A two-way sealing quick-connect pipe fitting and a two-way elastic sealing ring

Abstract

The present invention discloses a bidirectional sealing quick-connect pipe fitting and a bidirectional elastic sealing ring, comprising a connecting port for the connecting pipe fitting, a gasket, a pipe clamp, and a locking cap, wherein the gasket, pipe clamp, and locking cap are all sleeved on a water pipe; the gasket is characterized in that a bidirectional elastic sealing ring is sleeved on the water pipe in front of the gasket, and a complex positioning clamp is sleeved on the water pipe between the gasket and the pipe clamp; the connecting port cavity of the connecting pipe fitting is provided with a pipe fitting inner cavity, a high-pressure sealing surface, and a low-pressure sealing conical inclined surface in sequence from the inside to the outside; the bidirectional elastic sealing ring is integrally formed by a conical ring body and a "V"-shaped ring groove; the complex positioning clamp is provided with an extrusion block, and the outer wall of the extrusion block is provided with an extrusion inclined surface; the pipe clamp is arranged in the pipe clamp installation cavity of the locking cap. The present invention uses a bidirectional elastic sealing ring for sealing, which is convenient and quick to install, saving time and effort; and during the installation process, the deformed pipe head can automatically return to a round shape.

Description

Technical Field

[0001] The present invention relates to an improvement of a connecting pipe fitting for a water supply pipe, specifically a bidirectional sealing quick connecting pipe fitting and a bidirectional elastic sealing ring. During the process of connecting the connecting pipe fitting and the water pipe, the deformed pipe head can automatically restore to a circular shape to ensure the reliability of the seal. Background Art

[0002] At present, in the actual operation process of the water supply network, the water pressure in the water pipe is not constant. Sometimes it is in a low water pressure operation state, and sometimes it is in a high water pressure operation state. Especially in the farmland irrigation network, the pump will be turned on only when irrigation is needed, resulting in frequent alternation of high and low pressure. This places high demands on the sealing of the connecting pipes. The connecting pipes of PE, PP, and PPR water supply pipes used on the market, such as straight pipes, elbows, tees, plugs, internal threads, and external threads, need to be quickly installed and tightly sealed when the connecting ports of these connecting pipes are connected to the water pipes. Such connecting pipes include the connecting ports of the connecting pipes and the locking caps, pipe clamps, gaskets, and sealing rings mounted on the water pipes. There are generally two types of sealing rings: one is an O-shaped sealing ring, and the other is a triangular sealing ring. 1. For the connecting pipe fittings that use O-rings for sealing, the O-ring is squeezed between the inner wall of the connecting port of the connecting pipe fitting and the outer wall of the pipe head. The distance between the inner diameter of the connecting port of the connecting pipe fitting and the outer diameter of the water pipe should be as small as possible to ensure the sealing effect. During installation, first put the locking cap, pipe clamp, gasket and O-ring on the water pipe, then insert the water pipe head into the connecting port cavity of the connecting pipe fitting, and the outer wall of the connecting port of the connecting pipe fitting is connected to the locking cap through a thread. During the process of rotating the locking cap and the connecting port of the connecting pipe fitting, the pipe wall is locked by the pipe clamp and the O-ring is pressed forward against the gasket. The disadvantage is that: During transportation and storage, the pipe head is easily deformed. Since the distance between the inner wall of the connecting port of the connecting pipe fitting and the outer wall of the water pipe is small, the deformed pipe head is difficult to insert into the connecting port of the connecting pipe fitting, resulting in installation difficulties, high labor intensity, time-consuming and labor-intensive, and reduced installation efficiency; in addition, the gap between the outer wall of the deformed pipe head and the inner wall of the connecting port of the connecting pipe fitting is also uneven, which will cause uneven deformation of the O-ring and easily cause water leakage; during the water supply process, after the water pressure increases, the water pipe will move outward relative to the connecting port of the connecting pipe fitting, driving the pipe clamp to move slightly outward, resulting in a decrease in the clamping force of the pipe clamp on the O-ring, which will also cause water leakage.2. For the connecting pipe fittings that use triangular sealing rings for sealing, the inner diameter of the connecting port of the connecting pipe fitting is adapted to the outer diameter of the water pipe, and a sealing conical inclined surface is provided at the outer end of the connecting port of the connecting pipe fitting, and the triangular sealing ring is adapted to the sealing conical inclined surface; during installation, first put a locking cap, pipe clamp, gasket and triangular sealing ring on the water pipe, and then insert the water pipe head into the connecting port of the connecting pipe fitting, and the triangular sealing ring is located between the sealing conical inclined surface at the outer end of the connecting port of the connecting pipe fitting and the outer wall of the pipe head. The outer wall of the connecting port of the connecting pipe fitting is connected to the locking cap through a threaded connection. During the process of rotating the locking cap and the connecting port of the connecting pipe fitting, the water pipe wall is locked by the pipe clamp, and the triangular sealing ring is pressed forward against the gasket, so that the triangular sealing ring is wedged between the sealing conical inclined surface of the connecting port of the connecting pipe fitting and the outer wall of the pipe head, and the more it is pressed, the tighter it becomes. , achieving the purpose of sealing; its disadvantage is that: due to the small distance between the inner wall of the connecting port of the connecting pipe fitting and the outer wall of the water pipe, it is difficult to insert the deformed pipe head into the connecting port of the connecting pipe fitting, resulting in installation difficulty; moreover, the gap between the sealing conical inclined surface of the connecting port of the connecting pipe fitting and the outer wall of the deformed pipe head is also uneven. When the triangular sealing ring is wedged from the outside to the inside for sealing, the deformation of the triangular sealing ring is uneven. When the water pressure in the water pipe is at a low water pressure state, the sealing effect is better. When the water pressure in the water pipe is at a high water pressure state, water leakage is likely to occur; since the locking cap, pipe clamp and triangular sealing ring are in a linked state, during the water supply process, when the water pressure increases, the water pipe will move outward relative to the connecting port of the connecting pipe fitting, driving the pipe clamp to move slightly outward, resulting in less pressure of the pipe clamp on the triangular sealing ring, and the sealing failure will also occur. Summary of the Invention

