Arc-shaped pipe joint for sealing pipe-in-pipe system

Abstract

The utility model discloses an arc-shaped pipe joint for sealing a pipe-in-pipe system, which comprises an outer pipe, an external system pipe fitting is arranged at the top end of the outer pipe, a sealing gasket is sleeved on the outer side of the bottom of the external system pipe fitting, the bottom end of the external system pipe fitting is connected with a pipe joint, the bottom of the pipe joint is connected with an inner pipe bent pipe, and the inner pipe bent pipe is connected with an outer pipe. A protruding block is arranged in an inner cavity of the external system pipe fitting. By combining the outer pipe, the external system pipe fitting, the sealing gasket, the pipe joint and the inner pipe elbow, the effect of transmitting two different fluids through one pipeline can be achieved, the inner pipe is wrapped by the outer pipe, as long as it is ensured that the fluid in the outer pipe does not corrode the inner pipe, the other fluid can be transmitted again in the inner pipe, and the effects of common transmission and no mutual influence are achieved; and meanwhile, the problem that an outer pipe is thin and cannot be in threaded connection or cannot be in welded connection and only can be mechanically fastened is solved, the pipe joint attached to the arc inner surface is ingeniously manufactured, and the double functions of mechanical fastening and sealing are achieved.

Description

Technical Field

[0001] The utility model relates to the field of arc-shaped pipe joints used for sealing a pipe-in-pipe system, in particular to an arc-shaped pipe joint used for sealing a pipe-in-pipe system. Background Art

[0002] At present, the pipe-in-pipe system is mostly suitable for heating systems, and the outer pipe in the pipe-in-pipe system is only a protection for the inner pipe, in which all gaseous or liquid fluids are transmitted in the inner pipe. The pipe-in-pipe system refers to a situation where two pipes can be transmitted at the same time, and the fluids in the two pipes do not affect each other. Due to the complexity of the pipeline system, in order to better realize the connection between the pipes, an arc pipe structure is needed to facilitate the subsequent better connection between the pipes;

[0003] However, in the previous applications of pipe-in-pipe systems, welding is generally used to achieve sealing requirements. In some systems with special materials or thin outer pipe walls, welding is not easy to achieve or may easily lead to reduced mechanical properties. Using ordinary nuts for tightening cannot achieve the sealing effect due to the gap formed between the arc and the plane of the pipe wall. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an arc-shaped pipe joint for sealing a pipe-in-pipe system, which can solve the technical problems that welding is generally used to achieve sealing requirements in previous applications of pipe-in-pipe systems, welding is not easy to achieve or easily leads to reduced mechanical properties in some systems with special materials or thin outer pipe walls, and ordinary nuts are used for tightening and the sealing effect cannot be achieved due to the gap formed between the arc of the pipe wall and the plane.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: an arc-shaped pipe joint for sealing a pipe-in-pipe system, comprising an outer pipe, the top end of the outer pipe is provided with an external system pipe fitting, and a sealing gasket is sleeved on the outer side of the bottom of the external system pipe fitting, the bottom end of the external system pipe fitting is connected with a pipe joint, and the bottom of the pipe joint is connected with an inner pipe elbow, the inner cavity of the external system pipe fitting is provided with a protrusion, and a sealing ring is distributed above the protrusion, the bottom of the external system pipe fitting is provided with a first threaded joint, the inner cavity of the pipe joint is provided with a first internal thread, the bottom of the pipe joint is provided with a second threaded joint, the inner side of the top end of the inner pipe elbow is provided with a second internal thread, and the inner cavity of the inner pipe elbow is provided with a flow guide structure.

[0006] As a preferred technical solution of the utility model, the flow guide structure includes a flow guide seat, an inclined surface, a groove and a diverter seat, the flow guide seat is arranged in the inner cavity of the inner tube bend, and one end of the inner tube bend is provided with an inclined surface, the surface of the inclined surface is provided with a groove, and the inner side of the other end of the inner tube bend away from the inclined surface is provided with a diverter seat.

[0007] As a preferred technical solution of the utility model, a filter cotton net is distributed on one side of the guide seat, and a bamboo charcoal fiber filter net is distributed on the other side of the filter cotton net.

[0008] As a preferred technical solution of the utility model, a groove is provided at one end of the bottom of the inner tube bend, and a retaining bar is provided on the inner side of the groove.

