A high-pressure and fast connector for plastic pipes

Abstract

The present invention relates to a high-pressure quick connector for plastic pipes, which includes an outer fixing pipe for providing external support, an inner connecting mechanism for cooperatively sealing the inner water pipe, and a locking mechanism for preventing loosening and locking the inner connecting mechanism. The two ends of the inner side of the outer fixing pipe respectively correspond to two sections of water pipes. The inner connecting mechanism is installed at the opening position of the water pipe on the inner side of the outer fixing pipe. The locking mechanism is located outside the inner connecting mechanism. A conical ring portion of the upper sealing rubber ring of the inner connecting mechanism is provided at the stepped position of the inner side of the outer fixing pipe and the water pipe opening. A plurality of guiding blocks are circumferentially arranged on the inner side surface of the conical ring portion to solve the technical problem that in the current high-pressure plastic pipe connection method, vortices are caused due to high-pressure water and steps at the interface, resulting in connector oscillation and thus loosening and water leakage.

Description

Technical Field

[0001] The present invention relates to the field of connectors, and specifically to a high-pressure quick connector for plastic pipes. Background Art

[0002] A high-pressure quick connector for plastic pipes is a quick-sealing device designed specifically for high-pressure fluid transmission. It is usually made of plastic or composite materials and realizes the quick connection and disconnection of pipes through snap-fasteners, claw teeth or flexure structures. Its core functions are to ensure tightness, pressure resistance and operational convenience in a high-pressure environment.

[0003] In the prior art, a Chinese invention with the publication number CN117212585A discloses a high-pressure quick connector for plastic pipes, which cooperates with pipes through connection blocks. However, in the actual field of plastic pipe transmission and operation process, high-pressure water flow generally accompanies frequent start-stop and pulsation, and the steps at the interface will cause vortices due to the frequent pulsation of high-pressure water flow. When the subsequent water flow impacts the vortices, oscillations will occur. In a continuous high-frequency oscillation environment, there is a risk of leakage. In order to ensure cross-connection when using a docking connector, there are movable clearance amounts at both ends. Although the liquid pressure in the plastic pipe transmission is limited within 2.5 MPa, reasons such as the formation of vortices, continuous oscillations and water hammers at the internal interface will also cause the deviation of the connector. Summary of the Invention

[0004] The present invention provides a high-pressure quick connector for plastic pipes to solve the technical problem that in the current high-pressure plastic pipe connection method, vortices are caused due to high-pressure water and steps at the interface, triggering connector oscillations and thus causing loosening and water leakage.

[0005] A high-pressure quick connector for plastic pipes of the present invention adopts the following technical solutions: It includes an outer fixed pipe for providing external support, an inner connection mechanism for sealingly cooperating with the internal water pipe, and a locking mechanism for preventing loosening and locking the inner connection mechanism. The two ends inside the outer fixed pipe respectively correspond to two sections of water pipes. The inner connection mechanism is installed inside the outer fixed pipe at the position of the water pipe opening. The locking mechanism is located outside the inner connection mechanism. A conical ring part of the upper sealing rubber ring of the inner connection mechanism is provided at the stepped position of the inner side of the outer fixed pipe and the water pipe opening. A plurality of guiding blocks are circumferentially arranged in an array on the inner side surface of the conical ring part;

[0006] An inner support assembly is arranged inside the sealing rubber ring. The inner support assembly is used to support the conical ring part of the sealing rubber ring. After the inner support assembly supports the conical ring part of the sealing rubber ring, the steps at the cooperating position of the water pipe and the outer fixed pipe are filled, thereby reducing the vortices caused by the steps and avoiding subsequent oscillations and loosening caused by the vortices;

[0007] One side of the sealing rubber ring is cooperated with the locking mechanism through a telescopic component. The locking mechanism is used to provide preliminary position adjustment and support for the sealing rubber ring, and the locking component on the locking mechanism is used to prevent the telescopic component from loosening.

