An air removal device for the high-temperature water system of a low-speed engine

Abstract

This application relates to the technical field of internal combustion engines, and discloses a degassing device for a high-temperature water system of a low-speed engine, which mainly consists of a high-temperature water system, a manual air vent valve and an automatic degassing device. The high-temperature water system is located inside the engine and is composed of cooling water pipes of each cylinder. By adding a manual air vent valve and an automatic degassing device to the high-temperature water system in the present invention, and installing the manual air vent valve at the upper part of the cooling water branch pipe of each cylinder, the manual air vent valve is used for static debugging of the high-temperature water system, temporary air release and inspection during the operation of the main engine. The automatic degassing device is installed at the outlet of the main engine cooling water system. The use of the automatic degassing device can make the cooling water move in a spiral manner to increase the rotational centrifugal force of the cooling water, promote the bubbles to gather at the top of the degassing bucket, and be discharged by the automatic air vent valve, so as to remove the bubbles in the high-temperature water system from the root cause, improve the cooling effect of the cylinder liner, and ensure that the low-speed engine is in the best working state.

Description

Technical Field

[0001] This application relates to the technical field of internal combustion engines, and particularly to a degassing device for a high-temperature water system of a low-speed engine. Background Art

[0002] A marine two-stroke low-speed engine is an engine designed and manufactured specifically for large ships. It works by the explosive force of an internal combustion engine to drive a piston, so as to drive the ship to sail. It has the advantages of high efficiency, energy conservation and environmental protection. During the use of a marine engine, the fuel combustion in its combustion chamber generates high temperature, which is conducted to the cylinder liner, and then the high-temperature water system is required to take away these heats. If there is a large amount of air in the cooling water, it will accelerate the corrosion of the cooling water cavity, resulting in a decline in the cooling effect. At the same time, it will also cause uneven cooling of the cylinder liner due to the presence of bubbles, affecting the heat exchange efficiency and causing the local temperature of the cylinder liner to be too high.

[0003] Please refer to Figure 1 , in the existing high-temperature water system, the outlet branch pipes of the high-temperature cooling water of each cylinder are connected to a ventilation main pipe by small pipes with a diameter of φ25, and an automatic air vent valve is installed on the ventilation main pipe. However, this degassing arrangement has disadvantages during use:

[0004] First, due to the certain flow rate of the high-temperature cooling water, the bubbles are mixed in the water, and the degassing efficiency is not high.

[0005] Second, when temporary ventilation or inspection is required, degassing or inspection cannot be carried out manually. Summary of the Invention

[0006] This application provides a degassing device for a high-temperature water system of a low-speed engine, which has the advantages of efficiently removing bubbles in the high-temperature water system, ensuring uniform cooling of the cylinder liner, improving the cooling efficiency, extending the service life of the cylinder liner, and maintaining the stable performance of the engine, so as to solve the problems of poor degassing effect and poor degassing stability of the existing high-temperature water system of marine low-speed engines.

[0007] To achieve the above object, the present application adopts the following technical solutions: An air deaeration device for a high-temperature water system of a low-speed engine, comprising: a high-temperature water system, which is located inside the engine and is composed of cooling water pipes of each cylinder. One end of the high-temperature water system is the engine high-temperature cooling water inlet, and the other end of the high-temperature water system is the engine high-temperature cooling water outlet. Cooling water is introduced through the engine high-temperature cooling water inlet and discharged through the engine high-temperature cooling water outlet to realize the flow of cooling water in the high-temperature water system to cool the engine; a manual air vent valve, which is fixedly installed on the upper part of the cooling water outlet pipe of each cylinder and is used for temporary air release and inspection during system static commissioning and when the main engine is running; an automatic air deaeration device, which is fixedly installed at the engine high-temperature cooling water outlet and is used for automatic air deaeration when the main engine is running. The design pressure of the automatic air deaeration device is 5 bar, and it is composed of a deaeration barrel, a discharge pipe, a shut-off valve, an inspection needle valve, a relief valve, and an automatic air vent valve. The deaeration barrel is used to eliminate air bubbles in the cooling water. The top and bottom of the deaeration barrel are fixedly connected with discharge pipes. On the discharge pipe located at the top of the deaeration barrel, a shut-off valve, an inspection needle valve, and an automatic air vent valve are fixedly connected in sequence from bottom to top. The air in the air bubbles reaches the automatic air vent valve through the normally open shut-off valve and is discharged through the automatic air vent valve. On the discharge pipe located at the bottom of the deaeration barrel, a relief valve is fixedly connected, which is used to control and adjust the pressure of the liquid or gas system to prevent accidents caused by excessive system pressure.

[0008] Further, the deaeration barrel includes: a barrel body, which is cylindrical; a top dish-shaped head and a bottom dish-shaped head, the top dish-shaped head is fixedly connected to the top of the barrel body, and the bottom dish-shaped head is fixedly connected to the bottom of the barrel body. The shapes of the top dish-shaped head and the bottom dish-shaped head are hemispherical or equal-arc-shaped; a fixed support, the middle part of the outer surface of the barrel body is fixedly connected with a fixed support, the number of the fixed supports is four, and they are evenly arranged around the barrel body; a deaeration system, which is fixedly installed inside the barrel body, and the deaeration system is used to realize the rotation of the cooling water in the barrel body to discharge the air in the cooling water.

[0009] Further, the deaeration system includes: a spiral mechanism, the outer wall of the spiral mechanism is fixedly connected with the inner wall of the barrel body and is used to realize the spiral flow of the cooling water; an exhaust mechanism, which is fixedly connected to the inner edge of the spiral mechanism and is used to unobstructedly discharge the air to the top dish-shaped head.

