Valve bank unit for marine methanol boiler

Abstract

The invention discloses a valve group unit for a marine methanol boiler, and relates to the technical field of valve group units for marine methanol fuel boilers. The three-way valve is adopted to replace a traditional straight-through valve, the number of valves and connectors is reduced, the leakage risk is reduced, and the lightweight design of the valve bank is achieved. The control system is simplified, and the starting time of fuel supply is shortened. According to the flow regulating valve, the combined design that the regulating petals are inserted and the rotating disc is shielded is adopted, accurate control over flow is achieved through staggering and aligning of the movable circular holes and the static circular holes, and the opening degree of the valve can be flexibly adjusted within the range of 0-100%. According to the design of the valve group, the safety, the reliability and the operation efficiency of the system are improved, and the requirements of the marine methanol boiler for high efficiency, safety and accurate control are met.

Description

Technical Field

[0001] The invention relates to the technical field of valve group units for marine methanol fuel boilers, in particular to a valve group unit for marine methanol boilers. Background Art

[0002] In recent years, methanol valve groups have been widely used in marine main engines and generators, but there are very few actual matching in the field of marine boilers. In addition, there are large differences in the fuel flow control logic between the main engine atomizer and the boiler burner. Methanol valve groups are still in the research and demonstration stage in the boiler field. The present invention aims to simplify the system composition and its control procedures, and reduce the risk of methanol leakage in the valve group under the premise of ensuring the system operation flow control, nitrogen replacement, and methanol fuel cut-off functions. The technical solution adopted by the present invention is to replace two straight-through valves with three-way valves, reduce the number of valves, and delete the unnecessary automatic leak detection program between the double cut-off valves. The safety function and operation function are realized by program control of the valve position, and the methanol fuel is prevented from flowing into the nitrogen pipeline. The methanol fuel boiler valve group unit is made safe, fully functional, efficient and lightweight. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a valve group unit for a marine methanol boiler, characterized by: a first three-way valve, a second three-way valve, a third three-way valve, a first straight-through valve, a second straight-through valve, a second check valve, a first check valve, a flow regulating valve, a temperature sensor, a first pressure sensor, and a second pressure sensor; the valve group can realize the operation flow control, nitrogen replacement, methanol fuel cut-off, i.e., equipment shutdown function through the logic control of the valve position; the nitrogen replacement procedure from the second three-way valve to the burner pipeline includes opening the second straight-through valve, and nitrogen passes through the first check valve, the second three-way valve, and the flow regulating valve in sequence, A nitrogen replacement is realized from the second three-way valve to the burner pipeline; the first straight valve located at the front end of the methanol supply is closed, and the first three-way valve is in the fuel cut-off position, and nitrogen cannot pass through the third three-way valve and the second check valve to the front end pipeline of the first three-way valve; the nitrogen replacement procedure for the front section of the first three-way valve includes opening the first straight valve and the second straight valve, and the first three-way valve is in the fuel cut-off position, and nitrogen passes through the second straight valve, the third three-way valve, the second check valve, and the first straight valve in sequence to realize nitrogen replacement in the front section of the first three-way valve; the flow control valve opening is 0, and nitrogen cannot pass through the first check valve, the second three-way valve, and the flow control valve to the second three-way valve to the burner pipe section.

[0004] Preferably, the valve group operation procedure includes: controlling the first straight-through valve and the second straight-through valve for nitrogen replacement to be closed, and the third three-way valve to be switched to the nitrogen release position; the first three-way valve and the second three-way valve of the fuel pipeline are switched to the fuel flow position, and flow control is achieved by controlling the opening of the flow regulating valve. At the same time, the second pressure sensor is used to monitor whether the methanol pressure before entering the burner meets the requirements.

[0005] Preferably, the valve group shutdown state is that the first three-way valve and the second three-way valve are switched to the fuel cut-off position, wherein the valve position of the first three-way valve realizes the release of methanol pressure between the two valves, and the valve position of the second three-way valve is ready for nitrogen replacement from the valve back to the burner section.

[0006] Preferably, the temperature sensor and the first pressure sensor are used to determine whether the temperature and pressure of the imported fuel meet the valve group startup conditions; the first three-way valve and the second three-way valve are used for double cutting off of methanol fuel, taking into account the methanol pressure release and nitrogen purge between valves; the second check valve and the first check valve are used to prevent methanol fuel from flowing into the nitrogen pipeline; the third three-way valve is used for switching the functions of nitrogen purge and nitrogen release; the second straight-through valve is used to start and shut down the nitrogen gas source.

