Pipe fitting connecting elbow with self-locking structure

Abstract

The invention discloses a pipe fitting connecting elbow with a self-locking structure, and belongs to the technical field of pipe fitting connection.The pipe fitting connecting elbow with the self-locking structure comprises an elbow body connected with a first connecting pipeline and a second connecting pipeline, and the two ends of the elbow body are fixedly connected with a first elbow flange and a second elbow flange respectively; a first sealing groove is formed between the first elbow flange and the first connecting pipeline, a first sealing ring is installed in the first sealing groove, a second sealing groove is formed between the second elbow flange and the second connecting pipeline, and a second sealing ring is installed in the second sealing groove. By designing a self-locking structure, self-locking fixation and hole alignment of an elbow flange and a to-be-connected pipeline flange can be rapidly and accurately completed, after self-locking is completed, pre-fixation of an elbow and a to-be-connected pipeline can be achieved, at the moment, a plurality of sets of fixing bolts are used for fastening a flange piece, operation is easy and convenient, and meanwhile the assembling efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe connection, and in particular relates to a pipe connection elbow with a self-locking structure. Background Art

[0002] In the piping system, elbows are pipe fittings that change the direction of the pipe. According to the angle, there are three most commonly used elbows: 45°, 90°, and 180°. In addition, according to the needs of the project, there are also other non-normal angle elbows such as 60°. The materials of elbows include cast iron, stainless steel, alloy steel, forgeable cast iron, carbon steel, non-ferrous metals and plastics. The ways to connect elbows to pipes include: direct welding (the most common way), flange connection, hot melt connection, electric fusion connection, threaded connection and socket connection; according to the production process, they can be divided into: welded elbows, stamped elbows, push elbows, cast elbows, butt welding elbows, etc.

[0003] The pipe connection elbow is a very common pipe connector, and its main function is to connect pipes at different angles to form a complete piping system. There are various types of pipe connection elbows on the market, but the structural design of most pipe connection elbows is very simple, usually with only one main body and two integrated connecting flanges. In the actual connection and assembly process, due to the lack of a self-locking positioning structure, it is necessary to hold the connection elbow with one hand and use the bolts to penetrate and tighten the bolts with the other hand. Not only is the operation very inconvenient, it is also impossible to quickly and accurately complete the assembly and fixation. At the same time, there are also great safety hazards when the operator is working at high altitudes. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a pipe connection elbow with a self-locking structure and very convenient assembly.

[0005] The technical solution adopted to solve the above technical problems is: a pipe connection elbow with a self-locking structure, comprising an elbow body connected to a first connecting pipe and a second connecting pipe, the two ends of the elbow body are respectively fixedly connected with a first elbow flange and a second elbow flange, the elbow body, the first elbow flange and the second elbow flange are an integrated structure, so that the overall structure is simpler, and it is also convenient to quickly connect and fix with the first connecting pipe and the second connecting pipe, and the first elbow flange and the second elbow flange are provided with a plurality of evenly distributed mounting holes on the circumference of the first elbow flange and the second elbow flange; A first sealing groove is provided between the first elbow flange and the first connecting pipe, a first sealing ring is installed in the first sealing groove, a second sealing groove is provided between the second elbow flange and the second connecting pipe, a second sealing ring is installed in the second sealing groove; Through the above technical solution, during the assembly and connection process of the first elbow flange and the first connecting pipe, the first sealing ring can be installed in the first sealing groove, thereby achieving sealing between the first elbow flange and the first connecting pipe; during the assembly and connection process of the second elbow flange and the second connecting pipe, the second sealing ring can be installed in the second sealing groove, thereby achieving sealing between the second elbow flange and the second connecting pipe; Through the above technical solution, the first sealing ring and the second sealing ring are both made of rubber material, and the first sealing ring and the second sealing ring are respectively positioned in the first sealing groove and the second sealing groove, so as to ensure the sealing of the connection between the elbow body and the first connecting pipe and the second connecting pipe; The first elbow flange and the first connecting pipe, as well as the second elbow flange and the second connecting pipe are fastened by multiple sets of fastening bolts, which can not only achieve stable connection and fixation, but also facilitate quick installation and disassembly. The first elbow flange and the second elbow flange are both provided with self-locking structures corresponding to the first connecting pipe and the second connecting pipe.

