Oil blowing device for prestressed steel strand of LNG (Liquefied Natural Gas) storage tank

Abstract

The invention discloses an oil blowing device for a prestressed steel strand of an LNG (Liquefied Natural Gas) storage tank, which belongs to the technical field of LNG storage tank construction and comprises an oil inlet unit and an oil outlet unit, the oil inlet unit comprises an oil inlet cylinder, a pressurizing mechanism and an atomizing mechanism; the oil inlet cylinder is sleeved outside the steel strand at the tensioning driving end; an oil injection hole is formed in the upper side surface of the oil inlet cylinder; the pressurizing mechanism is arranged in the oil inlet cylinder and located between the air inlet hole and the oil injection hole. The atomization mechanism is arranged in the oil inlet cylinder and located on the inner side of the oil injection hole; the oil outlet unit comprises an oil outlet cylinder and an oil-gas separation mechanism; the oil outlet cylinder is sleeved outside the steel strand at the tensioning driven end, and the end part of the outer end is provided with an oil gas discharge port; and the oil-gas separation mechanism is arranged outside the oil-gas discharge port. According to the oil blowing device, the uniformity, continuity and high efficiency of oil blowing of the steel strand are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of LNG storage tank construction, and relates to a prestressed steel strand threading auxiliary device, and in particular to an oil blowing device for prestressed steel strands of LNG storage tanks. Background Art

[0002] In the construction process of liquefied natural gas (LNG) storage tanks, prestressed steel strands, as a key structural material, play a vital role. It can not only provide the necessary tension to ensure the stability and integrity of the tank structure, but also effectively resist the influence of external environmental changes and internal pressure, thereby ensuring the safe operation of the tank. The application of prestressed steel strands has irreplaceable value in improving the long-term reliability and service life of LNG storage tanks.

[0003] However, in the actual construction process, the strand threading process faces many challenges. Strand threading refers to the process of accurately passing the steel strands through the predetermined positions according to the design requirements. This process requires a high degree of technical precision and professional operating skills. When threading the strands, there will be inevitable friction between the steel strands and the inner wall of the pipeline or other components. This friction may not only cause scratches or wear on the surface of the steel strands, but even cause wire breakage in severe cases. Once the steel strands are damaged, not only will their tensile strength be greatly reduced, affecting the efficiency of threading, but it will also pose a potential threat to the sealing performance and structural strength of the LNG storage tank, thereby increasing the risk of leakage or structural failure of the tank.

[0004] In short, the process of prestressed steel strand threading is a key link in the construction of LNG storage tanks, and the degree of attention paid to it is directly related to the quality and safety of the entire project. Therefore, taking effective prevention and control measures is of great significance to ensure the safe and stable operation of LNG storage tanks. Summary of the invention

[0005] The invention provides an oil blowing device for prestressed steel strands of an LNG storage tank, so as to overcome the defects of the prior art.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An oil blowing device for prestressed steel strands of LNG storage tanks is used in the process of threading the prestressed steel strands of LNG tank buttress columns, and includes an oil inlet unit and an oil outlet unit; the oil inlet unit includes an oil inlet cylinder, a pressurizing mechanism and an atomizing mechanism; the oil inlet cylinder is sleeved outside the steel strands at the active end of the tensioning, and the inner end is fixed to the prestressed anchor seat; the end of the outer end of the oil inlet cylinder has an air inlet hole, and the upper surface has an oil filling hole, and the oil filling hole is located on the outside of the steel strand; the pressurizing mechanism is arranged in the oil inlet cylinder, located between the air inlet hole and the oil filling hole, and pressurizes the gas entering from the air inlet hole; the atomizing mechanism is arranged in the oil inlet cylinder, located between the air inlet hole and the oil filling hole, and pressurizes the gas entering from the air inlet hole; the atomizing mechanism is arranged in the oil inlet cylinder, located between the air inlet hole and the oil filling hole, and pressurizes the gas entering from the air inlet hole. The grease blown by the pressurized gas is dispersed in an atomized state on the inner side of the oil filling hole; the oil outlet unit includes an oil outlet cylinder and an oil-gas separation mechanism; the oil outlet cylinder is sleeved outside the steel strand at the passive end of the tensioning, the inner end is fixed to the prestressed anchor seat, and the end of the outer end is provided with an oil-gas discharge port; the oil-gas separation mechanism is arranged outside the oil-gas discharge port to separate the discharged oil-gas mixture; the gas introduced into the air inlet is pressurized by the pressurizing mechanism, and the grease injected into the oil filling hole is blown to the atomizing mechanism, and after the grease is atomized by the atomizing mechanism, it is blown from one end of the steel strand to the other end under the action of the pressurized gas, and finally discharged from the oil-gas discharge port.

