Hoop assembly, pipe coupling and pipe system

Abstract

The utility model relates to the technical field of pipe fittings, disclose hoop assembly, pipeline connecting pipe fitting and pipeline system. Hoop assembly, including hoop and indicator, hoop includes clamping portion and superior arc hoop body, clamping portion includes clamping lug and two force parts connected with the opposite sides of clamping lug respectively, two force parts are connected with the opposite ends of hoop body respectively, the indicator is arc plate shape, and the indicator includes tension part, and the installation mouth is seted up on the indicator, and the tension part sets up in the installation mouth, and its one end is connected with the edge of the indicator corresponding to the installation mouth, and the other end of tension part is provided with the convex, in the installation state, the outer wall of hoop body is buckled and clamped by the indicator, the convex is abutted on the outer wall of hoop body, and the tension part occurs elastic deformation, and after the hoop body occurs the deformation that the diameter becomes small, the indicator falls from the hoop body under the action of the resilience provided by the tension part. The appearance change of this hoop assembly is big before and after installation, and the indication is eye-catching.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings technology, and more specifically, to clamp assemblies, 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, where they are prone to slipping off. During pressing, they can easily deviate from the core sealing area, posing a risk of leakage. In addition, commercially available clamps have limited functionality and lack anti-leakage pressing features. The appearance before and after installation is similar, making it easy to miss the pressing point and cause pipe leaks. Furthermore, since there are no visual indicators during the pressing process, it is difficult to determine when the pressing is complete.

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

[0005] The purpose of this invention is to provide clamp components, 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, the present invention provides a clamp assembly, including a clamp and an indicator; The clamp includes a clamping part and a curved clamp body; The clamping part includes a clamping ear and two force-bearing parts connected to the opposite sides of the clamping ear. The two force-bearing parts are connected to the 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. The indicator is an arc plate shape. The indicator includes a tension part and has a mounting port. The tension part is located in the mounting port and one end of it is connected to the edge of the indicator corresponding to the mounting port. The other end of the tension part has 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, 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.

[0007] In an optional implementation, at least one of the following features (1) and (2) is included: (1) There are two mounting ports and two tensioning parts. The two tensioning parts are respectively set in the two mounting ports and are symmetrically arranged about the center face of the indicator. (2) At least one reinforcing groove is provided on the clamp ear, which is recessed inward.

[0008] 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 the two bosses being fastened into the two side holes respectively. Optionally, the sidewalls of the boss are conical surfaces; Optionally, the two side holes are symmetrical about the clamping lugs.

[0009] Secondly, this utility model provides a pipe connection fitting, including a core, a positioning sleeve, a tightening sleeve, and a clamp assembly as described in any of the foregoing embodiments; The outer wall of the core is provided with an annular groove, and the positioning sleeve is fitted outside the core, with one end of it being engaged in the annular groove. The two opposite ends of the tightening sleeve are the installation end and the inlet end, respectively. The direction from the inlet end to the installation end is the installation direction. Multiple slits are opened on the tightening sleeve along the installation direction. Each slit extends to the end face that penetrates the installation end. The tightening sleeve is fitted outside the core body, and the installation end is locked inside the positioning sleeve. The inner wall of the tightening sleeve and the outer wall of the core body form the pipe installation cavity. The clamp sleeve is located outside the tightening sleeve.

[0010] In an optional implementation, at least one of the following features (1) to (3) is included: (1) The width of each slit gradually increases along the installation direction; (2) A transverse groove corresponding to the number of slits is provided near the entrance end, and each transverse groove is connected to a slit to form a cross-shaped structure; (3) Multiple small protrusions are provided on the inner wall of the tightening sleeve near the installation end, and the end face of each small protrusion near the inlet end is a beveled end face; the inner diameter of the tightening sleeve becomes smaller and smaller along the installation direction at the beveled end face; Optionally, the number of small raised strips is even, and they are set in pairs opposite each other.

[0011] In an optional embodiment, two first slots are respectively provided on the two opposite edges of the slit at the mounting end. The two first slots corresponding to each slit form a connecting groove. The inner wall of the positioning sleeve is provided with an inner protruding rib that extends along the axial direction of the positioning sleeve and matches the number of connecting grooves. The connection between the tightening sleeve and the positioning sleeve is achieved by having multiple connecting grooves be engaged with multiple inner protruding ribs one by one.

