Pipe coupling and pipe system

Abstract

The utility model relates to the technical field of pipe fitting, disclose pipeline connecting pipe fitting and pipeline system. Pipeline connecting pipe fitting, including core, connecting sleeve, tightening sleeve and clamp, tightening sleeve includes the positioning end, force -receiving portion and connecting end that set up in proper order along the axial direction, the outer wall of core is provided with annular clamping slot, tightening sleeve is sleeved in the outside of core, and the positioning end is clamped in annular clamping slot, the direction from connecting end to positioning end is the installation direction, the long slot of a plurality of radial penetrations is set up along the installation direction on tightening sleeve, connecting sleeve is sleeved in the outside of core and is connected with connecting end, and the clamp includes the hoop body and clamping portion of superior arc, and the hoop body is sleeved in the outside of force -receiving portion, the outer diameter of tightening sleeve at the position of positioning end is greater than the outer diameter at the position of force -receiving portion, so that the step surface is formed to the junction of positioning end and force -receiving portion, and the clamp is located between the step surface and connecting sleeve. The pipeline connecting pipe fitting can realize the axial positioning when the clamp is tightened.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings technology, and more specifically, to pipe connection fittings and pipe systems. Background Technology

[0002] Commonly used pipe fittings in the piping industry include crimp-type, quick-connect, flared-end sliding-tight, and compression fittings. However, most common pipe fittings on the market have limited functionality and present some drawbacks and safety hazards. For example, traditional crimp-type fittings lack leak-proof crimping indication, making troubleshooting difficult, time-consuming, and labor-intensive. With externally sealed quick-connect fittings, the insertion depth is not readily visible during installation; it requires pre-measuring the insertion depth and marking the insertion end on the pipe, resulting in low installation efficiency. Flared-end sliding-tight fittings require two steps—flaring and tightening—requiring two sets of installation tools, making installation cumbersome. Compression fittings require tightening nuts during installation, which is extremely inconvenient in areas with limited space, and the nuts tend to loosen after a period of use, posing a risk of leakage.

[0003] Pipe clamps are also used on the market to connect pipes, but they also have some drawbacks. For example, clamps are usually directly fitted onto the pipe and pressed together. The clamps cannot be positioned axially or circumferentially, especially when installing on risers. The clamps are prone to slipping off and may deviate from the sealing area of ​​the core during pressing, which may lead to leakage.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide pipe connection fittings and pipe systems, aiming to improve at least one of the problems mentioned in the background art.

[0006] This utility model is implemented as follows: In a first aspect, this utility model provides a pipe connection fitting, including a core, a connecting sleeve, a tightening sleeve, and a clamp; The tightening sleeve includes a positioning end, a force-bearing part and a connecting end arranged sequentially along the axial direction. The outer wall of the core is provided with an annular groove. The tightening sleeve is sleeved outside the core, and the positioning end is locked in the annular groove. The direction from the connecting end to the positioning end is the installation direction. Multiple radial through-slots are opened on the tightening sleeve along the installation direction. Each slot extends to the end face that penetrates the connecting end. The connecting sleeve is fitted on the outside of the core and snaps into the connecting end. The inner wall of the tightening sleeve and the outer wall of the core form a pipe installation cavity. The clamp includes an arc-shaped clamp body and a clamping part that are connected to each other. The clamp body is sleeved outside the force-bearing part, and the clamp body can be tightened by using a tool to bite the clamping part. The outer diameter of the tightening sleeve at the positioning end is larger than that at the force-bearing part, so that a stepped surface is formed at the junction of the positioning end and the force-bearing part, and the clamp is located between the stepped surface and the connecting sleeve.

[0007] In an optional embodiment, the force-bearing part is provided with a radially penetrating transverse groove near the positioning end, corresponding to the number of long grooves, and each transverse groove is connected to a long groove.

[0008] In an optional embodiment, an observation hole is provided at the positioning end to observe whether the pipe is installed in place during pipe installation.

[0009] In an optional embodiment, the clamping part includes a clamping ear and two force-bearing parts connected to opposite sides of the clamping ear. The two force-bearing parts are connected to opposite ends of the hoop. The distance from the clamping ear to the center of the hoop is greater than the radius of the hoop. The angle between each force-bearing part and the clamping ear is an acute angle or a right angle.

