Connector butt joint device for high-pressure pipeline

Abstract

The utility model relates to the technical field of interface butt joint for high-pressure pipelines, in particular to an interface butt joint device for high-pressure pipelines, which comprises a first connecting pipe, a second connecting pipe is arranged at the connecting end of the first connecting pipe, and auxiliary sealing components are mounted on the first connecting pipe and the second connecting pipe. The sealing device is characterized in that the auxiliary sealing assembly comprises inner side sealing rings, the connecting ends of the first connecting pipe and the second connecting pipe are provided with the inner side sealing rings, the outer sides of the inner side sealing rings are sleeved with outer side sealing rings, and pressure reduction grooves are formed in the conic surface intersection positions of the inner side sealing rings and the outer side sealing rings; and auxiliary locking devices are mounted on the first connecting flange plate and the second connecting flange plate. Through cooperative operation of the auxiliary sealing assembly and the auxiliary locking device, pressure compensation is achieved, the butt joint device can adapt to the pipeline vibration working condition, abrasion between structures can be automatically compensated, the phenomenon of looseness between the sealing structures is avoided, and the sealing performance of the butt joint device is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure pipeline interface butt joint technical field, specifically, a high pressure pipeline interface butt joint device. BACKGROUND

[0002] In the process of installing high pressure pipeline, the butt joint device is used to connect two pipelines to ensure the smooth operation of the whole pipeline network.

[0003] After searching, the pipe connecting device with patent number (CN217328978U) is disclosed, which records "including first clamping piece, second clamping piece, rubber ring, the rubber ring is provided with a contact piece, the contact piece is located on the inner side of the ring surface of the foot ring, and the contact piece has two pieces, one end of each contact piece is fixed at the end edge of the rubber ring, the two contact pieces are axially symmetrically distributed, and the contact piece is integrally formed with the rubber ring, the first clamping piece and the second clamping piece are detachably matched together, the rubber ring is located between the first clamping piece and the second clamping piece, and the rubber ring is tightly attached to the first clamping piece and the second clamping piece. The utility model has the following beneficial effects: the first clamping piece, the second clamping piece and the rubber ring are used to clamp and seal two pipes, and the disassembly and assembly are convenient";

[0004] The above-mentioned patent still has some shortcomings in actual use. The sealing effect is not good in the prior art, and the local elastic deformation will cause the surface of the sealing structure to be uneven, which cannot adapt to the pipeline vibration working condition. In addition, with the long-time operation of the butt joint device, some wear phenomena will occur between the locking structure parts. The gap caused by wear will affect the sealing effect.

[0005] Therefore, the utility model discloses a high pressure pipeline interface butt joint device. Utility model content

[0006] To address the problems mentioned in the background art, such as poor sealing performance during operation, uneven sealing surface due to localized elastic deformation, inability to adapt to pipeline vibration conditions, and wear between locking components during prolonged operation of the docking device, which affects the sealing effect, this utility model provides a high-pressure pipeline interface docking device. It includes a first connecting pipe, a second connecting pipe at the connecting end of the first connecting pipe, and auxiliary sealing components installed on both the first and second connecting pipes. The auxiliary sealing component includes an inner sealing ring, and both the connecting ends of the first and second connecting pipes are... An inner sealing ring is provided, and an outer sealing ring is sleeved on the outer side of the inner sealing ring. The outer sealing ring completely covers the outer circumference of the inner sealing ring. The inner and outer sealing rings are coaxially fitted to form a sealing body. The axial cross-sections of the inner and outer sealing rings have double slopes. The cone angle of the inner sealing ring is greater than that of the outer sealing ring. A pressure-reducing groove is provided at the intersection of the cone surfaces of the inner and outer sealing rings. A first connecting flange is installed near the connection port of the first connecting pipe, and a second connecting flange is installed near the connection port of the second connecting pipe. An auxiliary locking device is installed on the first and second connecting flanges.

