A movable sealing structure for internal and external pipelines

Abstract

This utility model provides a movable sealing structure for internal and external pipelines, relating to the field of sealing structure technology. It includes two external pipelines and an internal pipeline disposed inside the external pipelines. One end of each of the two external pipelines is fixedly connected by two interlocking flanges, and a flange sealing ring is provided between the two interlocking flanges to achieve a seal on the external pipelines. A retainer forms a channel for the internal pipeline to pass through. An internal pipeline sealing ring is embedded in the retainer at the connection between the retainer and the internal pipeline. A spacer ring is provided between each side of the retainer and the two interlocking flanges, and a retainer sealing ring is provided between the retainer and the spacer ring. A spacer ring sealing ring is provided between the interlocking flange and the spacer ring. This solution achieves a movable sealing effect for the internal and external pipelines.

Description

Technical Field

[0001] This utility model relates to the field of pipeline sealing technology, and more specifically, to a movable sealing structure for internal and external pipelines. Background Technology

[0002] In the field of industrial pipeline connections and sealing, the design of the sealing structure is crucial to ensuring the safety and reliability of fluid transportation. Especially in situations requiring simultaneous sealing of internal and external pipelines, traditional single-pipe sealing ring connections are no longer sufficient. Existing technologies typically achieve single-pipe sealing with simple sealing rings, but this design is only suitable for fixed sealing scenarios of a single pipeline and is ill-suited for the complex conditions of simultaneously sealing internal and external pipelines. Furthermore, the limitations of traditional fixed sealing structures become particularly pronounced when both internal and external pipelines need sealing and the docking mechanism involves significant movement. Due to the large positioning movement of the connecting components, fixed sealing methods are prone to seal failure, thereby affecting the stability and safety of the overall system. Utility Model Content

[0003] This utility model discloses an internal and external pipeline moving sealing structure, which aims to solve the problems mentioned above.

[0004] The present invention adopts the following solution:

[0005] An internal and external pipe movable sealing structure includes two external pipes and an internal pipe disposed inside the external pipes. One end of the two external pipes is fixedly connected by two interlocking flanges, and a flange sealing ring is provided between the two interlocking flanges to achieve sealing of the external pipes. An installation groove is formed between the two interlocking flanges, and a retainer is disposed in the installation groove. The retainer forms a channel for the internal pipe to pass through. An internal pipe sealing ring is embedded in the retainer at the connection between the retainer and the internal pipe. A spacer ring is provided between each side of the retainer and the two interlocking flanges, and a retainer sealing ring is provided between the retainer and the spacer ring. A spacer ring sealing ring is provided between the interlocking flange and the spacer ring.

[0006] Furthermore, the top surface of the retainer contacts the mounting groove and forms a seal.

[0007] Furthermore, the spacer ring is made of polytetrafluoroethylene (PTFE) so that it can slide on the sealing ring while utilizing its lubricating properties to achieve a seal.

[0008] Furthermore, the retainer has a first sealing groove on the side facing the inner pipe for installing the inner pipe sealing ring.

[0009] Furthermore, a second sealing groove is provided on each side of the retainer for installing the retainer sealing ring.

[0010] Furthermore, the locking flange has a third sealing groove on the side facing the spacer ring for installing the spacer ring sealing ring.

[0011] Furthermore, the two locking flanges are fixedly connected by bolts.

[0012] Furthermore, the other end of the outer pipe is provided with an outer pipe flange for connecting to an external mechanism; one end of the inner pipe is provided with an inner pipe flange for connecting to another external mechanism.

[0013] Beneficial effects:

[0014] This solution utilizes flange bolt holes and flange sealing rings to achieve sealing of the external pipeline. The retainer serves as the carrier for the inner pipeline sealing ring and the two retainer sealing rings, and also provides sealing on one side. The inner pipeline sealing ring directly acts on the inner pipeline for sealing, while its two retainer sealing rings seal one side of each of the two spacer rings. The two spacer rings are supported by the flange and seal with it, while their other sides seal the other sides of the two spacer rings respectively, thus forming a seal for the inner pipeline. Furthermore, the spacer rings are made of polytetrafluoroethylene (PTFE), which has good self-lubricating properties and slides on the sealing rings to achieve sealing. The overall structure constitutes a moving sealing mechanism for the inner and outer pipelines, where the inner pipe requires independent sealing and the docking mechanism has a large range of motion. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal and external pipeline moving sealing structure according to an embodiment of the present invention;

[0016] Reference numerals: 1. External pipe, 2. Locking flange, 3. Flange sealing ring, 4. External pipe flange, 5. Internal pipe, 6. Internal pipe flange, 7. Cage, 8. Spacer ring, 9. Internal pipe sealing ring, 10. Cage sealing ring, 11. Spacer ring sealing ring. Detailed Implementation

[0017] Combination Figure 1This embodiment provides an internal and external pipe movable sealing structure, including two external pipes 1 and an internal pipe 5 disposed inside the external pipes 1. One end of the two external pipes 1 is fixedly connected by two interlocking flanges 2. A flange sealing ring 3 is disposed between the two interlocking flanges 2 to achieve sealing of the external pipes 1. An installation groove is formed between the two interlocking flanges 2, and a retainer 7 is disposed in the installation groove. The retainer 7 forms a channel for the internal pipe 5 to pass through. An internal pipe sealing ring 9 is embedded in the retainer 7 at the connection between the retainer 7 and the internal pipe 5. A spacer ring 8 is disposed between each side of the retainer 7 and the two interlocking flanges 2, and a retainer sealing ring 10 is disposed between the retainer 7 and the spacer ring 8. A spacer ring sealing ring 11 is disposed between the interlocking flange 2 and the spacer ring 8.

