A pipe insulation joint

Abstract

The application provides a pipeline insulation joint, relates to the technical field of pipeline connection, and comprises a first pipe body and a second pipe body connected with each other, wherein the first pipe body and the second pipe body are provided with a first insulation ring therebetween, and a sealing rubber ring is arranged between the connecting end of the first pipe body and the first insulation ring and between the connecting end of the second pipe body and the first insulation ring; the sealing rubber ring comprises a rubber ring main body and a first connecting body and a second connecting body connected with both ends of the rubber ring main body, respectively; the first connecting body and the second connecting body are connected with the rubber ring main body to form a U-shaped structure; spring sheets are arranged in the first connecting body and the second connecting body; an elastic corrugated plate is arranged in the rubber ring main body; and both ends of the elastic corrugated plate are connected with the spring sheets; and the first connecting body and the second connecting body are arranged to be inclined to the outside in a natural state; and the application can still guarantee excellent sealing performance when the pipeline pressure changes sharply.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline connection, in particular to a pipeline insulation joint. BACKGROUND

[0002] At present, with the development of city modernization and industry, pipelines increase rapidly, and long-distance pipelines (oil, gas, water, etc.) such as oil and gas pipelines are laid underground and are subjected to strong influence of external environment and internal medium for a long time. In addition, with the convenience requirements of users, the installation mode of some insulation joints is gradually transferred from underground installation to ground installation. Since the length of the ground pipe section of the long-distance pipeline is limited, the installation position of the insulation joint is close to the stress concentration parts such as elbows and tees, and it is very likely that the pipeline will be subjected to a large stress in the use process, and the structure of the pipeline will be deformed. In this case, the insulation joint must ensure the sealing performance, so the sealing requirement of the insulation joint is more stringent, and the structure performance of the insulation joint must be more suitable for structural deformation and sealing at the same time. SUMMARY

[0003] The purpose of the present application is to provide a pipeline insulation joint to solve the problems existing in the prior art, which can still ensure excellent sealing performance when the pipeline pressure changes sharply.

[0004] The present application provides a pipeline insulation joint, comprising a first pipe body and a second pipe body connected together, a first insulation ring between the first pipe body and the second pipe body, a sealing rubber ring provided between the connecting end of the first pipe body and the first insulation ring and between the connecting end of the second pipe body and the first insulation ring; the sealing rubber ring comprises a rubber ring main body and a first connecting body and a second connecting body connected to both ends of the rubber ring main body, the first connecting body and the second connecting body are connected to the rubber ring main body in a U-shaped structure, a spring sheet is arranged in the first connecting body and the second connecting body, an elastic corrugated plate is arranged in the rubber ring main body, and both ends of the elastic corrugated plate are connected to the spring sheet; in a natural state, the first connecting body and the second connecting body are inclined outward.

[0005] As an embodiment, both ends of the elastic corrugated plate are connected to the spring sheet through an arc-shaped plate, and the arc-shaped plate is arranged close to the edges and corners of the rubber ring main body.

[0006] As an embodiment, the ends of the first pipe body and the second pipe body are connected to an outer flange and an inner flange respectively, the first insulation ring is arranged between the outer flange and the inner flange, the sealing rubber ring is arranged between the outer flange and the first insulation ring and between the inner flange and the first insulation ring, and a hook ring is arranged on the second pipe body, one end of the hook ring abuts against the axial end face of the inner flange, and the other end of the hook ring is connected to the outer flange.

[0007] As an embodiment, the hook ring is connected with the outer flange through threads.

[0008] As an embodiment, a second insulation ring, a third insulation ring and a fourth insulation ring are arranged between the hook ring and the outer flange, the second insulation ring is attached to the circumferential wall surface of the inner flange, the third insulation ring is attached to the axial wall surface of the inner flange, and the fourth insulation ring is attached to the circumferential wall surface of the inner flange and the circumferential wall surface of the second pipe body.

[0009] As an embodiment, along the tightening direction of the hook ring, the end circumferential wall surface of the hook ring is in a tapered shape with gradually increasing diameter, and the outer wall surface of the fourth insulation ring is in a tapered shape with gradually increasing diameter and is matched with the end circumferential wall surface of the hook ring.