[0007] As a further improvement to this technical solution, the auxiliary locking device includes a fixing ring. The fixing ring is fixedly connected to the outer surface of the first connecting flange away from the second connecting flange. Fixing seats are symmetrically fixedly connected to the upper and lower positions of the fixing ring. Each fixing seat has a fixing cavity inside. Each fixing cavity has an insertion hole on the inner wall surface near the first connecting flange, and the insertion hole penetrates the body of the first connecting flange. Insertion rods are symmetrically fixedly connected to the upper and lower positions of the second connecting flange near the structural surface of the first connecting flange. Each insertion rod can pass through the insertion hole and be inserted into the interior of the fixing cavity.

[0008] As a further improvement to this technical solution, a push rod is provided on one side of each fixed seat through a sliding hole. One end of the push rod is inserted into the interior of the fixed cavity and connected to a spring. The end of the spring is connected to a locking block. A limiting slide rod is fixedly attached to the structural surface of the locking block near the push rod, and the limiting slide rod is inserted into the limiting hole of the push rod. A pre-tightening slot is provided on the side of the insertion rod near the locking block. After the insertion rod enters the fixed cavity to the maximum extent, the locking block can be locked inside the pre-tightening slot.

[0009] As a further improvement to this technical solution, the other end of the push rod extends outward and is fixedly connected to a push plate. A screw is rotatably installed at the middle position of the push plate. One end of the screw is rotatably connected to a fixed ring, and the other end of the screw extends through the push plate and is fitted with a rotary knob.

[0010] As a further improvement to this technical solution, the spring does not deform when it is not in operation, and when the push plate is furthest from the fixed seat, the working position of the locking block intersects with the movement trajectory of the insertion rod.

[0011] As a further improvement to this technical solution, a protective shell is installed on the fixed base. The shell of the protective shell is divided into three parts, and their cross-sectional radii increase sequentially. After the second connecting flange of the first connecting flange is installed, the shell of the protective shell can completely cover the second connecting flange.

[0012] Compared with existing technologies, the beneficial effects of this utility model are:

[0013] 1. In this high-pressure pipeline interface docking device, pressure compensation is achieved through the cooperation of auxiliary sealing components and conical surface cooperation, which can adapt to pipeline vibration conditions and achieve a further sealing effect when the pressure continues to rise.

[0014] 2. In this high-pressure pipeline interface docking device, with the cooperation of an auxiliary locking device, when wear occurs between the locking structural components, the wear between the structures can be automatically compensated, avoiding loosening between the sealing structures, achieving the effect of auxiliary pre-tightening, and ensuring the sealing performance of the docking device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the auxiliary sealing assembly of this utility model;

[0017] Figure 3 This is a schematic cross-sectional view of the fixed cavity in this utility model.

[0018] Figure 4 This is a structural diagram showing the locking position of the insertion rod and the locking block in this practical application.

[0019] The meanings of the labels in the diagram are as follows:

[0020] 1. First connecting pipe; 2. Second connecting pipe; 3. Inner sealing ring; 4. Outer sealing ring; 5. Pressure relief groove; 6. First connecting flange; 7. Second connecting flange; 8. Fixing ring; 9. Fixing seat; 10. Fixing cavity; 11. Insertion hole; 12. Insertion rod; 13. Pre-tightening groove; 14. Push rod; 15. Spring; 16. Locking block; 17. Pushing piece; 18. Screw; 19. Rotary knob; 20. Protective shell. Detailed Implementation

