Water spraying cooling mechanism of three-cylinder three-steam-exhaust full-back-pressure unit
By designing an adjustable three-cylinder, three-emission steam full backpressure unit water spray cooling mechanism, the impact on the steam seal during the water spray cooling process is solved, and more efficient cooling effect and more stable unit operation is achieved. .
Patent Information
- Application Number
- CN202420408546.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-04
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-03-04
AI Technical Summary
During the operation of the three-cylinder and three-emission steam full backpressure unit, when the temperature of the low-pressure exhaust cylinder is too high, the water spray may be directly brought into the exhaust cylinder during the cooling process or be thrown out by the high-speed rotating blades, resulting in a severe steam seal. The cooling is reduced and deformation occurs, which in turn causes vibration of the bearings on both sides of the medium-pressure rotor.
A three-cylinder, three-emission steam full backpressure unit water spray cooling mechanism is designed. Through the AGV automatic guide vehicle, installation disc, rotating mechanism and multiple connecting arms, combined with clamping mechanism and hose, the height of the cooling water pipe and Distance adjustment ensures that the water spray cooling effect is also reduced while reducing the impact on the steam seal.
By adjusting the position of the water spray cooling mechanism, the cooling effect of the low-pressure exhaust cylinder is improved, and the impact on the steam seal is reduced, thereby improving the operating efficiency of the three-cylinder and three-exhaust steam full backpressure unit.
Smart Images
Figure CN222504651U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of steam turbine cooling test equipment, in particular to a water spray cooling mechanism for a three-cylinder three-exhaust full back pressure unit. Background Art
[0002] The three-cylinder three-exhaust full back-pressure unit is a steam turbine back-pressure generator set with three cylinders and three levels. When the steam turbine is working, the steam is cooled on the blades. The steam after three-stage cooling is combined with the low-pressure cylinder group through the rear exhaust steam, so that the steam turbine can make fuller use of the energy of the steam and improve the power generation efficiency.
[0003] During the operation of the three-cylinder, three-exhaust full back-pressure unit, when the temperature of the low-pressure exhaust cylinder is too high, it is necessary to add cooling water to cool the low-pressure cylinder. During the water spray cooling process, the nozzle sprays water in the direction of the low-pressure blades. When the unit rotates, the water is directly brought into the exhaust cylinder due to the large flow of low-pressure exhaust steam, or sprayed to the blades and thrown out into the exhaust cylinder by the high-speed rotating blades. If the nozzle is close to the steam seal body, the water spray from the nozzle directly flushes the steam seal body, which is prone to severe deformation after the steam seal body suddenly cools down, thereby causing vibration of the bearings on both sides of the medium-pressure rotor.
[0004] The position of the nozzle needs to be tested and positioned multiple times to ensure that the nozzle can achieve a good cooling effect when spraying water for cooling, and will not affect the steam seal body.
[0005] Therefore, the present application proposes a water spray cooling mechanism for a three-cylinder, three-exhaust, full back-pressure unit that can adjust the nozzle position, improve the nozzle water spray cooling effect, and will not affect the steam seal body. Utility Model Content
[0006] The purpose of the development of the utility model is to solve the above technical problems. A brief overview of the utility model is given below to provide a basic understanding of certain aspects of the utility model. It should be understood that this overview is not an exhaustive overview of the utility model. It is not intended to determine the key or important parts of the utility model, nor is it intended to limit the scope of the utility model.
[0007] The technical solution of this utility model:
[0008] A water spray cooling mechanism for a three-cylinder, three-exhaust, full back pressure unit comprises an AGV automatic guided vehicle, a mounting plate, a rotating mechanism, a first connecting arm, a second connecting arm, a third connecting arm, a clamping mechanism, a cooling water pipe and a hose. The mounting plate is fixedly mounted on the AGV automatic guided vehicle, the rotating mechanism is arranged on the mounting plate, the rotating mechanism is hinged to the first connecting arm, the first connecting arm, the second connecting arm and the third connecting arm are hinged in sequence, the third connecting arm is mounted with a clamping mechanism, the clamping end of the clamping mechanism is connected to the cooling water pipe, and the input end of the cooling water pipe is connected to the hose.
[0009] Furthermore, the rotating mechanism includes a first motor, a first driving gear, a first driven gear, a rotating shaft, a first driving mechanism and a first lever. The first motor is fixed to the mounting plate through a motor mounting seat. The execution end of the first motor is connected to the first driving gear. The first driving gear is meshed with the first driven gear. The first driven gear is mounted on the rotating shaft. The rotating shaft is rotatably mounted on the mounting plate. The first driving mechanism is installed on the rotating shaft. The execution end of the first driving mechanism is connected to the first connecting arm through the first lever.
[0010] Furthermore, a second driving mechanism is installed on the first connecting arm, and an execution end of the second driving mechanism is connected to the second connecting arm via a second shifting rod.
[0011] Furthermore, a third driving mechanism is installed on the second connecting arm, and an execution end of the third driving mechanism is connected to the third connecting arm via a third lever.
