Sleeve joint structure capable of testing pipeline and sealing rubber ring

Abstract

The utility model provides a testable pipeline sleeve joint structure and a sealing rubber ring, and relates to the field of pipeline connection. The sealing rubber ring comprises a rubber ring body which extends in the circumferential direction of the sealing rubber ring; the sealing element has: a first inner contact surface provided with a first sealing lip and a second sealing lip; the first external connection surface is arranged on the back side of the first internal connection surface; the rubber ring body is further provided with a first pressure test through hole and a second pressure test through hole which penetrate through the first inner connecting face and the first outer connecting face. The testable pipeline sleeve joint structure comprises a sealing rubber ring; the sealing rubber ring is sleeved with the outer sleeve, and an outer sleeve body of the outer sleeve extends in the circumferential direction of the outer sleeve; the outer sleeve is provided with an outer through hole; and the pressure test pipe fitting is embedded in the first pressure test through hole and the outer through hole. The device can be used for pipeline connection and joint sealing detection at the same time, and is convenient and practical.

Description

Technical Field

[0001] The utility model relates to the field of pipeline connection, in particular to a testable pipeline sleeve joint structure and a sealing rubber ring. Background Art

[0002] The pipe sleeve joint is a fitting used for pipe connection, and it plays an important role in the pipe system. In the transportation systems of chemical, petroleum, natural gas, water supply and drainage engineering and other industries, sleeve joints are used to ensure the reliability and sealing of pipe connections. Pipe sleeve joints are usually equipped with sealing rings to ensure the sealing of the connection and prevent fluid leakage. The pipe sleeve joint has a simple structure, easy installation, and reliable sealing. However, it is difficult to detect internal leakage of the pipe sleeve joint due to loose rubber rings or failure at the pipe connection, which can easily cause long-term leakage or accident expansion. Commonly used visual, hand touch, soapy water detection or pressure increase and decrease tests are difficult to apply; complex stethoscope detection and detector detection are too cumbersome, the cycle is too long, and lack practicality. Utility Model Content

[0003] The utility model aims to solve the problem in the prior art that it is difficult to detect internal leakage of the pipe sleeve joint due to loosening or failure of the rubber ring at the pipe connection of the pipe sleeve joint. The utility model improves the structure of the pipe sleeve joint and provides a testable pipe sleeve joint structure and a sealing rubber ring which can connect the pipe sleeve joint to the pipes on both sides and conveniently detect whether there is leakage at the connection.

[0004] The technical solution adopted by the utility model is:

[0005] A sealing rubber ring, comprising:

[0006] The rubber ring body extends along the circumferential direction of the sealing rubber ring; the rubber ring body at least has:

[0007] a first inner surface, facing the axis of the sealing rubber ring, on which a first sealing lip and a second sealing lip are respectively arranged near both ends, wherein the first sealing lip is composed of a plurality of first sealing lips, and the second sealing lip is composed of a plurality of second sealing lips; and

[0008] A first external surface, disposed on the back side of the first internal surface;

[0009] Among them, the sealing rubber ring is also provided with at least one first pressure test through hole and at least one second pressure test through hole, both of which pass through the first inner surface and the first outer surface. The first pressure test through hole is arranged between adjacent first sealing lips, and the second pressure test through hole is arranged between adjacent second sealing lips.

[0010] Furthermore, the first sealing lip and the second sealing lip are arranged at an angle, and both have an inner side surface close to the middle of the first inner connecting surface and an outer side surface close to both ends of the first inner connecting surface, a first angle between the inner side surface and the first inner connecting surface is less than 90°, and a second angle between the outer side surface and the first inner connecting surface is greater than 90°.

[0011] Furthermore, a groove portion is provided on the first external surface.

[0012] Furthermore, the groove portion is composed of a plurality of grooves at equal intervals.

[0013] Furthermore, the groove is a dovetail groove.