[0021] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Therefore, this utility model provides an interface connection device for high-pressure pipelines. (See also...) Figures 1-2 As shown, it includes a first connecting pipe 1, a second connecting pipe 2 at the connecting end of the first connecting pipe 1, an auxiliary sealing assembly installed on the first connecting pipe 1 and the second connecting pipe 2, the auxiliary sealing assembly including an inner sealing ring 3, an inner sealing ring 3 at the connecting end of the first connecting pipe 1 and the second connecting pipe 2, an outer sealing ring 4 sleeved on the outer side of the inner sealing ring 3, the outer sealing ring 4 completely covering the outer circumference of the inner sealing ring 3, the inner sealing ring 3 and the outer sealing ring 4 coaxially fitted to form a sealing body, the axial cross sections of the inner sealing ring 3 and the outer sealing ring 4 have double slopes, the cone angle of the inner sealing ring 3 is greater than the cone angle of the outer sealing ring 4, a pressure-reducing groove 5 is opened at the intersection of the cone surfaces of the inner sealing ring 3 and the outer sealing ring 4, a first connecting flange 6 is installed near the connecting port of the first connecting pipe 1, a second connecting flange 7 is installed near the connecting port of the second connecting pipe 2, and an auxiliary locking device is installed on the first connecting flange 6 and the second connecting flange 7. The inner sealing ring 3 is a hard metal seal, and the outer sealing ring 4 is a soft elastomer seal. The ring body of the outer sealing ring 4 can cover the connection gap between the inner sealing ring 3 and the corresponding pipe body. The ring body of the inner sealing ring 3 protrudes from the ring body of the outer sealing ring 4. When under pressure, the inner sealing ring 3 bears the pressure first, thus preventing the outer sealing ring 4 from aging prematurely.

[0023] During operation, through the structural design of the auxiliary sealing assembly, when the first connecting pipe 1 and the second connecting pipe 2 are connected to each other, an inner sealing ring 3 is set at the port of the first connecting pipe 1 and the second connecting pipe 2. Then, an outer sealing ring 4 is sleeved on the outside of the inner sealing ring 3. When the first connecting pipe 1 is close to the second connecting pipe 2, the inner sealing rings 3 first come into contact with each other. When the pipeline vibrates, the inner sealing rings 3 are compressed and the outer sealing rings 4 come into contact with each other. As the pressure continues to increase, the conical surface between the inner sealing ring 3 and the outer sealing ring 4 achieves pressure compensation. With the cooperation of the pressure-reducing groove 5, it can adapt to the pipeline vibration condition and ensure the sealing performance when connecting the pipeline.

[0024] Further, see Figures 1-4As shown, the auxiliary locking device includes a retaining ring 8. The retaining ring 8 is fixedly attached to the outer surface of the first connecting flange 6 away from the second connecting flange 7. Retaining seats 9 are symmetrically fixed above and below the retaining ring 8. Each retaining seat 9 has a retaining cavity 10 inside. Each retaining cavity 10 has an insertion hole 11 on its inner wall surface near the first connecting flange 6, and the insertion hole 11 penetrates the body of the first connecting flange 6. Insertion rods 12 are symmetrically fixed above and below the structural surface of the second connecting flange 7 near the first connecting flange 6. Each insertion rod 12 can pass through the insertion hole 11 and be inserted into the interior of the retaining cavity 10. When the first connecting pipe 1 and the second connecting pipe 2 are connected, the first connecting flange 6 and the second connecting flange 7 are brought close together. The insertion rod 12 on the second connecting flange 7 passes through the insertion hole 11 on the first connecting flange 6 and is inserted into the retaining cavity 10, achieving an auxiliary positioning effect and facilitating the installation of bolts and other connecting structures.

[0025] Each fixed base 9 has a push rod 14 installed on one side via a sliding hole. One end of the push rod 14 is inserted into the interior of the fixed cavity 10 and connected to a spring 15. The end of the spring 15 is connected to a locking block 16. A limiting slide rod is fixed to the structural surface of the locking block 16 near the push rod 14, and the limiting slide rod is inserted into the limiting hole of the push rod 14. A pre-tightening groove 13 is opened on the side of the insertion rod 12 near the locking block 16. After the insertion rod 12 enters the fixed cavity 10 to the maximum extent, the locking block 16 can be locked inside the pre-tightening groove 13. The push rod 14 can move along the sliding hole on the fixed base 9, causing the working position of the locking block 16 to change. When the spring 15 is compressed, the distance between the locking block 16 and the push rod 14 shortens along the axis.

