A multi-layer sealed hydraulic flange joint

Abstract

The utility model relates to a multilayer sealed hydraulic flange joint belonging to the field of hydraulic transmission technology, which comprises a joint mechanism, a sealing mechanism and a connecting bolt, wherein the joint mechanism comprises a first flange plate and a second flange plate; the sealing mechanism comprises an outer sealing ring, an inner sealing block, a universal ball hinge and a reset assembly; when the two flange plates are not parallel or are deflected due to machining, installation or system vibration, the inner sealing block is no longer a rigid whole but can independently rotate and float in a small range under the permission of the universal ball hinge, and its inclination and position can be adjusted in real time to ensure that each inner sealing block can be uniformly and closely attached to the relative sealing groove wall surface. Thus, the problem of leakage caused by local pressure concentration and local gap under the deflection condition of the traditional integral sealing ring can be avoided, and the reliability of the sealing element of the flange joint can be improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic transmission technology, and in particular to a multi-layer sealing hydraulic flange joint. Background Technology

[0002] In hydraulic transmission and control systems, flange joints, as core components of pipeline connections, play a crucial role in transmitting high-pressure hydraulic media and ensuring the system's sealing performance. Their sealing reliability directly determines the operational stability, safety, and service life of the hydraulic system, and they are widely used in fields such as engineering machinery, aerospace, petrochemicals, and marine power. With the development of hydraulic systems towards higher pressure, integration, and larger scale, the sealing requirements for flange joints are becoming increasingly stringent. To address the problem of leakage caused by wear, aging, or localized pressure concentration in traditional single-layer sealing structures under high-pressure conditions, the industry has gradually developed multi-layer sealing structures.

[0003] However, in actual installation and use, due to factors such as pipeline processing errors, installation space limitations, system vibration deformation, and assembly operation precision, the two mating flanges of the flange joint often cannot achieve a completely parallel fit. When the flange is misaligned, the clamping force of different areas of the flange sealing surface on the sealing element is significantly different, and a gap appears between the sealing element on one side and the flange sealing surface, directly destroying the sealing effect, thus resulting in poor reliability of the flange joint sealing element. Utility Model Content

[0004] Therefore, it is necessary to provide a multi-layer sealing hydraulic flange joint to address the problem that when the flange is misaligned, the clamping force on the sealing element in different areas of the flange sealing surface is significantly different, and a gap appears between the sealing element on one side and the flange sealing surface, which directly destroys the sealing effect and leads to poor reliability of the sealing element.

[0005] A multi-layer sealing hydraulic flange joint includes: a joint mechanism, the joint mechanism including a first flange, a second flange and a connecting bolt, wherein the first flange and the second flange are connected by the connecting bolt; A sealing mechanism, comprising an outer sealing ring, an inner sealing block, a universal ball joint, and a reset assembly for resetting the inner sealing block; Several sets of the inner sealing block and the universal ball joint are provided. The inner side of the first flange is provided with a universal ball joint corresponding to the outer sealing ring and the inner sealing block. The inner sealing block is rotatably disposed inside the outer sealing ring through the universal ball joint.

[0006] In one embodiment, the universal ball joint is disposed between the outer sealing ring and the inner sealing block, and the outer arc surface of the inner sealing block is provided with two sets of reset components distributed symmetrically about the universal ball joint.

[0007] In one embodiment, the reset assembly includes a mounting block, a compression spring, and a connecting post. Two sets of the compression spring and the connecting post are provided. The compression spring is located on both sides of the mounting block, and the mounting block is rotatably mounted inside the outer sealing ring via the connecting post.

[0008] In one embodiment, the inner side of the outer sealing ring is provided with a movable groove corresponding to the mounting block, and the movable groove is a trapezoidal groove with the bottom surface near the inner sealing block.

[0009] In one embodiment, the outer sealing ring has a reset groove inside that corresponds to the compression spring, and the movable groove is connected to the corresponding reset groove.

[0010] In one embodiment, the inner side of the outer sealing ring is provided with a connecting groove corresponding to the ball joint seat, and the ball joint is disposed inside the connecting groove.

[0011] In one embodiment, the universal ball joint head is disposed on the outer arc surface of the inner sealing block via a connecting rod, and several sets of the inner sealing blocks are in contact with each other.

[0012] In one embodiment, one side of the outer sealing ring and the inner sealing block contacts the inner wall of the sealing groove, and the other side of the outer sealing ring contacts the inner side of the second flange.