[0008] Further, the inner support component includes a force-receiving piece, an extrusion bracket, a support bracket, and an expansion bracket. The force-receiving piece, the extrusion bracket, the support bracket, and the expansion bracket are integrally formed. The force-receiving piece is a circular thin sheet for transmitting the extrusion force provided by the locking mechanism from left to right as preliminary adjustment support. The force-receiving piece transmits the extrusion force to the extrusion bracket. The extrusion bracket is composed of two outwardly convex arc-shaped sheets. After being extruded by the force-receiving piece on the left side, it will extrude and tighten the water pipe and the outer fixing pipe on both the inner and outer sides for fitting. The extrusion bracket transmits the extrusion force to the expansion bracket through the support bracket. The support bracket is an X-shaped cross sheet, and the expansion bracket is a V-shaped circular ring sheet. The V-shaped opening of the expansion bracket corresponds to the support bracket. The expansion bracket can open when being supported by the support bracket, and the expansion bracket fits the conical ring part of the sealing rubber ring.

[0009] Further, the telescopic component includes a first mating thread provided on the sealing rubber ring, and a second mating thread is correspondingly provided on the lock cylinder of the locking mechanism. The first mating thread and the second mating thread are in cooperation.

[0010] Further, the locking component of the locking mechanism includes a misalignment piece. The misalignment piece is slidably connected to the inside of the lock cylinder along the axial direction. The two misalignment pieces are symmetrically arranged inside the lock cylinder. The inner side surface of the misalignment piece is provided with misalignment teeth. One end of the misalignment piece away from the sealing rubber ring is provided with an extrusion block. The extrusion block is rotatably connected to the lock cylinder. The outside of the extrusion block is connected with a lock rod. The extrusion block is provided with a convex block for extruding the misalignment piece to move. The lock rod is an L-shaped dial block.

[0011] Further, four extrusion brackets are provided and are arranged in a circumferential array inside the sealing rubber ring.

[0012] Further, the extrusion bracket is of an arc structure, and the radian range of the extrusion bracket is 30° - 45°.

[0013] Further, the expansion bracket is provided with a slotted groove for releasing stress, so that the expansion bracket can contract when being extruded by the water pipe and the outer fixing pipe, and can open when being supported by the support bracket.

[0014] Further, the guide block is an arc-shaped sheet, and the guide block is integrally formed on the sealing rubber ring.

[0015] Further, the height of the guiding block at the water inlet end is lower than that of the guiding block at the water outlet end.

[0016] Further, the misaligned piece is an arc-shaped piece, and when being squeezed by the squeezing block, the arc-shaped structure is used to avoid bending. The radian range of the misaligned piece is 10° - 20°.

[0017] The beneficial effects of the present invention are as follows: The present invention uses the locking mechanism to push the inner connection mechanism to fill the steps at the mating position of the water pipe and the outer fixing pipe. At the same time, the guiding block is used to guide and stabilize the water flow, thereby avoiding the loosening of the interface when the high-pressure water undergoes pressure changes and continuous impacts. And the locking mechanism is used to lock the inner connection mechanism to avoid mechanical loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the external structure of an embodiment of a high-pressure quick connector for plastic pipes of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of an embodiment of a high-pressure quick connector for plastic pipes of the present invention;

[0021] Figure 3 It is a schematic diagram of the external structure of the sealing rubber ring of an embodiment of a high-pressure quick connector for plastic pipes of the present invention;

[0022] Figure 4 It is a schematic diagram of the internal structure of the sealing rubber ring of an embodiment of a high-pressure quick connector for plastic pipes of the present invention;

[0023] Figure 5 It is a schematic diagram of the internal support assembly structure of an embodiment of a high-pressure quick connector for plastic pipes of the present invention;

[0024] Figure 6 It is a schematic diagram of the internal structure of the locking mechanism of an embodiment of a high-pressure quick connector for plastic pipes of the present invention;

[0025] Figure 7 It is a main view cross-sectional view of an embodiment of a high-pressure quick connector for plastic pipes of the present invention;

[0026] Figure 8 It is a partial cross-sectional view of the internal support assembly of an embodiment of a high-pressure quick connector for plastic pipes of the present invention;

[0027] Figure 9 Schematic diagram of the locking state structure of the locking rod in an embodiment of a high-pressure quick connector for plastic pipes according to the present invention;

[0028] Figure 10 Schematic diagram of the non-locking state structure of the locking rod in an embodiment of a high-pressure quick connector for plastic pipes according to the present invention;

[0029] Figure 11 Schematic diagram of the misaligned tooth structure in an embodiment of a high-pressure quick connector for plastic pipes according to the present invention.

