A leak-proof pipe clamping structure and sealing ring

Abstract

The present application discloses a leak-proof pipe clamping structure and a sealing ring, relating to the technical field of pipeline water supply systems. The pipe clamping structure includes an inner pipe, an outer pipe, and a sealing ring. The outer pipe is sleeved around the outer circumference of the inner pipe, and the inner circumferential wall of the outer pipe is provided with an annular groove. The outer pipe has an annular bulge at a position corresponding to the annular groove. The sealing ring is sleeved around the outer wall of the inner pipe and located within the annular groove. The sealing ring includes a sealing ring body, which is adapted to fit the inner wall opposite the annular groove and form an annular guide cavity between the bottom of the annular groove. One axial end of the sealing ring body is provided with a first guide groove, which is adapted to connect the gap between the inner pipe and the outer pipe on the corresponding side with the annular guide cavity. The other axial end of the sealing ring body is provided with a second guide groove, which is adapted to connect the gap between the inner pipe and the outer pipe on the corresponding side with the annular guide cavity. When the pipe clamping structure is not subjected to the test, a water leakage function is achieved during testing, which facilitates the detection of whether the pipe clamping has been performed, reduces the laminating process, and makes actual implementation more convenient.

Description

Technical Field

[0001] The present application relates to the field of pipeline water supply systems, and more specifically, to a leak-proof pipe clamping structure and a sealing ring. Background Art

[0002] In civil pipe water supply systems, copper compression fittings are now becoming popular due to their advantages of easy installation, time saving, safety and easy maintenance.

[0003] During installation, other copper compression fittings may appear leak-proof during testing, but leak during later use, resulting in significant economic losses, due to minimal differences in appearance before and after compression. Existing leak prevention measures include covering the outer bulge of the groove with a colored film. Damage to the film after compression is used to determine if compression has occurred.

[0004] However, the solution of coating with colored film requires an additional coating process, which makes the actual implementation more complicated and needs to be improved. Summary of the Invention

[0005] In order to improve the cumbersome implementation caused by covering with a colored film, the present application provides a leak-proof pipe clamping structure and a sealing ring.

[0006] The present application provides a leak-proof pipe clamping structure and a sealing ring, which adopts the following technical solutions:

[0007] A sealing ring of a leak-proof pipe clamping structure, the pipe clamping structure includes an inner tube, an outer tube and a sealing ring, the outer tube is sleeved on the outer circumference of the inner tube, the inner circumferential wall of the outer tube is provided with an annular groove, and the outer tube is provided with an annular bulge at the corresponding annular groove, the sealing ring is used to be sleeved on the outer wall of the inner tube and located in the annular groove, the sealing ring includes a sealing ring body, the sealing ring body is used to fit the inner walls opposite to the annular groove and form an annular guide cavity between the annular groove bottom, one end of the sealing ring body along the axial direction is provided with a first guide groove, the first guide groove is used to connect the gap between the corresponding side inner tube and outer tube and the annular guide cavity; the other end of the sealing ring body along the axial direction is provided with a second guide groove, the second guide groove is used to connect the gap between the corresponding side inner tube and outer tube and the annular guide cavity.

[0008] Through the above technical solution, when the annular bulge is not compressed, the gaps at both ends of the sealing ring are connected by the first guide groove, the second guide groove, and the annular guide cavity, thereby achieving water leakage during testing. When the annular bulge of the outer tube is clamped with a caliper to compress it, the annular groove is compressed against the sealing ring to ensure the sealing effect, thus achieving a seal. The provision of the first and second guide grooves allows the sealing ring to be integrally formed, facilitating detection of compression, reducing the lamination process, and making actual implementation more convenient.

[0009] Optionally, the projections of the first guide groove and the second guide groove along the axial direction do not overlap.

[0010] Through the above technical solution, the sealing ring body will be deformed after the annular bulge is clamped and compressed. By arranging the first guide groove and the second guide groove so that their axial projections do not overlap, the possibility of the first guide groove and the second guide groove being connected after deformation is reduced, making the actual use more stable.

[0011] Optionally, a plurality of the first guide grooves are evenly distributed around the axis, the number of the second guide grooves is the same as the number of the first guide grooves, and the central angles formed by each of the first guide grooves and its corresponding adjacent second guide groove are equal.