[0006] Furthermore, the first connecting pipe includes a first pipe body, one end of the first pipe body is fixedly connected to a first pipe flange, and the first pipe flange is connected to a first elbow flange.

[0007] Through the above technical solution, the first pipe body and the first pipe flange are an integrated structure, so that the first connecting pipe can be quickly connected and fixed to the first elbow flange through multiple sets of fastening bolts.

[0008] Furthermore, the second connecting pipe includes a second pipe body, one end of the second pipe body is fixedly connected to a second pipe flange, and the second pipe flange is connected to a second elbow flange.

[0009] Through the above technical solution, the second pipe body and the second pipe flange are an integrated structure, so that the second connecting pipe can be quickly connected and fixed to the second elbow flange through multiple sets of fastening bolts.

[0010] Furthermore, the first pipe flange and the second pipe flange are also provided with a plurality of evenly distributed mounting holes on their circumferential sides.

[0011] Through the above technical solution, the multiple mounting holes on the first pipe flange and the second pipe flange can correspond one-to-one with the multiple mounting holes on the first elbow flange and the second elbow flange, so that it is convenient to use multiple sets of fastening bolts to quickly realize the connection and fixation between the first pipe flange and the first elbow flange, and the second pipe flange and the second elbow flange.

[0012] Furthermore, the self-locking structure is a self-locking mechanism 1, which includes multiple groups of first limit slide grooves and second limit slide grooves, and a positioning clamp seat is slidably connected between any group of the first limit slide grooves and the second limit slide grooves, and the inner side of the positioning clamp seat is respectively provided with a first limit slider and a second limit slider corresponding to the first limit slide groove and the second limit slide groove, and the outer wall of the positioning clamp seat is fixedly connected to the limiting frame on the side away from the first limit slider and the second limit slider, and a self-locking pin shaft is slidably connected between the positioning clamp seat and the limiting frame, and the center of the outer wall of the self-locking pin shaft is fixedly connected to the limiting ring, and the outer wall of the self-locking pin shaft is sleeved with a reset spring, and the end of the self-locking pin shaft away from the positioning clamp seat is fixedly connected with a reset pull ring.

[0013] Through the above technical solution, when the first elbow flange and the first pipe flange are locked by the self-locking mechanism, the end face of the first elbow flange is first fitted with the end face of the first pipe flange. During the fitting process, the first sealing ring must be ensured to be installed in place. After fitting in place, the positioning clamp seat is slidably inserted between a group of first limiting slide grooves and a second limiting slide groove according to the actual installation position, and the reset pull ring is pulled outward during this process to make the self-locking pin slide out of the inner side of the positioning clamp seat. The positioning clamp seat with a U-shaped structure will be clamped between the first elbow flange and the first pipe flange. At this time, the angle of the elbow body is fine-tuned so that multiple groups of installation The mounting holes are aligned. After multiple groups of mounting holes are aligned, under the elastic action of the reset spring, the self-locking pin will automatically penetrate a group of mounting holes at the corresponding positions to achieve self-locking, so that the positioning clamp seat is stably fixed between the first elbow flange and the first pipe flange. Due to the limiting of the positioning clamp seat and the self-locking pin shaft, the first elbow flange and the first pipe flange are fixed in position, and multiple groups of mounting holes are aligned one by one. At this time, there is no need to support the elbow body with hands, and multiple groups of fastening bolts can be conveniently installed; when using the self-locking mechanism to lock the second elbow flange and the second pipe flange, the operation method is the same and will not be repeated here.

[0014] Furthermore, multiple groups of the first limiting slide grooves and the second limiting slide grooves are evenly opened on the circumferential side of the inner wall of the first elbow flange or the second elbow flange, and the first limiting slide grooves and the second limiting slide grooves are respectively located on both sides of the corresponding mounting holes, and the positioning clamp seat is slidably connected to the corresponding first limiting slide grooves and the second limiting slide grooves through the first limiting slide block and the second limiting slide block.

[0015] Through the above technical scheme, by opening a plurality of groups of first limit slide grooves and second limit slide grooves on the peripheral side of the inner wall of the first elbow flange or the second elbow flange, the positioning clamp can be slidably installed in any group of the first limit slide grooves and the second limit slide grooves, so that the self-locking mechanism can freely select one of the groups of the first limit slide grooves and the second limit slide grooves according to the installation angle and position of the elbow.

