A quick connect device with internal locking

Abstract

The utility model discloses a kind of inner locking quick coupling devices, it is related to quick coupling technical field.The utility model includes fixed pipe and sealing locking assembly, the inner chamber of fixed pipe is provided with conical head, the top of conical head is communicated with installation pipe, the both sides of fixed pipe are evenly provided with extrusion fixing mechanism, sealing locking assembly includes baffle, the both sides of baffle are fixedly connected with the inner wall of fixed pipe.The utility model is through sealing locking assembly, utilize screw rotation to promote slope block and drive extrusion ring to move steadily along slide bar upwards, the even radial extrusion of flexible conical cover is implemented, make its inner wall and conical head outer surface overall adhesion, form continuous and stress distribution even sealing ring belt, overcome the flexible conical cover plastic deformation and resilience decline problem caused by traditional eccentric wheel single point continuous compression, effectively maintain the sealing reliability after multiple disassembly, prevent medium leakage.

Description

Technical Field

[0001] This utility model belongs to the field of quick coupling technology, and in particular relates to an internal locking quick coupling device. Background Technology

[0002] Internal locking quick couplings are devices used for connecting fluid system pipelines. Their design features include a precision locking mechanism inside, allowing operators to quickly connect or disconnect the coupling without the need for external tools. Thanks to their built-in self-locking components, they automatically lock and form a reliable seal when inserted, making them widely used in hydraulic, pneumatic, chemical and other fields.

[0003] Existing lever-type quick couplings typically consist of a coupling body, an operating lever, an eccentric compression head, and an inner tube with a sealing groove. By pressing down the operating lever, the eccentric compression head rotates, using its eccentric profile to radially compress the inner tube, forcing the outer wall of the inner tube to deform and embed into the inner wall groove of the outer coupling to achieve mechanical connection and sealing.

[0004] However, in actual use, the sealing effect of this structure gradually deteriorates with the number of operations. The root cause is that during the repeated rotation and pressure application, the eccentric extrusion head always compresses the sealing element in a single direction and at a fixed contact point. This causes the sealing ring or soft pad to be subjected to excessive plastic deformation locally and lose its elasticity. At the same time, the recovery of the radial deformation of the inner tube is also weakened, resulting in local crushing or gaps in the sealing ring formed by extrusion, which ultimately leads to media leakage and is not conducive to use.

[0005] To address these issues, we provide an internal locking quick coupling device. Utility Model Content

[0006] The purpose of this invention is to provide an internal locking quick coupling device, which solves the problem that the sealing effect of existing quick coupling devices is prone to decline after repeated disassembly and assembly, causing leakage of the conveying medium, through the cooperation of the sealing locking component and the compression fixing mechanism.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to an internal locking quick connector device, comprising a fixed tube and a sealing and locking assembly. The inner cavity of the fixed tube is provided with a conical head, the top of which is connected to an installation tube. Both sides of the fixed tube are provided with compression and fixing mechanisms. The sealing and locking assembly includes a partition plate, both sides of which are fixedly connected to the inner wall of the fixed tube. The bottom of the partition plate is connected to a flexible conical cover, and a compression ring is sleeved on the surface of the flexible conical cover. A slope block is fixedly connected to the front side of the compression ring. A screw is provided on the front side of the fixed tube, and the rear side of the screw extends into the inner cavity of the fixed tube. A sliding rod is fixedly connected to the rear side of the bottom of the inner cavity of the fixed tube. A spring and a sliding sleeve are sequentially sleeved on the surface of the sliding rod from top to bottom, and the front side of the sliding sleeve is fixedly connected to the compression ring.

[0009] The present invention is further configured such that the compression fixing mechanism includes two limiting shells, each of which is fixedly connected to a fixing tube on its opposite side. An eccentric wheel is movably connected between the front and rear sides of the inner cavity of the limiting shell. An operating handle is fixedly connected to the opposite side of each of the two eccentric wheels. An installation groove is provided on the surface of the conical head. The limiting shell facilitates the installation of the eccentric wheel. The eccentric wheel can compress the installation groove of the conical head, so that the conical head fits tightly against the inner wall of the flexible conical cover. The operating handle allows the operator to control the operating angle of the eccentric wheel.