[0008] To optimize the above technical solutions, the specific measures taken also include:

[0009] Furthermore, the pressurizing mechanism includes a primary pressurizing component and a secondary pressurizing component; the primary pressurizing component is fixed on the inner side of the air inlet hole and connected thereto, and is provided with a diffusion chamber with a gradually increasing inner diameter and a primary pressurizing chamber with a gradually decreasing inner diameter in sequence from the outside to the inside; the secondary pressurizing component is fixed on the inner side of the primary pressurizing chamber, and has a secondary pressurizing channel connected to the primary pressurizing chamber and arranged in a horizontal direction, and the inner diameter of the secondary pressurizing channel is smaller than the inner diameter of the outlet of the primary pressurizing chamber.

[0010] Furthermore, in the secondary pressurizing component, a plurality of inclined holes are provided on two side walls opposite to each other at the inner end of the secondary pressurizing channel, and the inclined holes on the two side walls are arranged in a staggered manner.

[0011] Furthermore, in the primary pressurizing component, the side wall of the diffusion chamber is in an oblique line shape, and the inner wall of the primary pressurizing chamber is in an arc shape.

[0012] Furthermore, the atomization mechanism is an atomization cone, which is composed of two oppositely arranged and connected conical cavities, and the grease blown by the pressurized gas is atomized when flowing through the connecting part of the two conical cavities.

[0013] Furthermore, the air inlet, the inlet and outlet of the primary pressurizing component, the secondary pressurizing channel and the connecting point of the atomizing cone are all on a horizontal straight line.

[0014] Furthermore, the oil-gas separation mechanism includes a shell; an inlet is provided on the upper part of the side of the shell, which is connected to the oil-gas discharge port; an overflow plate arranged in a horizontal direction is fixed in the shell, and the end of the overflow plate close to the inlet is fixed to the inner wall of the shell, and an oil leakage gap is left between the end away from the inlet and the inner wall of the shell; a baffle plate arranged in a vertical direction is provided above the overflow plate, the upper end of the baffle plate is fixed to the inner wall of the shell, and an exhaust gap is left between the lower end and the overflow plate; above the overflow plate, the side of the baffle plate facing the inlet is the oil-gas separation area, and the side away from the inlet is the exhaust area; below the overflow plate is the oil collecting area; the top of the exhaust area is provided with an exhaust hole; the bottom of the oil collecting area is provided with an oil discharge port.

[0015] Furthermore, in the oil-gas separation mechanism, a conical plate is provided at the entrance of the oil-gas separation zone; and the exhaust hole is in an inverted cone shape.

[0016] Furthermore, the oil inlet unit and the oil outlet unit are both provided with a leveling mechanism; the leveling mechanism includes a stabilizing adjusting rod and a spirit bubble; the spirit bubble is fixed above the oil inlet cylinder and the oil outlet cylinder; the stabilizing adjusting rod is arranged below the oil inlet cylinder and the oil outlet cylinder, and includes a fixed rod, a telescopic rod and a slide rail; the fixed rod is fixed to the side of the buttress column, the slide rail is fixed below the oil inlet cylinder and the oil outlet cylinder, the fixed end of the telescopic rod is fixed on the fixed rod, and the telescopic end is slidably connected to the slide rail, and the oil inlet cylinder and the oil outlet cylinder are centered and leveled by adjusting the length of the telescopic rod.

[0017] Furthermore, the oil inlet cylinder and the oil outlet cylinder are both composed of a cylinder body and a pressure plate; the pressure plate is fixed to the outside of the prestressed anchor seat; the end of the cylinder body is fixed to the outside of the pressure plate; an annular sealing groove is provided on the side of the pressure plate facing the prestressed anchor seat, and a sealing ring is provided in the sealing groove; ball valves are provided at the air inlet and the oil and gas discharge port.

