Anti-loosening double-nut pressing type quick coupler

Abstract

The utility model discloses an anti-loosening double-nut pressing type quick coupler, and relates to the technical field of sealing couplings. Comprising a connector body, and a continuous fifth threaded section is arranged on the outer wall of the connector body; the locknut set comprises a fastening nut and a locking nut, a fixed section is formed at one end of the fastening nut, a continuous first threaded section matched with the fifth threaded section is arranged on the inner wall of the fastening nut and the inner wall of the fixed section, a second threaded section is arranged on the outer diameter of the fixed section, a locking section is formed at one end of the locking nut, and the locking section is matched with the second threaded section. A third threaded section matched with the second threaded section is arranged on the inner wall of the locking section, and a fourth threaded section matched with the fifth threaded section is arranged on the inner wall of the locking nut; the fastening nut and the locking nut are in threaded connection through the second threaded section and the third threaded section, and the locking nut is in threaded connection with the fifth threaded section on the connector body through the fourth threaded section. The fastening nut and the locking nut are fixed in a detachable connection mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealing joint technical field, concretely relates to a prevent loosening double nut compression type quick coupler. BACKGROUND

[0002] The quick coupler adopts the single nut thread fastening method and the sealing mode of the rubber material sealing ring in the present stage in the fixed technology field, and the mode and the method can only play a simple fixed connection role. UTILITY MODEL CONTENTS

[0003] Therefore, the utility model embodiment provides a prevent loosening double nut compression type quick coupler to solve the above technical problems.

[0004] In order to realize the above object, the utility model embodiment provides the following technical scheme:

[0005] First, a prevent loosening double nut compression type quick coupler, comprising:

[0006] The joint body, the continuous fifth thread section is formed on the outer wall of the joint body;

[0007] The prevent loosening nut group, the prevent loosening nut group includes fastening nut and locking nut, one end of the fastening nut is formed along the axial direction and protrudes outward and forms the fixed section, the inner diameter of the fixed section is same with the inner diameter of the fastening nut, and the fastening nut and the inner wall of the fixed section are provided with the continuous first thread section and are matched with the fifth thread section, the outer diameter of the fixed section is provided with the second thread section, one end of the locking nut is recessed inward and forms the locking section, the outer diameter of the locking section is same with the outer diameter of the locking nut, the inner diameter of the locking section is less than the inner diameter of the locking nut and is same with the outer diameter of the fixed section, the inner wall of the locking section is provided with the third thread section matched with the second thread section, and the inner wall of the locking nut is provided with the fourth thread section matched with the fifth thread section;

[0008] The fastening nut is connected with the joint body through the first thread section and the fifth thread section, and the locking nut is connected with the joint body through the fourth thread section and the fifth thread section.

[0009] Optionally, the fastening nut and the joint body are provided with the reinforcing assembly for locking the joint body.

[0010] Optionally, the reinforcing assembly includes the sealing ring, the gasket and the split ring, the split ring, the gasket and the sealing ring are sequentially arranged on the joint body along the screwing direction of the prevent loosening nut group, and the split ring, the gasket and the sealing ring are fixed between the fastening nut and the joint body.

[0011] Optionally, the end wall of the fastening nut away from the fixed section is inwardly convex to form a clamping portion, the clamping portion is provided as a tapered structure gradually increasing in diameter towards the fixed section, the opening ring is provided as a tapered structure, and the maximum outer diameter of the opening ring is greater than the minimum outer diameter of the clamping portion, so that the opening ring, the gasket and the sealing ring are pressed and fixed on the joint body by the fastening nut.

[0012] Optionally, the fastening nut and the fixed section, and the locking nut and the locking section are made of stainless steel.

[0013] The fastening nut and the fixed section, and the locking nut and the locking section are integrally formed.

[0014] Optionally, the outer side of the fastening nut and / or the outer side of the locking nut is provided with an arrow mark representing the screwing direction of the nut.

[0015] Optionally, the fastening nut and the locking nut are both provided with alignment marks, and the corresponding positions of the two alignment marks are the locking positions of the nuts.

[0016] Optionally, the fastening nut and the locking nut are provided with matching marks for matching.

