Pipe joint and pipeline connecting structure

Abstract

The invention discloses a pipe joint and a pipeline connecting structure, and the pipe joint comprises a first tile-shaped body (1), a second tile-shaped body (2) and a sealing ring (3); a supporting sleeve (4) is arranged between the sealing ring (3) and the groove wall of the annular groove (10), the sealing ring (3) is sleeved with the supporting sleeve (4), the supporting sleeve (4) is attached to the outer wall of the sealing ring (3), the supporting sleeve (4) is in an open ring shape extending in the circumferential direction of the sealing ring (3), and an opening (4e) of the supporting sleeve (4) is staggered from the butt joint position of the first protruding lug (12) and the second protruding lug (22). At the butt joint of the first convex lug and the second convex lug, the supporting sleeve supports the sealing ring and prevents the sealing ring from expanding towards a gap at the butt joint of the first convex lug and the second convex lug, so that the service life of the sealing ring is prolonged, and the sealing effect is ensured; meanwhile, the supporting sleeve is in the shape of an open ring, and a deformation space is reserved for the supporting sleeve through the opening.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline connection, and in particular to a pipe joint and a pipeline connection structure. Background Art

[0002] In the pipeline connection structure, the pipe joint is the connection tool between pipe fittings. Pipe fittings are used to transport fluids such as gas and liquid.

[0003] The pipe joint generally includes a first shoe-shaped body, a second shoe-shaped body, and a sealing ring. The inner wall of the first shoe-shaped body has a first arc-shaped groove, and the first shoe-shaped body also has a first lug; the second shoe-shaped body is butt-jointed with the first shoe-shaped body, and the inner wall of the second shoe-shaped body has a second arc-shaped groove spliced ​​with the first arc-shaped groove to form an annular groove, and the second shoe-shaped body has a second lug connected to the first lug; the sealing ring is arranged in the annular groove. The first pipe fitting and the second pipe fitting are both inserted into the sealing ring. For example, the Chinese utility model patent with the authorization number CN 208295349 U discloses "A Pipeline Joint".

[0004] Due to the limitations of manufacturing precision and production process, there may be a gap at the joint of the first lug and the second lug, which results in the failure to form a continuous full circle after the first arc-shaped groove and the second arc-shaped groove are joined, that is, the annular groove is disconnected circumferentially at the joint of the first lug and the second lug. For example, the first shoe-shaped body and the second shoe-shaped body are formed by stamping. To form the lug, an arc surface must be formed at the bend. A gap at the joint of the first lug and the second lug is inevitable, so the sealing ring lacks support at the position of the gap. Under the action of the fluid in the pipe fitting, the sealing ring expands toward the gap or shrinks. When the fluid pressure is unstable, the sealing ring expands and shrinks more frequently at this position, and the local aging is easy, which affects the service life of the sealing ring and causes sealing failure.

[0005] Therefore, further improvements are needed. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to provide a pipe joint in view of the current status of the prior art, which can prevent the sealing ring from expanding into the gap at the joint between the first lug and the second lug.

[0007] The second technical problem to be solved by the present invention is to provide a pipeline connection structure.

[0008] The present invention adopts the following technical solution to solve the above-mentioned first technical problem: a pipe joint, characterized in that: it comprises

[0009] A first shoe-shaped body, the inner wall of which has a first arc-shaped groove; the first shoe-shaped body has a first lug;

[0010] A second shoe-shaped body is butt-jointed with the first shoe-shaped body, the inner wall of the second shoe-shaped body having a second arc groove spliced ​​with the first arc groove to form an annular groove; the second shoe-shaped body having a second lug connected with the first lug;

[0011] The sealing ring is annular and is arranged in the annular groove;

[0012] Features:

[0013] A support sleeve is arranged between the sealing ring and the wall of the annular groove. The support sleeve is arranged outside the sealing ring and fits with the outer wall of the sealing ring. The support sleeve is in an open ring shape extending along the circumference of the sealing ring. The opening of the support sleeve is staggered with the joint of the first lug and the second lug. In order to facilitate the manufacture and assembly of the support sleeve, the support sleeve includes a first support sleeve in an open ring shape, and a second support sleeve in an open ring shape and spaced apart from the first support sleeve along the axial direction;

[0014] The opening of the first support sleeve is recorded as a first opening, and the opening of the second support sleeve is recorded as a second opening. The first opening and the second opening are both staggered with respect to the joint between the first lug and the second lug.

[0015] In order to make the sealing ring more evenly acted upon by the support sleeve, the first opening and the second opening are aligned in the axial direction.