[0016] Furthermore, one end of the self-locking pin shaft away from the reset pull ring passes through the positioning clamp seat, and the reset spring is located on the inner side of the limit frame.

[0017] Through the above technical scheme, not only the sliding limit of the self-locking pin shaft can be realized, but also the reset spring can push the self-locking pin shaft into the positioning clamp seat through the limit ring under normal conditions, so that the self-locking pin shaft can be inserted into a group of mounting holes corresponding to the first pipe flange and the first elbow flange, or inserted into a group of mounting holes corresponding to the second pipe flange and the second elbow flange, so as to utilize the self-locking mechanism to realize the locking positioning between the first pipe flange and the first elbow flange, and between the second pipe flange and the second elbow flange, so as to realize the position fixation between the first pipe flange and the first elbow flange, and between the second pipe flange and the second elbow flange, so as to subsequently use multiple sets of fastening bolts for fastening. During the installation process of the multiple sets of fastening bolts, there is no need to manually support the elbow body, and the overall assembly and fixing process is more convenient, saving time and effort.

[0018] Furthermore, the self-locking structure is a second self-locking mechanism, which includes multiple groups of rotating supports, each of which is fixedly connected with a rotating shaft, the outer wall of the rotating shaft is rotatably connected with a rotating bracket, the center of the outer wall of the rotating shaft is sleeved with a reset torsion spring corresponding to the rotating bracket, the side of the rotating bracket away from the rotating shaft is fixedly connected with a main locking block, and the side of the main locking block away from the rotating bracket is fixedly connected with a self-locking clamping block.

[0019] Through the above technical scheme, when the first elbow flange and the first pipe flange are locked by the second self-locking mechanism, the elbow body is held, and then the first elbow flange is brought close to the end face of the first pipe flange. When multiple self-locking clamps contact the end face of the first pipe flange, during the continuous advancement, the multiple self-locking clamps will automatically rotate outward until the multiple self-locking clamps clamp and fix the first pipe flange. Since a reset torsion spring corresponding to the rotating bracket is sleeved at the center of the outer wall of the rotating shaft, when the multiple self-locking clamps clamp and fix the first pipe flange, under the elastic action of the multiple reset torsion springs, the multiple self-locking clamps will stably clamp the first pipe flange, thereby realizing the self-locking positioning of the elbow body and the first pipe flange. At this time, the first elbow flange can be rotated and fine-tuned to align multiple groups of mounting holes. After the multiple groups of mounting holes are aligned, multiple groups of fastening bolts can be conveniently installed; when the second elbow flange and the second pipe flange are locked by the second self-locking mechanism, the operation method is the same and will not be repeated here.

[0020] Furthermore, a plurality of groups of the rotating supports are respectively fixed to the circumferential side of the inner wall of the first elbow flange or the second elbow flange.

[0021] Through the above technical solution, multiple groups of rotating supports can play a role in rotationally limiting the main structure of the self-locking mechanism 2, so that multiple groups of self-locking mechanism 2 are evenly distributed around the inner wall of the first elbow flange or the second elbow flange.

[0022] Furthermore, the tail of the self-locking clamp is designed to be a hemispherical structure.

[0023] Through the above technical solution, by designing the tail of the self-locking clamp into a hemispherical structure, when multiple sets of self-locking mechanisms are buckled in two directions with the first pipe flange or the second pipe flange, the self-locking clamp with a hemispherical tail structure can smoothly rotate at an angle when it contacts the first pipe flange or the second pipe flange, so that it can be buckled and fixed with the first pipe flange or the second pipe flange more quickly to achieve self-locking.