[0014] Furthermore, a limiting platform is provided in the middle of the first inner connecting surface and between the first sealing lip and the second sealing lip.

[0015] Furthermore, working platforms with a height lower than that of the limiting platform are arranged on both sides of the limiting platform.

[0016] A testable pipe sleeve joint structure, comprising:

[0017] A sealing rubber ring as described above;

[0018] An outer sleeve is sleeved on the first outer surface of the sealing rubber ring, and the body of the outer sleeve extends along the circumferential direction of the outer sleeve; and the outer sleeve is provided with outer through holes corresponding to the first pressure test through holes and the second pressure test through holes;

[0019] a pressure test pipe fitting in a hollow cylindrical shape, embedded in the outer through hole, and passing through the first pressure test through hole or the second pressure test through hole; and

[0020] The first inner pipe and the second inner pipe are respectively embedded from both sides of the first inner surface of the sealing rubber ring.

[0021] Furthermore, an external thread is provided on the outer wall of the pressure test fitting, and an internal fastening nut threadedly connected to the pressure test fitting is provided on the first inner surface; the outer sleeve has at least a second external surface, and an external fastening nut threadedly connected to the pressure test fitting is provided on the second external surface.

[0022] Furthermore, the pressure test pipe fitting is a hollow screw member that can be equipped with a screw plug.

[0023] Furthermore, the pressure test pipe is provided with an internal thread on the inner side wall of one end of the outer sleeve.

[0024] The beneficial effects of the utility model are:

[0025] 1. The sealing rubber ring of the utility model forms a gap while sealing the connection between the object pipes on both sides by arranging the first sealing lip and the second sealing lip on the first inner surface, and then tests the pressure by using the formed gap by arranging the first pressure test through hole and the second pressure test through hole, thereby realizing convenient inspection and judgment of the leakage of the pipe connection, and solving the problem in the prior art that it is difficult to find the internal leakage of the pipe sleeve joint due to gaps and looseness at the pipe connection of the pipe sleeve joint.

[0026] 2. The sleeve joint structure of the utility model forms a gap while sealing the connection between the object pipes on both sides by setting the first sealing lip and the second sealing lip on the first inner surface, and then tests the pressure by using the formed gap by setting the first pressure test through hole and the second pressure test through hole, the outer through hole and the pressure test pipe fitting, thereby realizing convenient inspection and judgment of leakage at the pipe connection, solving the problem in the prior art that it is difficult to detect internal leakage of the pipe sleeve joint due to gaps and looseness at the pipe connection.

[0027] 3. The sleeve joint structure of the utility model can realize pressure testing section by section when installing pipe sections, and the installation quality can be tested by the pressure test pipe fittings reserved for the pipe sleeve joint to ensure that each joint does not leak water, air, or other substances. At the same time, when leakage occurs at the pipe joint due to cracks, loss of roundness or other defects in the sleeve, the pressure test pipe fittings can also be used for glue injection repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic diagram of the expansion of the sealing rubber ring of the embodiment of the utility model;

[0030] Figure 2 A circumferential cross-sectional view of a sealing rubber ring according to an embodiment of the utility model;

[0031] Figure 3 for Figure 2 A magnified image of point A;

[0032] Figure 4 A three-dimensional schematic diagram of a joint structure according to an embodiment of the utility model;

[0033] Figure 5 This is an axial view of the joint structure of an embodiment of the utility model;

[0034] Figure 6 for Figure 5 A cross-sectional view of the BB surface;

[0035] Figure 7 It is a circumferential cross-sectional view of the outer sleeve of an embodiment of the utility model.