[0018] The beneficial effects of the present invention are as follows: the present invention provides an oil blowing device for prestressed steel strands of LNG storage tanks, which is mainly used to evenly blow oil on the surface of the prestressed steel strands during the process of threading the strands, so as to improve the lubricity and corrosion resistance of the steel strands, ensure the smooth threading process and the long-term safety of the storage tank. Specifically, the device is provided with a pressurizing mechanism and an atomizing mechanism at the oil inlet end, and the pressurizing mechanism can perform secondary pressurization on the gas, and at the same time can drive the gas to rotate to form a turbulent flow; the atomizing mechanism can fully atomize the injected grease under the action of the pressurized gas; under the action of the pressurized gas and the rotating turbulent flow, the atomized grease can be evenly coated on the surface of the steel strands, ensuring that the surface of the steel strands is evenly blown with oil, thereby improving the oil blowing effect. At the same time, the centering and leveling of the oil inlet and outlet cylinders can be achieved through the leveling mechanism, further ensuring the oil blowing effect. In addition, the device of the present invention has a simple structure and is easy to operate. The operator only needs to perform simple operations to complete the oil blowing process, thereby improving work efficiency. The ball valve is used to control the flow of the oil blowing medium, thereby achieving precise control of the oil blowing process, avoiding waste of the oil blowing medium, and improving energy efficiency. The design of the plastic sealing ring effectively prevents leakage of the oil blowing medium, thereby ensuring the safety of the oil blowing process. The present invention achieves uniformity, continuity, and efficiency in oil blowing of steel strands, providing strong technical support for the construction of LNG storage tanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the oil inlet unit of the prestressed steel strand oil blowing device of the LNG storage tank;

[0020] Figure 2 It is a structural schematic diagram of the oil outlet unit of the prestressed steel strand oil blowing device of the LNG storage tank;

[0021] Figure 3 It is a structural schematic diagram of the pressurizing mechanism;

[0022] Figure 4 It is a schematic diagram of the structure of the secondary pressurizing component;

[0023] Figure 5 It is a structural diagram of the atomization mechanism;

[0024] Figure 6 It is a structural schematic diagram of the pressure plate. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention is described below with reference to the accompanying drawings.

[0026] like Figure 1 and 2 As shown, the present invention provides an oil blowing device for prestressed steel strands of LNG storage tanks, which is used in the bundle threading process of prestressed steel strands of LNG tank body buttress columns, and includes an oil inlet unit and an oil outlet unit.

[0027] The oil inlet unit includes an oil inlet cylinder 11, a pressurizing mechanism 12 and an atomizing mechanism 13. The oil inlet cylinder 11 is sleeved on the outside of the steel strand at the active end of the tensioning, and the inner end is fixed to the prestressed anchor seat A. The end of the outer end of the oil inlet cylinder 11 has an air inlet hole 14 for passing gas, and the upper surface has an oil injection hole 15 for injecting grease, and the oil injection hole 15 is located on the outside of the steel strand. The pressurizing mechanism 12 is arranged in the oil inlet cylinder 11, located between the air inlet hole 14 and the oil injection hole 15, and pressurizes the gas entering from the air inlet hole 14. The atomizing mechanism 13 is arranged in the oil inlet cylinder 11, located on the inner side of the oil injection hole 15, and breaks up the grease blown by the pressurized gas into an atomized state.

[0028] The oil outlet unit includes an oil outlet cylinder 21 and an oil-gas separation mechanism 22. The oil outlet cylinder 21 is sleeved outside the steel strand at the passive end of the tensioning, the inner end is fixed to the prestressed anchor seat A, and the end of the outer end has an oil-gas discharge port 23. The oil-gas separation mechanism 22 is arranged outside the oil-gas discharge port 23 to separate the discharged oil-gas mixture.

[0029] The gas introduced into the air inlet 14 is pressurized by the pressurizing mechanism 12, and the grease injected into the oil filling hole 15 is blown to the atomizing mechanism 13. After the grease is atomized by the atomizing mechanism 13, it is blown from one end of the steel strand to the other end under the action of the pressurized gas, and finally discharged from the oil and gas discharge port 23. In this process, the surface of the steel strand is evenly coated with grease.

[0030] Regarding the pressurizing mechanism 12, Figure 3 As shown, in a specific embodiment, the pressurizing mechanism 12 includes a primary pressurizing component and a secondary pressurizing component. The primary pressurizing component is fixed to the inner side of the air inlet 14 and communicated therewith, and is provided with a diffusion chamber 121 with a gradually increasing inner diameter and a primary pressurizing chamber 122 with a gradually decreasing inner diameter from the outside to the inside. The secondary pressurizing component is fixed to the inner side of the primary pressurizing chamber 122, and has a secondary pressurizing channel 123 connected to the primary pressurizing chamber 122 and arranged in the horizontal direction, and the inner diameter of the secondary pressurizing channel 123 is smaller than the inner diameter of the outlet of the primary pressurizing chamber 122. The gas is pressurized once when passing through the primary pressurizing component, and is pressurized twice when passing through the secondary pressurizing channel 123 due to the reduction of the aperture and the unchanged pressure.

