Corrosion-resistant thin-wall stainless steel seamless steel pipe for boiler

Abstract

The utility model discloses a corrosion-resistant thin-wall stainless steel seamless steel pipe for a boiler, which relates to the field of boiler water pipes, and comprises an inner pipe, the outer end of the inner pipe is connected with a fixing frame, the outer end of the fixing frame is connected with an outer pipe, and the outer end of the outer pipe is connected with an air suction pipe. The outer end of the inner pipe is connected with a water hammer eliminating pipe, and the side end of the inner pipe is connected with an inserting ring. When the two water conveying pipes are connected, the inserting pipe is inserted into the inner pipe, under the action of the first sealing ring and the second sealing ring, the joint of the two water conveying pipes is sealed in a double-layer mode, the sealing ends are not located on the same plane, connection is tight, and the sealing performance is good; the whole water conveying pipe has heat preservation and heat insulation effects, the heat preservation performance is good, heat loss of water flow can be effectively reduced, and therefore the energy utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler water pipes, and particularly relates to a corrosion-resistant thin-walled stainless steel seamless pipe for boilers. Background Art

[0002] A boiler is an energy conversion device that uses the heat energy released by fuel combustion or other heat energy to heat the working medium water or other fluids to a certain parameter, and transports the hot water into other mechanical equipment to work. When transporting hot water, a water pipe is required, and seamless steel pipes with good corrosion resistance and light weight are generally selected for the water pipe.

[0003] However, for the existing seamless steel pipes used for boiler water transportation, when connecting two water pipes, it is generally flange docking, and a sealing ring is arranged inside. However, the butting joints of the two water pipes are relatively flat, which is not convenient for docking, and relying solely on one sealing ring, the sealing effect is not good; in order to reduce heat loss during water transportation, heat preservation cotton is wrapped around the outer end of the water pipe. However, at the connection of the two water pipes, due to the existence of the flange, it is generally not wrapped, and there is no full-course heat preservation, and a large amount of heat will overflow from the connection, resulting in large heat loss.

[0004] In order to solve the technical problem, the utility model provides a corrosion-resistant thin-walled stainless steel seamless pipe for boilers. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a corrosion-resistant thin-walled stainless steel seamless pipe for boilers, which can effectively solve the problems mentioned in the background art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A corrosion-resistant thin-walled stainless steel seamless pipe for boilers, including an inner pipe, a fixing frame is connected to the outer end of the inner pipe, an outer pipe is connected to the outer end of the fixing frame, an air suction pipe is connected to the outer end of the outer pipe, a water hammer elimination pipe is connected to the outer end of the inner pipe, an insertion ring is connected to the side end of the inner pipe, an outer ring is connected to the side end of the outer pipe, a first sealing ring is connected to the inner side of the insertion ring, a slot is formed between the outer ring and the inner pipe, a second sealing ring is arranged in the slot, a plug-in pipe is connected to the side end of the inner pipe, a first connecting plate and a second connecting plate are connected to the outer end of the outer pipe, an outer protective shell is connected to the side end of the second connecting plate, and a heat insulation block is connected between the outer protective shell and the outer ring.

[0008] Preferably, the inner pipe is a stainless steel seamless pipe, which is composed of iron, chromium, and nickel alloy elements. A vacuum cavity is formed between the inner pipe and the outer pipe, the fixing frame is located in the vacuum cavity, and the air suction pipe is communicated with the vacuum cavity.

[0009] Preferably, the lower end of the water hammer elimination pipe is communicated with the inner pipe, the water hammer elimination pipe is connected to the outer pipe, the insertion ring is connected to the outer end of the inner pipe, and the insertion ring can be inserted into the slot and connected to the second sealing ring.

[0010] Preferably, the insertion pipe is connected to the inner wall of the inner pipe, the side end of the insertion pipe is an inclined side, and it can be inserted into the inner pipe and connected to the first sealing ring.

[0011] Preferably, the first connecting plate and the second connecting plate are respectively connected to both ends of the outer pipe, and connecting holes are formed inside them, and a bolt rod is connected in the connecting holes.

[0012] Preferably, a piston block is slidably connected in the water hammer elimination pipe, two rubber sealing rings are connected to the outer end of the piston block, and the rubber sealing rings are slidably connected to the inner wall of the water hammer elimination pipe.

[0013] Preferably, a pressure spring is connected to the upper end of the piston block, the upper end of the pressure spring is connected inside the water hammer elimination pipe, a discharge hole is formed in the water hammer elimination pipe, and a track rod is connected in the water hammer elimination pipe, and the track rod is slidably connected in the piston block.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the utility model, by providing an insertion ring, a slot, a first connecting plate and a second connecting plate, when connecting two water delivery pipes, the insertion ring of one water delivery pipe is inserted into the slot of the other water delivery pipe. At this time, the insertion pipe will be inserted into the inner pipe, the insertion ring is connected to the second sealing ring, and the insertion pipe is connected to the first sealing ring, so as to connect the two inner pipes. The first connecting plate and the second connecting plate are connected together by bolts, so as to connect and fix the two water delivery pipes together. Under the action of the first sealing ring and the second sealing ring, the connection part of the two water delivery pipes will be double-sealed, and the sealing ends are not on the same plane, and the connection is tight and the sealing performance is good.

