A quick snap structure and a snap joint

Abstract

The present invention discloses a quick snap structure and a snap joint, which relate to the technical field of snap joints and are used for connecting pipe bodies. The structure includes a clamping part and a locking part. A plurality of clamping blocks are evenly arranged along the circumferential direction at the end of the clamping part, and the clamping blocks are clamped with each other when the two clamping parts rotate; the locking part is inserted into the gap between two adjacent clamped clamping blocks for circumferentially limiting the clamping blocks. The snap structure disclosed by the present invention can realize the axial clamping and limiting of the connection structure by setting the rotationally clamped clamping part. At the same time, by setting the locking part to be embedded in the gap between the clamping blocks for circumferential limiting, the firm connection of two snap structures can be realized. Therefore, the present invention does not require a pipe clamp installation device for clamping, nor does it need to use nuts for screwing. The connection process is more convenient and can realize quick connection. When disassembling, first take out the locking part from the gap, and then rotate the clamping part in the reverse direction to separate the two clamped clamping blocks to complete the disassembly. Thus, the disassembly and assembly are very convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary joint connectors, and particularly to a quick rotary clamping structure and a rotary joint connector. Background Art

[0002] The quick rotary joint pipe clamp is a commonly used locking component in the technical field of gas pipeline connections. At present, a sleeve is generally used to lock the rubber hose in a clamping manner. The clamped flexible joint is widely used. In addition to transporting gas, it is also usually used to transport oil and water.

[0003] The current clamped flexible joint generally includes a joint body provided with an axial through hole. One end of the joint body is a hose docking end for connecting to a hose, and the other end of the joint body is a threaded pipe docking end for connecting to a threaded pipe on a device. A nut for connecting to a threaded pipe with an external thread can be axially limited and sleeved on the threaded pipe docking end. When in use, the nut on the threaded pipe docking end is connected to the threaded pipe so that the end face of the threaded pipe docking end is in close contact with the end face of the threaded pipe.

[0004] With the development of society, some technical solutions for improving the traditional clamped flexible joint have gradually emerged in the prior art. For example, in the invention patent with the application number "201420325408.1" and the name "Integrated flexible joint", the inner conical surface of the outer connecting joint is locked by a nut, so that it tightly fits on the outer conical surface of the joint body. At the same time, the O-ring on the outer conical surface is squeezed and deformed, achieving a double sealing effect, thereby achieving a reliable performance of no leakage. After the sleeve is clamped, the winding rubber hose is squeezed and deformed, so that it fills into the teeth of the sleeve and the joint body, integrating into one body, achieving a sealing effect, anti-pulling performance, and preventing dust from entering; in the invention patent with the application number "201120120673.2" and the name "Clamped flexible joint", the nut is a pentagonal nut, and its outer contour is a pentagon with fewer sides. When using a wrench to turn it, even if the force is too large, the edges and corners of the outer side wall of the pentagonal nut will not be worn, so that it can be tightened, making the connection between the flexible joint and the connected part relatively reliable. And a conical surface is provided on the port wall of the through hole at the threaded pipe docking end, which can increase the contact area between the threaded pipe docking end and the sealing ring, making the sealing effect of the sealing ring better.

[0005] However, the above joint structures are complex and the installation is relatively cumbersome, and it is impossible to achieve quick disassembly and assembly.

[0006] Therefore, it is urgent to develop a quick connection joint for rubber hoses that can meet the on-site requirements. Summary of the Invention

[0007] The purpose of the present invention is to provide a quick rotary clamping structure to solve the problems existing in the above prior art, with a simpler structure and capable of achieving the purpose of quick connection.

[0008] To achieve the above object, the present invention provides the following solution: The present invention provides a quick snap structure for connecting a pipe body, including a clamping portion and a locking portion. A plurality of clamping blocks are uniformly arranged along the circumferential direction at the end of the clamping portion. When the two clamping portions rotate, the clamping blocks are clamped with each other; the locking portion is inserted into the gap between two adjacent clamping blocks after clamping, and is used for circumferentially limiting the clamping blocks.

