodiment, the number of the second long grooves 212 is 4. In other embodiments, the number of the second long grooves 212 may be 2, 3, 5, 6, 7, 8, 9, 10, 11 or 12. The number of the second long grooves 212 may be set according to the material and size of the positioning sleeve 200, as long as the positioning sleeve 200 has good tightening ability after being compressed by external force.

[0097] In this embodiment, the positioning sleeve 200 is divided into a front section 241, a middle section 242 and a rear section 243 along the axial direction, wherein the end of the positioning sleeve 200 connected to the pipe body 100 is located in the rear section 243, and the middle section 242 is configured to contact the inner surface of the clamping part 300; the middle section 242 and the front section 241 are connected by a first annular groove 244, and the middle section 242 and the rear section 243 are connected by a second annular groove 245, and the first annular groove 244 and the second annular groove 245 both protrude toward the inner surface direction of the positioning sleeve 200.

[0098] By providing the first annular groove 244 and the second annular groove 245, during the compression process of the positioning sleeve 200, the middle section 242 area between the first annular groove 244 and the second annular groove 245 can be stably contracted, reducing the bending deformation of the pipeline in the middle section 242, ensuring a tighter connection between the pipeline and the core body 110 in the middle section 242, and avoiding water leakage.

[0099] In this embodiment, the outer surface of the first annular groove 244 is provided with a first limiting protrusion 250, and the outer surface of the second annular groove 245 is provided with a second limiting protrusion 260. The first limiting protrusion 250 and the second limiting protrusion 260 are configured to axially limit the clamping part 300. The clamping part 300 is fixed between the first limiting protrusion 250 and the second limiting protrusion 260 to prevent the clamping part 300 from slipping off the surface of the positioning sleeve 200.

[0100] In this embodiment, in order to facilitate the clamping member 300 to be sleeved on the surface of the positioning sleeve 200 , the protrusion height of the second limiting protrusion 260 is smaller than the protrusion height of the first limiting protrusion 250 , and both protrude from the outer surface of the middle section 242 .

[0101] In this embodiment, in order to ensure the positioning of the clamping piece 300, the outer diameter of the positioning sleeve 200 at the second limiting protrusion 260 in the free state is ≥ the inner diameter of the clamping piece 300 ≥ the outer diameter of the positioning sleeve 200 at the second limiting protrusion 260 in the squeezed state.

[0102] In this embodiment, the wall thickness at the first annular groove 244 and the second annular groove 245 are both smaller than the wall thickness of the middle section 242, so as to ensure that the bending deformation of the pipe at the first annular groove 244 and the second annular groove 245 is increased, while the bending deformation at the middle section 242 is reduced, so that the pipe can be connected more stably at the middle section 242.

[0103] In this embodiment, the indicating groove 220 is located at the middle section 242 of the positioning sleeve 200 corresponding to the first long groove 211 .

[0104] In this embodiment, the end face of the rear section 243 of the positioning sleeve 200 is provided with an inner convex ring 270 extending inward, and the core portion 110 of the pipe body 100 is provided with a connecting groove 111 at one end close to the supporting portion 120. The inner convex ring 270 is fixedly engaged with the connecting groove 111 to achieve stable installation of the positioning sleeve 200 and the pipe body 100.

[0105] The first long groove 211 is provided with a second positioning portion 280 protruding from the outer surface of the positioning sleeve 200 , and the clamping member body 310 is provided with a positioning groove 313 , which cooperates with the second positioning portion 280 for positioning.

[0106] The positioning groove 313 cooperates with the second positioning portion 280, so that the pressing piece 300 cannot rotate on the surface of the positioning sleeve 200. The pressing piece 300 is further axially positioned by the first limiting protrusion 250 and the second limiting protrusion 260 to prevent the pressing piece 300 from moving in the axial direction of the positioning sleeve 200. Therefore, after installation, the pressing piece 300 can be stably fixed to the middle section 242 of the positioning sleeve 200 without displacement in any direction, so as to ensure that the pipeline can be stably pressed down near the middle section 242 of the positioning sleeve 200 without displacement.

