Rigid polyurethane heat insulation pipeline with double-sealing structure

Abstract

The invention provides a rigid polyurethane heat insulation pipeline with a double-sealing structure, and relates to the field of pipelines. The middle of the top of the sealing connecting piece is rotationally connected with an adjusting knob, transmission shaft rods are transversely and rotationally connected into the sealing connecting piece on the left side and the right side of the adjusting knob, the tail ends of the transmission shaft rods are in threaded connection with sealing supporting assemblies, and the outer sides of the left end and the right end of the sealing connecting piece are in threaded connection with sealing nuts. Through the design of a double-sealing structure, a first sealing defensive line is formed by matching a sealing clamping groove in a connecting inserting groove in the side wall of a sealing connecting piece with a sealing clamping ring, and a second sealing defensive line is achieved through a sealing supporting assembly. The sealing and supporting assembly is driven to conduct radial supporting and sealing strengthening on the heat insulation pipeline, and the problems that pipeline sealing is poor, connection is not stable and heat insulation is poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipelines, and particularly to a rigid polyurethane heat-insulating pipeline with a double-sealing structure. Background Art

[0002] In industrial and civil fields, pipeline transportation is widely used in the transmission of fluids such as water, steam, petroleum, and natural gas. For fluid transportation that requires heat insulation, rigid polyurethane is widely used as a pipeline heat-insulating material due to its good heat-insulating performance, and is widely applied in industries such as petrochemical, construction, and food storage.

[0003] Based on the above, the existing sealed heat-insulating pipelines have the following deficiencies: The sealing structure at the pipeline connection is single, making it difficult to cope with pressure changes under complex working conditions, easily leading to medium leakage, causing resource waste and safety accidents, and also allowing external impurities to invade, affecting the purity of the medium and reducing the transportation efficiency. Moreover, the connection method lacks an effective support and adjustment mechanism. Under the action of vibration, external force impact, or thermal expansion and contraction, the connection is prone to loosening, affecting the reliability of the pipeline system. And the structural design defect causes it unable to effectively isolate heat transfer and cannot meet the strict requirements for the temperature stability of the medium in fields such as chemical engineering and heat supply. Summary of the Invention

[0004] The present invention relates to a rigid polyurethane heat-insulating pipeline with a double-sealing structure. Through the double-sealing structure design, the first seal line is composed of the cooperation between the seal slot in the side wall of the seal connector and the seal ring. The second seal line relies on the seal support assembly. Through the transmission mechanism composed of the adjustment knob and the transmission shaft rod, the seal support assembly is driven to radially support and strengthen the seal of the heat-insulating pipeline. At the same time, the inclined thread of the seal nut cooperates with the pre-filled elastic sealant to effectively fill the gap at the connection. The multiple-seal design greatly improves the sealing performance of the pipeline connection, preventing medium leakage and external impurity invasion.

[0005] The present invention provides a rigid polyurethane heat-insulating pipeline with a double-sealing structure, which specifically includes: a seal connector; heat-insulating pipelines are inserted at the left and right ends of the seal connector. An adjustment knob is rotatably connected to the middle of the top of the seal connector. A transmission shaft rod is horizontally rotatably connected in the seal connector on both sides of the adjustment knob. The end of the transmission shaft rod is threadedly connected to a seal support assembly. Seal nuts are threadedly connected to the outer sides of the left and right ends of the seal connector, and the inner wall of the seal nut is threadedly connected to the outer side wall of the seal connector in an inclined shape.

[0006] Further, the heat-insulating pipeline is composed of an insulating inner pipe and a protective outer pipe, and a rigid polyurethane heat-insulating layer is provided in the cavity between the insulating inner pipe and the protective outer pipe.

[0007] Further, two annular connection slots are provided in the left and right side walls of the sealing connector. Two sealing grooves are symmetrically provided in the side walls of the connection slots on the side close to the center of the left and right side walls of the sealing connector. A sealing ring is clamped in the sealing grooves. Four embedded grooves are arranged in a circular array on the left and right inner walls of the sealing connector.