[0036] Figure 8 A cross-sectional view of a connection state of a joint structure of an embodiment of the utility model;

[0037] Reference numerals:

[0038] α-first angle, β-second angle;

[0039] 111-first pressure test through hole, 112-second pressure test through hole, 120-first inner connecting surface, 122-first sealing lip, 1220-first sealing lip, 1221-inner side surface, 1229-outer side surface, 124-position limiting platform, 125-working platform, 126-second sealing lip, 1260-second sealing lip, 140-first outer connecting surface, 142-groove portion;

[0040] 200-outer sleeve, 210-outer through hole, 220-second inner connecting surface, 222-convex rib portion, 240-second outer connecting surface;

[0041] 300-pressure test fittings;

[0042] 410-inner fastening nut, 420-outer fastening nut;

[0043] 510 - first inner pipe, 520 - second inner pipe. DETAILED DESCRIPTION

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0046] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0047] See also Figure 1-Figure 3 The first embodiment provides a sealing rubber ring, which is made of elastic material and is used to simultaneously connect the pipe sleeve joint and the inner pipes on both sides that need to be connected and can easily detect whether there is leakage at the connection. The sealing rubber ring mainly includes a rubber ring body, which extends along the circumferential direction of the sealing rubber ring; the rubber ring body has at least a first inner surface 120 and a first outer surface 140.

[0048] like Figure 1 , Figure 2 As shown in the figure, the first inner surface 120 faces the axis of the sealing rubber ring and serves as the inner wall of the sealing rubber ring, which is used to connect the inner pipes on both sides of the pipe sleeve joint. The first inner surface 120 is provided with a first sealing lip 122 and a second sealing lip 126 near both ends. The first sealing lip 122 is composed of a plurality of first sealing lips 1220, and the second sealing lip 126 is composed of a plurality of second sealing lips 1260. In a specific embodiment, there are six first sealing lips 1220 and six second sealing lips 1260. The elastic sealing lip structures on both sides are compressed by fluid pressure to simultaneously achieve the sealing of the inner pipe connection on both sides. At the same time, due to the presence of the plurality of first sealing lips 1220 and the second sealing lips 1260, a closed gap is formed between the outer wall of the inner pipe on both sides and the first inner surface 120, and between adjacent first sealing lips 1220 or second sealing lips 1260.

[0049] like Figure 1 , Figure 2 As shown in the figure, the first external surface 140 is the outer wall of the sealing rubber ring, which is arranged on the back side of the first internal surface 120 and is used to connect and fix the outer sleeve of the pipe sleeve joint. The first external surface 140 is provided with a groove portion 142, which is used to connect with the convex rib portion 222 on the outer sleeve 200 adapted thereto, so as to fix the sealing rubber ring to the outer sleeve 200. It should be pointed out that the groove portion 142 can be one groove or multiple grooves, and multiple grooves can make the connection more stable and firm.

[0050] In order to test the performance of the pipeline, it is usually necessary to inject high-pressure liquid or gas into the pipeline for pressure testing. When the sealing rubber ring at the pipeline connection is not sealed tightly and there is a possibility of leakage, the gap between the adjacent first sealing lips 1220 or second sealing lips 1260 during the pressure test is filled with high-pressure liquid or gas due to the failure of the sealing lips, causing the pressure in the gap to increase. In order to measure the pressure in the gap and judge the effectiveness of the sealing rubber ring, such as Figure 1 , Figure 2As shown in , the sealing rubber ring of this embodiment is also provided with a first pressure test through hole 111 and a second pressure test through hole 112 that penetrate the first inner surface 120 and the first outer surface 140. The first pressure test through hole 111 is provided between adjacent first sealing lips 1220, and the second pressure test through hole 112 is provided between adjacent second sealing lips 1260, thereby connecting the closed gap. Specifically, in one embodiment, three first sealing lips 1220 or two second sealing lips 1260 are provided on both sides of the first pressure test through hole 111 and the second pressure test through hole 112. Among them, the first pressure test through hole 111 and the second pressure test through hole 112 are both used to install the pressure test fitting 300. When high-pressure liquid or gas is injected, the pressure in the gap between the outer walls of the inner pipes on both sides and the first inner connection surface 120 is measured by the pressure gauge at the other end of the pressure test fitting 300, so as to judge the effectiveness of the sealing of the sealing rubber ring at the pipe connection. When leakage occurs at the pipe joint due to cracks, out-of-roundness or other defects in the sleeve, the first pressure test through hole 111 and the second pressure test through hole 112 can also be used to perform glue injection repair treatment.