[0030] In the figure: 1, water pipe; 2, outer fixing pipe; 3, locking mechanism; 4, inner connecting mechanism; 5, guiding block; 31, locking rod; 32, locking cylinder; 33, extrusion block; 34, misaligned piece; 341, misaligned tooth; 41, sealing rubber ring; 42, first mating thread; 43, inner support assembly; 44, second mating thread; 431, force-bearing piece; 432, extrusion bracket; 433, support bracket; 434, expansion bracket. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] An embodiment of a high-pressure quick connector for plastic pipes according to the present invention, as Figures 1 to 11 shown, includes an outer fixing pipe 2 for providing external support, an inner connecting mechanism 4 for cooperatively sealing the internal water pipe 1, and a locking mechanism 3 for providing anti-loosening and locking for the inner connecting mechanism 4. The two ends of the inner side of the outer fixing pipe 2 respectively correspond to two sections of the water pipe 1. The inner connecting mechanism 4 is installed at the opening position of the water pipe 1 on the inner side of the outer fixing pipe 2. The locking mechanism 3 is located outside the inner connecting mechanism 4. A conical ring portion of the sealing rubber ring 41 on the inner connecting mechanism 4 is provided at the stepped position of the inner side of the outer fixing pipe 2 and the opening of the water pipe 1, as Figure 7 , Figure 8 shown. A plurality of guiding blocks 5 are circumferentially arranged in an array on the inner side surface of the conical ring portion;

[0033] An inner support assembly 43 is arranged inside the sealing rubber ring 41. The inner support assembly 43 is used to support the conical ring portion of the sealing rubber ring 41. After the inner support assembly 43 supports the conical ring portion of the sealing rubber ring 41, the step at the mating position of the water pipe 1 and the outer fixing pipe 2 is filled, thereby reducing the vortex caused by the step and avoiding subsequent oscillation and loosening caused by the vortex;

[0034] On one side of the sealing rubber ring 41, it is cooperated with the locking mechanism 3 through the telescopic component. The locking mechanism 3 is used to provide preliminary position adjustment and support for the sealing rubber ring 41, and the locking component on the locking mechanism 3 is used to prevent the loosening of the telescopic component.

[0035] In this embodiment, the inner support component 43 includes a force-receiving piece 431, an extrusion bracket 432, a support bracket 433, and an expansion bracket 434. The force-receiving piece 431, the extrusion bracket 432, the support bracket 433, and the expansion bracket 434 are integrally formed. The force-receiving piece 431 is a circular ring thin sheet for transmitting the squeezing force provided by the locking mechanism 3 from left to right as preliminary adjustment support. The force-receiving piece 431 transmits the squeezing force to the extrusion bracket 432. The extrusion bracket 432 is composed of two outwardly convex arc-shaped sheets. After being squeezed by the left-side force-receiving piece 431, it will squeeze and tighten the water pipe 1 and the outer fixing pipe 2 on both the inner and outer sides. The extrusion bracket 432 transmits the squeezing force to the expansion bracket 434 through the support bracket 433. The support bracket 433 is an X-shaped cross sheet, and the expansion bracket 434 is a V-shaped circular ring sheet as Figure 7 、 Figure 8 shown. The V-shaped opening of the expansion bracket 434 corresponds to the support bracket 433. When the expansion bracket 434 is supported by the support bracket 433, it can open, and the expansion bracket 434 fits against the conical ring part of the sealing rubber ring 41.

[0036] In this embodiment, the telescopic component includes a first mating thread 42 provided on the sealing rubber ring 41, and a second mating thread 44 is correspondingly provided on the lock cylinder 32 of the locking mechanism 3. The first mating thread 42 and the second mating thread 44 are in cooperation.

[0037] In this embodiment, the locking component of the locking mechanism 3 includes a misalignment piece 34. The misalignment piece 34 is slidably connected along the axial direction inside the lock cylinder 32. Two misalignment pieces 34 are symmetrically arranged inside the lock cylinder 32. The inner side surface of the misalignment piece 34 is provided with misalignment teeth 341. When the misalignment teeth 341 are in the initial position, they overlap with the second mating thread 44. When the misalignment teeth 341 are in the locking position, they are misaligned with the second mating thread 44. One end of the misalignment piece 34 away from the sealing rubber ring 41 is provided with a pressing block 33. The pressing block 33 is rotatably connected to the lock cylinder 32. The outside of the pressing block 33 is connected with a lock rod 31. The pressing block 33 is provided with a convex block for pressing and moving the misalignment piece 34. The lock rod 31 is an L-shaped dial block.