[0024] The beneficial effects of the present invention are as follows: (1) The present invention can quickly and accurately complete the self-locking fixation and hole alignment of the elbow flange and the flange of the pipe to be connected by designing a self-locking structure. After the self-locking is completed, the elbow can be pre-fixed with the connected pipe. At this time, multiple sets of fixing bolts can be used to tighten the flange parts. The operation is simple and convenient, and the assembly efficiency is greatly improved. (2) The present invention can quickly complete the positioning and fixation between the elbow and the pipe before bolt tightening by designing a simple self-locking positioning structure. There is no need to always hold up the elbow and rotate it during the assembly process. When the operator is working in the air, the safety hazard is greatly reduced. (3) The present invention The invention discloses that by designing a combined self-locking mechanism 1, the self-locking mechanism 1 can freely select one of the groups of limit slide grooves for installation and positioning according to the installation angle and position of the elbow, so that its overall flexibility is greatly improved, and the actual operation is less restricted by the installation conditions and installation positions; (4) the invention discloses that by designing multiple groups of evenly distributed self-locking mechanisms 2, multiple self-locking clamps can be used to stably clamp the pipe flange during connection, thereby realizing the self-locking positioning of the elbow body and the pipe flange. After the self-locking is completed, the elbow flange can be rotated and fine-tuned to align the multiple groups of installation holes. After the multiple groups of installation holes are aligned, the multiple groups of fastening bolts can be conveniently installed, and the operation is simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a first-view structural diagram of the first embodiment of the present invention.

[0026] Figure 2 It is a structural diagram from a second viewing angle of the first embodiment of the present invention.

[0027] Figure 3 It is a front view of the first embodiment of the present invention.

[0028] Figure 4 It is a right side view of the first embodiment of the present invention.

[0029] Figure 5 Figure 4 AA section view.

[0030] Figure 6 It is a schematic diagram of the connection structure of the connecting pipeline of the present invention.

[0031] Figure 7 This is a first viewing angle diagram of the main structure of Example 1 of the present invention.

[0032] Figure 8 It is a second viewing angle diagram of the main structure of the first embodiment of the present invention.

[0033] Fig. 9 Figure 8 A partial enlarged view of point A in the middle.

[0034] Fig.10 It is a third viewing angle diagram of the main structure of the first embodiment of the present invention.

[0035] Fig.11 It is a front view of the main structure of embodiment 1 of the present invention.

[0036] Fig.12 It is a first viewing angle diagram of the self-locking mechanism 1 of the present invention.

[0037] Fig.13 It is a second viewing angle diagram of the self-locking mechanism 1 of the present invention.

[0038] Fig.14 It is a cross-sectional view of a self-locking mechanism 1 of the present invention.

[0039] Fig.15 This is a first viewing angle structural diagram of the second embodiment of the present invention.

[0040] Fig.16 This is a structural diagram from a second viewing angle of the second embodiment of the present invention.

[0041] Fig.17 It is a front view of the second embodiment of the present invention.

[0042] Fig.18 It is a right side view of the second embodiment of the present invention.

[0043] Fig.19 Fig.18 Middle BB section view.

[0044] Fig. 20 This is a first viewing angle diagram of the main structure of the second embodiment of the present invention.

[0045] Fig.21 This is a second viewing angle diagram of the main structure of the second embodiment of the present invention.

[0046] Fig. 22 It is a front view of the main structure of the second embodiment of the present invention.

[0047] Fig.23 It is a three-dimensional structural diagram of the self-locking mechanism 2 of the present invention.

[0048] Fig.24 It is a structural schematic diagram of the first and second connecting pipelines of the present invention.

[0049] Reference numerals: 1, elbow body; 2, first elbow flange; 3, second elbow flange; 4, mounting hole; 5, first connecting pipe; 501, first pipe body; 502, first pipe flange; 6, second connecting pipe; 601, second pipe body; 602, second pipe flange; 7, first sealing groove; 8, first sealing ring; 9, second sealing groove; 10, second sealing ring; 11, fastening bolt; 12, self-locking mechanism 1; 1201, first limiting slide groove; 1202, second limit slide; 1203, positioning clamp seat; 1204, first limit slider; 1205, second limit slider; 1206, limit frame; 1207, self-locking pin; 1208, limit ring; 1209, reset spring; 1210, reset pull ring; 13, self-locking mechanism II; 1301, rotating support; 1302, rotating shaft; 1303, rotating bracket; 1304, reset torsion spring; 1305, main locking block; 1306, self-locking clamp block. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0051] Embodiment 1, as Figure 1-Figure 14 As shown, a pipe connecting elbow with a self-locking structure in this embodiment includes an elbow body 1 connected to a first connecting pipe 5 and a second connecting pipe 6.

[0052] The first connecting pipe 5 includes a first pipe body 501, one end of which is fixedly connected to a first pipe flange 502, and the first pipe flange 502 is connected to the first elbow flange 2. The first pipe body 501 and the first pipe flange 502 are an integrated structure, so that the first connecting pipe 5 can be quickly connected and fixed to the first elbow flange 2 by multiple sets of fastening bolts 11.

