Plug-in type structure

Abstract

The utility model discloses a plug-in type structure which comprises a first connector, a second connector and a limiting assembly, the second connector extends into the first connector, the limiting assembly comprises a plug pin, a plug hole and a plug-in groove, the plug-in groove is formed in the outer surface of the second connector, the plug hole is formed in the first connector, the plug hole and the plug-in groove are correspondingly arranged, and the plug pin is inserted into the plug-in groove. The plug pin penetrates through the inserting hole and is limited in the inserting groove, so that the first connector and the second connector are relatively fixed in the axial direction and the circumferential direction at the same time, the structure is simple, disassembly and assembly are rapid, and it can be ensured that relative rotation does not occur after assembly is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical connection, in particular to a plug-in structure that can be quickly connected and relatively fixed in the circumferential direction. Background Art

[0002] A pipeline is a device used to transport gases, liquids, or fluids containing solid particles. Multiple pipeline components, including but not limited to valves, pipes, and pipe connectors, can be connected within a pipeline. Within a pipeline, valves, pipes, connectors, and pipes often need to be connected. There are many different connection methods and structures for pipelines. Traditionally, threaded connections are mostly used. While this method offers high reliability, it often requires wrapping with raw tape during installation to ensure a tight seal, resulting in low installation efficiency.

[0003] In order to improve installation efficiency, the existing technology also proposes a pipe connection method using a plug-in structure. Although this structure has high installation efficiency, the existing structure can usually only perform axial limiting (such as a U-shaped pin), and there is a problem of relative rotation between the docked pipes. This causes the above-mentioned plug-in structure to be unable to be applied in some usage scenarios. For example, there is a valve in the pipeline (such as a horizontal check valve), which must maintain a certain orientation. If the existing plug-in structure is directly used, it will cause it to be unable to be used normally.

[0004] Although the above connection structure can achieve quick connection of pipeline components, it can only limit the radial and axial movement of the first joint and the second joint, and cannot limit the circumferential rotation between the first joint and the second joint, so it cannot achieve complete locking. Utility Model Content

[0005] The utility model provides a plug-in structure, which aims to overcome the above-mentioned problems existing in the prior art during the assembly process.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A plug-in structure includes a first connector, a second connector, and a retaining assembly. The second connector extends into the first connector, and the retaining assembly includes a pin, a socket, and a slot. The second connector has a slot formed on its outer surface, and the first connector has a socket formed on its outer surface. The socket and the slot are correspondingly arranged. The pin passes through the socket and is retained in the slot, so that the first connector and the second connector are relatively fixed in both the axial and circumferential directions.

[0008] In a preferred embodiment, the latch contacts the bottom surface of the insertion slot at at least two points in a radial cross-section of the plug-in structure. Therefore, when the second connector and the first connector tend to rotate circumferentially, the latch can abut against at least one contact point in the insertion slot to restrict circumferential rotation between the second connector and the first connector, thereby achieving circumferential fixation between the second connector and the first connector.

[0009] In the recommended embodiment, the plug-in structure has a radial cross section in which the plug-in pin makes linear contact with the bottom surface of the insertion slot, thereby increasing the stability of the fit and limit of the plug-in pin and the insertion slot and further improving the reliability of the circumferential fixation between the second connector and the first connector.

[0010] In a recommended embodiment, the insertion slot is perpendicular to the central axis of the second connector. This allows the pin to be inserted and retained in the insertion slot perpendicular to the central axis, preventing circumferential movement and enhancing the stability of the axial fixation between the first and second connectors. Furthermore, a insertion slot perpendicular to the central axis of the second connector facilitates machining, particularly when the second connector is made of metal. The second connector with an annular insertion slot can be directly manufactured by turning.

[0011] In a recommended embodiment, the insertion slot includes a retaining portion with a flat bottom surface, within which the latch pin is retained. The insertion slot can be partially or entirely formed with a retaining portion having a flat bottom surface. The bottom surface of the retaining portion can abut against the outer wall of the latch pin, limiting circumferential rotation of the first and second joints. Compared to retaining portions with other shapes, retaining portions with a flat bottom surface effectively restrict rotation of the first and second joints, while also offering a simpler structure and greater ease of turning.