[0038] In this embodiment, there are four extrusion brackets 432, and they are arranged in a circumferential array inside the sealing rubber ring 41.

[0039] In this embodiment, the extrusion bracket 432 is an arc structure, and the radian range of the extrusion bracket 432 is 30° - 45°.

[0040] In this embodiment, the expansion bracket 434 is provided with slots for releasing stress, so that it can contract when being squeezed by the water pipe 1 and the outer fixing pipe 2, and can expand when being supported by the support bracket 433.

[0041] In this embodiment, the guiding block 5 is an arc-shaped piece, and the guiding block 5 is integrally formed on the sealing rubber ring 41.

[0042] In this embodiment, the height of the guiding block 5 at the water inlet end is lower than the height of the guiding block 5 at the water outlet end.

[0043] In this embodiment, the misaligned piece 34 is an arc-shaped piece, and when being squeezed by the squeezing block 33, the arc-shaped structure is used to avoid bending. The radian range of the misaligned piece 34 is 10° - 20°.

[0044] The working principle is as follows. When it is necessary to fit two water pipes 1, first insert one end of the outer fixing pipe 2 into one side of the first water pipe 1. After the two water pipes 1 are aligned, then move the outer fixing pipe 2 to the central position between the two water pipes 1 as Figure 7 shown. At this time, since the sealing rubber ring 41 is not supported by the locking mechanism 3, the conical ring part of the sealing rubber ring 41 is squeezed into the gap between the water pipe 1 and the outer fixing pipe 2, and at the same time, the expansion bracket 434 is also squeezed and not expanded;

[0045] At this time, the lock rod 31 is in the open state as Figure 10 shown. Rotate the lock cylinder 32, and the second mating thread 44 on the lock cylinder 32 mates with the first mating thread 42 on the sealing rubber ring 41. The first mating thread 42 and the sealing rubber ring 41 will be squeezed and move inward until the expansion bracket 434 crosses the step between the water pipe 1 and the outer fixing pipe 2. At this time, the potential energy of the expansion bracket 434 is released, so as to support and expand the conical ring part of the sealing rubber ring 41 as Figure 7 shown. And because one of the extrusion bracket 432 and the support bracket 433 is an outward convex structure and the other is a cross structure, it can not only ensure the support effect between the central position of the sealing rubber ring 41 and the water pipe 1 and the outer fixing pipe 2, but also ensure the support of the support bracket 433 for the expansion bracket 434 and the conical ring part, ensuring sufficient support;

[0046] At this time, it is necessary to lock the first mating thread 42 and the second mating thread 44. Press the lock rod 31 to change the state of the lock rod 31 from Figure 10 to Figure 9The state is such that the locking lever 31 and the extrusion block 33 rotate. The convex block on the extrusion block 33 extrudes the dislocation piece 34, causing the convex block to extrude the dislocation piece 34 to move horizontally, so that the dislocation teeth 341 on the dislocation piece 34 are misaligned with the second mating thread 44, thereby engaging and locking the first mating thread 42 to avoid loosening. After the locking lever 31 is buckled, several turns of tape are wound around the outside to prevent the locking lever 31 from loosening and further ensure locking.

