A type of direct-plug quick connector
By employing a first ferrule, a second ferrule, and a locking block in the straight-insertion quick-connect fitting, the problem of difficult sealing ring assembly is solved, achieving quick connection and double sealing, adapting to pipe diameter deviations, and resulting in a tighter and more secure connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI E- CO PRECISION MFG CO LTD
- Filing Date
- 2025-09-28
- Publication Date
- 2026-07-17
AI Technical Summary
The existing straight-in quick connectors are difficult to assemble because the sealing ring is located at a relatively deep position.
The design employs a first ferrule, a second ferrule, and a ferrule block. The wedge-shaped head of the ferrule fits tightly against the inclined surface of the ferrule block to achieve axial locking. A double seal is formed through the cooperation of the built-in ferrule, ferrule spring, pipe, and sealing ring.
It enables rapid connection between pipes and devices, prevents separation, forms a double seal, adapts to pipe diameter deviations, and makes the connection tighter and more secure.
Smart Images
Figure CN224516251U_ABST
Abstract
Description
Technical Field
[0001] This application relates to a quick-installation straight-in connector, specifically a straight-in quick-connect connector. Background Technology
[0002] Direct-insertion quick couplings are widely used in industrial production. Airtightness and operational tests of products require sealing connections, and compared to common methods like nuts and clamps, they save time and improve testing efficiency. As the name suggests, a direct-insertion quick coupling is a sealing connector that can be directly inserted into the pipe opening to achieve a sealing connection. They are mainly divided into handle-driven, sliding-sleeve-driven, and pneumatic-driven types. The appropriate model should be selected based on the actual application scenario. The advantages of direct-insertion quick couplings are mainly: simple operation, good sealing performance, durability, minimal damage to workpieces, and applicability to various pipe types.
[0003] For existing connectors with longer lengths, the internal sealing rings are quite deep. Since the connector and the joint are integrated, the sealing ring needs to be installed inside the connector during assembly, which is a difficult assembly method. Utility Model Content
[0004] In view of the above-mentioned related technologies, the purpose of this application is to provide a direct-insertion quick-connect connector, which solves the problem that since the connector and the connector need to be set as one piece, the sealing ring located in a deep position needs to be installed inside the connector during the assembly process, which is a difficult assembly method.
[0005] This application provides a direct-insertion quick-connect connector with the following technical solution: it includes a connector structure, one side of which is provided with a quick connector structure, and a sealing ring structure is snapped together between the connector structure and the quick connector structure. The connector structure includes a main body, a first ferrule, multiple second ferrules, an internal groove, and a retaining spring. The quick connector structure includes an extension tube, a threaded ring, a insert, an assembly piece, a pin, and a locking block. The sealing ring structure includes a retaining ring and a rubber sealing ring. By adopting the above technical solution, through the setting of the first ferrule, the second ferrule, and the locking block, when the locking block moves to the annular groove between the first ferrule and the second ferrule during use, the locking block utilizes the properties of rubber to make its wedge-shaped head fit tightly against the inclined surface of the groove, thereby achieving axial locking and effectively preventing the separation of the main body from the cylinder. This achieves the purpose of making the connection between the pipeline and the device faster, and the insertion distance between the connector and the joint is shorter, thus making the fixation tighter.
[0006] Preferably, a main body is fixedly connected to the middle of the connector structure, a plurality of first sleeves are fixedly connected inside the main body, and a plurality of second sleeves are fixedly connected to the side of the main body away from the inside of the first sleeves.
[0007] By adopting the above technical solution, when the card block moves to the annular groove between the first card sleeve and the second card sleeve, the telescopic spring releases its elastic force, pushing the card block to pop out radially, and its wedge-shaped head fits tightly with the inclined surface of the groove.
[0008] Preferably, a plurality of first card sleeves and a plurality of second card sleeves are joined together to form an inner groove, and the main body has an internal card slot on the side away from the first and second card sleeves, and a retaining spring is engaged inside the internal card slot.
[0009] By adopting the above technical solution, axial locking is achieved, effectively preventing the separation of the main body and the cylinder.
[0010] Preferably, a cylindrical column is fixedly connected to the middle of the quick connector structure, an extension tube is fixedly connected to one side of the cylindrical column, and a threaded ring is fixedly connected to the outside of the extension tube.
