Corrosion-resistant and wear-resistant stainless steel pipe for small-caliber thick-wall conveying pipeline

Abstract

The utility model provides a corrosion-resistant and wear-resistant stainless steel pipe for a small-caliber thick-wall conveying pipeline, which comprises a small-caliber pipe body, a water hammer absorbing device, a one-way valve and a pressure reducing pipeline, the two ends of the pressure reducing pipeline are respectively communicated with the small-caliber pipe body and the water hammer absorbing device through the one-way valves; according to the utility model, the water hammer absorber is introduced, so that the pressure fluctuation in the pipeline is effectively adjusted. The piston head in the water hammer absorber can flexibly move along with the change of pressure to absorb pressure waves and reduce the impact on a pipeline. When the pressure is too high, the liquid rapidly reduces the pressure through the pressure reducing pipeline, and the water hammer effect is weakened. Meanwhile, the one-way valve ensures one-way water flow and prevents reverse flow.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipes, and particularly relates to a corrosion-resistant and wear-resistant stainless steel pipe for a small-diameter thick-walled conveying pipeline. Background Art

[0002] Small-diameter thick-walled steel pipe, as the name implies, refers to a steel pipe with a smaller diameter but thicker wall. It has high strength and toughness, is made of high-quality steel, and has excellent compressive resistance.

[0003] The pressure performance of water hammer effect in small-diameter pipes is affected by many factors. When the valve is suddenly closed or opened, the inertia of the water flow will cause pressure fluctuations in the pipe, which is the water hammer effect. In small-diameter pipes, due to the small diameter of the pipe, the velocity of the water flow may change more dramatically, so the pressure fluctuation caused by the water hammer effect may be more obvious.

[0004] At present, small-diameter thick-walled steel pipes mainly rely on their own strength to resist the strong pressure caused by the water hammer effect. However, as time goes by and the corrosion in the external environment continues to intensify, the pressure resistance of this steel pipe will gradually weaken, and it may eventually be unable to withstand the strong pressure generated by the water hammer effect, causing the steel pipe to break. Once the steel pipe is broken, the liquid transported inside it will leak out, which may not only pollute the environment, but also pose a serious threat to people's lives and property safety.

[0005] Therefore, it is very necessary to invent a corrosion-resistant and wear-resistant stainless steel pipe for small-diameter thick-walled conveying pipeline. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a corrosion-resistant and wear-resistant stainless steel pipe for a small-diameter thick-walled conveying pipeline, comprising a small-diameter pipe body, a water hammer absorber, a one-way valve and a pressure reducing pipeline, wherein the water hammer absorber is fixedly installed on the small-diameter pipe body, and both ends of the pressure reducing pipeline are respectively connected to the small-diameter pipe body and the water hammer absorber through the one-way valve;

[0007] The water hammer absorber includes a fixed sleeve, an elimination vertical pipe, a booster air pump, a dynamic balancing head and a limit ring seat. The fixed sleeve is fixedly installed on the small-diameter pipe body, the elimination vertical pipe is fixedly installed on the fixed sleeve, the booster air pump is fixedly installed on the top of the elimination vertical pipe, the dynamic balancing head is slidably installed inside, and the limit ring seat is fixedly installed at the bottom inside; the elimination vertical pipe is connected to the pressure reducing pipeline through the one-way valve.

[0008] Preferably, the small-diameter tube body is a small-diameter thick-walled steel tube, the inner and outer surfaces of the small-diameter tube body are respectively provided with a phosphating layer and a passivation layer, flanges are fixedly installed at both ends of the small-diameter tube body, and the small-diameter tube body is connected to the inside of the elimination vertical pipe.

[0009] Preferably, the vertical elimination pipe and the small-diameter pipe body are in a vertical relationship, and a pressure meter is provided on one side of the booster air pump installed on the top of the vertical elimination pipe.

[0010] Preferably, the dynamic balancing head is a piston head made of hard rubber as a whole, and a plurality of rubber sealing rings are arranged on the outer surface of the dynamic balancing head. The dynamic balancing head is located below the connection point between the vertical elimination pipe and the one-way valve.

[0011] Preferably, the limiting ring seat is located below the dynamic balancing head, and the limiting ring seat is an annular structure, and the limiting ring seat does not allow the dynamic balancing head to enter the interior of the small-diameter tube body.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model innovatively introduces a water hammer absorber, in which the piston head cleverly arranged inside can flexibly move up and down when the water flow pressure fluctuates, thereby achieving dynamic balance of the system. Specifically, when the pressure suddenly increases, the piston head will be pushed upward, and then move upward and squeeze the air above, thereby effectively absorbing part of the pressure wave and greatly reducing the impact on the pipeline. When the pressure decreases, the piston head can naturally drop and return to its original position.

