Pumping type pipeline connecting assembly

Abstract

The utility model discloses a pumping type pipeline connecting assembly and relates to the technical field of boiler pipelines. The pumping type pipeline connecting assembly comprises a first connecting piece, one side of the first connecting piece is used for being connected with a first pipeline, and one side of the first connecting piece is used for being connected with a second connecting piece; a first annular groove, a second annular groove and a third annular groove are formed in the side wall, used for being connected with the second connecting piece, of the first connecting piece, the first annular groove is located on the outer side of the second annular groove, the third annular groove is located on the inner side of the second annular groove, a first sealing piece is arranged in the second annular groove, and a second sealing piece is arranged in the third annular groove. A first memory alloy ring is arranged in the first annular groove, and a second memory alloy ring is arranged in the third annular groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler pipeline technical field, especially a kind of pumping type pipeline connecting assembly. BACKGROUND

[0002] In the boiler pipeline technical field, pumping type pipeline connecting assembly is the key component to ensure the stable operation of system. With the continuous expansion of industrial production scale and the gradual improvement of energy utilization efficiency requirement, the operating condition of boiler is increasingly complex, and higher challenge is put forward to the performance of pipeline connecting assembly.

[0003] The traditional pumping type pipeline connecting assembly usually adopts simple sealing structure, such as ordinary rubber sealing ring matched with mechanical compression device to realize the sealing connection between pipelines. However, in the actual boiler operation process, the temperature and pressure of medium in pipeline will frequently and greatly fluctuate. When the temperature rises, the size of pipeline will change due to thermal expansion, and the traditional sealing structure is difficult to adapt to such change, which is easy to cause sealing failure and induce medium leakage. SUMMARY

[0004] To solve the problem of sealing failure and medium leakage caused by the size change of pipeline due to thermal expansion when the temperature rises in the prior art, the utility model provides a pumping type pipeline connecting assembly.

[0005] The technical scheme adopted by the utility model is:

[0006] A pumping type pipeline connecting assembly, comprising a first connecting piece, one side of the first connecting piece is used for connecting a first pipeline, and one side of the first connecting piece is used for connecting a second connecting piece; a first annular groove, a second annular groove and a third annular groove are formed in the side wall of the first connecting piece for connecting the second connecting piece, the first annular groove is located outside the second annular groove, the third annular groove is located inside the second annular groove, a first sealing piece is arranged in the second annular groove, a first memory alloy ring is arranged in the first annular groove, and a second memory alloy ring is arranged in the third annular groove.

[0007] Preferably, a first protruding ring and a second protruding ring are arranged on the side wall of the second connecting piece for connecting the first connecting piece, the first protruding ring is used for embedding in the first annular groove, and the second protruding ring is used for embedding in the third annular groove.

[0008] Preferably, a fourth annular groove is formed in the first protruding ring, a second sealing piece is arranged in the fourth annular groove, and the second sealing piece is used for abutting against the first memory alloy ring.

[0009] Preferably, the fifth annular groove is arranged on the second convex ring, and a third sealing member is arranged in the fifth annular groove, and the third sealing member is used for abutting against the second memory alloy ring.

[0010] Preferably, the other side of the second connecting member is connected with a valve, and the other side of the valve is used for connecting a second pipeline.

[0011] Preferably, the inner diameter of the first memory alloy ring is smaller than the outer diameter of the first annular groove.

[0012] Preferably, the inner diameter of the second memory alloy ring is smaller than the outer diameter of the third annular groove.

[0013] Preferably, the first sealing member is a graphene coating sealing ring.

[0014] The utility model discloses beneficial effects are: when the boiler operation, the medium temperature fluctuation in pipeline, and the first memory alloy ring and the second memory alloy ring can play shape memory effect and superelasticity. When temperature rises, the second memory alloy ring expands by heat, and the third annular groove wall produces extrusion pressure outward, and through the first connecting member transmission to the second annular groove, makes the first sealing member be extruded, and tightly fits the wall, fills the gap that produces because pipeline thermal expansion, avoids sealing failure and medium leakage;When temperature reduces, the first memory alloy ring contracts, and the first annular groove wall produces the tension inward, and also transmission to the second annular groove and act on the first sealing member, make the first sealing member be extruded, and tightly fits the wall, makes up the gap that produces because pipeline cold contraction, improves sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the explosion cross section structure schematic drawing of first connecting member in the utility model embodiment;

[0016] Figure 2 It is the structure schematic drawing of first connecting member, second connecting member and valve in the utility model embodiment;

[0017] Figure 3 It is the explosion structure schematic drawing of first connecting member, first convex ring, second convex ring and second connecting member in the utility model embodiment;

[0018] Figure 4 It is the explosion cross section structure schematic drawing of first convex ring, second convex ring and second connecting member in the utility model embodiment.