[0008] Further, a circular concave adjustment opening is provided in the middle of the top of the sealing connector. A limiting groove is provided in the sealing connector at the bottom of the adjustment opening. A central connection shaft is fixedly installed on the inner wall of the sealing connector at the bottom of the adjustment opening. Transmission shaft rods are rotatably connected to the left and right side walls of the central connection shaft.

[0009] Further, the adjusting knob is in the shape of a regular hexagon. A large and a small limiting ring block are fixedly connected to the middle of the adjusting knob. The large limiting ring block is rotatably connected in the adjustment opening at the top of the sealing connector. The small limiting ring block is rotatably connected in the limiting groove at the bottom of the adjustment opening. The lowest end of the adjusting knob is fixedly connected to a driving bevel gear. The driving bevel gear is rotatably connected in the central connection shaft inside the sealing connector.

[0010] Further, two transmission shaft rods are symmetrically provided. Driven bevel gears are fixedly connected to the opposite ends of the two transmission shaft rods. The driven bevel gears are meshed with the driving bevel gear at the bottom end of the adjusting knob. External threads are provided on the outer side walls of the opposite ends of the two transmission shaft rods.

[0011] Further, the sealing support assembly is composed of two adjustment sliders, a transmission connecting rod and a sealing support block. Two symmetrical adjustment sliders are threadedly connected to the external threads at the ends of the transmission shaft rods. Four connection ends are arranged in a circular array on the outer side walls of the adjustment sliders. Transmission connecting rods are hinged on both sides of each connection end.

[0012] Further, the sealing support block is slidably connected in the embedded grooves on the inner wall of the sealing connector. A hinge connecting seat is fixedly connected to the side wall of the sealing support block facing the middle of the sealing connector. Two transmission connecting rods are symmetrically hinged on both the left and right sides of the hinge connecting seat.

[0013] The present invention provides a rigid polyurethane insulating pipe with a double-sealing structure, which has the following beneficial effects: 1. Through the double-sealing structure design, the first sealing line of defense is composed of the cooperation of the sealing grooves and the sealing rings in the connection slots on the side walls of the sealing connector. The second sealing line of defense is realized by relying on the sealing support assembly. Through the transmission mechanism composed of the adjusting knob and the transmission shaft rod, the sealing support assembly is driven to radially support and strengthen the seal of the insulating pipe. At the same time, the inclined threads of the sealing nut cooperate with the pre-filled elastic sealing glue, which can effectively fill the gaps at the joints. The multiple-sealing design greatly improves the sealing performance of the pipe connection and prevents the leakage of the medium and the intrusion of external impurities.

[0014] 2. The adiabatic pipeline adopts a structure with an insulated inner pipe, a protective outer pipe, and a rigid polyurethane adiabatic layer between the two, which can effectively reduce heat transfer, ensure the stability of the medium temperature inside the pipeline, reduce energy loss, and is suitable for conveying scenarios with high temperature control requirements.

[0015] 3. The connection slot of the sealing connector facilitates stable connection with the adiabatic pipeline. The embedded card slot provides a sliding track for the sealing support assembly. Together with the transmission system composed of components such as the adjustment knob and the transmission shaft rod, it can accurately achieve the support and sealing adjustment of the adiabatic pipeline, ensuring the stability and reliability of the connection structure.

[0016] 4. The adjustment knob is designed in a regular hexagon shape, which is convenient for operating with tools. The outer wall of the sealing nut is provided with anti-slip threads, which is convenient for the operator to tighten by hand or with tools. The entire installation process is simple and efficient, reducing the installation difficulty and labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0018] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0019] In the drawings: Figure 1 is an axonometric structural schematic diagram of a rigid polyurethane adiabatic pipeline with a double-sealing structure according to an embodiment of the present invention.

[0020] Figure 2 is an overall disassembled structural schematic diagram of a rigid polyurethane adiabatic pipeline with a double-sealing structure according to an embodiment of the present invention.

[0021] Figure 3 is an overall sectional structural schematic diagram of a rigid polyurethane adiabatic pipeline with a double-sealing structure according to an embodiment of the present invention.