[0014] What is more worth mentioning is that when the pressure wave exceeds the processing capacity of the piston head, part of the liquid will be guided into the pressure reducing pipe. This design helps to quickly reduce the pressure in the steel pipe and further weaken the adverse effects of the water hammer effect. In addition, the liquid entering the pressure reducing pipe will flow back into the steel pipe through the one-way valve later. This process ensures that the water flow always flows in the predetermined direction and effectively prevents the backflow of water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a partial cross-sectional structural schematic diagram of the water hammer absorber of the utility model.

[0017] In the figure:

[0018] Small-diameter pipe body 1, water hammer absorber 2, fixed sleeve 21, vertical pipe 22, booster air pump 23, dynamic balancing head 24, limit ring seat 25, one-way valve 3, pressure reducing pipeline 4. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0020] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0021] As attached Figure 1 To Attachment Figure 2 As shown:

[0022] The utility model provides a corrosion-resistant and wear-resistant stainless steel pipe for a small-diameter thick-walled conveying pipeline, comprising a small-diameter pipe body 1, a water hammer absorber 2, a one-way valve 3 and a pressure reducing pipeline 4, wherein the water hammer absorber 2 is fixedly installed on the small-diameter pipe body 1, and both ends of the pressure reducing pipeline 4 are respectively connected to the small-diameter pipe body 1 and the water hammer absorber 2 through the one-way valve 3.

[0023] The water hammer absorber 2 includes a fixed sleeve 21, an elimination vertical pipe 22, a booster air pump 23, a dynamic balancing head 24 and a limit ring seat 25. The fixed sleeve 21 is fixedly installed on the small-diameter pipe body 1, the elimination vertical pipe 22 is fixedly installed on the fixed sleeve 21, the booster air pump 23 is fixedly installed on the top of the elimination vertical pipe 22, the dynamic balancing head 24 is slidably installed inside, and the limit ring seat 25 is fixedly installed at the bottom inside; the elimination vertical pipe 22 is connected to the pressure reducing pipeline 4 through the one-way valve 3, and the water hammer absorber 2 handles the intensity pressure generated by the water hammer effect by dynamically balancing and reducing the internal pressure of the small-diameter pipe body 1.

[0024] Embodiment 1:

[0025] Specifically, the small-diameter pipe body 1 is a small-diameter thick-walled steel pipe, and the inner and outer surfaces of the small-diameter pipe body 1 are respectively provided with a phosphating layer and a passivation layer, which greatly enhances its corrosion resistance and wear resistance. The flanges installed at both ends make the pipeline connection more convenient and firm, and the small-diameter pipe body 1 is connected to the inside of the vertical pipe 22.

[0026] Specifically, the vertical pipe 22 and the small-diameter pipe body 1 are in a vertical relationship, which not only ensures the stability of the structure, but also enables the water flow to form an effective buffer and diversion when passing through the water hammer absorber 2. The vertical installation of the vertical pipe 22 allows the dynamic balancing head 24 to move up and down more smoothly, so that it can respond to the change of water flow pressure more accurately. A pressure meter is provided on one side of the booster air pump 23 installed on the top of the vertical pipe 22.

[0027] Specifically, the dynamic balancing head 24 is a piston head made of hard rubber. A plurality of rubber sealing rings are provided on the outer surface of the dynamic balancing head 24 to ensure that it is tightly matched with the inner wall of the elimination vertical pipe 22 to prevent liquid leakage. The dynamic balancing head 24 is located below the connection point between the elimination vertical pipe 22 and the one-way valve 3.

[0028] Specifically, the limiting ring seat 25 is located below the dynamic balancing head 24 . The limiting ring seat 25 is an annular structure. The limiting ring seat 25 does not allow the dynamic balancing head 24 to enter the small-diameter tube body 1 , thereby preventing it from entering the small-diameter tube body 1 .