[0107] In order to facilitate the rapid alignment of the positioning sleeve 200 and the clamping piece 300 during installation, in this embodiment, the number of the first long grooves 211 is two, and the second positioning portion 280 and the indicator groove 220 are arranged on the same first long groove 211, and the other first long groove 211 only has an observation hole 230.

[0108] In this embodiment, the second positioning portion 280 is composed of protrusions on both sides of the first long groove 211 .

[0109] In this embodiment, in order to limit the position of the pipeline and prevent it from sliding out, especially when the pipeline and the clamp pipe fitting 10 are installed vertically, the pipeline is easy to slide down due to gravity. Therefore, four positioning protrusions 290 are provided on the inner surface of the positioning sleeve 200.

[0110] In other embodiments, the number of the positioning protrusions 290 may be increased or decreased, for example, may be 2, 3, 5, 6, 7, 8 or more.

[0111] In this embodiment, each positioning protrusion 290 extends along the axial direction of the positioning sleeve 200 , and a plurality of positioning protrusions 290 are arranged along the radial direction of the positioning sleeve 200 .

[0112] In this embodiment, the compression piece 300 further includes a clamping portion 320, which protrudes from the outer surface of the compression piece body 310, and the clamping portion 320 is configured to change the diameter of the compression piece body 310. During the installation process, the clamping portion 320 can be clamped by an external tool to shrink the inner diameter of the compression piece body 310.

[0113] In order to prevent the top of the clamping part 320 from being deformed when the clamping part 320 is clamped by an external tool, a reinforcing rib 321 is provided on the top surface of the clamping part 320. The reinforcing rib 321 extends along the annular direction of the clamping part body 310, and the reinforcing rib 321 protrudes along the inner surface direction of the clamping part 300.

[0114] In other embodiments, the shape and position of the reinforcing rib 321 may also be set to other structures as needed.

[0115] In this embodiment, the core part 110 of the pipe body 100 includes a crimping seal section 117, which can be in close contact with the inner wall surface of the pipe to prevent water leakage. The crimping seal section 117 is provided with a plurality of protruding teeth 112 and a sealing groove 113, wherein the sealing groove 113 accommodates a sealing ring 600, and the protruding teeth 112 are configured to be in close contact with the pipe.

[0116] In this embodiment, one side surface of the protruding tooth 112 is an inclined surface, and the inclination direction of the inclined surface is a direction close to the supporting portion 120 or a direction away from the supporting portion 120. The inclination directions of the inclined surfaces of two adjacent protruding teeth 112 are opposite to ensure that the connection between the pipe and the core body 110 is more stable.

[0117] In this embodiment, when the inclined directions of the inclined surfaces of two adjacent protruding teeth 112 are close to each other, a tooth groove 114 is formed between the two adjacent protruding teeth 112; when the inclined directions of the inclined surfaces of two adjacent protruding teeth 112 are away from each other, a sealing groove 113 is formed between the two adjacent protruding teeth 112.

[0118] In this embodiment, the outer diameter of the sealing ring 600 is slightly smaller than the outer diameter of the sealing groove 113 to ensure that the sealing ring 600 is tightly fitted with the sealing groove 113. By providing a sealing ring 600 with a smaller outer diameter, if the clamp pipe 10 is not installed in place, water can quickly pass through the outside of the sealing ring 600 and flow out, which is convenient for operators to detect water leakage and avoids the situation where the water leakage detection result is inaccurate due to the sealing ring 600 being too large.

[0119] In this embodiment, the core portion 110 of the pipe body 100 also includes an insertion section 118 and a fixing section 116, which are respectively arranged on both sides of the crimping sealing section 117. The insertion section 118 is the first part that is contacted when the pipe is inserted into the core portion 110, and the fixing section 116 is located at one end of the core portion 110 close to the supporting portion 120, and is used to fix the positioning sleeve 200.

