A sealing structure for a bolt ball joint

Abstract

The present invention relates to the technical field of ball node sealing, and specifically to a sealing structure of a bolt ball node, comprising: a connecting sphere, a connecting screw hole being provided on the surface of the connecting sphere, a steel pipe rod with a hollow structure being provided on the outer side of the connecting sphere; a sleeve being fixedly provided on the end of the cone head, and a sealing pressure plate being fixedly provided on the end of the sleeve; the cross-section of the bolt head being set into an arc shape that matches the cone head, and a second sealing layer being set between the two; the beneficial effect is: by providing a cone head at the end of the steel pipe rod, and a sleeve being provided at the end of the cone head, when the connecting bolt is connected to the connecting sphere through a thread, the sealing pressure plate presses the first sealing layer and the bolt head presses the second sealing layer, thereby ensuring the sealing effect of the device, and since the cross-sections of the sealing pressure plate, the cone head and the bolt head are all arc-shaped, the contact area between the two is larger, and the sealing structure can use an annular sealing gasket with a larger area or multiple sealing rings to ensure the sealing effect.

Description

Technical Field

[0001] The invention relates to the technical field of ball joint sealing, in particular to a sealing structure of a bolt ball joint. Background Art

[0002] Bolt balls are mostly used in grid structures. Multiple holes with internal threads are opened on a ball to connect multiple rods at one point. They are suitable for highly corrosive environments and marine equipment fields.

[0003] In the prior art, the bolt ball and the rod are fixed with a bolt. A cylindrical sleeve is sleeved on the outside of the bolt, and a sealing ring is provided at the end of the sleeve. After the bolt is tightened, the two ends of the sleeve respectively press the two sealing rings to achieve a sealing effect.

[0004] However, currently, the cross-sectional area of ​​the sleeve end is small, and the local pressure generated by the sleeve on the end sealing ring is large, which is easy to be damaged during installation, resulting in a poor sealing effect. Therefore, the present invention proposes a sealing structure for a bolt ball joint to solve the above problem. Summary of the Invention

[0005] The object of the present invention is to provide a sealing structure for a bolt-ball joint, so as to solve the problem in the above-mentioned background art that the sealing ring is easily damaged during installation, thereby affecting the sealing effect.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a sealing structure for a bolt-ball joint, comprising:

[0007] A connecting sphere, wherein a connecting screw hole is opened on the surface of the connecting sphere, and a hollow steel pipe rod is provided on the outside of the connecting sphere;

[0008] The end of the steel pipe rod is fixedly connected to a cone head, the end of the cone head is fixedly provided with a sleeve, the end of the sleeve is fixedly provided with a sealing pressure plate, the cross-sections of the cone head and the sealing pressure plate are both arranged to be arc-shaped, and the inner wall of the sealing pressure plate is bonded with a first sealing layer and fits with the surface of the connecting sphere;

[0009] A connecting bolt is located in the inner cavity of the steel pipe rod, one end of the connecting bolt is provided with a threaded section, one end of the connecting bolt passes through the sleeve and is plugged and fixed with the inner cavity of the connecting screw hole, and the other end of the connecting bolt is provided with a bolt head, the cross-section of the bolt head is set to an arc shape that is compatible with the cone head, and a second sealing layer is provided between the two.

[0010] Preferably, a sealing groove is provided in an annular manner on the inner wall of the cone head, an anti-slip groove is provided in an annular manner on the arc surface of the connecting bolt, and the second sealing layer is embedded in the inner cavity of the sealing groove and corresponds to the anti-slip groove.

[0011] Preferably, the cone head, sleeve and sealing pressure plate are integrally formed, the outer wall of the sleeve is fixedly connected to a plurality of reinforcing plates distributed in a circular array, and the two ends of the reinforcing plates are respectively fixedly connected to the outer wall of the cone head and the outer wall of the sealing pressure plate.

[0012] Preferably, an annular flange is provided on the outer side wall of the steel pipe rod, and friction lines are provided on the surface of the flange.

[0013] Preferably, the end face of the bolt head is fixedly connected with a polygonal boss, the end face of the polygonal boss is provided with a slot, and the cross-sections of the polygonal boss and the slot are both regular hexagons.