[0051] In this embodiment, the sealing rubber ring forms a gap while sealing the internal pipe connections on both sides by setting the first sealing lip 122 and the second sealing lip 126 on the first inner surface 120, and then the pressure is tested by using the formed gap by setting the first pressure test hole 111 and the second pressure test hole 112, thereby realizing convenient inspection and judgment of leakage at the pipe connection, solving the problem in the prior art that it is difficult to detect internal leakage of the pipe sleeve joint due to loose or failed rubber ring at the pipe connection of the pipe sleeve joint.

[0052] Preferably, the elastic material used for the sealing rubber ring in this embodiment is EPDM rubber, but natural rubber and synthetic rubber, not limited to this material, may also be used.

[0053] Preferably, in one or more embodiments, Figure 3 As shown in , the first sealing lip 1220 and the second sealing lip 1260 are arranged obliquely, and both have an inner side surface 1221 close to the middle of the first inner connecting surface 120 and an outer side surface 1229 close to both ends of the first inner connecting surface 120. Figure 2 As shown, the first angle α between the inner side surface 1221 and the first inner surface 120 is less than 90°, and the second angle β between the outer side surface 1229 and the first inner surface 120 is greater than 90°, so that the inclination direction of the first sealing lip 1220 and the second sealing lip 1260 are opposite to the insertion direction of the inner pipes on both sides, and the inner pipes on both sides can be easily inserted and assembled, and are not easy to loosen and detach along the insertion direction, thereby improving the tightness of the pipe connection. Further, the first angle α is preferably 45°~75°, and the second angle β is preferably 120°~150°. In a specific embodiment, the first angle α is 60°, and the second angle β is 135°.

[0054] Preferably, in one or more embodiments, the groove portion 142 is composed of a plurality of equally spaced grooves, each of which is an isosceles trapezoid, and the width of each groove gradually increases in the direction of deepening into the first external surface 140 to form a dovetail groove. At the same time, the corresponding rib portion 222 is also provided with a plurality of equally spaced dovetail-shaped ribs. The dovetail groove and the dovetail-shaped ribs can improve the stability of the connection when the sealing rubber ring is connected to the outer sleeve. When the sealing rubber ring and the outer sleeve need to be separated, the dovetail groove on the sealing rubber ring made of the elastic material is easily deformed and opened, and then it can be easily separated from the dovetail-shaped rib.

[0055] Preferably, in one or more embodiments, there are two or more first pressure test holes 111 and second pressure test holes 112. If an inflation test is required, one on each side may be provided. If a water injection test is required, there are at least two first pressure test holes 111 and second pressure test holes 112 on a single side. Multiple holes may be provided depending on the pipe diameter or to facilitate subsequent repair by glue injection without affecting the structural mechanics.

[0056] Preferably, the openings of the first pressure test through hole 111 and the second pressure test through hole 112 on one side of the first external surface 140 are located at the bottom of the groove portion 142, so as to facilitate the production of the first pressure test through hole 111 when producing the sealing rubber ring.

[0057] Preferably, in one or more embodiments, a protruding limit platform 124 is provided in the middle of the first inner surface 120 and between the first sealing lip 122 and the second sealing lip 126, which is used to limit the length of the inner pipes on both sides extending into the sealing rubber ring, so as to avoid the inner pipe on one side extending too long and the inner pipe on the other side extending too short during the assembly process, resulting in a decrease in connection stability. Furthermore, a working platform 125 with a height lower than the limit platform 124 is provided on both sides of the limit platform 124, so as to avoid excessive expansion of the connection ends of the inner pipes on both sides, resulting in a too small gap between the outer wall of the pipe and the first inner surface 120, thereby affecting the pressure test. In addition, the limit platform 124 can also be designed as an isosceles trapezoid, whose larger bottom surface is connected to the first inner surface 120. The isosceles trapezoid limit platform 124 has better stability and is not prone to bending, twisting and displacement.