[0010] In an optional embodiment, the clamp assembly further includes an indicator, which is an arc plate shape. The indicator includes a tension part, and an installation port is provided on the indicator. The tension part is disposed in the installation port, and one end of the tension part is connected to the edge of the indicator corresponding to the installation port. The other end of the tension part is provided with a protrusion protruding into the arc of the indicator. The indicator has two states: free state and installed state. In the free state, the opening of the indicator is smaller than the outer wall of the hoop, and the protrusion protrudes from the inner wall of the indicator. In the installed state, the indicator is fastened and clamped to the outer wall of the hoop, the protrusion abuts against the outer wall of the hoop, and the tension part undergoes elastic deformation. When the hoop undergoes deformation with a smaller diameter, the indicator falls off the hoop under the action of the rebound force provided by the tension part.

[0011] In an optional embodiment, there are two mounting ports and two tensioning parts, with the two tensioning parts respectively disposed in the two mounting ports and symmetrically arranged about the center plane of the indicator.

[0012] In an optional embodiment, the side wall of the hoop has two side holes, and the inner side wall of the two ends of the indicator is provided with bosses. The indicator is connected to the hoop by fastening the two bosses into the two side holes respectively. The side wall of the boss is a conical surface. The two side holes are symmetrical about the clamping ear.

[0013] In an optional embodiment, two first slots are respectively provided on the two opposite edges of the connecting end corresponding to the long groove. The two first slots corresponding to each long groove form a connecting groove. The inner wall of the connecting sleeve is provided with inner protruding ribs that match the number of connecting grooves and extend along the axial direction of the connecting sleeve. The connection between the tightening sleeve and the connecting sleeve is achieved by having multiple connecting grooves be engaged with multiple inner protruding ribs one by one.

[0014] In an optional embodiment, the inner wall of the connecting sleeve is provided with a stepped portion, and each inner protruding rib is connected to the stepped portion, or each inner protruding rib is located near the stepped portion; after the multiple connecting grooves are correspondingly engaged with the multiple inner protruding ribs, the end of the tightening sleeve abuts against the stepped portion.

[0015] In an optional embodiment, the clamping lug is provided with at least one reinforcing groove that is recessed inward.

[0016] The end of the inner convex rib away from the step is the first end, and the other end is the last end. The width of the inner convex rib gradually increases from the first end to the middle. Second slots are opened on opposite sides of the area from the middle to the last end. After the first slot is set on the connecting end, the first slot forms a locking foot on the end face of the connecting end. When multiple connecting slots are locked onto the outside of multiple inner protruding ribs one by one, the middle part of the inner protruding rib is locked into the connecting slot, and the locking foot is locked into the second slot.

[0017] In an optional embodiment, an inner convex ring is provided on the inner wall of the end of the positioning end, and the inner diameter of the positioning end at the inner convex ring gradually increases along the installation direction. The core has a protrusion with an outer diameter larger than other parts. The protrusion is provided with a ring-shaped abutment and a ring-shaped convex ring, and a ring groove is formed between the abutment and the convex ring. The inner convex ring has a conical surface, and the outer diameter of the core at the conical surface gradually increases in the installation direction; the inner diameter of the positioning end corresponding to the smallest inner diameter of the inner convex ring is a, and the outer diameter of the core corresponding to the largest outer diameter of the conical surface is b, where a is greater than b.

[0018] In an optional embodiment, the outer wall of the tightening sleeve is provided with a positioning protrusion, and the clamp is provided with a positioning hole. When the clamp is fitted outside the tightening sleeve, the positioning protrusion is embedded in the positioning hole.

[0019] In an optional embodiment, the core includes an inlet section, a sealing mounting section, and a protrusion arranged sequentially. The outer wall of the sealing installation section is provided with multiple ring teeth, each ring tooth being used to engage with the inner wall of the pipe after the pipe is installed into the pipe installation cavity and tightened. Each ring tooth has opposing inclined surfaces and a check surface, and at least one of the ring teeth has an inclined surface facing the inlet section. The sealing installation section is provided with at least one sealing groove, and each sealing groove is provided with a sealing ring. A ring of teeth is provided on each of the opposite sides of the sealing groove, and the check surfaces of the ring teeth on the opposite sides of the sealing groove are arranged opposite to each other. The wire diameter of the sealing ring is 0.05~0.2mm smaller than the depth of the sealing groove.

[0020] Secondly, this utility model provides a pipeline system, including the pipeline connection fittings provided in this utility model embodiment.

