Anti-loose metal clamping sleeve type sealing joint combination

Abstract

The invention discloses an anti-loose metal clamping sleeve type sealing joint combination, and relates to the technical field of sealing joints. The anti-loose metal clamping sleeve type sealing joint combination comprises a joint body and a welding transition joint, the welding transition joint is connected to one end of the joint body, an annular groove is formed in the inner side wall of the end of the joint body, the diameter of the annular groove is matched with the outer diameter of the welding transition joint, the welding transition joint is inserted into the annular groove, and the welding transition joint is connected with the end of the joint body. A trumpet-shaped limiting groove expanding outwards is formed in a groove opening of the annular groove; the welding transition joint is sleeved with a locknut, the locknut is in sliding connection with the welding transition joint, a first threaded section in an external thread shape is arranged on the outer side of the joint body, the locknut is in threaded connection with the joint body, and a clamping sleeve is arranged between the inner wall of the locknut and the outer wall of the welding transition joint. A conical cutting edge is arranged at the end, close to the connector body, of the clamping sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of sealing joints, and in particular to an anti-loosening metal ferrule type sealing joint combination. Background Art

[0002] At present, the joint seal used in the vehicle braking system is a rubber seal, which is prone to leakage in the extremely cold winter climate. When the vehicle is operated in a high temperature environment, the rubber is prone to aging, plastic deformation and other defects, which reduces the service life of the rubber ring or easily causes leakage problems. Summary of the invention

[0003] To this end, an embodiment of the present invention provides an anti-loosening metal ferrule type sealing joint combination to solve the problems existing in the above-mentioned technology.

[0004] In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:

[0005] A loose-proof metal ferrule sealing joint assembly, comprising a joint body and a welding transition joint, wherein the welding transition joint is connected to one end of the joint body, an annular groove is provided on the inner side wall of the end of the joint body, the diameter of the annular groove is matched with the outer diameter of the welding transition joint, and the welding transition joint is inserted into the annular groove, and an outwardly expanding trumpet-shaped limiting groove is provided at the notch of the annular groove;

[0006] The welding transition joint is provided with a lock nut, which is slidably connected to the welding transition joint. A first threaded section in the shape of an external thread is provided on the outer side of the joint body. The lock nut is threadedly connected to the joint body. A ferrule is provided between the inner wall of the lock nut and the outer wall of the welding transition joint, and a conical cutting edge is provided on one end of the ferrule close to the joint body.

[0007] Optionally, the width of the annular groove is adapted to the wall thickness of the welding transition joint.

[0008] Optionally, the anti-loosening nut is a single nut structure;

[0009] The anti-loosening nut includes an annular first connecting portion, which is sleeved on the welding transition joint. The outer side of the first connecting portion extends toward one side of the joint body to form an annular second connecting portion, and the inner diameter of the second connecting portion is larger than the inner diameter of the welding transition joint. The inner diameter of the second connecting portion is adapted to the outer diameter of the joint body. A second threaded section is provided on the inner side wall of the second connecting portion. The anti-loosening nut is threadedly connected to the first threaded section on the joint body through the second threaded section. When the joint body is rotated, the first connecting portion slides on the welding transition joint and drives the ferrule to move toward one side of the joint body.

[0010] Optionally, the anti-loosening nut is a double nut structure;

[0011] The anti-loosening nut comprises a fastening nut and a locking nut, one end of the fastening nut protrudes outwardly along the axial direction to form a fixing section, the inner diameter of the fixing section is the same as the inner diameter of the fastening nut, and the inner walls of the fastening nut and the fixing section are provided with a continuous third thread section that matches the first thread section, the outer diameter of the fixing section is provided with a fourth thread section, one end of the locking nut is recessed inward to form a locking section, the outer diameter of the locking section is the same as the outer diameter of the locking nut, the inner diameter of the locking section is smaller than the inner diameter of the locking nut and the same as the outer diameter of the fixing section, the inner wall of the locking section is provided with a fifth thread section that matches the third thread section, and the inner wall of the locking nut is provided with a sixth thread section that matches the first thread section;

[0012] The fastening nut is threadedly connected to the locking nut via the fourth thread segment and the fifth thread segment, the fastening nut is threadedly connected to the first thread segment on the joint body via the third thread segment, and the locking nut is threadedly connected to the first thread segment on the joint body via the sixth thread segment.

[0013] Optionally, the ferrule includes an annular sliding portion, which is sleeved between the anti-loosening nut and the welding transition joint. The thickness of the sliding portion gradually decreases at one end close to the joint body to form a conical cutting edge structure, and the conical cutting edge structure is adapted to the shape of the limiting groove.