[0010] The present invention is further configured such that a rotating sleeve is threadedly connected to the bottom of the surface of the fixed tube, a turntable is fixedly connected to the surface of the rotating sleeve, a conical shell is fixedly connected to the top of the surface of the rotating sleeve, and anti-slip texture is fixedly connected to the surface of the turntable. The rotating sleeve can rotate on the surface of the fixed tube, and the conical shell is moved upward by the thread between the two. After the conical shell moves, it can lock the two operating handles and limit and fix them to prevent them from accidentally loosening and causing the seal between the fixed tube and the installation tube to fail.

[0011] The present invention is further configured such that the front side of the screw passes through the fixing tube and is fixedly connected to a knob, and the front and rear sides of the conical head are provided with installation notches. The knob allows the operator to easily rotate the screw, and the installation notches facilitate the insertion of the conical head into the fixing tube, thus preventing the eccentric wheel from jamming the conical head.

[0012] The present invention is further configured such that baffles are fixedly connected to both sides of the slope block, an extrusion head is movably connected to the rear side of the screw, a threaded sleeve is threadedly connected to the surface of the screw, the bottom of the threaded sleeve is fixedly connected to the inner wall of the fixed tube, the baffles can limit the extrusion head, the extrusion head can cooperate with the screw to extrude the slope block, and the threaded sleeve can limit the screw, thereby improving the stability of the slope block extrusion process.

[0013] The present invention is further configured such that the top of both sides of the fixed tube is provided with mounting through holes for use with the eccentric wheel, and the front and rear sides of the eccentric wheel are movably connected to the inner wall of the limiting shell through bearings. The mounting through holes facilitate the eccentric wheel to squeeze the mounting groove, and the bearings can improve the stability of the eccentric wheel during rotation.

[0014] The present invention is further configured such that a fixing ring is connected to the bottom of the flexible conical cover, and the surface of the fixing ring is fixedly connected to the inner wall of the fixing tube, so that the fixing ring can securely install the flexible conical cover inside the fixing tube.

[0015] The present invention has the following beneficial effects.

[0016] 1. This utility model uses a sealing and locking assembly to drive the slope block by rotating the screw, which in turn drives the extrusion ring to move smoothly upward along the slide bar. This applies uniform radial extrusion to the flexible conical cover, making its inner wall fully fit with the outer surface of the conical head, forming a continuous and uniformly stress-distributed sealing ring. This overcomes the problem of plastic deformation and reduced springback of the flexible conical cover caused by continuous single-point pressure from the traditional eccentric wheel, effectively maintaining the sealing reliability after multiple disassemblies and reassemblies, and preventing media leakage.

[0017] 2. This utility model uses a pressing and fixing mechanism to achieve initial locking by rotating the eccentric wheel with the operating handle to press the mounting groove of the conical head. Then, the rotating sleeve drives the conical shell to move upward to cover and restrict the position of the operating handle, forming a double lock. This prevents the eccentric wheel from rotating and loosening due to vibration or accidental contact, ensuring connection stability. At the same time, the evenly distributed pressing force reduces local wear on the flexible conical cover and extends the service life of the joint. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 A perspective view of an internal locking quick coupling device; Figure 2 A cross-sectional view of a fixed tube in an internal locking quick coupling device; Figure 3 A cross-sectional view of a fixed tube and a rotating sleeve in an internal locking quick coupling device; Figure 4 A partial sectional view of the fixing tube in an internal locking quick coupling device; Figure 5 This is a schematic diagram of a flexible conical cover and a compression ring in an internal locking quick coupling device.

[0020] In the attached diagram: 1. Fixed tube; 2. Conical head; 3. Mounting tube; 4. Sealing and locking assembly; 41. Partition plate; 42. Flexible conical cover; 43. Extrusion ring; 44. Sloping block; 45. Screw; 46. Sliding rod; 47. Spring; 48. Sliding sleeve; 5. Extrusion fixing mechanism; 51. Limiting shell; 52. Eccentric wheel; 53. Operating handle; 54. Rotating sleeve; 55. Turntable; 56. Conical shell; 6. Fixed ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1 Please see Figure 1-5 This utility model is an internal locking quick connector device, including a fixed tube 1 and a sealing and locking assembly 4. The inner cavity of the fixed tube 1 is provided with a conical head 2, and the top of the conical head 2 is connected to an installation tube 3. Both sides of the fixed tube 1 are provided with compression and fixing mechanisms 5. The sealing and locking assembly 4 includes a partition plate 41, both sides of which are fixedly connected to the inner wall of the fixed tube 1. The bottom of the partition plate 41 is connected to a flexible conical cover 42. The surface of the flexible conical cover 42 is fitted with a compression ring 43. The front side of the compression ring 43 is fixedly connected to a slope block 44. The front side of the fixed tube 1 is provided with a screw 45, and the rear side of the screw 45 extends into the inner cavity of the fixed tube 1. The rear side of the bottom of the inner cavity of the fixed tube 1 is fixedly connected to a sliding rod 46. The surface of the sliding rod 46 is fitted with a spring 47 and a sliding sleeve 48 from top to bottom. The front side of the sliding sleeve 48 is fixedly connected to the compression ring 43.