[0021] This utility model has the following beneficial effects: The pipe connection fitting provided by this utility model has a simple structure and is easy to use and install. The clamp is sleeved on the stress part and is located between the step surface and the connecting sleeve, which can realize the axial positioning of the clamp. It can effectively avoid water leakage caused by the clamp shifting to the sealing area due to operational errors when tightening the clamp with tools. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the pipe connection fitting provided in an embodiment of this utility model from a first-view perspective; Figure 2 for Figure 1 Sectional view at point AA; Figure 3 A schematic diagram of the pipe connection fitting provided in an embodiment of this utility model from a second perspective; Figure 4 for Figure 3 Sectional view at point BB; Figure 5 This is a schematic diagram of the core structure; Figure 6 This is a schematic diagram of the tightening sleeve structure; Figure 7 A cross-sectional view of the tightening sleeve; Figure 8 This is a schematic diagram of the connecting sleeve. Figure 9 This is a sectional view of the connecting sleeve; Figure 10 This is a structural diagram of the combination of the clamp and the indicator; Figure 11 This is a schematic diagram of the clamp structure; Figure 12 This is a schematic diagram of the indicator.

[0024] Icons: 100 - Pipe connection fittings; 101 - Pipe installation cavity; 110-Clamp; 111-Clamping part; 111a-Clamping ear; 111b-Force-applying part; 111c-Reinforcing groove; 114-Side hole; 115-Clamp body; 116-Positioning hole; 120 - Indicator; 121 - Tension section; 122 - Mounting port; 123 - Protrusion; 124 - Boss; 129 - Connecting beam; 130 - Tightening sleeve; 132 - Connecting end; 132a - End face groove; 132b - Clamping foot; 133 - Positioning end; 133a - Observation hole; 133b - Inner convex ring; 133c - Axial groove; 134 - Long groove; 135 - Horizontal groove; 137 - Connecting groove; 137a - First clamping groove; 138 - Positioning protrusion; 139 - Force-bearing part; 140 - Connecting sleeve; 141 - Inner protruding rib; 141a - First end; 141b - Tail end; 143 - Stepped part; 144 - Second slot; 150 - Core; 151 - Protrusion; 151a - Blocking part; 151b - Convex ring; 151c - Annular groove; 151d - Conical surface; 152 - Inlet section; 153 - Sealing installation section; 154 - Ring tooth; 154a - Inclined surface; 154b - Check surface; 155 - Sealing groove; 156 - Sealing ring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] 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 invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0030] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0031] like Figures 1 to 4 As shown, this utility model embodiment provides a pipe connection fitting 100, including a core 150, a connecting sleeve 140, a tightening sleeve 130, and a clamp 110; like Figures 5 to 7 As shown, the tightening sleeve 130 includes a positioning end 133, a force-bearing part 139 and a connecting end 132 arranged sequentially along the axial direction. The outer wall of the core 150 is provided with an annular groove 151c. The tightening sleeve 130 is sleeved outside the core 150, and the positioning end 133 is engaged in the annular groove 151c. like Figure 4 , Figure 8 and Figure 9 As shown, the direction from the connecting end 132 to the positioning end 133 is the installation direction. Multiple radially penetrating long grooves 134 are opened on the tightening sleeve 130 along the installation direction. Each long groove 134 extends to the end face that penetrates the connecting end 132. The connecting sleeve 140 is fitted on the outside of the core 150 and snapped into the connecting end 132. The inner wall of the tightening sleeve 130 and the outer wall of the core 150 form a pipe installation cavity 101. like Figure 10 and Figure 11 As shown, the clamp 110 includes an arc-shaped clamp body 115 and a clamping part 111 connected to each other. The clamp body 115 is sleeved outside the force-bearing part 139. The clamp body 115 can be tightened by using a tool to bite the clamping part 111.

[0032] The outer diameter of the tightening sleeve 130 at the positioning end 133 is larger than the outer diameter at the force-bearing part 139, so that a stepped surface is formed at the junction of the positioning end 133 and the force-bearing part 139, and the clamp 110 is located between the stepped surface and the connecting sleeve 140.

[0033] The pipe connection fitting 100 provided by this utility model has a simple structure and is easy to use and install. The clamp 115 is sleeved on the force-bearing part 139 and is located between the step surface and the connecting sleeve 140. This setting can realize the axial positioning of the clamp 110 and can effectively avoid water leakage caused by the clamp 110 shifting to the sealing area due to operational errors when tightening the clamp 110 with tools.

[0034] Optionally, such as Figure 4 and Figure 5As shown, the core 150 of the connecting pipe fitting of this utility model can be a plug, a threaded fitting, or a fitting with two or more ends. With the structure shown in the attached drawings of this utility model, if the core 150 has two ends, then the number of sets of the connecting sleeve 140, tightening sleeve 130, and clamp 110 assembly is two. Similarly, if the core 150 has three ends, then the number of sets is three.