[0009] Preferably, the locking portion is sleeved on the clamping portion, and a locking block is arranged at the end and axially inserted into the gap to circumferentially limit the clamping blocks.

[0010] Preferably, the quick snap structure further includes a limiting portion; the limiting portion is fixed on the clamping portion and is located at the other end of the locking portion, and is used for axially limiting the locking portion.

[0011] Preferably, clamping teeth and clamping grooves are arranged at intervals on the clamping surfaces of a plurality of the clamping blocks. After the two clamping portions rotate and are clamped, the clamping teeth on one clamping block are located in the clamping grooves on the other clamping block.

[0012] Preferably, a guiding groove for guiding the locking block is further arranged axially on the side wall of the clamping portion.

[0013] Preferably, the end of the clamping portion has a sealing surface, and a sealing gasket is further arranged at the sealing surface.

[0014] Preferably, the locking portion is divided into a plurality of locking segments along the circumferential direction, and the plurality of locking segments are spliced and fixed to form the locking portion.

[0015] Preferably, arc-shaped locking grooves are arranged on the outer walls of the locking segments. After being buckled, the plurality of arc-shaped locking grooves are spliced into a circular locking groove, and a locking ring for fixing the plurality of locking segments is arranged in the circular locking groove.

[0016] Preferably, a compression elastic member is further arranged in the locking portion. One end of the compression elastic member abuts against the end of the locking portion, and the other end abuts against the limiting portion; preferably, the limiting portion includes a circlip and / or a snap ring, and the circlip and / or the snap ring is fixed at one end of the locking portion.

[0017] The present invention also discloses a snap joint. One end of the joint is provided with the quick snap structure as described above, and the other end is provided with a connecting portion for connecting a pipe body.

[0018] The present invention has achieved the following technical effects compared with the prior art:

[0019] 1. The rotary clamping structure disclosed in the present invention can achieve axial clamping and limiting of the connection structure by setting a clamping part for rotary engagement. At the same time, a locking part is set to be embedded into the gap between the clamping blocks for circumferential limiting, enabling the two rotary clamping structures to be firmly connected. Therefore, the present invention does not require a pipe clamp installation device for clamping, nor does it need to use nuts for screwing connection. The connection process is more convenient and can achieve rapid connection. When disassembling, first take out the locking part from the gap, and then rotate the clamping part in the reverse direction to separate the two clamped clamping blocks to complete the disassembly. Thus, the disassembly and assembly are very convenient;

[0020] 2. The present invention separates the connection seal of the rotary clamping structure from the connection seals of the pipe body and the joint, thereby changing the seal between the pipe body and the joint to other simpler seal forms, facilitating the adjustment of the pressure on the sealing surface of the pipe body;

[0021] 3. An axial guiding groove for guiding the locking block is further provided on the clamping part of the present invention. The guiding groove is arranged close to the clamping block. It can not only guide the locking block during installation, but also limit the locking block after the connection is completed, preventing the locking part from shaking and ensuring the stability of the connection of the rotary clamping structure;

[0022] 4. In the present invention, the locking part can be formed by splicing several locking sub - bodies, avoiding the situation where it is difficult for the locking part to be sleeved into the end of the clamping part. It can be applied to the situation where the clamping part is fixed on a certain component, such as a pipe port, thereby improving the applicability of the rotary clamping structure in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is the assembly structure schematic diagram of the quick rotary clamping structure of the present invention;

[0025] Figure 2 is Figure 1 the sectional view;

[0026] Figure 3 is the schematic diagram of a joint structure with a clamping part;

[0027] Figure 4 is the schematic diagram of another joint structure with a clamping part;

[0028] Figure 5 is the schematic diagram of the structure of the locking part;

[0029] Figure 6 Schematic diagram of the structure when the locking split body cooperates with the compression spring;

[0030] Wherein, 1, engaging block; 2, locking block; 3, locking end face; 4, engaging teeth; 5, engaging groove; 6, guiding groove; 7, sealing gasket; 8, locking split body; 9, locking ring; 10, snap spring; 11, snap ring; 12, shoulder; 13, compression spring; 14, reverse tooth-like structure. Specific embodiments

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] The purpose of the present invention is to provide a quick snap structure to solve the problems existing in the above-mentioned prior art, with a simpler structure and capable of achieving the purpose of quick connection.