[0019] 1, first connecting piece; 101, first annular groove; 102, second annular groove; 103, third annular groove; 2, first pipeline; 3, second connecting piece; 301, first protruding ring; 302, second protruding ring; 303, fourth annular groove; 304, fifth annular groove; 4, first sealing piece; 5, first memory alloy ring; 6, second memory alloy ring; 7, second sealing piece; 8, third sealing piece; 9, valve; 10, second pipeline. DETAILED DESCRIPTION

[0020] In order to make the purpose, scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with examples and drawings, and the illustrative embodiment of the utility model and its description are only used to explain the utility model and not as a limitation on the utility model.

[0021] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the utility model. However, it will be apparent to one of ordinary skill in the art that the utility model can be practiced without these specific details. In other instances, well-known structures, circuits, materials or processes have not been described in detail in order to avoid obscuring the utility model.

[0022] In the entire description, the mention of "one embodiment", "an embodiment", "one example" or "an example" means that the specific features, structures or characteristics described in connection with the embodiment or example are included in at least one embodiment of the utility model. Therefore, the phrases "one embodiment", "an embodiment", "one example" or "an example" appearing in various places throughout the description are not necessarily all referring to the same embodiment or example. In addition, specific features, structures or characteristics can be combined in one or more embodiments or examples in any appropriate combination and / or sub-combination. In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only and the drawings are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items.

[0023] In the description of the utility model, the orientation or position relationship indicated by the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the utility model.

[0024] The embodiment provides a pumping type pipeline connecting assembly, such as Figure 1As shown, it comprises a first connecting piece 1, one side of which is used to connect a first pipeline 2, and the other side is used to connect a second connecting piece 3; a first annular groove 101, a second annular groove 102 and a third annular groove 103 are arranged on the side wall of the first connecting piece 1 used to connect the second connecting piece 3, the first annular groove 101 is located outside the second annular groove 102, the third annular groove 103 is located inside the second annular groove 102, a first sealing piece 4 is arranged in the second annular groove 102, a first memory alloy ring 5 is arranged in the first annular groove 101, and a second memory alloy ring 6 is arranged in the third annular groove 103.

[0025] By reference, the first annular groove 101 is provided with the first memory alloy ring 5, which is made of nickel-titanium alloy material, and the shape memory transition temperature range is 0-80℃, so that the shape change can be quickly and stably realized within the common temperature fluctuation range of the pipeline, and the third annular groove 103 is provided with the second memory alloy ring 6, which is also made of nickel-titanium alloy material, and the shape memory transition temperature range is the same as that of the first memory alloy ring 5.

[0026] By reference, the first annular groove 101 is provided with the first memory alloy ring 5, which is made of nickel-titanium alloy material, and the shape memory transition temperature range is 0-80℃, so that the shape change can be quickly and stably realized within the common temperature fluctuation range of the pipeline, and the third annular groove 103 is provided with the second memory alloy ring 6, which is also made of nickel-titanium alloy material, and the shape memory transition temperature range is the same as that of the first memory alloy ring 5.

[0027] In order to prevent displacement of the memory alloy ring due to factors such as medium flow and vibration during pipeline operation, so as to accurately generate extrusion force on the annular groove wall, and further affect the pressure regulation and sealing effect of the first sealing piece 4. In one possible implementation, the inner diameter of the first memory alloy ring 5 is smaller than the outer diameter of the first annular groove 101, and it is sleeved into the first annular groove 101 after expansion by a tool. The inner diameter of the second memory alloy ring 6 is smaller than the outer diameter of the third annular groove 103, and it is sleeved into the third annular groove 103 after expansion by a tool. The smaller inner diameter makes the memory alloy ring tightly fit the groove wall after being sleeved into the annular groove by the tool expansion, providing sufficient friction force to prevent displacement and ensure stable position during operation.

[0028] In the specific application process, when the temperature of the medium in the pumping pipeline rises, the second memory alloy ring 6 in the third annular groove 103 begins to expand due to heating, which will generate an outward extrusion force on the groove wall of the third annular groove 103. Because the first connecting piece 1 is a whole structure, this extrusion force will be transmitted to the second annular groove 102 through the groove wall of the third annular groove 103. As the second memory alloy ring 6 continues to expand, the extrusion force applied to the first sealing piece 4 (i.e. the graphene coating sealing ring) gradually increases, so that the first sealing piece 4 is tightly fitted with the groove wall of the second annular groove 102. The tight fitting of the first sealing piece 4 with the groove wall and the surface of the connecting piece effectively fills the small gap caused by the thermal expansion of the pipeline, thereby ensuring good sealing effect.

[0029] When the temperature of the medium in the pumping pipeline decreases, the first memory alloy ring 5 in the first annular groove 101 begins to shrink. During the shrinking process, it will generate an inward pulling force on the groove wall of the first annular groove 101, which will be transmitted to the second annular groove 102 through the groove wall of the first annular groove 101 and act on the first sealing piece 4. As the first memory alloy ring 5 continues to shrink, the extrusion force applied to the first sealing piece 4 gradually increases, further pushing the first sealing piece 4 to be tightly fitted with the groove wall of the second annular groove 102 and the surface of the abutting second connecting piece 3. When the temperature decreases, the pipeline will generate small gaps due to cold shrinkage, and the tighter fitting of the first sealing piece 4 with the groove wall and the surface of the connecting piece can effectively compensate for these gaps, thereby ensuring good sealing effect.