[0029] Embodiment 2:

[0030] When the water flow in the pipeline changes suddenly, such as the flow rate decreases due to the valve closing, the inertia of the water flow will cause the water flow to form a pressure wave, i.e., water hammer. At this time, the water hammer absorber 2 begins to play its role. When the pressure inside the pipeline increases, the dynamic balancing head 24 in the vertical pipe 22 is pushed upward and begins to move upward along the vertical pipe 22. Since the dynamic balancing head 24 is made of hard rubber and has good sealing and elasticity, it can effectively slide in the vertical pipe 22 and adjust its position according to the pressure change. The upward movement of the dynamic balancing head 24 will squeeze the air above the vertical pipe 22, and this part of the air is compressed and stored. At the same time, since a rubber sealing ring is provided between the dynamic balancing head 24 and the inner wall of the vertical pipe 22, it can be ensured that the liquid in the vertical pipe 22 will not leak. As the dynamic balancing head 24 moves, part of the energy of the pressure wave is converted into the mechanical energy of the dynamic balancing head 24, thereby achieving the buffering and absorption of the pressure wave. When the pressure inside the pipeline decreases, the dynamic balancing head 24 is forced downward and begins to move downward along the vertical pipe 22. At the same time, the booster air pump 23 can inject an appropriate amount of gas into the vertical elimination pipe 22 as needed to adjust the pressure in the pipeline. When the water hammer effect is particularly strong and the dynamic balancing head 24 cannot completely absorb the pressure wave, the excessive pressure will be introduced into the pressure reducing pipeline 4 through the one-way valve 3. The function of the one-way valve 3 is to ensure that the liquid can only flow in a specific direction and prevent the liquid from flowing back to the small-diameter pipe body 1. The pressure reducing pipeline 4 provides additional flow space for this part of the high-pressure liquid, thereby reducing the pressure in the small-diameter pipe body 1 and further reducing the impact of the water hammer effect on the pipeline.

[0031] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. A corrosion-resistant and wear-resistant stainless steel pipe for small-diameter thick-walled conveying pipeline, characterized in that: It comprises a small-diameter pipe body (1), a water hammer absorber (2), a one-way valve (3) and a pressure reducing pipeline (4), wherein the water hammer absorber (2) is fixedly mounted on the small-diameter pipe body (1), and the two ends of the pressure reducing pipeline (4) are respectively connected to the small-diameter pipe body (1) and the water hammer absorber (2) through the one-way valve (3); The water hammer absorber (2) comprises a fixed sleeve (21), an elimination vertical pipe (22), a booster air pump (23), a dynamic balancing head (24) and a limiting ring seat (25); the fixed sleeve (21) is fixedly mounted on the small-diameter pipe body (1); the elimination vertical pipe (22) is fixedly mounted on the fixed sleeve (21); the booster air pump (23) is fixedly mounted on the top of the elimination vertical pipe (22); the dynamic balancing head (24) is slidably mounted inside the elimination vertical pipe (22); and the limiting ring seat (25) is fixedly mounted at the bottom of the elimination vertical pipe (22); the elimination vertical pipe (22) is connected to the pressure reducing pipeline (4) through the one-way valve (3).

2. The corrosion-resistant and wear-resistant stainless steel pipe for small-diameter thick-walled conveying pipeline according to claim 1, characterized in that: The small-diameter tube body (1) is a small-diameter thick-walled steel tube. The inner and outer surfaces of the small-diameter tube body (1) are provided with a phosphating layer and a passivation layer respectively. Flanges are fixedly installed at both ends of the small-diameter tube body (1). The small-diameter tube body (1) is communicated with the interior of the vertical elimination tube (22).

3. The corrosion-resistant and wear-resistant stainless steel pipe for small-diameter thick-walled conveying pipeline according to claim 1, characterized in that: The elimination vertical pipe (22) and the small-diameter pipe body (1) are in a vertical relationship, and a pressure meter is provided on one side of the booster air pump (23) installed on the top of the elimination vertical pipe (22).

4. The corrosion-resistant and wear-resistant stainless steel pipe for small-diameter thick-walled conveying pipeline according to claim 1, characterized in that: The dynamic balancing head (24) is a piston head made of hard rubber as a whole. A plurality of rubber sealing rings are arranged on the outer surface of the dynamic balancing head (24). The dynamic balancing head (24) is located below the connection point between the elimination vertical pipe (22) and the one-way valve (3).

5. The corrosion-resistant and wear-resistant stainless steel pipe for small-diameter thick-walled transportation pipeline according to claim 1, characterized in that: The limiting ring seat (25) is located below the dynamic balancing head (24). The limiting ring seat (25) is an annular structure. The limiting ring seat (25) does not allow the dynamic balancing head (24) to enter the interior of the small-diameter pipe body (1).

Images