A universal quick connector

Abstract

The present invention discloses a universal quick connector, comprising a bolt body, a connector hub, a hub sleeve, and a connector valve core. The rear end of the connector hub is threadedly connected to the front end of the bolt body. The hub sleeve is movably sleeved on the outside of the connector hub. The connector valve core is movably arranged in the connector hub. The front end inner wall of the connector valve core is provided with a first annular groove and a second annular groove in sequence from front to back. The first annular groove is embedded with a first sealing ring, and the second annular groove is embedded with a second sealing ring. The front end of the first annular groove is provided with a first annular step surface, and the rear end of the first annular groove is provided with a second annular step surface. The rear end of the first annular step surface extends to the side wall of the first annular groove, and the front end of the second annular step surface extends to the side wall of the first annular groove. The diameter of the first annular step surface is larger than the diameter of the second annular step surface, and the rear end of the second annular step surface is formed with an annular step. The present invention has a simple and reasonable structure and can be quickly connected to various types of plugs.

Description

Technical Field

[0001] The present invention relates to the technical field of quick connectors for pipe connections, in particular to a universal quick connector. Background Art

[0002] A quick connector is a type of connector that allows for quick connection of pipes. It contains multiple internal steel balls that snap together with an external insert, ensuring a quick connection while also ensuring an airtight connection. Common quick connectors on the market come in a wide variety of types and structures. For example, Chinese Patent Application No. 201521018068.9 discloses a pneumatic quick connector; Chinese Patent Application No. 201521014821.7 discloses an easy-to-assemble quick connector; and Chinese Patent Application No. 201521014896.5 discloses a quick connector.

[0003] At present, the above-mentioned existing quick connectors can usually only be adapted to one type of ferrule, but since the sizes of pipelines are not the same, the models, specifications, and sizes of the ferrules are also different. Taking the American standard as an example, there are 5 common American standard ferrules on the market, namely "No. 3 ferrule-INDUSTRIAL (MILTON) PLUG", "No. 5 ferrule-AUTOMOTIVETYPE", "No. 6 ferrule-ARO TYPE", "No. 17 ferrule-LINCOLNDESIGN PLUG" and "No. 19 ferrule-HIGH FLOW PLUG". The specifications and sizes of these 5 types of ferrules vary in size and thickness. When the quick connector and ferrule on different pipelines do not match during connection, the quick connector and / or ferrule need to be replaced to complete the connection operation, which makes the operation process more cumbersome and brings great inconvenience to daily production and life. Summary of the Invention

[0004] The purpose of the present invention is to address the defects and shortcomings of the existing technology and provide a universal quick connector with a simple and reasonable structure, which can achieve rapid connection with various types of ferrules, has strong flexibility and high connection and installation efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions.

[0006] A universal quick connector, comprising a bolt body, a connector hub, a hub sleeve and a connector valve core, wherein the rear end of the connector hub is threadedly connected to the front end of the bolt body, a plurality of ball grooves are evenly distributed along the circumferential direction on the front end side wall of the connector hub, steel balls are installed in the ball grooves, the hub sleeve is movably sleeved on the outside of the connector hub, the front end inner wall of the hub sleeve is abutted against the steel balls, a sleeve spring is abutted between the hub sleeve and the bolt body, the connector valve core is hollow with an open front end and a closed rear end, the connector valve core is movably arranged in the connector hub, the inner wall of the bolt body is provided with a guide sleeve that seals with the connector valve core, a valve core outer spring is abutted between the connector valve core and the guide sleeve, and an exhaust port is provided on the rear end side wall of the connector valve core;

[0007] The front end inner wall of the joint valve core is provided with a first annular groove and a second annular groove in sequence from front to back, a first sealing ring is embedded in the first annular groove, a second sealing ring is embedded in the second annular groove, and the inner diameter of the first sealing ring is larger than the inner diameter of the second sealing ring;

[0008] The front end of the first annular groove is provided with a first annular step surface, and the rear end of the first annular groove is provided with a second annular step surface. The rear end of the first annular step surface extends to the side wall of the first annular groove, and the front end of the second annular step surface extends to the side wall of the first annular groove. The diameter of the first annular step surface is larger than the diameter of the second annular step surface, and the rear end of the second annular step surface is formed with an annular step.