[0033] To make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Embodiment 1:

[0035] As Figures 1 to 6 shown, this embodiment provides a quick snap structure for connecting a pipe body, including an engaging part and a locking part. A plurality of engaging blocks 1 are evenly arranged along the circumferential direction at the end of the engaging part, and the engaging blocks 1 are engaged with each other when the two engaging parts rotate; the locking part is inserted into the gap between two adjacent engaging blocks 1 after engagement for circumferentially limiting the engaging blocks 1.

[0036] During use, the snap structure is arranged at one end of the joint, and the other end of the joint is connected to the pipe body. When connecting, first insert the engaging blocks 1 on the two engaging parts in a staggered manner so that the ends of the engaging parts are in contact with each other, and then rotate the two engaging parts in the reverse direction, and the engaging blocks 1 are engaged with each other; since the engaging blocks 1 on the two engaging parts are rotationally engaged, after engagement, a gap will be formed between the non-engaging surfaces of the adjacent engaging blocks 1 on the two engaging parts. In order to prevent the engaging parts from rotating in the reverse direction and causing the engaging blocks 1 to disengage from the engaged state, after the engaging blocks 1 are engaged, the locking part needs to be inserted into the gap between two adjacent engaging blocks 1 to tightly limit the engaging blocks 1 in the rotational direction.

[0037] The rotary snap structure disclosed in this embodiment can achieve the axial clamping and limiting of the connection structure by setting the engaging parts that rotate and engage. At the same time, by setting the locking part to be embedded in the gap between the snap blocks 1 for circumferential limiting, the two rotary snap structures can be firmly connected. Therefore, in this embodiment, there is no need for a pipe clamp installation device for clamping, nor is it necessary to use nuts for screwing. The connection process is more convenient and can achieve quick connection. When disassembling, first take out the locking part from the gap, and then rotate the engaging part in the reverse direction to separate the two engaged snap blocks 1 to complete the disassembly. Thus, the disassembly and assembly are very convenient.

[0038] To achieve rotary engagement, in this embodiment, one end face of the snap block 1 in the circumferential direction is an engaging surface. On the engaging surface, engaging teeth 4 and engaging grooves 5 are arranged at intervals. After the two engaging parts rotate and engage, the engaging teeth 4 on one snap block 1 are located in the engaging grooves 5 on the other snap block 1 to achieve engaging and locking. Preferably, the surface where the engaging teeth 4 and the engaging grooves 5 cooperate is an inclined surface, which is more convenient for the engaging teeth 4 and the engaging grooves 5 to be tightly clamped with each other. At the same time, the other end face of the snap block 1 in the circumferential direction is a non-engaging surface. A gap is formed between the non-engaging surfaces of the snap blocks 1 for the locking part to be embedded. The non-engaging surface is preferably a plane, and both non-engaging surfaces are arranged axially and are parallel to each other. The axial gap formed between them is more convenient for the locking part to be embedded.

[0039] In this embodiment, two snap blocks 1 are evenly arranged, but in actual design, it is not limited to two, and three or more can be evenly arranged.

[0040] Furthermore, in this embodiment, the engaging part has a channel for the fluid medium to flow through inside, and a sealing surface at the end. A sealing gasket 7 is also arranged at the sealing surface. The sealing of the engaging part is achieved by the extrusion of the sealing gasket 7 at the sealing part, rather than relying on the means of using a sleeve to clamp the tube body of the rubber tube for sealing in the traditional joint. Thus, the connection sealing of the rotary snap structure is separated from the connection sealing of the tube body and the joint. Therefore, the sealing between the tube body and the joint is changed to other simpler sealing forms, such as sleeving the tube body at the end of the joint, and then using a clamp to lock and seal the tube body. This sealing method is simpler and also convenient for adjusting the pressure on the sealing surface of the tube body.

