Quick connecting structure for metal pipe fittings

Abstract

The utility model discloses a quick connecting structure for metal pipe fittings, which relates to the technical field of metal pipe fitting connecting equipment and comprises a first connecting pipe and a second connecting pipe. The quick connecting mechanism is arranged on the outer side of the first connecting pipe and the outer side of the second connecting pipe; according to the utility model, one-key quick connection is realized through the insertion matching of the connecting insertion plate and the connecting insertion groove and the mechanical locking design that the round head jacking column is automatically clamped into the positioning hole under the driving of the spring, and the threaded matching of the locking ring and the second connecting sleeve further limits the displacement of the round head jacking column, so that the mounting efficiency and reliability are obviously improved; in a connection state, the two groups of sealing rubber plugs are separated from the fixed annular plate under the action of the extrusion ejection block, so that the pipeline is communicated, meanwhile, the connection sealing ring is pressed to deform to form end face sealing, double sealing of an internal channel and a connection interface is achieved, the sealing rubber plugs automatically reset to block medium flow during separation, and the leakage risk after disassembly is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal pipe fitting connecting equipment technical field especially relates to a quick connecting structure for metal pipe fitting. BACKGROUND

[0002] Metal pipe fitting is the pipeline connecting assembly made of metal material, is widely used in petroleum, chemical industry, building, machinery and other fields. It adopts stainless steel, carbon steel, copper or aluminum alloy and so on, has high strength, high pressure resistance, corrosion resistance, high temperature resistance and so on, is suitable for the transportation of liquid, gas and special medium. Common types include seamless pipe, welded pipe and precision pipe, are connected through thread, flange or sleeve and so on, can satisfy the sealing, pressure bearing and durability demand under complex working condition, is the core component of industrial pipeline system.

[0003] The existing metal pipe fitting connecting structure depends on bolt fastening or clamp pressure bonding, needs to be aligned and manually tightened one by one during installation, and the operation steps are complex and time-consuming. At the same time, the mechanical locking part lacks self-locking design, and is easy to loosen under vibration or pressure fluctuation, which has the risk of connection failure, and is difficult to meet the requirements of quick disassembly and high rigidity scene. After disassembly, the pipeline port is directly exposed, and the medium residue is easy to leak, which causes hidden troubles to the operation safety and environment, especially not suitable for high-standard sealing requirements in chemical industry, energy and other fields. Therefore, a quick connecting structure for metal pipe fitting is provided to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at: in order to solve the problem put forward in the above background, provide a kind of quick connecting structure for metal pipe fitting, with the advantages of high connection efficiency between metal pipe fittings, good sealing, not easy to leak, solve the problem put forward in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of quick connecting structure for metal pipe fitting, comprising:

[0006] First connecting pipe and second connecting pipe;

[0007] Quick connecting mechanism, the quick connecting mechanism is set on the outer side of first connecting pipe and second connecting pipe, and the quick connecting mechanism is used to quickly connect between first connecting pipe and second connecting pipe;

[0008] Pipe fitting sealing mechanism, the pipe fitting sealing mechanism is set on the inner side of first connecting pipe and second connecting pipe, and the pipe fitting sealing mechanism ensures that only when first connecting pipe and second connecting pipe are connected tightly, the inside is kept open.

[0009] As a further scheme of the utility model: the quick connecting mechanism includes first connecting sleeve pipe and second connecting sleeve pipe, the side of first connecting sleeve pipe close to second connecting sleeve pipe annularly and uniformly is fixedly connected with several groups of connecting plug-in boards, the outside of connecting plug-in board is equipped with positioning hole, the side of second connecting sleeve pipe close to first connecting sleeve pipe is equipped with several groups of connecting insertion slot matched with connecting plug-in board, the inside of connecting insertion slot is equipped with convex slot through to the outside of second connecting sleeve pipe, the inside of convex slot is provided with round head jacks, first spring is fixedly connected between round head jacks and convex slot, the outside of second connecting sleeve pipe is provided with locking ring.

[0010] As a further scheme of the utility model: the pipe sealing mechanism includes fixed ring plate, one end of second spring is fixedly connected with the side of fixed ring plate, the other end of second spring is fixedly connected with extrusion jacks, connecting column is fixedly connected with the side of extrusion jacks, sealing rubber plug is fixedly connected with the other end of connecting column, connecting sealing ring is arranged between first connecting pipe and second connecting pipe.

[0011] As a further scheme of the utility model: first connecting sleeve pipe is fixedly connected with the outside of first connecting pipe, and second connecting sleeve pipe is fixedly connected with the outside of second connecting pipe.