[0009] As a preferred technical solution of the utility model, the inner tube bend is threadedly connected with the second threaded joint through the second internal thread, and the second internal thread and the inner tube bend form an integrated structure.

[0010] As a preferred technical solution of the utility model, the protrusions are distributed equidistantly along the center point of the external system pipe, and the protrusions and the sealing ring are distributed in a flat shape.

[0011] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0012] 1. The combination of the outer tube, external system pipe fittings, sealing pads, pipe joints and inner tube elbows can achieve the effect of transmitting two different fluids in one pipeline. The outer tube wraps the inner tube. As long as the fluid in the outer tube is not corrosive to the inner tube, another fluid can be transmitted in the inner tube again to achieve the effect of mutual transmission without affecting each other. At the same time, the connection method that the outer tube is too thin to be threaded or welded and can only be mechanically fastened is solved. The pipe joint that fits the inner surface of the arc is cleverly made to achieve the dual effects of mechanical fastening and sealing;

[0013] 2. By using the combined use of the guide seat, filter cotton plate and bamboo charcoal fiber filter, it is convenient to filter and remove impurities from the circulating liquid in the subsequent pipelines, preventing the liquid circulating in the subsequent pipelines from being mixed with too many impurities, causing blockage of the subsequent pipelines and affecting the normal circulation of the subsequent liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of an arc-shaped pipe joint for sealing a pipe-in-pipe system according to the utility model;

[0015] Figure 2 It is a schematic diagram of the side view of the inner pipe bend of the arc-shaped pipe joint used for sealing the pipe-in-pipe system of the utility model;

[0016] Figure 3 It is a schematic diagram of the top view of the structure of the external system pipe fitting of the arc-shaped pipe joint used for sealing the pipe-in-pipe system of the utility model;

[0017] Figure 4This is a schematic diagram of the cross-sectional structure of the inner pipe bend of the arc-shaped pipe joint used for sealing the pipe-in-pipe system of the utility model;

[0018] Among them: 1. outer tube; 2. external system pipe fittings; 3. sealing gasket; 4. pipe joint; 5. inner tube elbow; 6. bump; 7. sealing ring; 8. first threaded joint; 9. first internal thread; 10. second threaded joint; 11. second internal thread; 12. guide seat; 13. inclined surface; 14. groove; 15. diverter seat; 16. filter cotton net; 17. bamboo charcoal fiber filter net; 18. slot; 19. baffle. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0020] Example

[0021] Please refer to Figure 1 , Figure 2 and Figure 3 As shown, the utility model provides an arc-shaped pipe joint for sealing a pipe-in-pipe system, comprising an outer pipe 1, an external system pipe fitting 2 is arranged at the top of the outer pipe 1, and a sealing gasket 3 is sleeved on the outer side of the bottom of the external system pipe fitting 2, a pipe joint 4 is connected to the bottom end of the external system pipe fitting 2, and an inner pipe elbow 5 is connected to the bottom of the pipe joint 4, a protrusion 6 is arranged in the inner cavity of the external system pipe fitting 2, and a sealing ring 7 is distributed above the protrusion 6, the protrusion 6 is equidistantly distributed along the center point of the external system pipe fitting 2, and the protrusion 6 and the sealing ring 7 are distributed in a flat shape, a first threaded joint 8 is arranged at the bottom of the external system pipe fitting 2, a first internal thread 9 is opened in the inner cavity of the pipe joint 4, a second threaded joint 10 is arranged at the bottom of the pipe joint 4, a second internal thread 11 is opened on the inner side of the top of the inner pipe elbow 5, and a flow guide structure is arranged in the inner cavity of the inner pipe elbow 5;

[0022] When in use, firstly, the connection between the outer tube 1, the inner tube elbow 5, the pipe joint 4 and the external system pipe fitting 2 is realized. Then, when the multiple components are connected, the connection with the external system is realized through the setting of the external system pipe fitting 2. Since a plurality of protrusions 6 are arranged on the inner side of the top of the external system pipe fitting 2, when the external system pipe fitting 2 is connected with the external system, the protrusions 6 will be engaged with the external system. Then, the sealing ring 7 is combined to improve the sealing and stability of the connection between the external system and the external system pipe fitting 2, so as to facilitate the subsequent circulation of liquid.