[0016] In order to improve the supporting effect on the sealing ring, the first supporting sleeve and the second supporting sleeve are abutted against each other in the axial direction. In this way, there is no gap between the first supporting sleeve and the second supporting sleeve in the axial direction, and the supporting effect on the sealing ring is better.

[0017] In order to make the first support sleeve and the second support sleeve common, the support sleeves are evenly split in half along the axial direction to form the first support sleeve and the second support sleeve.

[0018] In order to improve the supporting effect on the sealing ring, the strength of the supporting sleeve is greater than the strength of the sealing ring.

[0019] The sealing ring and the support sleeve can have various shapes. Preferably, the sealing ring includes

[0020] Ring-shaped body;

[0021] There are two lips, which are connected to the corresponding edges of the annular body in the axial direction respectively;

[0022] The support sleeve comprises

[0023] The first section is in contact with the outer wall of the annular body;

[0024] There are two second sections, which are respectively connected to the corresponding axial edges of the first section, and each second section is in contact with the corresponding lip outer wall.

[0025] In order to prevent the support sleeve from interfering with the sealing of the sealing ring, one end of the lip connected to the annular body is recorded as a fixed end, and the other end is a free end, and the free end extends out of the support sleeve. In this way, it is ensured that the free end can exert a sealing effect without being affected by the support sleeve.

[0026] The technical solution adopted by the present invention to solve the above second technical problem is: a pipeline connection structure, characterized in that it includes the pipe joint as mentioned above.

[0027] Preferably, the first pipe and the second pipe are both axially inserted into the sealing ring. When the first lug and the second lug are locked, the sealing ring seals and connects the first pipe and the second pipe.

[0028] Compared with the prior art, the present invention has the advantages that: by providing a support sleeve, the opening of the support sleeve is staggered with the joint of the first lug and the second lug, and at the joint of the first lug and the second lug, the support sleeve supports the sealing ring and prevents the sealing ring from expanding into the gap at the joint of the first lug and the second lug, thereby facilitating the extension of the service life of the sealing ring and ensuring the sealing effect;

[0029] At the same time, the support sleeve is in an open ring shape. When the first tile-shaped body and the second tile-shaped body are tightly locked, the opening of the open ring shape reserves a deformation space for the support sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of a pipe joint according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 Cross-sectional view of pipe joint;

[0032] Figure 3 for Figure 2 Schematic diagram of the assembly of the middle support sleeve and the sealing ring;

[0033] Figure 4 for Figure 3 Schematic diagram from another angle;

[0034] Figure 5 for Figure 2 Exploded view of the pipe joint;

[0035] Figure 6 This is a schematic diagram of the positional relationship between the first support sleeve, the second support sleeve, and the sealing ring of the present invention;

[0036] Figure 7 It is a schematic diagram of the assembly of the first support sleeve, the second support sleeve and the sealing ring of the present invention;

[0037] Figure 8 for Figure 1 a cross-section at another location;

[0038] Fig. 9 for Figure 8 Schematic diagram after removing the support sleeve;

[0039] Fig.10 It is a cross-sectional view of the first tile-shaped body and the second tile-shaped body in a locked state;

[0040] Fig.11 for Fig.10 Schematic diagram after installing the support sleeve;

[0041] Fig.12 for Fig.11 Schematic diagram after installing the sealing ring;

[0042] Fig.13 for Fig.12 Exploded view of the pipe joint;

[0043] Fig.14 for Fig.12 Another exploded view of the pipe joint;

[0044] Fig.15 A schematic diagram of a pipeline connection structure according to an embodiment of the present invention;

[0045] Fig.16 for Fig.15 Exploded view of the pipe connection structure;

[0046] Fig.17 for Fig.15 Cross-sectional view of the pipe connection structure. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below with reference to the accompanying drawings.

[0048] See also Figure 1 to Figure 14 , which is a preferred embodiment of the pipe joint of the present invention. The pipe joint comprises a first tile-shaped body 1, a second tile-shaped body 2, a sealing ring 3, a support sleeve 4 and other main components.

[0049] The inner wall of the first shoe-shaped body 1 has a first arc-shaped groove 11 ; the first shoe-shaped body 1 has a first lug 12 .

[0050] The second shoe-shaped body 2 is butt-jointed with the first shoe-shaped body 1 , and the inner wall of the second shoe-shaped body 2 has a second arc groove 21 which is spliced ​​with the first arc groove 11 to form an annular groove 10 ; the second shoe-shaped body 2 has a second lug 22 which is connected with the first lug 12 .