[0022] Figure 4 is a sectional structural schematic diagram of a sealing connector of a rigid polyurethane adiabatic pipeline with a double-sealing structure according to an embodiment of the present invention.

[0023] Figure 5 is a disassembled structural schematic diagram of a transmission shaft rod, an adjustment slider, a transmission connecting rod, and a sealing support block of a rigid polyurethane adiabatic pipeline with a double-sealing structure according to an embodiment of the present invention.

[0024] Figure 6 is a front view sectional structural schematic diagram of a sealing connector of a rigid polyurethane adiabatic pipeline with a double-sealing structure according to an embodiment of the present invention before sectioning.

[0025] Figure 7It is a schematic cross-sectional axonometric view of a sealing connector of a rigid polyurethane insulating pipe with a double-sealing structure according to an embodiment of the present invention.

[0026] Figure 8 It is a schematic view of the connection structure of a drive shaft rod, an adjustment slider, a transmission link, and a sealing support block of a rigid polyurethane insulating pipe with a double-sealing structure according to an embodiment of the present invention.

[0027] List of reference numerals 1. Insulating pipe; 101. Isolated inner pipe; 102. Protective outer pipe; 2. Sealing connector; 201. Connection slot; 202. Embedded card slot; 203. Sealing card slot; 204. Central connection shaft; 205. Adjustment port; 206. Limit slot; 3. Adjusting knob; 301. Limit ring block; 302. Driving bevel gear; 4. Drive shaft rod; 401. Driven bevel gear; 402. Double-thread; 5. Adjustment slider; 501. Connection end; 6. Transmission link; 7. Sealing support block; 701. Hinge connecting seat; 8. Sealing snap ring; 9. Sealing nut. Detailed implementation manners

[0028] In order to make the purpose, scheme, and advantages of the technical scheme of the present invention clearer, the technical scheme of the embodiment of the present invention will be clearly and completely described below with reference to the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the ordinary meanings in the art. The same reference numerals in the drawings represent the same components.

[0029] Embodiment 1: Please refer to Figures 1 to 8 as shown in The present invention provides a rigid polyurethane insulating pipe with a double-sealing structure, including a sealing connector 2. The left and right ends of the sealing connector 2 are inserted with an insulating pipe 1. The middle of the top of the sealing connector 2 is rotatably connected with an adjusting knob 3. The drive shaft rod 4 is horizontally rotatably connected in the sealing connector 2 on the left and right sides of the adjusting knob 3. The end of the drive shaft rod 4 is threadedly connected with a sealing support assembly. The outer sides of the left and right ends of the sealing connector 2 are threadedly connected with a sealing nut 9. The inner wall of the sealing nut 9 is threadedly connected to the outer wall of the sealing connector 2 in an inclined shape. And the end face of the sealing nut 9 close to the insulating pipe 1 is provided with an annular sealing glue groove, and the sealing glue groove is pre-filled with elastic sealing glue. The outer wall of the sealing nut 9 is provided with anti-slip lines. Therefore, the inclined thread design enables the sealing nut 9 to generate an axial pressing force on the connection between the insulating pipe 1 and the sealing connector 2 during the tightening process. Cooperating with the elastic sealing glue in the sealing glue groove, it can effectively fill the tiny gaps at the connection, forming an additional sealing barrier. The anti-slip lines facilitate the operator to tighten the sealing nut 9 by hand or with tools, improving the installation convenience.

[0030] Among them, the adiabatic pipeline 1 is composed of an insulating inner pipe 101 and a protective outer pipe 102. A rigid polyurethane adiabatic layer is arranged in the cavity between the insulating inner pipe 101 and the protective outer pipe 102. Therefore, this structure enables the adiabatic pipeline 1 to have good heat insulation performance, effectively reducing heat transfer. At the same time, the protective outer pipe 102 can protect the internal structure from the external environment.