[0010] As an embodiment, accommodating cavities are arranged between the outer flange and the first insulation ring and between the inner flange and the insulation ring, the sealing rubber ring is arranged in the accommodating cavities, the first connecting body is in abutment with the outer flange or the inner flange, and the second connecting body is in abutment with the first insulation ring.

[0011] As an embodiment, the end of the first connecting body has an extension extending towards the second connecting body, and the end of the second connecting body has a protrusion extending towards the first connecting body.

[0012] As an embodiment, the first insulation ring comprises a first part and a second part, the first part and the second part have an accommodating cavity therebetween, the sealing rubber ring is arranged in the accommodating cavity, the first connecting body is in abutment with the outer flange, and the second connecting body is in abutment with the inner flange.

[0013] As an embodiment, an overload protection device is further electrically connected between the first pipe body and the second pipe body.

[0014] Compared with the prior art, the present application has the following technical effects:

[0015] The first connector and the second connector are both inclined outward in a natural state, and spring sheets are arranged in the first connector and the second connector, so that the first connector and the second connector are tightly attached to the contact surface under the action of elastic restoring force after the sealing rubber ring is pressed by the first pipe body and the second pipe body, and good sealing performance is ensured. When the pressure in the pipeline becomes larger or smaller, the pressure on the sealing rubber ring is increased or decreased, the rubber material in the sealing rubber ring has excellent buffering capacity, and can enhance the resilience under the action of the spring sheet and the elastic corrugated plate, so as to adapt to the volume change of the cavity where the sealing rubber ring is located, and the problem that the resilience of the traditional rubber ring becomes poor after being pressed for a long time is avoided. In addition, after the elastic corrugated plate is added to the rubber ring body in the application, on the one hand, the resilience of the rubber ring body is improved, and on the other hand, the rigidity of the rubber ring body is improved, and the possibility of being squeezed into the gap between the pipe body and the first insulating ring under the action of great pressure is reduced, which is beneficial to ensuring the sealing stability.

[0016] The other technical solutions in the application also have the following technical effects compared with the prior art:

[0017] In the application, the two ends of the elastic corrugated plate are connected with the spring sheet through the arc-shaped plate, and the arc-shaped plate is arranged close to the corner of the rubber ring body. When the first connector or the second connector is squeezed, the spring sheet rotates relative to the elastic corrugated plate, and the arc-shaped plate participates in the rotation process and is twisted, so that the spring sheet is prevented from being twisted only around the connection point of the elastic corrugated plate, and the breakage of the connection position of the spring sheet and the elastic corrugated plate is avoided. Moreover, the arc-shaped plate is arranged close to the corner position of the rubber ring body, and the rigidity of the corner position of the rubber ring body is further improved, and the possibility of the rubber material wrapped outside the arc-shaped plate being squeezed into the gap is reduced.

[0018] In the application, the hook ring and the outer flange are connected through threads, so that the pipe body and the sealing rubber ring can be easily disassembled and maintained, and the end inner circumferential wall surface of the hook ring and the outer wall surface of the fourth insulating ring are both in a conical shape, so that the installation stability of the insulating rings can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0020] Figure 1 It is a structure schematic view of the pipeline insulating joint in one embodiment of the application.

[0021] Figure 2 It is a schematic view of the first sealing structure form in one embodiment of the application.

[0022] Figure 3 Fig. 1 is a structural schematic diagram of a sealing rubber ring in a first sealing structure form in an embodiment of the present application;

[0023] Figure 4 Fig. 2 is a schematic diagram of a second sealing structure form in an embodiment of the present application;

[0024] Figure 5 Fig. 3 is a structural schematic diagram of a sealing rubber ring in the second sealing structure form in an embodiment of the present application.

[0025] Wherein, 1, first pipe body; 2, second pipe body; 3, outer flange; 4, inner flange; 5, hook ring; 6, first insulation ring; 7, second insulation ring; 8, third insulation ring; 9, fourth insulation ring; 10, sealing rubber ring; 11, overload protection device; 101, rubber ring main body; 102, first connecting body; 103, second connecting body; 104, spring sheet; 105, elastic corrugated plate; 106, arc plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0027] The purpose of the present application is to provide a pipe insulation joint to solve the problems in the prior art, which can still guarantee excellent sealing performance when the pipe pressure changes sharply.