[0023] Specifically: the conical head 2 can be inserted into the fixed pipe 1, and the installation pipe 3 is connected to the conical head 2, which facilitates the transport of media between the fixed pipe 1 and the installation pipe 3. The compression fixing mechanism 5 can insert the conical head 2 into the fixed pipe 1 and make it fit tightly against the flexible conical cover 42, improving the sealing effect of the connection between the two. The screw 45 can compress the inclined surface of the slope block 44, so that it controls the compression ring 43 to compress the flexible conical cover 42 upward. Through the cooperation of the compression fixing mechanism 5 and the sealing locking component 4, the installation pipe 3 and the fixed pipe 1 are tightly connected, avoiding the leakage of media after multiple installations. The slide rod 46 and the slide sleeve 48 can limit the compression ring 43, so that it can move up and down smoothly.

[0024] Example 2 Please see Figure 1-5Based on Embodiment 1, the extrusion fixing mechanism 5 includes two limiting shells 51. The opposite sides of each limiting shell 51 are fixedly connected to the fixing tube 1. An eccentric wheel 52 is movably connected between the front and rear sides of the inner cavity of the limiting shell 51. An operating handle 53 is fixedly connected to the opposite sides of each of the two eccentric wheels 52. An installation groove is provided on the surface of the conical head 2. A rotating sleeve 54 is threaded to the bottom of the surface of the fixing tube 1. A turntable 55 is fixedly connected to the surface of the rotating sleeve 54. A conical shell 56 is fixedly connected to the top of the surface of the rotating sleeve 54. Anti-slip textures are fixedly connected to the surface of the turntable 55. The front side of the screw 45 passes through... A knob is fixedly connected to the fixed tube 1. The front and rear sides of the conical head 2 are provided with installation notches. Both sides of the slope block 44 are fixedly connected with baffles. The rear side of the screw 45 is movably connected with an extrusion head. The surface of the screw 45 is threadedly connected with a threaded sleeve. The bottom of the threaded sleeve is fixedly connected to the inner wall of the fixed tube 1. The top of both sides of the fixed tube 1 is provided with installation through holes that cooperate with the eccentric wheel 52. The front and rear sides of the eccentric wheel 52 are movably connected to the inner wall of the limiting shell 51 through bearings. The bottom of the flexible conical cover 42 is connected to a fixing ring 6. The surface of the fixing ring 6 is fixedly connected to the inner wall of the fixed tube 1.

[0025] Specifically: the limiting shell 51 facilitates the installation of the eccentric wheel 52, which in turn presses against the mounting groove of the conical head 2, causing the conical head 2 to fit tightly against the inner wall of the flexible conical cover 42. The operating handle 53 allows the operator to easily control the operating angle of the eccentric wheel 52. The rotating sleeve 54 can rotate on the surface of the fixed tube 1, and the thread between the two controls the upward movement of the conical shell 56. After movement, the conical shell 56 can lock the two operating handles 53, limiting and fixing them to prevent accidental loosening and loss of fixation. The seal between pipe 1 and installation pipe 3 fails. The knob allows the operator to easily rotate the screw 45. The installation notch facilitates the insertion of the conical head 2 into the fixed pipe 1, preventing the eccentric wheel 52 from jamming the conical head 2. The baffle limits the extrusion head. The extrusion head can cooperate with the screw 45 to extrude the slope block 44. The threaded sleeve limits the screw 45, improving its stability during the extrusion of the slope block 44. The installation through hole facilitates the eccentric wheel 52 to extrude the installation groove. The bearing improves the stability of the eccentric wheel 52 during rotation.