[0051] The sealing ring 3 is annular and is arranged in the annular groove 10 .

[0052] See also Figure 3 to Figure 14The support sleeve 4 is arranged between the sealing ring 3 and the groove wall of the annular groove 10. The support sleeve 4 is sleeved outside the sealing ring 3 and fits with the outer wall of the sealing ring 3. The support sleeve 4 is an open ring extending along the circumference of the sealing ring 3. The opening 4e of the support sleeve 4 is staggered with the joint of the first lug 12 and the second lug 22 (see Fig.11 , Fig.13 The gap X between the first lug 12 and the second lug 22 at the joint is as follows: Figure 8 , Fig. 9 As shown, Fig. 9 The middle seal ring 3 lacks support at the gap X. Figure 8 The middle support sleeve 4 supports the sealing ring 3 to prevent the sealing ring 3 from expanding toward the gap X. Preferably, when the first lug 12 and the second lug 22 are locked, the opening 4e ( Figure 7 ) is smaller (the smaller the better). The strength of the support sleeve 4 is greater than that of the sealing ring 3. For example, the support sleeve 4 is made of zinc steel sheet with a wall thickness of 0.2 to 0.3 mm, and the sealing ring 3 is made of rubber. The material of the support sleeve 4 is adjusted as needed to meet the strength requirements of the support sealing ring 3 and the fluid acting on the sealing ring 3.

[0053] The structure of the support sleeve 4 can be implemented in two different ways: first, the support sleeve 4 is an integral piece, in the form of an open ring that matches the shape of the outer wall of the sealing ring 3, which helps to reduce the installation process; second, the support sleeve 4 of the aforementioned shape is radially cut into two parts, preferably cut in half, which is convenient for manufacturing and installation, and the two parts are butt-jointed during installation.

[0054] The second embodiment of the support sleeve 4 is described in detail below. Figure 6 , Figure 7 The support sleeve 4 includes a first support sleeve 41 in an open ring shape, and a second support sleeve 42 in an open ring shape that is spaced apart from the first support sleeve 41 in the axial direction (they are butted in the axial direction, and the smaller the gap at the butt joint is, the better. It is preferred that the first support sleeve 41 and the second support sleeve 42 abut against each other in the axial direction.); the opening of the first support sleeve 41 is recorded as the first opening 411, and the opening of the second support sleeve 42 is recorded as the second opening 421. The first opening 411 and the second opening 421 are both staggered from the butt joint of the first lug 12 and the second lug 22. The support sleeve 4 is preferably evenly split in the axial direction to form the above-mentioned first support sleeve 41 and the second support sleeve 42. The even split here refers to a basically even split, allowing a certain error. At this time, the positions of the first opening 411 and the second opening 421 can be either axially aligned or axially staggered; in other embodiments, the ratio of the split of the support sleeve 4 in the axial direction can be adjusted as needed, for example, the support sleeve 4 can also be split in 4:6 or 3:7 in the axial direction, so that the sizes of the first support sleeve 41 and the second support sleeve 42 are different.

[0055] The shapes of the sealing ring 3 and the supporting sleeve 4 are as follows: the sealing ring 3 includes an annular body 31 and a lip 32; there are two lips 32, which are respectively connected to the corresponding axial edges of the annular body 31, and one end of the lip 32 connected to the annular body 31 is recorded as a fixed end, and the other end is a free end 321 ( Figure 3 , Figure 4 ), the free end 321 extends out of the support sleeve 4. Figure 3 , Figure 4 The support sleeve 4 includes a first section 4a and a second section 4b; the first section 4a is in contact with the outer wall of the annular body 31; there are two second sections 4b, which are respectively connected to the corresponding axial edges of the first section 4a, and each second section 4b is in contact with the outer wall of the corresponding lip 32. Figure 3 It can be seen that the first section 4a is a split piece, divided into a left half section 4c and a right half section 4d. The left half section 4c is connected to the second section 4b on the left to form a first support sleeve 41, and the right half section 4d is connected to the second section 4b on the right to form a second support sleeve 41.

[0056] See also Figure 15 to Figure 17 , is a preferred embodiment of the pipeline connection structure of the present invention, which includes the above-mentioned pipe joint, the first pipe 100 and the second pipe 200, both of which are axially inserted into the sealing ring 3, the outer walls of the first pipe 100 and the second pipe 200 have annular limiting ribs 100a, and the inner walls of the first shoe-shaped body 1 and the second shoe-shaped body 2 have limiting grooves 1a for the limiting ribs 100a to be embedded, so that after the pipe joint is locked, the pipe joint, the first pipe 100 and the second pipe 200 will not be axially disengaged. A gasket 20 is arranged outside the first lug 12 and the second lug 22. After the first lug 12 and the second lug 22 are locked by bolts 30, the sealing ring 3 seals the first pipe 100 and the second pipe 200.