[0007] Preferably, the flow regulating valve includes a regulating channel tube, on the outer surface of which a control chamber is fixed along its radial direction, the control chamber is connected to the interior of the regulating channel tube, an inserted regulating flap is provided for sliding sealing inside the control chamber, and the inserted regulating flap is in contact and sealing cooperation with the inner wall of the regulating channel tube; the interior of the inserted regulating flap is hollow, and a shielding rotating disk is rotatably installed inside the inserted regulating flap, a plurality of moving circular holes are provided on the shielding rotating disk, a plurality of static circular holes are provided on the inserted regulating flap, and the staggered and aligned positions of the moving circular holes and the static circular holes are used to control the opening of the flow regulating valve, wherein the blocking area of ​​the inserted regulating flap inside the regulating channel tube is used to control the opening of the flow regulating valve.

[0008] Preferably, an adjusting executive gear, a worm wheel and a worm are rotatably mounted on the inner wall of the inserted adjusting flap, wherein the adjusting executive gear and the worm wheel are connected via a second transmission belt, the worm wheel and the worm are meshingly transmitted, a tooth shape that can mesh with the adjusting executive gear is provided on the circumferential surface of the shielding rotating disk, a sealing cover plate is fixedly sealed on the top of the inserted adjusting flap, and a hexagonal prism rod shaft that is fixedly and synchronously transmitted with the worm is rotatably provided on the sealing cover plate.

[0009] Preferably, a driving chamber is fixedly sealed at the top of the control chamber, a top cover plate and a bottom cover plate are fixed to the inner wall of the driving chamber, two threaded transmission pulleys are rotatably installed between the opposite surfaces of the top cover plate and the bottom cover plate, an adjusting screw is threadedly provided at the axis of each threaded transmission pulley, the two adjusting screws are arranged in parallel, and the bottom ends of the two adjusting screws are fixedly matched with the inserted adjusting flaps and the sealing cover plate, wherein the two threaded transmission pulleys are synchronously connected by a first transmission belt.

[0010] Preferably, a driving gear disc is fixed on one of the threaded transmission pulleys, and the driving gear disc is rotationally matched with the top cover plate and the adjusting screw; wherein a spline sleeve shaft is slidingly sleeved on the outer surface of the hexagonal prism shaft in a spline manner, and the spline sleeve shaft is rotationally matched with the top cover plate and the bottom cover plate.

[0011] Preferably, a first adjusting motor is fixed to the top of the driving chamber, and the output shaft of the first adjusting motor is fixedly matched with the top of the spline sleeve shaft. A second adjusting motor is also fixed on the inner wall of the driving chamber, and a driving gear is fixed on the output shaft of the second adjusting motor, and the driving gear is meshed with the driving gear disc for transmission.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) By adopting a three-way valve to replace the traditional straight-through valve, the number of valves in the valve group unit is reduced by no less than three. This design significantly reduces the number of valve interfaces, thereby reducing the potential risk of leakage. The reduction in the number of interfaces means a reduction in sealing points, thereby improving the overall safety of the system; (2) By optimizing the valve group design, the present invention reduces the number of valves and actuators, thereby significantly reducing the volume and weight of the valve group. The lightweight design not only saves installation space, but also helps to reduce manufacturing and maintenance costs. In the limited space of the ship, the saved space can be used for the installation of other key equipment, thereby improving the comprehensive performance and economic benefits of the ship; (3) The present invention simplifies the program control system. This improvement greatly shortens the startup time of the fuel supply and enables the equipment to enter the working state more quickly; (4) The flow control valve of the present invention adopts a combined design of an inserted regulating flap and a shielding rotating disk, and realizes precise control of the flow rate through the staggered and aligned moving circular holes and static circular holes. The valve opening can be flexibly adjusted within the range of 0-100% to meet the flow requirements under different working conditions; (5) Due to the reduction in the number of valves and interfaces, the complexity of the system is reduced, and maintenance work becomes easier. Fewer components and interfaces mean fewer failure points, which reduces the failure rate of equipment. The simplification of maintenance work not only saves manpower and time costs, but also improves the reliability and availability of the system, ensuring the continuity and safety of ship operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the valve group unit for the methanol boiler of the present invention.