[0017] The present application has at least the following advantages:

[0018] The present application has at least the following advantages: BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the prior art and the present application, the following will briefly introduce the drawings needed in the description of the prior art and the embodiments of the present application. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0020] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the utility model. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the functions and purposes of the utility model, should still fall within the scope of the disclosed technology.

[0021] Figure 1 The first perspective structural schematic view of an embodiment of the utility model;

[0022] Figure 2 The second perspective structural schematic view of the lock nut set of an embodiment of the utility model;

[0023] Figure 3 The third perspective structural schematic view of the lock nut set of an embodiment of the utility model;

[0024] Figure 4 The sectional view structural schematic view of an embodiment of the utility model;

[0025] Figure 5 The fourth perspective structural schematic view of an embodiment of the utility model;

[0026] Figure 6 The sectional view structural schematic view of an embodiment of the utility model; Figure 5 The sectional view structural schematic view of an embodiment of the utility model;

[0027] Explanation of reference signs:

[0028] 1, joint body; 2, lock nut set; 21, fastening nut; 22, fixed section; 23, locking nut; 24, locking section; 3, reinforcing assembly; 31, sealing ring; 32, gasket; 33, split ring; 4, clamping part; 5, arrow mark; 6, alignment mark. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the application more clear and understandable, the application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and not to limit the application.

[0030] In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more. The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the utility model and the above-mentioned drawings are intended to distinguish the objects referred to. For the scheme with time sequence flow, this kind of term expression method should not be understood as describing a specific order or sequence, and for the scheme of device structure, this kind of term expression method does not distinguish importance, position relationship, etc.

[0031] Furthermore, the terms "comprising", "having", "including", and "containing" are to be construed open-ended terms (i.e., meaning "decomprising, "having at least, "including at least") - that is, the terms "comprising", "having", "including", and "containing" are to be construed to mean one or more steps or units or features may be present in the process, method, system, article, or apparatus, but not excluding others.

[0032] Embodiment 1

[0033] As shown in the figure, the anti-loose double-nut compression type quick connector disclosed by the utility model comprises: Figures 1-6

[0034] A connector body 1, a continuous fifth threaded section is formed on the outer wall of the connector body 1;

[0035] An anti-loose nut set 2, the anti-loose nut set 2 comprises a fastening nut 21 and a locking nut 23, one end of the fastening nut 21 is outwardly protruded along the axial direction to form a fixed section 22, the inner diameter of the fixed section 22 is the same as that of the fastening nut, and the fastening nut and the inner wall of the fixed section 22 are provided with a continuous first threaded section which is matched with the fifth threaded section, the outer diameter of the fixed section 22 is provided with a second threaded section, one end of the locking nut 23 is inwardly recessed to form a locking section 24, the outer diameter of the locking section 24 is the same as that of the locking nut 23, the inner diameter of the locking section 24 is smaller than that of the locking nut 23 and is the same as the outer diameter of the fixed section 22, the inner wall of the locking section 24 is provided with a third threaded section which is matched with the second threaded section, and the inner wall of the locking nut 23 is provided with a fourth threaded section which is matched with the fifth threaded section;

[0036] The fastening nut and the locking nut 23 are threadedly connected through the second threaded section and the third threaded section, the fastening nut is threadedly connected with the fifth threaded section on the connector body 1 through the first threaded section, and the locking nut 23 is threadedly connected with the fifth threaded section on the connector body 1 through the fourth threaded section.

[0037] In the embodiment, the connector body 1 described above can be a straight pipe, a three-way pipe or the like pipeline;

[0038] The anti-loose nut set 2 is a double-nut structure, and is a sub-mother nut structure of the fastening nut 21 and the locking nut 23 respectively, the fastening nut 21 and the locking nut 23 are threadedly connected, and the fastening nut 21 and the locking nut 23 are simultaneously threadedly connected on the connector body 1;