[0120] In this embodiment, in order to reduce the difficulty of inserting the pipe and the difficulty of inserting the positioning sleeve 200 into the core portion 110 , a first surface 115 inclined in a direction away from the blocking portion 120 is provided on the insertion section 118 and the fixing section 116 .

[0121] In this embodiment, the fixing section 116 is not only used to fix the positioning sleeve 200, but also needs to be used to fix the pipeline. Therefore, two first surfaces 115 are arranged at intervals on the fixing section 116, so that the fixing section 116 has a step-like structure with a decreasing outer diameter.

[0122] In other embodiments of the present invention, a pipeline connection system is provided, including a pipeline and the above-mentioned clamp pipe fitting 10 , wherein the pipeline is accommodated in a gap 700 between the positioning sleeve 200 and the core body 110 .

[0123] The present invention provides a clamp pipe fitting 10 with leak-proof clamping function, and its installation process and working principle are as follows:

[0124] Please refer to Figure 7 , 8 , 12 and 13, the sealing ring 600 is sleeved on the sealing groove 113 of the core body 110. The clamping piece 300 is sleeved from the rear section 243 of the positioning sleeve 200 to the middle section 242 of the positioning sleeve 200. During the sleeve insertion of the clamping piece 300, the second limiting protrusion 260 on the second annular groove 245 is squeezed, and the first long groove 211 and the second long groove 212 shrink inwardly to ensure that the clamping piece 300 can pass through the second limiting protrusion 260.

[0125] When the pressing piece 300 is inserted into the positioning sleeve 200, the pressing piece 300 is rotated so that the positioning groove 313 contacts and positions the second positioning portion 280 on the surface of the positioning sleeve 200, and the first through hole 311 of the pressing piece 300 is aligned with the indicating groove 220 of the positioning sleeve 200. The two axial ends of the pressing piece 300 are respectively limited by the first limiting protrusion 250 and the second limiting protrusion 260, so that the pressing piece 300 is stably fixed on the surface of the positioning sleeve 200.

[0126] The clamping piece 300 and the positioning sleeve 200 are integrally sleeved on the surface of the core body 110, and the inner convex ring 270 of the positioning sleeve 200 cooperates with the connecting groove 111 of the core body 110 to position the positioning sleeve 200 so that the positioning sleeve 200 is fixed on the surface of the core body 110 and is spaced apart from the core body 110, and the gap 700 between the two is used to accommodate the pipeline.

[0127] Since the position where the clamping piece 300 is fixed on the positioning sleeve 200 is located in the middle section 242 of the positioning sleeve 200, and the middle section 242 of the positioning sleeve 200 is arranged corresponding to the crimping sealing section 117 of the core body 110, when the clamping piece 300 applies an inward contraction force, it can ensure that the pipeline and the crimping sealing section 117 are tightly connected to prevent water leakage caused by crimping misalignment.

[0128] The elastic power member 500 is installed in the sink 430 of the indicator 400, the indicator boss 410 passes through the third through hole 521, and the first positioning portion 522 contacts and positions the indicator boss 410 to prevent the elastic power member 500 from being separated from the indicator 400. The elastic power member 500 and the indicator 400 are integrally installed on the surface of the clamping member 300, the elastic power member 500 contacts the outer surface of the clamping member 300, the indicator boss 410 passes through the first through hole 311 and is accommodated in the indicator groove 220, and the indicator protrusion 420 is accommodated in the second through hole 312, so that the pipe body 100, the positioning sleeve 200, the clamping member 300, the indicator 400 and the elastic power member 500 are connected to form an integral clamp pipe 10.

[0129] When the above-mentioned clamp pipe fitting 10 with leak-proof clamping function is applied to a pipeline connection system, the pipeline is accommodated in the gap 700 between the positioning sleeve 200 and the core body 110, and during the pipeline installation process, it can be observed through the observation hole 230 at one end of the first long groove 211 on the positioning sleeve 200 to observe whether the pipeline is inserted into place. Since the first surface 115 on the core body 110 is an inclined surface, it is also convenient for the process of inserting the pipeline into the core body 110.