[0010] Further, the spiral mechanism includes: a spiral member which is in the shape of a spiral plate, and the outer edge of the spiral member is fixedly connected to the inner wall of the barrel body; an inner cavity, an inner cavity is formed on the side wall of the inner edge of the spiral member, and a plurality of inner holes are formed on the wall surface of the spiral member below the inner cavity; a water inlet plate and a water outlet plate, the side wall of the water inlet plate is fixedly connected to the topmost side wall of the spiral member, and the water outlet plate is fixedly connected to the lowermost side wall of the spiral member; a water inlet branch pipe and a water outlet branch pipe, one end of the water inlet branch pipe is fixedly sleeved with the water inlet plate, the other end of the water inlet branch pipe passes through the wall surface of the barrel body and is fixedly communicated with the high-temperature water system, one end of the water outlet branch pipe is fixedly sleeved with the water outlet plate, the other end of the water outlet branch pipe passes through the wall surface of the barrel body and is fixedly communicated with the high-temperature water system, the diameters of the water inlet branch pipe and the water outlet branch pipe are the same, and the diameter of the barrel body is 3 times the diameter of the water inlet branch pipe, and the height of the barrel body is 5 times the diameter of the water inlet branch pipe. The water inlet branch pipe and the water outlet branch pipe are respectively located on both sides of the barrel body, the water inlet branch pipe is located at the upper part of the barrel body, the water outlet branch pipe is located at the lower part of the barrel body, and both the water inlet branch pipe and the water outlet branch pipe are close to the edge of the barrel body and are tangent to the barrel body.

[0011] Further, the exhaust mechanism includes: an exhaust pipe, the outer wall of the exhaust pipe is fixedly connected to the inner edge of the spiral member, and the height of the exhaust pipe is the same as the height of the barrel body; a gas permeable membrane, spiral holes are formed on the wall surface of the exhaust pipe corresponding to the inner cavity, and a gas permeable membrane is fixedly connected to the inner wall of the spiral holes. The gas permeable membrane is a semi-permeable membrane material that allows gas to pass through but not liquid.

[0012] Further, the spiral mechanism further includes: an outer limiting mechanism, the outer edge of the top end of the spiral member is fixedly connected with an outer limiting mechanism, and the outer side wall of the outer limiting mechanism is fixedly connected with the inner wall of the barrel body. The outer limiting mechanism is spirally arranged, and the spiral length is the same as that of the spiral member. The outer limiting mechanism is composed of a plurality of outer limiting blocks. The outer limiting blocks are arc-shaped, and the inner wall radian of the outer limiting blocks is larger than the outer wall radian.

[0013] Further, the spiral mechanism further includes: an inner limiting mechanism, the inner edge of the top end of the spiral member is fixedly connected with an inner limiting mechanism, and the inner side wall of the inner limiting mechanism is fixedly connected with the outer wall of the exhaust pipe. The inner limiting mechanism is spirally arranged. The inner limiting mechanism is composed of a plurality of inner limiting blocks, and each inner limiting block is composed of an arc block and a column block. The outer wall of the arc block is fixedly connected with the column block, and the column block is located at the low end of the arc block. The center of the column block is concentric with the center of the inner wall of the outer limiting block. The number of the inner limiting blocks is the same as that of the outer limiting blocks, and one outer limiting block corresponds to one inner limiting block in position. The inner limiting block has the function of shielding magnetic fields.

[0014] Further, the spiral mechanism further includes: a gas-breaking mechanism, which is movably arranged on the inner limiting mechanism, and the gas-breaking mechanism is spirally arranged. The gas-breaking mechanism is composed of several groups of gas-breaking parts, and one group of gas-breaking parts corresponds to one inner limiting block. The number of one group of gas-breaking parts is four, and the four gas-breaking parts are vertically arranged at the high end of the arc block of the inner limiting block. The connection point positions between the gas-breaking parts and the two outer limiting blocks correspond to each other.

[0015] Further, the gas-breaking part includes: a gas-breaking cavity, which is jointly opened on the wall surface of the inner limiting block and the wall surface of the exhaust pipe; a gas-breaking needle, which is movably arranged in the gas-breaking cavity. The outer wall of the gas-breaking needle is movably sleeved with the inner ring of the sealing ring, and the outer ring of the sealing ring is fixedly sleeved with the inner wall of the gas-breaking cavity close to the spiral part; a gas-breaking block, the tail end of the gas-breaking needle is fixedly connected to the gas-breaking block, and the cross-sectional size of the gas-breaking block is adapted to the cross-sectional size of the gas-breaking cavity. The gas-breaking block has N-type magnetism, and one side wall surface of the gas-breaking block is connected to the side wall of the sealing ring through a tension spring.

[0016] Further, the inner limiting block further includes: a moving cavity, which is opened inside the inner limiting block between the two vertically arranged gas-breaking parts, and the upper and lower parts of one end of the moving cavity partially overlap with the gas-breaking cavities above and below the moving cavity; a moving block, which is movably sleeved inside the moving cavity, and one side of the moving block is fixedly connected to the inner wall of the other end of the moving cavity through a contraction spring. The moving block has S-type magnetism; a fixed film, a column cavity is opened inside the column block, and the inner wall of the column cavity is fixedly connected to the outer surface of the fixed film. The fixed film is filled with a fixed amount of gas, and the fixed film is made of hard rubber material; a fixed pipe, which is fixedly sleeved inside the inner limiting block, and one end of the fixed pipe is fixedly communicated with the fixed film, and the other end of the fixed pipe is fixedly connected to the moving cavity. One fixed film corresponds to three fixed pipes, and one fixed pipe corresponds to one moving cavity.

[0017] The present application has the following beneficial effects:

[0018] An air removal device for the high-temperature water system of a low-speed engine provided by the present application, by adding a manual air vent valve and an automatic air removal device to the high-temperature water system, and installing the manual air vent valve on the upper part of each cylinder cooling water branch pipe, so that the manual air vent valve is used for the static debugging of the high-temperature water system, the temporary air release and inspection during the operation of the main engine. The automatic air removal device is installed at the outlet of the main engine cooling water system. The use of the automatic air removal device can make the cooling water move in a spiral manner to increase the rotational centrifugal force of the cooling water, promote the bubbles to gather at the top of the air removal bucket, and be discharged by the automatic air vent valve, which can remove the bubbles in the high-temperature water system from the root cause, improve the cooling effect of the cylinder liner, and ensure that the low-speed engine is in the best working state.