[0039] ​Specifically, the fastening nut 21 is composed of two parts, one part is the main body of the fastening nut 21 (internal thread structure), and the other part is the fixed segment 22 (which can be integrally formed) extending towards one side of the fastening nut 21, the internal and external sides of the fixed segment 22 are provided with thread structures, the thread structure of the inner side wall of the fixed segment 22 forms a continuous first thread segment with the internal thread structure of the fastening nut 21, the external thread structure of the outer side of the fixed segment 22 is a second thread segment, and the outer diameter of the fixed segment 22 is smaller than the outer diameter of the fastening nut 21, forming a stepped structure; and the locking nut 23 is also composed of two parts, one part is the main body of the locking nut 23 (internal thread structure), and the other part is the locking segment 24 (integrally formed) extending towards one side of the locking nut 23, the locking segment 24 is also an internal thread structure, and the inner diameter of the locking segment 24 is larger than the inner diameter of the locking nut 23, the inner diameter of the locking segment 24 is matched with the outer diameter of the fixed segment 22, and the thread structure of the inner wall of the locking segment 24 is a third thread segment, and the thread structure of the fastening nut 21 is a fourth thread segment;

[0040] The fastening nut 21 described above is connected with the fifth thread segment on the joint body 1 through the first thread segment, the locking nut 23 is connected with the second thread segment of the fastening nut 21 through the third thread segment, and at the same time, the locking nut 23 is connected with the fifth thread segment on the joint body 1 through the fourth thread segment;

[0041] When installing, the fastening nut 21 and the locking nut 23 need to be rotated synchronously, therefore, the fastening nut 21 and the locking nut 23 need to be fixed by a detachable fixing mode, in the embodiment, the fastening nut 21 and the locking nut 23 are fixed by glue, which is convenient for separation; it should be noted that the fastening nut 21 and the locking nut 23 can also be fixed by other ways, and will not be separated during synchronous rotation, and are convenient for separation during locking.

[0042] The locking principle between the fastening nut 21 and the locking nut 23 is that two friction force surfaces are generated between the fastening nut 21, the locking nut 23 and the joint body 1, the first friction force surface is between the lock nut set 2 and the fastened part (the joint body 1), and the second friction force surface is between the fastening nut 21 and the locking nut 23. When installing, the pre-tightening force of the first friction force surface is 80% of the second friction force surface. When the impact and vibration load acts, the friction force of the first friction force surface will decrease and disappear, but at the same time, the first nut will be compressed to cause the friction force of the second friction force surface to further increase. The nut loosening must overcome the first friction and the second friction, and since the first friction decreases, the second friction will increase.

[0043] In further embodiments, a reinforcing assembly 3 is provided between the fastening nut and the joint body 1 for locking the joint body 1.

[0044] The reinforcing assembly 3 comprises a sealing ring 31, a gasket 32 and an open ring 33, which are sequentially arranged on the joint body 1 along the screwing direction of the lock nut set 2, and the open ring 33, the gasket 32 and the sealing ring 31 are fixed between the fastening nut and the joint body 1.

[0045] In a further embodiment, the sealing ring 31 can be made of non-metallic materials such as rubber, or made of metallic materials such as stainless steel.

[0046] Both the metallic and non-metallic sealing ring 31 can achieve sealing effect, and rubber is a conventional sealing ring material which will not be described here. The sealing ring 31 made of non-metallic materials is less affected by the ambient temperature, thereby ensuring the sealing effect, especially the stainless steel material after heat treatment, which has particularly good high and low temperature resistance.

[0047] The end wall of the fastening nut away from the fixed section 22 is inwardly convex to form a clamping portion 4, the clamping portion 4 is provided as a tapered structure with gradually increasing inner diameter of the fixed section 22, the open ring 33 is provided as a tapered structure, and the maximum outer diameter of the open ring 33 is greater than the minimum outer diameter of the clamping portion 4, and the open ring 33, the gasket 32 and the sealing ring 31 are pressed and fixed on the joint body 1 by the fastening nut.

[0048] The fastening nut, the fixed section 22, the lock nut 23 and the lock section 24 are all made of stainless steel.

[0049] The fastening nut, the fixed section 22, the lock nut 23 and the lock section 24 are all integrally formed.

[0050] In a further embodiment, the outer side of the fastening nut and / or the outer side of the lock nut 23 are provided with arrow marks 5 representing the screwing direction of the nut.

[0051] The fastening nut and the lock nut 23 are both provided with alignment marks 6, and the corresponding positions of the two alignment marks 6 are the locking positions of the nuts.

