Quick corrugated pipe for fuel gas conveying

Abstract

The utility model belongs to the technical field of fuel gas pipelines, and particularly relates to a quick corrugated pipe for fuel gas conveying, which comprises a pipe body, a corrugated pipe body and a corrugated pipe body, the outer joint is cylindrical and is arranged at one end of the pipe body, and an outer flange which extends firstly and is in contact with the limiting edge is arranged on the outer joint; the inner connector is arranged outside the pipe body and matched with the outer connector, one end of the inner connector is provided with a threaded head connected with the inner connector, a through hole for the pipe body to penetrate through is formed in the inner connector, and a sealing ring is arranged between the inner connector and the outer connector; the sealing structure is arranged between the outer joint and the inner joint and wraps the pipe body; wherein a protective sleeve is further arranged outside the pipe body, and the inner connector is wrapped outside the protective sleeve. The pipe joint has the beneficial effects that the sealing structure is arranged between the outer joint and the inner joint, is arranged outside the pipe body and is fixed outside the pipe body under the action of the inner joint and the outer joint, so that the overall sealing performance can be effectively improved.

Description

Technical Field

[0001] This application belongs to the technical field of gas pipelines, and particularly relates to a quick corrugated pipe for gas transportation. Background Art

[0002] With the progress of society, gaseous fuels as commodities have entered ordinary households through pipelines. Among them, the corrugated pipe for connecting gas appliances is used to connect the main gas pipeline and the gas stove, and the transportation of gas, liquefied petroleum gas or biogas between the main gas pipeline and the gas stove is completed through the corrugated pipe section. During use, the flexible bending of the corrugated pipe section is used to transport gas in a tortuous path.

[0003] The patent with the publication number CN101649937B discloses a quick joint for a corrugated pipe for gas, belonging to the technical field of gas. It solves the problems that in the existing quick joint for gas, the corrugated pipe needs to be deformed during quick installation and the installation is troublesome. This quick joint for a corrugated pipe for gas includes a corrugated pipe, a locking nut and a joint with a connection hole. A sealing washer and a clamping sleeve that can be buckled in the wave trough of the corrugated pipe are sleeved on the corrugated pipe. One end of the corrugated pipe sequentially passes through the above clamping sleeve and sealing washer and extends into the connection hole of the joint. One end of the locking nut is screwed on the outside of the joint, and the other end is limited on the outer peripheral surface of the clamping sleeve through a limiting structure. A first step is provided on the inner wall of the connection hole. The inner end of the sealing washer is provided with an inclined surface, and this inclined surface can extend into the connection hole and abut against the above first step. An annular groove is provided on the outer peripheral surface of the sealing washer.

[0004] The above patent forms a secondary seal by the second step on the outer peripheral surface of the sealing washer abutting against one end face of the joint to improve the sealing effect of the whole structure. However, in actual use, there will still be a problem of loosening after long-term use, resulting in insufficient sealing effect, which needs to be improved. Utility Model Content

[0005] The purpose of this application is to provide a quick corrugated pipe for gas transportation, which can solve the above problems.

[0006] The purpose of this application is to provide a quick corrugated pipe for gas transportation, including:

[0007] A pipe body, with a limiting edge provided at its end;

[0008] An outer joint, in a cylindrical shape and provided at one end of the pipe body. An outer retaining edge extending forward and contacting the limiting edge is provided on the outer joint;

[0009] An inner joint, provided outside the pipe body and cooperating with the outer joint. One end of it is provided with a threaded head connected to the inner joint. A through hole for the pipe body to pass through is provided inside, and a sealing ring is provided between the inner joint and the outer joint;

[0010] A sealing structure is arranged between the outer joint and the inner joint and wraps around the outer tube body.

[0011] Wherein, a protective sleeve is further arranged outside the tube body, and the inner joint wraps around the outside of the protective sleeve.

[0012] For a rapid corrugated pipe for gas transmission as described above, by arranging a limiting edge at the end of the pipe body, with a 90° angle between the limiting edge and the pipe body, the arrangement of the limiting edge can not only enhance the structural strength of the pipe body but also cooperate with the outer joint and the sealing structure to improve the overall sealing effect. By arranging a sealing structure between the outer joint and the inner joint, the sealing structure is arranged outside the pipe body and is fixed outside the pipe body under the action of the inner joint and the outer joint, which can effectively improve the overall sealing performance. At the same time, by arranging a sealing ring between the inner joint and the outer joint, the sealing effect can be further improved. In addition, during assembly, only the inner joint and the outer joint need to be screwed together, which is fast and convenient.

