G-type thread tail end reducing self-sealing switching structure

Abstract

The utility model provides a G-type thread tail end reducing self-sealing adapter structure, which relates to the technical field of thread sealing, and comprises an adapter main body, one end of the adapter main body is provided with G-type external threads, the other end of the adapter main body is provided with an internal thread connecting part, the tail end of the adapter main body close to the G-type external threads is provided with a reducing section, the reducing section is provided with R-type external threads, and the R-type external threads are connected with the internal thread connecting part. A G-type internal thread is arranged on the internal thread connecting part of the adapter body, through matching of an R-type external thread and an Rc-type internal thread and a wedge-shaped hard sealing structure, a good sealing effect is achieved, an additional sealing gasket or sealant is not needed, the risk of sealing failure is reduced, and the adapter can be applied to occasions with the high requirement for sealing performance. Such as fluid conveying pipeline connection.

Description

TECHNICAL FIELD

[0001] The utility model relates to thread sealing technical field especially relates to a G type thread end variable diameter self sealing adapter structure. BACKGROUND

[0002] In the field of pipeline connection, mechanical component connection, threaded connection is a common connection method.

[0003] The existing G type thread (non-sealing pipe thread) usually does not have good sealing, in some occasions with higher requirements for sealing, need additional sealing measures, such as using sealing gasket, sealing glue etc., this not only increases the complexity and cost of assembly, there may be a risk of sealing failure, at the same time, the existing threaded connection structure when facing different specifications of connection demand, the commonality is poor.

[0004] Therefore, we propose a G type thread end variable diameter self sealing adapter structure. UTILITY MODEL CONTENTS

[0005] The utility model discloses a G type thread end variable diameter self sealing adapter structure, which can realize sealing connection with different specifications of connection demand, and the sealing performance is good.

[0006] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A G type thread end variable diameter self sealing adapter structure, comprising:

[0008] An adapter main body, one end of the adapter main body is provided with a G type external thread, and the other end is provided with an internal thread connecting part;

[0009] A variable diameter section is arranged at the end of the adapter main body close to the G type external thread, and an R type external thread is arranged on the variable diameter section;

[0010] The internal thread connecting part of the adapter main body is provided with a G type internal thread.

[0011] As a preferred scheme of the utility model, a groove is arranged on the inner side of the R type external thread, a shoulder is arranged on the internal thread part matched with the adapter main body, and the shoulder can be embedded in the groove to form a wedge-shaped hard sealing structure.

[0012] As a preferred scheme of the utility model, the G type external thread is used for connecting with a conventional G type internal thread part, and the R type external thread is used for cooperating with an Rc type internal thread part to realize sealing connection.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] Through the cooperation of R type external thread and Rc type internal thread and the wedge hard sealing structure, good sealing effect is realized, additional sealing gasket or sealing glue is not needed, the risk of sealing failure is reduced, and the utility model can be applied to occasions with high sealing requirements, such as fluid conveying pipeline connection.

[0015] The G type external thread of the structure one end can be connected with a large number of G type internal thread components, the existing equipment can be conveniently modified and upgraded, the adaptation between different specifications of components is realized, and the versatility of component connection is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 A main body structure schematic view of a G type thread end reducing self-sealing adapter structure is provided in the utility model.

[0017] Fig. 2 An internal structure schematic view of a G type thread end reducing self-sealing adapter structure is provided in the utility model.

[0018] Legend: 1, adapter main body; 2, G type external thread; 3, internal thread connecting part; 4, reducing section; 5, R type external thread; 6, G type internal thread; 7, R type external thread; 8, groove; 9, shoulder lifting. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] In order to facilitate understanding of the utility model, the utility model will be more fully described below in combination with the related utility model, and several embodiments of the utility model are given. However, the utility model can be realized in many different forms, and is not limited to the embodiments described in the text. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Example

[0024] like Figs. 1-2 As shown, this utility model provides a technical solution: the core component of this G-type thread end diameter changing self-sealing adapter structure is the adapter body 1. The adapter body 1 plays a bridging role in the whole structure, connecting different types of threaded components.