[0016] In the utility model, by providing a vacuum cavity between the outer pipe and the inner pipe, the heat loss of the water flow flowing in the inner pipe can be effectively reduced. By providing a heat insulation block in the outer protective shell, the heat insulation block is located at the connection part of the two conveying pipes, and it has a heat preservation effect, which can effectively reduce the heat loss of the water flow at the connection part of the water delivery pipes. In this way, the whole water delivery pipe has a heat preservation and heat insulation effect, its heat preservation performance is good, and the heat loss of the water flow can be effectively reduced, thereby improving the energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a corrosion-resistant thin-walled stainless steel seamless steel pipe for a boiler of the utility model;

[0018] Figure 2Schematic diagram of the insertion ring structure of a corrosion-resistant thin-walled stainless steel seamless steel pipe for a boiler according to the present utility model;

[0019] Figure 3 Schematic diagram of the cross-sectional structure of the insertion pipe of a corrosion-resistant thin-walled stainless steel seamless steel pipe for a boiler according to the present utility model;

[0020] Figure 4 Schematic diagram of the cross-sectional structure of a corrosion-resistant thin-walled stainless steel seamless steel pipe for a boiler according to the present utility model;

[0021] Figure 5 For a corrosion-resistant thin-walled stainless steel seamless steel pipe for a boiler according to the present utility model Figure 4 Schematic diagram of area A;

[0022] Figure 6 For a corrosion-resistant thin-walled stainless steel seamless steel pipe for a boiler according to the present utility model Figure 4 Schematic diagram of area B.

[0023] In the figure: 1, inner pipe; 2, fixing frame; 3, outer pipe; 4, suction pipe; 5, water hammer elimination pipe; 501, piston block; 502, rubber sealing ring; 503, pressure spring; 504, discharge hole; 505, track rod; 6, insertion ring; 7, outer ring; 8, first sealing ring; 9, slot; 10, second sealing ring; 11, insertion pipe; 12, first connecting plate; 13, second connecting plate; 14, outer protective shell; 15, heat insulation block; 16, connecting hole. Detailed implementation manners

[0024] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation manners.

[0025] As Figures 1-6 shown, a corrosion-resistant thin-walled stainless steel seamless steel pipe for a boiler includes an inner pipe 1. The inner pipe 1 is a stainless steel seamless steel pipe, which is composed of iron, chromium, and nickel alloy elements. These elements can form a dense oxide film, effectively preventing the inner pipe 1 from rusting. At the same time, the inner pipe 1 can have high strength and hardness, can withstand large external forces and pressures, and has good durability and stability.

[0026] A fixing bracket 2 is connected to the outer end of the inner pipe 1, and an outer pipe 3 is connected to the outer end of the fixing bracket 2. The fixing bracket 2 is used to connect and fix the inner pipe 1 and the outer pipe 3 together. A vacuum cavity is formed between the inner pipe 1 and the outer pipe 3. The fixing bracket 2 is located in this vacuum cavity. The vacuum cavity blocks the heat transfer path by means of vacuum to achieve the heat preservation effect. At the same time, it has no weight and can effectively reduce the overall weight of the water delivery pipe, thus making transportation and installation more convenient. An air suction pipe 4 is connected to the outer end of the outer pipe 3. The air suction pipe 4 is communicated with the vacuum cavity. By connecting the air suction pipe 4 with a vacuum pump, the vacuum pump can pump out the air in the cavity between the inner pipe 1 and the outer pipe 3.

[0027] A water hammer elimination pipe 5 is connected to the outer end of the inner pipe 1. The lower end of the water hammer elimination pipe 5 is communicated with the inner pipe 1. The water hammer elimination pipe 5 is connected to the outer pipe 3. The water hammer elimination pipe 5 can effectively offset the water hammer phenomenon caused by reasons such as sudden closing or opening of the valve. A piston block 501 is slidably connected in the water hammer elimination pipe 5. Two rubber sealing rings 502 are connected to the outer end of the piston block 501. The rubber sealing rings 502 are slidably connected to the inner wall of the water hammer elimination pipe 5. The rubber sealing rings 502 can seal the lower end of the water hammer elimination pipe 5. A pressure spring 503 is connected to the upper end of the piston block 501. The upper end of the pressure spring 503 is connected inside the water hammer elimination pipe 5. The pressure spring 503 is used to provide a counteracting force for the piston block 501. A discharge hole 504 is opened in the water hammer elimination pipe 5. When the air pressure in the water delivery pipe is too high, at this time the piston block 501 will be pushed to the upper end of the discharge hole 504, so that the gas can be discharged from the discharge hole 504 to avoid bursting of the inner pipe 1 due to excessive air pressure. A track rod 505 is connected inside the water hammer elimination pipe 5. The track rod 505 is slidably connected in the piston block 501. The track rod 505 is used to enable the piston block 501 to move smoothly inside the water hammer elimination pipe 5.