[0012] In the recommended embodiment, the insertion slot includes a stopper and a main body. The main body is formed in an annular shape surrounding the surface of the second connector, and the stopper is cut into at least one side of the main body. The annular main body facilitates insertion of the plug, eliminating the need to specifically adjust the insertion position of the plug between the first and second connectors. The plug can be secured by simply rotating the stopper until it aligns with the pin during insertion.

[0013] In a preferred embodiment, the insertion slot has a plurality of stoppers, which are arranged around the surface of the second connector with their bottom surfaces sequentially contacting each other. Inserting the pin into any of the stoppers can quickly and conveniently secure the first connector to the second connector.

[0014] In the recommended embodiment, the insertion slot has four retaining portions. In a radial cross-section of the plug-in structure, the bottom surfaces of the four retaining portions are sequentially connected to form a rectangular shape. The latch can be inserted into any two opposing retaining portions to simultaneously secure the first and second connectors from opposite sides, providing a more reliable retaining structure.

[0015] In a recommended embodiment, the plug is a single plug that corresponds one-to-one with the socket.

[0016] In a preferred embodiment, the latch is a U-shaped latch.

[0017] Beneficial effects of the utility model:

[0018] According to the plug-in structure provided by the present invention, first, the second connector is inserted into the first connector, restricting radial movement of the first and second connectors. Furthermore, the latch is inserted through the socket and restrained within the insertion slot, so that the portion of the latch within the insertion slot is restrained by the insertion slot and fixed axially relative to the second connector. The portion of the latch in the socket is also fixed relative to the first connector, thus ensuring that the first and second connectors are relatively fixed axially. Finally, in the technical solution of the present invention, the latch and the insertion slot can also restrict the relative fixation of the first and second connectors in the circumferential direction, resulting in a simple structure, quick assembly and disassembly, and the ability to quickly lock the first and second connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a plug-in structure provided by the first embodiment of the present utility model.

[0020] Figure 2 This is an axial cross-sectional view of a plug-in structure provided by the first embodiment of the present utility model.

[0021] Figure 3 It is a radial cross-sectional schematic diagram of the first plug-in structure provided by the second embodiment of the present utility model.

[0022] Figure 4 It is a radial cross-sectional schematic diagram of the second plug-in structure provided by the second embodiment of the present utility model.

[0023] Figure 5 It is a radial cross-sectional schematic diagram of the second joint provided by the second embodiment of the present utility model.

[0024] Description of reference numerals:

[0025] 1-first connector; 2-second connector; 3-limiting assembly; 31-pin; 32-jack; 33-connecting slot; 331-limiting portion; 332-main body. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0027] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0030] First embodiment

[0031] Figure 1 It is a schematic diagram of the overall structure of a plug-in structure provided by the first embodiment of the present utility model. Figure 2 This is an axial cross-sectional view of a plug-in structure provided by the first embodiment of the present invention. Figure 1 and Figure 2 The plug-in structure includes a first connector 1, a second connector 2, and a stopper assembly 3. The second connector 2 extends into the first connector 1. The first connector 1 and the second connector 2 are hollow and plugged together, thereby forming a connected fluid passage. The stopper assembly 3 then limits the connection, so that the first connector 1 and the second connector 2 are relatively fixed in both the circumferential and axial directions.

[0032] Among them, the first joint 1 and the second joint 2 can be ports of any pipeline components (including but not limited to valves, pipes, pipe connectors, etc.). The accompanying drawings show an example of the case where the first joint 1 and the second joint 2 are both pipe joints, but the present invention is not limited to this. For example, the first joint 1 and the second joint 2 are both one end ports of a valve, pipe or pipe connector, or the first joint 1 and the second joint 2 are respectively one end ports of a valve, pipe or pipe connector, all of which fall within the scope of protection of the present invention.

[0033] The retaining assembly 3 includes a latch 31, a socket 32, and a slot 33. The slot 33 is formed on the outer surface of the second connector 2. The socket 32 is formed on the first connector 1, and the socket 32 is arranged corresponding to the slot 33. The latch 31 passes through the socket 32 and is retained within the slot 33. To install the first connector 1 and the second connector 2, simply insert the second connector 2 into the first connector 1 and then insert the latch 31 into the socket 32 to quickly lock the first connector 1 and the second connector 2.

[0034] Among them, the socket 32 is on the first connector 1. When the second connector 2 is inserted into the first connector 1 to the installation position, the socket 32 is just aligned with the insertion groove 33 in the axial direction, so that the pin 31 can be inserted into the insertion groove 33 after being inserted into the socket 32, thereby realizing the limitation of the first connector 1 and the second connector 2.