[0014] Figure 2 It is a schematic diagram of the overall structure of the flow control valve of the present invention.

[0015] Figure 3 This is a schematic diagram of the structure of the regulating channel tube of the present invention.

[0016] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle.

[0017] Figure 5 A schematic diagram of the structure of the regulating flap is inserted into the present invention.

[0018] Figure 6 For the present invention Figure 5Schematic diagram of the structure at point B in the middle.

[0019] Figure 7 This is a schematic diagram of the internal structure of the insert regulating flap of the present invention.

[0020] Figure 8 This is a schematic diagram of the structure of the shielding rotating disk of the present invention.

[0021] In the figure: 1-flow control valve; 101-adjustment channel tube; 102-control chamber; 103-drive chamber; 104-first adjustment motor; 105-spline sleeve shaft; 106-second adjustment motor; 107-drive toothed disc; 108-drive gear; 109-top cover plate; 110-bottom cover plate; 111-adjustment screw rod; 112-insert adjustment flap; 113-first transmission belt; 114-threaded transmission pulley; 115-hexagonal prism rod shaft ; 116-blocking rotating disk; 117-moving circular hole; 118-static circular hole; 119-adjusting execution gear; 120-second transmission belt; 121-sealing cover plate; 122-worm; 123-worm wheel; 2-temperature sensor; 3-first pressure sensor; 4-first three-way valve; 5-second three-way valve; 6-first straight-through valve; 7-second pressure sensor; 8-second check valve; 9-first check valve; 10-third three-way valve; 11-second straight-through valve. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-Figure 8 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0023] The present invention provides a valve group unit for a marine methanol boiler, comprising a first three-way valve 4, a second three-way valve 5, a third three-way valve 10, a first straight-through valve 6, a second straight-through valve 11, a second check valve 8, a first check valve 9, a flow regulating valve 1, a temperature sensor 2, a first pressure sensor 3, and a second pressure sensor 7; the valve group can realize operating flow control, nitrogen replacement, and methanol fuel cut-off, i.e., equipment shutdown functions through logical control of valve positions.

[0024] The nitrogen replacement procedure from the second three-way valve 5 to the burner pipeline includes: opening the second straight-through valve 11, and nitrogen passes through the first check valve 9, the second three-way valve 5, and the flow regulating valve 1 in sequence to achieve nitrogen replacement from the second three-way valve 5 to the burner pipeline; the first straight-through valve 6 located at the front end of the methanol supply is closed, and the first three-way valve 4 is in the fuel cut-off position, and nitrogen cannot pass through the third three-way valve 10 and the second check valve 8 to the front end pipeline of the first three-way valve 4.

[0025] The nitrogen replacement procedure in the front section of the first three-way valve 4 includes: opening the first straight valve 6 and the second straight valve 11, the first three-way valve 4 is in the fuel cut-off position, and the nitrogen passes through the second straight valve 11, the third three-way valve 10, the second check valve 8, and the first straight valve 6 in sequence to achieve nitrogen replacement in the front section of the first three-way valve 4; the opening of the flow regulating valve 1 is 0, and the nitrogen cannot pass through the first check valve 9, the second three-way valve 5, the flow regulating valve 1 to the second three-way valve 5 and then to the burner pipe section.

[0026] The valve group operation procedure includes: controlling the closing of the first straight-through valve 6 and the second straight-through valve 11 for nitrogen replacement, and switching the third three-way valve 10 to the nitrogen release position; switching the first three-way valve 4 and the second three-way valve 5 of the fuel pipeline to the fuel flow position, and realizing flow control by controlling the opening of the flow regulating valve 1. At the same time, the second pressure sensor 7 is used to monitor whether the methanol pressure before entering the burner meets the requirements.

[0027] The valve group shutdown state is that the first three-way valve 4 and the second three-way valve 5 are switched to the fuel cut-off position, wherein the valve position of the first three-way valve 4 realizes the release of methanol pressure between the two valves, and the valve position of the second three-way valve 5 is ready for nitrogen replacement from the valve to the burner section.