[0019] By arranging an inner cavity inside the spiral member, opening inner holes on the spiral member wall below the inner cavity, arranging an exhaust pipe at the inner edge of the spiral member, and arranging a gas permeable membrane on the exhaust pipe wall corresponding to the inner cavity, when the cooling water discharges air, the air is discharged into the inner cavity through the inner holes, then the air is discharged into the exhaust pipe by the gas permeable membrane, and finally the air moves to the position of the top dish-shaped head and is discharged by the automatic air vent valve of the automatic degassing device. Thus, the upward movement path of the air is changed, and the air can effectively reduce the possibility of contacting the cooling water above during its movement through a zigzag movement method, thereby improving the degassing efficiency of the cooling water and preventing the discharged air from being redissolved in the cooling water during the upward movement and requiring secondary degassing.

[0020] By arranging an outer limiting mechanism at the outer edge of the top of the spiral member, arranging an inner limiting mechanism at the inner edge of the top of the spiral member, and arranging a gas breaking mechanism on the inner limiting mechanism, when the cooling water flows on the spiral member, restricted by the shapes of the outer limiting mechanism and the inner limiting mechanism, both the flow path of the cooling water is extended and the cooling water is forced to rotate and impact strongly and multi-angularly, thereby effectively increasing the rotational centrifugal force of the cooling water and improving the efficiency and effect of bubble elimination. At the same time, when the cooling water flows between the two outer limiting blocks, the inner and outer limiting mechanisms will provide a thrust force for the cooling water to move towards the gas breaking mechanism, prompting the bubbles in the cooling water to be punctured by the gas breaking parts, realizing the full rupture of the bubbles and the full release and discharge of the gas, further improving the efficiency and effect of bubble elimination.

[0021] By arranging a moving block, a fixed membrane and a fixed pipe inside the inner limiting block, using the high temperature of the cooling water to affect the air pressure inside the fixed membrane, prompting the air pressure to change and controlling the movement of the moving block, realizing the movement of the gas breaking parts. When the cooling water flows in the automatic degassing device, most of the gas breaking parts extend into the spiral member to realize the puncturing of the bubbles. When the cooling water does not flow in the automatic degassing device, most of the gas breaking parts retract into the exhaust pipe, and the air inside the exhaust pipe effectively dries the gas breaking parts. Compared with the gas breaking parts always being located inside the spiral member, the drying effect of storing the gas breaking parts in the exhaust pipe is better and the service life is longer. Brief Description of the Drawings

[0022] The drawings forming a part of the specification depict the embodiments disclosed in the present application and, together with the specification, are used to explain the principles of the present application.

[0023] Referring to the drawings, the present application can be more clearly understood according to the following detailed description, wherein:

[0024] Figure 1 It is a schematic diagram of the air vent arrangement of the high-temperature water system of the current low-speed engine;

[0025] Figure 2 It is a schematic diagram of the air vent arrangement of the high-temperature water system of the low-speed engine in the present invention;

[0026] Figure 3 It is the external three-dimensional structure diagram of the automatic degassing device in the present invention;

[0027] Figure 4 It is the sectional three-dimensional structure diagram of the automatic degassing device in the present invention;

[0028] Figure 5 It is the overall three-dimensional structure diagram of the degassing system in the present invention;

[0029] Figure 6 It is the three-dimensional structure diagram of the degassing system without the inlet branch pipe and the outlet branch pipe in the present invention;

[0030] Figure 7 In the present invention Figure 6 It is the overall top view structure diagram of the components;

[0031] Figure 8 It is the three-dimensional structure diagram of the exhaust mechanism and the air-breaking mechanism in the present invention;

[0032] Figure 9 It is the three-dimensional structure diagram of the inner limiting mechanism in the present invention;

[0033] Figure 10 It is the three-dimensional structure diagram of the outer limiting mechanism in the present invention;

[0034] Figure 11 It is the three-dimensional structure diagram of the spiral part in the present invention;

[0035] Figure 12 It is the three-dimensional structure diagram of the exhaust pipe, an outer limiting block, an inner limiting block and a group of air-breaking parts in the present invention;

[0036] Figure 13 It is the top view internal structure diagram of the inner limiting block at the air-breaking part in the present invention;

[0037] Figure 14 It is the top view internal structure diagram of the inner limiting block at the moving block in the present invention;

[0038] Figure 15 It is the side view internal structure diagram of the local inner limiting block in the present invention.

[0039] In the figure: 1. High-temperature water system; 11. Inlet of engine high-temperature cooling water; 12. Outlet of engine high-temperature cooling water; 13. Automatic breather valve; 2. Manual breather valve; 3. Automatic degassing device; 31. Barrel body; 32. Top dished head; 33. Bottom dished head; 34. Fixed bracket; 4. Vent pipe; 41. Closing stop valve; 42. Inspection needle valve; 43. Drain valve; 5. Spiral part; 50. Inner cavity; 501. Inner hole; 51. Inlet branch pipe; 511. Inlet plate; 52. Outlet branch pipe; 521. Outlet plate; 6. Exhaust pipe; 61. Gas permeable membrane; 7. Outer limit block; 8. Inner limit block; 80. Moving cavity; 81. Moving block; 82. Fixed membrane; 83. Fixed pipe; 9. Gas-breaking part; 90. Gas-breaking cavity; 91. Gas-breaking needle; 92. Gas-breaking block. Detailed implementation mode

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0041] Embodiment 1

[0042] Please refer to Figures 1 - 3 , a degassing device for a high-temperature water system of a low-speed engine, comprising:

[0043] The high-temperature water system 1 is located in the engine and is composed of the cooling water pipes of each cylinder. One end of the high-temperature water system 1 is the inlet of the engine high-temperature cooling water 11, and the other end of the high-temperature water system 1 is the outlet of the engine high-temperature cooling water 12. Cooling water is introduced through the inlet of the engine high-temperature cooling water 11 and discharged through the outlet of the engine high-temperature cooling water 12 to realize the flow of the cooling water in the high-temperature water system 1 to cool the engine.

[0044] The manual breather valve 2 is fixedly installed on the upper part of the cooling water outlet pipe of each cylinder and is used for the static commissioning of the system, the temporary gas release and inspection during the operation of the main engine.