[0053] The second connecting pipe 6 includes a second pipe body 601, one end of which is fixedly connected to a second pipe flange 602, and the second pipe flange 602 is connected to the second elbow flange 3. The second pipe body 601 and the second pipe flange 602 are an integrated structure, so that the second connecting pipe 6 can be quickly connected and fixed to the second elbow flange 3 by multiple sets of fastening bolts 11.

[0054] like Figure 6 or Fig.24 As shown, the two ends of the elbow body 1 are fixedly connected with the first elbow flange 2 and the second elbow flange 3 respectively. The elbow body 1, the first elbow flange 2 and the second elbow flange 3 are an integrated structure, which makes the overall structure simpler and also facilitates quick connection and fixation with the first connecting pipe 5 and the second connecting pipe 6. The first elbow flange 2 and the second elbow flange 3 are provided with a plurality of evenly distributed mounting holes 4 on their circumferential sides.

[0055] The first pipe flange 502 and the second pipe flange 602 are also provided with a plurality of evenly distributed mounting holes 4 on their circumferential sides, so that the plurality of mounting holes 4 on the first pipe flange 502 and the second pipe flange 602 can correspond one-to-one with the plurality of mounting holes 4 on the first elbow flange 2 and the second elbow flange 3, thereby facilitating the use of a plurality of sets of fastening bolts 11 to quickly realize the connection and fixation between the first pipe flange 502 and the first elbow flange 2, and the second pipe flange 602 and the second elbow flange 3.

[0056] like Figure 7-Figure 8 As shown, a first sealing groove 7 is opened between the first elbow flange 2 and the first connecting pipe 5, and a first sealing ring 8 is installed in the first sealing groove 7; a second sealing groove 9 is opened between the second elbow flange 3 and the second connecting pipe 6, and a second sealing ring 10 is installed in the second sealing groove 9; during the assembly and connection process of the first elbow flange 2 and the first connecting pipe 5, the first sealing ring 8 can be installed in the first sealing groove 7, thereby achieving sealing between the first elbow flange 2 and the first connecting pipe 5; during the assembly and connection process of the second elbow flange 3 and the second connecting pipe 6, the second sealing ring 10 can be installed in the second sealing groove 9, thereby achieving sealing between the second elbow flange 3 and the second connecting pipe 6.

[0057] The first sealing ring 8 and the second sealing ring 10 are both made of rubber material. The first sealing ring 8 and the second sealing ring 10 are respectively positioned in the first sealing groove 7 and the second sealing groove 9 by snapping, so as to ensure the sealing of the connection between the elbow body 1 and the first connecting pipe 5 and the second connecting pipe 6.

[0058] The first elbow flange 2 and the first connecting pipe 5, as well as the second elbow flange 3 and the second connecting pipe 6, are fastened by multiple sets of fastening bolts 11, which can achieve stable connection and fixation, and also facilitate quick installation and disassembly.

