Quick-closing valve hydraulic servo-motor control device for steam turbine

Abstract

The invention relates to the technical field of hydraulic servo-motors, in particular to a steam turbine quick-closing valve hydraulic servo-motor control device which comprises a main body shell, an internal thread ring is rotatably connected to the outer surface of the main body shell, an upper oil tank is rotatably connected to the outer surface of the internal thread ring, and a connecting pipe is fixedly connected to the lower surface of the upper oil tank. A lower oil tank is welded to the outer surface, corresponding to the lower portion of the upper oil tank, of the main body shell, a control main valve body is arranged on the inner side of the main body shell, a collecting frame and an oil outlet pipe are arranged on the periphery of the control main valve body, and the lower oil tank, the oil outlet pipe and the collecting frame communicate with the control main valve body; the control main valve body controls the lower oil tank to be communicated with the oil outlet pipe or the lower oil tank to be communicated with the collecting frame, a recycling oil pipe is fixedly connected to the outer surface of the collecting frame, a collecting box is fixedly connected to the outer surface, away from the collecting frame, of the recycling oil pipe, a lower output pipe is welded to the lower surface of the main body shell, and the oil outlet pipe is communicated to the lower output pipe.

Description

Technical Field

[0001] The invention relates to the technical field of oil motors, in particular to a quick-closing valve oil motor control device for a steam turbine. Background Art

[0002] A quick-closing valve oil motor control device for a steam turbine is a hydraulic device used to control the opening and closing of a steam turbine quick-closing valve. Quick-closing valves are commonly used in steam turbine systems to quickly cut off steam flow in the event of an emergency to protect equipment and personnel. The oil motor is hydraulically driven to quickly and reliably operate the quick-closing valve, ensuring that the steam turbine can be quickly shut down or steam can be cut off in an emergency to prevent accidents. The design of the oil motor usually takes into account requirements such as high efficiency, fast response, and high temperature resistance to ensure its stability and reliability under high pressure, high temperature, and complex working conditions. It plays a vital role in safety assurance in modern large-scale power plants such as thermal power and nuclear power, so there is a need to provide a quick-closing valve oil motor with higher safety. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a quick closing valve oil motor control device for a steam turbine, and the specific technical solution is as follows:

[0004] A quick-closing valve oil motor control device for a steam turbine includes a main body shell, the outer surface of the main body shell is rotatably connected to an internal threaded ring, the outer surface of the internal threaded ring is rotatably connected to an upper oil tank, the lower surface of the upper oil tank is fixedly connected to a connecting pipe, and a lower oil tank is welded to the outer surface of the main body shell corresponding to the lower side of the upper oil tank, a control main valve body is provided on the inner side of the main body shell, a collecting frame and an oil outlet pipe are provided around the control main valve body, the lower oil tank, the oil outlet pipe and the collecting frame are respectively connected to the control main valve body, the control main valve body controls the connection between the lower oil tank and the oil outlet pipe or the connection between the lower oil tank and the collecting frame, the outer surface of the collecting frame is fixedly connected to a recovery oil pipe, the recovery oil pipe is fixedly connected to the collection box away from the outer surface of the collecting frame, a lower output pipe is welded to the lower surface of the main body shell, and the oil outlet pipe is connected to the lower output pipe.

[0005] In some embodiments, the interior of the control main valve body is provided with an access channel, a first output channel, a second output channel, an adjusting cavity and a valve body slider, the access channel, the first output channel and the second output channel are respectively connected to the adjusting cavity, the access channel is connected to the lower oil tank, the first output channel is connected to the oil outlet pipe, the second output channel is connected to the collection frame, the valve body slider is slidably set in the adjusting cavity, and the position of the valve body slider in the adjusting cavity is adjusted to control the connection between the access channel and the first output channel or the second output channel.

[0006] In some embodiments, a cylinder is fixedly connected to the inner surface above the main shell, a force ring is fixedly connected to the outer surface of the cylinder output end, the force ring is fixedly connected to the valve body slider, and a first inner channel and a second inner channel are provided inside the valve body slider. When the valve body slider is raised, the access channel is connected to the first output channel through the first inner channel, and when the valve body slider is pressed down, the access channel is connected to the second output channel through the second inner channel.