[0045] The automatic degassing device 3 is fixedly installed at the outlet 12 of the high-temperature cooling water of the engine and is used for automatic degassing during the operation of the main engine. The design pressure of the automatic degassing device 3 is 5 bar, and it consists of a degassing barrel, a discharge pipe 4, a shut-off valve 41, an inspection needle valve 42, a relief valve 43, and an automatic breather valve 13. The top and bottom of the degassing barrel are fixedly connected to the discharge pipe 4. On the discharge pipe 4 located at the top of the degassing barrel, the shut-off valve 41, the inspection needle valve 42, and the automatic breather valve 13 are fixedly connected in sequence from bottom to top. That is, the automatic breather valve 13 is installed at the uppermost part of the degassing barrel, and the automatic breather valve 13 is connected to the shut-off valve 41 through the discharge pipe 4. The inspection needle valve 42 is located above the shut-off valve 41 and below the automatic breather valve 13. The air in the bubbles is discharged through the normally open shut-off valve 41 to the automatic breather valve 13 and then through the automatic breather valve 13. On the discharge pipe 4 located at the bottom of the degassing barrel, the relief valve 43 is fixedly connected. That is, the relief valve 43 is installed at the lowermost part of the degassing barrel and is used to control and regulate the pressure of the liquid or gas system to prevent accidents caused by excessive system pressure.

[0046] Please refer to Figures 3 - 4 , the degassing barrel for removing bubbles in the cooling water includes:

[0047] The barrel body 31 is cylindrical and is used to introduce cooling water to remove the bubbles in the cooling water.

[0048] The top dish-shaped head 32 and the bottom dish-shaped head 33. The top dish-shaped head 32 is fixedly connected to the top of the barrel body 31, and the bottom dish-shaped head 33 is fixedly connected to the bottom of the barrel body 31. The shapes of the top dish-shaped head 32 and the bottom dish-shaped head 33 are hemispherical or equal-arc-shaped. There are holes on the heads of the top dish-shaped head 32 and the bottom dish-shaped head 33, and the discharge pipe 4 is welded for connecting components such as the automatic breather valve 13.

[0049] The fixed brackets 34 are fixedly connected to the middle of the outer surface of the barrel body 31. The number of the fixed brackets 34 is four and they are evenly arranged around the barrel body 31. The degassing barrel can be stably installed at the outlet 12 of the high-temperature cooling water of the engine by using the fixed brackets 34.

[0050] The degassing system is fixedly installed inside the barrel body 31. The degassing system is used to make the cooling water rotate inside the barrel body 31 to achieve the exhaust of the cooling water.

[0051] Embodiment 2

[0052] On the basis of Embodiment 1, please refer to Figures 4 - 7 , Figure 11 , the degassing system includes:

[0053] The spiral mechanism, the outer wall of the spiral mechanism is fixedly connected to the inner wall of the barrel body 31, and is used to realize the spiral flow of the cooling water. The spiral mechanism includes:

[0054] The spiral member 5, the spiral member 5 is in the shape of a spiral plate, and the outer edge of the spiral member 5 is fixedly connected to the inner wall of the barrel body 31. After the cooling water enters the spiral member 5, it can spiral down along the spiral member 5 due to its own gravity, that is, the cooling water generates a rotational motion within the spiral member 5, thereby forming a centripetal force field, which is convenient for removing the bubbles in the cooling water, achieving the purpose of discharging air and eliminating bubbles.

[0055] The inner cavity 50, the inner edge side wall of the spiral member 5 is provided with the inner cavity 50, and a plurality of inner holes 501 are provided on the wall surface of the spiral member 5 below the inner cavity 50. The air discharged from the cooling water can be discharged into the inner cavity 50 through the inner holes 501, preparing for the subsequent discharge of the air in the inner cavity 50 by the exhaust mechanism, effectively changing the moving path of the air, and preventing the air from vertically rising and contacting the cooling water again and dissolving in the water.

[0056] The water inlet plate 511 and the water outlet plate 521, the side wall of the water inlet plate 511 is fixedly connected to the topmost side wall of the spiral member 5, and the water outlet plate 521 is fixedly connected to the lowermost side wall of the spiral member 5. The water inlet plate 511 and the water outlet plate 521 can completely block the spiral member 5, ensuring that the cooling water is sealed within the spiral mechanism and can only spiral along the spiral member 5, ensuring the correctness of the flow path of the cooling water, and thus ensuring the sufficiency of bubble removal.

[0057] The water inlet branch pipe 51 and the water outlet branch pipe 52, one end of the water inlet branch pipe 51 is fixedly sleeved with the water inlet plate 511, the other end of the water inlet branch pipe 51 passes through the wall surface of the barrel body 31 and is fixedly communicated with the high-temperature water system 1, one end of the water outlet branch pipe 52 is fixedly sleeved with the water outlet plate 521, the other end of the water outlet branch pipe 52 passes through the wall surface of the barrel body 31 and is fixedly communicated with the high-temperature water system 1. The diameters of the water inlet branch pipe 51 and the water outlet branch pipe 52 are the same, and the diameter of the barrel body 31 is 3 times the diameter of the water inlet branch pipe 51, and the height of the barrel body 31 is 5 times the diameter of the water inlet branch pipe 51. The flange surfaces of the water inlet branch pipe 51 and the water outlet branch pipe 52 are parallel. The water inlet branch pipe 51 and the water outlet branch pipe 52 are respectively located on both sides of the barrel body 31, and the water inlet branch pipe 51 is located in the upper part of the barrel body 31 and the water outlet branch pipe 52 is located in the lower part of the barrel body 31. The water inlet branch pipe 51 and the water outlet branch pipe 52 are both close to the edge of the barrel body 31 and are tangent to the barrel body 31. It can use the water inlet branch pipe 51 to make the cooling water enter the spiral member 5 along the inner wall edge of the barrel body 31, then spiral down within the spiral member 5, and finally discharge the spiral member 5 by using the water outlet branch pipe 52, effectively improving the effect of the spiral rotation of the cooling water in the degassing barrel, promoting the bubbles in the cooling water to converge at the top dish-shaped head 32, facilitating the full degassing by the automatic degassing device 3.