[0012] In an optional implementation, at least one of the following features (1) to (3) is included: (1) An end face groove is provided at the position between the two slits at the installation end, and an observation hole corresponding to the end face groove is provided on the positioning sleeve, so as to observe whether the pipe is installed in place through the observation hole and the end face groove when installing the pipe; (2) The inner wall of the positioning sleeve is provided with a stepped part, each inner rib is connected to the stepped part, or each inner rib is located near the stepped part; after multiple connecting grooves are locked to the outside of multiple inner ribs, the end of the tightening sleeve abuts against the stepped part. (3) The end of the inner rib closest to the tightening sleeve 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. Second slots are opened on the opposite sides of the area from the middle to the tail end. After the first slot is set on the mounting end, the end face of the first slot to the mounting end forms a locking foot. 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.

[0013] In an optional implementation, at least one of the following features (1) and (2) is included: (1) The inner wall of the end of the positioning sleeve that is used to be clamped on the core is provided with an inner convex ring. Along the installation direction, the inner diameter of the positioning sleeve at the inner convex ring gradually increases. 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 sleeve at the position with the smallest inner diameter corresponding to the inner convex ring is a, and the outer diameter of the core at the position with the largest outer diameter corresponding to 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.

[0014] 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. Optionally, each ring tooth has opposite inclined surfaces and a check surface, and at least one of the ring teeth has an inclined surface facing the inlet section. Optionally, at least one sealing groove is provided on the sealing installation section, 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. Optionally, the wire diameter of the sealing ring is 0.05~0.2mm smaller than the depth of the sealing groove.

[0015] Thirdly, this utility model provides a pipeline system, including pipeline connection fittings as described in any of the foregoing embodiments.

[0016] This utility model has the following beneficial effects: The clamp assembly provided by this utility model has a simple structure, is easy to use, and is applicable to most pipe connection fittings. The indicator is conspicuous when it falls off, the appearance of the clamp assembly changes significantly before and after installation, and the accuracy of indicating whether the installation is complete is high.

[0017] The pipe fittings provided by this utility model can be used for connection and maintenance in water supply, drainage, heating and other piping systems. This utility model is easy and lightweight to install and press; the indicator automatically pops out during installation and pressing, resulting in a significant change in appearance before and after installation, and the indicator is clearly visible. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the clamp assembly provided in an embodiment of the present utility model; Figure 2 for Figure 1 Schematic diagram of the middle clamp; Figure 3 for Figure 2 A schematic diagram of the structure of the indicator; Figure 4 A schematic diagram of the pipe connection fitting provided in an embodiment of this utility model from a first-view perspective; Figure 5 for Figure 4 Cross-sectional view of the C-plane; Figure 6 A schematic diagram of the pipe connection fitting provided in an embodiment of this utility model from a second perspective; Figure 7 for Figure 6 Cross-sectional view of the C-plane; Figure 8 A schematic diagram of the structure after the pipe is connected to the pipe connection fitting provided in this embodiment of the utility model; Figure 9 This is a schematic diagram of the core structure; Figure 10 This is a schematic diagram of the positioning sleeve. Figure 11 This is a schematic diagram of the cross-section of the positioning sleeve; Figure 12 This is a schematic diagram of the tightening sleeve.

[0020] 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 - Mounting end; 132a - End face groove; 132b - Clamping foot; 133 - Inlet end; 134 - Slit; 135 - Horizontal groove; 137 - Connecting groove; 137a - First clamping groove; 138 - Positioning protrusion; 139 - Small protrusion; 139a - Beveled end face; 140 - Positioning sleeve; 141 - Inner convex rib; 141a - First end; 141b - Tail end; 142 - Observation hole; 143 - Stepped part; 144 - Second slot; 145 - Inner convex ring; 146 - Axial groove; 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 valve surface; 155 - Sealing groove; 156 - Sealing ring; 200 - Pipe material. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0026] 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.

[0027] like Figures 1 to 3 As shown, this utility model embodiment provides a clamp 110 assembly, including a clamp 110 and an indicator 120; The clamp 110 includes a clamping part 111 and an arc-shaped clamp body 115; 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 hoop 115. The distance from the clamping ear 111a to the center of the hoop 115 is greater than the radius of the hoop 115. The angle between each force-bearing part 111b and the clamping ear 111a is an acute angle or a right angle. The indicator 120 is an arc plate shape. The indicator 120 includes a tension part 121 and a mounting port 122. The tension part 121 is disposed in the mounting port 122, and one end of it is connected to the edge of the indicator 120 corresponding to the mounting port 122. The other end of the tension part 121 is provided with a protrusion 123 protruding into 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.

[0028] The clamp 110 assembly provided in this embodiment is 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 coordinated 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 in this invention has a simple structure, is easy to use, and is applicable to most pipe connection fittings 100. The indicator 120 is clearly visible when it detaches, 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Furthermore, the two mounting ports 122 are isolated by a connecting beam 129.