[0028] An insertion ring 6 is connected to the side end of the inner pipe 1. The insertion ring 6 is connected to the outer end of the inner pipe 1. An outer ring 7 is connected to the side end of the outer pipe 3. A first sealing ring 8 is connected to the inner side of the insertion ring 6. A slot 9 is formed between the outer ring 7 and the inner pipe 1. A second sealing ring 10 is arranged in the slot 9. The insertion ring 6 can be inserted into the slot 9 and is connected to the second sealing ring 10. A plugging pipe 11 is connected to the side end of the inner pipe 1. The plugging pipe 11 is connected to the inner wall of the inner pipe 1. The side end of the plugging pipe 11 is a bevel and can be inserted into the inner pipe 1. In this way, the water flow will be conveyed to another inner pipe 1 through the plugging pipe 11. When two water delivery pipes are connected, the insertion ring 6 will be connected to the first sealing ring 8, and the plugging pipe 11 will be connected to the second sealing ring 10. With the cooperation of the two, the sealing performance of the inner pipe 1 can be effectively improved.

[0029] The outer end of the outer pipe 3 is connected with a first connecting plate 12 and a second connecting plate 13. The first connecting plate 12 and the second connecting plate 13 are respectively connected to both ends of the outer pipe 3, and connection holes 16 are formed inside them. A bolt rod is connected in the connection hole 16. Through the connection hole 16 and the bolt, the first connecting plate 12 and the second connecting plate 13 can be connected together, thereby connecting and fixing the two water delivery pipes together. A side end of the second connecting plate 13 is connected with an outer protective shell 14. An insulating block 15 is connected between the outer protective shell 14 and the outer ring 7. The outer protective shell 14 is used to protect the insulating block 15. The insulating block 15 is located at the connection of the two water delivery pipes and can insulate the connection between the two to prevent heat from escaping from this connection.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant thin-walled stainless steel seamless tube for boiler, comprising an inner tube (1), characterized in that: The outer end of the inner tube (1) is connected to a fixing frame (2), the outer end of the fixing frame (2) is connected to an outer tube (3), the outer end of the outer tube (3) is connected to an air intake pipe (4), the outer end of the inner tube (1) is connected to a water hammer elimination pipe (5), the side end of the inner tube (1) is connected to an insert ring (6), the side end of the outer tube (3) is connected to an outer ring (7), the inner side of the insert ring (6) is connected to a first sealing ring (8), a slot (9) is formed between the outer ring (7) and the inner tube (1), a second sealing ring (10) is arranged in the slot (9), the side end of the inner tube (1) is connected to an insert pipe (11), the outer end of the outer tube (3) is connected to a first connecting plate (12) and a second connecting plate (13), the side end of the second connecting plate (13) is connected to an outer protective shell (14), and a heat insulation block (15) is connected between the outer protective shell (14) and the outer ring (7).

2. The corrosion-resistant thin-walled stainless steel seamless pipe for boiler according to claim 1, characterized in that: The inner tube (1) is a stainless steel seamless tube composed of iron, chromium and nickel alloy elements. A vacuum cavity is formed between the inner tube (1) and the outer tube (3). The fixing frame (2) is located in the vacuum cavity. The air intake pipe (4) is connected to the vacuum cavity.

3. The corrosion-resistant thin-walled stainless steel seamless pipe for boiler according to claim 1, characterized in that: The lower end of the water hammer elimination tube (5) is in communication with the inner tube (1), the water hammer elimination tube (5) is connected to the outer tube (3), the insert ring (6) is connected to the outer end of the inner tube (1), the insert ring (6) can be inserted into the slot (9), and is connected to the second sealing ring (10).

4. The corrosion-resistant thin-walled stainless steel seamless pipe for boiler according to claim 1, characterized in that: The insert tube (11) is connected to the inner wall of the inner tube (1); the side end of the insert tube (11) is a bevel and can be inserted into the inner tube (1) and connected to the first sealing ring (8).

5. The corrosion-resistant thin-walled stainless steel seamless pipe for boiler according to claim 1, characterized in that: The first connecting plate (12) and the second connecting plate (13) are respectively connected to the two ends of the outer tube (3), and are both provided with connecting holes (16) inside, wherein the connecting holes (16) are connected with bolt rods.

6. The corrosion-resistant thin-walled stainless steel seamless pipe for boiler according to claim 1, characterized in that: A piston block (501) is slidably connected inside the water hammer elimination tube (5), and two rubber sealing rings (502) are connected to the outer end of the piston block (501), and the rubber sealing rings (502) are slidably connected to the inner wall of the water hammer elimination tube (5).

7. The corrosion-resistant thin-walled stainless steel seamless pipe for boiler according to claim 6, characterized in that: The upper end of the piston block (501) is connected to a pressure spring (503), the upper end of the pressure spring (503) is connected to a water hammer elimination pipe (5), a discharge hole (504) is provided in the water hammer elimination pipe (5), a track rod (505) is connected to the water hammer elimination pipe (5), and the track rod (505) is slidably connected to the piston block (501).

Images