[0012] Furthermore, a fourth driving mechanism is installed on the third connecting arm, the execution end of the fourth driving mechanism is connected to the second driving gear, the second driving gear is meshed with the rack, the rack is connected to the connecting rod, and a plurality of articulated rods are arranged in a circular array at the end of the connecting rod, one end of the articulated rod is hinged to the connecting rod, and the other end of the articulated rod is hinged to the clamping claw 74, and the clamping claw is hinged to the end of the third connecting arm.
[0013] Furthermore, a plurality of pipe clamps are provided on the inner side walls of the first connecting arm and the second connecting arm, and the pipe clamps are connected with the hose, and the hose passes through the pipe clamps of the first connecting arm and the second connecting arm and the rotating shaft arrangement in sequence.
[0014] The utility model has the following beneficial effects:
[0015] The utility model discloses a water spray cooling mechanism for a three-cylinder, three-exhaust, full back-pressure unit, which can clamp the cooling water pipe through a clamping mechanism, and adjust the height of the output end of the cooling water pipe and the distance between the output end and the steam seal body under the action of a connecting arm with multiple degrees of freedom and a rotating mechanism, thereby verifying the cooling effect of the nozzle water spray cooling on the low-pressure exhaust cylinder and reducing the influence on the steam seal body, thereby improving the operating efficiency of the full back-pressure unit. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the water spray cooling mechanism of a three-cylinder, three-exhaust, full back pressure unit;
[0017] Figure 2 It is a main cross-sectional view of the water spray cooling mechanism of a three-cylinder, three-exhaust, full back pressure unit;
[0018] Figure 3 It is a schematic diagram of the coordination relationship between the second connecting arm, the third connecting arm and the clamping mechanism.
[0019] In the figure: 1-AGV automatic guided vehicle, 2-mounting plate, 3-rotating mechanism, 4-first connecting arm, 5-second connecting arm, 6-third connecting arm, 7-clamping mechanism, 8-cooling water pipe, 9-hose, 10-pipe clamp, 31-first motor, 32-first driving gear, 33-first driven gear, 34-rotating shaft, 35-first driving mechanism, 36-first lever, 41-second driving mechanism, 42-second lever, 51-third driving mechanism, 52-third lever, 61-fourth driving mechanism, 62-second driving gear, 71-rack, 72-connecting rod, 73-articulated rod, 74-clamping claw. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below by specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.
[0021] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection (i.e., non-detachable connection) includes but is not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection, and welding connection. The detachable connection includes but is not limited to conventional detachable methods such as threaded connection, snap connection, pin connection, and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: welding connection is selected for fixed connection, and hinge connection is selected for detachable connection.
[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0023] Embodiment 1, combination Figure 1-Figure 3 To illustrate this embodiment, a water spray cooling mechanism of a three-cylinder, three-exhaust, full back pressure unit of this embodiment includes an AGV automatic guided vehicle 1, a mounting plate 2, a rotating mechanism 3, a first connecting arm 4, a second connecting arm 5, a third connecting arm 6, a clamping mechanism 7, a cooling water pipe 8 and a hose 9. The mounting plate 2 is fixedly mounted on the AGV automatic guided vehicle 1, the rotating mechanism 3 is arranged on the mounting plate 2, the rotating mechanism 3 is hinged to the first connecting arm 4, the first connecting arm 4, the second connecting arm 5 and the third connecting arm 6 are hinged in sequence, and the third connecting arm 6 is installed with a clamping mechanism 7, the clamping end of the clamping mechanism 7 is connected to the cooling water pipe 8, and the input end of the cooling water pipe 8 is connected to the hose 9.
[0024] The AGV automatic guided vehicle facilitates the movement of the water spray cooling mechanism as a whole. The first motor 31 is installed on the mounting plate 2 through the motor mounting seat. The first motor 31 starts 2 to drive the first driving gear 32 to rotate, and the first driving gear 32 drives the first driven gear 32 to rotate, thereby driving the rotating shaft 34 to rotate, and then controlling the cooling water pipe 8 clamped by the clamping mechanism 7 to rotate;
[0025] The first drive mechanism 35, the second drive mechanism 41, the third drive mechanism 51 and the fourth drive mechanism 61 have the same structure and are all a combination of a motor and a motor mounting seat. The first drive mechanism 35 is a motor installed on the side wall of the rotating shaft 35 through the motor mounting seat, and the execution end of the motor is connected to the first connecting arm 4 through the first lever 36, and the motor drives the first connecting arm 4 to swing up and down. The second drive mechanism 41 is a motor installed on the first connecting arm 4 through the motor mounting seat, and the execution end of the motor is connected to the second connecting arm 5 through the second lever 42, and the motor drives Drives the second connecting arm to swing up and down; the third driving mechanism 51 is a motor installed on the second connecting arm 5 through a motor mounting seat, and the executing end of the motor is connected to the third connecting arm 6 through the third lever 52, and the motor drives the third connecting arm 6 to swing up and down; the fourth driving mechanism 61 is a motor installed on the third connecting arm 6 through a motor mounting seat, and the executing end of the motor is connected to the second driving gear 62, and the second driving gear 62 is meshed with the rack 71. When the second driving gear 62 rotates, it drives the rack 71 to move up and down, thereby driving the clamping claw 74 of the clamping mechanism 7 to open or close.