[0059] like Figure 12-14As shown, the first elbow flange 2 and the second elbow flange 3 are both provided with self-locking structures corresponding to the first connecting pipe 5 and the second connecting pipe 6; the self-locking structure is a self-locking mechanism 12, and the self-locking mechanism 12 includes a plurality of first limiting slide grooves 1201 and second limiting slide grooves 1202, and a positioning clamp seat 1203 is slidably connected between any group of the first limiting slide grooves 1201 and the second limiting slide grooves 1202, and the inner side of the positioning clamp seat 1203 is respectively provided with a first limiting slider 1204 and a second limiting slider 1205 corresponding to the first limiting slide grooves 1201 and the second limiting slide grooves 1202, and the positioning clamp seat 1203 The side of the outer wall away from the first limit slider 1204 and the second limit slider 1205 is fixedly connected to the limit frame 1206, and a self-locking pin 1207 is slidably connected between the positioning clamp seat 1203 and the limit frame 1206. The center of the outer wall of the self-locking pin 1207 is fixedly connected to the limit ring 1208, and the outer wall of the self-locking pin 1207 is sleeved with a reset spring 1209. The end of the self-locking pin 1207 away from the positioning clamp seat 1203 is fixedly connected to a reset pull ring 1210. When the first elbow flange 2 and the first pipe flange 502 are locked by the self-locking mechanism 12, the end face of the first elbow flange 2 is first aligned with the first pipe flange 50 2, during the fitting process, ensure that the first sealing ring 8 is installed in place. After fitting in place, according to the actual installation position, slide the positioning clamp seat 1203 into a group of first limiting slide grooves 1201 and the second limiting slide grooves 1202, and pull the reset pull ring 1210 outwards during this process to make the self-locking pin shaft 1207 slide out of the inner side of the positioning clamp seat 1203. The positioning clamp seat 1203 with a U-shaped structure will be clamped between the first elbow flange 2 and the first pipe flange 502. At this time, fine-tune the angle of the elbow body 1 to align the multiple groups of mounting holes 4. After the multiple groups of mounting holes 4 are aligned, the reset spring 1209 is released. Under the action of the self-locking pin 1207, the self-locking pin 1207 will automatically pass through a group of mounting holes 4 at the corresponding positions to achieve self-locking, so that the positioning clamp seat 1203 is stably fixed between the first elbow flange 2 and the first pipe flange 502. Due to the limiting of the positioning clamp seat 1203 and the self-locking pin 1207, the first elbow flange 2 and the first pipe flange 502 are fixed in position, and multiple groups of mounting holes 4 are aligned one by one. At this time, there is no need to support the elbow body 1 by hand, and multiple groups of fastening bolts 11 can be conveniently installed; when using the self-locking mechanism 12 to lock the second elbow flange 3 and the second pipe flange 602, the operation method is the same and will not be repeated here.

[0060] A plurality of groups of first limiting grooves 1201 and second limiting grooves 1202 are evenly arranged on the circumferential side of the inner wall of the first elbow flange 2 or the second elbow flange 3, and the first limiting grooves 1201 and the second limiting grooves 1202 are respectively located on both sides of the corresponding mounting hole 4, and the positioning clamp seat 1203 is slidably connected with the corresponding first limiting grooves 1201 and second limiting grooves 1202 through the first limiting slider 1204 and the second limiting slider 1205, respectively. Through the plurality of groups of first limiting grooves 1201 and second limiting grooves 1202 arranged on the circumferential side of the inner wall of the first elbow flange 2 or the second elbow flange 3, the positioning clamp seat 1203 can be slidably installed in any group of the first limiting grooves 1201 and the second limiting grooves 1202, so that the self-locking mechanism 12 can freely select one of the groups of the first limiting grooves 1201 and the second limiting grooves 1202 according to the installation angle and position of the elbow.

[0061] The end of the self-locking pin shaft 1207 away from the reset pull ring 1210 passes through the positioning clamp seat 1203, and the reset spring 1209 is located on the inner side of the limit frame 1206, which can not only realize the sliding limit of the self-locking pin shaft 1207, but also enable the reset spring 1209 to push the self-locking pin shaft 1207 into the positioning clamp seat 1203 through the limit ring 1208 under normal conditions, so that the self-locking pin shaft 1207 can be inserted into a group of mounting holes 4 corresponding to the first pipe flange 502 and the first elbow flange 2, or inserted into the second pipe flange 602 and the second elbow flange 602. In a group of mounting holes 4 corresponding to the head flanges 3, a self-locking mechanism 12 is used to realize the locking and positioning between the first pipe flange 502 and the first elbow flange 2, and between the second pipe flange 602 and the second elbow flange 3, so as to realize the fixation of the position between the first pipe flange 502 and the first elbow flange 2, and between the second pipe flange 602 and the second elbow flange 3, so as to facilitate the subsequent tightening with multiple groups of fastening bolts 11. During the installation process of the multiple groups of fastening bolts 11, there is no need to manually support the elbow body 1, and the overall assembly and fixing process is more convenient, saving time and effort.

[0062] When the positioning clamp seat 1203 needs to be disassembled, it is only necessary to pull out the limit ring 1208 to drive the self-locking pin shaft 1207 to disengage from the corresponding mounting hole 4, thereby completing the unlocking, and finally pulling out the positioning clamp seat 1203 to complete the disassembly.