[0013] Further, the sealing structure includes a first seal, a second seal, and a third seal arranged in sequence from top to bottom. The top of the first seal contacts the limiting edge, and the bottom of the third seal contacts the inner joint.

[0014] By arranging the first seal, the second seal, and the third seal in sequence, the three are arranged in order to jointly form a complete sealing system. The first seal contacts the limiting edge, which can play a role in isolation, protection, and sealing, and can prevent the direct contact between the inner joint and the limiting edge. The second seal is located between the first and third seals and plays a role in enhancing the sealing effect. The third seal contacts the inner joint, and the two are closely fitted to further improve the sealing effect and prevent leakage.

[0015] Further: The first seal includes:

[0016] A cylinder body, one end of which is provided with a rounded corner adapted to the limiting edge, and the other end contacts the second seal;

[0017] Grooves are arranged on the inner wall of the cylinder body. Protrusions are formed between adjacent grooves, and both the grooves and the protrusions are adapted to the pipeline body;

[0018] Wherein, an annular groove is further arranged on the outer wall of the cylinder body and is recessed inward.

[0019] By arranging a rounded corner adapted to the limiting edge at one end of the cylinder body, the cylinder body can be more closely fitted to the limiting edge and prevent the limiting edge from contacting the inner joint, thereby improving the sealing effect. By arranging protrusions and grooves adapted to the pipe body on the inner wall of the cylinder body, the overall force can be more evenly distributed. The cooperation of the protrusions and grooves can make the connection more stable, not prone to looseness, and further improve the sealing effect. The annular groove opened on the outer wall can improve the deformation ability of the first seal and facilitate installation.

[0020] Further, the second seal includes:

[0021] A ring body sleeved outside the pipe body;

[0022] A connection groove provided on the inner wall of the ring body and adapted to the pipe body;

[0023] Wherein, both ends of the ring body are respectively in end-to-end contact with the first seal and the third seal.

[0024] The ring body is sleeved outside the pipe body and adapted to the outer wall of the pipe body, which can ensure the sealing performance between the second seal and the pipe body. At the same time, by providing a connection groove on the ring body, the inner walls of the two inner grooves are closely attached to the outer wall of the pipe body, which can further improve the sealing effect. And both ends of the ring body are respectively in end-to-end contact with the first seal and the third seal, which is used for the first seal and the third seal, making the overall structure of the sealing structure more stable.

[0025] Further, the third seal includes:

[0026] A seal body sleeved outside the pipe body and forming a cavity with the pipe body;

[0027] A connecting convex ring provided at one end of the seal body, and a clamping groove adapted to the connecting convex ring is provided on the second seal;

[0028] A locking convex ring provided on the outer wall of the seal body, and a limiting groove adapted to the locking convex ring is provided on the outer wall of the outer joint;

[0029] Wherein, the cross section of the locking convex ring is triangular.

[0030] During the installation process, the third seal is affected by the inner joint and squeezes the second seal and the first seal, making the overall sealing structure tighter. The connecting convex ring is snapped into the connecting clamping groove, and at the same time, the locking convex ring is snapped into the limiting groove, thereby fixing the position between the third seal and the outer joint. Even without the inner joint, the second seal and the first seal can be fixed by virtue of the third seal, thereby maintaining the sealing performance while ensuring the overall connection stability and structural strength. In addition, the cross section of the locking convex ring is triangular, and its right-angle side abuts against the limiting groove, playing a limiting role to prevent the locking convex ring from easily detaching.

[0031] Further, an installation groove is provided on the inner wall of the inner joint, and a fourth seal is provided in the installation groove. The fourth seal includes a support body and a plurality of annular rings provided on the support body, and the annular rings are in contact with the outer wall of the protective sleeve.

[0032] By providing an installation groove above the interior of the inner joint and arranging a fourth sealing ring within the installation groove, the fourth sealing ring closely adheres to the outer wall of the protective sleeve by means of multiple annular rings, which can effectively improve the sealing effect. The spacing between multiple annular rings is less than the thickness of a single annular ring, enabling the multiple annular rings on the fourth sealing member to function as multiple sealing rings during deformation, thus having a good sealing effect. In addition, the fourth sealing member is made of silicone material, which can save materials while ensuring the sealing performance and effectively prevent gas leakage.

