A high-low temperature cycle device pipeline connection structure

Abstract

The utility model relates to circulating device technical field discloses a high and low temperature circulating device pipeline connection structure, including device main body, connecting assembly and pipeline, device main body back is equipped with fixed assembly, connecting assembly is inserted in fixed assembly, and the pipeline connection department is equipped with fixed head, fixed tooth, first fixed ring, sealing ring and annular groove, and fixed tooth passes through first fixed ring and sealing ring and is clamped into annular groove, and the pipeline department is equipped with fixed bolt, fixed sheet and gasket still, and fixed bolt passes through fixed sheet and gasket and is connected with the pipeline threadedly, the utility model discloses through the swivel conical surface to promote the lock and seize connecting assembly, realizes quick butt joint and automatic compensation thermal stress, and cooperation pipeline department's rotary clamping tooth and bolt compression double locking structure, effectively solved the problem that the connection loosens and leaks under high and low temperature environment and dismounts complicatedly, has improved the sealing property and maintenance convenience of connection obviously.

Description

Technical Field

[0001] This utility model relates to the field of circulation device technology, and in particular to a pipeline connection structure for a high and low temperature circulation device. Background Technology

[0002] High and low temperature circulating systems are widely used in chemical, pharmaceutical, and materials testing fields for precise temperature control of reaction vessels or testing equipment. Their working principle typically involves a circulating pump driving the heat transfer medium to circulate between the main unit and external equipment. The piping connection structure, as a critical link in media delivery, directly affects the operational safety and efficiency of the entire system due to its sealing performance and connection stability.

[0003] However, existing high and low temperature circulation systems have significant shortcomings in pipeline connections. Traditional connection methods mostly use standard flat flange bolt connections or simple threaded direct connections. During operation, the medium temperature frequently switches between extremely high (e.g., above 200°C) and extremely low (e.g., below -40°C) temperatures. This drastic temperature change causes significant thermal expansion and contraction effects on pipelines and connections. Under long-term operation, ordinary threaded connections are prone to loosening due to thermal stress fatigue, leading to media leakage, wasting resources, and potentially causing safety accidents. Furthermore, existing connection structures often require the removal of numerous bolts using various tools during equipment maintenance or pipeline replacement. This cumbersome, time-consuming, and labor-intensive process fails to meet the rapid maintenance needs of modern laboratories or factories.

[0004] Therefore, this utility model proposes a pipeline connection structure for a high and low temperature circulation device to overcome the shortcomings of the prior art. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a pipeline connection structure for a high and low temperature circulation device, aiming to improve the problems of poor sealing reliability, easy loosening and leakage due to thermal expansion and contraction in the pipeline connection structure of the high and low temperature circulation device in the prior art, as well as the cumbersome connection and disassembly process and low maintenance efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a pipeline connection structure for a high and low temperature circulation device, comprising: a device body, and a connecting component that is plugged into the device body, wherein the connecting component is connected to a pipeline; A fixing component is fixedly installed on the back of the main body of the device. The connecting component is inserted into the interior of the fixing component. The connection of the pipeline is provided with a fixing head, fixing teeth, a first fixing ring, a sealing ring, and an annular groove. The annular groove is opened on the docking end face of the pipeline. The first fixing ring and the sealing ring are sleeved on the outer wall of the end of the pipeline. The fixing head is sleeved on the outer periphery of the pipeline. The fixing teeth are fixedly installed on the bottom inner wall of the fixing head. The fixing teeth pass through the first fixing ring and the sealing ring and rotate into the interior of the annular groove. The connection of the pipeline is also provided with a fixing bolt, a fixing plate, a gasket and a second fixing ring. The second fixing ring is fixedly connected to the top outer side of the fixing head. The fixing bolt passes through the fixing plate and the gasket and is threadedly connected to the connecting flange of the pipeline.

[0007] Preferably, the fixing component includes a connecting block, a threaded post, a swivel, and a locker. The connecting block is fixedly installed on the surface of the device body, the threaded post is fixedly connected to the outside of the connecting block, and the swivel is sleeved on the outer periphery of the connecting component and threadedly connected to the threaded post.