[0052] By providing arrow marks on the fastening nut 21 and / or the lock nut 23, it is convenient for the construction personnel to judge the screwing direction of the nut; according to different implementation scenarios, the rotating direction of the lock nut 23 during the locking process can be the same as or opposite to the screwing direction of the fastening nut 21, at this time, arrow marks are provided on the fastening nut 21 and the lock nut 23, the arrow mark 5 on the fastening nut 21 represents the direction of synchronous screwing, and the arrow mark 5 on the lock nut 23 represents the direction of rotation during locking of the lock nut 23.

[0053] In addition, alignment marks 6 can be arranged on the side walls of the fastening nut 21 and the locking nut 23 according to requirements, and the state of the locking of the nuts is set when the two alignment marks 6 are aligned.

[0054] The alignment marks 6 adopt a V-shaped structure, and other shapes or manners can also be adopted for marking.

[0055] In the embodiment, the arrow marks 5 and the alignment marks 6 can be arranged by spraying paint, engraving and the like.

[0056] In the embodiment, the pairing between the locking nut 23 and the fastening nut 21 can adopt two modes, one of which is a fixed pairing mode, and the corresponding fastening nut 21 and locking nut 23 are paired in a detachable connection mode. Specifically, the fastening nut 21 and the locking nut 23 can be fixed by using glue, so that the two nuts are always an integral whole, and one of them can be twisted to break the glue before installation; or other fixed pairing structures which are convenient to disassemble and do not affect installation can also be adopted.

[0057] The pairing in the embodiment can also be a marking pairing mode, that is, pairing marks (not shown in the figure) can also be arranged on the locking nut 23 and the fastening nut 21, and the same arrangement mode (spraying paint or engraving) can be adopted. The pairing marks can adopt symbols, numbers or letters and the like which are paired with each other, so as to pair the corresponding locking nut 23 and fastening nut 21. The pairing marks are set when the product is shipped, and each locking nut 23 is only adapted to the corresponding fastening nut 21, so as to facilitate pairing after disassembly.

[0058] The specific implementation method of the utility model is as follows:

[0059] The sealing ring 31, the gasket 32 and the open ring 33 are sequentially sleeved on the joint body 1, and the sealing ring 31, the gasket 32 and the open ring 33 are moved to the fifth threaded section;

[0060] Before installation, it is checked whether the nut appearance of the lock nut set 2 is intact, whether the arrow mark 5 and the alignment mark 6 are clear, and whether the fastening nut and the locking nut 23 are connected by the glue, so as to prevent disassembly.

[0061] The fastening nut and the locking nut 23 are kept in hexagonal alignment, the alignment mark 6 is aligned, one side of the lock nut set 2 is aligned with the joint body 1, and the lock nut set 2 is sleeved on the joint body 1 and moved to the fifth threaded section;

[0062] The torque wrench is used to fasten the lock nut set 2 as a whole, the fastening nut and the locking nut 23 are synchronously screwed into the fifth threaded section on the joint body 1, and the lock nut set 2 reaches the specified installation torque until the lock nut set 2 reaches the specified installation torque.

[0063] In the case of fixing the fastening nut, only rotate the lock nut 23 using the torque wrench until the lock nut 23 reaches the specified torque, and the installation is completed.

[0064] When the fastening nut 21 and the lock nut 23 are used, the fastening nut 21 and the lock nut 23 are separated by 2-3 mm in the state of being connected through the fixing section 22 and the locking section 24.

[0065] The specific installation method is that: the above anti-loose nut set 2, before installation, check whether the nut appearance is intact, whether the mark is clear, and whether the fastening nut 21 and the lock nut 23 are tightly connected (the threads are fixed with glue to prevent disassembly); in addition, there are V-shaped alignment marks on the corresponding surfaces of the fastening nut 21 and the lock nut 23;

[0066] The tools used are open wrenches and torque wrenches.

[0067] Before installation of the anti-loose nut set 2, the fastening nut 21 and the lock nut 23 should be kept in hexagonal alignment and V-shaped mark alignment.

[0068] And the main lock nut 23 is tightened by hand.