[0041] In this embodiment, a guiding groove 6 for guiding the locking block 2 is further provided along the axial direction on the engaging portion. The guiding groove 6 is arranged close to the engaging block 1 in the circumferential direction, ensuring that when the locking block 2 moves to the end of the guiding groove 6, it can clamp the engaging block 1. Preferably, the guiding groove is coplanar with the non-engaging surface of the engaging block 1. In this embodiment, the locking portion is cylindrical, and has a locking end face 3 at the end. The above-mentioned locking block 2 is arranged on the locking end face 3. The dimension of the locking block 2 in the radial direction is larger than the thickness of other parts of the locking portion, protruding inward. During assembly, the locking portion is sleeved on the engaging portion, and the protrusion cooperates with the guiding groove 6. The worker pushes the locking portion until the locking end face 3 abuts against the end of the engaging block 1, and the locking block 2 axially inserts into the gap between the two engaging blocks 1 after engagement, performing circumferential limitation on the engaging block 1. Preferably, the locking block 2 has an interference fit with the gap, and the locking block 2 is embedded into the gap between the engaging blocks 1. Thus, in this embodiment, by providing the guiding groove 6, not only can the locking block 2 be guided during installation, but after the connection is completed, the guiding groove 6 can also limit the locking block 2, preventing the locking portion from shaking and ensuring the stability of the connection of the rotary clamping structure.

[0042] To axially limit the locking portion, the quick rotary clamping structure disclosed in this embodiment further includes a limiting portion; the limiting portion is fixed on the engaging portion, located at the other end of the locking portion, and clamps the locking portion to prevent the locking portion from axially disengaging.

[0043] To reduce the structural complexity of the locking portion, make the fixation of the locking portion more convenient, and achieve the purpose of quick disassembly and assembly, the limiting portion for axially limiting the locking portion in this embodiment selects a snap ring 10 and / or a retaining ring 11. When the limiting portion is a snap ring 10, it is arranged at the end of the locking portion to axially lock the locking portion. When the limiting portion is a retaining ring 11, its fixing method is the same as that of the snap ring 10. When using the snap ring 10 or the retaining ring 11 simultaneously, first fix the retaining ring 11, and then fix the snap ring 10. The snap ring 10 axially limits both the retaining ring 11 and the locking portion at the same time.

[0044] It should be noted that only using the snap ring 10 or the retaining ring 11 to lock the locking portion requires ensuring that the clamping position of the snap ring 10 or the retaining ring 11 can exactly limit the locking portion well, so the processing accuracy requirements for the engaging portion and the locking portion are relatively high. In this embodiment, there is a gap between the inner wall surface of the locking portion and the outer wall surface of the engaging portion. A compression elastic member is arranged in this gap. One end of the compression elastic member abuts against the locking end face 3 of the locking portion, and the other end abuts against the limiting portion, capable of applying an axially outward elastic force to the locking portion, so that the locking end face 3 and the engaging block 1 always maintain a tightly fitting state, avoiding axial movement of the locking portion. On this premise, there is no requirement for the end face of the locking portion and the end face of the snap ring 10 or the retaining ring 11 to be in complete contact, and there can be a gap, thereby reducing the matching difficulty between the locking portion and the limiting portion. Specifically, the compression elastic portion can be a compression spring 13.

[0045] Those skilled in the art should understand that the limiting part in this embodiment can be either the above-mentioned snap spring 10 and / or snap ring 11, or a structure integrally formed with the engaging part, such as the shoulder 12 provided on the engaging part. The compression elastic part is compressed through the shoulder 12, and at the same time, the snap spring 10 or snap ring 11 can still be combined to axially assist in limiting the locking part, playing a role of "double insurance".

[0046] To facilitate the connection of the pipe body, other boss structures may be provided on the engaging part, and the boss structures may cause a certain obstruction to the locking part, preventing it from being sleeved from one end of the engaging part. Therefore, in order for the locking part to be smoothly sleeved on the outer surface of the engaging part, the locking part is circumferentially divided into several locking sub-bodies 8, and the several locking sub-bodies 8 are spliced to form the locking part. Preferably, the sizes of the locking sub-bodies 8 are equal, and the number is preferably 2; and in order to fix the locking part after the two locking sub-bodies 8 are spliced, arc-shaped locking grooves 5 are provided on the outer walls of the two locking sub-bodies 8. After being buckled, the two arc-shaped locking grooves 5 form a circular locking groove 5, and a locking ring 9 is provided in the circular locking groove 5 to ensure that the locking sub-bodies 8 form a stable structure by using the locking ring 9.