[0008] Preferably, the locking device is movably disposed inside the threaded column, and the inner wall of the rotating ring is provided with a conical surface, which abuts against the outer end of the locking device. The rotating ring, by rotating, uses the conical surface to push the locking device to move axially along the threaded column.

[0009] Preferably, the inner wall of the swivel ring is provided with a threaded groove, which is adapted to the external thread of the threaded post, and the connecting assembly passes through the swivel ring and the locking device and extends into the interior of the connecting block.

[0010] Preferably, the inner wall of the fixing tooth is in contact with the outer wall of the first fixing ring and the sealing ring, and the fixing head drives the fixing tooth to move along the circumferential direction of the annular groove by rotation to achieve clamping.

[0011] Preferably, the fixing plate is located outside the gasket, the head of the fixing bolt abuts against the surface of the fixing plate, and the fixing plate presses the gasket tightly under the tightening action of the fixing bolt.

[0012] Preferably, the second fixing ring is disposed around the upper part of the fixing head, and the second fixing ring is used to limit the axial displacement of the fixing head.

[0013] Preferably, the gasket has a cylindrical structure, the fixing piece has a circular structure, and the gasket is sleeved on the outer periphery of the pipeline connection part.

[0014] This utility model has the following beneficial effects: 1. In this utility model, a fixing component is set at the docking point of the connecting component and the main body of the device. The conical surface of the inner wall of the rotating ring cooperates with the threaded propulsion structure to push the locking device to move along the axial direction of the threaded column and retract to lock the connecting component. This solves the problem of easy loosening and leakage at the pipeline connection due to the alternating thermal expansion and contraction of high and low temperatures in the prior art, as well as the defect of cumbersome disassembly and assembly of traditional flanges. It achieves the effects of rapid docking, automatic compensation of thermal stress, and stable and high sealing connection.

[0015] 2. This utility model solves the problem of insufficient sealing reliability of a single connection method under high pressure or high and low temperature environments by adopting a rotating snap-fit ​​structure with fixed teeth and annular grooves at the pipe connection end, and supplementing it with fixing bolts to apply axial pressure to the gasket through fixing plates. It achieves the effects of multiple locking, preventing accidental detachment and significantly improving sealing performance. Attached Figure Description

[0016] Figure 1 This is a perspective view of the pipeline connection structure of a high and low temperature circulation device proposed in this utility model; Figure 2 This is a cross-sectional schematic diagram of the connecting components of a pipeline connection structure for a high and low temperature circulation device proposed in this utility model. Figure 3 for Figure 2 Explosion diagram at point A; Figure 4 This is a cross-sectional schematic diagram of the fixing component of the pipeline connection structure of a high and low temperature circulation device proposed in this utility model; Figure 5 This is an exploded view of the connecting components of a pipeline connection structure for a high and low temperature circulation device proposed in this utility model.

[0017] Legend: 1. Main body of the device; 2. Connecting components; 3. Piping; 4. Fixing components; 301. Fixing bolts; 302. Fixing plates; 303. Gaskets; 304. Fixing heads; 305. Fixing teeth; 306. First fixing ring; 307. Sealing ring; 308. Annular groove; 309. Second fixing ring; 401. Rotary ring; 402. Threaded groove; 403. Conical surface; 404. Threaded column; 405. Connecting block; 406. Locking device. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1-5 This utility model provides a pipeline connection structure for a high and low temperature circulation device, which aims to solve the problems of the pipeline of the high and low temperature circulation device in the prior art being prone to loosening of the connection due to thermal expansion and contraction under extreme hot and cold alternating environments, resulting in medium leakage, as well as the structural defects of traditional connection structures, such as cumbersome disassembly and assembly, and inconvenience for quick maintenance and repair.

[0020] The high and low temperature circulation device pipeline connection structure includes a device body 1 and a connecting component 2 that is plugged into the back of the device body 1. The other end of the connecting component 2 is connected to a pipeline 3. The device body 1 serves as the core control and medium storage unit of the entire high and low temperature circulation system. The device body 1 is responsible for heating or cooling the medium and outputting it. The connecting component 2 serves as an intermediate bridge for the flow of the medium. The connecting component 2 connects the device body 1 with the external circulation pipeline 3. The pipeline 3 is used to guide the medium to the target area or complete the circulation return.