[0028] The temperature sensor 2 and the first pressure sensor 3 are used to determine whether the temperature and pressure of the imported fuel meet the valve group startup conditions; the first three-way valve 4 and the second three-way valve 5 are used for double cutting off of methanol fuel, taking into account the methanol pressure release and nitrogen purge between valves; the second check valve 8 and the first check valve 9 are used to prevent methanol fuel from flowing into the nitrogen pipeline; the third three-way valve 10 is used for switching the functions of nitrogen purge and nitrogen release; the second straight-through valve 11 is used to start and shut down the nitrogen gas source.

[0029] The flow control valve 1 includes a regulating channel tube 101, on the outer surface of which a control chamber 102 is fixed along its radial direction, the control chamber 102 is arranged to communicate with the interior of the regulating channel tube 101, and an inserted regulating flap 112 is arranged in a sliding seal inside the control chamber 102, and the inserted regulating flap 112 is in contact and sealed cooperation with the inner wall of the regulating channel tube 101; the interior of the inserted regulating flap 112 is hollow, and a shielding rotating disk 116 is rotatably installed inside the inserted regulating flap 112, a plurality of moving circular holes 117 are provided on the shielding rotating disk 116, and a plurality of static circular holes 118 are provided on the inserted regulating flap 112, and the staggered and aligned positions of the moving circular holes 117 and the static circular holes 118 are used to control the opening of the flow control valve 1, wherein the blocking area of ​​the inserted regulating flap 112 inside the regulating channel tube 101 is used to control the opening of the flow control valve 1. An adjusting execution gear 119, a worm wheel 123 and a worm 122 are rotatably mounted on the inner wall of the insert adjusting flap 112, wherein the adjusting execution gear 119 and the worm wheel 123 are connected via a second transmission belt 120, and the worm wheel 123 and the worm 122 are meshingly transmitted, and a tooth shape that can mesh with the adjusting execution gear 119 is provided on the circumferential surface of the shielding rotating disk 116, and a sealing cover plate 121 is fixedly sealed on the top of the insert adjusting flap 112, and a hexagonal prism rod shaft 115 that is fixedly and synchronously transmitted with the worm 122 is rotatably provided on the sealing cover plate 121. A driving chamber 103 is fixedly sealed at the top of the control chamber 102, and a top covering plate 109 and a bottom covering plate 110 are fixed to the inner wall of the driving chamber 103. Two threaded transmission pulleys 114 are rotatably installed between the opposite surfaces of the top covering plate 109 and the bottom covering plate 110. An adjusting screw rod 111 is threadedly provided at the axis of each threaded transmission pulley 114. The two adjusting screw rods 111 are arranged in parallel, and the bottom ends of the two adjusting screw rods 111 are fixedly matched with the inserted adjusting flap 112 and the sealing cover plate 121, wherein the two threaded transmission pulleys 114 are synchronously connected through a first transmission belt 113. A driving toothed disc 107 is fixed on one of the threaded transmission pulleys 114, and the driving toothed disc 107 is rotationally matched with the top cover plate 109 and the adjusting screw 111; a spline sleeve shaft 105 is slidably sleeved on the outer surface of the hexagonal prism shaft 115 in a spline manner, and the spline sleeve shaft 105 is rotationally matched with the top cover plate 109 and the bottom cover plate 110. A first adjusting motor 104 is fixed on the top of the driving chamber 103, and the output shaft of the first adjusting motor 104 is fixedly matched with the top of the spline sleeve shaft 105. A second adjusting motor 106 is also fixed on the inner wall of the driving chamber 103, and a driving gear 108 is fixed on the output shaft of the second adjusting motor 106, and the driving gear 108 is meshed with the driving toothed disc 107 for transmission.

[0030] Replacing the straight-through valve with a three-way valve reduces the number of valves in the valve group unit to no less than three, reduces the number of valve interfaces, reduces the risk of leakage, and also achieves a lightweight design of the valve group unit; the automatic leak detection program in the double-stop breathable valve is deleted, the program control system is simplified, and the fuel supply startup time is shortened; the valve group replaces two straight-through valves with a three-way valve, reducing the number of valves, the number of actuators, control mechanisms, and valve interfaces, reducing the size of the valve group, reducing the unit weight, and reducing the risk of methanol leakage.