[0033] The beneficial effects of this application are as follows:

[0034] 1. By providing a sealing structure between the outer joint and the inner joint, the sealing structure is arranged outside the pipe body and fixed outside the pipe body under the action of the inner joint and the outer joint, which can effectively improve the overall sealing performance. Meanwhile, by arranging a sealing ring between the inner joint and the outer joint, the sealing effect can be further enhanced;

[0035] 2. By sequentially arranging the first sealing member, the second sealing member, and the third sealing member, the three are arranged in sequence to jointly form a complete sealing system. The first sealing member contacts the limiting edge, which can play roles of isolation, protection, and sealing, and can prevent direct contact between the inner joint and the limiting edge. The second sealing member is located between the first and third sealing members, playing a role in enhancing the sealing effect. The third sealing member contacts the inner joint, and the two are closely fitted to further improve the sealing effect and prevent leakage;

[0036] 3. By providing an installation groove above the interior of the inner joint and arranging a fourth sealing ring within the installation groove, the fourth sealing ring closely adheres to the outer wall of the protective sleeve by means of multiple annular rings, which can effectively improve the sealing effect. The spacing between multiple annular rings is less than the thickness of a single annular ring, enabling the multiple annular rings on the fourth sealing member to function as multiple sealing rings during deformation, thus having a good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural diagram of the present utility model;

[0038] Figure 2 is a cross-sectional view of the present utility model;

[0039] Figure 3 is Figure 2 an enlarged view of A in

[0040] Figure 4 is Figure 2 an enlarged view of B in

[0041] The reference numerals in the figure are: 100, pipe body; 110, limiting edge; 120, protective sleeve; 200, outer joint; 210, outer retaining edge; 300, inner joint; 310, threaded head; 320, through hole; 330, sealing ring; 340, installation groove; 350, fourth seal; 351, support body; 352, annular ring; 400, first seal; 410, cylinder body; 411, fillet; 420, clamping groove; 421, protrusion; 430, annular groove; 500, second seal; 510, ring body; 520, connecting groove; 600, third seal; 610, seal body; 611, cavity; 620, connecting convex ring; 621, groove; 630, locking convex ring; 631, limiting groove. Detailed implementation mode

[0042] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0043] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. generally belong to the same category, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0044] Next, in conjunction with the accompanying drawings, the quick corrugated pipe for gas transmission provided by the embodiments of the present application will be described in detail through specific embodiments and their application scenarios.

[0045] Embodiment 1:

[0046] As Figures 1 to 4 shown, the embodiment of the present application provides a quick corrugated pipe for gas transmission, including:

[0047] A pipe body 100, with a limiting edge 110 provided at its end;

[0048] An outer joint 200, in a cylindrical shape and disposed at one end of the pipe body 100, and an outer retaining edge 210 extending forward and contacting the limiting edge 110 is provided on the outer joint 200;

[0049] The internal joint 300 is arranged outside the pipe body 100 and cooperates with the external joint 200. One end of the internal joint 300 is provided with a threaded head 310 connected to the internal joint 300. A through hole 320 for the pipe body 100 to pass through is arranged inside. And a sealing ring 330 is arranged between the internal joint 300 and the external joint 200;

[0050] The sealing structure is arranged between the external joint 200 and the internal joint 300 and wraps outside the pipe body 100;

[0051] Wherein, a protective sleeve 120 is further arranged outside the pipe body 100, and the internal joint 300 is wrapped outside the protective sleeve 120.

[0052] In some embodiments of the present application, as Figure 1 shown, by using the above-mentioned quick bellows for gas transmission, by arranging a limiting edge 110 at the end of the pipe body 100, the limiting edge 110 forms a 90° angle with the pipe body 100. The setting of the limiting edge 110 can not only enhance the structural strength of the pipe body 100 but also cooperate with the external joint 200 and the sealing structure to improve the overall sealing effect. By arranging a sealing structure between the external joint 200 and the internal joint 300, the sealing structure is arranged outside the pipe body 100 and is fixed outside the pipe body 100 under the action of the internal joint 300 and the external joint 200, which can effectively improve the overall sealing performance. At the same time, by arranging a sealing ring 330 between the internal joint 300 and the external joint 200, the sealing effect can be further improved. In addition, during assembly, only the internal joint 300 and the external joint 200 need to be screwed together, which is fast and convenient.

[0053] An installation groove 340 is arranged on the inner wall of the internal joint 300. A fourth sealing member 350 is arranged in the installation groove 340. The fourth sealing member 350 includes a support body 351 and a plurality of annular rings 352 arranged on the support body 351. The annular rings 352 are in contact with the outer wall of the protective sleeve 120.