[0007] In some embodiments, a fixed cover is provided on the top of the control main valve body, and a fixed piston is vertically provided at the lower end of the fixed cover, and a middle communicating chamber, a third inner channel and a fourth inner channel are vertically provided inside the valve body slider, and the valve body slider is fitly arranged in the middle communicating chamber, and a pressure spring is provided between the fixed cover and the valve body slider, and the pressure spring generates downward pressure on the valve body slider, and the third inner channel and the fourth inner channel are staggered, and the third inner channel is connected to the access channel, and the fourth inner channel is connected to the second output channel, and the middle communicating chamber is connected to the first output channel. The hydraulic pressure in the first output channel pushes the valve body slider to move upward, and the fixed piston of the rising valve body slider is located between the third inner channel and the fourth inner channel, and the access channel is connected to the second output channel through the third inner channel and the middle communicating chamber, and the fixed piston of the pressing down valve body slider is located below the third inner channel and the fourth inner channel, and the access channel is connected to the first output channel through the third inner channel and the fourth inner channel.

[0008] In some embodiments, the outer surface of the main shell is fixedly connected to a negative pressure frame, the outer surface of the lower output pipe is fixedly connected to a negative pressure buffer pump, and the outer surface of the output end of the negative pressure buffer pump is fixedly connected to the negative pressure frame.

[0009] In some embodiments, the outer surface of the output end of the negative pressure buffer pump is fixedly connected to the collection box.

[0010] In some embodiments, a connecting valve is fixedly connected to the outer surface of the collection box, and an outer surface of the internal threaded ring corresponding to the connecting valve is fixedly connected to an entry box, and a pressure pump is provided on the outer surface of the entry box.

[0011] In some embodiments, a lower support ring is welded to the outer surface of the oil outlet pipe, and a side fixing plate is welded to the upper surface of the main body shell.

[0012] In some embodiments, the outer surface of the main body shell is provided with a reinforcing outer ring, the outer surface of the reinforcing outer ring is provided with a lower fixing plate, and the outer surface of the lower fixing plate is provided with an auxiliary splint.

[0013] In some embodiments, an upper reinforcement block is provided on the middle upper surface of the main shell, and an upper fixing plate is welded to the outer surface of the upper reinforcement block.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] First: In this solution, a control main valve body is provided, which controls the connection between the lower oil tank and the oil outlet pipe or the connection between the lower oil tank and the collection frame. During the operation of the hydraulic motor, when the oil pressure is normal, the oil is output through the access channel and the first output channel. When the oil pressure is too high, the equipment is abnormal. At this time, the oil flows back through the access channel and the second output channel, thereby preventing the oil from continuously passing through the lower output pipe and causing abnormal operation of the equipment and damage.

[0016] Secondly, this solution provides a control main valve body that automatically adjusts according to the hydraulic pressure. When the hydraulic pressure of the lower oil tank part is too large, the valve body slider will be pushed upward, and the oil will be output to the second output channel through the access channel for reflux, thereby preventing the oil pressure in the lower oil tank from being too high and causing damage to the equipment. When the oil pressure in the lower oil tank part is restored, the pressure spring will rebound and push the valve body slider downward, reconnecting the access channel and the first output channel. At this time, the oil enters the lower oil tank for normal output.

[0017] Third: The inner surface of the oil outlet pipe is provided with an oleophobic coating. The oil outlet pipe ensures smooth oil flow, especially for equipment that needs to run for a long time or in a high-pressure working environment. In this case, the surface of the oil outlet pipe is provided with an oleophobic coating. This coating has excellent oil-resistance properties, which can prevent the accumulation of oil stains and impurities in the pipe, ensuring unobstructed oil flow. The oleophobic coating can effectively reduce the friction and deposition generated by the oil when flowing through the pipe, avoiding the reduction of flow or equipment failure due to the viscosity and blockage of the oil. The smooth flow of the oil path is one of the key factors to ensure the long-term stable operation of the equipment. The application of oleophobic coating not only improves the durability of the oil pipe, but also reduces the frequency of maintenance and cleaning, extending the service life of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a quick closing valve oil motor control device for a steam turbine in this application. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of a quick closing valve oil motor control device for a steam turbine in this application. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of a quick closing valve oil motor control device for a steam turbine in this application. Figure 3 ;

[0021] Figure 4 This is a schematic diagram of the disassembled structure of a quick-closing valve oil motor control device for a steam turbine in this application;

[0022] Figure 5 This is a schematic diagram of the internal structure of a quick closing valve oil motor control device for a steam turbine in this application. Figure 1 ;

[0023] Figure 6 This is a schematic diagram of the internal structure of a quick closing valve oil motor control device for a steam turbine in this application. Figure 2 ;

[0024] Figure 7 This is the operating status diagram of the first embodiment of the control main valve body in this application. Figure 1 ;

[0025] Figure 8 This is the operating status diagram of the first embodiment of the control main valve body in this application. Figure 2 ;

[0026] Figure 9 This is the operating status diagram of the second embodiment of the control main valve body in this application. Figure 1 ;

[0027] Figure 10 This is the operating status diagram of the second embodiment of the control main valve body in this application. Figure 2 .