[0003] One object of the present invention is to provide a bidirectional elastic sealing ring suitable for use in a connecting pipe fitting for a water supply pipe, which is installed in the space between the inner wall of the connecting port of the connecting pipe fitting and the outer wall of the water pipe head, and can achieve both compression sealing from the outside to the inside and expansion sealing from the inside to the outside, with a simple structure and easy installation.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: a bidirectional elastic sealing ring includes a conical ring body, the outer diameter of the lower end of which is larger than the outer diameter of the upper end, and the inner diameter of the conical ring body is adapted to the outer diameter of the water pipe; it is characterized in that: a "V"-shaped ring groove is fixedly provided at the upper end of the conical ring body, the opening of the "V"-shaped ring groove faces upward, the "V"-shaped ring groove coincides with the central axis of the conical ring body, and the middle part of the conical ring body and the "V"-shaped ring groove is the center hole of the sealing ring.

[0005] The V-shaped ring groove and the conical ring body of the bidirectional elastic sealing ring are integrally formed by injection molding of rubber or silicone material by an injection molding machine.

[0006] Another object of the present invention is to provide a bidirectional sealing quick-connect pipe fitting suitable for use in high-pressure and low-pressure water supply pipes, wherein the distance between the inner wall of the connecting port of the connecting pipe fitting and the outer wall of the water pipe head is large, which facilitates the insertion of the water pipe head into the connecting port of the connecting pipe fitting, and adopts a bidirectional elastic sealing ring for sealing, which is convenient and quick to install. At the same time, during the installation process, the deformed pipe head can automatically return to a round shape, and the bidirectional elastic sealing ring and the pipe clamp work independently to improve the sealing effect and installation efficiency.

[0007] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0008] This bidirectional sealing quick-connect pipe fitting includes a connecting port for the connecting pipe fitting, a gasket, a pipe clamp, and a locking cap. The gasket, pipe clamp, and locking cap are all sleeved on the water pipe, and the connecting port of the connecting pipe fitting is threadedly connected to the locking cap. It is characterized in that a bidirectional elastic sealing ring is sleeved on the water pipe in front of the gasket, and a complex positioning clamp is sleeved on the water pipe between the gasket and the pipe clamp.