[0035] Optionally, the core 150 includes an inlet section 152, a sealing installation section 153, and a protrusion 151 arranged sequentially. The outer wall of the sealing installation section 153 is provided with multiple ring teeth 154. Each ring tooth 154 is used to fit into the inner wall of the pipe after the pipe is installed into the pipe installation cavity 101 and tightened, thereby achieving a seal in the pipe installation.

[0036] Optionally, each ring tooth 154 has opposing inclined surfaces 154a and check surfaces 154b, with at least one of the ring teeth 154 having its inclined surface 154a facing the inlet section 152. The arrangement of the ring teeth 154 effectively prevents the pipe from coming out of the core 150.

[0037] Optionally, the sealing installation section 153 is provided with at least one sealing groove 155, and a sealing ring 156 is provided in each sealing groove 155. A ring of teeth 154 is provided on each opposite side of the sealing groove 155, and the check surfaces 154b of the ring teeth 154 on opposite sides of the sealing groove 155 are arranged opposite each other. After the pipe is compressed, the inner wall of the pipe abuts against the outer wall of the sealing ring 156. The sealing ring 156 further improves the sealing performance of the pipe connection.

[0038] Therefore, the combination of ring teeth 154 and sealing ring 156 enables double sealing during pipe installation.

[0039] It should be noted that the inner diameter of the pipe should be greater than the inlet section 152 of the core 150 and slightly greater than or equal to the sealing installation section 153. The outer diameter of the pipe should be less than the inner diameter of the tightening sleeve 130 to ensure that the inner 200 of the pipe is smoothly inserted into the pipe installation cavity 101.

[0040] Optionally, the wire diameter of the sealing ring 156 is slightly smaller than the groove depth of the sealing ring 156 (0.05~0.2mm smaller). Without proper clamping, a seal cannot be achieved. If the clamping is not performed properly during installation, water will leak out through the gap of the O-ring and then from the pipe port during the water test, which can indicate to the installer that the clamping has not been performed or that the clamping is not in place.

[0041] Optionally, such as Figure 4 , Figure 5 and Figure 7 As shown, an inner convex ring 133b is provided on the inner wall of the end of the positioning end 133. Along the installation direction, the inner diameter of the positioning end 133 at the inner convex ring 133b gradually increases. The core 150 has a protrusion 151 with an outer diameter larger than other parts. The protrusion 151 is provided with an annular abutment 151a and a convex ring 151b. An annular groove 151c is formed between the abutment 151a and the convex ring 151b. The convex ring 151b has a conical surface 151d. In the installation direction, the outer diameter of the core 150 at the conical surface 151d gradually increases. The inner diameter of the connecting sleeve 140 at the point where the inner diameter of the inner convex ring 133b is the smallest is a, and the outer diameter of the core 150 at the point where the outer diameter of the conical surface 151d is the largest is b. a is greater than b.

[0042] The inner diameter of the inner convex ring 133b gradually increases, meaning that the inner wall of the inner convex ring 133b is an annular inclined surface. The conical surface 151d of the convex ring 151b is also an annular inclined surface, which facilitates the smooth sliding of the connecting sleeve 140 into the annular groove 151c under the action of the two annular inclined surfaces during assembly.

[0043] Optionally, the inner convex ring 133b is provided with a plurality of evenly distributed axial grooves 133c. The axial grooves 133c increase the deformation space of the inner convex ring 133b, making it easier for it to be inserted into the annular groove 151c.

[0044] Optionally, such as Figure 6 and Figure 7 As shown, an observation hole 133a is provided at the positioning end 133 near the inner convex ring 133b, which is used to observe whether the pipe is installed in place when installing the pipe.

[0045] Optionally, the width of each long groove 134 gradually increases in the opposite direction to the installation direction. This design of the long groove 134 makes it easier to demold the tightening sleeve 130 during the manufacturing process.

[0046] Optionally, a radially penetrating transverse groove 135 corresponding to the number of long grooves 134 is provided near the positioning end 133, and each transverse groove 135 is connected to a long groove 134 to form a T-shaped groove.

[0047] The horizontal groove 135 increases the deformation space and also reduces the width between the two long grooves 134, making it easier for the tightening sleeve 130 to deform and reduce the diameter to tighten the pipe, thereby increasing the sealing reliability.