[0021] A fixing component 4 is fixedly installed at the lower back of the main body 1. The fixing component 4 is located at the medium inlet and outlet of the main body 1. One end of the connecting component 2 is inserted into the inside of the fixing component 4. The locking force provided by the fixing component 4 makes the connecting component 2 and the main body 1 form a sealed and stable connection. The other end of the connecting component 2 is connected to the pipeline 3. This segmented connection design allows the device to be disassembled in sections when the pipeline 3 needs to be replaced or cleaned, without having to disassemble the entire system on a large scale, thereby improving the maintenance efficiency of the equipment. Furthermore, the main body 1, the connecting component 2, and the pipeline 3 all adopt an enhanced sealing fit design to adapt to the pressure fluctuations and temperature changes generated by the high and low temperature media during circulation, and to prevent leakage at the connection.

[0022] The connection of the pipe 3 is provided with a fixing head 304, fixing teeth 305, a first fixing ring 306, a sealing ring 307, an annular groove 308, a fixing bolt 301, a fixing plate 302, a gasket 303, and a second fixing ring 309. The annular groove 308 is formed at the docking end face of the pipe 3. The annular groove 308 is distributed in a circumferential shape on the inner side or end face of the port of the pipe 3. The first fixing ring 306 and the sealing ring 307 are sequentially sleeved on the outer wall of the docking end of the pipe 3. The first fixing ring 306 is located outside the sealing ring 307 to provide rigid support. The sealing ring 307 is in close contact with the surface of the pipe 3 to provide a sealing function. The fixing head 304 is sleeved on the outer periphery of the pipe 3 and located outside the first fixing ring 306. The fixing teeth 305 are integrally formed or fixedly set on the bottom inner wall of the fixing head 304. The shape and size of the fixing teeth 305 are designed to pass through the notches or gaps reserved on the first fixing ring 306 and the sealing ring 307.

[0023] During assembly, the fixing tooth 305 first passes through the first fixing ring 306 and the sealing ring 307, and then enters the inner area of ​​the annular groove 308. By rotating the fixing head 304, the fixing tooth 305 is displaced circumferentially inside the annular groove 308, causing the fixing tooth 305 to be misaligned and locked within the annular groove 308. At this time, the inner wall of the fixing tooth 305 is tightly fitted with the outer wall of the first fixing ring 306 and the sealing ring 307, thus achieving initial axial locking of the pipeline 3. To further enhance the sealing performance and anti-loosening capability of the connection, the second fixing ring 3... 09 is fixedly connected to the top outer side of the fixing head 304. The second fixing ring 309 is used to limit the axial displacement of the fixing head 304 and increase the structural strength. The fixing bolt 301 passes through the corresponding through holes on the fixing plate 302 and the gasket 303, and is threadedly connected to the connecting flange or base part on the pipeline 3. As the fixing bolt 301 is tightened, the fixing bolt 301 drives the fixing plate 302 to move towards the pipeline 3, thereby pressing the gasket 303. Under the pressure, the gasket 303 undergoes elastic deformation, filling the tiny gaps at the connection, thereby achieving a high level of sealing effect.

[0024] The fixing component 4 includes a connecting block 405, a threaded post 404, a rotating ring 401, and a locking device 406. The connecting block 405 is fixedly installed on the back surface of the device body 1. A channel for medium flow is opened inside the connecting block 405. The threaded post 404 is fixedly connected to the outer end face of the connecting block 405. The outer surface of the threaded post 404 is provided with external threads. The rotating ring 401 is sleeved on the outer circumference of the connecting component 2. The inner wall of the rotating ring 401 is provided with a threaded groove 402 that matches the external threads of the threaded post 404. By rotating the rotating ring 401, the threaded groove 402 and the threaded post 404 engage with each other, driving the rotating ring 401 to move axially toward the connecting block 405. The connecting component 2 passes through the central hole of the rotating ring 401 and the locking device 406 and finally extends into the interior of the connecting block 405.