[0009] The connection port cavity of the connecting pipe is provided with a pipe inner cavity, a high-pressure sealing surface and a low-pressure sealing conical inclined surface from the inside to the outside. The low-pressure sealing conical inclined surface is located at the edge of the connection port of the connecting pipe. The outer wall of the connection port of the connecting pipe is provided with an external thread. The inner diameter of the high-pressure sealing surface is the same as the outer diameter of the "V"-shaped ring groove of the bidirectional elastic sealing ring when in a free state.

[0010] The bidirectional elastic sealing ring is composed of a conical ring body and a "V"-shaped ring groove fixed as a whole. The lower end of the "V"-shaped ring groove is connected to the upper end of the conical ring body. The central axis of the "V"-shaped ring groove coincides with the central axis of the conical ring body. The middle of the conical ring body and the "V"-shaped ring groove is the center hole of the sealing ring. The center hole of the sealing ring is adapted to the outer diameter of the water pipe. The opening of the "V"-shaped ring groove faces the inner cavity of the pipe. The "V"-shaped ring groove is located between the inner wall of the high-pressure sealing surface and the outer wall of the water pipe, and the conical ring body is located between the inner wall of the low-pressure sealing conical inclined surface and the outer wall of the water pipe.

[0011] The middle part of the compound positioning clamp is provided with a clamp center hole, which is adapted to the outer diameter of the water pipe. A clamp opening is provided on the circumference of the compound positioning clamp. Extrusion blocks are evenly distributed on the front side panel of the compound positioning clamp. The front end of the extrusion block is pressed against the gasket. The outer side wall of the front end of the extrusion block is provided with an extrusion inclined surface adapted to the low-pressure sealing conical inclined surface of the connecting port of the connecting pipe.

[0012] The pipe clamp is provided with a pipe clamp opening on its circumference, a pipe clamp center hole is provided in the middle of the pipe clamp, wedge-shaped blocks are evenly distributed along the circumference on the outer wall of the pipe clamp, and an anti-slip convex ring is provided on the inner wall of the pipe clamp center hole of the pipe clamp to match the outer wall of the water pipe;

[0013] The lock cap is provided with a lock cap center hole in the middle part, and an internal thread that is compatible with the external thread on the connecting port of the connecting pipe fitting is provided on the front inner wall of the lock cap center hole, and a clamp limiting boss that is compatible with the complex positioning clamp is provided in the middle part of the lock cap center hole. The rear part of the lock cap center hole is a pipe clamp installation cavity, and the pipe clamp is arranged in the pipe clamp installation cavity. The rear end part of the pipe clamp installation cavity is provided with a pipe clamp locking conical surface, and the inner wall of the pipe clamp locking conical surface is compatible with the wedge block on the outer wall of the pipe clamp.

[0014] The inner diameter of the inner cavity of the connecting pipe at the connecting port of the connecting pipe is the same as the outer diameter of the water pipe.

[0015] The central hole in the middle of the gasket is adapted to the outer diameter of the water pipe. The outer diameter of the gasket is larger than the inner diameter of the high-pressure sealing surface. The outer edge of the gasket is located inside the front end plane of the extrusion block of the complex positioning clamp.

[0016] The rear side panel of the complex positioning clamp is provided with a weight-reducing groove corresponding to the extrusion block.

[0017] The outer wall of the lock cap is provided with anti-sliding blocks evenly distributed along the circumference.

[0018] The beneficial effects of the present invention are: compared with the current water supply pipe connecting fittings, the present invention is suitable for use on water supply pipes with high water pressure and low water pressure, especially farmland irrigation water supply pipes with large water pressure changes. The distance between the inner wall of the connecting port of the connecting fitting and the outer wall of the water pipe head is large, which is convenient for the water pipe head to be inserted into the connecting port of the connecting fitting, and a two-way elastic sealing ring is used for sealing. The installation is convenient and quick, saving time and effort, improving installation efficiency and reducing labor intensity; at the same time, during the installation process, the deformed pipe head can automatically restore to a round shape and be positioned at the center position of the connecting port of the connecting fitting, thereby improving the sealing effect of the connecting fitting and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial cross-sectional schematic diagram of the installation structure of the present invention;