[0063] Embodiment 2, as Figure 15-Figure 23As shown, this embodiment is based on the embodiment one, and the self-locking structure of this embodiment is a self-locking mechanism 2 13, and the self-locking mechanism 2 13 includes multiple groups of rotating supports 1301, and the multiple groups of rotating supports 1301 are respectively fixed to the peripheral side of the inner wall of the first elbow flange 2 or the second elbow flange 3, so that the multiple groups of rotating supports 1301 can play a rotation limiting role on the main structure of the self-locking mechanism 2 13, so that the multiple groups of self-locking mechanisms 2 13 are evenly distributed on the peripheral side of the inner wall of the first elbow flange 2 or the second elbow flange 3; A rotating shaft 1302 is fixedly connected between the multiple groups of rotating supports 1301, and a rotating bracket 1303 is rotatably connected to the outer wall of the rotating shaft 1302. A reset torsion spring 1304 corresponding to the rotating bracket 1303 is sleeved at the center of the outer wall of the rotating shaft 1302. A main locking block 1305 is fixedly connected to the side of the rotating bracket 1303 away from the rotating shaft 1302. A self-locking clamp 1306 is fixedly connected to the side of the main locking block 1305 away from the rotating bracket 1303. The tail portion is designed as a hemispherical structure. By designing the tail portion of the self-locking clamp 1306 as a hemispherical structure, when the multiple sets of self-locking mechanisms 13 are buckled with the first pipe flange 502 or the second pipe flange 602, the self-locking clamp 1306 with a hemispherical structure at the tail portion can smoothly rotate at an angle when in contact with the first pipe flange 502 or the second pipe flange 602, so that it can be buckled and fixed with the first pipe flange 502 or the second pipe flange 602 more quickly to achieve self-locking; When the self-locking mechanism 13 is used to lock the first elbow flange 2 and the first pipe flange 502, the elbow body 1 is held, and then the first elbow flange 2 is brought close to the end face of the first pipe flange 502. During this process, the second sealing ring 10 must be installed in place. When the multiple self-locking clamps 1306 contact the end face of the first pipe flange 502, the multiple self-locking clamps 1306 will automatically rotate outward during the continuous advancement process until the multiple self-locking clamps 1306 clamp and fix the first pipe flange 502. Since the outer wall center of the rotating shaft 1302 is sleeved with a reset torque corresponding to the rotating bracket 1303, Spring 1304, when multiple self-locking clamps 1306 clamp and fix the first pipe flange 502, under the elastic action of multiple reset torsion springs 1304, the multiple self-locking clamps 1306 will stably clamp the first pipe flange 502, thereby realizing the self-locking positioning of the elbow body 1 and the first pipe flange 502. At this time, the first elbow flange 2 can be rotated and fine-tuned to align the multiple groups of mounting holes 4. After the multiple groups of mounting holes 4 are aligned, the multiple groups of fastening bolts 11 can be conveniently installed; when using the self-locking mechanism 2 13 to lock the second elbow flange 3 and the second pipe flange 602, the operation method is the same and will not be repeated here.

[0064] The working principle of this embodiment is as follows: hold the elbow body 1, and move the first elbow flange 2 on the elbow body 1 close to the end face of the first pipe flange 502. During the process, ensure that the first sealing ring 8 is installed in place. The first elbow flange 2 and the second elbow flange 3 are both provided with self-locking structures corresponding to the first connecting pipe 5 and the second connecting pipe 6. The self-locking mechanism 1 12 or the self-locking mechanism 2 13 can be used to complete the self-locking between the first elbow flange 2 and the first pipe flange 502. After the self-locking is completed, the first elbow flange 2 can be rotated and fine-tuned to align the corresponding multiple groups of mounting holes 4 on the first elbow flange 2 and the second elbow flange 3. After the multiple groups of mounting holes 4 are aligned, the first elbow flange 2 and the second elbow flange 3 can be locked and fixed by multiple groups of fastening bolts 11. When the second elbow flange 3 and the second pipe flange 602 are locked by the self-locking structure, the operation method is the same as above.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A pipe connection elbow with a self-locking structure, comprising an elbow body (1) connected to a first connecting pipe (5) and a second connecting pipe (6), characterized in that: The two ends of the elbow body (1) are respectively fixedly connected with a first elbow flange (2) and a second elbow flange (3), and the circumference of the first elbow flange (2) and the second elbow flange (3) is provided with a plurality of evenly distributed mounting holes (4); A first sealing groove (7) is provided between the first elbow flange (2) and the first connecting pipe (5), a first sealing ring (8) is installed in the first sealing groove (7), a second sealing groove (9) is provided between the second elbow flange (3) and the second connecting pipe (6), a second sealing ring (10) is installed in the second sealing groove (9); The first elbow flange (2) and the first connecting pipe (5), and the second elbow flange (3) and the second connecting pipe (6) are fastened by means of a plurality of sets of fastening bolts (11), and the first elbow flange (2) and the second elbow flange (3) are both provided with self-locking structures corresponding to the first connecting pipe (5) and the second connecting pipe (6).