[0058] Please refer to Figures 4 - 8 , the degassing system further includes:

[0059] An exhaust mechanism, which is fixedly connected to the inner edge of the spiral mechanism and is used to unobstructedly discharge air to the top dish-shaped head 32. The exhaust mechanism includes:

[0060] An exhaust pipe 6, the outer wall of the exhaust pipe 6 is fixedly connected to the inner edge of the spiral member 5, and the height of the exhaust pipe 6 is the same as the height of the barrel body 31, which is convenient for discharging the air discharged from the spiral member 5 to the position of the top dish-shaped head 32 through the exhaust pipe 6, realizing the accurate movement of the air and avoiding the repeated contact of the air with the cooling water, which affects the degassing effect.

[0061] A gas permeable membrane 61. A spiral hole is provided on the wall surface of the exhaust pipe 6 corresponding to the inner cavity 50, and a gas permeable membrane 61 is fixedly connected to the inner wall of the spiral hole. The gas permeable membrane 61 is a semi-permeable membrane material that allows gas molecules to pass through but blocks liquid molecules. Commonly used gas permeable membrane materials include polytetrafluoroethylene (PTFE), polyurethane (PU), polyethylene (PE), polypropylene (PP), etc. These materials have good gas permeability, as well as good physical properties and chemical resistance, and can realize the discharge of the air in the inner cavity 50 into the exhaust pipe 6 through the gas permeable membrane 61, facilitating the air to be discharged from the automatic degassing device 3 and realizing sufficient degassing.

[0062] Embodiment 3

[0063] On the basis of Embodiment 2, please refer to Figures 4 - 10 、 Figure 12 , the spiral mechanism further includes:

[0064] An outer limiting mechanism, an outer limiting mechanism is fixedly connected to the outer edge of the top end of the spiral member 5, and the outer side wall of the outer limiting mechanism is fixedly connected to the inner wall of the barrel body 31. The outer limiting mechanism is spirally arranged, and the spiral length is the same as that of the spiral member 5. When the cooling water flows along the spiral member 5, the outer limiting mechanism can increase the rotation angle of the cooling water and increase the strong rotation frequency, further increasing the rotational centrifugal force of the cooling water. The outer limiting mechanism is composed of several outer limiting blocks 7. The outer limiting blocks 7 are arc-shaped, and the inner wall radian of the outer limiting blocks 7 is larger than the outer wall radian. When the cooling water flows from one outer limiting block 7 to another outer limiting block 7, the cooling water is restricted by the shape of the outer limiting block 7 and first moves towards the inner edge direction of the spiral member 5 and then towards the outer edge direction of the spiral member 5, effectively increasing the path of the cooling water during flow and increasing the degree of rotation during flow, thereby further improving the degree of spiral rotation of the cooling water on the spiral member 5.

[0065] Inner limiting mechanism: An inner limiting mechanism is fixedly connected to the inner edge of the top end of the spiral member 5, and the inner side wall of the inner limiting mechanism is fixedly connected to the outer wall of the exhaust pipe 6. The inner limiting mechanism is spirally arranged. When the cooling water flows along the spiral member 5, the inner limiting mechanism can increase the rotation angle of the cooling water and increase the strong rotation frequency, further increasing the rotational centrifugal force of the cooling water. The inner limiting mechanism is composed of several inner limiting blocks 8, and each inner limiting block 8 is composed of an arc block and a column block. The outer wall of the arc block is fixedly connected to the column block, and the column block is located at the lower end of the arc block. When the cooling water flows from the high end to the low end of the arc block, the cooling water is restricted by the shape of the inner limiting block 8, causing the fluid to impact the column block and be pushed by the column block to move towards the outer limiting block 7, effectively increasing the path of the cooling water during flow and increasing the degree of rotation during flow, thereby further improving the degree of spiral rotation of the cooling water on the spiral member 5. The center of the column block is concentric with the center of the inner wall of the outer limiting block 7. The number of inner limiting blocks 8 is the same as that of the outer limiting blocks 7, and one outer limiting block 7 corresponds to one inner limiting block 8 in position. The cooling water can be jointly restricted by the outer limiting block 7 and the inner limiting block 8, so that a movement path of first outward, then inward, and then outward is generated on the spiral member 5, effectively increasing the path of the spiral movement of the cooling water and enhancing the spiral flow state of the cooling water, achieving the best defoaming effect. The inner limiting block 8 has the function of shielding the magnetic field. When the moving block 81 moves to a position where it does not directly face the air-breaking block 92, it can reduce the magnetic force received by the entire air-breaking member 9, prompting the air-breaking member 9 to move towards the exhaust pipe 6, and further prompting the air-breaking member 9 to be placed in a dry space, thereby extending the service life of the air-breaking member 9.

[0066] Air-breaking mechanism: The air-breaking mechanism is movably arranged on the inner limiting mechanism and is spirally arranged. The air-breaking mechanism is composed of several groups of air-breaking members 9, and one group of air-breaking members 9 corresponds to one inner limiting block 8. The number of one group of air-breaking members 9 is four, and the four air-breaking members 9 are vertically arranged at the high end of the arc block of the inner limiting block 8, that is, the air-breaking member 9 is located on one side of the column block. The connection point positions between the air-breaking member 9 and the two outer limiting blocks 7 correspond. When the cooling water is affected by the outer limiting block 7 and the inner limiting block 8 and moves towards the inner edge of the spiral member 5, the cooling water can move sufficiently and directly collide with the air-breaking member 9, thereby using the air-breaking member 9 to pierce the bubbles in the cooling water and further promoting the discharge of the air in the bubbles.

[0067] Embodiment Four

[0068] On the basis of Embodiment Three, please refer to Figures 12 - 15 , the air-breaking member 9 includes:

[0069] Air-breaking cavity 90: The wall surface of the inner limiting block 8 and the wall surface of the exhaust pipe 6 jointly define an air-breaking cavity 90 for the reciprocating movement of the air-breaking needle 91 and the air-breaking block 92 to realize different functions of different states of the air-breaking member 9.