[0130] After the pipe is inserted into place, the clamping part 320 of the clamping member 300 is clamped with an external tool, and the inner diameter of the clamping member body 310 shrinks, so that the inner diameter of the positioning sleeve 200 inside it shrinks synchronously, and the width of the first long groove 211 and the second long groove 212 on the positioning sleeve 200 is reduced, so that the indicating groove 220 squeezes out the indicating boss 410 contained therein, and the indicating protrusion 420 is also squeezed out from the second through hole 312 due to the shrinkage of the inner diameter of the clamping member 300. Since there is a preset elastic potential energy between the elastic power member 500 and the clamping member 300, that is, in the initial state, the contact between the elastic power member 500 and the clamping member 300 has already caused the elastic power member 500 to deform. When the indicating boss 410 and the indicating protrusion 420 are both squeezed out of the clamping member 300, the elastic potential energy of the elastic power member 500 plays a role, and the indicating member 400 and the elastic power member 500 are ejected as a whole to indicate the operator that the installation is in place.

[0131] If the clamping stroke is not in place, the stroke of the indicating groove 220 to push the indicating boss 410 is insufficient, the indicating boss 410 cannot be completely pushed out, and the indicating protrusion 420 cannot be completely pushed out of the second through hole 312. The elastic power part 500 remains in contact with the clamping part 300, and the indicating part 400 cannot be popped out. The operator needs to re-clamp or continue to clamp until the indicating part 400 and the elastic power part 500 are popped out as a whole.

[0132] The structure is easy to install, and the indication of the crimping end point is obvious. In order to make the indication effect of the crimping end point better, the indicator 400 can also be made of various materials with eye-catching colors. And through structural design, the clamping member 300 corresponds to the crimping sealing section 117 of the core part 110. After crimping, the connection between the pipeline and the crimping sealing section 117 is tighter, avoiding the risk of water leakage, greatly improving the inspection efficiency of operators, saving installation time and reducing installation costs.

[0133] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A clamp pipe fitting with leak-proof clamping function, characterized in that: It includes a pipe body, a positioning sleeve, a clamping part and an indicator part; The pipe body comprises a core part and a stop part, wherein the stop part is located between the two core parts and protrudes from the outer surface of the core part, and one end of the core part close to the stop part is matched and fixed with the positioning sleeve, so that the positioning sleeve is sleeved on the outer surface of the core part and is spaced from the outer surface of the core part, and the gap between the positioning sleeve and the core part is configured to accommodate a pipe; The positioning sleeve is provided with a plurality of press-fit grooves extending along the axial direction of the positioning sleeve, and the press-fit grooves penetrate the inner surface and the outer surface of the positioning sleeve; the press-fit grooves include at least one first long groove, and at least one of the first long grooves is provided with an indicator groove, and the groove width of the indicator groove has a tendency to decrease from the outer surface to the inner surface of the positioning sleeve; The clamping piece is sleeved on the surface of the positioning sleeve, and the clamping piece includes a clamping piece body. A first through hole is opened at a position of the clamping piece body corresponding to the indicating groove; an indicating boss protruding from the inner surface is provided on the inner surface of the indicating piece, and the width of the indicating boss at one end away from the inner surface of the indicating piece tends to increase along the direction approaching the inner surface of the indicating piece, the indicating boss passes through the first through hole of the clamping piece body and is clamped in the indicating groove of the positioning sleeve, and when the positioning sleeve is pressed by the clamping piece, the indicating groove is configured to squeeze out the indicating boss.

2. The clamp pipe fitting according to claim 1, characterized in that: Second through holes are respectively arranged on both sides of the first through hole of the clamping member body, and indicating protrusions with the same protruding direction as the indicating protrusion are respectively arranged on both sides of the indicating boss of the indicating member, and the indicating protrusions are accommodated in the second through holes.