[0031] Preferably, if Figure 4 As shown, in the secondary pressurizing component, a plurality of inclined holes 124 are provided on the two opposite side walls at the inner ends of the secondary pressurizing channel 123, and the inclined holes 124 on the two side walls are staggered so that the gas flowing out of the inclined holes 124 forms a turbulent flow, driving the gas to rotate, so that the grease can rotate at high speed with the gas and more effectively infiltrate various areas of the steel strand.

[0032] Preferably, in the primary pressurizing component, the side wall of the diffusion chamber 121 is in an oblique line shape, and the inner wall of the primary pressurizing chamber 122 is in an arc shape, that is, after the gas is initially diffused through the diffusion chamber 121 , it is quickly pressurized by the primary pressurizing chamber 122 .

[0033] Regarding the atomizing mechanism 13, Figure 5 As shown, in a specific embodiment, the atomization mechanism 13 is an atomization cone, which is composed of two oppositely arranged and connected conical cavities, and the grease blown by the pressurized gas is atomized when flowing through the connecting part of the two conical cavities.

[0034] Preferably, the air inlet 14, the inlet and outlet of the primary pressurizing component, the secondary pressurizing channel 123 and the connecting point of the atomizing cone are all on a horizontal straight line, so as to better realize the pressurization of the gas and the atomization of the grease, thereby improving the wetting effect of the steel strand.

[0035] Regarding the oil-gas separation mechanism 22, Figure 2 As shown, in a specific embodiment, the oil-gas separation mechanism 22 includes a housing 221. An inlet is provided at the upper part of the side of the housing 221, which is connected to the oil-gas discharge port 23. An overflow plate 222 arranged in a horizontal direction is fixed in the housing 221, and an end of the overflow plate 222 close to the inlet is fixed to the inner wall of the housing 221, and an oil leakage gap is left between the end away from the inlet and the inner wall of the housing 221. A baffle 223 arranged in a vertical direction is provided above the overflow plate 222, and the upper end of the baffle 223 is fixed to the inner wall of the housing 221, and an exhaust gap is left between the lower end and the overflow plate 222. Above the overflow plate 222, the side of the baffle 223 facing the inlet is the oil-gas separation area, and the side away from the inlet is the exhaust area. Below the overflow plate 222 is the oil collection area. The top of the exhaust area is provided with an exhaust hole 224. The bottom of the oil collection area is provided with an oil discharge port 225. The oil-gas mixture enters the oil-gas separation area from the inlet, and the grease drips down to the overflow plate 222 under the influence of gravity at the baffle 223, and then flows into the oil collection area from the oil leakage gap. After a certain amount of oil is collected, the oil discharge port 225 can be opened for recovery. The remaining gas flows into the exhaust area from the exhaust gap and is finally discharged from the exhaust hole 224.

[0036] Preferably, a conical plate 226 with an inner diameter gradually increasing away from the inlet is provided at the inlet of the oil-gas separation zone. The conical plate 226 can reduce the pressure of the oil-gas mixture and its flow rate, thereby better achieving oil-gas separation.

[0037] Preferably, the exhaust hole 224 is in an inverted cone shape, so as to slow down the exhaust velocity of the gas. At the same time, due to the deceleration of the gas, when the residual grease therein drips under the influence of gravity, the inverted cone-shaped exhaust hole 224 can collect it and guide it to the overflow plate 222, thereby improving the oil-gas separation effect.

[0038] like Figure 1As shown, in a preferred embodiment, both the oil inlet unit and the oil outlet unit are provided with a leveling mechanism. The leveling mechanism includes a stabilizing adjustment rod 31 and a leveling bubble 32. The leveling bubble 32 is fixed above the oil inlet cylinder 11 (oil outlet cylinder). The stabilizing adjustment rod 31 is arranged below the oil inlet cylinder 11 (oil outlet cylinder), and includes a fixed rod 311, a telescopic rod 312 and a slide rail 313. The fixed rod 311 is fixed to the side of the buttress column, and the slide rail 313 is fixed below the oil inlet cylinder 11 (oil outlet cylinder). The fixed end of the telescopic rod 312 is fixed to the fixed rod 311, and the telescopic end is slidably connected to the slide rail 313. By adjusting the length of the telescopic rod 312, the oil inlet cylinder 11 (oil outlet cylinder) is centered and leveled, thereby ensuring the oil blowing effect.