[0054] By arranging the installation groove 340 above the inside of the internal joint 300 and arranging the fourth sealing ring 330 in the installation groove 340, the fourth sealing ring 330 is closely attached to the outer wall of the protective sleeve 120 by relying on a plurality of annular rings 352, which can effectively improve the sealing effect. The distance between the plurality of annular rings 352 is less than the thickness of a single annular ring 352, so that the plurality of annular rings 352 on the fourth sealing member 350 are equivalent to a plurality of sealing rings 330 during deformation and have a good sealing effect. In addition, the fourth sealing member 350 is made of silica gel material, which can save materials while ensuring the sealing performance and effectively prevent gas leakage.

[0055] Embodiment 2:

[0056] The embodiment of the present application provides a quick bellows for gas transmission. In addition to the above technical features, the quick bellows for gas transmission in the embodiment of the present application further includes the following technical features.

[0057] As Figure 2 shown, the sealing structure includes a first seal 400, a second seal 500, and a third seal 600 arranged in sequence from top to bottom. The top of the first seal 400 contacts the limiting edge 110, and the bottom of the third seal 600 contacts the inner joint 300.

[0058] In the embodiment of the present application, by sequentially arranging the first seal 400, the second seal 500, and the third seal 600, the three are arranged in order and jointly form a complete sealing system. The first seal 400 contacts the limiting edge 110, which can play a role of isolation, protection, and sealing, and can prevent the direct contact between the inner joint 300 and the limiting edge 110. The second seal 500 is located between the first and third seals 600 and plays a role in enhancing the sealing effect. The third seal 600 contacts the inner joint 300, and the two are closely fitted, further improving the sealing effect and preventing leakage.

[0059] Embodiment 3:

[0060] The embodiment of the present application provides a quick bellows for gas transmission. In addition to the above technical features, the quick bellows for gas transmission in the embodiment of the present application further includes the following technical features.

[0061] As Figure 2 and Figure 3 shown, the first seal 400 includes:

[0062] A cylinder body 410, one end of which is provided with a rounded corner 411 adapted to the limiting edge 110, and the other end contacts the second seal 500;

[0063] A groove 621 is provided on the inner wall of the cylinder body 410. A protrusion 421 is formed between adjacent grooves 621, and both the groove 621 and the protrusion 421 are adapted to the pipeline body;

[0064] Wherein, an annular groove 430 is further provided on the outer wall of the cylinder body 410 and is recessed inward.

[0065] In the embodiment of the present application, by providing a rounded corner 411 adapted to the limiting edge 110 at one section of the cylinder body 410, the cylinder body 410 can be more closely attached to the limiting edge 110, and contact between the limiting edge 110 and the inner joint 300 can be prevented, thereby improving the sealing effect. By providing a protrusion 421 and a groove 621 adapted to the pipe body 100 on the inner wall of the cylinder body 410, the overall force can be more evenly distributed. The cooperation of the protrusion 421 and the groove 621 can make the connection more stable, not prone to looseness, and further improve the sealing effect. The annular groove 430 opened on the outer wall can improve the deformation ability of the first seal 400, facilitating installation.

[0066] Example 4:

[0067] The embodiment of the present application provides a quick corrugated pipe for gas transmission. In addition to including the above technical features, the quick corrugated pipe for gas transmission in the embodiment of the present application further includes the following technical features.

[0068] As Figure 2 and Figure 3 shown, the second seal 500 includes:

[0069] A ring body 510 sleeved outside the pipe body 100;

[0070] A connection groove 520 provided on the inner wall of the ring body 510 and adapted to the pipe body 100;

[0071] Wherein, both ends of the ring body 510 are respectively in abutting connection with the ends of the first seal 400 and the third seal 600.

[0072] In the embodiment of the present application, the ring body 510 is sleeved outside the pipe body 100 and adapted to the outer wall of the pipe body 100, which can ensure the sealing performance between the second seal 500 and the pipe body 100. At the same time, by opening a connection groove 520 on the ring body 510, the inner walls of the two inner grooves are in close contact with the outer wall of the pipe body 100, which can further improve the sealing effect. Both ends of the ring body 510 are respectively in abutting connection with the ends of the first seal 400 and the third seal 600, which is used to connect the first seal 400 and the third seal 600, making the overall structure of the sealing structure more stable.

[0073] Example 5:

[0074] The embodiment of the present application provides a quick corrugated pipe for gas transmission. In addition to including the above technical features, the quick corrugated pipe for gas transmission in the embodiment of the present application further includes the following technical features.