[0048] Optionally, such as Figures 6 to 9As shown, the two opposite edges of the connecting end 132 corresponding to the long groove 134 are respectively provided with two first slots 137a. The two first slots 137a corresponding to each long groove 134 form a connecting groove 137. The inner wall of the connecting sleeve 140 is provided with inner protruding ribs 141 that match the number of connecting grooves 137 and extend along the axial direction of the connecting sleeve 140. The connection between the tightening sleeve 130 and the connecting sleeve 140 is achieved by having multiple connecting grooves 137 locked one-to-one with multiple inner protruding ribs 141.

[0049] Optionally, the inner wall of the connecting sleeve 140 is provided with a stepped portion 143, and each inner protruding rib 141 is connected to the stepped portion 143, or each inner protruding rib 141 is provided at a position close to the stepped portion 143; after the multiple connecting grooves 137 are correspondingly engaged with the multiple inner protruding ribs 141, the end of the tightening sleeve 130 abuts against the stepped portion 143.

[0050] Optionally, the end of the inner rib 141 away from the step portion 143 is the first end 141a, and the other end is the last end 141b. The width of the inner rib 141 gradually increases from the first end 141a to the middle. Second slots 144 are opened on opposite sides of the area from the middle to the last end 141b. After the first slot 137a is provided on the connecting end 132, the first slot 137a to the end face of the connecting end 132 forms a locking foot 132b. When the multiple connecting slots 137 are locked one-to-one with the multiple inner protruding ribs 141, the middle part of the inner protruding rib 141 is locked into the connecting slot 137, and the locking foot 132b is locked into the second slot 144.

[0051] The process of connecting the connecting sleeve 140 to the connecting end 132 is as follows: the inner protruding rib 141 aligns with the long groove 134, and its first end 141a first enters the long groove 134. As the inner protruding rib 141 slides into the long groove 134, it is gradually expanded. When the middle part of the inner protruding rib 141 just enters the long groove 134, the long groove 134 is expanded to its maximum. Then it moves, and the inner protruding rib 141 is locked into the connecting groove 137. At this time, the locking foot 132b of the connecting end 132 falls into the second locking groove 144, and the long groove 134 returns to its original size, completing the installation. The specific structural design of the section from the first end 141a to the middle of the inner protruding rib 141 can play an assembly guiding role, making the assembly of the connecting sleeve 140 more convenient.

[0052] Optionally, the connecting end 132 is provided with an end face groove 132a at the position between the two long grooves 134. The end face groove 132a can increase the deformation space of the tightening sleeve 130, making it easier for the connecting end 132 to connect with the connecting sleeve 140.

[0053] Optionally, the outer wall of the tightening sleeve 130 is provided with a positioning protrusion 138, and the clamp 110 is provided with a positioning hole 116. When the clamp 110 is fitted outside the tightening sleeve 130, the positioning protrusion 138 is embedded in the positioning hole 116.

[0054] The positioning protrusion 138 and positioning hole 116 enable the axial and circumferential positioning of the clamp 110, further improving the crimping accuracy of the clamp 110.

[0055] Optionally, such as Figure 10 and Figure 11 As shown, the clamp 110 includes an arc-shaped clamp body 115 and a clamping part 111. The clamping part 111 includes a clamping ear 111a and two force-bearing parts 111b respectively connected to the opposite sides of the clamping ear 111a. The two force-bearing parts 111b are respectively connected to the opposite ends of the clamp body 115. The distance from the clamping ear 111a to the center of the clamp body 115 is greater than the radius of the clamp body 115. The angle between each force-bearing part 111b and the clamping ear 111a is an acute angle or a right angle. The clamp body 115 is sleeved on the outside of the force-bearing part 139.

[0056] The specific structural design of the clamp 110 facilitates the tool pressing and clamping part 111, thereby tightening the clamp body 115.

[0057] Optionally, such as Figures 10 to 12 As shown, the pipe connection fitting 100 also includes an indicator 120; the indicator 120 is an arc plate shape, the indicator 120 includes a tension part 121, the indicator 120 has an installation port 122, the tension part 121 is disposed in the installation port 122, and one end of the tension part 121 is connected to the edge of the indicator 120 corresponding to the installation port 122, and the other end of the tension part 121 is provided with a protrusion 123 protruding towards the inner side of the arc of the indicator 120; The indicator 120 has two states: a free state and an installed state. In the free state, the opening size of the indicator 120 is smaller than the size of the outer wall of the hoop 115, and the protrusion 123 protrudes from the inner wall of the indicator 120. In the installed state, the indicator 120 is fastened and clamped to the outer wall of the hoop 115, the protrusion 123 abuts against the outer wall of the hoop 115, and the tension part 121 undergoes elastic deformation. When the hoop 115 undergoes deformation with a smaller diameter, the indicator 120 falls off the hoop 115 under the action of the rebound force provided by the tension part 121.