[0028] In order to make the above purposes, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0029] As Figures 1-5As shown, the embodiment provides a pipeline insulation joint, which comprises a first pipe body 1 and a second pipe body 2 connected together, and a first insulation ring 6 between the first pipe body 1 and the second pipe body 2. A sealing rubber ring 10 is arranged between the connecting end of the first pipe body 1 and the first insulation ring 6 and between the connecting end of the second pipe body 2 and the first insulation ring 6. The sealing rubber ring 10 comprises a rubber ring main body 101 and a first connecting body 102 and a second connecting body 103 connected to both ends of the rubber ring main body 101 respectively, and the first connecting body 102 and the second connecting body 103 are connected to the rubber ring main body 101 in a U-shaped structure. A spring sheet 104 is arranged in the first connecting body 102 and the second connecting body 103, and an elastic corrugated plate 105 is arranged in the rubber ring main body 101, and both ends of the elastic corrugated plate 105 are connected to the spring sheet 104. In the embodiment, the spring sheet 104 and the elastic corrugated plate 105 are annular structures. In a natural state, the first connecting body 102 and the second connecting body 103 are arranged obliquely outward; here, the outward direction refers to the direction in which the first connecting body 102 and the second connecting body 103 move away from each other.

[0030] In use, the sealing rubber ring 10 is arranged between the first insulation ring 6 and the pipe bodies on both sides, the first connecting body 102 and the second connecting body 103 are arranged axially towards the first pipe body 1 and the second pipe body 2 respectively, and the first pipe body 1 and the second pipe body 2 press the sealing rubber ring 10 against the first insulation ring 6 to seal the gap between the first insulation ring 6 and the two pipe bodies. Since the first connecting body 102 and the second connecting body 103 are obliquely outward in the natural state, and the spring sheet 104 is arranged in the first connecting body 102 and the second connecting body 103, after the first pipe body 1 and the second pipe body 2 press the sealing rubber ring 10, the first connecting body 102 and the second connecting body 103 will be in close contact with the contact surface under the action of the elastic restoring force, ensuring good sealing performance. When the pressure in the pipeline increases or decreases, causing the pressure on the sealing rubber ring 10 to increase or decrease, the rubber material in the sealing rubber ring 10 has excellent buffering capacity and can enhance the resilience under the action of the spring sheet 104 and the elastic corrugated plate 105 to adapt to the volume change of the cavity where the sealing rubber ring 10 is located, and also avoids the problem that the resilience of the traditional rubber ring becomes poor after being pressed for a long time. In addition, in the embodiment, the elastic corrugated plate 105 is added to the rubber ring main body 101, which can improve the resilience of the rubber ring main body 101 on the one hand, and can also improve the rigidity of the rubber ring main body 101 on the other hand, reducing the possibility of being squeezed into the gap between the pipe body and the first insulation ring 6 under the action of a large pressure, which is conducive to ensuring the stability of the sealing.

[0031] As Figure 3 , Figure 5As shown, the two ends of the elastic corrugated plate 105 are connected with the spring sheet 104 through the arc-shaped plate 106, which is arranged close to the corner of the rubber ring body 101. The arc-shaped plate 106 can be a superior arc or an inferior arc. When the first connecting body 102 or the second connecting body 103 is pressed to make the spring sheet 104 rotate relative to the elastic corrugated plate 105, the arc-shaped plate 106 participates in the rotation process to be twisted, avoiding the situation that the spring sheet 104 is only twisted around the connecting point with the elastic corrugated plate 105, which is easy to cause the fracture of the connecting position of the spring sheet 104 and the elastic corrugated plate 105. Moreover, the arc-shaped plate 106 is arranged close to the corner of the rubber ring body 101, which further strengthens the rigidity of the corner of the rubber ring body 101 and reduces the possibility that the rubber material wrapped outside the arc-shaped plate 106 is squeezed into the gap.