[0070] The air-breaking needle 91 is movably arranged within the air-breaking cavity 90. The outer wall of the air-breaking needle 91 is movably sleeved with the inner ring of the sealing ring, and the outer ring of the sealing ring is fixedly sleeved with the inner wall of the air-breaking cavity 90 close to the spiral member 5. When the air-breaking needle 91 moves within the air-breaking cavity 90, the sealing ring can ensure that the cooling water in the spiral member 5 does not enter the air-breaking cavity 90, thereby improving the dryness of the space within the exhaust pipe 6.

[0071] The air-breaking block 92, the tail end of the air-breaking needle 91 is fixedly connected to the air-breaking block 92, and the cross-sectional dimension of the air-breaking block 92 is adapted to the cross-sectional dimension of the air-breaking cavity 90, ensuring that the air-breaking block 92 can be retracted as much as possible within the air-breaking cavity 90 in a certain state, that is, the air-breaking needle 91 is extended into the spiral member 5 as much as possible to fully puncture the bubbles. The air-breaking block 92 has N-type magnetism, and one side wall surface of the air-breaking block 92 is connected to the side wall of the sealing ring through a tension spring. When the air-breaking member 9 is not affected by magnetic force, the air-breaking member 9 is in a state of being mostly retracted into the exhaust pipe 6 under the thrust of the tension spring, reducing the volume of the air-breaking member 9 placed within the spiral member 5 and preventing the air-breaking member 9 from being in a humid state for a long time and reducing its lifespan. When the air-breaking member 9 is affected by magnetic force, the air-breaking member 9 overcomes the thrust of the tension spring and is in a state of being mostly extended into the spiral member 5, facilitating the air-breaking member 9 to puncture the bubbles.

[0072] Please refer to Figures 12 - 15 , the inner limit block 8 further includes:

[0073] The moving cavity 80, a moving cavity 80 is formed inside the inner limit block 8 between two vertically arranged air-breaking members 9, and the upper and lower parts of one end of the moving cavity 80 partially overlap with the air-breaking cavities 90 located above and below this moving cavity 80. When the moving block 81 moves to the overlapping part, the front surface of the moving block 81 faces the air-breaking block 92, causing the air-breaking block 92 to be attracted by the magnetic force and approach the moving block 81, thereby driving most of the air-breaking members 9 into the spiral member 5.

[0074] The moving block 81, a moving block 81 with S-type magnetism is movably sleeved inside the moving cavity 80, and one side of the moving block 81 is fixedly connected to the inner wall of the other end of the moving cavity 80 through a compression spring. When high-temperature cooling water is not introduced into the automatic air-removing device 3, the moving block 81 is in a position close to the column block under the pulling force of the compression spring, facilitating most of the air-breaking members 9 to retract into the exhaust pipe 6. When high-temperature cooling water is introduced into the automatic air-removing device 3, the moving block 81 is affected by the increased air pressure and overcomes the pulling force of the compression spring to be in a position overlapping with the air-breaking cavity 90, facilitating most of the air-breaking members 9 to extend into the spiral member 5.

[0075] The fixed film 82 is provided with a column cavity inside the column block, and the inner wall of the column cavity is fixedly connected to the outer surface of the fixed film 82. The fixed film 82 is filled with a certain amount of gas. When high-temperature cooling water is introduced into the automatic degassing device 3, the fixed film 82 is affected by the temperature rise, causing the air pressure inside it to increase. As a result, the moving block 81 is pushed to move towards the air-breaking member 9 against the action of the contraction spring. The fixed film 82 is made of hard rubber material and will not deform due to air pressure changes.

[0076] The fixed pipe 83 is fixedly sleeved inside the inner limit block 8, and one end of the fixed pipe 83 is fixedly communicated with the fixed film 82. The other end of the fixed pipe 83 is fixedly connected to the moving cavity 80. One fixed film 82 is correspondingly provided with three fixed pipes 83, and one fixed pipe 83 corresponds to one moving cavity 80. The fixed pipe 83 enables the gas to move freely between the moving cavity 80 and the fixed film 82. The air pressure inside the fixed film 82 can affect the moving block 81, causing the moving block 81 to perform different functions at different times.

[0077] The working principle of the usage method of the present invention is as follows:

[0078] During the installation of the marine low-speed engine, install the high-temperature water system degassing device. Please refer to Figure 2 , the high-temperature water system degassing device consists of a manual air vent valve 2 and an automatic degassing device 3. The manual air vent valve 2 is installed on the upper part of each cylinder cooling water branch pipe, and is used for static commissioning of the high-temperature water system, temporary air release and inspection during the operation of the main engine, to cope with the temporary air venting or inspection of the staff. The automatic degassing device 3 is installed at the outlet of the main engine high-temperature cooling water. For details, please refer to Figure 3 , and is used for automatic degassing of the high-temperature cooling water to solve the problem that the existing high-temperature cooling water has poor degassing effect due to the flow rate.

[0079] When the high-temperature cooling water is injected into the automatic degassing device 3 through the water inlet branch pipe 51, the cooling water is discharged into the spiral mechanism, and due to its own gravity and the shape restriction of the spiral member 5, it generates a spiral rotation inside the automatic degassing device 3, causing the bubbles in the water to be discharged under the action of rotational centrifugal force, and passing through the inner hole 501, the inner cavity 50 and the gas permeable membrane 61 and discharged into the exhaust pipe 6. Finally, it converges in the top dish-shaped head 32 through the exhaust pipe 6, and finally moves to the automatic air vent valve 13 through components such as the air release pipe 4, realizing that the air in the bubbles is discharged from the automatic air vent valve 13 out of the automatic degassing device 3. The cooling water after the degassing operation flows out of the automatic degassing device 3 through the water outlet branch pipe 52 and enters the high-temperature water system 1 again, thus completing a high-temperature cooling water degassing on the high-temperature water system 1, which can efficiently remove the bubbles in the high-temperature water system 1, ensure uniform cooling of the cylinder liner, improve the cooling efficiency of the engine, extend the service life of the cylinder liner, and maintain the stable performance of the engine.

