Self-locking movable bend

Abstract

The utility model relates to pipeline connection technical field discloses a kind of self-locking movable elbow, including self-locking mechanism and the reversing mechanism of self-locking mechanism fixed connection, the connecting pipe one of self-locking mechanism is equipped with plug-in rod, plug-in rod is equipped with the bolt driven by gas pressure rod, when inserting main body pipeline, bolt can automatically extend and be locked into pipe wall to realize self-locking, reversing mechanism includes the pipeline one and pipeline two relatively rotatable, and ratchet wheel is fixed on pipeline two;The grappling hook on the middle pipe is engaged with ratchet wheel by inserting different upper and lower slots, to realize the one-way restriction to the rotating direction of pipeline two.The utility model realizes quick plug and automatic locking by self-locking mechanism, and connection is reliable;By reversing mechanism, effectively prevent reverse loosening when adjusting angle, and can guide disassembly direction, significantly improve the convenience, security and reliability of operation.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and in particular to a self-locking movable elbow. Background Technology

[0002] In fluid transport, mechanical equipment, and industrial pipeline systems, flexible elbows are a key pipe connector widely used to connect pipes with different orientations and allow for flexible adjustment of the angle between pipes.

[0003] Existing adjustable elbows mostly use threaded structures to achieve angle adjustment. However, this structure has inherent drawbacks in practical use. Under equipment vibration or fluctuations in fluid pressure within the pipe, the threaded connection may rotate in the opposite direction, causing the connection to loosen or even detach. This not only leads to media leakage but also poses a serious safety hazard. To prevent loosening, operators need to use additional components such as lock nuts, which increases the complexity of operation.

[0004] Meanwhile, the connection between these flexible elbows and the main pipeline relies on threaded tightening or flange fastening. Although these connection methods are relatively reliable, their installation and disassembly processes are time-consuming and labor-intensive, requiring specialized tools. In situations where frequent disassembly and assembly are needed for maintenance, cleaning, or pipeline replacement, their work efficiency is low and cannot meet the requirements for rapid response.

[0005] Existing technologies lack a movable elbow that can effectively integrate a quick-plug self-locking function with a controllable, anti-loosening rotation adjustment function. Users cannot achieve both convenience and safety, resulting in limitations on the efficiency and reliability of pipeline connections under complex working conditions.

[0006] Therefore, this utility model proposes a self-locking movable elbow to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems of cumbersome and time-consuming connection and installation process, easy to loosen due to reverse rotation during angle adjustment, and low reliability of the existing self-locking movable elbow, this utility model aims to provide a self-locking movable elbow with an improved structure that can effectively solve the above problems.

[0008] This utility model provides a self-locking movable elbow, including a self-locking mechanism and a reversing mechanism; the self-locking mechanism includes a connecting pipe and a rod disposed in the connecting pipe; the reversing mechanism includes a pipe, a middle pipe and a pipe.

[0009] Pipe 1 is fixedly connected to connecting pipe 1 of the self-locking mechanism, thereby integrating the two mechanisms into an organic whole;

[0010] Pipe 1 has a connecting thread 1 at its end, and pipe 2 has an internal thread. Connecting thread 1 is rotatably threaded to the internal thread to provide a basis for the rotation of the movable elbow.

[0011] A ratchet is also fixedly connected to pipe 2. The middle pipe is sleeved at the connection between pipe 1 and pipe 2. A hook is pivotally connected to the middle pipe. The hook is used to selectively engage with the ratchet. Through this combination of structures, precise control of the elbow rotation direction can be achieved.

[0012] Preferably, the insertion rod is provided with a movable hole, and a pin is slidably connected in the movable hole; the self-locking mechanism also includes a pneumatic rod set in the insertion rod and a stop for limiting the pin. The pneumatic rod is used to elastically push the pin out to lock into the inner wall of the connecting tube 2. This design realizes the automatic locking function of the connection action by utilizing the elasticity of the pneumatic rod, which improves the ease of operation.

[0013] Preferably, a support rod is slidably connected inside the insertion rod, and a locking block is provided on the support rod; the top contact surface between the pin and the support rod is provided with a mating bevel angle. The structure is used to automatically retract the pin inward by the pushing of the support rod when the insertion rod is inserted, in preparation for the subsequent locking action.

[0014] In a further preferred embodiment, when the connecting tube is pressed again, the pin can lock the middle of the locking block; then the locking block is dragged up, and the protrusion of the locking block makes the pin overcome the thrust of the pneumatic rod and remain in a retracted state. Through this ingenious mechanical cooperation, tool-free quick unlocking and disassembly are achieved.