[0058] A second embodiment is provided below, which further provides a testable pipe sleeve joint structure in combination with the sealing rubber ring in the above embodiment.

[0059] See also Figure 4-Figure 8 The testable pipe sleeve joint structure in the second embodiment is used to connect the pipes on both sides and can easily detect whether there is leakage at the connection. The testable pipe sleeve joint structure mainly includes: the sealing rubber ring and the outer sleeve 200, the pressure test pipe fitting 300, the first inner pipe 510 and the second inner pipe 520 in the above-mentioned embodiment.

[0060] like Figure 4-Figure 7 As shown in the figure, the outer sleeve 200 is sleeved on the first outer surface 140 of the sealing rubber ring, and the outer sleeve body extends along the circumferential direction of the outer sleeve 200; the second inner surface 220 of the outer sleeve body is provided with a convex rib 222 adapted to the groove 142 of the sealing rubber ring, and the outer sleeve body is provided with an outer through hole 210 corresponding to the first pressure test through hole 111 and the second pressure test through hole 112 of the sealing rubber ring. On the one hand, the outer sleeve 200 applies pressure to the sealing rubber ring of the elastic material so that it can be tightly pressed on the inner pipes on both sides to maintain the stability of the entire joint structure; on the other hand, the outer sleeve 200 provides protection for the sealing rubber ring of the elastic material to prevent the sealing rubber ring with lower strength from being damaged.

[0061] like Figure 4-Figure 6 As shown in , the pressure test pipe 300 is in the shape of a hollow cylinder, embedded in the outer through hole 210, and passes through the first pressure test through hole 111 or the second pressure test through hole 112, and is used to communicate the gap between the adjacent first sealing lips 1220 or the second sealing lips 1260. In addition, the pressure test pipe 300 located at one end outside the outer sleeve 200 can be connected to a pressure gauge, so as to detect the pressure of the gap between the outer wall of the inner pipe on both sides and the first inner surface 120 of the sealing rubber ring, thereby judging whether there is leakage or poor sealing at the pipe connection.

[0062] like Figure 8 As shown in FIG. 1 , the first inner pipe 510 and the second inner pipe 520 are respectively embedded from both sides of the first inner surface 120 of the sealing rubber ring, and are sealed and connected through the first sealing lip 122 and the second sealing lip 126 .

[0063] In this embodiment, the sealing rubber ring forms a gap while sealing the inner pipe connections on both sides by setting the first sealing lip 122 and the second sealing lip 126 on the first inner surface 120, and then tests the pressure by using the formed gap by setting the first pressure test through hole 111 and the second pressure test through hole 112, the outer through hole 210 and the pressure test pipe fitting 300, thereby realizing convenient inspection and judgment of leakage at the pipe connection, and solving the problem in the prior art that it is difficult to detect internal leakage of the pipe sleeve joint due to loose or failed rubber ring at the pipe connection of the pipe sleeve joint.

[0064] Preferably, in one or more embodiments, the outer sleeve 200 is wound with a fiberglass reinforced plastic material, and may also be made of other materials such as stainless steel.

[0065] Preferably, in one or more embodiments, an outer wall of the pressure test pipe 300 is provided with an external thread, and an inner fastening nut 410 threadedly connected to the pressure test pipe 300 is provided on the first inner surface 120 of the sealing rubber ring; an outer fastening nut 420 threadedly connected to the pressure test pipe 300 is provided on the second outer surface 240 of the outer sleeve 200. By providing the inner fastening nut 410 and the outer fastening nut 420, the position stability of the pressure test pipe 300 is enhanced, and the connection stability between the sealing rubber ring and the outer sleeve 200 is also enhanced.