[0028] Reference numerals: 1, main body shell; 2, internal thread ring; 3, upper oil tank; 4, connecting pipe; 5, lower oil tank; 6, control main valve body; 61, access channel; 62, first output channel; 63, second output channel; 64, adjustment cavity; 65, fixed cover; 651, fixed piston; 7, valve body slider; 71, first inner channel; 72, second inner channel; 73, middle connecting cavity; 74, third inner channel; 75, fourth inner channel ;76. Pressure spring;8. Oil outlet pipe;9. Lower output pipe;10. Cylinder;11. Force ring;12. Negative pressure frame;13. Negative pressure buffer pump;14. Collection frame;15. Recovery oil pipe;16. Collection box;17. Connecting valve;18. Inlet box;19. Pressure pump;20. Lower support ring;21. Side fixing plate;22. Lower fixing plate;23. Auxiliary splint;24. Reinforced outer ring;25. Upper reinforcement block;26. Upper fixing plate. DETAILED DESCRIPTION

[0029] The following embodiments of the present disclosure are further described in detail with reference to the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are intended to illustrate the principles of the present disclosure, but are not intended to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but rather includes all technical solutions within the scope of the claims.

[0030] The present disclosure provides these embodiments in order to make this disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be interpreted as merely exemplary, and not as limiting.

[0031] It should be noted that, in the description of this disclosure, unless otherwise specified, "plurality" means greater than or equal to two; terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are intended solely to facilitate and simplify the description of this disclosure, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0032] In addition, the terms "first," "second," and similar terms used in this disclosure do not denote any order, quantity, or importance, but are merely used to distinguish different parts. "Perpendicular" does not mean perpendicular in the strict sense, but rather means within the tolerance range. "Parallel" does not mean parallel in the strict sense, but rather means within the tolerance range. "Include" or "comprising" and similar terms mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of also including other elements.

[0033] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this disclosure depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intervening device between the specific device and the first or second device.

[0034] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined as such herein.

[0035] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0036] like Figures 1 to 10 As shown, a quick-closing valve oil motor control device for a steam turbine includes a main body shell 1, the outer surface of the main body shell 1 is rotatably connected to an internal threaded ring 2, the outer surface of the main body shell 1 is provided with an internal threaded ring 2, and an upper oil tank 3 is threadedly connected to the internal threaded ring 2. The entire device rotates the internal threaded ring 2, and the threaded structure between the main body shell 1 and the internal threaded ring 2 drives the internal threaded ring 2 to adjust its height. The outer surface of the internal threaded ring 2 is rotatably connected to the upper oil tank 3, and the lower surface of the upper oil tank 3 is fixedly connected to a connecting pipe 4. The main body shell 1 is welded with a lower oil tank 5 on the outer surface below the upper oil tank 3. The connecting pipe 4 generates a stable oil circuit through the connection with the lower oil tank 5. The oil pressure difference between the upper oil tank 3 and the lower oil tank 5 is determined to facilitate stable output. A control main valve body 6 is provided on the inner side of the main shell 1, and a collecting frame 14 and an oil outlet pipe 8 are provided around the control main valve body 6. The lower oil tank 5, the oil outlet pipe 8 and the collecting frame 14 are respectively connected to the control main valve body 6. The control main valve body 6 controls the connection between the lower oil tank 5 and the oil outlet pipe 8 or the connection between the lower oil tank 5 and the collecting frame 14. The outer surface of the collecting frame 14 is fixedly connected with a recovery oil pipe 15, and the recovery oil pipe 15 is fixedly connected with a collection box 16 away from the outer surface of the collecting frame 14. A lower output pipe 9 is welded to the lower surface of the main shell 1, and the oil outlet pipe 8 is connected to the lower output pipe 9.