[0011] By adopting the above technical solution, the thread characteristics are utilized to combine it with other screw structures, making it more convenient to connect pipes externally.
[0012] Preferably, a plug is fixedly connected to the side of the cylindrical column away from the extension tube, and an assembly piece is fixedly connected to one side of the plug.
[0013] Preferably, one side of the assembly piece is fixedly connected with a plurality of pins arranged in a ring array, and the plurality of pins are adapted to a plurality of slots opened on one side of the main body. The outside of the insert has a locking block, and the locking block is made of plastic.
[0014] By adopting the above technical solution, the connection between the pipeline and the device is faster, and the insertion distance between the connector and the joint is shorter, thus making the fixation tighter.
[0015] Preferably, a retaining ring is fixedly connected to the middle of the sealing ring structure, and rubber sealing rings are fixedly connected to both sides of the retaining ring.
[0016] By adopting the above technical solution, after the main body and the cylinder are spliced, the fixing ring is axially compressed, and the rubber sealing ring is squeezed and tightly filled in the joint gap between the main body and the cylinder, forming a double seal.
[0017] Preferably, the main body has a pipe in the middle, the pipe is snapped into the middle of the retaining spring, one end of the pipe is in contact with one end of the extension pipe and a water-proof pad is provided between the two.
[0018] By adopting the above technical solution, and through the precise matching of mechanical structures and the synergistic effect of elastic elements, rapid positioning, firm connection and reliable sealing of pipelines are achieved.
[0019] In summary, this application includes at least one of the following beneficial technical effects: This type of direct-insertion quick-connect fitting, through the arrangement of a first ferrule, a second ferrule, and a locking block, allows the locking block to move into the annular groove between the first and second ferrules during use. Utilizing the properties of plastic, the wedge-shaped head of the locking block fits tightly against the inclined surface of the groove, achieving axial locking and effectively preventing separation of the main body from the cylinder. This results in a faster connection between the pipe and the device, and a shorter insertion distance between the connector and the fitting, thus ensuring a tighter fixation.
[0020] This type of direct-insertion quick-connect coupling, through the built-in slot, retaining ring, pipe, and fixed retaining ring and rubber sealing ring, allows the connected pipe to be pushed into the middle of the retaining ring along the axis of the main body during use. The inner side of the retaining ring is designed with circumferentially distributed wedge-shaped protrusions. When the pipe passes through, the protrusions are squeezed by the outer wall of the pipe, causing radial contraction. The elastic force tightly clamps the outer wall of the pipe. When the main body and the cylinder are spliced, the fixed retaining ring is axially compressed, and the rubber sealing ring is squeezed and tightly fills the gap between the main body and the cylinder, forming a double seal. This achieves the purpose of tightly clamping the outer wall of the pipe with elastic force, which can not only prevent the pipe from moving axially, but also accommodate the deviation of the pipe diameter, and has strong firmness. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the applicant. Figure 2 This is a cross-sectional plan view of the main body of this application; Figure 3 This is a schematic cross-sectional view of the joint structure in this application; Figure 4 This is a cross-sectional view of the quick connector structure of this application; Figure 5 This is a cross-sectional view of the sealing ring structure of this application.
[0022] In the picture: 001. Connector structure; 002. Quick connector structure; 003. Sealing ring structure; 1. Main body; 2. First ferrule; 3. Second ferrule; 4. Internal slot; 5. Snap ring; 6. Cylindrical column; 7. Extension tube; 8. Threaded ring; 9. Insert; 10. Assembly piece; 11. Pin; 13. Locking block; 17. Retaining ring; 19. Rubber sealing ring; 20. Pipe. Detailed Implementation
[0023] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below.