[0058] The pipe connection fitting 100 provided in this embodiment of the utility model has a clamp 110 in the shape of a circular metal plate. In use, the clamp 110 is fitted onto the outer wall of the tightening sleeve 130 of the pipe connection fitting 100. Due to the cooperative arrangement of the clamp 110 and the indicator 120, when the clamp body 115 is tightened using a special tool, the indicator 120 no longer clamps the clamp body 115 or the clamping force weakens as the clamp body 115 deforms to a smaller diameter. Under the abutment of the protrusion 123 and the tension ring overcoming the deformation, the indicator 120 detaches from the outer wall of the clamp body 115. Workers can determine whether the installation is complete by whether the indicator 120 has detached. The clamp 110 assembly provided by this utility model has a simple structure, is easy to use, and is applicable to most pipe connection fittings 100. The indicator 120 detachment is clearly visible, the appearance of the clamp 110 assembly changes significantly before and after installation, and the accuracy of indicating whether the installation is complete is high.

[0059] Alternatively, the indicator 120 may be made of an engineering injection molded material with a low coefficient of friction, high elasticity, and bright colors, such as POM.

[0060] Furthermore, there are two mounting ports 122 and two tensioning parts 121. The two tensioning parts 121 are respectively disposed in the two mounting ports 122, and the two tensioning parts 121 are symmetrically arranged about the center face of the indicator 120.

[0061] The symmetrical arrangement of the two sets of tension sections 121 can make the abutment force received by the clamp 110 more balanced, thereby making the timing of the indicator 120 falling off more accurate.

[0062] Furthermore, the two mounting ports 122 are isolated by a connecting beam 129.

[0063] Optionally, the side wall of the hoop 115 is provided with two side holes 114, and the inner side wall of the two ends of the indicator 120 is provided with bosses 124. The indicator 120 is connected to the hoop 115 by the two bosses 124 respectively fastening into the two side holes 114, so that the indicator 120 is not easy to come off the clamp 110 during transportation and storage.

[0064] Optionally, the two side holes 114 are symmetrical about the clamping lug 111a.

[0065] Optionally, the sidewall of the boss 124 is a conical surface 151d, so that the indicator 120 can be easily detached when the clamping clamp 110 is installed.

[0066] Furthermore, the clamp 111a is provided with at least one reinforcing groove 111c that is recessed inward.

[0067] The reinforcement rib 111c can increase the strength of the top of the clamp 111a and prevent the top of the clamp 111a from being bent or deformed.

[0068] The assembly process of the pipe connection fitting 100 provided in this embodiment of the utility model is as follows: (1) Fit the sealing ring 156 into the sealing groove 155 of the core 150; (2) Place the clamp 110 axially onto the tightening sleeve 130, press the outer diameter of the tightening sleeve 130 lightly to make it radially shrink, and at the same time adjust the position and angle of the clamp 110 so that the protrusion 123 on the tightening sleeve 130 is inserted into the positioning hole 116 of the clamp 110. (3) Press the connecting end 132 of the above-mentioned assembly component tightening sleeve 130 axially into the connecting sleeve 140. Specifically, during assembly, first align the position of the long groove 134 of the tightening sleeve 130 roughly with the first end 141a of the inner protrusion rib 141 of the connecting sleeve 140, and then press so that the end face of the tightening sleeve 130 abuts against the step portion 143 of the connecting sleeve 140, and the inner protrusion rib 141 of the connecting sleeve 140 is inserted into the connecting groove 137 of the tightening sleeve 130 to prevent it from falling off.

[0069] (4) The indicator 120 is radially fitted onto the clamp 110 of the above-mentioned assembly assembly, so that the protrusions 124 on both sides of the indicator 120 are inserted into the side holes 114 on both sides of the clamp 110. At this time, the protrusions 123 of the indicator 120 abut against the outer surface of the clamp 110, causing the tension part 121 to deform and store energy.

[0070] (5) Press the assembled component positioning end 133 into the core 150 so that the inner convex ring 133b is inserted into the annular groove 151c of the core 150 to prevent it from coming off.

[0071] Installation and usage process: (1) After cutting the pipe, chamfer and round the pipe ends; (2) After the pipe end is chamfered, the pipe end is fitted into the core 150 through the pipe installation cavity 101 of the pipe connection fitting 100 and inserted to the bottom of the positioning end 133. The pipe end can be observed through the observation hole 133a of the positioning end 133 to determine whether the pipe is inserted to the bottom.