[0080] When the high-temperature cooling water flows in the spiral member 5, since the inner limiting mechanism and the outer limiting mechanism are provided at the top end of the spiral member 5, it prompts the high-temperature cooling water to move left and right on the plane of the spiral member 5 reciprocally when flowing downward. This not only prolongs the flow path of the cooling water on the spiral member 5, enabling the cooling water to have sufficient time to discharge bubbles, but also prompts the cooling water to generate strong multi-angle rotational impacts, effectively increasing the rotational centrifugal force of the cooling water, and further improving the efficiency and effect of eliminating bubbles in the automatic degassing device 3.

[0081] Meanwhile, due to the influence of the high temperature of the cooling water, the air pressure in the fixed film 82 increases, effectively pushing the moving block 81 to move towards the air-breaking member 9, and making the moving block 81 face the air-breaking block 92. At this time, the air-breaking block 92 is affected by the magnetic suction force of the moving block 81 and overcomes the thrust of the tension spring, thereby driving the entire air-breaking member 9 to move into the spiral member 5. And the air-breaking member 9 can always be mostly inside the spiral member 5 during the flow of the high-temperature cooling water. When the cooling water flows through the two outer limiting blocks 7, the shape settings of the inner and outer limiting mechanisms will provide a thrust for the cooling water to move towards the air-breaking mechanism, prompting the bubbles in the cooling water to move and be punctured by the air-breaking member 9, realizing the full rupture of the bubbles, and the gas in the bubbles being fully released and discharged, further improving the efficiency and effect of the spiral mechanism in eliminating bubbles.

[0082] When the automatic degassing device 3 stops working and no cooling water is introduced into the automatic degassing device 3, due to the decrease in temperature inside the automatic degassing device 3, the air pressure in the fixed film 82 decreases, driving the moving block 81 to move towards the fixed tube 83 under the pulling force of the telescopic spring, and making the moving block 81 no longer face the air-breaking block 92. At this time, the air-breaking block 92 is not affected by the magnetic suction force of the moving block 81, and drives the entire air-breaking member 9 to move into the exhaust pipe 6 under the thrust of the tension spring. And the air-breaking member 9 can always be mostly inside the exhaust pipe 6. Since the air in the exhaust pipe 6 is drier than that in the spiral member 5, the air moving in the exhaust pipe 6 can dry the air-breaking member 9, avoiding the shortening of the service life of the air-breaking member 9 due to being in a humid environment for a long time. Therefore, this operation can effectively improve the service life of the air-breaking member 9.

Claims

1. An air removal device for a high-temperature water system of a low-speed engine, characterized in that Comprising: A high-temperature water system (1), which is located inside the engine and consists of cooling water pipes of each cylinder. One end of the high-temperature water system (1) is the engine high-temperature cooling water inlet (11), and the other end is the engine high-temperature cooling water outlet (12). Cooling water is introduced through the engine high-temperature cooling water inlet (11) and discharged through the engine high-temperature cooling water outlet (12) to realize the flow of cooling water in the high-temperature water system (1) to cool the engine. A manual air vent valve (2), which is fixedly installed on the upper part of the cooling water outlet pipe of each cylinder and is used for static debugging of the system, temporary air release and inspection during the operation of the main engine. An automatic degassing device (3), which is fixedly installed at the engine high-temperature cooling water outlet (12) and is used for automatic degassing during the operation of the main engine. The design pressure of the automatic degassing device (3) is 5 bar, and it consists of a degassing bucket, a discharge pipe (4), a shut-off valve (41), an inspection needle valve (42), a relief valve (43) and an automatic air vent valve (13). The degassing bucket is used to eliminate air bubbles in the cooling water. The top and bottom of the degassing bucket are fixedly connected with a discharge pipe (4). On the discharge pipe (4) at the top of the degassing bucket, a shut-off valve (41), an inspection needle valve (42) and an automatic air vent valve (13) are fixedly connected in sequence from bottom to top. The air in the air bubbles reaches the automatic air vent valve (13) through the normally open shut-off valve (41) and is discharged through the automatic air vent valve (13). On the discharge pipe (4) at the bottom of the degassing bucket, a relief valve (43) is fixedly connected, which is used to control and regulate the pressure of the liquid or gas system. The degassing bucket includes: A barrel body (31), which is cylindrical. A top dished head (32) and a bottom dished head (33). The top dished head (32) is fixedly connected to the top of the barrel body (31), and the bottom dished head (33) is fixedly connected to the bottom of the barrel body (31). The shapes of the top dished head (32) and the bottom dished head (33) are hemispherical or equal-arc. Fixed brackets (34), the middle part of the outer surface of the barrel body (31) is fixedly connected with fixed brackets (34). The number of the fixed brackets (34) is four, and they are evenly arranged around the barrel body (31). A degassing system, which is fixedly installed inside the barrel body (31). The degassing system is used to realize the rotation of the cooling water in the barrel body (31) to discharge the air in the cooling water. The degassing system includes: A spiral mechanism, the outer wall of the spiral mechanism is fixedly connected with the inner wall of the barrel body (31) and is used to realize the spiral flow of the cooling water. An exhaust mechanism, which is fixedly connected to the inner edge of the spiral mechanism and is used to unobstructedly discharge the air to the inside of the top dished head (32). The spiral mechanism includes: A spiral member (5), which is spiral plate-shaped, and the outer edge of the spiral member (5) is fixedly connected with the inner wall of the barrel body (31). Inner cavity (50), an inner cavity (50) is provided on the inner edge side wall of the spiral member (5), and a plurality of inner holes (501) are provided on the wall surface of the spiral member (5) below the inner cavity (50); Water inlet plate (511) and water outlet plate (521), the side wall of the water inlet plate (511) is fixedly connected to the topmost side wall of the spiral member (5), and the water outlet plate (521) is fixedly connected to the lowermost side wall of the spiral member (5); Water inlet branch pipe (51) and water outlet branch pipe (52), one end of the water inlet branch pipe (51) is fixedly sleeved with the water inlet plate (511), the other end of the water inlet branch pipe (51) passes through the wall surface of the barrel body (31) and is fixedly communicated with the high-temperature water system (1), one end of the water outlet branch pipe (52) is fixedly sleeved with the water outlet plate (521), the other end of the water outlet branch pipe (52) passes through the wall surface of the barrel body (31) and is fixedly communicated with the high-temperature water system (1), the diameters of the water inlet branch pipe (51) and the water outlet branch pipe (52) are the same, and the diameter of the barrel body (31) is 3 times the diameter of the water inlet branch pipe (51), the height of the barrel body (31) is 5 times the diameter of the water inlet branch pipe (51), the water inlet branch pipe (51) and the water outlet branch pipe (52) are respectively located on both sides of the barrel body (31), and the water inlet branch pipe (51) is located in the upper part of the barrel body (31) and the water outlet branch pipe (52) is located in the lower part of the barrel body (31), the water inlet branch pipe (51) and the water outlet branch pipe (52) are both close to the edge of the barrel body (31) and are tangent to the barrel body (31); The exhaust mechanism includes: Exhaust pipe (6), the outer wall of the exhaust pipe (6) is fixedly connected to the inner edge of the spiral member (5), and the height of the exhaust pipe (6) is the same as the height of the barrel body (31); Gas permeable membrane (61), a spiral hole is provided on the wall surface of the exhaust pipe (6) corresponding to the inner cavity (50), and a gas permeable membrane (61) is fixedly connected to the inner wall of the spiral hole, and the gas permeable membrane (61) is a semi-permeable membrane material that allows gas to pass through but not liquid.