[0032] In order to facilitate the connection of the first pipe body 1 and the second pipe body 2, the ends of the first pipe body 1 and the second pipe body 2 are connected with the outer flange 3 and the inner flange 4 respectively, and the connection mode can adopt welding; the first insulation ring 6 is arranged between the outer flange 3 and the inner flange 4, and the sealing rubber ring 10 is arranged between the outer flange 3 and the first insulation ring 6 and between the inner flange 4 and the first insulation ring 6. The pipeline insulation joint in the embodiment further comprises a hook ring 5, which is sleeved on the second pipe body 2, one end of the hook ring 5 abuts against the axial end face of the inner flange 4, and the other end is connected with the outer flange 3. The hook ring 5 can be welded and fixed with the end of the outer flange 3. However, after welding, it is not convenient to disassemble and maintain the pipeline, therefore, in the embodiment, the hook ring 5 and the outer flange 3 can also be connected through threads.

[0033] In the embodiment, the second insulation ring 7, the third insulation ring 8 and the fourth insulation ring 9 are arranged between the hook ring 5 and the outer flange 3, the second insulation ring 7 is attached to the circumferential wall surface of the inner flange 4, the third insulation ring 8 is attached to the axial wall surface of the inner flange 4, and the fourth insulation ring 9 is attached to the circumferential wall surface of the inner flange 4 and the circumferential wall surface of the second pipe body 2. In the embodiment, the hook ring 5 is fixedly connected with the outer flange 3, the first insulation ring 6, the second insulation ring 7, the third insulation ring 8 and the fourth insulation ring 9 abut against each other to form an insulation belt, which isolates the hook ring 5 from the inner flange 4 and the second pipe body 2, and further insulates and isolates the outer flange 3 from the inner flange 4.

[0034] In the embodiment, the first insulation ring 6, the second insulation ring 7, the third insulation ring 8 and the fourth insulation ring 9 can be epoxy glass cloth laminated boards.

[0035] In this embodiment, along the tightening direction of the hook ring 5, the inner circumferential wall of the end of the hook ring 5 is a tapered shape with a gradually increasing diameter, and the outer wall of the fourth insulating ring 9 is a tapered shape with a gradually increasing diameter that matches the inner circumferential wall of the end of the hook ring 5. When the hook ring 5 is screwed in, it gradually presses the fourth insulating ring 9 tightly. Since both the inner circumferential wall of the end of the fourth insulating ring 9 and the hook ring 5 are tapered, the force exerted by the hook ring 5 on the fourth insulating ring 9 can be decomposed into axial force and radial force. The axial force can press the fourth insulating ring 9 and the third insulating ring 8 tightly onto the outer flange 3, and the radial force can press the fourth insulating ring 9 tightly onto the circumferential wall of the outer flange 3 and the second pipe body 2, thereby ensuring the installation stability of each insulating ring.

[0036] In this embodiment, the sealing ring 10 can be configured in two structural forms.

[0037] The first structural design requires two sealing rings (10), such as... Figure 2 , Figure 3 As shown. In this embodiment, there are receiving cavities between the outer flange 3 and the first insulating ring 6, and between the inner flange 4 and the insulating ring. A sealing ring 10 is installed in each receiving cavity. The first connecting body 102 abuts against the inner flange 4 or the outer flange 3, and the second connecting body 103 abuts against the first insulating ring 6. In this embodiment, the end of the first connecting body 102 has an extension extending toward the second connecting body 103, and the end of the second connecting body 103 has a protrusion extending toward the first connecting body 102. With this structure, the sealing surface of the first connecting body 102 and the first insulating ring 6 serves as the primary sealing surface. Therefore, the outward tilt angle of the first connecting body 102 can be slightly greater than the outward tilt angle of the second connecting body 103. For example, the outward tilt angle of the first connecting body 102 is 10°-15°, and the outward tilt angle of the second connecting body 103 is 5°-10°.