[0013] Beneficial effects 1. The aforementioned multi-layer sealing hydraulic flange joint connects the inner sealing block assembly via a universal ball joint. When the two flanges are not parallel or undergo relative deflection due to processing, installation, or system vibration, the inner sealing blocks are no longer a rigid whole. Instead, allowed by the universal ball joint, they independently rotate and float slightly, adjusting their tilt angle and position in real time to ensure that each inner sealing block maintains a uniform and tight fit with the opposite sealing groove wall. This avoids the leakage problems caused by local pressure concentration and gaps in traditional integral sealing rings under skewed conditions, thereby improving the reliability of the flange joint sealing element.

[0014] 2. In the above-mentioned multi-layer sealing hydraulic flange joint, the outer sealing ring serves as the main seal, providing basic sealing; the second seal is composed of several sets of inner sealing blocks. With the cooperation of the mounting block, compression spring, and connecting column, when the internal pressure of the flange fluctuates or instantaneous high pressure occurs, the pressure acting on the inner sealing blocks can be buffered and absorbed by the compression spring, avoiding damage to the sealing pair due to hard impact, thereby improving the stability of the flange joint sealing element. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the overall structure of this utility model; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the overall structure of this utility model; Figure 5 This is a cross-sectional view of the sealing mechanism of this utility model.

[0017] Reference numerals: 100, joint mechanism; 200, sealing mechanism; 101, first flange; 102, second flange; 103, sealing groove; 104, connecting bolt; 201, outer sealing ring; 202, inner sealing block; 203, universal ball joint; 204, mounting block; 205, compression spring; 206, connecting column; 207, movable groove; 208, connecting groove; 209, reset groove. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] The following is combined Figures 1-5 This invention describes a multi-layer sealing hydraulic flange joint.

[0020] In one embodiment, a multi-layer sealing hydraulic flange joint includes: a joint mechanism 100, which includes a first flange 101, a second flange 102, and a connecting bolt 104, wherein the first flange 101 and the second flange 102 are connected by the connecting bolt 104; and a sealing mechanism 200, which includes an outer sealing ring 201, an inner sealing block 202, a universal ball joint 203, and a reset assembly for resetting the inner sealing block 202; one side of the outer sealing ring 201 and the inner sealing block 202 contacts the inner wall of the sealing groove 103, and the other side of the outer sealing ring 201 contacts the inner side of the second flange 102. In this embodiment, the outer sealing ring 201 serves as the static primary seal. Under the pre-tightening force of the connecting bolt 104, it undergoes initial compression with the sealing groove 103, forming the first line of defense. The inner sealing block 202 serves as the dynamic secondary seal. Its contact with the inner side of the second flange 102 is floating, laying the foundation for subsequent adaptive adjustment.

[0021] Such as 2 and Figure 3 As shown, the inner sealing block 202 and the universal ball joint 203 are both provided in several sets. The inner side of the first flange 101 is provided with a universal ball joint 203 corresponding to the outer sealing ring 201 and the inner sealing block 202. The inner sealing block 202 is rotatably disposed inside the outer sealing ring 201 through the universal ball joint 203. The universal ball joint 203 is disposed between the outer sealing ring 201 and the inner sealing block 202. The outer arc surface of the inner sealing block 202 is provided with two sets of reset components distributed symmetrically about the universal ball joint 203. The inner side of the outer sealing ring 201 is provided with a connecting groove 208 corresponding to the ball seat of the universal ball joint 203, and the universal ball joint 203 is disposed inside the connecting groove 208. The ball head of the universal ball joint 203 is disposed on the outer arc surface of the inner sealing block 202 through a connecting rod. Several sets of inner sealing blocks 202 are in contact with each other. In this embodiment, the inner sealing ring is designed to consist of multiple independent inner sealing blocks 202, which are connected to the outer sealing ring 201 via a universal ball joint 203. Each inner sealing block 202 is an independent sealing unit, capable of multi-angle deflection via the universal ball joint 203 to accommodate flange misalignment; it can also float slightly radially along the center of the ball joint. The mutual contact between adjacent inner sealing blocks 202 ensures that the continuity of the entire inner ring seal is not disrupted when they adjust their respective positions, preventing the formation of leakage channels. The connecting groove 208 ensures the stable installation of the ball seat of the universal ball joint 203, providing a stable fulcrum for the entire sealing element.