[0030] In a possible implementation manner, as shown in Figure 2 the other side of the second connecting piece 3 is connected with a valve 9, and the other side of the valve 9 is used to connect a second pipeline 10.

[0031] For reference, one side of the first connecting piece 1 is connected with the first pipeline 2 by welding, and the other side of the second connecting piece 3 is connected with the valve 9 by flange connection, and a sealing gasket is arranged at the flange connection position to further ensure the sealing performance. The valve 9 is a ball valve with strong corrosion resistance, which can effectively control the flow and on-off of the chemical raw materials. The other side of the valve 9 is also connected with the second pipeline 10 by flange connection. The bolts pass through the corresponding bolt holes of the first connecting piece 1 and the second connecting piece 3 to tightly connect them.

[0032] In a possible implementation manner, as shown in Figure 3 the side wall of the second connecting piece 3 used to connect the first connecting piece 1 is provided with a first protruding ring 301 and a second protruding ring 302, the first protruding ring 301 is used to be embedded in the first annular groove 101, and the second protruding ring 302 is used to be embedded in the third annular groove 103.

[0033] In the specific application process, after the first connecting piece 1 and the second connecting piece 3 are connected, the first protruding ring 301 is embedded into the first annular groove 101 to limit the first memory alloy, and the second protruding ring 302 is embedded into the third annular groove 103 to limit the second memory alloy, so as to prevent the memory alloy from being separated from the annular groove during the pipeline operation.

[0034] In a possible implementation, as shown in the figure, the first protruding ring 301 is provided with a fourth annular groove 303, and the fourth annular groove 303 is provided with a second sealing piece 7, which is used to abut against the first memory alloy ring 5. The second protruding ring 302 is provided with a fifth annular groove 304, and the fifth annular groove 304 is provided with a third sealing piece 8, which is used to abut against the second memory alloy ring 6. Figure 4

[0035] For reference, the second sealing piece 7 abuts against the first memory alloy ring 5, and the third sealing piece 8 abuts against the second memory alloy ring 6, so as to form an additional sealing layer. During the pipeline operation, even if the first sealing piece 4 (graphene coating sealing ring) has a slight leakage, the second sealing piece 7 and the third sealing piece 8 can effectively prevent further leakage of the medium, thereby improving the sealing performance of the entire connecting assembly. The second sealing piece 7 and the third sealing piece 8 can be fluorine rubber sealing rings.

[0036] The above-described embodiments only express the specific implementation of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.​

Claims

1. A pump and go pipe coupling assembly, characterized by, The utility model provides a connecting piece, which comprises a first connecting piece (1), one side of the first connecting piece (1) is used for connecting a first pipeline (2), and one side of the first connecting piece (1) is used for connecting a second connecting piece (3); a first annular groove (101), a second annular groove (102) and a third annular groove (103) are formed in the side wall of the first connecting piece (1) for connecting the second connecting piece (3), the first annular groove (101) is located outside the second annular groove (102), the third annular groove (103) is located inside the second annular groove (102), a first sealing piece (4) is arranged in the second annular groove (102), a first memory alloy ring (5) is arranged in the first annular groove (101), and a second memory alloy ring (6) is arranged in the third annular groove (103).

2. A pump-assisted pipe coupling assembly according to claim 1, wherein, The second connecting piece (3) is arranged with a first protruding ring (301) and a second protruding ring (302) on the side wall for connecting the first connecting piece (1), the first protruding ring (301) is used for being embedded in the first annular groove (101), and the second protruding ring (302) is used for being embedded in the third annular groove (103).

3. A pump-assisted pipe coupling assembly according to claim 2, wherein, A fourth annular groove (303) is formed in the first protruding ring (301), and a second sealing piece (7) is arranged in the fourth annular groove (303) and used for abutting against the first memory alloy ring (5).

4. A pump-assisted pipe coupling assembly according to claim 3, wherein, A fifth annular groove (304) is formed in the second protruding ring (302), a third sealing piece (8) is arranged in the fifth annular groove (304) and used for abutting against the second memory alloy ring (6).

5. A pump-assisted pipe coupling assembly according to claim 2, wherein, The second connecting piece (3) is connected with a valve (9) on the other side, and the other side of the valve (9) is used for connecting a second pipeline (10).

6. A pump-assisted pipe coupling assembly according to claim 1, wherein, The inner diameter of the first memory alloy ring (5) is smaller than the outer diameter of the first annular groove (101).

7. A pump-assisted pipe coupling assembly according to claim 1, wherein, The inner diameter of the second memory alloy ring (6) is smaller than the outer diameter of the third annular groove (103).

8. A pump-assisted pipe coupling assembly according to claim 1, wherein, The first sealing piece (4) is a graphene coating sealing ring.

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