[0038] The second structural form uses a sealing ring 10, such as Figure 4 , Figure 5 As shown. In this embodiment, the first insulating ring 6 includes a first part and a second part, with a receiving cavity between the first part and the second part. The sealing ring 10 is disposed in the receiving cavity. The first connecting body 102 abuts against the outer flange 3, and the second connecting body 103 abuts against the inner flange 4. With this structural form, the first connecting body 102 and the second connecting body 103 do not need to be provided with inwardly extending protrusions or extensions. The outward tilt angle of the first connecting body 102 and the second connecting body 103 can be the same, both being 5°-15°.

[0039] The bolt is connected with an overload protection device 11 through a wire, which prevents lightning from hitting and causing current to break through the pipeline insulation joint, and also avoids the phenomenon that the current breaks through the pipeline insulation joint due to static electricity accumulation on the pipeline, and ensures the insulation function of the pipeline insulation joint.

[0040] The adaptive changes according to actual requirements are within the protection scope of the present application.

[0041] The principle and implementation mode of the present application are described by applying specific examples, and the above embodiment is only used for helping to understand the method and core idea of the present application; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A pipe insulation joint, characterized by The application relates to a sealing rubber ring for a first pipe body and a second pipe body, which are connected and have a first insulation ring between the first pipe body and the second pipe body, a sealing rubber ring is arranged between the connecting end of the first pipe body and the first insulation ring and between the connecting end of the second pipe body and the first insulation ring; the sealing rubber ring comprises a rubber ring main body and first and second connecting bodies connected to the two ends of the rubber ring main body, the first and second connecting bodies are connected to the rubber ring main body in a U-shaped structure, spring sheets are arranged in the first and second connecting bodies, an elastic corrugated plate is arranged in the rubber ring main body, and the two ends of the elastic corrugated plate are connected to the spring sheets; in a natural state, the first and second connecting bodies are arranged to be inclined to the outside. The two ends of the elastic corrugated plate are connected to the spring sheets through arc-shaped plates which are arranged close to the edges of the rubber ring main body.

2. The pipe insulation joint of claim 1, wherein, The ends of the first pipe body and the second pipe body are connected to outer flanges and inner flanges respectively, the first insulation ring is arranged between the outer flanges and the inner flanges, the sealing rubber ring is arranged between the outer flanges and the first insulation ring and between the inner flanges and the first insulation ring, a hooking ring is arranged on the second pipe body, one end of the hooking ring is abutted against the axial end surface of the inner flange, and the other end of the hooking ring is connected to the outer flange.

3. The pipe insulation joint of claim 2, wherein, The hooking ring and the outer flange are connected through threads.

4. The pipe insulation joint of claim 2, wherein, Second, third and fourth insulation rings are arranged between the hooking ring and the outer flange, the second insulation ring is attached to the circumferential wall surface of the inner flange, the third insulation ring is attached to the axial wall surface of the inner flange, and the fourth insulation ring is attached to the circumferential wall surface of the inner flange and the circumferential wall surface of the second pipe body.

5. The pipe insulation joint of claim 4, wherein, In the tightening direction of the hooking ring, the end inner circumferential wall surface of the hooking ring is in a tapered shape with gradually increasing diameter, and the outer wall surface of the fourth insulation ring is in a tapered shape with gradually increasing diameter and is matched with the end inner circumferential wall surface of the hooking ring.

6. The pipe insulation joint of claim 2, wherein, The outer flanges and the first insulation ring and the inner flanges and the insulation ring are provided with accommodating cavities, the sealing rubber ring is arranged in the accommodating cavities, the first connecting body is abutted against the inner flange or the outer flange, and the second connecting body is abutted against the first insulation ring.

7. The pipe insulation joint of claim 6, wherein, The end of the first connecting body is provided with an extension extending towards the second connecting body, and the end of the second connecting body is provided with a protrusion extending towards the first connecting body.

8. The pipe insulation joint of claim 2, wherein, The first insulation ring comprises first and second parts, the first and second parts are provided with an accommodating cavity, the sealing rubber ring is arranged in the accommodating cavity, the first connecting body is abutted against the outer flange, and the second connecting body is abutted against the inner flange.

9. The pipe insulation joint of claim 1, wherein, An overload protection device is electrically connected between the first pipe body and the second pipe body.

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