[0037] In the above embodiment, the interior of the control main valve body 6 is provided with an access channel 61, a first output channel 62, a second output channel 63, an adjusting cavity 64 and a valve body slider 7. The access channel 61, the first output channel 62 and the second output channel 63 are respectively connected to the adjusting cavity 64. The access channel 61 is connected to the lower oil tank 5, the first output channel 62 is connected to the oil outlet pipe 8, and the second output channel 63 is connected to the collection frame 14. The valve body slider 7 is slidably set in the adjusting cavity 64. The position of the adjusting valve body slider 7 in the adjusting cavity 64 is used to control the connection between the access channel 61 and the first output channel 62 or the second output channel 63. During the operation of the hydraulic motor, when the oil pressure is normal, the oil is output through the access channel 61 and the first output channel 62. When the oil pressure is too high, the equipment is abnormal. At this time, the oil refluxes through the access channel 61 and the second output channel 63, thereby preventing the oil from continuously passing through the lower output pipe 9 and causing abnormal operation of the equipment and damage.

[0038] like Figure 7-8As shown, the first embodiment of the control main valve body 6: the inner surface above the main body shell 1 is fixedly connected to the cylinder 10, the outer surface of the output end of the cylinder 10 is fixedly connected to the force ring 11, the force ring 11 is fixedly connected to the valve body slider 7, and the interior of the valve body slider 7 is provided with a first inner channel 71 and a second inner channel 72. When the valve body slider 7 is raised, the access channel 61 is connected to the first output channel 62 through the first inner channel 71, and when the valve body slider 7 is pressed down, the access channel 61 is connected to the second output channel 63 through the second inner channel 72. In this embodiment, the cylinder 10 is used to drive the force ring 11 to adjust up and down, and the force ring 11 is used to drive the valve body slider 7 to adjust up and down. When the valve body slider 7 moves upward, the access channel 61 is connected with the first output channel 62. At this time, the oil can be output in sequence through the oil outlet pipe 8 and the lower output pipe 9. When the valve body slider 7 moves downward, the access channel 61 is connected with the second output channel 63. At this time, the oil can be re-collected into the upper oil tank 3 through the collection frame 14, the recovery oil pipe 15, the collection box 16 and the inlet box 18 for reciprocating use.

[0039] like Figure 9-10 As shown, embodiment 2 of the control main valve body 6: a fixed cover 65 is provided on the top of the control main valve body 6, and a fixed piston 651 is vertically provided downward at the lower end of the fixed cover 65, and a middle communicating chamber 73, a third inner channel 74 and a fourth inner channel 75 are vertically provided inside the valve body slider 7, and the valve body slider 7 is fitted in the middle communicating chamber 73, and a pressure spring 76 is provided between the fixed cover 65 and the valve body slider 7, and the pressure spring 76 generates downward pressure on the valve body slider 7, and the third inner channel 74 and the fourth inner channel 75 are staggered. The third inner channel 74 is connected to the access channel 61, and the fourth inner channel 75 is connected to the second output channel 63. The middle communicating chamber 73 is connected to the first output channel 62, and the hydraulic pressure in the first output channel 62 pushes the valve body slider 7 to move upward, and the fixed piston 651 of the rising valve body slider 7 is in the third inner channel 74. The cam 72 is in the process of being wound around the top of the oil tank 5, and the cam 73 is in the process of being wound around the top of the oil tank 5, so that the oil tank 5 can be turned around and the oil tank 5 can be turned around and the cam 73 is in the process of being wound around the top of the oil tank 5, so that the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank 5 can be turned around and the oil tank

[0040] In some embodiments, a force-bearing groove is provided on the upper surface of the internal threaded ring 2. The force-bearing groove can facilitate the rotation of the internal threaded ring 2 after contact, thereby realizing the adjustment of the internal threaded ring 2. The design of the force-bearing groove enables the component to generate effective friction or connection with the internal threaded ring 2 when in contact, thereby facilitating the rotation adjustment of the internal threaded ring 2 and avoiding the displacement of the position of the 2 caused by external force. The setting of the force-bearing groove can provide a more stable adjustment means to ensure the optimal operation stability of the equipment.

[0041] In some embodiments, the inner surface of the oil outlet pipe 8 is provided with an oleophobic coating to ensure smooth oil flow, especially for equipment that needs to operate for a long time or in a high-pressure working environment. In this case, the surface of the oil outlet pipe 8 is provided with an oleophobic coating. This coating has excellent oil-resistance properties and can prevent grease and impurities from accumulating in the pipe, ensuring unimpeded oil flow. The oleophobic coating can effectively reduce the friction and deposition generated by the oil when flowing through the pipe, avoiding flow reduction or equipment failure due to oil viscosity and blockage. The smooth flow of the oil path is one of the key factors to ensure the long-term stable operation of the equipment. The application of the oleophobic coating not only improves the durability of the oil pipe, but also reduces the frequency of maintenance and cleaning, extending the service life of the system.