[0024] Example 1: A straight-insertion quick-connect connector, referring to... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The connector includes a connector structure 001, a quick connector structure 002 on one side of the connector structure 001, and a sealing ring structure 003 that is snapped together between the connector structure 001 and the quick connector structure 002. The connector structure 001 includes a main body 1, a first ferrule 2, multiple second ferrules 3, an internal groove 4, and a retaining spring 5. The quick connector structure 002 includes an extension tube 7, a threaded ring 8, a insert 9, an assembly piece 10, a pin 11, and a locking block 13. The sealing ring structure 003 includes a retaining ring 17 and a rubber sealing ring 19. The main body 1 is fixedly connected to the middle of the connector structure 001. Multiple first ferrules 2 are fixedly connected inside the main body 1. Multiple second ferrules 3 are fixedly connected to the side of the main body 1 away from the inside of the first ferrules 2. The first sleeve 2 and multiple second sleeves 3 are joined together to form an inner groove. The main body 1, on the side away from the first sleeve 2 and second sleeves 3, has an internal slot 4. A retaining spring 5 is engaged inside the internal slot 4. A cylindrical column 6 is fixedly connected to the middle of the quick connector structure 002. An extension tube 7 is fixedly connected to one side of the cylindrical column 6. A threaded ring 8 is fixedly connected to the outside of the extension tube 7. A plug 9 is fixedly connected to the side of the cylindrical column 6 away from the extension tube 7. An assembly piece 10 is fixedly connected to one side of the plug 9. Multiple pins 11 arranged in a ring array are fixedly connected to one side of the assembly piece 10. The multiple pins 11 are adapted to multiple slots on one side of the main body 1. A locking block 13, made of plastic, is fixedly connected to the outside of the plug 9. A sealing ring structure 003 is fixedly connected to the middle of the plug 9. A fixed retaining ring 17 is fixedly connected to two sides with rubber sealing rings 19. A pipe 20 is located in the middle of the main body 1. The pipe 20 is snapped into the middle of the retaining spring 5. One end of the pipe 20 contacts one end of the extension pipe 7, and a water-proof pad is provided between them. Through the arrangement of the first retaining sleeve 2, the second retaining sleeve 3, and the locking block 13, during use, when the locking block 13 moves to the annular groove between the first retaining sleeve 2 and the second retaining sleeve 3, the locking block 13 utilizes the properties of plastic to ensure its wedge-shaped head fits tightly against the inclined surface of the groove, achieving axial locking and effectively preventing the main body 1 from separating from the cylinder 6. This achieves a faster connection between the pipe 20 and the device, and a shorter insertion distance between the connector and the joint, thus making the fixation tighter. This is achieved through the built-in locking... The groove 4, snap ring 5, pipe 20, and the fixed retaining ring 17 and rubber sealing ring 19 are designed so that the connected pipe 20 can be pushed into the middle of the snap ring 5 along the axis of the main body 1 during use. The snap ring 5 has circumferentially distributed wedge-shaped protrusions on its inner side. When the pipe 20 passes through, the protrusions are squeezed by the outer wall of the pipe 20 and generate radial contraction. The elastic force is used to tightly clamp the outer wall of the pipe 20. When the main body 1 is spliced with the cylinder 6, the fixed retaining ring 17 is axially pressed, and the rubber sealing ring 19 is squeezed and tightly filled in the joint gap between the main body 1 and the cylinder 6, forming a double seal. This achieves the purpose of using elastic force to tightly clamp the outer wall of the pipe 20, which can not only prevent the pipe 20 from moving axially, but also accommodate the deviation of the pipe 20 diameter, and has strong firmness.