[0020] Figure 2 It is a schematic cross-sectional view of the structure of the connection port of the connecting pipe of the present invention;

[0021] Figure 3 It is a schematic cross-sectional view of the structure of the lock cap of the present invention;

[0022] Figure 4 It is a schematic top view of the structure of the lock cap of the present invention;

[0023] Figure 5 It is a schematic cross-sectional view of the structure of the bidirectional elastic sealing ring of the present invention;

[0024] Figure 6It is a schematic top view of the structure of the bidirectional elastic sealing ring of the present invention;

[0025] Figure 7 It is a schematic top view of the structure of the gasket of the present invention;

[0026] Figure 8 It is a schematic cross-sectional view of the structure of the gasket of the present invention;

[0027] Figure 9 It is a bottom view schematic diagram of the structure of the complex positioning clamp ring of the present invention;

[0028] Figure 10 It is a front view schematic diagram of the structure of the complex positioning clamp ring of the present invention;

[0029] Figure 11 It is a schematic top view of the structure of the complex positioning clamp ring of the present invention;

[0030] Figure 12 It is a front view schematic diagram of the structure of the pipe clamp of the present invention;

[0031] Figure 13 It is a schematic top view of the structure of the pipe clamp of the present invention;

[0032] Figure 14 For the present invention Figure 13 Schematic diagram of the cross-section of the pipe clamp in the A-A direction.

[0033] In the figure: 1. Connection port for connecting pipe fittings; 11. External thread; 12. High-pressure sealing surface; 13. Low-pressure sealing conical inclined surface; 14. Inner cavity of pipe fitting; 2. Bidirectional elastic sealing ring; 21. Center hole of sealing ring; 22. "V"-shaped ring groove; 23. Conical ring body; 3. Gasket; 31. Center hole of gasket; 4. Complex positioning clamp; 41. Center hole of clamp; 42. Opening of clamp; 43. Extrusion block; 44. Weight-reducing groove; 45. Extrusion inclined surface; 5. Pipe clamp; 51. Center hole of pipe clamp; 52. Opening of pipe clamp; 53. Wedge block; 54. Anti-slip raised ring; 6. Locking cap; 61. Anti-sliding block; 62. Pipe clamp mounting cavity; 63. Center hole of locking cap; 64. Internal thread; 65. Limiting boss of clamp; 66. Pipe clamp locking conical surface; 7. Water pipe. DETAILED DESCRIPTION

[0034] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 Make the present invention.

[0035] The connecting pipes described in the present invention are straight, elbow, tee, plug, inner thread or outer thread made of PP material, and the position where they are connected to the water pipe is the connecting port 1 of the connecting pipe. Figure 2 As shown, the water pipe 7 refers to a PE, PP or PPR water pipe. During transportation or storage, the pipe opening of such a water pipe may sometimes be deformed to varying degrees, that is, it is not in the perfect circular state when it leaves the factory.

[0036] This is a bidirectional elastic sealing ring, such as Figure 5 、 Figure 6 As shown, it includes a tapered ring body 23, the outer diameter of the lower end of which is larger than the outer diameter of the upper end, and the inner diameter of the tapered ring body 23 is adapted to the outer diameter of the water pipe 7; it is characterized in that: the upper end of the tapered ring body 23 is fixedly provided with a "V"-shaped annular groove 22, the opening of the "V"-shaped annular groove 22 faces upward, the "V"-shaped annular groove 22 coincides with the central axis of the tapered ring body 23, and the middle of the tapered ring body 23 and the "V"-shaped annular groove 22 is the center hole 21 of the sealing ring. When in use, the center hole 21 of the sealing ring is sleeved on the outside of the pipe head of the water pipe 7, and then the pipe head of the water pipe 7 is inserted into the inner cavity 14 of the pipe fitting of the connecting port 1 of the connecting pipe fitting, the opening of the "V"-shaped annular groove 22 faces the inner cavity 14 of the pipe fitting, and the "V"-shaped annular groove 22 is positioned Between the inner wall of the high-pressure sealing surface 12 and the outer wall of the water pipe 7, the conical ring body 23 is located between the inner wall of the low-pressure sealing conical inclined surface 13 and the outer wall of the water pipe 7; after the connecting pipe is installed, the conical ring body 23 is tightly pressed against the inner wall of the low-pressure sealing conical inclined surface 13, forming a seal from the outside to the inside, which can meet the normal operation under low water pressure conditions in the water pipe 7; when high water pressure conditions are formed in the water pipe 7, the water pressure will form pressure on the two inner side walls of the "V"-shaped annular groove 22, causing the two inner side walls to move outward respectively, forming a seal from the inside to the outside between the inner wall of the high-pressure sealing surface 12 and the outer wall of the water pipe 7, ultimately achieving the purpose of two-way sealing and ensuring the reliability of the seal.