[0039] like Figure 6 As shown, in a specific embodiment, the oil inlet cylinder 11 and the oil outlet cylinder 21 are both composed of a cylinder body 111 and a pressure plate 112. The pressure plate 112 is fixed to the outside of the prestressed anchor seat A. The end of the cylinder body 111 is fixed to the outside of the pressure plate 112. The pressure plate 112 is provided with an annular sealing groove on the side facing the prestressed anchor seat A, and a sealing ring 113 is provided in the sealing groove.

[0040] like Figure 1 and 2 As shown, in a preferred embodiment, ball valves 4 are provided at both the air inlet 14 and the oil and gas discharge port 23 .

[0041] The method of using the oil blowing device includes the following steps:

[0042] Step 1: Check whether all parts of the oil blowing device are intact, ensure that there is no damage or missing, and prepare the necessary auxiliary materials such as grease, air source, etc.

[0043] Step 2: Install the oil blowing device outside the prestressed steel strand bundle path, connect the air inlet with the air source to ensure that the air source is stable and reliable. Connect the oil filling hole with the grease storage container to ensure smooth grease supply.

[0044] Step 3. Open the ball valve and check whether there is any leakage in the oil blowing device. If there is any leakage, replace or repair the plastic sealing ring in time; turn on the air source and observe whether the grease can flow out evenly to ensure that the device is working properly.

[0045] Step 4: Put the oil inlet and outlet cylinders outside the steel strands respectively, fix the pressure plate and the prestressed anchor seat, adjust the clamping force of the pressure plate and the prestressed force to ensure that the oil inlet and outlet cylinders will not loosen or shift during the oil blowing process. Use the horizontal mechanism to perform centering and leveling during the fixing process.

[0046] Step 5. Open the supply switch of the grease storage container and start the gas source so that the grease is evenly coated on the prestressed steel strands under the push of the gas. Observe the oil blowing effect and adjust the flow rate and speed of the oil blowing medium as needed.

[0047] Step 6. After the oil blowing operation is completed, turn off the grease storage container supply switch and air source, clean the residual grease on the surface of the oil blowing device, keep the device clean, and regularly check the various components of the oil blowing device to ensure that they are in good working condition.

[0048] Through the above installation and construction steps, the installation and use of the oil blowing device during the prestressed steel strand threading process of the LNG storage tank can be successfully completed, providing efficient and uniform oil blowing treatment for the tank construction.

[0049] In the present invention, unless otherwise specified, the scientific and technical terms used herein have the meanings commonly understood by those skilled in the art.

[0050] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. cited in the invention are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0051] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil blowing device for prestressed steel strands of LNG storage tanks, used for the threading process of prestressed steel strands of LNG tank buttress columns, characterized by: It includes an oil inlet unit and an oil outlet unit; The oil inlet unit includes an oil inlet cylinder, a pressurizing mechanism and an atomizing mechanism; The oil inlet cylinder is sleeved outside the steel strand at the active end of the tensioning, and the inner end is fixed to the prestressed anchor seat; the end of the outer end of the oil inlet cylinder has an air inlet hole, and the upper surface has an oil injection hole, and the oil injection hole is located on the outer side of the steel strand; The pressurizing mechanism is arranged in the oil inlet cylinder, between the air inlet hole and the oil filling hole, and pressurizes the gas entering from the air inlet hole; The atomizing mechanism is arranged in the oil inlet cylinder, located inside the oil filling hole, and breaks up the grease blown by the pressurized gas into an atomized state; The oil outlet unit includes an oil outlet cylinder and an oil-gas separation mechanism; The oil outlet tube is sleeved outside the steel strand at the passive end of the tensioning, the inner end is fixed to the prestressed anchor seat, and the end of the outer end is provided with an oil and gas discharge port; The oil-gas separation mechanism is arranged outside the oil-gas discharge port to separate the discharged oil-gas mixture; The gas introduced into the air inlet is pressurized by the pressurizing mechanism, and the grease injected into the oil filling hole is blown to the atomizing mechanism. After the grease is atomized by the atomizing mechanism, it is blown from one end of the steel strand to the other end under the action of the pressurized gas, and finally discharged from the oil and gas discharge port.

