High-pressure manifold connecting structure

Abstract

The utility model relates to the technical field of high-pressure manifolds, in particular to a high-pressure manifold connecting structure which comprises a first pipe body, a second pipe body, an inserting pipe, a sealing assembly and a limiting assembly, and the inserting pipe is fixedly communicated with one side of the second pipe body; the sealing assembly is arranged in the middle of the insertion pipe and used for sealing work between the two pipelines after the second pipe body and the first pipe body are installed, and adaptation can be conducted according to the installation progress; the limiting assembly is arranged on one side of the second pipe body and used for limiting work between the two pipelines after the second pipe body and the first pipe body are installed. Compared with the prior art, the problems that in an existing connecting mode, the connecting efficiency is low, the sealing failure risk is high, and the dismounting and mounting efficiency is low are solved.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure manifold technology, and in particular to a high-pressure manifold connection structure. Background Technology

[0002] High-pressure manifolds are pipeline systems used to transport high-pressure media, widely applied in oil and gas extraction, chemical pressurization and transportation, and hydraulic control. In high-pressure environments, the sealing and stability of pipeline connections are crucial. Currently, common high-pressure manifold connection structures often employ threaded connections, flanged connections, or quick couplings. However, these methods still have shortcomings in terms of connection efficiency, sealing reliability, and resistance to shock and pressure. While threaded connections are reliable, the installation process is cumbersome and requires high operational precision; flanged connections require numerous bolts for fixing, making operation difficult when installation space is limited; quick couplings, while convenient, have a complex structure and are susceptible to loosening or leakage due to high-pressure pulses or vibrations.

[0003] In the prior art, Chinese patent document CN221075630U, concerning a high-pressure manifold connection structure, proposes a method to quickly fix and statically seal two high-pressure pipe bodies through mechanical connection by setting up a C-shaped fixing bracket, connecting plate, bolts, screws, and silicone C-shaped sealing ring. Simultaneously, an external anti-scalding insulation layer and a wear-resistant protective layer are applied to enhance weather resistance and safety. The overall structure relies on rigid connectors for assembly and sealing, suitable for conventional high-pressure pipeline connections, and possesses a certain installation efficiency and basic protection capability. However, in practical applications, this technical solution suffers from drawbacks: the sealing structure is rigid and cannot automatically adapt to tolerances; the connection process requires manual operation with tools, resulting in low installation efficiency; furthermore, it lacks effective limiting and buffering mechanisms, exhibiting weak impact and vibration resistance, making it unsuitable for frequent disassembly and assembly or high-dynamic operating conditions. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a high-pressure manifold connection structure to solve the problems of low connection efficiency, high risk of sealing failure, and low disassembly and assembly efficiency in the existing connection methods.

[0005] To achieve the above objectives, this utility model provides a high-pressure manifold connection structure, including a first pipe body, a second pipe body, an insertion pipe, a sealing assembly, and a limiting assembly, wherein the insertion pipe is fixedly connected to one side of the second pipe body;

[0006] A sealing assembly is disposed in the middle of the insertion tube and is used to seal the two pipes after the second pipe body and the first pipe body are installed. It can be adapted according to the installation progress.

[0007] A limiting component is disposed on one side of the second pipe body and is used to limit the movement between the two pipes after the second pipe body and the first pipe body are installed.

[0008] Preferably, the sealing assembly includes an expansion ring, which is fixedly installed at the middle position of the insertion tube. Multiple movable rods are disposed inside the expansion ring. A pressure block is fixedly installed at one end of each movable rod. A movable ring is sleeved on the movable rod, and two first connecting rods are rotatably installed on the movable ring. A fixing block is fixedly installed inside the expansion ring, and the bottom of the fixing block is fixedly connected to the insertion tube. The movable rod passes through the fixing block and is slidably connected to it. A second connecting rod is rotatably installed on the fixing block, and the midpoints of the first and second connecting rods are rotatably connected. A connecting ring is fixedly installed at the end of the movable rod away from the pressure block, and a connecting ring is fixedly installed on the side of the connecting ring away from the movable rod. A second telescopic rod is fixedly installed, with its other side fixedly connected to the second pipe body. A second spring is sleeved on the outer side of the second telescopic rod, with one end of the second spring fixedly connected to the connecting ring and the other end of the second spring fixedly connected to the inner wall of the second pipe body. First limiting blocks are fixedly installed on both sides of the connecting ring. A first telescopic rod is fixedly installed on one side of the first limiting block, with the other side of the first telescopic rod fixedly connected to the second pipe body. A first spring is sleeved on the outer side of the first telescopic rod, with one end of the first spring fixedly connected to the first limiting block and the other end of the first spring fixedly connected to the second pipe body. The first limiting block is slidably installed on one side of the second pipe body.