[0018] In this embodiment, an external pipe flange 4 is provided at the other end of the external pipe 1 to connect to an external mechanism; an internal pipe flange 6 is provided at one end of the internal pipe 5 to connect to another external mechanism. The interlocking flanges 2 are respectively provided at one end of the two external pipes 1 and are locked with bolts. A flange sealing ring 3 is provided between the two interlocking flanges 2 to achieve an external seal between the two external pipes 1. Grooves are formed on one side of the two interlocking flanges 2 to form the mounting groove, which is used to install the retainer 7. Here, the outer circumferential surface of the retainer 7 contacts and connects with the inner wall of the mounting groove, and abuts against the top inner wall of the mounting groove, so that the top surface of the retainer 7 contacts the mounting groove and forms a seal.

[0019] Here, the retainer 7 has a first sealing groove on the side facing the inner pipe 5 for installing the inner pipe sealing ring 9, and second sealing grooves on both sides of the retainer 7 for installing the retainer sealing ring 10. The retainer 7 serves as a carrier for the inner pipe sealing ring 9 and the two retainer sealing rings 10, and also provides sealing on one side. Additionally, a third sealing groove is provided on the side of the locking flange 2 facing the spacer ring 8 for installing the spacer ring sealing ring 11. Through the design of multiple sealing grooves, the installation of the sealing rings and the sealing of the inner pipe 5 are achieved.

[0020] In this embodiment, the spacer ring 8 is made of polytetrafluoroethylene (PTFE) to achieve a seal while sliding on the sealing ring using its lubricating properties. The spacer ring 8 is composed of PTFE material, which has inherent lubricating properties that allow it to slide well on the sealing ring while achieving a seal.

[0021] It should be noted that the movable seal described here includes movement within the channel formed by the inner pipe 5 and the retainer 7, as well as the sliding formed by the rotation of the inner pipe 5 and the retainer 7 relative to the outer pipe 1. Through ingenious design, multiple sealing grooves are provided, and the PFTE spacer 8 serves as both a sealing isolation plate and utilizes its self-lubricating properties to achieve a sliding seal with the sealing ring.

[0022] It should be understood that the above are only preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.

[0023] The accompanying drawings used in the above description of the embodiments only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

Claims

1. A movable sealing structure for internal and external pipelines, comprising two external pipelines and an internal pipeline disposed inside the external pipelines, wherein one end of the two external pipelines is fixedly connected by two interlocking flanges, and a flange sealing ring is provided between the two interlocking flanges to achieve sealing of the external pipelines; characterized in that, A mounting groove is formed between the two locking flanges, and a retainer is disposed within the mounting groove; the retainer forms a channel for the inner pipe to pass through; wherein, An inner pipe sealing ring is embedded in the retainer at the connection between the retainer and the inner pipe; a spacer ring is provided between each side of the retainer and the two locking flanges, and a retainer sealing ring is provided between the retainer and the spacer ring, and a spacer ring sealing ring is provided between the locking flange and the spacer ring.

2. The internal and external pipeline moving sealing structure according to claim 1, characterized in that, The top surface of the retainer contacts the mounting groove and forms a seal.

3. The internal and external pipeline moving sealing structure according to claim 1, characterized in that, The spacer ring is made of polytetrafluoroethylene (PTFE) so that it can slide on the sealing ring while making use of its lubricating properties to achieve a seal.

4. The internal and external pipeline moving sealing structure according to claim 1, characterized in that, The retainer has a first sealing groove on the side facing the inner pipe for installing the inner pipe sealing ring.

5. The internal and external pipeline moving sealing structure according to claim 4, characterized in that, The retainer has a second sealing groove on each side for installing the retainer sealing ring.

6. The internal and external pipeline moving sealing structure according to claim 1, characterized in that, The locking flange has a third sealing groove on the side facing the spacer ring for installing the spacer ring sealing ring.

7. The internal and external pipeline moving sealing structure according to claim 1, characterized in that, The two interlocking flanges are fixedly connected by bolts.

8. The internal and external pipeline moving sealing structure according to claim 1, characterized in that, The other end of the outer pipe is provided with an outer pipe flange for connecting to an external mechanism; one end of the inner pipe is provided with an inner pipe flange for connecting to another external mechanism.

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