[0022] like Figure 2 , Figure 3 and Figure 5As shown, the reset assembly includes a mounting block 204, a compression spring 205, and a connecting post 206. Two sets of compression springs 205 and two sets of connecting posts 206 are provided. The compression springs 205 are located on both sides of the mounting block 204. The mounting block 204 is rotatably mounted inside the outer sealing ring 201 via the connecting post 206. An active groove 207 corresponding to the mounting block 204 is provided on the inner side of the outer sealing ring 201. The active groove 207 is a trapezoidal groove with its bottom surface near the inner sealing block 202. A reset groove 209 corresponding to the compression spring 205 is provided inside the outer sealing ring 201. The active groove 207 communicates with the corresponding reset groove 209. In this embodiment, the mounting block 204 is hinged to the movable groove 207 via the connecting post 206, and compression springs 205 are arranged below both ends of the mounting block 204. When the inner sealing block 202 is subjected to uneven pressure from the second flange 102, the force is transmitted to one end of the mounting block 204 through the universal ball joint 203, forcing the mounting block 204 to rotate around the connecting post 206, thereby compressing the spring at that end, while the compression spring 205 at the other end is stretched or held. The trapezoidal structure of the movable groove 207 limits the swing range of the mounting block 204 and provides stable guidance. When the external force changes or disappears, the compressed spring releases energy, pushing the mounting block 204 to rotate in the opposite direction, pushing the inner sealing block 202 back to its initial equilibrium position, thereby avoiding the problem of leakage caused by local pressure concentration and local gaps in traditional integral sealing rings under skewed conditions, and thus improving the reliability of the flange joint sealing element.

[0023] Working Principle: During assembly, tightening the connecting bolt 104 pulls the first flange 101 and the second flange 102 together, compressing the outer sealing ring 201 within the sealing groove 103. Simultaneously, the inner end face of the second flange 102 presses against all the inner sealing blocks 202. Under normal conditions, each inner sealing block 202 is evenly stressed, and the reset assembly is in a balanced state. When the flange becomes misaligned, the end face of the second flange 102 is no longer parallel to the sealing surface, resulting in greater pressure on one side of the inner sealing block 202 and less pressure on the other side. On the side with greater pressure, the inner sealing block 202 deflects through the universal ball joint 203, pushing the corresponding mounting block 204 to compress the spring on that side, thus absorbing excessive pressure and preventing damage to the sealing material from excessive compression. On the side with less pressure, under the action of the reset spring, the mounting block 204 pushes the inner sealing block 202 outward, pressing it tightly against the second flange 102, thereby maintaining an effective seal and improving the reliability of the flange joint sealing element.

[0024] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-layer sealing hydraulic flange joint, characterized in that, include: A joint mechanism (100) includes a first flange (101), a second flange (102), and a connecting bolt (104), wherein the first flange (101) and the second flange (102) are connected by the connecting bolt (104); A sealing mechanism (200) includes an outer sealing ring (201), an inner sealing block (202), a universal ball joint (203), and a reset assembly for resetting the inner sealing block (202); The inner sealing block (202) and the universal ball joint (203) are provided in several sets. The inner side of the first flange (101) is provided with a universal ball joint (203) corresponding to the outer sealing ring (201) and the inner sealing block (202). The inner sealing block (202) is rotatably disposed inside the outer sealing ring (201) through the universal ball joint (203).

2. The multi-layer sealing hydraulic flange joint according to claim 1, characterized in that, The universal ball joint (203) is disposed between the outer sealing ring (201) and the inner sealing block (202). The outer arc surface of the inner sealing block (202) is provided with two sets of reset components distributed with the universal ball joint (203) as the axis of symmetry.

3. The multi-layer sealing hydraulic flange joint according to claim 1, characterized in that, The reset assembly includes a mounting block (204), a compression spring (205), and a connecting post (206). Two sets of compression springs (205) and connecting posts (206) are provided. The compression springs (205) are located on both sides of the mounting block (204). The mounting block (204) is rotatably mounted inside the outer sealing ring (201) via the connecting post (206).

4. The multi-layer sealing hydraulic flange joint according to claim 3, characterized in that, The outer sealing ring (201) has an inner side with a movable groove (207) corresponding to the mounting block (204). The movable groove (207) is a trapezoidal groove with the bottom surface on the side closest to the inner sealing block (202).

5. The multi-layer sealing hydraulic flange joint according to claim 4, characterized in that, The outer sealing ring (201) has a reset groove (209) inside that corresponds to the compression spring (205), and the movable groove (207) is connected to the corresponding reset groove (209).

6. The multi-layer sealing hydraulic flange joint according to claim 1, characterized in that, The outer sealing ring (201) has a connecting groove (208) on its inner side that corresponds to the ball seat of the universal ball joint (203), and the universal ball joint (203) is located inside the connecting groove (208).

7. The multi-layer sealing hydraulic flange joint according to claim 1, characterized in that, The ball head of the universal ball joint (203) is set on the outer arc surface of the inner sealing block (202) through a connecting rod, and several sets of the inner sealing blocks (202) are in contact with each other.

8. The multi-layer sealing hydraulic flange joint according to claim 1, characterized in that, The outer sealing ring (201) and the inner sealing block (202) are in contact with the inner wall of the sealing groove (103) on one side, and the outer sealing ring (201) is in contact with the inner side of the second flange (102) on the other side.

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