[0009] Preferably, the limiting component includes two second limiting blocks, which are fixedly installed on the second tube body near the first tube body. The first tube body has multiple limiting grooves, which cooperate with the first limiting block and the second limiting block. A limiting ring is fixedly installed inside the first tube body.

[0010] Preferably, the length of the first limiting block is greater than the length of the second limiting block.

[0011] Preferably, the expansion ring is an elastic element, and the inner wall of the expansion ring is rotatably connected to the side of the second connecting rod away from the fixed block.

[0012] Preferably, the movable rod, the pressing block, the moving ring, the first connecting rod, the fixing block, and the second connecting rod are all housed inside the expansion ring. The movable rod passes through the insertion tube and is slidably connected to the insertion tube. The connecting ring is housed in the side wall of the second tube body, and the side of the connecting ring is fixed to the bottom of the first limiting block.

[0013] Preferably, the limiting groove is a limiting groove that is wider on the inner side and narrower on the outer side, and the first limiting block and the second limiting block are T-shaped block parts, and the limiting groove cooperates with the first limiting block and the second limiting block.

[0014] Preferably, the insertion tube has an arc-shaped edge on the side near the first tube body, and the diameter of the insertion tube is the same as the inner diameter of the limiting ring.

[0015] The beneficial effects of this utility model are:

[0016] 1. This high-pressure manifold connection structure uses an expansion ring sealing assembly driven by an insertion pipe and multiple rods as its core. During insertion, the structure's own movement drives the movable rods and pressure blocks to expand the expansion ring, achieving radial active sealing as the insertion depth changes. The expansion ring is an elastic element that can automatically adapt to changes in the pipe's inner diameter and axial displacement, providing continuous and uniform sealing force. Compared to traditional O-rings or static seals, this structure has stronger self-adaptability and tolerance compensation capabilities, which not only improves sealing reliability but also reduces dependence on manufacturing precision.

[0017] 2. This high-pressure manifold connection structure, through the "T-shaped interlock" between the first limiting block, the second limiting block and the limiting groove, combined with the elastic telescopic rod and spring buffer structure, automatically achieves limiting and locking after insertion, preventing the connection from loosening or falling off due to high-pressure impact or vibration, ensuring structural stability. After the limiting block is inserted, it can be rotated to further enhance the limiting effect, achieving multi-directional stable locking. It has good resistance to axial pull-out force and rotation, significantly improving the overall connection safety and reliability of repeated use. Attached Figure Description

[0018] 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 only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of part of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of some internal parts of the structure of this utility model;

[0022] Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0023] The diagram is marked as follows:

[0024] 1. First tube body; 2. Second tube body; 3. Limiting groove; 4. Insertion tube; 5. Expansion ring; 6. Limiting ring; 7. First limiting block; 8. Second limiting block; 9. Movable rod; 10. Compression block; 11. Moving ring; 12. First connecting rod; 13. Fixing block; 14. Second connecting rod; 15. First telescopic rod; 16. First spring; 17. Connecting ring; 18. Second telescopic rod; 19. Second spring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0026] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figures 1 to 4 As shown, a high-pressure manifold connection structure includes a first pipe body 1, a second pipe body 2, an insertion pipe 4, a sealing assembly, and a limiting assembly. The insertion pipe 4 is fixedly connected to one side of the second pipe body 2.