[0057] The working principle and usage are as follows:

[0058] See also Fig.17 , the sealing ring 3 is mounted on the ends of the first pipe fitting 100 and the ends of the second pipe fitting 200, the first support sleeve 41 and the second support sleeve 42 are mounted on the outside of the sealing ring 3, the annular grooves 10 of the first tile body 1 and the second tile body 2 are aligned with the first support sleeve 41 and the second support sleeve 42, and the first opening 411 of the first support sleeve 41 and the second opening 421 of the second support sleeve 42 are staggered with the joint of the first lug 12 and the second lug 22, the first lug 12 and the second lug 22 are locked and fastened by bolts 30, so that the sealing ring 3 seals the joint of the first pipe fitting 100 and the second pipe fitting 200, and the support sleeve 4 supports the sealing ring 3 at the joint of the first lug 12 and the second lug 22, and the sealing ring 3 will not expand into the gap X at the joint of the first lug 12 and the second lug 22, which is beneficial to improve the service life of the sealing ring 3 and ensure the sealing effect.

Claims

1. A pipe joint, characterized in that: Included A first shoe-shaped body (1), the inner wall of which has a first arc-shaped groove (11); the first shoe-shaped body (1) has a first lug (12); A second shoe-shaped body (2) is butt-jointed with the first shoe-shaped body (1), the inner wall of the second shoe-shaped body (2) having a second arc-shaped groove (21) joined with the first arc-shaped groove (11) to form an annular groove (10); the second shoe-shaped body (2) having a second lug (22) connected with the first lug (12); A sealing ring (3) is annular and is disposed in the annular groove (10); Features: A support sleeve (4) is arranged between the sealing ring (3) and the groove wall of the annular groove (10). The support sleeve (4) is sleeved outside the sealing ring (3) and fits with the outer wall of the sealing ring (3). The support sleeve (4) is in the shape of an open ring extending along the circumference of the sealing ring (3). The opening (4e) of the support sleeve (4) is staggered with the joint between the first lug (12) and the second lug (22).

2. The pipe joint according to claim 1, characterized in that: The support sleeve (4) comprises a first support sleeve (41) in the form of an open ring, and a second support sleeve (42) in the form of an open ring and spaced apart from the first support sleeve (41) along the axial direction; The opening of the first support sleeve (41) is recorded as the first opening (411), and the opening of the second support sleeve (42) is recorded as the second opening (421). The first opening (411) and the second opening (421) are both staggered with respect to the joint between the first lug (12) and the second lug (22).

3. The pipe joint according to claim 2, characterized in that: The first opening (411) and the second opening (421) are aligned in the axial direction.

4. The pipe joint according to claim 2, characterized in that: The first support sleeve (41) and the second support sleeve (42) are in abutment with each other in the axial direction.

5. The pipe joint according to claim 2, characterized in that: The support sleeve (4) is evenly split in half along the axial direction to form the first support sleeve (41) and the second support sleeve (42).

6. The pipe joint according to claim 1, characterized in that: The strength of the support sleeve (4) is greater than the strength of the sealing ring (3).

7. The pipe joint according to claim 1, characterized in that: The sealing ring (3) comprises Ring-shaped body (31); There are two lips (32), which are respectively connected to the corresponding axial edges of the annular body (31); The support sleeve (4) comprises The first section (4a) is in contact with the outer wall of the annular body (31); There are two second sections (4b), which are respectively connected to the corresponding axial edges of the first section (4a), and each second section (4b) is in contact with the outer wall of the corresponding lip edge (32).

8. The pipe joint according to claim 7, characterized in that: One end of the lip (32) connected to the annular body (31) is marked as a fixed end, and the other end is a free end (321), and the free end (321) extends out of the support sleeve (4).

9. A pipeline connection structure, characterized in that: The invention comprises the pipe joint according to any one of claims 1 to 8.

10. The pipeline connection structure according to claim 9, characterized in that: It also includes a first pipe fitting (100) and a second pipe fitting (200) both axially inserted into the sealing ring (3); when the first lug (12) and the second lug (22) are in a locked state, the sealing ring (3) seals and connects the first pipe fitting (100) and the second pipe fitting (200).

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