[0042] In some embodiments, the main shell 1 is welded with a reinforced outer ring 24 on the outer surface below the lower oil tank 5, and the lower output pipe 9 is welded on the lower surface of the main shell 1. The reinforced outer ring 24 improves the overall structural strength. The oil discharged from the oil outlet pipe 8 will flow to the lower output pipe 9 under the action of gravity to be collected and discharged.

[0043] In some embodiments, a negative pressure frame 12 is fixedly connected to the outer surface of the main shell 1, a negative pressure buffer pump 13 is fixedly connected to the outer surface of the lower output pipe 9, and the outer surface of the output end of the negative pressure buffer pump 13 is fixedly connected to the negative pressure frame 12. The negative pressure buffer pump 13 outputs negative pressure at two locations, and one negative pressure frame 12 is located above the oil outlet pipe 8 to assist in the output of oil pressure, wherein the structure of the negative pressure buffer pump 13 can adopt the negative pressure pump disclosed in the prior art.

[0044] In some embodiments, the outer surface of the output end of the negative pressure buffer pump 13 is fixedly connected to the collection box 16. When the first output channel 62 and the second output channel 63 are connected to each other, the negative pressure generated in the collection frame 14 is used to promote the connection of the oil. The oil enters the recovery oil pipe 15 through the collection frame 14 and then enters the collection box 16 through the recovery oil pipe 15 for storage.

[0045] In some embodiments, a connecting valve 17 is fixedly connected to the outer surface of the collecting box 16, and an outer surface of the internal threaded ring 2 corresponding to the connecting valve 17 is fixedly connected to an entry box 18. A pressure pump 19 is provided on the outer surface of the entry box 18. The oil in the collecting box 16 is pumped into the entry box 18 through the pressure pump 19, and the oil in the entry box 18 enters the upper oil tank 3 for reuse.

[0046] In some embodiments, a lower support ring 20 is welded to the outer surface of the oil outlet pipe 8, and a side fixing plate 21 is welded to the upper surface of the main shell 1. The lower support ring 20 fixes and supports the oil outlet pipe 8, and the side fixing plate 21 provides a fixed support position for the equipment at the upper end, thereby improving the structural stability of the equipment.

[0047] In some embodiments, the outer surface of the main shell 1 is provided with a reinforcing outer ring 24, the outer surface of the reinforcing outer ring 24 is provided with a lower fixing plate 22, and the outer surface of the lower fixing plate 22 is provided with an auxiliary splint 23. The auxiliary splint 23 is supported by matching bolts to fix the equipment.

[0048] In some embodiments, an upper reinforcement block 25 is provided on the middle upper surface of the main shell 1, and an upper fixing plate 26 is welded to the outer surface of the upper reinforcement block 25. The upper reinforcement block 25 and the upper fixing plate 26 also provide a support position at the top to facilitate the fixation of the equipment.

[0049] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and are not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will readily devise other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the claims of the present invention.

Claims

1. A quick closing valve oil motor control device for a steam turbine, characterized in that: The invention comprises a main body shell (1), wherein the outer surface of the main body shell (1) is rotatably connected to an internal threaded ring (2), the outer surface of the internal threaded ring (2) is rotatably connected to an upper oil tank (3), the lower surface of the upper oil tank (3) is fixedly connected to a connecting pipe (4), the main body shell (1) is welded to an outer surface below the upper oil tank (3), a control main valve body (6) is provided on the inner side of the main body shell (1), a collecting frame (14) and an oil outlet pipe (8) are provided around the circumference of the control main valve body (6), the lower oil tank (5) is welded to an outer surface below the upper oil tank (3), a control main valve body (6) is provided on the inner side of the main body shell (1), a collecting frame (14) and an oil outlet pipe (8) are provided around the circumference of the control main valve body (6), and the lower oil tank (5) is welded to an outer surface below the upper oil tank (3). ), the oil outlet pipe (8) and the collecting frame (14) are respectively connected to the control main valve body (6), the control main valve body (6) controls the communication between the lower oil tank (5) and the oil outlet pipe (8) or the communication between the lower oil tank (5) and the collecting frame (14), the outer surface of the collecting frame (14) is fixedly connected with a recovery oil pipe (15), the recovery oil pipe (15) is fixedly connected with a collecting box (16) away from the outer surface of the collecting frame (14), the lower surface of the main body shell (1) is welded with a lower output pipe (9), and the oil outlet pipe (8) is connected to the lower output pipe (9).