3. The clamp pipe fitting according to claim 2, characterized in that: The raised surface of the indicating raised portion is a frustum of a cone.

4. The clamp pipe fitting according to claim 2, characterized in that: The indicator is in an arc shape.

5. The clamp pipe fitting according to claim 2, characterized in that: One end of the indicating boss close to the inner surface of the indicating member is a columnar structure, and one end away from the inner surface of the indicating member has an inclined surface, and the inclined surface is in contact with the indicating groove.

6. The clamp pipe fitting according to claim 5, characterized in that: There are two inclined surfaces, and the two inclined surfaces are connected by a connecting platform. The connecting platform can be selectively accommodated in the first long groove of the positioning sleeve.

7. The clamp pipe fitting according to any one of claims 2 to 6, characterized in that: It also includes an elastic power part, which includes an elastic power portion and a mounting portion. The elastic power portion is located on both sides of the mounting portion. A third through hole is opened on the mounting portion. A first positioning portion is provided at the edge of the third through hole. The indicating boss of the indicating member passes through the third through hole of the elastic power part and is fixed by the first positioning portion. The elastic power portion can selectively contact the outer surface of the clamping member body.

8. The clamp pipe fitting according to claim 7, characterized in that: The inner surface of the indicating member is provided with a sinking groove for accommodating the elastic power member, and the indicating boss is located in the sinking groove.

9. The clamp pipe fitting according to claim 7, characterized in that: The first positioning portion is a latching tooth, and a plurality of latching teeth are inclined along a central direction of the third through hole.

10. The clamp pipe fitting according to claim 7, characterized in that: The elastic power piece is a metal sheet structure, and the elastic power part is a spring sheet; The elastic power part is made of spring steel or stainless steel.

11. The clamp pipe fitting according to claim 1, characterized in that: The first long groove has an opening at one end of the positioning sleeve close to the blocking portion of the pipe body.

12. The clamp pipe fitting according to claim 11, characterized in that: An observation hole is provided at the open end of at least one of the first long grooves.

13. The clamp pipe fitting according to claim 11, characterized in that: The number of the first long grooves is 2 to 4.

14. The clamp pipe fitting according to claim 11, characterized in that: The press-fit groove further includes a second long groove, and the second long groove has no openings at both ends of the axial direction of the positioning sleeve, and the number of the second long grooves is 1 to 12.

15. The clamp pipe fitting according to any one of claims 11 to 14, characterized in that: The positioning sleeve is axially divided into a front section, a middle section and a rear section, the end of the positioning sleeve connected to the pipe body is located in the rear section, and the middle section is configured to contact the inner surface of the clamping part; the middle section and the front section are connected by a first annular groove, and the middle section and the rear section are connected by a second annular groove, and both the first annular groove and the second annular groove protrude toward the inner surface of the positioning sleeve.

16. The clamp pipe fitting according to claim 15, characterized in that: The outer surface of the first annular groove is provided with a first limiting protrusion, and the outer surface of the second annular groove is provided with a second limiting protrusion. The first limiting protrusion and the second limiting protrusion are configured to axially limit the clamping member.

17. The clamp pipe fitting according to claim 16, characterized in that: The protrusion height of the second limiting protrusion is smaller than the protrusion height of the first limiting protrusion, and both protrude from the outer surface of the middle section.

18. The clamp pipe fitting according to claim 16, characterized in that: The outer diameter of the positioning sleeve at the second limiting protrusion in a free state is greater than or equal to the inner diameter of the clamping piece and greater than or equal to the outer diameter of the positioning sleeve at the second limiting protrusion in a pressed state.

19. The clamp pipe fitting according to claim 15, characterized in that: The wall thicknesses of the first annular groove and the second annular groove are both smaller than the wall thickness of the middle section.

20. The clamp pipe fitting according to claim 15, characterized in that: The indicating groove corresponds to the middle section of the positioning sleeve in the first long groove.