[0033] 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.

[0034] Optionally, the two side holes 114 are symmetrical about the clamping lug 111a.

[0035] Optionally, the sidewall of the boss 124 is a conical surface to facilitate the sliding out of the indicator 120 when the clamping clamp 110 is installed, so that it can be easily detached.

[0036] Furthermore, the clamp 111a is provided with at least one reinforcing groove 111c that is recessed inward.

[0037] 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.

[0038] like Figures 4 to 8 This utility model embodiment also provides a pipe connection fitting 100, including a core 150, a positioning sleeve 140, a tightening sleeve 130, and a clamp 110 assembly provided in this utility model embodiment; The outer wall of the core 150 is provided with an annular groove 151c, and the positioning sleeve 140 is sleeved outside the core 150, with one end of it being locked in the annular groove 151c. The two opposite ends of the tightening sleeve 130 are the mounting end 132 and the inlet end 133, respectively. The direction from the inlet end 133 to the mounting end 132 is the mounting direction. Multiple slits 134 are opened on the tightening sleeve 130 along the mounting direction. Each slit 134 extends to the end face that penetrates the mounting end 132. The tightening sleeve 130 is sleeved on the outside of the core 150, and the mounting end 132 is locked in the positioning sleeve 140. The inner wall of the tightening sleeve 130 and the outer wall of the core 150 form the pipe mounting cavity 101. The clamp 110 is fitted outside the tightening sleeve 130.

[0039] The method of using the pipe connection fitting 100 is as follows: insert the pipe 200 to be installed into the pipe installation cavity 101 and press it against the positioning sleeve 140. Then, use a special tool to tighten the clamping part 111, so that the diameter of the clamp 115 becomes smaller, thereby causing the tightening sleeve 130 to deform and hold the pipe 200 located in the pipe installation cavity 101 tightly. When the diameter of the clamp 115 becomes smaller and the indicator 120 falls off, the installation is completed.

[0040] The pipe connection fitting 100 provided by this utility model has a simple structure and is easy to use and install. In particular, the clamp 110 component is applied therein, which can easily indicate whether the installation is complete.

[0041] Optionally, 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 positioning sleeve 140, tightening sleeve 130, and clamp 110 components is two. Similarly, if the core 150 has three ends, then the number of sets is three.

[0042] Optionally, such as Figure 7 and Figure 9 As shown, 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 200 after the pipe 200 is installed into the pipe installation cavity 101 and is tightened, thereby achieving a seal for the installation of the pipe 200.

[0043] 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 200 from coming out of the core 150.

[0044] 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 200 is compressed, the inner wall of the pipe 200 abuts against the outer wall of the sealing ring 156. The sealing ring 156 further improves the sealing performance of the pipe 200 connection.

[0045] Therefore, the combination of ring teeth 154 and sealing ring 156 enables double sealing during pipe installation 200.

[0046] It should be noted that the inner diameter of the pipe 200 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 200 should be less than the inner diameter of the tightening sleeve 130 to ensure that the pipe 200 is smoothly inserted into the pipe installation cavity 101.

[0047] 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 200 port of the pipe during the water test. This can indicate to the installer that the clamping has not been performed or that the clamping is not in place.

[0048] Optionally, such as Figure 7 , Figure 10 and Figure 11 As shown, the inner wall of the positioning sleeve 140, which is used to be engaged with the core 150, is provided with an inner convex ring 145. Along the installation direction, the inner diameter of the positioning sleeve 140 at the inner convex ring 145 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 positioning sleeve 140 at the position with the smallest inner diameter corresponding to the inner convex ring 145 is a, and the outer diameter of the core 150 at the position with the largest outer diameter corresponding to the conical surface 151d is b. a is greater than b.

[0049] The inner diameter of the inner convex ring 145 gradually increases, meaning that the inner wall of the inner convex ring 145 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 positioning sleeve 140 into the annular groove 151c under the action of the two annular inclined surfaces during assembly.

[0050] Optionally, the inner convex ring 145 is provided with a plurality of evenly distributed axial grooves 146. The axial grooves 146 increase the deformation space of the inner convex ring 145, making it easier for it to be inserted into the annular groove 151c.

[0051] Optionally, the inner wall of the positioning 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.

[0052] Optionally, the end of the inner rib 141 near the tightening sleeve 130 is the first end 141a, and the other end is the tail 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 tail end 141b. After the first slot 137a is provided on the mounting end 132, the first slot 137a forms a locking foot 132b on the end face of the mounting end 132. When the multiple connecting slots 137 are locked onto the multiple inner protruding ribs 141 one by one, 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.