2. The degassing device for the high-temperature water system of a low-speed engine according to claim 1, characterized in that, The spiral mechanism further includes: Outer limiting mechanism, the outer edge of the top end of the spiral member (5) is fixedly connected with an outer limiting mechanism, and the outer side wall of the outer limiting mechanism is fixedly connected with the inner wall of the barrel body (31), the outer limiting mechanism is spirally arranged, and the spiral length is the same as that of the spiral member (5), the outer limiting mechanism is composed of a plurality of outer limiting blocks (7), the outer limiting blocks (7) are arc-shaped, and the inner wall radian of the outer limiting blocks (7) is larger than the outer wall radian.

3. The deaeration device for the high-temperature water system of a low-speed engine according to claim 2, characterized in that, The spiral mechanism further includes: Inner limiting mechanism, an inner limiting mechanism is fixedly connected to the inner edge of the top end of the spiral member (5), and the inner side wall of the inner limiting mechanism is fixedly connected to the outer wall of the exhaust pipe (6). The inner limiting mechanism is spirally arranged. The inner limiting mechanism is composed of a plurality of inner limiting blocks (8), and the inner limiting block (8) is composed of an arc block and a column block. The outer wall of the arc block is fixedly connected to the column block, and the column block is located at the lower end of the arc block. The center of the column block is concentric with the center of the inner wall of the outer limiting block (7). The number of the inner limiting blocks (8) is the same as that of the outer limiting blocks (7), and one outer limiting block (7) corresponds to one inner limiting block (8). The inner limiting block (8) has the function of shielding the magnetic field.

4. The degassing device for the high-temperature water system of a low-speed engine according to claim 3, characterized in that, The spiral mechanism further includes: Gas-breaking mechanism, the gas-breaking mechanism is movably arranged on the inner limiting mechanism, and the gas-breaking mechanism is spirally arranged. The gas-breaking mechanism is composed of several groups of gas-breaking members (9), and one group of gas-breaking members (9) corresponds to one inner limiting block (8). The number of one group of the gas-breaking members (9) is four, and the four gas-breaking members (9) are vertically arranged at the high end of the arc block of the inner limiting block (8). The connection points between the gas-breaking members (9) and the two outer limiting blocks (7) correspond to each other.

5. The degassing device for the high-temperature water system of a low-speed engine according to claim 4, characterized in that, The gas-breaking member (9) includes: Gas-breaking cavity (90), a gas-breaking cavity (90) is jointly opened on the wall surface of the inner limiting block (8) and the wall surface of the exhaust pipe (6); Gas-breaking needle (91), the gas-breaking needle (91) is movably arranged in the gas-breaking cavity (90). The outer wall of the gas-breaking needle (91) is movably sleeved with the inner ring of the sealing ring, and the outer ring of the sealing ring is fixedly sleeved with the inner wall of the gas-breaking cavity (90) close to the spiral member (5); Gas-breaking block (92), the tail end of the gas-breaking needle (91) is fixedly connected to the gas-breaking block (92), and the cross-sectional dimension of the gas-breaking block (92) is adapted to the cross-sectional dimension of the gas-breaking cavity (90). The gas-breaking block (92) has an N-type magnetism, and one side wall surface of the gas-breaking block (92) is connected to the side wall of the sealing ring through a tension spring.

6. The degassing device for the high-temperature water system of a low-speed engine according to claim 5, characterized in that, The inner limiting block (8) further includes: Moving cavity (80), a moving cavity (80) is opened inside the inner limiting block (8) between the two vertically arranged gas-breaking members (9), and the upper and lower parts of one end of the moving cavity (80) partially overlap with the gas-breaking cavities (90) above and below the moving cavity (80); Moving block (81), a moving block (81) is movably sleeved inside the moving cavity (80), and one side of the moving block (81) is fixedly connected to the inner wall of the other end of the moving cavity (80) through a compression spring. The moving block (81) has an S-type magnetism; Fixed film (82), a column cavity is opened inside the column block, and the inner wall of the column cavity is fixedly connected to the outer surface of the fixed film (82). The fixed film (82) is filled with a certain amount of gas. The fixed film (82) is made of hard rubber material; Fixed tube (83), the fixed tube (83) is fixedly sleeved inside the inner limit block (8), and one end of the fixed tube (83) is fixedly communicated with the fixed film (82), the other end of the fixed tube (83) is fixedly connected to the moving cavity (80), three fixed tubes (83) are correspondingly arranged for one fixed film (82), and one fixed tube (83) corresponds to one moving cavity (80).

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