[0012] Through the above technical solution, the first guide groove and the second guide groove are evenly distributed around the axis of the sealing ring body, which makes the liquid flow effect better when not clamped, makes the anti-leakage card detection more accurate, and can also form a seal after the annular bulge is compressed, reducing the leakage of liquid after the annular bulge is clamped and compressed.

[0013] Optionally, the cross-section of the sealing ring body is elliptical, and the major axis direction of the ellipse is parallel to the axial direction of the sealing ring body.

[0014] Through the above technical solution, the long axis direction is parallel to the axis of the sealing ring body, so that the axial span of the sealing ring is larger. At this time, when the annular bulge is clamped and compressed, the fitting surface between the inner wall of the annular groove and the sealing ring body is larger, so that the sealing effect after connection is better.

[0015] Optionally, the inner peripheral wall of the sealing ring body is provided with a first cylindrical surface, and the first cylindrical surface is used to fit the outer wall of the inner tube.

[0016] Through the above technical solution, the first cylindrical surface is fitted to the outer wall of the inner tube, so that the fitting surface between the sealing ring body and the outer peripheral wall of the inner tube is larger, thereby achieving a better sealing effect.

[0017] Optionally, the outer peripheral wall of the sealing ring body is provided with a notch to form a second cylindrical surface.

[0018] Through the above technical solution, a second cylindrical surface is formed by the notch, so that the space of the annular guide cavity is larger, thereby achieving a better guide effect and making the anti-leakage card detection more accurate.

[0019] Optionally, the first guide groove and the second guide groove are both arc grooves, the axes of the arc grooves are perpendicular to the axis of the sealing ring body, and the arc grooves extend to the first cylindrical surface and the second cylindrical surface in a one-to-one correspondence around both ends of the axes.

[0020] Through the above technical solution, the first cylindrical surface and the second cylindrical surface of the conducting tower at both ends of the arc groove are connected, so that the liquid guiding effect of the first guide groove and the second guide groove is more stable, thereby making the anti-leakage card detection more accurate.

[0021] Optionally, the depth of each of the arc grooves gradually becomes shallower from the middle to both ends along the radial direction of the sealing ring body.

[0022] Through the above technical solution, the transition becomes gradually shallower, and the extrusion deformation of the sealing ring is more regular, thereby making the sealing effect more stable after the annular bulge is clamped and compressed.

[0023] Optionally, the depth of the arc groove is less than or equal to 5% of the axial thickness of the sealing ring body.

[0024] Through the above technical solution, the arc groove can easily affect the structural strength of the sealing ring body, making the overall use more stable.

[0025] The present application also provides a leak-proof pipe clamping structure, comprising a sealing ring of any of the above-mentioned leak-proof pipe clamping structures.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] (1) By setting the first guide groove and the second guide groove, a water leakage function is realized in the test when no pressing is performed; when the annular bulge is compressed by pressing, the annular groove is pressed tightly against the sealing ring to ensure the sealing effect, thereby achieving sealing; it is convenient to detect whether the pressing has been performed, reducing the laminating process, and making actual implementation more convenient.

[0028] (2) The first guide groove and the second guide groove are evenly distributed around the axis of the sealing ring body, so that the liquid flow effect is better when it is not clamped, making the anti-leakage card detection more accurate, and a seal can be formed after the annular bulge is compressed, reducing the leakage of the annular bulge after it is clamped and compressed;

[0029] (3) The first cylindrical surface makes the sealing ring body fit better with the inner tube, and the second cylindrical surface makes the annular guide cavity have a better guide effect, making the anti-leak card detection more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a cross-sectional schematic diagram of the embodiment in an unpressed state;

[0031] Figure 2 for Figure 1 A magnified schematic diagram of the middle part A;

[0032] Figure 3 Schematic diagram of the sealing ring structure of the embodiment;

[0033] Figure 4 It is a cross-sectional schematic diagram of the embodiment in a clamping state.