[0069] The torque wrench is used to tighten the anti-loose nut as a whole to confirm that the anti-loose nut reaches the specified installation torque.

[0070] In the case of fixing the fastening nut 21, the lock nut 23 is locked in the specified direction (the direction of the arrow mark 5 on the lock nut 23); the installation is completed.

[0071] When disassembling:

[0072] After the lock nut 23 is returned to the original position, the anti-loose nut (the fastening nut 21 and the lock nut 23) is rotated counterclockwise using the wrench until the anti-loose nut and the joint body 1 are separated by threads.

[0073] After the lock nut 23 is returned to the original position, the anti-loose nut (the fastening nut 21 and the lock nut 23) is rotated counterclockwise using the wrench until the anti-loose nut and the joint body 1 are separated by threads.

[0074] It should be noted that the fastening nut 21 and the lock nut 23 in the anti-loose nut must be used in pairs according to the factory state.

[0075] The above several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0076] Any combination of the technical features in the above embodiments can be made (as long as the combination of the technical features does not exist contradiction), in order to make the description simple, not all possible combinations of each technical feature in the above embodiments are described; these embodiments which are not explicitly written should also be considered as the scope of the description.

[0077] The utility model is described in detail above through general description and specific embodiments. It should be pointed out that, without departing from the concept of the utility model, obviously, a number of deformations and improvements can be made to these specific embodiments, and these all belong to the protection scope of the application. Therefore, the protection scope of the patent application should be subject to the appended claims.

Claims

1. A lock nut compression type quick coupling, characterized by comprising: The utility model relates to a kind of anti-loosening nut sets and joint body, including: Joint body, continuous fifth thread section is opened on the outer wall of the joint body; Anti-loosening nut set, the anti-loosening nut set includes fastening nut and locking nut, one end of the fastening nut is protruded along the axial direction and forms fixed section, the inner diameter of the fixed section is same with the inner diameter of fastening nut, and the inner wall of fastening nut and fixed section is provided with continuous and first thread section matched with fifth thread section, the outer diameter of the fixed section is provided with second thread section, one end of the locking nut is recessed and forms locking section, the outer diameter of the locking section is same with the outer diameter of locking nut, the inner diameter of the locking section is less than the inner diameter of locking nut and same with the outer diameter of fixed section, the inner wall of the locking section is provided with third thread section matched with second thread section, the inner wall of the locking nut is provided with fourth thread section matched with fifth thread section; The fastening nut is threadedly connected with the fifth thread section on the joint body through first thread section, and the locking nut is threadedly connected with the fifth thread section on the joint body through fourth thread section; The fastening nut and the locking nut are matched and arranged in a detachable connection manner.

2. A lock washer type fast coupling according to claim 1, wherein: The fastening nut and the joint body are provided with reinforcing assembly for locking joint body.

3. A lock washer type fast collar according to claim 2, characterized in that: The reinforcing assembly includes sealing ring, gasket and split ring, the split ring, gasket and sealing ring are fixed between the fastening nut and the joint body in sequence along the screwing direction of anti-loosening nut set.

4. A lock washer type fast collar according to claim 3, wherein: The end wall of the fastening nut away from the fixed section is protruded inward and forms clamping portion, the clamping portion is provided as taper structure gradually increasing from the fastening nut to the inner diameter of fixed section, the split ring is provided as taper structure, and the maximum outer diameter of the split ring is greater than the minimum outer diameter of the clamping portion, the split ring, gasket and sealing ring are pressed and fixed on the joint body by the fastening nut.

5. A lock washer type fast collar according to claim 1, wherein: The fastening nut and the fixed section, the locking nut and the locking section are stainless steel materials; The fastening nut and the fixed section, the locking nut and the locking section are integrally formed.

6. A lock washer type fast collar according to claim 1, wherein: The outside of the fastening nut and / or the outside of the locking nut is provided with arrow mark representing screwing direction.

7. A lock washer type fast collar according to claim 6, characterized in that: The fastening nut and the locking nut are both provided with alignment mark, and the corresponding positions of the two alignment marks are locking positions of the nut.

8. A lock washer type fast collar according to claim 6, wherein: The fastening nut and the locking nut are provided with pairing mark for pairing.

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