[0014] Optionally, the ferrule is connected between the joint body and the welding transition joint by cutting edge interference fit.

[0015] Optionally, an outer side of the fastening nut and / or an outer side of the locking nut are provided with an arrow mark representing the direction in which the nut is screwed in.

[0016] Optionally, the ferrule is made of stainless steel.

[0017] Optionally, both the fastening nut and the locking nut are provided with alignment marks, and the positions corresponding to the two alignment marks are the locking positions of the nuts.

[0018] Optionally, the fastening nut and the locking nut are provided with pairing marks for pairing.

[0019] The present invention has at least the following beneficial effects:

[0020] The present invention provides a joint body and a welding transition joint, the welding transition joint is inserted into the annular groove on the joint body, and is threadedly connected to the joint body through a lock nut on the welding transition joint. The lock nut is rotated to slide on the welding transition joint, driving the ferrule inside the lock nut to move toward one side of the joint body, and the front end of the conical cutting edge of the lock ferrule is plastically deformed to be inserted into the limiting groove on the joint body, and tightly cooperates with the limiting groove, thereby achieving a sealing effect.

[0021] By making the ferrule of stainless steel, the ferrule is not easily affected by changes in ambient temperature, thereby ensuring the sealing effect, and has particularly good high and low temperature resistance, thereby increasing the service life of the ferrule and reducing the number of maintenance times.

[0022] By setting the anti-loosening nut as a double nut structure, the fastening nut and the locking nut are threadedly connected to form a second friction surface, and the fastening nut and the locking nut are both threadedly connected to the joint body to form a second friction surface. After the fastening nut and the locking nut are screwed in, when impact and vibration loads act, the friction force of the first friction surface will decrease and disappear, but at the same time, the first nut will be compressed, causing the friction force of the second friction surface to further increase. The nut must overcome the first friction force and the second friction force to loosen. Since the second friction force increases while the first friction force decreases, the anti-loosening effect can be improved.

[0023] By setting a welding transition joint, installation is made easier, costs are reduced, and it can be adapted to various types of pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly explain the prior art and the present invention, the following briefly introduces the drawings required for describing the prior art and the embodiments of the present invention. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other drawings can be derived from the provided drawings without creative work.

[0025] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0026] Figure 1 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of Embodiment 2 of the present invention;

[0028] Figure 3 for Figure 1 The enlarged structural diagram of part A in the middle;

[0029] Figure 4 The figure is a schematic diagram of the matching structure of a ferrule and a connector body according to an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1. Joint body; 2. Welding transition joint; 3. Annular groove; 4. Limiting groove; 5. Anti-loosening nut; 51. First connecting part; 52. Second connecting part; 53. Fastening nut; 54. Locking nut; 55. Fixed section; 56. Locking section; 6. Ferrule; 61. Sliding part; 62. Conical cutting edge. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] In the description of the present invention, unless otherwise specified, "plurality" means two or more. The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are intended to distinguish the objects referred to. For schemes with a sequential flow, this terminology does not have to be understood as describing a specific order or sequence. For schemes with device structures, this terminology does not distinguish between importance, positional relationships, etc.

[0034] In addition, the terms "comprises", "has" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that have been explicitly listed, but may also include other steps or units that are not explicitly listed but are inherent to these processes, methods, products or apparatuses, or steps or units that are added based on further optimization schemes conceived by the present invention.

[0035] Example 1

[0036] like Figure 1 , Figure 3 and Figure 4 As shown, a locking sleeve 6-type sealing joint disclosed in the present invention comprises a joint body 1 and a welding transition joint 2, wherein the welding transition joint 2 is connected to one end of the joint body 1, and an annular groove 3 is provided on the inner side wall of the end of the joint body 1, wherein the diameter of the annular groove 3 matches the outer diameter of the welding transition joint 2, and the welding transition joint 2 is inserted into the annular groove 3, and an outwardly expanding trumpet-shaped limiting groove 4 is provided at the notch of the annular groove 3;

[0037] The welding transition joint 2 is provided with a lock nut 5, and the lock nut 5 is slidably connected to the welding transition joint 2. The outer side of the joint body 1 is provided with a first thread section in the shape of an external thread, and the lock nut 5 is threadedly connected to the joint body 1. A ferrule 6 is provided between the inner wall of the lock nut 5 and the outer wall of the welding transition joint 2, and the ferrule 6 is provided with a conical cutting edge 62 at one end close to the joint body 1.