[0014] Preferably, the inner side wall of the cone head is fixedly connected with a plurality of anti-rotation protrusions distributed in a ring array, a limiting snap ring is provided on the outer side of the polygonal boss, a polygonal through hole adapted to the polygonal boss is provided in the middle part of the limiting snap ring, the outer side wall of the limiting snap ring is fitted with the inner wall of the cone head, and the outer side wall of the limiting snap ring is provided with an anti-rotation groove corresponding to the anti-rotation protrusion.

[0015] Preferably, a plurality of cutout grooves distributed in a ring array are formed on the side surface of the bolt head, and the cutout grooves correspond to the anti-rotation protrusions and are flush with the anti-rotation grooves.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a cone head at the end of a steel pipe rod, and a sleeve is provided at the end of the cone head. The cone head is a hollow structure, and a sealing pressure plate is provided at the end of the sleeve. After the connecting bolt passes through the sleeve, the bolt head fits against the inner wall of the cone head. A first sealing layer is embedded in the inner wall of the sealing pressure plate, and a second sealing layer is provided between the cone head and the bolt head. When the connecting bolt is connected to the connecting sphere through a thread, the sealing pressure plate presses the first sealing layer and the bolt head presses the second sealing layer, thereby ensuring the sealing effect of the device. Since the cross-sections of the sealing pressure plate, the cone head and the bolt head are all arc-shaped, the contact area between them is larger, and the sealing structure can use a larger-area annular sealing gasket or multiple sealing rings to ensure the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0020] Figure 3 This is an exploded schematic diagram of the overall structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the interior of the steel pipe rod structure of the present invention;

[0022] Figure 5 This is a three-dimensional schematic diagram of the limiting clamp structure of the present invention;

[0023] Figure 6 It is a three-dimensional schematic diagram of the connecting bolt structure of the present invention.

[0024] In the figure: 1. Connecting sphere; 11. Connecting screw hole; 2. Steel pipe rod; 22. Friction pattern; 3. Cone head; 31. Sealing groove; 32. Anti-rotation protrusion; 4. Sleeve; 41. Reinforced plate; 5. Sealing pressure plate; 51. First sealing layer; 6. Connecting bolt; 61. Bolt head; 62. Notch groove; 63. Polygonal boss; 64. Slot; 65. Threaded section; 66. Anti-slip groove; 7. Limiting ring; 71. Anti-rotation groove; 72. Polygonal through hole; 8. Second sealing layer. DETAILED DESCRIPTION

[0025] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," "horizontal," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "one," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0028] For the purpose of simplicity and illustration, the principles of the embodiments are described primarily with reference to examples. In the following description, many specific details are provided to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures are not described in detail to avoid unnecessarily obscuring the understanding of these embodiments. In addition, all embodiments may be used in combination with each other.

[0029] See also Figures 1 to 6 , the present invention provides a technical solution:

[0030] Embodiment 1, a sealing structure of a bolt-ball joint, includes: a connecting sphere 1 and a connecting bolt 6 .

[0031] Specifically, a connecting screw hole 11 is opened on the surface of the connecting sphere 1. A plurality of connecting screw holes 11 are provided and distributed on the surface of the connecting sphere 1. A hollow steel pipe rod 2 is provided on the outside of the connecting sphere 1.

[0032] Secondly, the end of the steel pipe rod 2 is fixedly connected with a cone head 3, the end of the cone head 3 is fixedly provided with a sleeve 4, and the end of the sleeve 4 is fixedly provided with a sealing pressure plate 5. The cross-sections of the cone head 3 and the sealing pressure plate 5 are both set to be arc-shaped. The inner wall of the sealing pressure plate 5 is bonded with a first sealing layer 51 and fits with the surface of the connecting sphere 1. Figure 2 and Figure 3 As shown, the sealing pressure plate 5 is opened outward, having a larger inner wall surface area. The first sealing layer 51 can be an annular rubber pad with a certain width, or a sealing member composed of multiple rubber sealing rings. When the sealing pressure plate 5 is pressed against the surface of the connecting ball 1, a better seal can be maintained between the sealing pressure plate 5 and the connecting ball 1.