[0015] Preferably, the thread length of the connecting thread one is greater than the thread depth of the internal thread. This dimensional difference design ensures that after the threads of pipe one and pipe two are fully screwed in, there is still a rotational clearance between them, which is the basic structural guarantee for realizing the "moving" function of the elbow.

[0016] Preferably, the ratchet is fixedly connected to the outer periphery of the second pipe; a fixing block is also fixed on the middle pipe, and the grab hook rotates around the fixing block as a pivot. This arrangement provides reliable structural support for the stable engagement and switching action of the grab hook.

[0017] Preferably, the middle tube has an upper slot and a lower slot, and the hook has an upper end and a lower end that can be inserted into the upper slot or the lower slot respectively. These two slots serve as positioning points for different working modes of the hook, providing a structural basis for locking the rotation direction in the forward or reverse direction.

[0018] More specifically, when the upper end of the grab hook is inserted into the upper slot, the grab hook engages with the ratchet, thereby unidirectionally restricting the rotation of the second pipe. This effectively prevents accidental reverse rotation when adjusting the elbow angle, avoids the risk of loose connection, and significantly improves the safety of use.

[0019] More specifically, when the lower end of the gripper is inserted into the lower slot, the gripper engages with the ratchet, thereby restricting the rotation of the ratchet in the opposite direction, ensuring that the second pipe can only rotate in the preset disassembly direction. This error-proof design standardizes the disassembly process and avoids jamming or damage caused by incorrect direction.

[0020] This utility model has the following beneficial effects:

[0021] 1. This utility model solves the problem of slow installation and disassembly and cumbersome operation caused by existing pipeline connections relying on threads by setting a self-locking mechanism for the pin driven by a pneumatic rod and cooperating with the support rod and the locking block. It achieves the effects of quick insertion and removal, automatic locking, reliable connection and convenient operation.

[0022] 2. This utility model solves the problem that existing movable elbows are prone to loosening due to reverse rotation when adjusting the angle, which poses a safety hazard, by setting a reversing mechanism consisting of a ratchet and a switchable hook. It achieves the technical effect of unidirectional locking of the elbow rotation direction to prevent accidental loosening, thereby improving the stability and safety of the adjustment process.

[0023] 3. This utility model, by switching the engagement state of the gripper and the ratchet, reverses and locks the rotation direction during disassembly, solving the problem of operation difficulties caused by incorrect rotation direction during disassembly, and achieving the effects of guiding disassembly, standardizing the operation process, preventing errors, and achieving efficient disassembly. Attached Figure Description

[0024] Figure 1 This is a perspective view of a self-locking movable elbow proposed in this utility model;

[0025] Figure 2 This is a side view of a self-locking movable elbow proposed in this utility model;

[0026] Figure 3 This is an exploded view of the self-locking mechanism of a self-locking movable elbow proposed in this utility model;

[0027] Figure 4 This is a partial view of the self-locking mechanism of a self-locking movable elbow proposed in this utility model;

[0028] Figure 5 This is an exploded view of a reversing mechanism for a self-locking movable elbow proposed in this utility model.

[0029] Legend:

[0030] 1. Main pipeline; 2. Self-locking mechanism; 201. Connecting pipe one; 202. Insert rod; 203. Movable hole; 204. Connecting pipe two; 205. Support rod; 206. Locking block; 207. Stop block; 208. Pin; 209. Pneumatic rod; 3. Reversing mechanism; 301. Pipe one; 302. Connecting thread one; 303. Middle pipe; 304. Upper slot; 305. Lower slot; 306. Ratchet; 307. Hook; 308. Pipe two; 309. Fixing block; 310. Internal thread. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example:

[0033] Please refer to Figures 1 to 5 This utility model provides a self-locking movable elbow, which aims to solve the problems of insufficient connection reliability, slow installation and disassembly, and easy reverse loosening during angle adjustment in the prior art.

[0034] like Figure 1 and Figure 2 As shown, a self-locking movable elbow includes a self-locking mechanism 2 and a reversing mechanism 3 fixedly connected to the self-locking mechanism 2; the self-locking mechanism 2 is used to realize quick connection and locking with the main pipeline 1, and the main pipeline 1 is provided with a connecting pipe 204 as a connecting female port; the reversing mechanism 3 is used to realize the angle adjustment of the pipeline.

[0035] Specifically, such as Figure 3 and Figure 4 As shown, the self-locking mechanism 2 includes a first connecting tube 201, which is adapted to be pluggably locked in a second connecting tube 204, and a plug rod 202 is also provided in the first connecting tube 201.