[0053] The process of installing the mounting end 132 to the inner rib 141 is as follows: the slit 134 is aligned with the first end 141a of the inner rib 141, and the locking foot 132b slides in along the inner rib 141 from the first end 141a to the last end 141b. During this process, the slit 134 is gradually expanded, reaching its maximum size after reaching the middle. Then it moves, and the locking foot 132b falls into the second locking groove 144. At this time, the slit 134 returns to its original size, and the installation is complete. The specific structural design of the section from the first end 141a to the middle of the inner rib 141 serves as an assembly guide, making the assembly of the tightening sleeve 130 more convenient.

[0054] Optionally, such as Figure 7 and Figure 12As shown, the width of each slit 134 gradually increases along the installation direction. This design of the slit 134 makes it easier to demold the tightening sleeve 130 during the manufacturing process.

[0055] Optionally, a transverse groove 135 corresponding to the number of slits 134 is provided near the entrance end 133, and each transverse groove 135 is connected to a slit 134 to form a cross-shaped structure.

[0056] The transverse groove 135 reduces the width between the two slits 134, making it easier for the tightening sleeve 130 to deform and reduce its diameter to tighten the pipe 200, thereby increasing the reliability of the seal.

[0057] Optionally, the mounting end 132 is provided with two first slots 137a at the two opposite edges of the slit 134. The two first slots 137a corresponding to each slit 134 form a connecting groove 137. The inner wall of the positioning 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 positioning sleeve 140. The connection between the tightening sleeve 130 and the positioning sleeve 140 is achieved by having multiple connecting grooves 137 locked one-to-one with the multiple inner protruding ribs 141.

[0058] Optionally, the mounting end 132 has an end face groove 132a located between the two slits 134, and the positioning sleeve 140 has an observation hole 142 corresponding to the end face groove 132a. This allows for observation of whether the pipe 200 is properly installed during installation, through the observation hole 142 and the end face groove 132a. Preferably, the length and width of the end face groove 132a are both greater than the observation hole 142, facilitating better observation of the pipe 200's installation status through the observation hole 142.

[0059] Optionally, a plurality of small protrusions 139 are provided on the inner wall of the tightening sleeve 130 near the mounting end 132, and the end face of each small protrusion 139 near the inlet end 133 is a beveled end face 139a; at the beveled end face 139a, the inner diameter of the tightening sleeve 130 gradually decreases along the mounting direction.

[0060] The distance from the small protrusion 139 to the axis is x, and the outer radius of the pipe 200 is y. If the pipe is selected with y greater than x, the pipe can be tightened more when it is about to be inserted to the bottom due to the setting of the small protrusion 139 and its inclined end face 139a. This can increase the friction between the inner wall of the tightening sleeve 130 and the outer wall of the pipe, and better prevent the pipe from coming out.

[0061] Furthermore, the number of small protrusions 139 is even, and the multiple small protrusions 139 are evenly distributed and arranged in pairs opposite each other. This arrangement can further tighten the pipe and further prevent the pipe from coming out.

[0062] 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.

[0063] 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.

[0064] 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 one end of the mounting end 132 of the above-mentioned assembly component tightening sleeve 130 axially into the positioning sleeve 140. Specifically, during assembly, first align the position of the slit 134 of the mounting section of the tightening sleeve 130 roughly with the first end 141a of the inner protruding rib 141 of the positioning sleeve 140, and then press so that the end face of the tightening sleeve 130 abuts against the step portion 143 of the positioning sleeve 140, and the inner protruding rib 141 of the positioning sleeve 140 is inserted into the connecting groove 137 of the tightening sleeve 130 to prevent it from falling off.

[0065] (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.

[0066] (5) Press the assembled component positioning sleeve 140 end into the core 150 so that the inner protruding ring 145 of the positioning sleeve 140 is engaged in the annular groove 151c of the core 150 to prevent it from coming off.

[0067] Installation and usage process: (1) After cutting the pipe 200, chamfer and round the end of the pipe 200; (2) After the chamfering is completed, the end of the pipe 200 is put into the core 150 through the pipe installation cavity 101 of the pipe connection fitting 100 and inserted into the bottom of the positioning sleeve 140. The end of the pipe 200 can be observed through the observation hole 142 of the positioning sleeve 140 to determine whether the pipe is inserted to the bottom.

[0068] (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 200 to shrink the diameter of the pipe 200, so that the inner wall of the pipe 200 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 200 to prevent the pipe fitting from separating from the pipe 200, and also play a certain sealing role.