[0047] The rotary snap structures in this embodiment are usually used in combination. One of the two matching rotary snap structures can also be provided at the port of the pipeline or at the exhaust port of the gas cylinder. At this time, for this setting method of the rotary snap structure, the locking sub-bodies 8 must be used to form the locking part.

[0048] Embodiment 2:

[0049] As Figures 1 to 4 shown, this embodiment provides a rotary snap joint. One end of the joint is provided with the above-mentioned quick rotary snap structure, and the other end is provided with a connecting part for connecting the pipe body; the joint can be quickly rotary snap-connected through the quick rotary snap structure, and the connection seal between the pipe body and the joint and the connection seal between the joints are separated, so that a relatively simple sealing means can be adopted to realize the connection seal between the pipe body and the joint, changing the problem in the prior art that when using a sleeve to connect the pipe joint, the connection process is cumbersome and the locking effect between the sleeve and the pipe body is not good due to the need to ensure the connection between the sleeve and the pipe body.

[0050] Furthermore, a reverse-tooth-shaped structure 14 for clamping the flexible pipe body is provided on the connecting part. During use, the flexible pipe body is sleeved on the reverse-tooth-shaped structure 14. In order to further ensure the sealing between the flexible pipe body and the reverse-tooth-shaped structure 14, other fastening elements, such as a clamp, can be provided to clamp the flexible pipe body.

[0051] All adaptive changes made according to actual needs are within the protection scope of the present invention.

[0052] It should be noted that for those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A quick snap - fit structure for connecting pipe bodies, characterized in that, It includes a clamping part and a locking part. A number of clamping blocks are evenly arranged along the circumferential direction at the end of the clamping part, and the clamping blocks are clamped with each other when the two clamping parts rotate; the locking part is inserted into the gap between two adjacent clamping blocks after clamping, and is used for circumferentially limiting the clamping blocks; the locking part is divided into a number of locking segments along the circumferential direction, and the number of locking segments are spliced and fixed to form the locking part; arc-shaped locking grooves are arranged on the outer walls of the locking segments, and after being buckled, a number of the arc-shaped locking grooves are spliced into a circular locking groove, and a locking ring for fixing a number of the locking segments is arranged in the circular locking groove.

2. The quick snap structure according to claim 1, wherein The locking part is sleeved on the clamping part, and a locking block is arranged at the end and axially inserted into the gap to circumferentially limit the clamping blocks.

3. The quick snap structure according to claim 2, wherein The quick-rotation clamping structure further includes a limiting part; the limiting part is fixed on the clamping part and is located at the other end of the locking part, and is used for axially limiting the locking part.

4. The quick snap structure according to claim 3, characterized in that, Clamping teeth and clamping grooves are arranged at intervals on the clamping surfaces of a number of the clamping blocks. After the two clamping parts rotate and are clamped, the clamping teeth on one clamping block are located in the clamping grooves on the other clamping block.

5. The quick snap structure according to claim 4, characterized in that, A guiding groove for guiding the locking block is further arranged axially on the side wall of the clamping part.

6. The quick snap structure according to claim 5, wherein, The end of the clamping part has a sealing surface, and a sealing gasket is also arranged at the sealing surface.

7. The quick snap structure according to any one of claims 3-6, characterized in that, A compression elastic part is further arranged in the locking part. One end of the compression elastic part abuts against the end of the locking part, and the other end abuts against the limiting part.

8. The quick snap structure according to claim 7, characterized in that, The limiting part includes a circlip and / or a snap ring.

9. A rotary card connector, characterized in that, One end of the joint is provided with the quick-rotation clamping structure as described in any one of claims 1-8, and the other end is provided with a connecting part for connecting a pipe body.

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