[0037] The V-shaped ring groove 22 and the conical ring body 23 of the bidirectional elastic sealing ring 2 are integrally formed by injection molding of rubber or silicone material using an injection molding machine.

[0038] This bidirectional sealing quick-connect pipe fitting includes a connecting port 1 for the connecting pipe fitting, a gasket 3, a pipe clamp 5, and a locking cap 6. The gasket 3, pipe clamp 5, and locking cap 6 are all sleeved on a water pipe 7, and the connecting port 1 of the connecting pipe fitting is threadedly connected to the locking cap 6. The characteristics are: a bidirectional elastic sealing ring 2 is sleeved on the water pipe 7 on the front side of the gasket 3, and a complex positioning clamp 4 is sleeved on the water pipe 7 between the gasket 3 and the pipe clamp 5.

[0039] The connection port 1 of the connecting pipe is provided with a pipe inner cavity 14, a high-pressure sealing surface 12 and a low-pressure sealing conical inclined surface 13 from the inside to the outside. The low-pressure sealing conical inclined surface 13 is located at the edge of the connection port 1 of the connecting pipe. The outer wall of the connection port 1 of the connecting pipe is provided with an external thread 11. The inner diameter of the high-pressure sealing surface 12 is the same as the outer diameter of the "V"-shaped ring groove 22 of the bidirectional elastic sealing ring 2 in the free state. In this way, the distance between the inner wall of the high-pressure sealing surface 12 and the outer wall of the water pipe 7 is large, which is conducive to the insertion of the water pipe 7 head and is not affected by the deformation of the water pipe 7 head.

[0040] The bidirectional elastic sealing ring 2 is composed of a conical ring body 23 and a "V"-shaped ring groove 22 fixed as a whole. The lower end of the "V"-shaped ring groove 22 is connected to the upper end of the conical ring body 23. The central axis of the "V"-shaped ring groove 22 coincides with the central axis of the conical ring body 23. The middle part of the conical ring body 23 and the "V"-shaped ring groove 22 is the sealing ring center hole 21. The sealing ring center hole 21 is adapted to the outer diameter of the water pipe 7. The opening of the "V"-shaped ring groove 22 faces the inner cavity 14 of the pipe fitting. The "V"-shaped ring groove 22 is located between the inner wall of the high-pressure sealing surface 12 and the outer wall of the water pipe 7, and the conical ring body 23 is located between the inner wall of the low-pressure sealing conical inclined surface 13 and the outer wall of the water pipe 7.

[0041] A center hole 41 is provided in the middle of the compound positioning snap ring 4, which is adapted to the outer diameter of the water pipe 7. A snap ring opening 42 is provided on the circumference of the compound positioning snap ring 4. By adjusting the size of the snap ring opening 42, the size of the center hole 41 can be changed. Extrusion blocks 43 are evenly distributed on the front side panel of the compound positioning snap ring 4. The front end of the extrusion block 43 is pressed against the gasket 3. The outer wall of the front end of the extrusion block 43 is provided with an extrusion slope 45 adapted to the low-pressure sealing conical slope 13 of the connecting port 1 of the connecting pipe fitting;

[0042] The pipe clamp 5 is provided with a pipe clamp opening 52 on its circumference, and a pipe clamp center hole 51 is provided in the middle of the pipe clamp 5. The size of the pipe clamp center hole 51 can be changed by adjusting the opening size of the pipe clamp opening 52. The outer wall of the pipe clamp 5 is provided with wedge-shaped blocks 53 evenly distributed along the circumference. The inner wall of the pipe clamp center hole 51 of the pipe clamp 5 is provided with an anti-slip convex ring 54 adapted to the outer wall of the water pipe 7 to increase the degree of firmness of the connection between the pipe clamp 5 and the water pipe 7.