[0023] As a further implementation of this embodiment, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an external system pipe fitting 2 is provided at the top of the outer tube 1, and a sealing gasket 3 is sleeved on the outer side of the bottom of the external system pipe fitting 2, a pipe joint 4 is connected to the bottom end of the external system pipe fitting 2, and an inner pipe elbow 5 is connected to the bottom of the pipe joint 4, the inner pipe elbow 5 is threadedly connected with the second threaded joint 10 through a second internal thread 11, and the second internal thread 11 and the inner pipe elbow 5 form an integrated structure, a first threaded joint 8 is provided at the bottom of the external system pipe fitting 2, a first internal thread 9 is provided in the inner cavity of the pipe joint 4, a second threaded joint 10 is provided at the bottom of the pipe joint 4, a second internal thread 11 is provided on the inner side of the top of the inner pipe elbow 5, a guide seat 12 is provided in the inner cavity of the inner pipe elbow 5, and an inclined surface 13 is provided at one end of the inner pipe elbow 5, a groove 14 is provided on the surface of the inclined surface 13, the grooves 14 are equidistantly distributed on the surface of the inclined surface 13, and the grooves 14 and the inclined surface 13 form an integral structure. The structure is as follows: when the liquid flows through the inclined surface 13, the liquid will pass through the groove 14, and then the fine particles mixed in the liquid will be retained on the inner side of the groove 14 under the impact of the water flow, thereby playing a simple filtering treatment. A diverter seat 15 is arranged on the inner side of the other end of the inner tube bend 5 away from the inclined surface 13. The diverter seat 15 can perform a simple diversion treatment on the circulating water flow to prevent the circulating water flow from directly impacting a part of the filter cotton net 16, causing the filter cotton net 16 to be flushed for a long time and affecting the normal service life. The diverter seat 12, the inclined surface 13, the groove 14 and the diverter seat 15 constitute a diversion structure, and the diversion structure is arranged in the inner cavity of the inner tube bend 5. The filter cotton net 16 is distributed on one side of the diverter seat 12, and the bamboo charcoal fiber filter net 17 is distributed on the other side of the filter cotton net 16. A card slot 18 is opened at one end of the bottom of the inner tube bend 5, and a retaining bar 19 is arranged on the inner side of the card slot 18;

[0024] First, a vertical hole is drilled at the top of the outer tube 1, and the external system pipe fitting 2 with an external thread is inserted into the inner side of the outer tube 1 through the hole. Then, the external system pipe fitting 2 is threadedly connected with the first internal thread 9 opened in the inner cavity of the pipe joint 4 through the first threaded joint 8 set at the bottom thereof, and a sealing gasket 3 is installed between the two. Since the pipe joint 4 is an arc-shaped surface and it is completely fitted with the inner arc surface of the outer tube 1, there is no gap when the sealing gasket 3 is installed, and a perfect sealing can be achieved. The pipe joint 4 is threadedly connected with the second internal thread 11 opened on the inner side of the top of the inner tube elbow 5 through the second threaded joint 10 set at the bottom thereof. The other end of the inner tube elbow 5 is connected with the inner tube of the pipe-in-pipe system. Since the other end of the inner tube elbow 5 is provided with a slot 18, and the inner part of the slot 18 is There are multiple baffles 19 distributed along the center point of the side, so when the pipe joint 4 is connected to the inner pipe of the pipe-in-pipe system, the inner pipe of the pipe-in-pipe system will be engaged with the card groove 18, and the surface of the connecting end of the inner pipe of the pipe-in-pipe system will be reserved with an adapter groove that matches the size of the baffle 19, which is convenient for subsequent better card connection processing. After the inner pipe elbow 5 is connected, the overall height is smaller than the diameter of the outer pipe 1, ensuring that it can be installed inside, and when the liquid flows in the inner pipe elbow 5, it will flow along the guide seat 12, and the groove 14 opened on the surface of the inclined surface 13 can be used for simple filtering treatment, and then the liquid passes through the diversion seat 15 for simple diversion treatment, and then the impurities mixed in the liquid can be further removed by the provided filter cotton net 16 and bamboo charcoal fiber filter net 17;

[0025] Specific working principle:

[0026] First, a vertical hole is drilled at the top of the outer tube 1, and the external system pipe fitting 2 with an external thread is inserted into the inner side of the outer tube 1 through the drilled hole. Then, the external system pipe fitting 2 is threadedly connected with the first internal thread 9 opened in the inner cavity of the pipe fitting 4 through the first threaded joint 8 set at the bottom thereof, and a sealing gasket 3 is installed between the two. Since the pipe fitting 4 is an arc-shaped surface and is completely fitted with the inner arc surface of the outer tube 1, there is no gap when the sealing gasket 3 is installed, and a perfect sealing performance can be achieved. The pipe fitting 4 is threadedly connected with the second internal thread 11 opened on the inner side of the top of the inner pipe elbow 5 through the second threaded joint 10 set at the bottom thereof. The other end of the inner pipe elbow 5 is connected with the inner pipe of the pipe-in-pipe system. Since a groove 18 is opened at the other end of the inner pipe elbow 5, and a plurality of retaining strips 19 are distributed along the center point on the inner side of the groove 18, when the pipe fitting 4 is connected to the inner pipe of the pipe-in-pipe system, the inner pipe of the pipe-in-pipe system will be engaged with the groove 18, and the surface of the connecting end of the inner pipe of the pipe-in-pipe system will An adapter groove matched with the size of the baffle 19 is reserved to facilitate better subsequent clamping processing. After the inner tube bend 5 is connected, the overall height is smaller than the diameter of the outer tube 1 to ensure that it can be installed inside. When the liquid flows in the inner tube bend 5, it will flow along the guide seat 12, and the groove 14 opened on the surface of the inclined surface 13 can be used for simple filtering processing. Then the liquid passes through the diversion seat 15 for simple diversion processing, and then the filter cotton net 16 and the bamboo charcoal fiber filter net 17 are provided to further remove impurities mixed in the liquid. Since a plurality of protrusions 6 are provided on the inner side of the top of the external system pipe 2, when the external system pipe 2 is connected to the external system, the protrusion 6 will be clamped and connected with the external system, and then the sealing ring 7 provided can improve the sealing and stability of the connection between the external system and the external system pipe 2, which is convenient for the subsequent circulation of liquid. The practicality of the entire arc pipe joint can be improved by combining the settings of multiple structures.

[0027] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An arc-shaped pipe joint for sealing a pipe-in-pipe system, comprising an outer pipe (1), characterized in that: The top of the outer tube (1) is provided with an external system pipe fitting (2), and the outer side of the bottom of the external system pipe fitting (2) is sleeved with a sealing gasket (3), the bottom end of the external system pipe fitting (2) is connected to a pipe joint (4), and the bottom of the pipe joint (4) is connected to an inner pipe elbow (5), the inner cavity of the external system pipe fitting (2) is provided with a protrusion (6), and a sealing ring (7) is distributed above the protrusion (6), the bottom of the external system pipe fitting (2) is provided with a first threaded joint (8), the inner cavity of the pipe joint (4) is provided with a first internal thread (9), the bottom of the pipe joint (4) is provided with a second threaded joint (10), the inner side of the top of the inner pipe elbow (5) is provided with a second internal thread (11), and the inner cavity of the inner pipe elbow (5) is provided with a flow guide structure.

2. The arc-shaped pipe joint for sealing a pipe-in-pipe system according to claim 1, characterized in that: The flow guide structure comprises a flow guide seat (12), an inclined surface (13), a groove (14) and a flow diverter seat (15); the flow guide seat (12) is arranged in the inner cavity of the inner tube bend (5); one end of the inner tube bend (5) is provided with an inclined surface (13); the surface of the inclined surface (13) is provided with a groove (14); and the inner side of the other end of the inner tube bend (5) away from the inclined surface (13) is provided with a flow diverter seat (15).

3. The arc-shaped pipe joint for sealing a pipe-in-pipe system according to claim 2, characterized in that: A filter cotton net (16) is distributed on one side of the flow guide seat (12), and a bamboo charcoal fiber filter net (17) is distributed on the other side of the filter cotton net (16).

4. The arc-shaped pipe joint for sealing a pipe-in-pipe system according to claim 1, characterized in that: A clamping groove (18) is provided at one end of the bottom of the inner tube bend (5), and a retaining strip (19) is provided on the inner side of the clamping groove (18).

5. The arc-shaped pipe joint for sealing a pipe-in-pipe system according to claim 1, characterized in that: The inner tube bend (5) is threadedly connected to the second threaded joint (10) via the second inner thread (11), and the second inner thread (11) and the inner tube bend (5) form an integrated structure.

6. The arc-shaped pipe joint for sealing a pipe-in-pipe system according to claim 1, characterized in that: The protrusions (6) are distributed at equal distances along the center point of the external system pipe (2), and the protrusions (6) and the sealing ring (7) are distributed in a flat shape.

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