[0036] like Figure 5 As shown, the reversing mechanism 3 includes pipe one 301, middle pipe 303 and pipe two 308;

[0037] The connection relationship between the self-locking mechanism 2 and the reversing mechanism 3 is as follows: pipe 301 is fixedly connected to the connecting pipe 201 of the self-locking mechanism 2, thereby integrating the two mechanisms into a whole.

[0038] Please refer to Figure 3 and Figure 4 The structure of the self-locking mechanism 2 will be described in detail below:

[0039] The insertion rod 202 is provided with a movable hole 203, and a pin 208 is slidably connected in the movable hole 203;

[0040] The insert 202 also has a stop 207 fixed inside, which is used to limit the pin 208 when it retracts;

[0041] The insert rod 202 is also equipped with a pneumatic rod 209, which is used to elastically push the pin 208 outward to engage with the inner wall of the second connecting tube 204, thereby locking the first connecting tube 201 and the second connecting tube 204.

[0042] A support rod 205 is also slidably connected inside the insertion rod 202, and a locking block 206 is provided on the support rod 205;

[0043] The top contact surfaces of the pin 208 and the support rod 205 are provided with a mating bevel.

[0044] In the assembled state, when the insertion rod 202 is inserted into the connecting tube 204, the pin 208 first contacts the top inclined surface of the support rod 205. The pushing force of the support rod 205 causes the pin 208 to retract within the movable hole 203. When the insertion rod 202 is fully inserted, and the pin 208 passes over the top inclined surface of the support rod 205 and aligns with the inner wall groove of the connecting tube 204, the elastic force of the pneumatic rod 209 pushes the pin 208 out and into place, completing the self-locking process.

[0045] During disassembly, when the connecting tube 1 201 is pressed again, the pin 208 is locked in the middle of the locking block 206; then the connecting tube 1 201 is pulled upwards, and the protrusion of the locking block 206 will force the pin 208 to overcome the thrust of the pneumatic rod 209 and remain in a retracted state. At this time, the rod 202 can be pulled out from the connecting tube 2 204.

[0046] Please refer to Figure 5 In a preferred embodiment, in order to realize the angle adjustment function of the movable elbow, the end of the pipe 301 in the reversing mechanism 3 is provided with a connecting thread 302, and the pipe 308 is provided with an internal thread 310. The pipe 301 is threadedly connected to the internal thread 310 through the connecting thread 302.

[0047] To ensure that the pipes can still rotate after being tightened, the thread length of the connecting thread 302 is greater than the thread depth of the internal thread 310, so that the pipes 301 and 308 can still rotate relative to each other after being fully screwed in.

[0048] As another preferred embodiment, in order to lock the rotation direction, a ratchet 306 is fixedly connected to the outer periphery of the second pipe 308.

[0049] The middle pipe 303 is fitted at the connection between pipe 1 301 and pipe 2 308, and a fixing block 309 is also fixed on the middle pipe 303;

[0050] The reversing mechanism 3 also includes a grab hook 307, which is rotatably connected to the middle tube 303 with the fixed block 309 as the pivot.

[0051] In another preferred embodiment, an upper slot 304 and a lower slot 305 are provided on the middle tube 303 in order to switch the locking direction;

[0052] The hook 307 has an upper end and a lower end that can be inserted into the upper slot 304 or the lower slot 305 respectively, and the hook 307 is used to selectively engage with the ratchet 306.

[0053] Working principle: When connecting the main pipeline 1, first align the connecting pipe 201 of the self-locking mechanism 2 with the connecting pipe 204 on the main pipeline 1. Then, insert the rod 202 inside the connecting pipe 201 into the connecting pipe 204. When the pin 208 inside the rod 202 contacts the top inclined surface of the support rod 205, due to the angled design, the pin 208 is pushed open by the support rod 205 and retracts inside the movable hole 203. The stop block 207 limits the pin 208 inside the movable hole 203. When the pin 208 disengages from the top of the support rod 205... When on an inclined plane, the pneumatic rod 209 releases thrust to push the pin 208 outward and into the groove on the inner wall of the connecting tube 204, thereby fixing the connecting tube 1 201 and the connecting tube 204. When disassembly is required, press the connecting tube 1 201 again so that the pin 208 is locked in the middle of the locking block 206 on the support rod 205. Then, pull the connecting tube 1 201 upward. Because of the protrusion of the locking block 206, the pin 208 overcomes the thrust of the pneumatic rod 209 and is in a retracted state. At this time, the rod 202 can be smoothly pulled out from the connecting tube 204, completing the disassembly.