[0028] Furthermore, such as Figures 1 to 4As shown, the sealing assembly, located in the middle of the insertion tube 4, is used for sealing the two pipes after the second tube body 2 and the first tube body 1 are installed. It can be adapted according to the installation progress. It includes an expansion ring 5, which is fixedly installed in the middle of the insertion tube 4. Multiple movable rods 9 are provided inside the expansion ring 5. A pressure block 10 is fixedly installed at one end of each movable rod 9. A moving ring 11 is sleeved on the movable rod 9, and two first connecting rods 12 are rotatably installed on the moving ring 11. A fixing block 13 is fixedly installed inside the expansion ring 5. The bottom of the fixing block 13 is fixedly connected to the insertion tube 4. The movable rods 9 pass through the fixing block 13 and slide in a slidable connection with it. A second connecting rod 14 is rotatably installed on the fixing block 13. The rod 12 is rotatably connected to the midpoint of the second connecting rod 14. A connecting ring 17 is fixedly installed on the end of the movable rod 9 away from the pressing block 10. A second telescopic rod 18 is fixedly installed on the side of the connecting ring 17 away from the movable rod 9. The other side of the second telescopic rod 18 is fixedly connected to the second tube body 2. A second spring 19 is sleeved on the outside of the second telescopic rod 18. One end of the second spring 19 is fixedly connected to the connecting ring 17, and the other end of the second spring 19 is fixedly connected to the inner wall of the second tube body 2. A first limiting block 7 is fixedly installed on both sides of the connecting ring 17. A first telescopic rod 15 is fixedly installed on one side of the first limiting block 7. The other side of the first telescopic rod 15 is fixedly connected to the second tube body 2. A first limiting block 7 is sleeved on the outside of the first telescopic rod 15. Spring 16, one end of the first spring 16 is fixedly connected to the first limiting block 7, and the other end of the first spring 16 is fixedly connected to the second tube 2. The first limiting block 7 is slidably installed on one side of the second tube 2. The length of the first limiting block 7 is greater than the length of the second limiting block 8. The length of the first limiting block 7 being longer than the second limiting block 8 is the stroke of the first telescopic rod 15 and the second telescopic rod 18. The expansion ring 5 is an elastic element. The inner wall of the expansion ring 5 is rotatably connected to the side of the second connecting rod 14 away from the fixed block 13. The movable rod 9, the pressing block 10, the moving ring 11, the first connecting rod 12, the fixed block 13, and the second connecting rod 14 are all accommodated inside the expansion ring 5. The movable rod 9 passes through the insertion tube 4 and is slidably connected to the insertion tube 4. The connecting ring 17 is housed within the side wall of the second tube body 2. The side of the connecting ring 17 is fixed to the bottom of the first limiting block 7. The expansion ring 5 and the multi-rod structure achieve automatic compression sealing. The movable rod 9 radially presses the compression block 10. The expansion ring 5 is driven to unfold through the linkage of the moving ring 11, the first connecting rod 12, and the second connecting rod 14. The expansion ring 5 is an elastic element that expands under force in the inserted state, actively conforming to the tube wall. It has strong adaptability and can adjust the sealing pressure according to the insertion depth and axial displacement. It is more flexible than traditional O-rings or simple compression structures and allows for a certain degree of manufacturing error. The first limiting block 7 has a long stroke and provides the power source for the sealing assembly through the elastic telescopic rod. The first telescopic rod 15, the second telescopic rod 18, and the spring structure have buffering and self-resetting functions, preventing hard contact or structural impact during insertion and removal operations.After insertion, it automatically maintains the optimal position, improving connection stability. The multi-bar linkage mechanism has automatic mechanical response characteristics. During insertion, as the insertion depth changes, the structure automatically triggers sealing and limiting actions, requiring no additional manual intervention or complex control systems, facilitating on-site operation. In use, the insertion tube 4 is first fixedly connected to one side of the second tube body 2, before the first tube body 1 is inserted. The expansion ring 5 is in a naturally contracted state, and the internal movable rod 9, pressure block 10, moving ring 11, first connecting rod 12, and second connecting rod 14 are not driven. The first limiting block 7 is connected to the second tube body 2 via the first telescopic rod 15 and the first spring 16, maintaining initial tension. The second telescopic rod 18 and the second spring 19... Connected between the connecting ring 17 and the second tube 2, and in the released state, the operator pushes the insertion tube 4 axially into the first tube 1. As the insertion depth increases, the first limiting block 7 is compressed, causing the connecting ring 17 to pull the movable rod 9 inward. The second telescopic rod 18 is compressed, causing the second spring 19 to store energy. The first limiting block 7 also slides during the compression stroke, and the first spring 16 is gradually compressed. The pressing block 10 drives the movable rod 9 to move radially inward. The moving ring 11 moves with the movable rod 9 and drives the first connecting rod 12 to rotate. The first connecting rod 12 is linked with the second connecting rod 14, causing the expansion ring 5 to expand radially. The expansion ring 5 fits between the inner wall of the first tube 1 and the outer wall of the insertion tube 4, achieving an active seal.