[0012] As a further scheme of the utility model: the round head portion of round head jacks is matched with positioning hole, and first spring is sleeved with the outside of short handle portion of round head jacks, the round head portion of round head jacks is matched with wide mouth portion of convex slot, and short handle portion of round head jacks is matched with narrow mouth portion of convex slot.

[0013] As a further scheme of the utility model: external thread is formed on the outside of second connecting sleeve pipe, internal thread is formed on the inside of locking ring, locking ring is threadedly connected with second connecting sleeve pipe, and when locking ring is rotated to appropriate position, the narrow mouth portion of convex slot can be completely blocked.

[0014] As a further scheme of the utility model: when second spring is naturally elongated without external force, sealing rubber plug is tightly attached to fixed ring plate and seals fixed ring plate.

[0015] As a further scheme of the utility model: the pipe sealing mechanism is provided with two groups, and the inside of first connecting pipe and second connecting pipe is fixedly connected with two groups of fixed ring plates respectively.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] 1. In this utility model, the insertion and engagement of the connecting plate and the connecting slot, as well as the mechanical locking design of the round-headed top column automatically engaging into the positioning hole under the drive of the spring, achieve one-click quick connection. The threaded engagement between the locking ring and the second connecting sleeve further restricts the displacement of the round-headed top column, ensuring connection rigidity, preventing accidental disengagement, and significantly improving installation efficiency and reliability.

[0018] 2. In the connected state, the two sets of sealing plugs are disengaged from the fixed annular plate by the pressure of the top block, allowing the pipeline to pass through. At the same time, the connecting sealing ring is deformed by pressure to form an end face seal, realizing a double seal between the internal channel and the connection interface. When separated, the sealing plugs automatically reset to block the flow of the medium, effectively preventing the risk of leakage after disassembly. It is especially suitable for the transportation of high-pressure and highly corrosive media. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the first connecting sleeve in this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the second connecting sleeve in this utility model;

[0022] Figure 4 This is a schematic diagram of the connecting slot structure in this utility model;

[0023] Figure 5 This is a schematic diagram of the pipe fitting sealing mechanism in this utility model;

[0024] Figure 6 This is a side sectional view of the structure of this utility model.

[0025] In the diagram: 1. First connecting pipe; 2. Second connecting pipe; 3. Quick connection mechanism; 31. First connecting sleeve; 32. Connecting insert plate; 33. Positioning hole; 34. Second connecting sleeve; 35. Connecting slot; 36. Convex groove; 37. Round-headed top post; 38. First spring; 39. Locking ring; 4. Pipe fitting sealing mechanism; 41. Fixed annular plate; 42. Second spring; 43. Extrusion block; 44. Connecting post; 45. Sealing plug; 46. Connecting sealing ring. Detailed Implementation

[0026] 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.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0028] Reference Figures 1 to 6 In this embodiment of the present invention, a quick-connect structure for metal pipe fittings includes:

[0029] First connecting pipe 1 and second connecting pipe 2;

[0030] Quick connection mechanism 3 is provided on the outside of the first connecting pipe 1 and the second connecting pipe 2. Quick connection mechanism 3 is used to quickly connect the first connecting pipe 1 and the second connecting pipe 2.

[0031] The pipe sealing mechanism 4 is provided inside the first connecting pipe 1 and the second connecting pipe 2. The pipe sealing mechanism 4 ensures that the passage inside is maintained only when the first connecting pipe 1 and the second connecting pipe 2 are tightly connected.

[0032] The quick-connect mechanism 3 includes a first connecting sleeve 31 and a second connecting sleeve 34. The first connecting sleeve 31 is fixedly connected to the outside of the first connecting tube 1, and the second connecting sleeve 34 is fixedly connected to the outside of the second connecting tube 2. A plurality of connecting insert plates 32 are uniformly fixedly connected in a ring on the side of the first connecting sleeve 31 near the second connecting sleeve 34. Positioning holes 33 are provided on the outer side of the connecting insert plates 32. A plurality of connecting slots 35 adapted to the connecting insert plates 32 are provided on the side of the second connecting sleeve 34 near the first connecting sleeve 31. A convex groove 36 extending through to the outside of the second connecting sleeve 34 is provided on the inner side of the connecting slot 35. A round-headed top post 37 is provided on the inner side of the convex groove 36. A first spring 38 is fixedly connected between the round-headed top post 37 and the convex groove 36. The round head of the round-headed top post 37 is adapted to the positioning hole 33, and the first spring 38 is sleeved on the outside of the short handle part on the side of the round-headed top post 37. The round head of the round-headed top post 37 is adapted to the wide opening part of the convex groove 36, and the short handle part of the round-headed top post 37 is adapted to the narrow opening part of the convex groove 36. A locking ring 39 is provided on the outside of the second connecting sleeve 34. The outside of the second connecting sleeve 34 is provided with external threads, and the inside of the locking ring 39 is provided with internal threads. The locking ring 39 is threadedly connected to the second connecting sleeve 34, and when the locking ring 39 is rotated to the appropriate position, it can completely block the narrow opening part of the convex groove 36.