[0026] The working principle of this utility model is as follows: The conical head 2 is inserted into the inner cavity of the fixed tube 1. Then, the operating handle 53 is pressed, causing it to control the eccentric wheel 52 to press against the mounting groove on the surface of the conical head 2, causing the conical head 2 to move downwards and fit against the inner wall of the flexible conical cover 42, achieving initial locking. Then, the knob is rotated, causing the screw 45 to rotate. The screw 45 pushes the extrusion head to apply pressure to the inclined surface of the slope block 44. The slope block 44 causes the extrusion ring 43 to slide upwards along the slide rod 46. The extrusion ring 43 performs uniform radial extrusion on the flexible conical cover 42, causing its inner wall to fit against the conical head. 2. The outer surface fully contacts to form a sealing ring, overcoming the problem of plastic deformation and reduced springback ability of the flexible conical cover 42 caused by continuous single-point pressure of the traditional eccentric wheel 52. It effectively maintains the sealing reliability after multiple disassembly and assembly, prevents media leakage, and finally the rotating turntable 55 drives the rotating sleeve 54 to rotate. The conical shell 56 moves upward and covers the operating handle 53 to prevent it from rotating back accidentally. It avoids the eccentric wheel 52 from rotating and loosening due to vibration or accidental contact, ensuring connection stability. At the same time, the evenly distributed clamping force reduces local wear on the flexible conical cover 42 and extends the service life of the joint.

[0027] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. An internal locking quick coupling device, comprising a fixing tube (1) and a sealing locking assembly (4), characterized in that: The inner cavity of the fixed tube (1) is provided with a conical head (2), the top of the conical head (2) is connected to an installation tube (3), and both sides of the fixed tube (1) are provided with a compression fixing mechanism (5). The sealing and locking assembly (4) includes a partition (41), both sides of which are fixedly connected to the inner wall of the fixed tube (1). The bottom of the partition (41) is connected to a flexible conical cover (42). A compression ring (43) is sleeved on the surface of the flexible conical cover (42). A slope block (44) is fixedly connected to the front side of the compression ring (43). A screw (45) is provided on the front side of the fixed tube (1). The rear side of the screw (45) extends into the inner cavity of the fixed tube (1). A slide rod (46) is fixedly connected to the rear side of the bottom of the inner cavity of the fixed tube (1). A spring (47) and a sliding sleeve (48) are sleeved on the surface of the slide rod (46) from top to bottom. The front side of the sliding sleeve (48) is fixedly connected to the compression ring (43).

2. The internal locking quick coupling device according to claim 1, characterized in that: The compression fixing mechanism (5) includes two limiting shells (51). The opposite sides of the two limiting shells (51) are fixedly connected to the fixing tube (1). An eccentric wheel (52) is movably connected between the front and rear sides of the inner cavity of the limiting shell (51). An operating handle (53) is fixedly connected to the opposite sides of the two eccentric wheels (52). An installation groove is opened on the surface of the conical head (2).

3. The internal locking quick coupling device according to claim 1, characterized in that: A rotating sleeve (54) is threadedly connected to the bottom of the surface of the fixed tube (1), a turntable (55) is fixedly connected to the surface of the rotating sleeve (54), a conical shell (56) is fixedly connected to the top of the surface of the rotating sleeve (54), and anti-slip texture is fixedly connected to the surface of the turntable (55).

4. The internal locking quick coupling device according to claim 1, characterized in that: The front side of the screw (45) passes through the fixing tube (1) and is fixedly connected to a knob. The front and rear sides of the conical head (2) are provided with installation notches.

5. The internal locking quick coupling device according to claim 1, characterized in that: Both sides of the slope block (44) are fixedly connected to baffles, the rear side of the screw (45) is movably connected to an extrusion head, the surface of the screw (45) is threadedly connected to a threaded sleeve, and the bottom of the threaded sleeve is fixedly connected to the inner wall of the fixed tube (1).

6. The internal locking quick coupling device according to claim 2, characterized in that: The top of both sides of the fixed tube (1) is provided with mounting through holes for use with the eccentric wheel (52). The front and rear sides of the eccentric wheel (52) are movably connected to the inner wall of the limiting shell (51) through bearings.

7. The internal locking quick coupling device according to claim 1, characterized in that: The bottom of the flexible conical cover (42) is connected to a fixing ring (6), and the surface of the fixing ring (6) is fixedly connected to the inner wall of the fixing tube (1).

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