2. A steam turbine quick closing valve oil motor control device according to claim 1, characterized in that: The control main valve body (6) is provided with an access channel (61), a first output channel (62), a second output channel (63), an adjustment cavity (64) and a valve body slider (7) inside. The access channel (61), the first output channel (62) and the second output channel (63) are respectively connected to the adjustment cavity (64). The access channel (61) is connected to the lower oil tank (5), the first output channel (62) is connected to the oil outlet pipe (8), and the second output channel (63) is connected to the collection frame (14). The valve body slider (7) is slidably arranged in the adjustment cavity (64). The position of the valve body slider (7) in the adjustment cavity (64) is adjusted to control the connection between the access channel (61) and the first output channel (62) or the second output channel (63).

3. A steam turbine quick closing valve oil motor control device according to claim 2, characterized in that: The upper inner surface of the main body shell (1) is fixedly connected to a cylinder (10), the outer surface of the output end of the cylinder (10) is fixedly connected to a force ring (11), the force ring (11) is fixedly connected to the valve body slider (7), and the interior of the valve body slider (7) is provided with a first inner channel (71) and a second inner channel (72). When the valve body slider (7) is raised, the access channel (61) is connected to the first output channel (62) through the first inner channel (71), and when the valve body slider (7) is pressed down, the access channel (61) is connected to the second output channel (63) through the second inner channel (72).

4. A steam turbine quick closing valve oil motor control device according to claim 2, characterized in that: The top of the control main valve body (6) is provided with a fixed cover (65), and the lower end of the fixed cover (65) is provided with a fixed piston (651) vertically downwardly. The interior of the valve body slider (7) is vertically provided with a middle communicating cavity (73), a third inner channel (74) and a fourth inner channel (75). The valve body slider (7) is fitted in the middle communicating cavity (73). A pressure spring (76) is provided between the fixed cover (65) and the valve body slider (7). The pressure spring (76) generates downward pressure on the valve body slider (7). The third inner channel (74) and the fourth inner channel (75) are staggered. The third inner channel (74) is connected to the access channel (61). The fourth inner channel ( The valve body slider (7) is connected to the second output channel (63) and the middle communicating chamber (73) is connected to the first output channel (62). The hydraulic pressure in the first output channel (62) pushes the valve body slider (7) to move upward. The fixed piston (651) of the rising valve body slider (7) is located between the third inner channel (74) and the fourth inner channel (75). The access channel (61) is connected to the second output channel (63) through the third inner channel (74) and the middle communicating chamber (73). The fixed piston (651) of the pressing valve body slider (7) is located below the third inner channel (74) and the fourth inner channel (75). The access channel (61) is connected to the first output channel (62) through the third inner channel (74) and the fourth inner channel (75).

5. The quick closing valve oil motor control device for a steam turbine according to claim 1, characterized in that: The outer surface of the main body shell (1) is fixedly connected to a negative pressure frame (12), the outer surface of the lower output pipe (9) is fixedly connected to a negative pressure buffer pump (13), and the outer surface of the output end of the negative pressure buffer pump (13) is fixedly connected to the negative pressure frame (12).

6. A steam turbine quick closing valve oil motor control device according to claim 5, characterized in that: The outer surface of the output end of the negative pressure buffer pump (13) is fixedly connected to the collection box (16).

7. The quick closing valve oil motor control device for a steam turbine according to claim 1, characterized in that: The outer surface of the collecting box (16) is fixedly connected to a connecting valve (17), the outer surface of the internal threaded ring (2) corresponding to the connecting valve (17) is fixedly connected to an entry box (18), and the outer surface of the entry box (18) is provided with a pressure pump (19).

8. The quick closing valve oil motor control device for a steam turbine according to claim 1, characterized in that: A lower support ring (20) is welded to the outer surface of the oil outlet pipe (8), and a side fixing plate (21) is welded to the upper surface of the main body shell (1).

9. The quick closing valve oil motor control device for a steam turbine according to claim 1, characterized in that: The outer surface of the main body shell (1) is provided with a reinforcing outer ring (24), the outer surface of the reinforcing outer ring (24) is provided with a lower fixing plate (22), and the outer surface of the lower fixing plate (22) is provided with an auxiliary clamping plate (23).

10. The quick closing valve oil motor control device for a steam turbine according to claim 1, characterized in that: An upper reinforcement block (25) is provided on the middle upper surface of the main body shell (1), and an upper fixing plate (26) is welded to the outer surface of the upper reinforcement block (25).

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