[0038] The joint body 1 can be a straight-through, tee-through or other pipeline structure. In this embodiment, it is a tee-through structure. One end of the welded transition joint 2 is connected to the joint body 1, and the other end is welded to the pipeline.

[0039] The specific connection structure of the welding transition joint 2 and the joint body 1 is as follows: an annular groove 3 is opened on the inner wall of the joint body 1, and the difference between the radius of the annular groove 3 on the joint body 1 and the inner diameter of the joint body 1 is the wall thickness of the welding transition joint 2. After the welding transition joint 2 is inserted into the joint body 1, it is just placed in the annular groove 3 and the inner walls of the two are flush. Then, an outward-expanding flare structure (conical) is opened on one side of the annular groove 3 at a distance from the end of the joint body 1 as a limit groove 4 of the ferrule 6;

[0040] To install the welding transition joint 2, first put the anti-loosening nut 5 on the welding transition joint 2. The anti-loosening nut 5 is a U-shaped structure, and a second thread segment is arranged on the inner side wall thereof, which is used to connect with the first thread segment on the outer side wall of the joint body 1. The anti-loosening nut 5 can be moved along the welding transition joint 2 toward the side of the joint body 1 by rotating the anti-loosening nut 5.

[0041] An annular gap is provided between the U-shaped locking nut 5 and the side wall of the welding transition joint 2, and the ferrule 6 is provided in the gap. The locking nut 5 is moved to drive the ferrule 6 to move toward one side of the joint body 1;

[0042] It should be noted that, when in use, the anti-loosening nut 5 and the ferrule 6 are both pre-installed on the welding transition joint 2.

[0043] The specific structure of the anti-loosening nut 5 is as follows: the anti-loosening nut 5 includes an annular first connecting portion 51, the first connecting portion 51 is sleeved on the welding transition joint 2, the outer side of the first connecting portion 51 extends toward one side of the joint body 1 to form an annular second connecting portion 52, and the inner diameter of the second connecting portion 52 is larger than the inner diameter of the welding transition joint 2, the inner diameter of the second connecting portion 52 is adapted to the outer diameter of the joint body 1, and a second threaded section is provided on the inner side wall of the second connecting portion 52, the anti-loosening nut 5 is threadedly connected with the first threaded section on the joint body 1 through the second threaded section, and the joint body 1 is rotated, the first connecting portion 51 slides on the welding transition joint 2, and drives the ferrule 6 to move toward one side of the joint body 1;

[0044] The ferrule 6 includes an annular sliding portion 61, which is sleeved between the locking nut 5 and the welding transition joint 2. The thickness of the sliding portion 61 at one end close to the joint body 1 gradually decreases to form a tapered cutting edge 62 structure, and the tapered cutting edge 62 structure is adapted to the shape of the limiting groove 4. The ferrule 6 is connected between the joint body 1 and the welding transition joint 2 by cutting edge interference fit.

[0045] The ferrule 6 is divided into two parts, one part is an annular sliding part 61, which can move along the outer side of the welding transition joint 2, and the other part is a conical cutting edge 62 formed by the sliding part 61 extending toward one side of the joint body 1. The thickness of the conical cutting edge 62 gradually decreases, and the conical cutting edge 62 can be deformed and inserted into the limiting groove 4 on the joint body 1, and fit tightly with the limiting groove 4 to form a sealing structure.

[0046] The specific material of the ferrule 6 can be stainless steel, and other metal materials can also be selected according to needs.

[0047] Example 2

[0048] like Figure 2 and Figure 4 As shown, the difference between this embodiment and embodiment 1 is that:

[0049] The anti-loosening nut 5 is a double nut structure;

[0050] The anti-loosening nut 5 comprises a fastening nut 53 and a locking nut 54, one end of the fastening nut 53 protrudes outwardly along the axial direction to form a fixing section 55, the inner diameter of the fixing section 55 is the same as the inner diameter of the fastening nut 53, and the inner walls of the fastening nut 53 and the fixing section 55 are provided with a continuous third thread section that matches the first thread section, and the outer diameter of the fixing section 55 is provided with a fourth thread section, one end of the locking nut 54 is recessed inward to form a locking section 56, the outer diameter of the locking section 56 is the same as the outer diameter of the locking nut 54, the inner diameter of the locking section 56 is smaller than the inner diameter of the locking nut 54 and the same as the outer diameter of the fixing section 55, the inner wall of the locking section 56 is provided with a fifth thread section that matches the third thread section, and the inner wall of the locking nut 54 is provided with a sixth thread section that matches the first thread section;

[0051] The fastening nut 53 and the locking nut 54 are threadedly connected through the fourth thread segment and the fifth thread segment, the fastening nut 53 is threadedly connected to the first thread segment on the joint body 1 through the third thread segment, and the locking nut 54 is threadedly connected to the first thread segment on the joint body 1 through the sixth thread segment.