[0072] (3) Use a clamping tool to clamp the clamping part 111 of the clamp 110 to deform and shrink it. At this time, the inner diameter of the clamp 110 shrinks and squeezes the tightening sleeve 130 to shrink it radially. The inner circle of the tightening sleeve 130 squeezes the outer circle of the pipe to shrink the diameter of the pipe, so that the inner wall of the pipe is pressed against the sealing ring 156 of the core 150 to form a seal. At the same time, the multiple ring teeth 154 of the core 150 will be embedded in the inner wall of the pipe to prevent the pipe fitting from separating from the pipe, and also play a certain sealing role.

[0073] During the clamping process, due to the radial contraction and deformation of the clamp 110, the protrusions 124 on both sides of the indicator 120 will slide out of the holes 114 on both sides of the clamp 110. When the sliding distance reaches the critical point, the tension part 121 of the indicator 120 will release elastic potential energy, popping the indicator 120 out. This facilitates the installer's identification of whether the pipe fitting has been clamped properly, avoiding any missed clamping, thus achieving the product's anti-leakage crimping function.

[0074] If the clamping stroke is not complete during clamping, i.e. the radial shrinkage deformation of the clamp 110 is insufficient, the sliding stroke of the bosses 124 on both sides of the indicator 120 is insufficient, and the tension part 121 of the indicator 120 cannot be triggered to release the elastic potential energy. In this case, the indicator 120 cannot be ejected, thus prompting the operator to complete the clamping again.

[0075] (4) After all pipe fittings and joints are installed and crimped, it is necessary to observe whether each connection point has been crimped properly and to conduct a water test to check the pipeline system. If the above steps are not crimped properly or not crimped in place, water will flow out through the gap of the O-ring and then leak from the pipe port during the water test. This can prompt the installer to complete the crimping and achieve a double anti-leakage crimping prompt function.

[0076] In summary, the pipe connection fitting 100 provided by this utility model can be used for connection and maintenance in water supply, drainage, heating and other pipeline systems. The clamp 115 is sleeved on the force-bearing part 139, and its position between the stepped surface and the connecting sleeve 140 enables axial positioning of the clamp 110, effectively preventing leakage caused by the clamp 110 shifting off the sealing area due to operational errors when tightening the clamp 110 with tools. In the preferred embodiment, the brightly colored indicator 120 automatically pops out and falls off during installation and compression, resulting in a significant change in appearance before and after installation and making the indicator highly visible. In the preferred embodiment, the anti-leakage compression indication is obvious, and the dual anti-leakage compression function with leakage indication facilitates the inspection by installers, eliminates safety hazards, greatly improves the inspection efficiency of plumbers, saves installation time and reduces installation costs.

[0077] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pipe connection fitting, characterized in that, Includes core, connecting sleeve, tightening sleeve and clamp; The tightening sleeve includes a positioning end, a force-bearing part and a connecting end arranged sequentially along the axial direction. The outer wall of the core is provided with an annular groove. The tightening sleeve is sleeved outside the core, and the positioning end is engaged in the annular groove. The direction from the connecting end to the positioning end is the installation direction. Multiple radially penetrating long grooves are opened on the tightening sleeve along the installation direction. Each long groove extends to the end face that penetrates the connecting end. The connecting sleeve is sleeved on the core body and snaps into the connecting end. The inner wall of the tightening sleeve and the outer wall of the core body form a tube installation cavity. The clamp includes an arc-shaped clamp body and a clamping part that are connected to each other. The clamp body is sleeved outside the force-bearing part, and the clamp body can be tightened by using a tool to bite the clamping part. The outer diameter of the tightening sleeve at the positioning end is larger than the outer diameter at the force-bearing part, so that a stepped surface is formed at the junction of the positioning end and the force-bearing part, and the clamp is located between the stepped surface and the connecting sleeve.

2. The pipe fitting according to claim 1, characterized in that, Includes at least one of the following features (1) to (3): (1) The force-bearing part is provided with a radially penetrating transverse groove near the positioning end, corresponding to the number of the long grooves, and each transverse groove is connected to one of the long grooves; (2) The positioning end is provided with an observation hole, which is used to observe whether the pipe is installed in place when the pipe is installed; (3) The clamping part includes a clamping ear and two force-bearing parts connected to the opposite sides of the clamping ear respectively. The two force-bearing parts are connected to the opposite ends of the hoop respectively. The distance from the clamping ear to the center of the hoop is greater than the radius of the hoop. The angle between each force-bearing part and the clamping ear is an acute angle or a right angle.