[0025] During this process, the locking device 406 is movably disposed in the internal cavity of the threaded post 404. The locking device 406 is located between the outer wall of the connecting assembly 2 and the inner wall of the threaded post 404. The inner side of the rotating ring 401 is also provided with a conical surface 403 with a conical structure. The conical surface 403 abuts against the outer end of the locking device 406. When the rotating ring 401 is tightened, the conical surface 403 applies axial thrust and radial extrusion force to the locking device 406, pushing the locking device 406 to move deeper along the axial direction of the threaded post 404 and generating contraction deformation. This makes the locking device 406 tightly grip the outer wall of the connecting assembly 2. The conical surface wedging principle realizes a fast and firm connection between the connecting assembly 2 and the device body 1, which can effectively resist thermal stress during high and low temperature cycling and prevent the interface from loosening.

[0026] In a preferred embodiment, to ensure uniform contraction of the locking device 406 under force and reliable gripping of the connecting component 2, the locking device 406 has a ring-shaped structure, and the outer diameter of the locking device 406 is slightly smaller than the inner diameter of the threaded post 404, so as to facilitate smooth insertion into the threaded post 404. At the same time, the locking device 406 is preferably made of a metal or composite material with a certain elasticity and resistance to high and low temperatures. When the rotating ring 401 pushes the locking device 406 to move axially along the threaded post 404 through the conical surface 403, the locking device 406 can adapt to the small tolerances of the outer surface of the connecting component 2 and provide a lasting clamping force.

[0027] As another preferred embodiment, in order to improve the locking stability at the connection of the pipeline 3 and prevent the fixing head 304 from accidentally reversing and falling off, in the design where the inner side wall of the fixing tooth 305 fits against the outer side wall of the first fixing ring 306 and the sealing ring 307, the contact surface can be set to a surface with a certain roughness or anti-slip texture. When the fixing head 304 drives the fixing tooth 305 to move along the circumferential direction of the annular groove 308 to achieve clamping by rotating, the frictional resistance can prevent the fixing head 304 from loosening on its own in the vibration environment.

[0028] As another preferred embodiment, in order to optimize the transmission path of the sealing clamping force, the fixing plate 302 is located on the outside of the gasket 303, and the head of the fixing bolt 301 directly abuts against the surface of the fixing plate 302. The fixing plate 302 has a rigid annular structure, which can convert the point pressure of the fixing bolt 301 into the surface pressure applied to the gasket 303. Under the tightening action of the fixing bolt 301, the fixing plate 302 uniformly presses the gasket 303, preventing the gasket 303 from being excessively deformed locally, which would lead to sealing failure.

[0029] In another preferred embodiment, in order to limit unnecessary movement of the fixing head 304 in the vertical or axial direction, a second fixing ring 309 is arranged around the upper part of the fixing head 304. The second fixing ring 309 and the fixing head 304 can be fixed by interference fit or welding. The lower edge of the second fixing ring 309 can form a limiting fit with the upper edge of the first fixing ring 306 to limit the axial displacement of the fixing head 304 and ensure that the fixing teeth 305 are always kept in the effective working area within the annular groove 308.

[0030] As another preferred embodiment, in order to adapt to complex installation environments and provide good shock absorption, the gasket 303 has a cylindrical structure and is preferably made of silicone or fluororubber resistant to high and low temperatures. The gasket 303 is fitted around the outer periphery of the connection part of the pipe 3, and the length of the gasket 303 covers the key sealing area of ​​the pipe 3 interface. The pipe 3 has a U-shaped structure, and the two ends of the pipe 3 are respectively connected to the two fixing components 4 on the back of the device body 1 through two connecting components 2, thereby forming a complete medium inlet and outlet circulation loop.

[0031] Working principle: The medium inside the device body 1 flows into the connecting component 2 through the locking device 406 in the fixing component 4 on the back of the device body 1, then through the pipe 3 and then through the connecting component 2 again, and then through the locking device 406 on the other side to flow back into the device body 1.

[0032] When assembling pipe 3, the fixing teeth 305 at the bottom of the fixing head 304 are passed through the first fixing ring 306 and the sealing ring 307, and then rotated inside the annular groove 308. The inner wall of the fixing teeth 305 then fits against the outer wall of the first fixing ring 306 and the sealing ring 307, and then gradually clamps as the fixing head 304 rotates. Then the second fixing ring 309 is fixed to the fixing head 304. Then the fixing bolt 301 is passed through the fixing plate 302 and the gasket 303, and then the fixing bolt 301 is rotated, so that the fixing plate 302 clamps the gasket 303.