[0009] Furthermore, a valve core inner spring is provided inside the rear end of the joint valve core.

[0010] Furthermore, the guide sleeve is axially disposed between the bolt body and the joint hub.

[0011] Furthermore, a guide sleeve sealing ring is embedded in the front inner wall of the guide sleeve and is sealed with the outer wall of the joint valve core.

[0012] Furthermore, a valve core sealing ring that seals with the inner wall of the guide sleeve is embedded in the rear end outer wall of the joint valve core.

[0013] Furthermore, a bolt sealing ring is provided between the guide sleeve and the bolt body.

[0014] Furthermore, the front end of the joint valve core is provided with an annular extension portion that abuts against the steel ball, and the inner diameter of the annular extension portion is greater than or equal to the diameter of the first annular step surface.

[0015] Furthermore, the front inner wall of the central sleeve is provided with a sleeve cylindrical section and a sleeve conical section from front to back that cooperate with the steel ball, and the rear end of the sleeve cylindrical section is connected to the front end of the sleeve conical section.

[0016] Furthermore, the front end outer wall of the joint hub is provided with a stopper portion which cooperates with the hub outer sleeve to prevent it from falling off.

[0017] Furthermore, an annular extension portion is axially provided at the front end of the first sealing ring, and the annular extension portion is sleeved on the inside of the first annular step surface. The outer diameter of the annular extension portion is adapted to the diameter of the first annular step surface, and the inner diameter of the annular extension portion is equal to the inner diameter of the first sealing ring.

[0018] The beneficial effects of the present invention are as follows: Compared with the prior art, the universal quick connector provided by the present invention optimizes and improves the structure of the connector valve core. Specifically, by respectively embedding a first sealing ring and a second sealing ring within the connector valve core and providing a first annular step surface and a second annular step surface of different diameters, the quick connector can be quickly connected to plugs of different specifications during use, and the connection seal is reliable. The present invention has a simple and reasonable structure, strong flexibility in use, and high connection and installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall assembly structure of the first embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall assembly structure of the second embodiment of the present invention.

[0021] Figure 3 This is a structural diagram of the American Standard No. 3 ferrule.

[0022] Figure 4 This is a structural diagram of the American Standard No. 5 ferrule.

[0023] Figure 5 This is a structural diagram of the American Standard No. 6 ferrule.

[0024] Figure 6 This is a structural diagram of the American Standard No. 17 ferrule.

[0025] Figure 7 This is a structural diagram of the American Standard No. 19 ferrule.

[0026] Figure 1-7In: 1. Bolt body; 11. Bolt sealing ring; 2. Joint hub; 21. Ball groove; 22. Stopper; 3. Central sleeve; 31. Sleeve cylindrical section; 32. Sleeve conical section; 4. Joint valve core; 41. Annular extension; 42. Exhaust port; 43. First annular groove; 431. First sealing ring; 4311. Annular extension; 44. Second annular groove; 441. Second sealing ring; 45. First annular step surface; 46. Second annular step surface; 47. Annular step; 48. Valve core sealing ring; 5. Steel ball; 6. Sleeve spring; 7. Guide sleeve; 71. Guide sleeve sealing ring; 8. Valve core outer spring; 9. Valve core inner spring; 101. Cylindrical plug-in section; 102. Flat ring; 103. Snap-in groove. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] The following is a first embodiment of the present invention.

[0029] like Figure 1 A universal quick connector shown in the figure includes a bolt body 1, a connector hub 2, a hub sleeve 3 and a connector valve core 4. The rear end of the connector hub 2 is threadedly connected to the front end of the bolt body 1. A number of ball grooves 21 are evenly distributed along the circumferential direction on the front end side wall of the connector hub 2. Steel balls 5 are installed in the ball grooves 21. The hub sleeve 3 is movably sleeved on the outside of the connector hub 2. The front end outer wall of the connector hub 2 is provided with a stop portion 22 that cooperates with the hub sleeve 3 to prevent disengagement. The front end inner wall of the hub sleeve 3 is abutted against the steel ball 5. Specifically, the front end inner wall of the hub sleeve 3 is provided with a sleeve cylindrical section 31 and a sleeve conical section 32 that cooperate with the steel ball 5 from front to back. The rear end of the sleeve cylindrical section 31 is connected to the front end of the sleeve conical section 32. The front end of the connector valve core 4 is provided with an annular extension portion 41 that abuts against the steel ball 5. An outer sleeve spring 6 is interposed between the central outer sleeve 3 and the bolt body 1. The joint valve core 4 is hollow with an open front end and a closed rear end. The joint valve core 4 is movably arranged in the joint central hub 2. The inner wall of the bolt body 1 is provided with a guide sleeve 7 that seals with the joint valve core 4. A valve core outer spring 8 is interposed between the front end of the joint valve core 4 and the guide sleeve 7. The rear end side wall of the joint valve core 4 is provided with an exhaust port 42.