[0043] The middle part of the locking cap 6 is provided with a locking cap center hole 63, and the front inner wall of the locking cap center hole 63 is provided with an internal thread 64 that matches the external thread 11 on the connecting port 1 of the connecting pipe fitting. The middle part of the locking cap center hole 63 is provided with a clamping ring limiting boss 65 that matches the complex positioning clamping ring 4, so that the bottom plate of the complex positioning clamping ring 4 can be seated on the clamping ring limiting boss 65, thereby pushing the complex positioning clamping ring 4 to move through the locking cap 6, and the rear part of the locking cap center hole 63 is a pipe clamp installation cavity 62, and the pipe clamp 5 is arranged in the pipe clamp installation cavity 62. The rear end part of the pipe clamp installation cavity 62 is provided with a pipe clamp locking conical surface 66, and the inner wall of the pipe clamp locking conical surface 66 is matched with the wedge block 53 on the outer wall of the pipe clamp 5; in this way, the pipe clamp 5 can move independently in the pipe clamp installation cavity 62 and is in contact with the complex positioning clamping ring 4 No contact transmission occurs. As the locking cap 6 is connected and fixed to the connecting port 1 of the connecting pipe fitting, the anti-slip convex ring 54 on the inner wall of the pipe clamp center hole 51 of the pipe clamp 5 is in close contact with the outer wall of the water pipe 7 to form a fixed connection. The pipe clamp 5 and the water pipe 7 are relatively fixed. The pipe clamp locking tapered surface 66 of the locking cap 6 cooperates with the wedge block 53 on the outer wall of the pipe clamp 5 to further enhance the degree of secure connection between the pipe clamp 5 and the water pipe 7. Even if the water pressure is high and the water pressure pushes the water pipe 7 back slightly, the only way to enhance the degree of secure connection between the pipe clamp 5 and the water pipe 7 is to cooperate with the pipe clamp locking tapered surface 66 and the wedge block 53 again without affecting the sealing condition of the bidirectional elastic sealing ring 2, thereby ensuring that the sealing effect is stable.

[0044] The inner diameter of the pipe cavity 14 of the connecting port 1 of the connecting pipe is the same as the outer diameter of the water pipe 7 .

[0045] The gasket center hole 31 in the middle of the gasket 3 is adapted to the outer diameter of the water pipe 7. The outer diameter of the gasket 3 is larger than the inner diameter of the high-pressure sealing surface 12. The outer edge of the gasket 3 is located on the inner side of the front end plane of the extrusion block 43 of the compound positioning clamp 4, so as not to affect the extrusion inclined surface 45 on the outer side wall of the front end of the extrusion block 43 to slide smoothly along the low-pressure sealing conical inclined surface 13 of the connecting port 1 of the connecting pipe fitting. The clamping ring opening 42 on the circumference of the compound positioning clamp 4 becomes smaller, and the clamping ring center hole 41 becomes smaller. The extrusion block 43 on the front side panel of the compound positioning clamp 4 continues to push the gasket 3 forward, so that the conical ring body 23 and the low-pressure sealing conical inclined surface 13 are more tightly combined.

[0046] A weight-reducing groove 44 corresponding to the extrusion block 43 is provided on the rear side panel of the complex positioning snap ring 4 to reduce the weight and manufacturing cost of the complex positioning snap ring 4.

[0047] The outer wall of the lock cap 6 is provided with anti-sliding blocks 61 evenly distributed along the circumference to facilitate quick installation.

[0048] The pipe clamp 5 is made of polyoxymethylene (POM) material; the complex positioning clamp ring 4 is made of polypropylene (PP) material; the gasket 3 is made of polyoxymethylene (POM) material; and the locking cap 6 is made of polypropylene (PP) material.