[0047] After water flows inside, the water flow at the water inlet end is initially stabilized through the guidance of the guide block 5, and the guide block 5 at the water outlet end conducts guidance again, thereby avoiding the formation of resistance and vortices by the high-pressure water flow at the step. At the same time, even if a water hammer phenomenon occurs, it can be supported by the extrusion support 432 and the support support 433.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A plastic pipe high-pressure quick connector, characterized in that: The invention comprises an external fixed tube (2) for providing external support, an internal connection mechanism (4) for cooperating and sealing an internal water pipe (1), and a locking mechanism (3) for preventing loosening and locking the internal connection mechanism (4), wherein the two ends of the inner side of the external fixed tube (2) correspond to two sections of water pipe (1) respectively, the internal connection mechanism (4) is installed on the inner side of the external fixed tube (2) at the opening position of the water pipe (1), the locking mechanism (3) is located on the outer side of the internal connection mechanism (4), and a conical ring portion of a sealing rubber ring (41) on the inner connection mechanism (4) is provided at a stepped position between the inner side of the external fixed tube (2) and the opening of the water pipe (1), and the inner side surface of the conical ring portion is provided with a circular array. A plurality of guide blocks (5) are arranged; an inner support assembly (43) is arranged inside the sealing rubber ring (41); the inner support assembly (43) is used to support the conical ring portion of the sealing rubber ring (41); when the inner support assembly (43) supports the conical ring portion of the sealing rubber ring (41), the step at the matching position of the water pipe (1) and the external fixed pipe (2) is filled, thereby reducing the vortex caused by the step and avoiding subsequent vibration and loosening caused by the vortex; one side of the sealing rubber ring (41) cooperates with the locking mechanism (3) through a telescopic assembly; the locking mechanism (3) is used to provide preliminary position adjustment and support for the sealing rubber ring (41); and The locking assembly on the locking mechanism (3) is used to prevent the telescopic assembly from loosening; the inner support assembly (43) comprises a stress-bearing sheet (431), an extrusion bracket (432), a support bracket (433), and an expansion bracket (434); the stress-bearing sheet (431), the extrusion bracket (432), the support bracket (433), and the expansion bracket (434) are integrally formed; the stress-bearing sheet (431) is a circular thin sheet used to transmit the extrusion force from left to right provided by the locking mechanism (3) as a preliminary adjustment support; the stress-bearing sheet (431) transmits the extrusion force to the extrusion bracket (432); the extrusion bracket (432) is two outwardly convex arc-shaped sheets The expansion bracket (434) is composed of a plurality of expansion brackets (434) and a plurality of expansion brackets (434). ...The telescopic assembly comprises a first mating thread (42) arranged on the sealing rubber ring (41), and a second mating thread (44) correspondingly arranged on the lock cylinder (32) of the locking mechanism (3), wherein the first mating thread (42) and the second mating thread (44) are mated. ; 2. A plastic pipe high-voltage quick connector according to claim 1, characterized in that: The locking assembly of the locking mechanism (3) comprises a dislocation piece (34), the dislocation piece (34) is axially slidably connected inside the lock cylinder (32), two dislocation pieces (34) are symmetrically arranged inside the lock cylinder (32), the inner side surface of the dislocation piece (34) is provided with dislocation teeth (341), an extrusion block (33) is provided at one end of the dislocation piece (34) away from the sealing rubber ring (41), the extrusion block (33) is rotatably connected to the lock cylinder (32), the extrusion block (33) is externally connected to a locking rod (31), the extrusion block (33) is provided with a protrusion for squeezing the dislocation piece (34) to move, and the locking rod (31) is an L-shaped shift block.

3. A plastic pipe high-pressure quick connector according to claim 1, characterized in that: Four extrusion brackets (432) are provided, and are arranged in a circular array inside the sealing rubber ring (41).

4. A plastic pipe high-pressure quick connector according to claim 3, characterized in that: The extrusion bracket (432) is an arc structure, and the arc range of the extrusion bracket (432) is 30° to 45°.

5. The plastic pipe high-pressure quick connector according to claim 1, characterized in that: The expansion bracket (434) is provided with a stress-relieving slot, which is used to enable the expansion bracket (434) to contract when it is squeezed by the water pipe (1) and the external fixing pipe (2), and to expand when it is supported by the supporting bracket (433).

6. A plastic pipe high-pressure quick connector according to claim 1, characterized in that: The guide block (5) is an arc-shaped piece, and the guide block (5) is integrally formed with the sealing rubber ring (41).

7. A plastic pipe high-pressure quick connector according to claim 6, characterized in that: The height of the guide block (5) at the water inlet end is lower than the height of the guide block (5) at the water outlet end.

8. A plastic pipe high-pressure quick connector according to claim 2, characterized in that: The dislocation piece (34) is an arc-shaped piece, and when being squeezed by the squeezing block (33), the arc-shaped structure is used to avoid bending, and the arc range of the dislocation piece (34) is 10° to 20°.

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