[0035] The shape and structure of the socket 32 are not limited here. In some embodiments, the socket 32 can be a through hole that passes through the first connector 1 along the tangent direction of the second connector 2, which is more convenient for processing, and the pin 31 can be inserted from any side to limit the first connector 1 and the second connector 2, which can provide reliability of the overall connection structure. In other embodiments, the first connector 1 can also include a boss that protrudes from the main body of the first connector 1, and the socket 32 is opened in the boss. In the recommended embodiment, the boss can be formed by extending along the tangent direction of the first connector 1, which is more convenient for turning. The opening of the boss helps to ensure the insertion direction of the pin 31, especially for effectively limiting the position of a single pin.

[0036] The shape of the latch 31 matches the socket 32, allowing it to be inserted into the socket 32 and retained. Generally speaking, depending on the usage scenario and the number and distribution of the sockets 32, the latch 31 can be a single latch or a U-shaped latch, etc., corresponding one-to-one with each socket 32. Furthermore, to facilitate the processing and acquisition of the latch 31, the end of the latch 31 that inserts into the socket 32 can be a straight rod. The above-mentioned simple substitution of the matching shapes of the latch 31 and the socket 32 also falls within the scope of protection of the present utility model.

[0037] The insertion groove 33 is provided on the outer surface of the second connector 2. The insertion groove 33 can be provided to fully or partially surround the second connector 2, or it can be provided only on one side of the outer surface of the second connector 2. The extension direction of the insertion groove 33 is not limited here. Preferably, the insertion groove 33 is perpendicular to the central axis of the second connector 2, so that the latch 31 can be inserted into the insertion groove 33 perpendicular to the central axis and restrained. The latch 31 will not have a tendency to move circumferentially, which can increase the stability of the axial fixation between the first connector 1 and the second connector 2. In addition, the insertion groove 33 perpendicular to the central axis of the second connector 2 is more convenient to manufacture. In particular, when the second connector 2 is made of metal, the second connector 2 with the annular insertion groove 33 can be directly manufactured by turning.

[0038] In particular, according to the plug-in structure provided by the present invention, the plug-in slot 33 can limit the position of the pin 31 in the axial and circumferential directions, thereby ensuring that the first connector 1 and the second connector 2 are relatively fixed in the axial, radial and circumferential directions. The mating method of the plug-in slot 33 and the pin 31 is not limited herein. In some embodiments, all or part of the bottom surface of the plug-in slot 33 can be a flat surface, which contacts the pin 31, thereby limiting the circumferential rotation of the second connector 2 relative to the pin 31. In other embodiments, the inner surface (bottom and / or side) of the plug-in slot 33 and the outer surface of the pin 31 are formed with a snap-fit structure. For example, when the inner surface of the plug-in slot 33 is formed with a snap-fitting groove and the outer surface of the pin 31 is formed with a protruding snap-fitting groove, when the pin 31 is inserted into the plug-in slot 33, the snap-fitting groove on the outer surface of the pin 31 can be engaged with the snap-fitting groove on the inner surface of the plug-in slot 33, thereby limiting the circumferential rotation of the second connector 2 relative to the pin 31. The above situation also applies to the technical solution of the present invention.

[0039] It should be noted that in the description of the embodiment of the present invention, the "bottom surface" of the insertion slot 33 refers to the inner surface of the insertion slot 33 facing the notch, and the "side surfaces" of the insertion slot 33 refer to the inner surfaces adjacent to both sides of the "bottom surface." The two "side surfaces" and one "bottom surface" of the insertion slot 33 together constitute the inner surface of the insertion slot 33.

[0040] In this embodiment, the second connector 2 is first inserted into the first connector 1, restricting radial movement of the first and second connectors 1 and 2. Furthermore, the latch 31 is inserted through the insertion hole 32 and restrained within the insertion slot 33. As a result, the portion of the latch 31 within the insertion slot 33 is restrained by the insertion slot 33 and fixed relative to the second connector 2 in the axial and circumferential directions. The portion of the latch 31 within the insertion hole 32 is also fixed relative to the first connector 1, thereby securing the first and second connectors 1 and 2 relative to each other in the axial and circumferential directions. This provides a simple structure, quick assembly and disassembly, and the ability to quickly lock the first and second connectors 1 and 2.