[0066] Preferably, in one or more embodiments, the pressure test fitting 300 is a hollow screw member that can be equipped with a screw plug. The pressure test fitting 300 is provided with a detachable structure such as an internal thread, an external thread or a clamping ring on the inner side wall of one end of the outer sleeve 200, which is used for detachably connecting an external screw plug and a pressure gauge. When leakage occurs at the pipe joint due to cracks, loss of roundness or other defects in the sleeve, the pressure test fitting 300 can also be used for glue injection repair.

[0067] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A sealing rubber ring, characterized in that: Include: The rubber ring body extends along the circumferential direction of the sealing rubber ring; the rubber ring body at least has: A first inner surface (120) faces the axis of the sealing rubber ring, and is provided with a first sealing lip (122) and a second sealing lip (126) near both ends thereof, wherein the first sealing lip (122) is composed of a plurality of first sealing lips (1220), and the second sealing lip (126) is composed of a plurality of second sealing lips (1260); and A first external connecting surface (140) is arranged on the back side of the first internal connecting surface (120); The sealing rubber ring is further provided with at least one first pressure test through hole (111) and at least one second pressure test through hole (112), both of which penetrate the first inner surface (120) and the first outer surface (140); the first pressure test through hole (111) is arranged between adjacent first sealing lips (1220), and the second pressure test through hole (112) is arranged between adjacent second sealing lips (1260).

2. The sealing rubber ring according to claim 1, characterized in that: The first sealing lip (1220) and the second sealing lip (1260) are arranged at an angle, and both have an inner side surface (1221) close to the middle of the first inner connecting surface (120) and an outer side surface (1229) close to both ends of the first inner connecting surface (120), a first angle (α) between the inner side surface (1221) and the first inner connecting surface (120) is less than 90°, and a second angle (β) between the outer side surface (1229) and the first inner connecting surface (120) is greater than 90°.

3. The sealing rubber ring according to claim 1, characterized in that: A groove portion (142) is provided on the first external connection surface (140).

4. The sealing rubber ring according to claim 3, characterized in that: The groove portion (142) is composed of a plurality of grooves at equal intervals.

5. The sealing rubber ring according to claim 4, characterized in that: The groove is a dovetail groove.

6. The sealing rubber ring according to claim 1, characterized in that: A limiting platform (124) is also provided in the middle of the first inner connecting surface (120), and located between the first sealing lip (122) and the second sealing lip (126).

7. The sealing rubber ring according to claim 6, characterized in that: Working table portions (125) whose height is lower than that of the limiting table portion (124) are also arranged on both sides of the limiting table portion (124).

8. A testable pipe sleeve joint structure, characterized in that: Include: The sealing rubber ring according to any one of claims 1 to 7; An outer sleeve (200) is sleeved on the first external surface (140) of the sealing rubber ring, and the body of the outer sleeve extends along the circumferential direction of the outer sleeve (200); and the outer sleeve (200) is provided with an outer through hole (210) corresponding to the first pressure test through hole (111) and the second pressure test through hole (112); The pressure test pipe (300) is in the shape of a hollow cylinder, is embedded in the outer through hole (210), and passes through the first pressure test through hole (111) or the second pressure test through hole (112); and The first inner pipe (510) and the second inner pipe (520) are respectively embedded from both sides of the first inner surface (120) of the sealing rubber ring.

9. The testable pipe sleeve joint structure according to claim 8, characterized in that: The outer wall of the pressure test pipe (300) is provided with an external thread, and the first inner surface (120) is provided with an internal fastening nut (410) threadedly connected to the pressure test pipe (300); the outer sleeve (200) has at least a second external surface (240), and the second external surface (240) is provided with an external fastening nut (420) threadedly connected to the pressure test pipe (300).

10. The testable pipe sleeve joint structure according to claim 8, characterized in that: The pressure test pipe fitting (300) is a hollow screw member that can be equipped with a screw plug.

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