[0034] Figure numerals: 1, inner tube; 2, outer tube; 3, sealing ring body; 4, annular groove; 5, annular bulge; 6, first cylindrical surface; 7, second cylindrical surface; 8, arc groove; 81, first guide groove; 82, second guide groove; 9, annular guide cavity. DETAILED DESCRIPTION

[0035] The present application is further described in detail below with reference to the accompanying drawings.

[0036] The embodiment of the present application discloses a leak-proof pipe clamping structure, see Figure 1 and Figure 2 , including an inner tube 1, an outer tube 2 and a sealing ring. The inner tube 1 is in the shape of a circular tube, and the outer tube 2 is a copper tube or a stainless steel tube. The outer tube 2 is sleeved on the outer periphery of the inner tube 1 and is loosely fitted with the inner tube 1. An annular groove 4 is provided on the inner circumferential wall of the outer tube 2. The annular groove 4 is gradually tapered from the groove opening to the groove bottom. The cross-section of the groove bottom of the annular groove 4 is in the shape of an arc. The groove opening of the annular groove 4 is in the shape of an arc transition to the inner wall of the outer appearance. An annular bulge 5 is formed on the outer tube 2 corresponding to the annular groove 4. The sealing ring is sleeved on the outer wall of the inner tube 1 and is located in the annular groove 4. The sealing ring is an O-ring and is made of rubber. The sealing ring includes a sealing ring body 3. The sealing ring body 3 fits the relative inner wall of the annular groove 4 along the axial distribution of the sealing ring and forms an annular guide cavity 9 with the bottom of the annular groove 4.

[0037] See also Figure 2 and Figure 3 The cross-section of the sealing ring body 3 is elliptical, with the major axis of the ellipse parallel to the axis of the sealing ring body 3. A first cylindrical surface 6 is formed on the inner circumferential wall of the sealing ring body 3. The axis of the first cylindrical surface 6 coincides with the axis of the sealing ring body 3, and the first cylindrical surface 6 is in contact with the outer wall of the inner tube 1. A notch is provided on the outer circumferential wall of the sealing ring body 3 to form a second cylindrical surface 7. The axis of the second cylindrical surface 7 coincides with the axis of the sealing ring body 3. The formation of the second cylindrical surface 7 by the notch increases the space of the annular diversion cavity 9, thereby improving the diversion effect of the annular diversion cavity 9.

[0038] See also Figure 2 and Figure 3, arc grooves 8 are provided at both ends of the sealing ring body 3 along the axial direction, and the axes of the arc grooves 8 are perpendicular to the axis of the sealing ring body 3. The arc grooves 8 extend one-to-one around the two ends of their axes to the first cylindrical surface 6 and the second cylindrical surface 7. The groove depth of each arc groove 8 gradually becomes shallower from the middle to the two ends along the radial direction of the sealing ring body 3, and the groove depth of the arc groove 8 is less than the axial height of the first cylindrical surface 6 and the second cylindrical surface 7. The maximum groove depth of each arc groove 8 is less than or equal to 5% of the axial thickness of the sealing ring body 3. In this example, the maximum groove depth of the arc groove 8 is 0.2mm, the axial height of the first cylindrical surface 6 and the second cylindrical surface 7 are both 0.4mm, and the axial thickness of the sealing ring body 3 is 4.3mm.

[0039] Among the circular arc grooves 8, the first guide groove 81 is located at one axial end of the sealing ring body 3. The first guide groove 81 connects the gap between the corresponding inner tube 1 and outer tube 2 with the annular guide cavity 9. The first guide groove 81 is located at the other axial end of the sealing ring body 3, and the second guide groove 82 connects the gap between the corresponding inner tube 1 and outer tube 2 with the annular guide cavity 9. The axial projections of the first and second guide grooves 81, 82 along the sealing ring body 3 do not overlap. Multiple first guide grooves 81 are evenly distributed around the axis, and the number of second guide grooves 82 is the same as the number of first guide grooves 81. The central angle formed by each first guide groove 81 and its corresponding adjacent second guide groove 82 is equal, resulting in a staggered and evenly distributed first and second guide grooves 81, 82.