[0031] Control the first adjusting motor 104, the output shaft of the first adjusting motor 104 drives the spline sleeve shaft 105 to rotate, the rotation of the spline sleeve shaft 105 drives the hexagonal prism shaft 115 to rotate, the rotation of the hexagonal prism shaft 115 drives the worm 122 to rotate, the rotation of the worm 122 drives the worm wheel 123 to rotate, the rotation of the worm wheel 123 drives the adjusting execution gear 119 to rotate through the second transmission belt 120, the rotation of the adjusting execution gear 119 drives the shielding rotating disk 116 to rotate, at this time, the moving circular hole 117 and the static circular hole 118 will be staggered or aligned, and the staggered area of ​​the moving circular hole 117 and the static circular hole 118 can be controlled by the rotation angle of the output shaft of the first adjusting motor 104, thereby controlling the flow rate of the fluid, and also controlling the opening of the flow control valve 1. The second regulating motor 106 is controlled, and the output shaft of the second regulating motor 106 drives the driving gear 108 to rotate, and the driving gear 108 drives the driving toothed disc 107 to rotate, and the driving toothed disc 107 drives one of the threaded transmission pulleys 114 to rotate, and the two threaded transmission pulleys 114 will rotate synchronously through the first transmission belt 113, and at this time, the threaded transmission pulley 114 will drive the adjusting screw rod 111 matched with the threaded transmission to move along its own axial straight line, and the movement of the adjusting screw rod 111 will drive the inserted regulating flap 112 to move, so that the inserted regulating flap 112 can be inserted from the inside of the regulating channel tube 101. By withdrawing or inserting, the cross-sectional area of ​​the fluid flowing through the regulating channel tube 101 is changed, thereby controlling the opening of the flow regulating valve 1, wherein the flow of the fluid can be more accurately controlled by controlling the size of the staggered area of ​​the moving circular hole 117 and the static circular hole 118, and by controlling the movement of the inserted regulating flap 112 inside the regulating channel tube 101, the fluid can pass through the regulating channel tube 101 more quickly (such as fully opening or fully closing), so through the coordination of the two, more precise flow control can be achieved (such as the opening of the flow regulating valve 1 is 0-100%).

Claims

1. A valve group unit for a marine methanol boiler, characterized in that: A first three-way valve (4), a second three-way valve (5), a third three-way valve (10), a first straight-through valve (6), a second straight-through valve (11), a second check valve (8), a first check valve (9), a flow control valve (1), a temperature sensor (2), a first pressure sensor (3), and a second pressure sensor (7); the valve group can realize the functions of operating flow control, nitrogen replacement, and methanol fuel cut-off, i.e., equipment shutdown, through the logic control of valve positions; The nitrogen replacement procedure from the second three-way valve (5) to the burner pipeline includes: opening the second straight-through valve (11), and nitrogen sequentially passes through the first check valve (9), the second three-way valve (5), and the flow regulating valve (1) to achieve nitrogen replacement from the second three-way valve (5) to the burner pipeline; the first straight-through valve (6) located at the front end of the methanol supply is closed, and the first three-way valve (4) is in the fuel cut-off position so that nitrogen cannot pass through the third three-way valve (10), the second check valve (8) to the front end pipeline of the first three-way valve (4); The nitrogen replacement procedure for the front section of the first three-way valve (4) includes: opening the first straight valve (6) and the second straight valve (11), the first three-way valve (4) is in the fuel cut-off position, and the nitrogen passes through the second straight valve (11), the third three-way valve (10), the second check valve (8), and the first straight valve (6) in sequence to achieve nitrogen replacement for the front section of the first three-way valve (4); the flow control valve (1) is opened to 0, and the nitrogen cannot pass through the first check valve (9), the second three-way valve (5), the flow control valve (1) to the second three-way valve (5) and then to the burner pipe section.

2. A valve group unit for a marine methanol boiler according to claim 1, characterized in that: The valve group operation procedure includes: controlling the first straight-through valve (6) and the second straight-through valve (11) for nitrogen replacement to be closed, and the third three-way valve (10) to be switched to the nitrogen release position; the first three-way valve (4) and the second three-way valve (5) of the fuel pipeline to be switched to the fuel flow position, and the flow control is achieved by controlling the opening of the flow regulating valve (1), and the second pressure sensor (7) is used to monitor whether the methanol pressure before entering the burner meets the requirements.

3. A valve group unit for a marine methanol boiler according to claim 2, characterized in that: The valve group is in a shutdown state in which the first three-way valve (4) and the second three-way valve (5) are switched to the fuel cut-off position, wherein the valve position of the first three-way valve (4) enables the release of methanol pressure between the two valves, and the valve position of the second three-way valve (5) prepares for nitrogen replacement from the valve back to the burner section.