21. The clamp pipe fitting according to claim 15, characterized in that: The indicating groove is a V-shaped groove or an arc-shaped groove.

22. The clamp pipe fitting according to claim 15, characterized in that: The end surface of the rear section of the positioning sleeve is provided with an inner convex ring extending inwardly, and the core part of the pipe body is provided with a connecting groove at one end close to the resisting part, and the inner convex ring is fixedly connected with the connecting groove.

23. The clamp pipe fitting according to any one of claims 16 to 22, characterized in that: The first long groove is provided with a second positioning portion protruding from the outer surface of the positioning sleeve, and the clamping part body is provided with a positioning groove, and the positioning groove cooperates with the second positioning portion for positioning.

24. The clamp pipe fitting according to claim 23, characterized in that: The second positioning portion is composed of protrusions on both sides of the first long groove.

25. The clamp pipe fitting according to claim 23, characterized in that: The indicating groove and the second positioning portion are located on the same first long groove.

26. The clamp pipe fitting according to claim 23, characterized in that: The inner surface of the positioning sleeve is provided with a plurality of positioning protrusions.

27. The clamp pipe fitting according to claim 26, characterized in that: Each of the positioning protrusions extends along the axial direction of the positioning sleeve, and a plurality of the positioning protrusions are arranged along the radial direction of the positioning sleeve.

28. The clamp pipe fitting according to claim 1, characterized in that The clamping piece further includes a clamping portion, which protrudes from an outer surface of the clamping piece body and is configured to change a diameter of the clamping piece body.

29. The clamp pipe fitting according to claim 28, characterized in that: The top surface of the clamping portion is provided with reinforcing ribs.

30. The clamp pipe fitting according to claim 29, characterized in that The reinforcing rib extends along the annular circumferential direction of the clamping piece body.

31. The clamp pipe fitting according to claim 29, characterized in that The reinforcing rib protrudes along the inner surface direction of the clamping piece.

32. The clamp pipe fitting according to claim 1, characterized in that: The core part of the pipe body comprises a crimping sealing section, wherein the crimping sealing section is provided with a plurality of convex teeth and a sealing groove, wherein a sealing ring is accommodated in the sealing groove, and the convex teeth are configured to be in close contact with the pipe.

33. The clamp pipe fitting according to claim 32, characterized in that: One side surface of the protruding tooth is an inclined surface, and the inclined direction of the inclined surface is a direction close to the blocking portion or a direction away from the blocking portion.

34. The clamp pipe fitting according to claim 32, characterized in that: The inclined surfaces of two adjacent convex teeth have inclination directions opposite to each other.

35. The clamp pipe fitting according to claim 32, characterized in that When the inclined directions of the inclined surfaces of two adjacent convex teeth are close to each other, a tooth groove is formed between the two adjacent convex teeth; when the inclined directions of the inclined surfaces of two adjacent convex teeth are away from each other, a sealing groove is formed between the two adjacent convex teeth.

36. The clamp pipe fitting according to claim 32, characterized in that The outer diameter of the sealing ring is smaller than the outer diameter of the sealing groove.

37. The clamp pipe fitting according to any one of claims 32 to 36, characterized in that: The core part of the pipe body also includes an insertion section and a fixing section, wherein the insertion section and the fixing section are respectively arranged on both sides of the crimping sealing section, and the fixing section is located at one end of the core part close to the blocking part.

38. The clamp pipe fitting according to claim 37, characterized in that The inserting section and the fixing section are both provided with a first surface inclined in a direction away from the blocking portion.

39. The clamp pipe fitting according to claim 38, characterized in that The fixing section is provided with two first surfaces spaced apart from each other, so that the fixing section is a step-like structure with outer diameters decreasing successively.

40. A pipeline connection system, characterized in that: It comprises a pipe and a clamp pipe fitting as described in any one of claims 1 to 39, wherein the pipe is accommodated between the positioning sleeve and the core body.

Images