[0031] Among them, two annular connection slots 201 are opened in both the left and right side walls of the sealing connector 2. Two sealing grooves 203 are symmetrically opened in the side walls of the connection slots 201 near the center side of the left and right side walls of the sealing connector 2. A sealing ring 8 is clamped in the sealing grooves 203. Four embedded slots 202 are arranged in a circular array on the left and right inner walls of the sealing connector 2. Therefore, the connection slots 201 facilitate the stable connection with the adiabatic pipeline 1. The cooperation of the sealing grooves 203 and the sealing ring 8 forms the first sealing line of defense. The embedded slots 202 provide a sliding track for the sealing support assembly to ensure its stable movement.

[0032] Among them, a circular concave adjustment opening 205 is opened in the middle of the top of the sealing connector 2. A limiting groove 206 is opened in the sealing connector 2 at the bottom of the adjustment opening 205. A central connecting shaft 204 is fixedly installed on the inner wall of the sealing connector 2 at the bottom of the adjustment opening 205. Transmission shaft rods 4 are rotatably connected to the left and right side walls of the central connecting shaft 204. Therefore, the adjustment opening 205 and the limiting groove 206 play a role in limiting and supporting the adjusting knob 3 to ensure its stable rotation. The central connecting shaft 204 provides rotational support for the transmission shaft rods 4 to ensure stable power transmission.

[0033] Adopting the above technical solution, through reasonable structural design, the sealing connector 2 realizes stable connection with the adiabatic pipeline 1, provides a reliable support basis for the subsequent sealing adjustment mechanism, and initially constructs the structural framework of double sealing.

[0034] Among them, the adjusting knob 3 is in the shape of a regular hexagon. A large and a small limiting ring block 301 are fixedly connected to the middle of the adjusting knob 3. The large limiting ring block 301 is rotatably connected in the adjustment opening 205 at the top of the sealing connector 2. The small limiting ring block 301 is rotatably connected in the limiting groove 206 at the bottom of the adjustment opening 205. The lowest end of the adjusting knob 3 is fixedly connected to a driving bevel gear 302. The driving bevel gear 302 is rotatably connected in the central connecting shaft 204 inside the sealing connector 2. Therefore, the regular hexagon-shaped adjusting knob 3 is convenient for rotating operation with tools. The limiting ring blocks 301 ensure the stability of the adjusting knob 3 during rotation. The driving bevel gear 302 can convert the rotational motion into the lateral rotation of the transmission shaft rods 4 to achieve effective power transmission.

[0035] Among them, there are two symmetrically arranged drive shaft rods 4. At one end where the two drive shaft rods 4 face each other, a driven bevel gear 401 is fixedly connected. The driven bevel gear 401 is meshed and connected with the drive bevel gear 302 at the bottom end of the adjustment knob 3. On the outer side wall of the opposite ends of the two drive shaft rods 4, a double-thread 402 is provided. Therefore, through the meshing transmission of the bevel gears, the vertical rotational movement of the adjustment knob 3 is converted into the horizontal rotational movement of the drive shaft rods 4. The double-thread 402 enables the two adjustment sliders 5 to achieve synchronous movement towards or away from each other when the drive shaft rods 4 rotate.

[0036] Adopting the above technical solution, the transmission mechanism composed of the adjustment knob 3 and the drive shaft rod 4 can efficiently convert the manual rotational force into the linear movement of the seal support assembly, providing a reliable power transmission system for subsequent seal adjustment and making the seal operation more convenient and accurate.

[0037] Among them, the seal support assembly is composed of two adjustment sliders 5, transmission connecting rods 6 and a seal support block 7. The two symmetric adjustment sliders 5 are threadedly connected to the double-thread 402 at the end of the drive shaft rod 4. Four connecting ends 501 are arranged in a circular array on the outer side wall of the adjustment slider 5. On both sides of each connecting end 501, a transmission connecting rod 6 is hinged. Therefore, when the adjustment slider 5 moves on the double-thread 402, it can drive the transmission connecting rod 6 to move through the connecting end 501, providing power for the movement of the seal support block 7.