[0030] The above constitutes the main structure of the universal quick connector provided by the present invention. The basic working principle of the present invention is the same as that of the existing quick connector, which will not be described here. For details, please refer to the quick connector disclosed in application number 201521014896.5.

[0031] As an improvement of the present invention, the front inner wall of the connector valve core 4 is provided with a first annular groove 43 and a second annular groove 44, sequentially from front to back. A first sealing ring 431 is embedded in the first annular groove 43, and a second sealing ring 441 is embedded in the second annular groove 44. The inner diameter of the first sealing ring 431 is larger than the inner diameter of the second sealing ring 441. A first annular step surface 45 is provided at the front end of the first annular groove 43, and a second annular step surface 46 is provided at the rear end of the first annular groove 43. The rear end of the first annular step surface 45 extends to the side wall of the first annular groove 43, and the front end of the second annular step surface 46 extends to the side wall of the first annular groove 43. The diameter of the first annular step surface 45 is larger than the diameter of the second annular step surface 46, and an annular step 47 is formed at the rear end of the second annular step surface 46. In this embodiment, to ensure quick connection with the ferrule, the inner diameter of the annular extension 41 is greater than or equal to the diameter of the first annular step surface 45.

[0032] The universal quick connector provided by the present invention optimizes and improves the structure of the connector valve core 4. Specifically, by respectively embedding a first sealing ring 431 and a second sealing ring 441 within the connector valve core 4, and providing a first annular step surface 45 and a second annular step surface 46 of different diameters, the quick connector can be quickly connected to plugs of different specifications during use, and the connection is reliably sealed. The present invention has a simple and reasonable structure, strong flexibility in use, and high connection and installation efficiency.

[0033] In order to facilitate those skilled in the art to understand the structural features and effects of the present invention, this embodiment takes five types of American standard ferrules as examples to specifically illustrate the present invention.

[0034] Figure 3-7 The figure shows the ferrule structures of five American standard models (i.e., No. 3, No. 5, No. 6, No. 17 and No. 19). As can be seen from the figure, the main structures of the five ferrules are basically the same. The plug-in end of each ferrule has a cylindrical plug-in section 101 and a clamping groove 103, and a flat ring 102 is formed between the cylindrical plug-in section 101 and the clamping groove 103. The difference lies in the different sizes of the plug-in ends of the ferrules, which are specifically reflected in the axial length of the cylindrical plug-in section 101 and the diameter of the flat ring 102. For example, by comparison, the outer diameters of the cylindrical plug-in section 101 of the No. 3, No. 6 and No. 19 ferrules are relatively large, while the outer diameter of the cylindrical plug-in section 101 of the No. 17 ferrule is relatively small, but the axial length of the cylindrical plug-in section 101 of the No. 17 ferrule is relatively long.

[0035] When the No. 3 and No. 6 plugs are connected to the quick connector, the cylindrical plug-in section 101 of the plug is inserted into the joint valve core 4, the end of the cylindrical plug-in section 101 abuts against the annular step 47, and pushes the joint valve core 4 to move backward relative to the joint hub 2, so that the steel ball 5 is stuck in the plug-in groove 103. In these two assembly connection states, the joint valve core 4 is in sealing contact with the outer wall of the cylindrical plug-in section 101 of the No. 3 and No. 6 plugs through the inner wall of the first sealing ring 431, thereby achieving a sealed connection effect.