3. The pipe fitting according to claim 1, characterized in that, The clamp assembly also includes an indicator, which is an arc plate shape. The indicator includes a tension part and has an installation port. The tension part is disposed in the installation port, and one end of the tension part is connected to the edge of the indicator corresponding to the installation port. The other end of the tension part is provided with a protrusion that protrudes into the arc of the indicator. The indicator has two states: a free state and an installed state. In the free state, the opening of the indicator is smaller than the outer wall of the hoop, and the protrusion protrudes from the inner wall of the indicator. In the installed state, the indicator is fastened and clamped to the outer wall of the hoop, the protrusion abuts against the outer wall of the hoop, the tension part undergoes elastic deformation, and when the hoop undergoes deformation with a smaller diameter, the indicator falls off the hoop under the action of the rebound force provided by the tension part.

4. The pipe fitting according to claim 3, characterized in that, The number of mounting ports is two, and the number of tensioning parts is two. The two tensioning parts are respectively disposed in the two mounting ports, and the two tensioning parts are symmetrically arranged about the center face of the indicator.

5. The pipe connection fitting according to claim 3, characterized in that, The hoop has two side holes on its side wall, and the inner side walls of the two ends of the indicator are provided with bosses. The indicator is connected to the hoop by the two bosses respectively fastening into the two side holes; the side wall of the boss is a conical surface.

6. The pipe connection fitting according to claim 1, characterized in that, The connecting end is provided with two first slots at the two opposite edges of the long groove. The two first slots corresponding to each long groove form a connecting groove. The inner wall of the connecting sleeve is provided with inner protruding ribs that match the number of connecting grooves and extend along the axial direction of the connecting sleeve. The connection between the tightening sleeve and the connecting sleeve is achieved by having multiple connecting grooves be engaged with multiple inner protruding ribs one by one.

7. The pipe fitting according to claim 6, characterized in that, Includes at least one of the following features (1) and (2): (1) The inner wall of the connecting sleeve is provided with a stepped portion, and each of the inner protruding ribs is connected to the stepped portion, or each of the inner protruding ribs is provided at a position close to the stepped portion; After the multiple connecting slots are fitted one-to-one with the multiple inner protruding ribs, the end of the tightening sleeve abuts against the step portion; (2) The end of the inner rib away from the step is the first end and the other end is the tail end. The width of the inner rib gradually increases from the first end to the middle. A second slot is opened on both sides of the area from the middle to the tail end. After the first slot is provided on the connecting end, the first slot forms a locking foot on the end face of the connecting end. When the multiple connecting slots are correspondingly locked to the outside of the multiple inner protruding ribs, the middle part of the inner protruding rib is locked into the connecting slot, and the locking foot is locked into the second slot.

8. The pipe fitting according to claim 1, characterized in that, Includes at least one of the following features (1) and (2): (1) The inner wall of the end of the positioning end is provided with an inner convex ring, and the inner diameter of the positioning end at the inner convex ring gradually increases along the installation direction. The core has a protrusion with an outer diameter larger than other parts. The protrusion is provided with an annular abutment and a convex ring, and the annular groove is formed between the abutment and the convex ring. The inner convex ring has a conical surface, and the outer diameter of the core at the conical surface gradually increases in the installation direction; the inner diameter of the positioning end corresponding to the smallest inner diameter of the inner convex ring is a, and the outer diameter of the core corresponding to the largest outer diameter of the conical surface is b, where a is greater than b. (2) The outer wall of the tightening sleeve is provided with a positioning protrusion, and the clamp is provided with a positioning hole. When the clamp is fitted outside the tightening sleeve, the positioning protrusion is embedded in the positioning hole.

9. The pipe fitting according to claim 4, characterized in that, The core includes an inlet section, a sealing mounting section, and a protrusion arranged sequentially. The outer wall of the sealing installation section is provided with multiple ring teeth, each of which is used to engage with the inner wall of the pipe after the pipe is installed into the pipe installation cavity and fastened. Each of the ring teeth has opposite inclined surfaces and a check surface, and at least one of the ring teeth has an inclined surface facing the inlet section; The sealing installation section is provided with at least one sealing groove, and a sealing ring is provided in each sealing groove. A ring of teeth is provided on each of the opposite sides of the sealing groove, and the check surfaces of the ring teeth on the opposite sides of the sealing groove are arranged opposite to each other. The diameter of the sealing ring is 0.05~0.2mm smaller than the depth of the sealing groove.

10. A piping system, characterized in that, Includes the pipe connection fittings as described in any one of claims 1 to 9.

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