[0025] The implementation principle of this application embodiment is as follows: During the installation and construction of the pipeline 20 system, when it is necessary to splice the main body 1 and the cylinder 6 and fix the pipeline 20, the following steps should be followed to ensure a firm connection and reliable sealing. First, the worker needs to embed the snap ring 5 into the pre-set built-in slot 4 inside the main body 1. The size of the snap ring 5 is adapted to the annular groove of the built-in slot 4 to ensure that it is not easy to fall off after installation. When embedding, it should be noted that the opening of the snap ring 5 is aligned with the insertion direction of the pipeline 20 to reserve space for subsequent fixing of the pipeline 20. Then, the pipeline 20 to be connected is pushed into the middle of the snap ring 5 along the axial direction of the main body 1. The snap ring 5 has circumferentially distributed wedge-shaped protrusions on its inner side. When the pipeline 20 passes through, the protrusions are squeezed by the outer wall of the pipeline 20 to generate radial contraction. The elastic force tightly clamps the outer wall of the pipeline 20, which can prevent the axial movement of the pipeline 20 and adapt to the small deviation of the diameter of the pipeline 20, thus achieving preliminary positioning and fixing. Next, the main body 1 and the cylinder 6 are assembled: The worker holds the cylinder 6 and inserts the insert 9 at its end, aligning it with the interface end of the main body 1. The outer wall of the insert 9 must be aligned with the inner wall of the main body 1 during insertion. Simultaneously, multiple pins 11, evenly distributed circumferentially on the assembly piece 10 fixed to the end of the cylinder 6, are inserted into the corresponding positioning holes in the main body 1, forming radial limits to prevent relative rotation after assembly. After the insert 9 is inserted, the locking block 13 inside the cylinder 6 forms a mechanical lock with the first retaining sleeve 2 and the second retaining sleeve 3 inside the main body 1. Its wedge-shaped head fits tightly against the inclined surface of the slot, achieving axial locking and effectively preventing separation of the main body 1 and the cylinder 6. Finally, check the sealing effect of the fixed retaining ring 17: The fixed retaining ring 17 is fitted on the cylinder 6 near the interface, and rubber sealing rings 19 are symmetrically distributed on both sides. When the main body 1 and the cylinder 6 are spliced, the fixed retaining ring 17 is axially compressed, and the rubber sealing rings 19 are squeezed and tightly filled in the joint gap between the main body 1 and the cylinder 6, forming a double seal. The splicing process achieves rapid positioning, firm connection and reliable sealing of the pipeline 20 through the precise matching of the mechanical structure and the synergistic effect of the elastic element.
Claims
1. A straight plug-in quick connector comprising a connector structure (001), characterized in that: The connector structure (001) has a quick connector structure (002) on one side. The connector structure (001) and the quick connector structure (002) are connected together by a sealing ring structure (003). The connector structure (001) includes a main body (1), a first sleeve (2), multiple second sleeves (3), an internal slot (4), and a retaining ring (5). The quick connector structure (002) includes an extension tube (7), a threaded ring (8), a plug (9), an assembly piece (10), a pin (11), and a locking block (13). The sealing ring structure (003) includes a fixed retaining ring (17) and a rubber sealing ring (19).
2. An in-line, quick disconnect coupling according to claim 1, wherein: The connector structure (001) is fixedly connected to the middle of the main body (1), and a plurality of first sleeves (2) are fixedly connected inside the main body (1). A plurality of second sleeves (3) are fixedly connected to the side of the main body (1) away from the inside of the first sleeves (2).
3. An in-line, quick disconnect coupling according to claim 2, wherein: Multiple first card sleeves (2) and multiple second card sleeves (3) are joined together to form an inner groove. The main body (1) has an internal card slot (4) on the side away from the first card sleeve (2) and the second card sleeve (3). A retaining spring (5) is engaged inside the internal card slot (4).
4. An in-line, quick disconnect coupling according to claim 1, wherein: The quick connector structure (002) has a cylindrical column (6) fixedly connected to the middle, an extension tube (7) fixedly connected to one side of the cylindrical column (6), and a threaded ring (8) fixedly connected to the outside of the extension tube (7).
5. An in-line, quick disconnect coupling according to claim 4, wherein: A tube (9) is fixedly connected to the side of the cylinder (6) away from the extension tube (7), and an assembly piece (10) is fixedly connected to one side of the tube (9).
6. An in-line, quick disconnect coupling according to claim 5, wherein: The assembly piece (10) has a plurality of pins (11) arranged in a ring array fixedly connected to one side. The plurality of pins (11) are adapted to the plurality of slots opened on one side of the main body (1). The insert (9) has a locking block (13) on its outside. The locking block (13) is made of plastic.
7. An in-line, quick disconnect coupling according to claim 1, wherein: A fixed retaining ring (17) is fixedly connected to the middle of the sealing ring structure (003), and rubber sealing rings (19) are fixedly connected to both sides of the fixed retaining ring (17).
8. An in-line, quick disconnect coupling according to claim 2, wherein: The main body (1) has a pipe (20) in the middle, which is snapped into the middle of the snap ring (5). One end of the pipe (20) is in contact with one end of the extension pipe (7) and a water-proof pad is provided between them.