2. The pipe connection elbow with a self-locking structure according to claim 1, characterized in that: The first connecting pipe (5) comprises a first pipe body (501), one end of the first pipe body (501) being fixedly connected to a first pipe flange (502), and the first pipe flange (502) being connected to a first elbow flange (2).

3. The pipe connection elbow with a self-locking structure according to claim 2, characterized in that: The second connecting pipe (6) comprises a second pipe body (601), one end of the second pipe body (601) being fixedly connected to a second pipe flange (602), and the second pipe flange (602) being connected to a second elbow flange (3).

4. The pipe connection elbow with a self-locking structure according to claim 3, characterized in that: The first pipeline flange (502) and the second pipeline flange (602) are also provided with a plurality of evenly distributed mounting holes (4) on their circumferential sides.

5. The pipe connection elbow with a self-locking structure according to claim 1, characterized in that: The self-locking structure is a self-locking mechanism 1 (12), and the self-locking mechanism 1 (12) includes a plurality of groups of first limiting slide grooves (1201) and second limiting slide grooves (1202), and a positioning clamp seat (1203) is slidably connected between any group of the first limiting slide grooves (1201) and the second limiting slide grooves (1202), and the inner side of the positioning clamp seat (1203) is respectively provided with a first limiting slide block (1204) and a second limiting slide block (1205) corresponding to the first limiting slide groove (1201) and the second limiting slide groove (1202), and the positioning clamp seat (120 3) A side of the outer wall away from the first limit slider (1204) and the second limit slider (1205) is fixedly connected to a limit frame (1206), a self-locking pin shaft (1207) is slidably connected between the positioning clamp seat (1203) and the limit frame (1206), the center of the outer wall of the self-locking pin shaft (1207) is fixedly connected to a limit ring (1208), the outer wall of the self-locking pin shaft (1207) is sleeved with a reset spring (1209), and one end of the self-locking pin shaft (1207) away from the positioning clamp seat (1203) is fixedly connected to a reset pull ring (1210).

6. The pipe connection elbow with a self-locking structure according to claim 5, characterized in that: A plurality of groups of the first limiting sliding grooves (1201) and the second limiting sliding grooves (1202) are evenly arranged on the circumferential side of the inner wall of the first elbow flange (2) or the second elbow flange (3), and the positioning clamp seat (1203) is slidably connected to the corresponding first limiting sliding grooves (1201) and the second limiting sliding grooves (1202) respectively through the first limiting sliding block (1204) and the second limiting sliding block (1205).

7. The pipe connection elbow with a self-locking structure according to claim 5, characterized in that: One end of the self-locking pin shaft (1207) away from the reset pull ring (1210) passes through the positioning clamp seat (1203), and the reset spring (1209) is located on the inner side of the limiting frame (1206).

8. The pipe connection elbow with a self-locking structure according to claim 1, characterized in that: The self-locking structure is a second self-locking mechanism (13), and the second self-locking mechanism (13) comprises a plurality of groups of rotating supports (1301), wherein the plurality of groups of rotating supports (1301) are fixedly connected with a rotating shaft (1302), the outer wall of the rotating shaft (1302) is rotatably connected with a rotating bracket (1303), a return torsion spring (1304) corresponding to the rotating bracket (1303) is sleeved at the center of the outer wall of the rotating shaft (1302), a main locking block (1305) is fixedly connected to the side of the rotating bracket (1303) away from the rotating shaft (1302), and a self-locking clamping block (1306) is fixedly connected to the side of the main locking block (1305) away from the rotating bracket (1303).

9. The pipe connection elbow with a self-locking structure according to claim 8, characterized in that: The plurality of groups of rotating supports (1301) are respectively fixed to the circumferential side of the inner wall of the first elbow flange (2) or the second elbow flange (3).

10. The pipe connection elbow with a self-locking structure according to claim 9, characterized in that: The tail of the self-locking clamp (1306) is designed to be a hemispherical structure.

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