[0075] As Figure 2 and Figure 3 shown, the third seal 600 includes:

[0076] The seal body 610 is sleeved outside the pipe body 100 and forms a cavity 611 between the seal body and the pipe body 100;

[0077] The connecting convex ring 620 is arranged at one end of the seal body 610, and a clamping groove 420 adapted to the connecting convex ring 620 is arranged on the second seal 500;

[0078] The locking convex ring 630 is arranged on the outer wall of the seal body 610, and a limiting groove 631 adapted to the locking convex ring 630 is arranged on the outer wall of the outer joint 200;

[0079] Wherein, the cross section of the locking convex ring 630 is triangular.

[0080] In the embodiment of the present application, during the installation process, the third seal 600 is affected by the inner joint 300 to squeeze the second seal 500 and the first seal 400, making the overall sealing structure tighter. The connecting convex ring 620 is snapped into the connecting clamping groove 420. At the same time, the locking convex ring 630 is snapped into the limiting groove 631, thereby fixing the position between the third seal 600 and the outer joint 200. Even without the inner joint 300, the second seal 500 and the first seal 400 can be fixed by virtue of the third seal 600, thus ensuring the overall connection stability and structural strength while maintaining the sealing performance. In addition, the cross section of the locking convex ring 630 is triangular, and its right-angle side abuts against the limiting groove 631, playing a limiting role to prevent the locking convex ring 630 from easily detaching.

[0081] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0082] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A fast bellows for gas transportation, characterized in that: include: The tube body (100) has a limited edge (110) disposed at its end; The external joint (200) is cylindrical and is arranged at one end of the pipe body (100); the external joint (200) is provided with an outer retaining edge (210) extending forward and contacting the limiting edge (110); An inner joint (300) is arranged outside the pipe body (100) and cooperates with the outer joint (200), one end of which is provided with a threaded head (310) connected to the inner joint (300), an inner portion of which is provided with a through hole (320) for the pipe body (100) to pass through, and a sealing ring (330) is provided between the inner joint (300) and the outer joint (200); A sealing structure, arranged between the outer joint (200) and the inner joint (300) and wrapped around the outside of the pipe body (100); A protective sleeve (120) is further provided outside the pipe body (100), and the inner joint (300) is wrapped outside the protective sleeve (120).

2. A fast bellows for gas transportation according to claim 1, characterized in that: The sealing structure comprises a first sealing member (400), a second sealing member (500) and a third sealing member (600) which are arranged in sequence from top to bottom, the top of the first sealing member (400) contacts the limiting edge (110), and the bottom of the third sealing member (600) contacts the inner joint (300).

3. A fast bellows for gas transportation according to claim 2, characterized in that: The first sealing member (400) comprises: A cylindrical body (410), one end of which is provided with a rounded corner (411) adapted to the limiting edge (110), and the other end of which is in contact with the second sealing member (500); The grooves (621) are arranged on the inner wall of the cylinder (410), protrusions (421) are formed between adjacent grooves (621), and both the grooves (621) and the protrusions (421) are adapted to the pipeline body; Wherein, an inwardly recessed annular groove (430) is also provided on the outer wall of the cylinder (410).

4. A fast bellows for gas transportation according to claim 3, characterized in that: The second sealing member (500) comprises: A ring body (510) is sleeved outside the tube body (100); A connecting groove (520) is provided on the inner wall of the ring body (510) and is adapted to fit the tube body (100); Wherein, the two ends of the ring body (510) are respectively abutted against the ends of the first sealing member (400) and the third sealing member (600).

5. A fast bellows for gas transportation according to claim 4, characterized in that: The third sealing member (600) comprises: A sealing body (610) is sleeved outside the tube body (100) and forms a cavity (611) with the tube body (100); A connecting convex ring (620) is arranged at one end of the sealing member body (610), and a clamping groove (420) adapted to the connecting convex ring (620) is arranged on the second sealing member (500); A locking convex ring (630) is arranged on the outer wall of the sealing element body (610), and a limiting groove (631) adapted to the locking convex ring (630) is arranged on the outer wall of the external joint (200); The locking protruding ring (630) has a triangular cross section.

6. A fast bellows for gas transportation according to claim 5, characterized in that: The inner wall of the inner joint (300) is provided with a mounting groove (340), a fourth sealing member (350) is provided in the mounting groove (340), the fourth sealing member (350) comprises a support body (351) and a plurality of annular rings (352) provided on the support body (351), the annular rings (352) being in contact with the outer wall of the protective sleeve (120).

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