[0026] The other end of the push rod 14 extends outward and is fixedly connected to a push plate 17. A screw 18 is rotatably mounted at the middle of the push plate 17. One end of the screw 18 is rotatably connected to the fixing ring 8, and the other end of the screw 18 extends through the push plate 17 and is fitted with a rotary knob 19. When a rotational force is applied to the rotary knob 19, the screw 18 rotates, and the push plate 17 pushes the push rod 14 to move towards the fixed seat 9, thereby adjusting the working position of the locking block 16.

[0027] When the spring 15 is not in operation, it does not deform. When the push plate 17 is furthest from the fixed seat 9, the working position of the locking block 16 intersects with the movement trajectory of the insertion rod 12. During the process of inserting the rod 12 into the fixed cavity 10 through the insertion hole 11, the rod 12 will first contact the vertical inclined surface of the locking block 16. As the rod 12 continues to move, the locking block 16 is pushed in the direction of the push rod 14, causing the locking block 16 to move a certain distance towards the push rod 14. The spring 15 will be compressed and generate a reaction force, causing the locking block 16 to always press tightly against the rod 12. After the rod 12 has entered the fixed cavity 10 to its maximum extent, the locking block 16 will be locked in the opening of the pre-tightening slot 13 under the reaction force of the spring 15. Subsequently, the screw 18 can be rotated by turning the knob 19 to apply a rotational force, causing the push plate 17 to push the push rod 14 to move towards the locking block 16. The spring 15 is further compressed and the reaction force increases, causing the locking block 16 to be tightly pressed against the inside of the pre-tightening slot 13. When wear occurs between the locking structure components, an automatic compensation effect can be achieved, ensuring the sealing of the docking device.

[0028] A protective shell 20 is installed on the fixed base 9. The shell of the protective shell 20 is divided into three parts, and their cross-sectional radii increase sequentially. After the first connecting flange 6 and the second connecting flange 7 are installed, the shell of the protective shell 20 can completely cover the second connecting flange 7. A force can be applied to the shell with the largest cross-sectional radius in the protective shell 20, so that the protective shell 20 can surround and cover the outside of the first connecting flange 6 and the second connecting flange 7, thus achieving the effect of protecting the docking device during operation.

[0029] During operation, thanks to the structural design of the auxiliary locking device, when the first connecting pipe 1 and the second connecting pipe 2 are connected via the first connecting flange 6 and the second connecting flange 7, the insertion rod 12 on the second connecting flange 7 enters the fixed cavity 10 through the insertion hole 11. During this process, the insertion rod 12 first contacts the vertical inclined surface of the locking block 16. As the insertion rod 12 continues to move, the locking block 16 receives a pushing force towards the push rod 14, causing the locking block 16 to move a certain distance towards the push rod 14. The spring 15 is compressed and generates a reaction force, causing the locking block 16 to move further towards the push rod 14. Block 16 is always pressed tightly against the insertion rod 12. After the insertion rod 12 enters the fixed cavity 10 to the maximum extent, the locking block 16 will be locked in the opening of the pre-tightening slot 13 under the reaction force of the spring 15. Subsequently, the screw 18 can be rotated by turning the knob 19 to apply a rotational force, so that the push plate 17 pushes the push rod 14 to the position of the locking block 16. The spring 15 is further compressed and the reaction force increases, so that the locking block 16 is tightly attached to the inside of the pre-tightening slot 13. When wear occurs between the locking structure components, it can achieve the effect of automatic compensation and ensure the sealing of the docking device.