[0033] When fixing the connecting component 2 to the device body 1, the connecting component 2 is inserted into the connecting block 405, and then the rotating ring 401 on the outside of the connecting component 2 is rotated. Then, it is connected to the threaded post 404 through the threaded groove 402. Then, the rotating ring 401 pushes the locking device 406 into the threaded post 404. Then, as the conical surface 403 is pushed into the threaded post 404, the rotating ring 401 is fixed to the connecting block 405.

Claims

1. A piping connection structure for a high and low temperature circulation device, comprising: The device body (1) and the connecting component (2) which is plugged into the device body (1) are connected to a pipeline (3). The device is characterized in that a fixing component (4) is fixedly provided on the back of the main body (1), the connecting component (2) is inserted into the interior of the fixing component (4), and the connection of the pipeline (3) is provided with a fixing head (304), a fixing tooth (305), a first fixing ring (306), a sealing ring (307) and an annular groove (308). The annular groove (308) is opened on the mating end face of the pipeline (3). The first fixing ring (306) and the sealing ring (307) are sleeved on the outer wall of the end of the pipeline (3). The fixing head (304) is sleeved on the outer periphery of the pipeline (3). The fixing tooth (305) is fixedly provided on the bottom inner wall of the fixing head (304). The fixing tooth (305) passes through the first fixing ring (306) and the sealing ring (307) and rotates into the interior of the annular groove (308). The connection of the pipeline (3) is also provided with a fixing bolt (301), a fixing plate (302), a gasket (303) and a second fixing ring (309). The second fixing ring (309) is fixedly connected to the top outer side of the fixing head (304). The fixing bolt (301) passes through the fixing plate (302) and the gasket (303) and is threadedly connected to the connecting flange of the pipeline (3).

2. The pipeline connection structure of a high and low temperature circulation device according to claim 1, characterized in that, The fixing component (4) includes a connecting block (405), a threaded post (404), a swivel (401), and a locking device (406). The connecting block (405) is fixedly installed on the surface of the device body (1). The threaded post (404) is fixedly connected to the outside of the connecting block (405). The swivel (401) is sleeved on the outer periphery of the connecting component (2) and threadedly connected to the threaded post (404).

3. The pipeline connection structure of a high and low temperature circulation device according to claim 2, characterized in that, The locking device (406) is movably disposed inside the threaded post (404). The inner wall of the rotating ring (401) is provided with a conical surface (403). The conical surface (403) abuts against the outer end of the locking device (406). The rotating ring (401) rotates and uses the conical surface (403) to push the locking device (406) to move axially along the threaded post (404).

4. The pipeline connection structure of a high and low temperature circulation device according to claim 2, characterized in that, The inner wall of the swivel (401) is provided with a threaded groove (402), which is adapted to the external thread of the threaded post (404). The connecting component (2) passes through the swivel (401) and the locker (406) and extends into the interior of the connecting block (405).

5. The pipeline connection structure of a high and low temperature circulation device according to claim 1, characterized in that, The inner wall of the fixing tooth (305) is in contact with the outer wall of the first fixing ring (306) and the sealing ring (307). The fixing head (304) rotates to drive the fixing tooth (305) to move along the circumferential direction of the annular groove (308) to achieve clamping.

6. The pipeline connection structure of a high and low temperature circulation device according to claim 1, characterized in that, The fixing plate (302) is located outside the gasket (303), and the head of the fixing bolt (301) abuts against the surface of the fixing plate (302). The fixing plate (302) presses the gasket (303) tightly under the tightening action of the fixing bolt (301).

7. The pipeline connection structure of a high and low temperature circulation device according to claim 1, characterized in that, The second fixing ring (309) is disposed around the upper part of the fixing head (304), and the second fixing ring (309) is used to limit the axial displacement of the fixing head (304).

8. The pipeline connection structure of a high and low temperature circulation device according to claim 1, characterized in that, The gasket (303) has a cylindrical structure, the fixing piece (302) has a circular structure, and the gasket (303) is sleeved on the outer periphery of the connection part of the pipeline (3).

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