[0033] Furthermore, the connecting bolt 6 is located in the inner cavity of the steel pipe rod 2, and one end of the connecting bolt 6 is provided with a threaded section 65. One end of the connecting bolt 6 passes through the sleeve 4 and is fixedly plugged into the inner cavity of the connecting screw hole 11. The other end of the connecting bolt 6 is provided with a bolt head 61. The cross section of the bolt head 61 is set to an arc shape that is adapted to the cone head 3, and a second sealing layer 8 is provided between the two. Figure 2 As shown, the threaded section 65 is fixed to the connecting screw hole 11 through a thread, the bolt head 61 applies an extrusion force to the inner wall of the cone head 3, and enables the sealing pressure plate 5 to press the surface of the connecting sphere 1, thereby ensuring the stability of the connection between the steel pipe rod 2 and the connecting sphere 1. The second sealing layer 8 is similar to the first sealing layer 51. It can be an annular rubber pad with a certain width, or it can be a seal composed of multiple rubber sealing rings. The difference between the second sealing layer 8 and the first sealing layer 51 is that the curvature of their cross-sections is different.

[0034] Example 2. Based on Example 1, in order to avoid dislocation of the second sealing layer 8, the present application also has a sealing groove 31 provided in an annular shape on the inner wall of the cone head 3, and an anti-slip groove 66 provided in an annular shape on the arc surface of the connecting bolt 6. The second sealing layer 8 is embedded in the inner cavity of the sealing groove 31 and corresponds to the anti-slip groove 66. Since the cross-sectional arc curvature of the cone head 3 and the bolt head 61 is relatively large, the sealing groove 31 and the anti-slip groove 66 are respectively used to limit the two sides of the second sealing layer 8 to avoid translation and dislocation of the second sealing layer 8.

[0035] Example 3, based on Example 2, in order to avoid bending and deformation of the sleeve 4, the cone head 3, sleeve 4 and sealing pressure plate 5 of the present application are integrally formed, and no additional gap is generated between the three, which reduces the difficulty of sealing. The outer wall of the sleeve 4 is fixedly connected with a plurality of reinforcing plates 41 distributed in an annular array, and the two ends of the reinforcing plate 41 are respectively fixedly connected to the outer wall of the cone head 3 and the outer wall of the sealing pressure plate 5, such as Figure 4 As shown, the reinforcement plate 41 is provided to improve the connection strength among the cone head 3, the sleeve 4 and the sealing pressure plate 5, and to prevent the sleeve 4 from being bent or even broken due to excessive local force caused by its own small diameter.

[0036] Embodiment 4, based on embodiment 3, the present application further has an annular flange provided on the outer side wall of the steel pipe rod 2, and friction grooves 22 are provided on the surface of the flange to facilitate the staff to twist and rotate the steel pipe rod 2.

[0037] Example 5, based on Example 4, in order to twist the connecting bolt 6, the present application also has a polygonal boss 63 fixedly connected to the end face of the bolt head 61, and a slot 64 is opened on the end face of the polygonal boss 63. The cross-sections of the polygonal boss 63 and the slot 64 are both regular hexagons, such as Figure 3 As shown, the worker can tighten the connecting bolt 6 by using an Allen wrench that is consistent with the size of the slot 64 .

[0038] Example 6. On the basis of Example 5, in order to tighten or loosen the connecting bolt 6, the present application further has a plurality of anti-rotation protrusions 32 distributed in a ring array fixedly connected to the inner side wall of the cone head 3, a limiting snap ring 7 is provided on the outer side of the polygonal boss 63, and a polygonal through hole 72 adapted to the polygonal boss 63 is provided in the middle of the limiting snap ring 7. The outer wall of the limiting snap ring 7 is fitted with the inner wall of the cone head 3, and the outer wall of the limiting snap ring 7 is provided with an anti-rotation groove 71 corresponding to the anti-rotation protrusion 32, as shown in FIG. Figure 5 and Figure 6 As shown, the limiting snap ring 7 can be sleeved on the outside of the polygonal boss 63 and remain relatively fixed with the polygonal boss 63, that is, the connecting bolt 6 is driven to rotate by rotating the limiting snap ring 7, as shown in FIG. Figure 3 and Figure 4As shown, when the limiting snap ring 7 is installed into the inner cavity of the cone head 3, the anti-rotation protrusion 32 will be stuck in the anti-rotation groove 71, so that the limiting snap ring 7 and the cone head 3 remain relatively fixed. Figure 2 After the installation is performed as shown, the staff can directly rotate the steel pipe rod 2, and can use the limiting clamping ring 7 to drive the connecting bolt 6 to rotate synchronously, thereby tightening or loosening the connecting bolt 6. The limiting clamping ring 7 and the polygonal boss 63 are fixed only by friction.