[0030] In summary, this effectively solves the problems of poor sealing performance, uneven sealing surface caused by local elastic deformation, inability to adapt to pipeline vibration conditions, and wear between locking components due to prolonged operation of the docking device, which can affect the sealing performance.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present utility have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present utility, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-pressure pipeline interface docking device, comprising a first connecting pipe (1), a second connecting pipe (2) being provided at the connecting end of the first connecting pipe (1), and auxiliary sealing components being installed on the first connecting pipe (1) and the second connecting pipe (2), characterized in that: The auxiliary sealing assembly includes an inner sealing ring (3). The connecting ends of the first connecting pipe (1) and the second connecting pipe (2) are both provided with inner sealing rings (3). An outer sealing ring (4) is sleeved on the outer side of the inner sealing ring (3). The outer sealing ring (4) completely covers the outer circumference of the inner sealing ring (3). The inner sealing ring (3) and the outer sealing ring (4) are coaxially fitted to form a sealing body. The axial cross sections of the inner sealing ring (3) and the outer sealing ring (4) have double slopes. The cone angle of the inner sealing ring (3) is greater than the cone angle of the outer sealing ring (4). A pressure-reducing groove (5) is provided at the junction of the cone surfaces of the inner sealing ring (3) and the outer sealing ring (4). A first connecting flange (6) is installed near the connecting port of the first connecting pipe (1). A second connecting flange (7) is installed near the connecting port of the second connecting pipe (2). An auxiliary locking device is installed on the first connecting flange (6) and the second connecting flange (7).

2. The interface docking device for high-pressure pipelines according to claim 1, characterized in that: The auxiliary locking device includes a fixing ring (8). The fixing ring (8) is fixedly connected to the outer side of the first connecting flange (6) away from the second connecting flange (7). The fixing ring (8) is symmetrically fixedly connected to the upper and lower positions of the fixing seat (9). Each fixing seat (9) has a fixing cavity (10) inside. Each fixing cavity (10) has an insertion hole (11) on the inner wall surface near the first connecting flange (6). The insertion hole (11) penetrates the body of the first connecting flange (6). The second connecting flange (7) has an insertion rod (12) symmetrically fixedly connected to the upper and lower positions of the structural surface near the first connecting flange (6). Each insertion rod (12) can pass through the insertion hole (11) and be inserted into the interior of the fixing cavity (10).

3. The interface docking device for high-pressure pipelines according to claim 2, characterized in that: Each of the fixed seats (9) has a push rod (14) provided on one side through a sliding hole. One end of the push rod (14) is inserted into the interior of the fixed cavity (10) and connected to a spring (15). The end of the spring (15) is connected to a locking block (16). The locking block (16) is fixed to a limiting slide rod on the structural surface near the push rod (14), and the limiting slide rod is inserted into the limiting hole of the push rod (14). The side of the insertion rod (12) near the locking block (16) is provided with a pre-tightening groove (13). After the insertion rod (12) enters the fixed cavity (10) to the maximum extent, the locking block (16) can be locked inside the pre-tightening groove (13).

4. The interface docking device for high-pressure pipelines according to claim 3, characterized in that: The other end of the push rod (14) extends outward and is fixedly connected to the push plate (17). A screw (18) is rotatably installed in the middle of the push plate (17). One end of the screw (18) is rotatably connected to the fixing ring (8). The other end of the screw (18) extends through the push plate (17) and is fitted with a rotating knob (19).

5. A high-pressure pipeline interface connection device according to claim 4, characterized in that: When the spring (15) is not in operation, it does not deform. When the push plate (17) is furthest from the fixed seat (9), the working position of the locking block (16) intersects with the movement trajectory of the insertion rod (12).

6. A high-pressure pipeline interface docking device according to claim 2, characterized in that: A protective shell (20) is installed on the fixed seat (9). The shell of the protective shell (20) is divided into three parts, and their cross-sectional radii increase sequentially. After the second connecting flange (7) of the first connecting flange (6) is installed, the shell of the protective shell (20) can completely cover the second connecting flange (7).

Images