[0069] 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.

[0070] 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.

[0071] (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 200 port of the pipe during the water test. This can prompt the installer to complete the crimping and achieve a double anti-leakage crimping prompt function.

[0072] In summary, the pipe fitting 100 provided by this utility model can be used for connection and maintenance in water supply, drainage, heating, and other piping systems. This utility model offers labor-saving and lightweight installation and clamping. During installation and clamping, a brightly colored indicator 120 automatically pops out and detaches, resulting in a significant change in appearance before and after installation, and providing highly visible indication. In the preferred embodiment, the leak-proof clamping indication is clear, and the dual leak-proof clamping function with leakage indication facilitates troubleshooting by installers, eliminates safety hazards, greatly improves the efficiency of plumbers' inspections, saves installation time, and reduces installation costs.

[0073] 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 clamp assembly, characterized in that, Includes clamps and indicators; The clamp includes a clamping part and an arc-shaped clamp body; 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. The indicator is an arc plate shape. The indicator includes a tension part and has a mounting port. The tension part is disposed in the mounting port and one end of it is connected to the edge of the indicator corresponding to the mounting 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, and the tension part undergoes elastic deformation. When the hoop undergoes deformation that reduces its diameter, the indicator falls off the hoop under the action of the rebound force provided by the tension part.

2. The clamp assembly according to claim 1, characterized in that, Includes at least one of the following features (1) and (2): (1) The number of mounting ports is two, the number of tension parts is two, the two tension parts are respectively disposed in the two mounting ports, and the two tension parts are symmetrically disposed about the center face of the indicator; (2) The clamping ear is provided with at least one reinforcing groove rib that is recessed inward.

3. The clamp assembly according to claim 1, 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 sidewall of the boss is a conical surface; The two side holes are symmetrical about the clamping lugs.

4. A pipe connection fitting, characterized in that, Includes a core, a positioning sleeve, a tightening sleeve, and a clamp assembly as described in any one of claims 1 to 3; The outer wall of the core is provided with an annular groove, and the positioning sleeve is sleeved outside the core, with one end of it being engaged in the annular groove. The two opposite ends of the tightening sleeve are the mounting end and the inlet end, respectively. The direction from the inlet end to the mounting end is the mounting direction. Multiple slits are opened on the tightening sleeve along the mounting direction. Each slit extends to the end face that penetrates the mounting end. The tightening sleeve is sleeved on the core body, and the mounting end is locked in the positioning sleeve. The inner wall of the tightening sleeve and the outer wall of the core body form a pipe mounting cavity. The clamp is fitted outside the tightening sleeve.

5. The pipe fitting according to claim 4, characterized in that, Includes at least one of the following features (1) to (3): (1) The width of each slit gradually increases along the installation direction; (2) A transverse groove corresponding to the number of slits is provided near the entrance end, and each transverse groove is connected to one of the slits to form a cross-shaped structure; (3) A plurality of small protrusions are provided on the inner wall of the tightening sleeve near the mounting end, and the end face of each small protrusion near the inlet end is a beveled end face; the inner diameter of the tightening sleeve becomes smaller and smaller along the mounting direction at the beveled end face. The number of the small protrusions is an even number, and they are arranged in pairs opposite each other.

6. The pipe fitting according to claim 4, characterized in that, The mounting end is provided with two first slots at the two opposite edges of the slit, and the two first slots corresponding to each slit form a connecting groove. The inner wall of the positioning sleeve is provided with inner protruding ribs that match the number of connecting grooves and extend along the axial direction of the positioning sleeve. The connection between the tightening sleeve and the positioning 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) to (3): (1) The mounting end is provided with an end face groove at the position between the two slits, and the positioning sleeve is provided with an observation hole corresponding to the end face groove, so as to observe whether the pipe is installed in place through the observation hole and the end face groove when installing the pipe; (2) The inner wall of the positioning 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; (3) The end of the inner rib near the tightening sleeve 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. Second slots are opened on opposite sides of the area from the middle to the tail end. After the first slot is provided on the mounting end, a locking foot is formed from the first slot to the end face of the mounting 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 4, characterized in that, Includes at least one of the following features (1) and (2): (1) The inner wall of the end of the positioning sleeve used to be fastened on the core is provided with an inner convex ring. Along the installation direction, the inner diameter of the positioning sleeve at the inner convex ring gradually increases. 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 sleeve at the position with the smallest inner diameter of the inner convex ring is a, and the outer diameter of the core at the position with 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 4 to 9.

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