[0041] Second embodiment

[0042] Compared with the plug-in structure provided in the first embodiment, the plug-in structure provided in the second embodiment of the present invention more specifically describes the structure of a preferred limit assembly 3, and the other structures are the same as those in the first embodiment and are not described in detail here.

[0043] In a preferred embodiment, the plug-in structure has at least two points of contact between the pin 31 and the bottom surface of the insertion groove 33 in a radial cross-section. For example, the annular insertion groove 33 may be provided with at least one raised point on its bottom surface. After the pin 31 extends into the annular groove along the insertion hole 32, it contacts the bottom surface of the insertion groove 33 at two points. This allows the pin 31 to contact the pin 31 at these points when the second connector 2 rotates circumferentially, thereby inhibiting the second connector 2 from rotating circumferentially. Further preferably, on the radial cross-section of the plug-in structure, the pin 31 is in line contact with the bottom surface of the plug-in slot 33. On the basis of the effect of point contact, the bottom surface of the plug-in slot 33 is further arranged to correspond to the outer surface of the pin 31, so that after the pin 31 is extended, it can make line contact with at least part of the bottom surface of the plug-in slot 33, thereby increasing the contact area between the pin 31 and the bottom surface of the plug-in slot 33, and increasing the stability of the matching limit of the pin 31 and the plug-in slot 33, thereby further improving the reliability of the circumferential fixation between the second joint 2 and the first joint 1.

[0044] The structures of two specific limiting components 3 are further described below with reference to the accompanying drawings.

[0045] Figure 3 This is a radial cross-sectional view of the first plug-in structure provided by the second embodiment of the present invention. Figure 3 As shown, the end of a common commercially available pin 31 is generally in the shape of a straight rod. Therefore, in order to cooperate with the end of the straight rod-shaped pin 31, the plug-in slot 33 has a limiting portion 331, and the bottom surface of the limiting portion 331 is a plane. The pin 31 is limited within the limiting portion 331, so that when viewed from the radial cross-section of the plug-in structure, the outer side surface of the pin 31 is in line contact with the bottom surface of the limiting portion 331, so as to achieve relative fixation of the first connector 1 and the second connector 2 in the circumferential direction.

[0046] Furthermore, those skilled in the art can select the plane width and length of the limiting portion 331 according to their needs, and are not limited here. Generally speaking, the size and shape of the limiting portion 331 of the cut insertion slot 33 can be determined based on the size and specifications of the pin 31, so that the pin 31 and the limiting portion 331 can be more stably matched for limitation.

[0047] In this embodiment, compared with the limiting portion 331 of other shapes, the limiting portion 331 with a flat bottom surface can effectively limit the rotation of the first joint 1 and the second joint 2. At the same time, it has a simple structure and is more convenient for turning processing.

[0048] It should be noted that in this embodiment, the insertion slot 33 includes a limiting portion 331, which means that the insertion slot 33 can be partially or entirely formed as a limiting portion 331 with a flat bottom surface, and does not specifically mean that the limiting portion 331 can only be a portion of the insertion slot 33. For example, the entire bottom surface of the insertion slot 33 can be flat, in which case the entire insertion slot 33 is the limiting portion 331; alternatively, the insertion slot 33 can include the limiting portion 331 and other portions, all of which fall within the scope of protection of the present invention.

[0049] For example Figure 3 The figure shows the case where the entire bottom surface of the plug-in slot 33 is flat, that is, all the plug-in slots 33 are limit portions 331. In this case, only one side of the second connector 2 needs to be linearly cut to form the plug-in slot 33 with the limit portion 331, which is simple to process.

[0050] Figure 4 This is a radial cross-sectional view of the second plug-in structure provided by the second embodiment of the present invention. Figure 4 As shown, Figure 4 FIG3 shows a case where a portion of the plug-in slot 33 is formed as a limiting portion 331, that is, the plug-in slot 33 may include a limiting portion 331 and other portions (main portion 332). The main portion 332 may be any other shape, which is not limited here. Preferably, the main portion 332 is formed in a ring shape around the surface of the second connector 2, and the limiting portion 331 is formed by cutting at least one side of the main portion 332.