[0029] Furthermore, such as Figures 1 to 3As shown, a limiting assembly is located on one side of the second pipe body 2, used for limiting the distance between the two pipes after the second pipe body 2 and the first pipe body 1 are installed. It includes two second limiting blocks 8, which are fixedly installed on the second pipe body 2 near the first pipe body 1. The first pipe body 1 has multiple limiting grooves 3, which cooperate with the first limiting blocks 7 and the second limiting blocks 8. A limiting ring 6 is fixedly installed inside the first pipe body 1. The limiting grooves 3 are wider on the inner side and narrower on the outer side. The first limiting blocks 7 and the second limiting blocks 8 are T-shaped blocks, and the limiting grooves 3 cooperate with them. The insertion tube 4 has an arc-shaped edge on the side near the first pipe body 1. The diameter of the insertion tube 4 is consistent with the inner diameter of the limiting ring 6. The second limiting block 8 is fixedly installed on the second tube body 2, and cooperates with the first limiting block 7 to form a double limiting, enhancing the structure's impact resistance. The limiting groove 3 set inside the first tube body 1 closely cooperates with the T-shaped first limiting block 7 and the second limiting block 8 to form a clear mechanical stop, preventing the insertion tube 4 from coming out due to high pressure or vibration. The limiting groove 3 is designed as a "wide inside and narrow outside" T-shaped structure, which helps the first limiting block 7 and the second limiting block 8 to automatically align and snap into place after smooth insertion, without the need for high-precision docking. It can be firmly embedded in the limiting groove 3, with a simple structure but reliable locking, large tolerance, and convenient installation. Multiple limiting grooves 3 are set on the first tube body 1 to accommodate different The insertion tube 4, with its adjustable installation direction and depth, adapts to different site conditions, improving connection flexibility. The arc-shaped edge design on the side of the insertion tube 4 closest to the first tube body 1 matches the inner diameter of the limiting ring 6, acting as a guide during insertion, reducing eccentricity and scratches, and protecting the sealing components from damage. The natural transition of the arc-shaped edge facilitates a uniform contact surface when the expansion ring 5 fits against the inner wall, enhancing sealing integrity. In use, before connecting the first tube body 1 to the second tube body 2, the insertion tube 4 is already fixedly connected to one side of the second tube body 2. The expansion ring 5, the first limiting block 7, the second limiting block 8, and other structures are all in their initial reset state. The front end of the insertion tube 4 has an arc-shaped edge that matches the inner diameter of the limiting ring 6 inside the first tube body 1. For easy insertion guidance, the operator pushes the second tube 2 towards the first tube 1. The arc-shaped edge of the insertion tube 4 is guided within the limiting ring 6, allowing the insertion tube 4 to smoothly enter the interior of the first tube 1. The expansion ring 5, as an elastic element, is actively expanded to adaptively fit the tube wall and provide a stable sealing force. The first limiting block 7 and the second limiting block 8 are inserted into the limiting groove 3 of the first tube 1 in sequence and rotated clockwise. The T-shaped structure and the "wide inside and narrow outside" structure of the limiting groove 3 interlock to achieve limiting and fixing. After the insertion tube 4 is inserted to the specified depth and rotated, the limiting block and the limiting groove 3 achieve final engagement, and the connection is completed. When disassembly is required, the second tube 2 is rotated in the opposite direction and pulled, and the insertion tube 4 is removed from the first tube 1 to complete the disassembly.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0031] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-pressure manifold connection structure characterized by comprising: include: The system comprises a first tube (1), a second tube (2), an insertion tube (4), a sealing assembly, and a limiting assembly, wherein the insertion tube (4) is fixedly connected to one side of the second tube (2); A sealing assembly is provided in the middle of the insertion tube (4) for sealing the two pipes after the second pipe body (2) and the first pipe body (1) are installed. It can be adapted according to the installation progress. A limiting component is provided on one side of the second pipe body (2) for limiting the distance between the two pipes after the second pipe body (2) and the first pipe body (1) are installed.