[0052] In this embodiment, the anti-loosening nut 5 is set as a double-nut locking structure, the fastening nut 53 and the locking nut 54 are threadedly connected, and the fastening nut 53 and the locking nut 54 are simultaneously threadedly connected to the joint body 1;

[0053] Specifically, the fastening nut 53 is composed of two parts, one part is the fastening nut 53 body (internal thread structure), and the other part is the fixing section 55 (which can be integrally formed) extending toward one side of the fastening nut 53. The fixing section 55 is provided with thread structures on both the inner and outer sides. The thread structure of the inner wall of the fixing section 55 and the internal thread structure of the fastening nut 53 form a continuous third thread section. The external thread structure on the outer side of the fixing section 55 is the fourth thread section. The outer diameter of the fixing section 55 is smaller than the outer diameter of the fastening nut 53. The locking nut 54 is also composed of two parts, one part is the locking nut 54 body (internal thread structure), and the other part is the locking section 56 (integrally formed) extending from the locking nut 54 body to one side. The locking section 56 is also an internal thread structure, and the inner diameter of the locking section 56 is larger than the inner diameter of the locking nut 54. The inner diameter of the locking section 56 is matched with the outer diameter of the fixing section 55. The thread structure of the inner wall of the locking section 56 is the fifth thread section, and the thread structure of the locking nut 54 is the sixth thread section.

[0054] The above-mentioned fastening nut 53 is connected to the first thread segment on the joint body 1 through the third thread segment, the locking nut 54 is connected to the fourth thread segment of the fastening nut 53 through the fifth thread segment, and the locking nut 54 is connected to the first thread segment on the joint body 1 through the sixth thread segment;

[0055] The above-mentioned fastening nut 53 has a through hole adapted to the welding transition joint 2 on its main body, which can be sleeved on the welding transition joint 2. The inner diameter of the threaded section on the fastening nut 53 is slightly larger than the inner diameter of the welding transition joint 2, forming a gap between the two for installing the ferrule 6.

[0056] During installation, the fastening nut 53 and the locking nut 54 need to be rotated synchronously first, the conical cutting edge 62 at the front end of the ferrule 6 is pushed into the limiting groove 4 of the joint body 1, and then the locking nut 54 is rotated to lock;

[0057] The locking principle between the above-mentioned fastening nut 53 and the locking nut 54 is as follows: two friction surfaces are generated between the fastening nut 53, the locking nut 54 and the joint body 1, the first friction surface is between the anti-loosening nut group and the fastened piece (joint body 1), and the second friction surface is between the fastening nut 53 and the locking nut 54. During installation, the preload force of the first friction surface is 80% of that of the second friction surface. When subjected to impact and vibration loads, the friction force of the first friction surface will decrease and disappear, but at the same time, the first nut will be compressed, causing the friction force of the second friction surface to further increase. The first friction force and the second friction force must be overcome for the nut to loosen, because the second friction force will increase while the first friction force decreases.

[0058] Furthermore, an arrow mark representing the direction in which the nut is screwed in is provided on the outer side of the fastening nut 53 and / or the outer side of the locking nut 54. The arrow mark can be provided by spray painting, engraving, etc.

[0059] By providing arrow marks on the outer sides of the locking nut 54 and / or the fastening nut 53 , it is convenient for construction workers to perform construction.

[0060] The fastening nut 53 and the locking nut 54 are both provided with alignment marks, and the positions corresponding to the two alignment marks are the locking positions of the nuts.

[0061] By setting an alignment mark (not shown in the figure) on the fastening nut 53 and the locking nut 54, it is convenient for construction personnel to determine whether the two nuts are aligned; the matching mark can be a graphic mark or a symbol engraved on the two nuts.

[0062] The fastening nut 53 and the locking nut 54 are provided with matching marks for matching.

[0063] A pairing mark is set on the fastening nut 53 and the locking nut 54 to facilitate pairing of the fastening nut 53 and the locking nut 54, to ensure that each fastening nut 53 corresponds to only one dedicated locking nut 54, to prevent mixing after disassembly;

[0064] The pairing mark can be the same symbol or character mark set on each set of fastening nuts 53 and locking nuts 54, and two with the same symbol are grouped together to facilitate pairing.