[0049] When installing the present invention, the locking cap 6, pipe clamp 5, complex positioning clamp ring 4, gasket 3 and bidirectional elastic sealing ring 2 are sequentially sleeved on the pipe head of the water pipe 7, and the pipe head of the water pipe 7 is inserted into the pipe inner cavity 14 of the connecting port 1 of the connecting pipe fitting. The "V"-shaped ring groove 22 of the bidirectional elastic sealing ring 2 is embedded in the high-pressure sealing surface 12, and the conical ring body 23 of the bidirectional elastic sealing ring 2 is fitted onto the low-pressure sealing conical inclined surface 13. The locking cap 6 is rotated to thread the connecting port 1 of the connecting pipe fitting into the locking cap 6. In the process of rotating the locking cap 6 to thread the connecting port 1 of the connecting pipe fitting, the bottom panel of the complex positioning clamp ring 4 is seated on the clamp ring limiting boss 65 of the locking cap 6, and the complex positioning is pushed by the locking cap 6. When the clamp ring 4 moves, the pipe clamp 5 enters the pipe clamp installation cavity 62 at the rear of the locking cap 6. The pipe clamp locking conical surface 66 of the locking cap 6 cooperates with the wedge block 53 on the outer wall of the pipe clamp 5, so that the pipe clamp 5 and the water pipe 7 are firmly fixed. When the locking cap 6 rotates and moves forward, the locking cap 6 pushes the compound positioning clamp ring 4 forward through the clamp ring limiting boss 65. The front end plane position of the extrusion block 43 of the compound positioning clamp ring 4 moves forward against the gasket 3. The gasket 3 will push the conical ring body 23 at the rear of the two-way elastic sealing ring 2 to press against the low-pressure sealing conical inclined surface 13, forming a seal from the outside to the inside. If the pipe head of the water pipe 7 is deformed, the two-way elastic sealing ring 2 will also be deformed. At this time, The contact force between the conical ring body 23 and the low-pressure sealing conical inclined surface 13 is uneven, which will reduce the sealing effect; continuing to rotate the lock cap 6 will continue to push the complex positioning clamp ring 4 forward. At this time, since the outer side wall of the front end of the extrusion block 43 is provided with an extrusion inclined surface 45 that matches the low-pressure sealing conical inclined surface 13 of the connecting port 1 of the connecting pipe fitting, the front end of the extrusion block 43 will be inserted into the cavity of the low-pressure sealing conical inclined surface 13, and the clamp ring opening 42 of the complex positioning clamp ring 4 will become smaller, and the clamp ring center hole 41 in the middle of the complex positioning clamp ring 4 will also become smaller, so that the clamp ring center hole 41 squeezes the deformed pipe head of the water pipe 7, causing it to gradually return to a circular shape, ensuring that the bidirectional elastic sealing ring 2 is in the circumference. The force is evenly distributed on the top, which ensures the sealing effect and prolongs its service life. After the conical ring body 23 at the rear of the bidirectional elastic sealing ring 2 is pressed against the low-pressure sealing conical inclined surface 13, the pipe head of the water pipe 7 is also corrected. At the same time, the pipe clamp locking conical surface 66 of the locking cap 6 will squeeze the pipe clamp 5 through the wedge-shaped block 53 on the outer wall of the pipe clamp 5. Since a pipe clamp opening 52 is provided on the circumference of the pipe clamp 5, after the pipe clamp 5 is squeezed, the pipe clamp opening 52 becomes smaller, and the pipe clamp center hole 51 becomes smaller, so that the anti-slip convex ring 54 on the inner wall of the pipe clamp center hole 51 is pressed into the outer wall surface of the water pipe 7, so that the pipe clamp 5 and the water pipe 7 are fixed and firmly connected to prevent the water pipe 7 from falling off. In this way, the installation process of the entire connecting pipe fitting is completed.