[0036] When the No. 5 and No. 19 plugs are connected to the quick connector, the end of the cylindrical plug section 101 of the plug abuts against the front end face of the first sealing ring 431, and pushes the joint valve core 4 to move backward relative to the joint hub 2, so that the steel ball 5 is stuck in the plug's clamping groove 103. In these two assembly connection states, the joint valve core 4 is in sealing contact with the end faces of the No. 5 and No. 19 plugs through the front end face of the first sealing ring 431, achieving a sealed connection effect.

[0037] When the No. 17 plug is connected to the quick connector, the end of the cylindrical plug section 101 of the plug passes through the second sealing ring 441 and extends into the rear end of the joint valve core 4, pushing the joint valve core 4 to move backward relative to the joint hub 2, so that the steel ball 5 is stuck in the plug's clamping groove 103. In this assembled connection state, the joint valve core 4 is in sealing contact with the outer wall of the cylindrical plug section 101 of the No. 17 plug through the inner wall of the second sealing ring 441, achieving a sealed connection effect.

[0038] It should be noted that, since this embodiment is illustrated by taking five types of American standard ferrules as examples, the specific dimensions of the first sealing ring 431, the second sealing ring 441, the first annular step surface 45, the second annular step surface 46 and the annular step 47 are all adapted to the corresponding dimensions of the above five types of American standard ferrules.

[0039] Preferably, a valve core inner spring 9 is provided inside the rear end of the connector valve core 4. For a relatively slender plug core with a cylindrical plug section 101 (such as an ANSI No. 17 plug core), when the plug core is plugged into the connector valve core 4, the elastic effect of the valve core inner spring 9 can ensure that the plug core will not loosen. To prevent the valve core inner spring 9 from shaking within the connector valve core 4, during assembly, the valve core inner spring 9 can be installed into the connector valve core 4 with an appropriate interference fit. In this way, when the valve core inner spring 9 is not compressed by the plug core, the interference fit force of the inner wall of the connector valve core 4 can prevent shaking. When the plug core abuts the valve core inner spring 9, the valve core inner spring 9 can also prevent the plug core from loosening.

[0040] Preferably, the guide sleeve 7 is axially arranged between the bolt body 1 and the joint hub 2. In other words, the guide sleeve 7 of the present invention is a split structure relative to the bolt body 1 and the joint valve core 4. This is not only convenient for installation, but also simpler in production and processing, and is more conducive to ensuring the coaxiality of the product.

[0041] Furthermore, in order to improve the internal sealing of the present invention, a guide sleeve sealing ring 71 is embedded in the front end inner wall of the guide sleeve 7 and is sealed with the outer wall of the joint valve core 4; a valve core sealing ring 48 is embedded in the rear end outer wall of the joint valve core 4 and is sealed with the inner wall of the guide sleeve 7; a bolt sealing ring 11 is provided between the guide sleeve 7 and the bolt body 1.

[0042] The following is a second embodiment of the present invention.

[0043] The basic structure and working principle of this embodiment are the same as those of the above embodiment 1, and the only difference is that: Figure 2 As shown, an annular extension portion 4311 is axially provided at the front end of the first sealing ring, and the annular extension portion 4311 is sleeved on the inside of the first annular step surface. The outer diameter of the annular extension portion 4311 is adapted to the diameter of the first annular step surface, and the inner diameter of the annular extension portion 4311 is equal to the inner diameter of the first sealing ring.

[0044] When the No. 3 and No. 6 plugs are connected to the quick connector, the cylindrical plug-in section 101 of the plug is inserted into the joint valve core 4, and the end of the cylindrical plug-in section 101 abuts against the annular step 47, pushing the joint valve core 4 to move backward relative to the joint hub 2, so that the steel ball 5 is stuck in the plug-in groove 103. In these two assembly connection states, the joint valve core 4 is in sealing contact with the outer wall of the cylindrical plug-in section 101 of the No. 3 and No. 6 plugs through the inner wall of the first sealing ring 431 and the inner wall of the annular extension 4311, thereby achieving a sealed connection effect.