2. The oil blowing device for prestressed steel strands of LNG storage tanks according to claim 1 is characterized in that: The pressurizing mechanism includes a primary pressurizing component and a secondary pressurizing component; The primary pressurizing component is fixed on the inner side of the air inlet and communicated with the air inlet, and is provided with a diffusion chamber with a gradually increasing inner diameter and a primary pressurizing chamber with a gradually decreasing inner diameter in sequence from the outside to the inside; The secondary pressurizing component is fixed to the inner side of the primary pressurizing chamber, and has a secondary pressurizing channel connected to the primary pressurizing chamber and arranged in the horizontal direction. The inner diameter of the secondary pressurizing channel is smaller than the inner diameter of the outlet of the primary pressurizing chamber.

3. The LNG storage tank prestressed steel strand oil blowing device according to claim 2 is characterized in that In the secondary pressurizing component, a plurality of oblique holes are provided on two side walls opposite to each other at the inner end of the secondary pressurizing channel, and the oblique holes on the two side walls are arranged in a staggered manner.

4. The oil blowing device for prestressed steel strands of LNG storage tanks according to claim 2 is characterized in that: In the primary pressurizing component, the side wall of the diffusion chamber is in an oblique line shape, and the inner wall of the primary pressurizing chamber is in an arc line shape.

5. The oil blowing device for prestressed steel strands of LNG storage tanks according to claim 2 is characterized in that: The atomizing mechanism is an atomizing cone, which is composed of two oppositely arranged and connected conical cavities. The grease blown by the pressurized gas is atomized when it flows through the connecting part of the two conical cavities.

6. The oil blowing device for prestressed steel strands of LNG storage tanks according to claim 5 is characterized in that: The air inlet, the inlet and outlet of the primary pressurizing component, the secondary pressurizing channel and the connecting point of the atomizing cone are all on a horizontal straight line.

7. The oil blowing device for prestressed steel strands of LNG storage tanks according to claim 1 is characterized in that: The oil-gas separation mechanism comprises a housing; An inlet is provided at the upper portion of the side of the shell, which is connected to the oil and gas discharge port; An overflow plate arranged in a horizontal direction is fixed in the shell, one end of the overflow plate close to the inlet is fixed to the inner wall of the shell, and an oil leakage gap is left between the end away from the inlet and the inner wall of the shell; A baffle plate is arranged vertically above the overflow plate, the upper end of the baffle plate is fixed to the inner wall of the shell, and an exhaust gap is left between the lower end and the overflow plate; Above the overflow plate, the side of the baffle plate facing the inlet is the oil-gas separation area, and the side away from the inlet is the exhaust area; below the overflow plate is the oil collection area; the top of the exhaust area has an exhaust hole; the bottom of the oil collection area has an oil discharge port.

8. The oil blowing device for prestressed steel strands of LNG storage tanks according to claim 7 is characterized in that: In the oil-gas separation mechanism, a conical plate is provided at the entrance of the oil-gas separation zone; The exhaust hole is inverted cone shape.

9. The oil blowing device for prestressed steel strands of LNG storage tanks according to claim 1 is characterized in that: The oil inlet unit and the oil outlet unit are both provided with a leveling mechanism; The leveling mechanism includes a stabilizing adjustment rod and a level bubble; The level bubble is fixed above the oil inlet cylinder and the oil outlet cylinder; The stabilizing adjustment rod is arranged below the oil inlet cylinder and the oil outlet cylinder, and comprises a fixing rod, a telescopic rod and a slide rail; The fixed rod is fixed to the side of the buttress column, the slide rail is fixed below the oil inlet cylinder and the oil outlet cylinder, the fixed end of the telescopic rod is fixed to the fixed rod, and the telescopic end is slidably connected to the slide rail. By adjusting the length of the telescopic rod, the oil inlet cylinder and the oil outlet cylinder are centered and leveled.

10. The oil blowing device for prestressed steel strands of LNG storage tanks according to claim 1 is characterized in that: The oil inlet cylinder and the oil outlet cylinder are both composed of a cylinder body and a pressing plate; the pressing plate is fixed to the outside of the prestressed anchor seat; the end of the cylinder body is fixed to the outside of the pressing plate; the side of the pressing plate facing the prestressed anchor seat is provided with an annular sealing groove, and a sealing ring is provided in the sealing groove; Ball valves are provided at the air inlet and the oil and gas discharge port.

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