Claims

1. A two-way sealed quick-connect pipe fitting, comprising a connecting port (1) of the connecting pipe fitting, a gasket (3), a pipe clamp (5) and a locking cap (6), wherein the gasket (3), the pipe clamp (5) and the locking cap (6) are all sleeved on a water pipe (7), and the connecting port (1) of the connecting pipe fitting is threadedly connected to the locking cap (6); characterized in that: A bidirectional elastic sealing ring (2) is sleeved on the water pipe (7) in front of the gasket (3), and a complex positioning clamp (4) is sleeved on the water pipe (7) between the gasket (3) and the pipe clamp (5); The connection port (1) of the connecting pipe is provided with a pipe inner cavity (14), a high-pressure sealing surface (12) and a low-pressure sealing conical inclined surface (13) in sequence from the inside to the outside. The low-pressure sealing conical inclined surface (13) is located at the edge of the connection port (1) of the connecting pipe. An external thread (11) is provided on the outer wall of the connection port (1) of the connecting pipe. The inner diameter of the high-pressure sealing surface (12) is the same as the outer diameter of the "V"-shaped ring groove (22) of the bidirectional elastic sealing ring (2) in a free state. The bidirectional elastic sealing ring (2) is fixed as a whole by a conical ring body (23) and a "V"-shaped ring groove (22). The lower end of the "V"-shaped ring groove (22) is connected to the upper end of the conical ring body (23). The central axis of the "V"-shaped ring groove (22) and the conical ring body (23) coincide with each other. The middle of the conical ring body (23) and the "V"-shaped ring groove (22) is the sealing ring center hole (21). The sealing ring center hole (21) is connected to the water pipe. (7) is adapted to the outer diameter of the pipe, the opening of the "V"-shaped ring groove (22) faces the inner cavity of the pipe (14), the "V"-shaped ring groove (22) is located between the inner wall of the high-pressure sealing surface (12) and the outer wall of the water pipe (7), and the conical ring body (23) is located between the inner wall of the low-pressure sealing conical inclined surface (13) and the outer wall of the water pipe (7); the "V"-shaped ring groove (22) and the conical ring body (23) are made of rubber or silicone material by injection molding into one piece by an injection molding machine; The center of the compound positioning clamp (4) is provided with a clamp center hole (41), which is adapted to the outer diameter of the water pipe (7). A clamp opening (42) is provided on the circumference of the compound positioning clamp (4). Extrusion blocks (43) are evenly distributed on the front side panel of the compound positioning clamp (4). The front end of the extrusion block (43) is pressed against the gasket (3). The outer side wall of the front end of the extrusion block (43) is provided with an extrusion inclined surface (45) adapted to the low-pressure sealing conical inclined surface (13) of the connecting port (1) of the connecting pipe. The pipe clamp (5) is provided with a pipe clamp opening (52) on its circumference, a pipe clamp center hole (51) is provided in the middle of the pipe clamp (5), wedge-shaped blocks (53) are evenly distributed along the circumference on the outer wall of the pipe clamp (5), and an anti-slip convex ring (54) adapted to the outer wall of the water pipe (7) is provided on the inner wall of the pipe clamp center hole (51) of the pipe clamp (5); The locking cap (6) is provided with a locking cap center hole (63) in the middle, an internal thread (64) matching the external thread (11) on the connecting port (1) of the connecting pipe is provided on the front inner wall of the locking cap center hole (63), a clamping ring limiting boss (65) matching the complex positioning clamping ring (4) is provided in the middle of the locking cap center hole (63), the rear part of the locking cap center hole (63) is a pipe clamp installation cavity (62), the pipe clamp (5) is arranged in the pipe clamp installation cavity (62), and a pipe clamp locking conical surface (66) is provided at the rear end of the pipe clamp installation cavity (62), and the inner wall of the pipe clamp locking conical surface (66) matches the wedge block (53) on the outer wall of the pipe clamp (5).

2. The bidirectional sealing quick-connect pipe fitting according to claim 1, characterized in that: The inner diameter of the pipe fitting inner cavity (14) of the connecting port (1) of the connecting pipe fitting is the same as the outer diameter of the water pipe (7).

3. The bidirectional sealing quick-connect pipe fitting according to claim 1, characterized in that: The gasket center hole (31) in the middle of the gasket (3) is adapted to the outer diameter of the water pipe (7), the outer diameter of the gasket (3) is larger than the inner diameter of the high-pressure sealing surface (12), and the outer edge of the gasket (3) is located inside the front end plane of the extrusion block (43) of the complex positioning clamp (4).

4. The bidirectional sealing quick-connect pipe fitting according to claim 1, characterized in that: A weight-reducing groove (44) corresponding to the extrusion block (43) is provided on the rear side panel of the complex positioning clamp (4).

5. The bidirectional sealing quick-connect pipe fitting according to claim 1, characterized in that: The outer wall of the lock cap (6) is provided with anti-sliding blocks (61) evenly distributed along the circumference.

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