[0040] The first guide groove 81, the second guide groove 82, and the annular guide cavity 9 allow the gaps at both ends of the sealing ring to be connected. When the annular bulge 5 is not clamped, a water leakage function is achieved during testing, making it easy to detect whether it has been clamped. When the annular bulge 5 of the outer tube 2 is clamped with a caliper to compress it, the annular groove 4 is compressed and pressed against the sealing ring to ensure a sealing effect, thereby achieving a seal.

[0041] The working principle of this embodiment is:

[0042] See also Figure 1 and Figure 4 When using the aforementioned leak-proof clamping structure, when the annular bulge 5 is not compressed, the first guide groove 81, the second guide groove 82, and the annular guide cavity 9 connect the gaps at both ends of the sealing ring axially, thereby achieving a leak-proof function during testing. When the annular bulge 5 of the outer tube 2 is clamped with a caliper to compress it, the annular guide cavity 9 disappears after the compression of the annular groove 4. The bottom of the annular groove 4 is tightly against the sealing ring body 3 to ensure a good seal, achieving a leak-proof test. This facilitates the detection of compression, making testing more accurate and convenient during actual installation.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A sealing ring of a leak-proof pipe clamping structure, the pipe clamping structure comprising an inner pipe (1), an outer pipe (2) and a sealing ring, the outer pipe (2) being sleeved on the outer periphery of the inner pipe (1), an annular groove (4) being provided on the inner peripheral wall of the outer pipe (2), an annular bulge (5) being provided on the outer pipe (2) corresponding to the annular groove (4), the sealing ring being sleeved on the outer wall of the inner pipe (1) and being located in the annular groove (4), characterized in that: The sealing ring comprises a sealing ring body (3), the sealing ring body (3) being used to fit the inner wall opposite to the annular groove (4) and forming an annular guide cavity (9) between the sealing ring body (3) and the bottom of the annular groove (4), a first guide groove (81) being provided at one axial end of the sealing ring body (3), the first guide groove (81) being used to connect the gap between the corresponding inner tube (1) and the outer tube (2) with the annular guide cavity (9); a second guide groove (82) being provided at the other axial end of the sealing ring body (3), the second guide groove (82) being used to connect the gap between the corresponding inner tube (1) and the outer tube (2) with the annular guide cavity (9); and the projections of the first guide groove (81) and the second guide groove (82) along the axial direction do not overlap.

2. The sealing ring of the leak-proof pipe clamping structure according to claim 1, characterized in that: A plurality of the first guide grooves (81) are evenly distributed around the axis, the number of the second guide grooves (82) is the same as the number of the first guide grooves (81), and the central angles formed by each of the first guide grooves (81) and the corresponding adjacent second guide grooves (82) are equal.

3. The sealing ring of the leak-proof pipe clamping structure according to claim 1, characterized in that: The cross section of the sealing ring body (3) is elliptical, and the major axis direction of the ellipse is parallel to the axial direction of the sealing ring body (3).

4. The sealing ring of the leak-proof pipe clamping structure according to claim 3, characterized in that: The inner peripheral wall of the sealing ring body (3) is provided with a first cylindrical surface (6), and the first cylindrical surface (6) is used to fit the outer wall of the inner tube (1).

5. The sealing ring of the leak-proof pipe clamping structure according to claim 4, characterized in that: The outer peripheral wall of the sealing ring body (3) is provided with a notch to form a second cylindrical surface (7).

6. The sealing ring of the leak-proof pipe clamping structure according to claim 5, characterized in that: The first guide groove (81) and the second guide groove (82) are both arc grooves (8), the axes of the arc grooves (8) are perpendicular to the axis of the sealing ring body (3), and the arc grooves (8) extend to the first cylindrical surface (6) and the second cylindrical surface (7) in a one-to-one correspondence around the two ends of the axis.

7. The sealing ring of the leak-proof pipe clamping structure according to claim 6, characterized in that: The depth of each circular arc groove (8) gradually becomes shallower from the middle to both ends along the radial direction of the sealing ring body (3).

8. The sealing ring of the leak-proof pipe clamping structure according to claim 6, characterized in that: The depth of the circular arc groove (8) is less than or equal to 5% of the thickness of the sealing ring body (3) along the axial direction.

9. A leak-proof pipe clamping structure, comprising the sealing ring of any one of claims 1 to 8.

Images