[0038] Among them, the seal support block 7 is slidably connected to the embedded slot 202 on the inner wall of the seal connector 2. A hinge connecting seat 701 is fixedly connected to the side wall of the seal support block 7 facing the middle of the seal connector 2. On the left and right sides of the hinge connecting seat 701, two transmission connecting rods 6 are symmetrically hinged. Therefore, the movement of the transmission connecting rod 6 can drive the seal support block 7 to slide in the embedded slot 202 on the inner wall of the seal connector 2, realizing the radial support and sealing effect on the heat-insulating pipe 1.

[0039] Adopting the above technical solution, the seal support assembly can, through the linkage of the adjustment slider 5, the transmission connecting rod 6 and the seal support block 7, radially support and strengthen the seal of the heat-insulating pipe 1 as needed, forming a second seal defense line, enhancing the sealing performance and stability of the pipe connection, and further improving the reliability of the entire pipe system.

[0040] Specific usage and functions of this embodiment: In the present invention, first, the pipeline is preliminarily connected and the first seal is constructed. The two ends of the adiabatic pipeline 1 are slowly and precisely inserted into the connection slots 201 at the left and right ends of the sealing connector 2 respectively, ensuring that the insertion is in place, so that the adiabatic pipeline 1 and the sealing connector 2 are closely fitted. During this process, the sealing grooves 203 on the left and right side walls of the sealing connector 2 near the center side will automatically engage with the pre-prepared sealing ring 8. Utilizing the elastic deformation characteristics of the sealing ring 8, the gap between the two is tightly filled to form the first seal line of defense, effectively blocking the intrusion of external media into the pipeline connection part. Next, the transmission adjustment and the second seal line of defense are constructed. Use a suitable tool to hold the regular hexagonal adjustment knob 3 and slowly rotate the adjustment knob 3 in the clockwise direction. The size limit ring block 301 in the middle of the adjustment knob 3 will stably rotate in the adjustment opening 205 at the top of the sealing connector 2 and the limit groove 206 at the bottom respectively, ensuring that the adjustment knob 3 does not shift or shake during the rotation process. The driving bevel gear 302 at the lowest end of the adjustment knob 3 rotates synchronously and meshes with the driven bevel gear 401 at one end of the transmission shaft rod 4. Through the transmission principle of bevel gears, the vertical rotational movement of the adjustment knob 3 is converted into the horizontal rotational movement of the transmission shaft rod 4. Since the double-thread 402 is provided on the outer side wall of the opposite end of the transmission shaft rod 4 and the two adjustment sliders 5 are threadedly connected to the double-thread 402, as the transmission shaft rod 4 rotates, the two adjustment sliders 5 will move synchronously towards or away from each other along the double-thread 402. The four connection ends 501 arranged in an annular array on the outer side wall of the adjustment slider 5 will drive the articulated transmission connecting rod 6 to move when the adjustment slider 5 moves, and the transmission connecting rod 6 will further drive the sealing support block 7 to slide smoothly in the embedded slot 202 on the inner wall of the sealing connector 2. Continuously rotate the adjustment knob 3 until the sealing support block 7 closely fits the inner wall of the adiabatic pipeline 1, providing radial support and seal reinforcement for the adiabatic pipeline 1 to form the second seal line of defense and further improving the sealing performance of the pipeline connection part.

[0041] Finally, the external sealing work is completed. Align the sealing nut 9 with the threads on the outer sides of the left and right ends of the sealing connector 2 and slowly screw it in. The inner wall of the sealing nut 9 is designed to be inclined. During the screwing process, this inclined thread structure will generate an axial pressing force on the connection between the adiabatic pipeline 1 and the sealing connector 2, making their connection tighter. At the same time, an elastic sealant is pre-filled in the annular sealant groove at the end face of the sealing nut 9 near the adiabatic pipeline 1. As the sealing nut 9 is tightened, the elastic sealant will be extruded and filled into the tiny gaps at the connection to form an additional sealing barrier.