[0045] When the No. 5 and No. 19 plugs are connected to the quick connector, the end of the cylindrical plug section 101 of the plug abuts against the front end face of the annular extension 4311 of the first sealing ring 431, and pushes the joint valve core 4 to move backward relative to the joint hub 2, so that the steel ball 5 is stuck in the clamping groove 103 of the plug. In these two assembly connection states, the joint valve core 4 is in sealing contact with the end faces of the No. 5 and No. 19 plugs through the front end face of the annular extension 4311, achieving a sealed connection effect.

[0046] When the No. 17 plug is connected to the quick connector, the connection and sealing method are the same as those in the above embodiment 1, so they will not be described here in detail.

[0047] In this embodiment, an annular extension 4311 is provided at the front end of the first sealing ring 431 to further improve the sealing performance when connecting with different ferrules. At the same time, for ferrules No. 3 and No. 6, when used in a high-pressure fluid environment (generally 300 PSI), the annular extension 4311 can prevent the first sealing ring 431 from falling off when the ferrule is removed from the quick connector, thereby ensuring the continuous and reliable use of the quick connector.

[0048] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A universal quick connector, comprising a bolt body, a connector hub, a hub sleeve and a connector valve core, the rear end of the connector hub being threadedly connected to the front end of the bolt body, a plurality of ball grooves being evenly distributed along the circumferential direction on the front end side wall of the connector hub, steel balls being installed in the ball grooves, the hub sleeve being movably sleeved on the outside of the connector hub, the front end inner wall of the hub sleeve being abutted against the steel balls, a sleeve spring being abutted between the hub sleeve and the bolt body, the connector valve core being hollow with an open front end and a closed rear end, the connector valve core being movably arranged in the connector hub, the inner wall of the bolt body being provided with a guide sleeve that is sealed with the connector valve core, a valve core outer spring being abutted between the connector valve core and the guide sleeve, and an exhaust port being provided on the rear end side wall of the connector valve core, characterized in that: The front end inner wall of the joint valve core is provided with a first annular groove and a second annular groove in sequence from front to back, a first sealing ring is embedded in the first annular groove, a second sealing ring is embedded in the second annular groove, and the inner diameter of the first sealing ring is larger than the inner diameter of the second sealing ring; The front end of the first annular groove is provided with a first annular step surface, and the rear end of the first annular groove is provided with a second annular step surface. The rear end of the first annular step surface extends to the side wall of the first annular groove, and the front end of the second annular step surface extends to the side wall of the first annular groove. The diameter of the first annular step surface is larger than the diameter of the second annular step surface, and the rear end of the second annular step surface is formed with an annular step.

2. The universal quick connector according to claim 1, characterized in that: A valve core inner spring is arranged inside the rear end of the joint valve core.

3. The universal quick connector according to claim 1, characterized in that: The guide sleeve is axially disposed between the bolt body and the joint hub.

4. The universal quick connector according to claim 1 or 3, characterized in that: A guide sleeve sealing ring is embedded in the front inner wall of the guide sleeve and is sealed with the outer wall of the joint valve core.

5. The universal quick connector according to claim 1 or 3, characterized in that: A valve core sealing ring which is in sealing cooperation with the inner wall of the guide sleeve is embedded in the rear end outer wall of the joint valve core.

6. The universal quick connector according to claim 3, characterized in that: A bolt sealing ring is provided between the guide sleeve and the bolt body.

7. The universal quick connector according to claim 1, characterized in that: The front end of the joint valve core is provided with an annular extension portion that abuts against the steel ball, and the inner diameter of the annular extension portion is greater than or equal to the diameter of the first annular step surface.

8. The universal quick connector according to claim 1, characterized in that: The front inner wall of the central sleeve is provided with a sleeve cylindrical section and a sleeve conical section from front to back, which cooperate with the steel ball. The rear end of the sleeve cylindrical section is connected to the front end of the sleeve conical section.

9. The universal quick connector according to claim 1, characterized in that: The front end outer wall of the joint hub is provided with a stopper which cooperates with the hub outer sleeve to prevent it from falling off.

10. The universal quick connector according to claim 1, characterized in that: An annular extension portion is axially provided at the front end of the first sealing ring, and the annular extension portion is sleeved on the inside of the first annular step surface. The outer diameter of the annular extension portion is adapted to the diameter of the first annular step surface, and the inner diameter of the annular extension portion is equal to the inner diameter of the first sealing ring.

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