[0054] When installing the reversing mechanism 3, pipe 1 301 is fixedly connected to connecting pipe 1 201, aligning pipe 1 301 with pipe 2 308. Then, the connecting thread 1 302 of pipe 1 301 is screwed into the internal thread 310 on pipe 2 308 to complete the fixation. Because the thread length of connecting thread 1 302 is longer than the thread depth of internal thread 310, pipe 2 308 can still rotate relative to pipe 1 301 after being fully screwed in. When adjusting the elbow angle, press the upper end of the grab hook 307. The grab hook 307 rotates around the fixing block 309 fixed to the middle pipe 303, causing its upper end to insert into the middle... The upper slot 304 on the middle pipe 303 engages the hook 307 with the ratchet 306 fixed on the second pipe 308, unidirectionally restricting the rotation direction of the second pipe 308 to prevent it from falling off due to reverse rotation when adjusting the angle. When it is necessary to disassemble the second pipe 308, the upper end of the hook 307 is pulled out from the upper slot 304, and the hook 307 is rotated so that its lower end is inserted into the lower slot 305 on the middle pipe 303. At this time, the hook 307 engages with the ratchet 306, restricting the rotation of the ratchet 306 in the reverse direction, ensuring that the second pipe 308 rotates in the opposite direction of disassembly, thus completing the disassembly of the equipment.

Claims

1. A self-locking movable elbow, comprising: A self-locking mechanism (2) includes a connecting pipe (201) and a plug (202) disposed within the connecting pipe (201). The connecting pipe (201) is adapted to be pluggably locked within a connecting pipe (204) on an external main pipe (1). A reversing mechanism (3) includes a pipe (301), a central pipe (303), and a pipe (308). The pipe (301) is fixedly connected to the connecting pipe (201) of the self-locking mechanism (2). The first pipe (301) is provided with a connecting thread (302) at its end, and the second pipe (308) is provided with an internal thread (310). The connecting thread (302) is rotatably threaded to the internal thread (310). A ratchet (306) is also fixedly connected to the second pipe (308). The middle pipe (303) is sleeved at the connection between the first pipe (301) and the second pipe (308). A hook (307) is pivotally connected to the middle pipe (303). The hook (307) is used to selectively engage with the ratchet (306).

2. The self-locking movable elbow according to claim 1, characterized in that, The insertion rod (202) is provided with a movable hole (203), and a pin (208) is slidably connected in the movable hole (203). The self-locking mechanism (2) also includes a pneumatic rod (209) disposed in the insertion rod (202) and a stop (207) for limiting the pin (208). The pneumatic rod (209) is used to elastically push the pin (208) out to engage with the inner wall of the connecting tube (204).

3. A self-locking movable elbow according to claim 2, characterized in that, A support rod (205) is slidably connected inside the insertion rod (202). A locking block (206) is provided on the support rod (205). The top contact surface of the pin (208) and the support rod (205) is provided with a matching chamfer, which is used to retract the pin (208) by the pushing of the support rod (205) when the insertion rod (202) is inserted.

4. A self-locking movable elbow according to claim 3, characterized in that, When the connecting tube 1 (201) is pressed again, the pin (208) locks the middle of the locking block (206), and then the locking block (206) is dragged up. The protrusion of the locking block (206) makes the pin (208) overcome the thrust of the pneumatic rod (209) and remain in a retracted state to achieve disassembly.

5. A self-locking movable elbow according to claim 1, characterized in that, The thread length of the connecting thread one (302) is greater than the thread depth of the internal thread (310) so that the pipe one (301) and the pipe two (308) can still rotate relative to each other after being fully screwed in.

6. A self-locking movable elbow according to claim 1 or 5, characterized in that, The ratchet (306) is fixedly connected to the outer periphery of the second pipe (308), and a fixing block (309) is also fixed on the middle pipe (303). The hook (307) rotates around the fixing block (309).

7. A self-locking movable elbow according to claim 6, characterized in that, The middle tube (303) is provided with an upper slot (304) and a lower slot (305), and the hook (307) has an upper end and a lower end that can be inserted into the upper slot (304) or the lower slot (305) respectively.

8. A self-locking movable elbow according to claim 7, characterized in that, When the upper end of the hook (307) is inserted into the upper slot (304), the hook (307) engages with the ratchet (306) to unidirectionally restrict the rotation of the second pipe (308) and prevent it from rotating in the opposite direction and falling off.

9. A self-locking movable elbow according to claim 8, characterized in that, When the upper end of the hook (307) is pulled out and its lower end is inserted into the lower slot (305), the hook (307) engages with the ratchet (306) to restrict the rotation of the ratchet (306) in the opposite direction, so as to ensure that the second pipe (308) rotates in the disassembly direction.

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