[0025] From the perspective of mechanical connection principles, the G-type external thread 2 set at one end of the adapter body 1 is based on the standard design of non-sealing pipe threads. The tooth profile angle of the G-type thread is usually 55°, and its thread profile is an isosceles triangle with rounded corners and corners. The main feature of this thread is that the thread itself does not have a sealing function, but it has good versatility and can be connected with a large number of existing conventional G-type internal thread 6 components. In practical applications, such as in water heating pipe systems, many pipe fittings use G-type threads. By screwing the G-type external thread 2 of the adapter body 1 into them, a preliminary mechanical connection can be quickly achieved. This connection method facilitates the assembly and disassembly of components, meets the connection needs between different equipment and pipe fittings, and lays the foundation for subsequent sealing connections.

[0026] The internal threaded connection part 3 provided at the other end of the adapter body 1 is for docking with other components. The design of the internal threaded connection part 3 allows the adapter body 1 to be connected with a variety of components with different structures in the connection system, further expanding its application range and enhancing the flexibility of the entire connection structure.

[0027] The variable diameter section 4, located at the end of the adapter body 1 near the G-type external thread 2, is one of the key parts for achieving the sealing function. The design of the variable diameter section 4 changes the local diameter of the adapter body 1. The R-type external thread 5 (conical external thread) machined on the variable diameter section 4 has a unique sealing principle.

[0028] The conical shape of the R-shaped external thread 5 makes the contact area between the internal and external threads gradually increase and the contact pressure constantly increase when the thread is gradually tightened when being screwed with the Rc-shaped internal thread (conical internal thread) on the mating component, and due to the tapering property of the conical thread, the thread profiles can be tightly fitted under the action of the axial force to form an effective sealing surface, thereby preventing fluid or gas leakage, which utilizes the geometric property of the conical thread itself to achieve good sealing effect without additional sealing elements (such as sealing gaskets, etc.), and is widely used in occasions with high sealing requirements, such as gas delivery pipelines, hydraulic system pipelines, etc.

[0029] Meanwhile, the G-shaped internal thread 6 provided in the internal thread connection part 3 of the adapter main body 1 is matched with the G-shaped external thread 2, and when connected with the corresponding component, this design not only increases the contact area of the connection, but also further enhances the stability of the connection by utilizing the mechanical engagement property of the G-shaped thread, and from the perspective of mechanics, this double-thread connection mode disperses the external force borne by the connection site, so that the connection structure can be more firm when subjected to axial tension, torque and other forces, and is not prone to loosening, thereby indirectly improving the sealing performance and ensuring the sealing performance and reliability of the connection site under various working conditions.

[0030] The recess 8 provided inside the R-shaped external thread 5 and the shoulder 9 provided on the internal thread component matched therewith are auxiliary sealing structures designed based on the wedge sealing principle.

[0031] When the R-shaped external thread 5 is assembled with the matched internal thread component, the shoulder 9 is embedded in the recess 8, and from a microscopic perspective, a large contact pressure will be generated on the contact surface as the two are embedded in each other, which compresses the gap between the shoulder 9 and the recess 8 to a very small size, preventing fluid or gas from leaking through the gap, and from the perspective of mechanics, the wedge-shaped structure has a self-locking property, and when subjected to external pressure, the friction between the shoulder 9 and the recess 8 will increase with the increase of the pressure, thereby further enhancing the sealing effect, and this wedge-shaped hard sealing structure serves as an auxiliary sealing means to compensate for the possible small gap leakage problem of the thread sealing, thereby further improving the sealing performance of the entire adapter structure, and is particularly suitable for special working conditions such as high pressure and high vacuum environments with extremely strict sealing requirements.

[0032] Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A self-sealing adapter structure for reducing the diameter at the end of a G-type thread, characterized in that... ,include: The adapter body (1) has a G-type external thread (2) at one end and an internal thread connection part (3) at the other end; A variable diameter section (4) is provided at the end of the adapter body (1) near the G-type external thread (2), and an R-type external thread (5) is provided on the variable diameter section (4); The internal thread connection part (3) of the adapter body (1) is provided with a G-type internal thread (6).

2. The self-sealing adapter structure for a G-type threaded end with a variable diameter as described in claim 1, characterized in that, A groove (8) is provided on the inner side of the R-type external thread (5), and a shoulder (9) is provided on the internal thread component that mates with the adapter body (1). The shoulder (9) can be embedded in the groove (8) to form a wedge-shaped hard seal structure.

3. The self-sealing adapter structure for a G-type threaded end with a variable diameter as described in claim 2, characterized in that: The G-type external thread (2) is used to connect with conventional G-type internal thread components, and the R-type external thread (5) is used to cooperate with Rc-type internal thread components to achieve a sealed connection.

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