2. A high pressure manifold connection structure according to claim 1, wherein The sealing assembly includes an expansion ring (5), which is fixedly installed in the middle of the insertion tube (4). Multiple movable rods (9) are arranged inside the expansion ring (5). A pressure block (10) is fixedly installed at one end of each movable rod (9). A moving ring (11) is sleeved on the movable rod (9). Two first connecting rods (12) are rotatably installed on the moving ring (11). A fixing block (13) is fixedly installed inside the expansion ring (5). The bottom of the fixing block (13) is fixedly connected to the insertion tube (4). The movable rod (9) passes through the fixing block (13) and is slidably connected to it. A second connecting rod (14) is rotatably installed on the fixing block (13). The first connecting rod (12) and the second connecting rod (14) are rotatably connected at their midpoints. A connecting ring (17) is fixedly installed at the end of the movable rod (9) away from the pressure block (10). A connecting ring (17) is fixedly installed at the end of the connecting ring (17) away from the movable rod (9). A second telescopic rod (18) is fixedly installed on one side of the tube (2), and the other side of the second telescopic rod (18) is fixedly connected to the second tube (2). A second spring (19) is sleeved on the outside of the second telescopic rod (18). One end of the second spring (19) is fixedly connected to the connecting ring (17), and the other end of the second spring (19) is fixedly connected to the inner wall of the second tube (2). A first limiting block (7) is fixedly installed on both sides of the connecting ring (17). A first telescopic rod (15) is fixedly installed on one side of the first limiting block (7). The other side of the first telescopic rod (15) is fixedly connected to the second tube (2). A first spring (16) is sleeved on the outside of the first telescopic rod (15). One end of the first spring (16) is fixedly connected to the first limiting block (7), and the other end of the first spring (16) is fixedly connected to the second tube (2). The first limiting block (7) is slidably installed on one side of the second tube (2).

3. A high pressure manifold connection structure according to claim 2, wherein The limiting component includes two second limiting blocks (8), which are fixedly installed on the second tube body (2) on the side close to the first tube body (1). The first tube body (1) has multiple limiting grooves (3), which are used in conjunction with the first limiting block (7) and the second limiting block (8). A limiting ring (6) is fixedly installed inside the first tube body (1).

4. A high pressure manifold connection structure according to claim 3, wherein The length of the first limiting block (7) is greater than the length of the second limiting block (8).

5. The high pressure manifold connection structure of claim 3, wherein The expansion ring (5) is an elastic element, and the inner wall of the expansion ring (5) is rotatably connected to the side of the second connecting rod (14) away from the fixed block (13).

6. The high pressure manifold connection structure of claim 3, wherein The movable rod (9), the pressing block (10), the moving ring (11), the first connecting rod (12), the fixing block (13), and the second connecting rod (14) are all housed inside the expansion ring (5). The movable rod (9) passes through the insertion tube (4) and is slidably connected to the insertion tube (4). The connecting ring (17) is housed in the side wall of the second tube body (2), and the side of the connecting ring (17) is fixed to the bottom of the first limiting block (7).

7. The high pressure manifold connection structure of claim 3, wherein The limiting groove (3) is a limiting groove with a wider inner side and a narrower outer side. The first limiting block (7) and the second limiting block (8) are T-shaped block parts. The limiting groove (3) cooperates with the first limiting block (7) and the second limiting block (8).

8. The high pressure manifold connection structure of claim 3, wherein The insertion tube (4) has an arc-shaped edge on the side close to the first tube body (1), and the diameter of the insertion tube (4) is the same as the inner diameter of the limiting ring (6).

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