[0042] The above description is only an exemplary embodiment of the present invention and is not used to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A rigid polyurethane insulated pipe with a double-sealing structure, characterized in that, It includes a sealing connector (2); heat-insulating pipes (1) are inserted at the left and right ends of the sealing connector (2). A regulating knob (3) is rotatably connected to the middle of the top of the sealing connector (2). A transmission shaft rod (4) is horizontally rotatably connected in the sealing connector (2) on both the left and right sides of the regulating knob (3). A sealing support assembly is threadedly connected to the end of the transmission shaft rod (4). Sealing nuts (9) are threadedly connected to the outer sides of the left and right ends of the sealing connector (2), and the inner wall of the sealing nut (9) is threadedly connected to the outer side wall of the sealing connector (2) in an inclined shape.

2. The rigid polyurethane heat-insulating pipe with a double-sealing structure according to claim 1, characterized in that, The heat-insulating pipe (1) is composed of an insulating inner pipe (101) and a protective outer pipe (102). A rigid polyurethane heat-insulating layer is arranged in the cavity between the insulating inner pipe (101) and the protective outer pipe (102).

3. The rigid polyurethane adiabatic pipeline with a double-sealing structure as described in claim 1, wherein, Two annular connection slots (201) are opened in both the left and right side walls of the sealing connector (2). Two sealing slots (203) are symmetrically opened in the side walls of the connection slots (201) near the center side of the left and right side walls of the sealing connector (2). A sealing ring (8) is clamped in the sealing slots (203). Four embedded slots (202) are arranged in a circular array on the left and right inner walls of the sealing connector (2).

4. The rigid polyurethane adiabatic pipeline with a double-sealing structure as described in claim 1, characterized in that, A circular concave adjustment opening (205) is opened in the middle of the top of the sealing connector (2). A limiting slot (206) is opened in the sealing connector (2) at the bottom of the adjustment opening (205). A central connecting shaft (204) is fixedly installed on the inner wall of the sealing connector (2) at the bottom of the adjustment opening (205). The transmission shaft rod (4) is rotatably connected in the left and right side walls of the central connecting shaft (204).

5. The rigid polyurethane insulating pipe with a double-sealing structure according to claim 1, characterized in that, The regulating knob (3) is in a regular hexagon shape. A large and a small limiting ring block (301) are fixedly connected to the middle of the regulating knob (3). The large limiting ring block (301) is rotatably connected in the adjustment opening (205) at the top of the sealing connector (2), and the small limiting ring block (301) is rotatably connected in the limiting slot (206) at the bottom of the adjustment opening (205). A driving bevel gear (302) is fixedly connected to the lowermost end of the regulating knob (3), and the driving bevel gear (302) is rotatably connected in the central connecting shaft (204) inside the sealing connector (2).

6. The rigid polyurethane insulating pipe with a double-sealing structure as described in claim 1, wherein, Two transmission shaft rods (4) are symmetrically provided. A driven bevel gear (401) is fixedly connected to the opposite ends of the two transmission shaft rods (4). The driven bevel gear (401) is meshed and connected with the driving bevel gear (302) at the bottom end of the regulating knob (3). A double-thread (402) is opened on the outer side wall of the opposite ends of the two transmission shaft rods (4).

7. The rigid polyurethane adiabatic pipeline with a double-sealing structure according to claim 1, wherein, The sealing support assembly is composed of two adjustment sliders (5), a transmission connecting rod (6), and a sealing support block (7). Two symmetrical adjustment sliders (5) are threadedly connected to the double-thread (402) at the end of the transmission shaft rod (4). Four connecting ends (501) are arranged in a circular array on the outer side wall of the adjustment slider (5). A transmission connecting rod (6) is hinged on both sides of each connecting end (501).

8. The rigid polyurethane insulating pipe with a double-sealing structure as claimed in claim 7, wherein The sealed support block (7) is slidably connected to an embedded card slot (202) on the inner wall of the sealed connecting piece (2). A hinge connecting seat (701) is fixedly connected to the side wall of the sealed support block (7) facing the middle of the sealed connecting piece (2). Two transmission connecting rods (6) are symmetrically hinged on both the left and right sides of the hinge connecting seat (701).

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