[0039] Example 7, based on Example 6, in order to ensure that the arc surface of the bolt head 61 can fit tightly with the inner wall of the cone head 3, the present application further has a plurality of cutout grooves 62 distributed in a circular array on the side of the bolt head 61, and the cutout grooves 62 correspond to the anti-rotation protrusions 32 and are flush with the anti-rotation grooves 71, such as Figure 6 As shown, the cutout groove 62 is provided to prevent the connecting bolt 6 from being stuck by the anti-rotation protrusion 32 during installation.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a bolt-ball joint, characterized by: include: A connecting sphere (1), wherein a connecting screw hole (11) is provided on the surface of the connecting sphere (1), and a hollow steel pipe rod (2) is provided on the outside of the connecting sphere (1); The end of the steel tube rod (2) is fixedly connected to a cone head (3), the end of the cone head (3) is fixedly provided with a sleeve (4), the end of the sleeve (4) is fixedly provided with a sealing pressure plate (5), the cross-sections of the cone head (3) and the sealing pressure plate (5) are both arranged to be arc-shaped, the inner wall of the sealing pressure plate (5) is bonded with a first sealing layer (51) and is in contact with the surface of the connecting sphere (1); A connecting bolt (6), the connecting bolt (6) being located in the inner cavity of the steel pipe rod (2), one end of the connecting bolt (6) being provided with a threaded section (65), one end of the connecting bolt (6) passing through the sleeve (4) and being plugged and fixed to the inner cavity of the connecting screw hole (11), the other end of the connecting bolt (6) being provided with a bolt head (61), the cross section of the bolt head (61) being provided in an arc shape adapted to the cone head (3), and a second sealing layer (8) being provided between the two; The inner side wall of the cone head (3) is fixedly connected to a plurality of anti-rotation protrusions (32) distributed in a ring array, the end face of the bolt head (61) is fixedly connected to a polygonal boss (63), a limit snap ring (7) is provided on the outer side of the polygonal boss (63), a polygonal through hole (72) adapted to the polygonal boss (63) is provided in the middle of the limit snap ring (7), the outer side wall of the limit snap ring (7) is fitted with the inner wall of the cone head (3), and an anti-rotation groove (71) corresponding to the anti-rotation protrusion (32) is provided on the outer side wall of the limit snap ring (7); The side surface of the bolt head (61) is provided with a plurality of cutout grooves (62) distributed in a ring array, and the cutout grooves (62) correspond to the anti-rotation protrusions (32) and are flush with the anti-rotation grooves (71).

2. The sealing structure of a bolt-ball joint according to claim 1, characterized in that: A sealing groove (31) is provided in an annular manner on the inner wall of the cone head (3), an anti-slip groove (66) is provided in an annular manner on the arc surface of the connecting bolt (6), and the second sealing layer (8) is embedded in the inner cavity of the sealing groove (31) and corresponds to the anti-slip groove (66).

3. The sealing structure of a bolt-ball joint according to claim 2, characterized in that: The cone head (3), sleeve (4) and sealing pressure plate (5) are integrally formed, and the outer wall of the sleeve (4) is fixedly connected to a plurality of reinforcing plates (41) distributed in a ring array, and the two ends of the reinforcing plates (41) are respectively fixedly connected to the outer wall of the cone head (3) and the outer wall of the sealing pressure plate (5).

4. The sealing structure of a bolt-ball joint according to claim 3, characterized in that: The outer side wall of the steel tube rod (2) is provided with an annular flange, and the surface of the flange is provided with friction lines (22).

5. The sealing structure of a bolt-ball joint according to claim 4, characterized in that: A slot (64) is provided on the end surface of the polygonal boss (63), and the cross-sections of the polygonal boss (63) and the slot (64) are both regular hexagonal.

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