[0033] Using the above scheme: During connection, the first connecting tube 1 is inserted into the connecting slot 35 of the second connecting tube 2 through the connecting insert plate 32. When the positioning hole 33 moves to the position aligned with the convex groove 36, the first spring 38 pushes the round head part of the round head pin 37 into the positioning hole 33 to complete the positioning. At this time, tightening the locking ring 39 can completely cover the narrow opening of the convex groove 36, restricting the axial displacement of the short handle part of the round head pin 37 and ensuring a stable connection. When disassembly is required, the locking ring 39 is rotated in the opposite direction to expose the narrow opening of the convex groove 36. The first connecting tube 1 is pulled so that the inner wall of the positioning hole 33 of the connecting insert plate 32 presses the round head of the round head pin 37, forcing the first spring 38 to compress. After the round head part of the round head pin 37 is completely retracted into the convex groove 36, the tubes can be separated.

[0034] The pipe fitting sealing mechanism 4 includes a fixed annular plate 41. One end of a second spring 42 is fixedly connected to the side of the fixed annular plate 41. The other end of the second spring 42 is fixedly connected to a pressing block 43. A connecting post 44 is fixedly connected to the side of the pressing block 43. A sealing plug 45 is fixedly connected to the other end of the connecting post 44. When the second spring 42 naturally extends without being subjected to external force, the sealing plug 45 tightly adheres to the fixed annular plate 41 and seals it. The pipe fitting sealing mechanism 4 is provided with two sets of fixed annular plates 41. The two sets of fixed annular plates 41 are fixedly connected to the inner sides of the first connecting pipe 1 and the second connecting pipe 2, respectively. A connecting sealing ring 46 is provided between the first connecting pipe 1 and the second connecting pipe 2.

[0035] Using the above scheme: When the pipes are not connected, the second spring 42 pushes the sealing plug 45 to press tightly against the fixed annular plate 41 to form a seal. When the first connecting pipe 1 and the second connecting pipe 2 are fully engaged through the quick-connect mechanism 3, the two sets of extrusion blocks 43 press against each other, and the connecting column 44 drives the sealing plug 45 to disengage from the fixed annular plate 41. At this time, the second spring 42 is compressed and stores energy, forming a through channel inside the two pipes. The connecting sealing ring 46 is compressed and deformed when the pipes are joined, achieving a secondary seal at the connection. When the pipes are separated, the second spring 42 resets and pushes the sealing plug 45 to reseal the fixed annular plate 41, blocking the flow of media.

[0036] The working principle of this utility model is as follows:

[0037] When it is necessary to quickly connect metal pipes, the connecting plate 32 of the first connecting pipe 1 is aligned with the connecting slot 35 of the second connecting pipe 2 and inserted. When the connecting plate 32 is fully inserted, the positioning hole 33 on the connecting plate 32 is automatically aligned with the convex groove 36 on the second connecting sleeve 34. At this time, the first spring 38 pushes the round head part of the round head top post 37 to extend outward and lock into the positioning hole 33 to form a mechanical lock and prevent the pipe from axially disengaging.

[0038] Then, the locking ring 39 is rotated so that it moves along the external thread of the second connecting sleeve 34 in the connection direction. When the locking ring 39 moves to completely cover the narrow opening of the convex groove 36, the short shank of the round-headed top post 37 is restricted by the inner wall of the locking ring 39 and cannot extend out of the convex groove 36, thereby ensuring that the locking state of the connecting insert plate 32 and the connecting slot 35 is irreversible and achieving rigid connection fixation.

[0039] When the two tubes are fully connected, the extrusion blocks 43 on the inner side of the first connecting tube 1 and the second connecting tube 2 come into contact with each other and apply pressure. The extrusion blocks 43 drive the sealing plug 45 to move away from the fixed annular plate 41 through the connecting column 44, compressing the second spring 42 and making the internal channels of the two tubes open. At the same time, the end faces of the two tubes press the connecting sealing ring 46, causing it to elastically deform and fill the gap, forming a double sealing effect.