4. A valve group unit for a marine methanol boiler according to claim 3, characterized in that: The temperature sensor (2) and the first pressure sensor (3) are used to determine whether the temperature and pressure of the inlet fuel meet the valve group start-up conditions; the first three-way valve (4) and the second three-way valve (5) are used for double-cutting off the methanol fuel, taking into account the methanol pressure release and nitrogen purge between the valves; the second check valve (8) and the first check valve (9) are used to prevent the methanol fuel from flowing into the nitrogen pipeline; the third three-way valve (10) is used for switching the functions of nitrogen purge and nitrogen release; and the second straight-through valve (11) is used to start and shut down the nitrogen gas source.

5. The valve group unit for a marine methanol boiler according to claim 4, characterized in that: The flow control valve (1) comprises a control channel tube (101), a control chamber (102) being fixed on the outer surface of the control channel tube (101) along its radial direction, the control chamber (102) being arranged to communicate with the interior of the control channel tube (101), an insert control flap (112) being arranged in a sliding seal inside the control chamber (102), the insert control flap (112) being in contact and sealing cooperation with the inner wall of the control channel tube (101); the interior of the insert control flap (112) being arranged to be hollow, A shielding rotating disk (116) is rotatably mounted in the insert regulating flap (112), a plurality of movable circular holes (117) are provided on the shielding rotating disk (116), and a plurality of static circular holes (118) are provided on the insert regulating flap (112). The positions of the movable circular holes (117) and the static circular holes (118) are staggered and aligned to control the opening of the flow regulating valve (1), wherein the blocking area of ​​the insert regulating flap (112) inside the regulating channel tube (101) is used to control the opening of the flow regulating valve (1).

6. The valve group unit for a marine methanol boiler according to claim 5, characterized in that: An adjusting execution gear (119), a worm wheel (123) and a worm (122) are rotatably mounted on the inner wall of the insert adjusting flap (112), wherein the adjusting execution gear (119) and the worm wheel (123) are connected to each other via a second transmission belt (120), and the worm wheel (123) and the worm (122) are meshed and driven. A tooth shape capable of meshing with the adjusting execution gear (119) is provided on the circumferential surface of the shielding rotating disk (116), and a sealing cover plate (121) is fixedly sealed at the top of the insert adjusting flap (112), and a hexagonal prism shaft (115) is rotatably provided on the sealing cover plate (121) and is fixedly and synchronously driven with the worm (122).

7. A valve group unit for a marine methanol boiler according to claim 6, characterized in that: A driving chamber (103) is fixedly sealed at the top of the control chamber (102), and a top cover plate (109) and a bottom cover plate (110) are fixedly mounted on the inner wall of the driving chamber (103). Two threaded transmission pulleys (114) are rotatably mounted between the opposing surfaces of the top cover plate (109) and the bottom cover plate (110), and an adjusting screw rod (111) is threadedly arranged at the axis of each threaded transmission pulley (114). The two adjusting screw rods (111) are arranged in parallel, and the bottom ends of the two adjusting screw rods (111) are fixedly matched with the inserted adjusting flap (112) and the sealing cover plate (121), wherein the two threaded transmission pulleys (114) are synchronously driven and connected via a first transmission belt (113).

8. The valve group unit for a marine methanol boiler according to claim 7, characterized in that: A driving toothed disc (107) is fixed on one of the threaded transmission pulleys (114), and the driving toothed disc (107) is rotationally matched with the top cover plate (109) and the adjusting screw rod (111); a spline sleeve shaft (105) is slidably sleeved on the outer surface of the hexagonal prism shaft (115) in a spline manner, and the spline sleeve shaft (105) is rotationally matched with the top cover plate (109) and the bottom cover plate (110).

9. The valve group unit for a marine methanol boiler according to claim 8, characterized in that: A first regulating motor (104) is fixed to the top of the driving chamber (103); an output shaft of the first regulating motor (104) is fixedly matched with a top end of a spline sleeve shaft (105); a second regulating motor (106) is also fixed to the inner wall of the driving chamber (103); a driving gear (108) is fixed to the output shaft of the second regulating motor (106); and the driving gear (108) is meshed with a driving toothed disc (107) for transmission.

Images