[0065] The above specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0066] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0067] The present invention is described in more detail through general description and specific embodiments. It should be noted that, without departing from the concept of the present invention, it is obvious that several variations and improvements can be made to these specific embodiments, which all belong to the protection scope of this application. Therefore, the protection scope of the patent of this application shall be subject to the attached claims.

Claims

1. A metal ferrule sealing joint assembly, characterized in that: It includes a joint body and a welding transition joint, the welding transition joint is connected to one end of the joint body, an annular groove is provided on the inner side wall of the end of the joint body, the diameter of the annular groove is adapted to the outer diameter of the welding transition joint, and the welding transition joint is inserted into the annular groove, and an outward-expanding trumpet-shaped limiting groove is provided at the notch of the annular groove; a locking nut is sleeved on the welding transition joint, the locking nut is slidingly connected to the welding transition joint, a first threaded section in the shape of an external thread is provided on the outer side of the joint body, the locking nut is threadedly connected to the joint body, a ferrule is provided between the inner wall of the locking nut and the outer wall of the welding transition joint, and a conical cutting edge is provided on the ferrule near one end of the joint body.

2. The anti-loosening metal ferrule type sealing joint assembly according to claim 1, characterized in that: The width of the annular groove is adapted to the wall thickness of the welding transition joint.

3. The anti-loosening metal ferrule type sealing joint assembly according to claim 2, characterized in that: The anti-loosening nut is a single nut structure; The anti-loosening nut includes an annular first connecting portion, which is sleeved on the welding transition joint. The outer side of the first connecting portion extends toward one side of the joint body to form an annular second connecting portion, and the inner diameter of the second connecting portion is larger than the inner diameter of the welding transition joint. The inner diameter of the second connecting portion is adapted to the outer diameter of the joint body. A second threaded section is provided on the inner side wall of the second connecting portion. The anti-loosening nut is threadedly connected to the first threaded section on the joint body through the second threaded section. When the joint body is rotated, the first connecting portion slides on the welding transition joint and drives the ferrule to move toward one side of the joint body.

4. The anti-loosening metal ferrule type sealing joint assembly according to claim 2, characterized in that: The anti-loosening nut is a double nut structure; The anti-loosening nut comprises a fastening nut and a locking nut, one end of the fastening nut protrudes outwardly along the axial direction to form a fixing section, the inner diameter of the fixing section is the same as the inner diameter of the fastening nut, and the inner walls of the fastening nut and the fixing section are provided with a continuous third thread section that matches the first thread section, the outer diameter of the fixing section is provided with a fourth thread section, one end of the locking nut is recessed inward to form a locking section, the outer diameter of the locking section is the same as the outer diameter of the locking nut, the inner diameter of the locking section is smaller than the inner diameter of the locking nut and the same as the outer diameter of the fixing section, the inner wall of the locking section is provided with a fifth thread section that matches the third thread section, and the inner wall of the locking nut is provided with a sixth thread section that matches the first thread section; The fastening nut is threadedly connected to the locking nut via the fourth thread segment and the fifth thread segment, the fastening nut is threadedly connected to the first thread segment on the joint body via the third thread segment, and the locking nut is threadedly connected to the first thread segment on the joint body via the sixth thread segment.

5. The anti-loosening metal ferrule sealing joint assembly according to claim 3 or 4, characterized in that: The ferrule includes an annular sliding portion, which is sleeved between the anti-loosening nut and the welding transition joint. The thickness of the sliding portion at one end close to the joint body gradually decreases to form a conical cutting edge structure, and the conical cutting edge structure is adapted to the shape of the limiting groove.

6. The anti-loosening metal ferrule type sealing joint assembly according to claim 4, characterized in that: The outer side of the fastening nut and / or the outer side of the locking nut are both provided with arrow marks representing the screw-in direction of the nut.

7. The anti-loosening metal ferrule sealing joint assembly according to claim 5, characterized in that: The ferrule is made of stainless steel.

8. The anti-loosening metal ferrule type sealing joint assembly according to claim 6, characterized in that: The fastening nut and the locking nut are both provided with alignment marks, and the positions corresponding to the two alignment marks are the locking positions of the nuts.

9. The anti-loosening metal ferrule type sealing joint assembly according to claim 8, characterized in that: The fastening nut and the locking nut are provided with matching marks for matching.

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