[0051] In this embodiment, the pin 31 can be extended from the insertion hole 32 into the annular insertion groove 33 in any direction. There is no need to specially adjust the insertion position of the pin 31 of the first connector 1 and the second connector 2. The first connector 1 and the second connector 2 only need to be relatively fixed in the circumferential direction by rotating the pin 31 to the position where the limit portion 331 matches the pin 31 during the insertion process.

[0052] Figure 5 : is a radial cross-sectional schematic diagram of the second joint provided by the second embodiment of the present invention. Figure 5 As shown, the plug-in slot 33 has a plurality of limiting portions 331, and the plurality of limiting portions 331 are arranged around the surface of the second connector 2 in a manner that the bottom surfaces are sequentially connected. Since the bottom surfaces of the limiting portions 331 are flat, the plurality of limiting portions 331 are connected end to end to form a polygon when viewed in a radial cross-section of the plug-in structure. Therefore, the relative fixation of the first connector 1 and the second connector 2 can be completed quickly and conveniently by inserting the pin 31 into any limiting portion 331.

[0053] It should be noted that the number of limiting portions 331 is not limited here. In order to ensure reliable fit between the latch 31 and the limiting portions 331, the number of limiting portions 331 can be selected according to the length requirements of each limiting portion 331. For example, when it is necessary to increase the fitting length between the latch 31 and the limiting portion 331, the number of limiting portions 331 can be appropriately reduced to ensure the length of each limiting portion 331.

[0054] in, Figure 5 An example of a preferred number of limit portions 331 is shown in FIG. Figure 5 As shown, the plug-in slot 33 has four limiting portions 331, and on the radial cross-section of the plug-in structure, the bottom surfaces of the four limiting portions 331 are connected in sequence to form a rectangle with two parallel opposite straight sides, so that the pin 31 can be inserted into any two opposite limiting portions 331 to simultaneously fix the first connector 1 and the second connector 2 from opposite sides. The limiting and fixing structure is more reliable. In particular, it is easier to insert the two ends of the U-shaped pin into the opposite set of limiting portions 331 at will, and disassembly and assembly are quick.

[0055] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A plug-in structure, characterized in that: The invention comprises a first joint (1), a second joint (2) and a limiting assembly (3), wherein the second joint (2) extends into the first joint (1), and the limiting assembly (3) comprises a latch (31), a socket (32) and a plug slot (33), an outer surface of the second joint (2) is formed with a plug slot (33), a socket (32) is formed on the first joint (1), the socket (32) and the plug slot (33) are arranged correspondingly, the latch (31) passes through the socket (32) and is limited in the plug slot (33), so that the first joint (1) and the second joint (2) are relatively fixed in both the axial and circumferential directions.

2. The plug-in structure according to claim 1, characterized in that: On the radial cross section of the plug-in structure, the plug pin (31) contacts the bottom surface of the plug-in slot (33) at least at two points.

3. The plug-in structure according to claim 2, characterized in that: On a radial cross section of the plug-in structure, the plug pin (31) is in line contact with the bottom surface of the plug-in slot (33).

4. The plug-in structure according to any one of claims 1 to 3, characterized in that: The insertion slot (33) is perpendicular to the central axis of the second joint (2).

5. The plug-in structure according to claim 4, characterized in that: The plug-in slot (33) comprises a limiting portion (331), the bottom surface of the limiting portion (331) is a plane, and the latch (31) is limited in the limiting portion (331).

6. The plug-in structure according to claim 4, characterized in that: The insertion slot (33) comprises a limiting portion (331) and a main body portion (332); the main body portion (332) is formed in an annular shape around the surface of the second joint (2); and the limiting portion (331) is formed by cutting at least one side of the main body portion (332).

7. The plug-in structure according to claim 5, characterized in that: The plug-in slot (33) has a plurality of limiting portions (331), and the plurality of limiting portions (331) are arranged around the surface of the second connector (2) in a manner in which the bottom surfaces are sequentially connected to each other.

8. The plug-in structure according to claim 7, characterized in that: The plug-in slot (33) has four limiting portions (331), and on the radial cross-section of the plug-in structure, the bottom surfaces of the four limiting portions (331) are connected in sequence to form a rectangle.

9. The plug-in structure according to claim 1, characterized in that: The latch (31) is a single latch corresponding one-to-one with the socket (32).

10. The plug-in structure according to claim 1, characterized in that: The latch (31) is a U-shaped latch.

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