[0040] When it is necessary to unlock two sets of metal pipe fittings, rotate the locking ring 39 in the opposite direction to make it retract to the narrow opening of the convex groove 36. At this time, pull the first connecting pipe 1 outward along the axis. The inner wall of the positioning hole 33 of the connecting plate 32 applies radial pressure to the round head part of the round head pin 37, forcing the round head pin 37 to retract into the convex groove 36. The first spring 38 is compressed. When the round head pin 37 is completely disengaged from the positioning hole 33, the connecting plate 32 can freely exit the connecting slot 35 to achieve pipe fitting separation.

[0041] At the moment the pipe is separated, the pressure between the compression blocks 43 disappears, the second spring 42 resets and pushes the sealing plug 45 to re-adhere to the fixed annular plate 41, blocking the flow of the medium. The connecting sealing ring 46 returns to its original state due to the release of pressure, ensuring that there is no risk of leakage at the pipe end after disassembly.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick coupling structure for a metal pipe, characterized by comprising: The utility model relates to a kind of quick connection pipe fittings, including: First connecting pipe (1) and second connecting pipe (2); Quick connection mechanism (3), the quick connection mechanism (3) is provided outside first connecting pipe (1) and second connecting pipe (2), and the quick connection mechanism (3) is used to quickly connect between first connecting pipe (1) and second connecting pipe (2); Pipe fitting sealing mechanism (4), the pipe fitting sealing mechanism (4) is provided inside first connecting pipe (1) and second connecting pipe (2), and the pipe fitting sealing mechanism (4) ensures that only when first connecting pipe (1) and second connecting pipe (2) are connected tightly, its inside keeps passage.

2. The quick coupling structure for a metal pipe according to claim 1, wherein The quick connection mechanism (3) includes first connecting sleeve (31) and second connecting sleeve (34), the first connecting sleeve (31) is fixedly connected with a plurality of groups of connecting plug-in boards (32) on the side near the second connecting sleeve (34) annularly and uniformly, the connecting plug-in board (32) is provided with positioning hole (33) outside, the second connecting sleeve (34) is provided with a plurality of groups of connecting plug-in slots (35) near the first connecting sleeve (31) side, which are matched with the connecting plug-in board (32), the connecting plug-in slot (35) is provided with convex slot (36) inside and penetrates to the outside of second connecting sleeve (34), the convex slot (36) is provided with round head jacks (37) inside, the first spring (38) is fixedly connected between the round head jacks (37) and convex slot (36), and the second connecting sleeve (34) is provided with locking ring (39) outside.

3. A quick coupling structure for a metal pipe according to claim 2, wherein The pipe fitting sealing mechanism (4) includes fixed annular plate (41), one end of the second spring (42) is fixedly connected with the side surface of the fixed annular plate (41), the other end of the second spring (42) is fixedly connected with extrusion top block (43), the side surface of the extrusion top block (43) is fixedly connected with connecting column (44), the other end of the connecting column (44) is fixedly connected with sealing rubber plug (45), and connecting sealing ring (46) is arranged between the first connecting pipe (1) and the second connecting pipe (2).

4. The quick coupling structure for a metal pipe according to claim 2, wherein The first connecting sleeve (31) is fixedly connected outside the first connecting pipe (1), and the second connecting sleeve (34) is fixedly connected outside the second connecting pipe (2).

5. The quick coupling structure for a metal pipe according to claim 2, wherein The round head part of the round head jacks (37) is matched with the positioning hole (33), and the first spring (38) is sleeved outside the short handle part on the side of the round head jacks (37), the round head part of the round head jacks (37) is matched with the wide mouth part of the convex slot (36), and the short handle part of the round head jacks (37) is matched with the narrow mouth part of the convex slot (36).

6. The quick coupling structure for a metal pipe according to claim 2, wherein The second connecting sleeve (34) is provided with external thread outside, the locking ring (39) is provided with internal thread inside, the locking ring (39) is threadedly connected with the second connecting sleeve (34), and when the locking ring (39) is rotated to the appropriate position, the narrow mouth part of the convex slot (36) can be completely blocked.

7. The quick coupling structure for a metal pipe according to claim 3, wherein When the second spring (42) is naturally elongated without external force, the sealing rubber plug (45) is tightly attached to the fixed annular plate (41) and seals it.

8. The quick coupling structure for a metal pipe according to claim 3, wherein The pipe sealing mechanism (4) is provided with two groups, and the two groups of fixed annular plates (41) are fixedly connected to the inner sides of the first connecting pipe (1) and the second connecting pipe (2) respectively.

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