[0026] A fourth driving mechanism 61 is installed on the third connecting arm 6, the execution end of the fourth driving mechanism 61 is connected to the second driving gear 62, the second driving gear 62 is meshed with the rack 71, the rack 71 is connected to the connecting rod 72, and a plurality of articulated rods 73 are arranged in a circular array at the end of the connecting rod 72, one end of the articulated rod 73 is articulated to the connecting rod 72, the other end of the articulated rod 73 is articulated to the clamping claw 74, and the clamping claw 74 is articulated to the end of the third connecting arm 6. Under the action of the hinged rod 73, the rack 71 moves up and down to drive the clamping claw 74 to open or clamp the cooling water pipe 8. Under the action of the clamping mechanism 7, the cooling water pipes 8 of different diameters can be clamped to adjust the water spraying amount of the cooling water pipe 8. The tail end of the cooling water pipe 8 is connected to the hose 9 through the valve body. The hose 9 is fixed by the pipe clamp 10 on the first connecting arm 4 and the second connecting arm 5. The hose 9 passes through the rotating shaft 34, is pulled out from the gap between the mounting plate 2 and the AGV automatic guided vehicle 1, and is connected to the external water cooling, so as to transport low-temperature cooling water to the cooling water pipe 8.
[0027] This embodiment is only an illustrative description of the present application and does not limit its protection scope. Those skilled in the art may also make partial changes thereto, and as long as they do not exceed the spirit of the present application, they are all within the protection scope of the present application.
Claims
1. A water spray cooling mechanism for a three-cylinder, three-exhaust, full back pressure unit, characterized in that: The invention comprises an AGV automatic guided vehicle (1), a mounting plate (2), a rotating mechanism (3), a first connecting arm (4), a second connecting arm (5), a third connecting arm (6), a clamping mechanism (7), a cooling water pipe (8) and a hose (9); the mounting plate (2) is fixedly mounted on the AGV automatic guided vehicle (1); the rotating mechanism (3) is arranged on the mounting plate (2); the rotating mechanism (3) is hinged to the first connecting arm (4); the first connecting arm (4), the second connecting arm (5) and the third connecting arm (6) are hinged in sequence; the third connecting arm (6) is mounted with a clamping mechanism (7); the clamping end of the clamping mechanism (7) is connected to the cooling water pipe (8); and the input end of the cooling water pipe (8) is connected to the hose (9).
2. The water spray cooling mechanism of a three-cylinder, three-exhaust, full back pressure unit according to claim 1 is characterized by: The rotating mechanism (3) comprises a first motor (31), a first driving gear (32), a first driven gear (33), a rotating shaft (34), a first driving mechanism (35) and a first shifting rod (36); the first motor (31) is fixed on the mounting plate (2) via a motor mounting seat; an execution end of the first motor (31) is connected to the first driving gear (32); the first driving gear (32) is meshed with the first driven gear (33); the first driven gear (33) is sleeved on the rotating shaft (34); the rotating shaft (34) is rotatably mounted on the mounting plate (2); a first driving mechanism (35) is mounted on the rotating shaft (34); and an execution end of the first driving mechanism (35) is connected to the first connecting arm (4) via the first shifting rod (36).
3. The water spray cooling mechanism of a three-cylinder, three-exhaust, full back pressure unit according to claim 2 is characterized by: A second driving mechanism (41) is installed on the first connecting arm (4), and an execution end of the second driving mechanism (41) is connected to the second connecting arm (5) via a second shifting rod (42).
4. The water spray cooling mechanism of a three-cylinder, three-exhaust, full back pressure unit according to claim 3 is characterized by: A third driving mechanism (51) is installed on the second connecting arm (5), and an execution end of the third driving mechanism (51) is connected to the third connecting arm (6) via a third shifting rod (52).
5. The water spray cooling mechanism of a three-cylinder, three-exhaust, full back pressure unit according to claim 4 is characterized by: A fourth driving mechanism (61) is installed on the third connecting arm (6); an execution end of the fourth driving mechanism (61) is connected to a second driving gear (62); the second driving gear (62) is meshed with a rack (71); the rack (71) is connected to a connecting rod (72); a plurality of hinged rods (73) are arranged in a circular array at the end of the connecting rod (72); one end of the hinged rod (73) is hinged to the connecting rod (72); the other end of the hinged rod (73) is hinged to a clamping claw (74); and the clamping claw (74) is hinged to the end of the third connecting arm (6).
6. The water spray cooling mechanism of a three-cylinder, three-exhaust, full back pressure unit according to claim 5, characterized in that: A plurality of pipe clamps (10) are arranged on the inner side walls of the first connecting arm (4) and the second connecting arm (5); the pipe clamps (10) are connected to the hose (9); and the hose (9) passes through the pipe clamps (10) of the first connecting arm (4), the second connecting arm (5) and the rotating shaft (34) in sequence.