An operating mechanism of a steam turbine turning gear, steam turbine turning gear

Abstract

The utility model provides a kind of operating mechanism of steam turbine turning gear and steam turbine turning gear, the operating mechanism includes operating lever, positioning pin, unlocking actuator and towline, the positioning pin is used to lock the operating lever;The unlocking actuator is fixed on the operating lever, and its execution end is equipped with towline;The other end of the towline is connected with the positioning pin, and the operating lever can be unlocked by the unlocking actuator driving.The utility model utilizes the operating mechanism of unlocking actuator, towline, operating lever and positioning pin etc., realizes the action of "pulling pin-rotating lever" by one hand of single person, and the rotation action of motor hand wheel is carried out by the other hand, to provide feasible scheme for the single-person operation of turning gear fast and safely.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine technology, and in particular to an operating mechanism and a steam turbine turning gear device. Background Technology

[0002] Before starting or after shutting down a steam turbine, the rotor needs to be rotated slowly for a period of time using a turning gear to ensure equipment safety and operational safety.

[0003] The widely used screw shaft type turning gear requires a multi-step manual engagement process before operation: first, the locking pin of the operating lever is pulled out; then, the operating lever is rotated to the pre-engagement position; finally, the handwheel on the turning motor is operated to engage the gears. This process has significant drawbacks: because the operating lever and the handwheel of the turning motor are spatially separated, and the pulling out of the pin and the rotation of the lever must be synchronized (due to the pin return spring on the locking pin), at least two operators are required. This not only reduces work efficiency and increases labor costs, but also easily leads to improper operation when a single person attempts to operate it, posing risks to equipment and personal safety.

[0004] Therefore, there is an urgent need for an improved solution to enable fast and safe single-person operation of the turning gear. Utility Model Content

[0005] The purpose of this utility model is to provide an operating mechanism and a turbine turning gear device to solve the problems mentioned above.

[0006] The technical solution adopted by this utility model is: an operating mechanism for a turbine turning gear, comprising:

[0007] Control lever;

[0008] A positioning pin, used to lock the operating lever;

[0009] An unlocking actuator is fixed to the operating lever, and its actuating end is provided with a traction line;

[0010] Wherein: the other end of the traction line is connected to the positioning pin, and can be driven by the unlocking actuator to unlock the operating lever.

[0011] Furthermore, the positioning pin slides through the operating rod, and its axis is perpendicular to the axis of the operating rod; the operating rod is provided with a guide assembly, the traction line is wound around the guide assembly, and one end of the traction line connected to the positioning pin is parallel to the axis of the positioning pin.

[0012] Furthermore, the guiding assembly includes at least a first guide wheel and a second guide wheel, with the second guide wheel located between the first guide wheel and the unlocking actuator; the traction line is sequentially wound around the first guide wheel and the second guide wheel, with the first guide wheel located between the operating lever and the traction line, and the traction line located between the operating lever and the second guide wheel.

[0013] Furthermore, the distance between the actuator end of the unlocking actuator and the operating lever is greater than the distance between the second guide wheel and the operating lever.

[0014] Furthermore, the distance between the first guide wheel and the operating lever is greater than the distance between the second guide wheel and the operating lever.

[0015] Furthermore, the operating lever is provided with a first wheel seat and a second wheel seat, the first guide wheel is rotatably disposed at the bottom of the first wheel seat, the second guide wheel is rotatably disposed at the side end of the second wheel seat, the first wheel seat is provided with a first through hole, and the traction line passes through the first through hole.

[0016] Furthermore, the unlocking actuator includes:

[0017] A fixed base is provided on the side wall of the operating lever;

[0018] A rotating handle, which is connected to the fixed base via a second rotating shaft, the second rotating shaft being perpendicular to the operating lever;

[0019] A handle return spring is provided on the side wall of the operating lever, and its other end is connected to the rotating handle;

[0020] Wherein: the fixed seat is located between the handle return spring and the guide assembly, the fixed seat is provided with a second through hole, the traction line passes through the second through hole and connects the rotating handle and the guide assembly respectively.

[0021] Furthermore, the rotating handle is an arc-shaped handle with its convex side facing the operating rod and a linkage block provided on its concave side; the second rotating shaft is located between the linkage block and the second through hole, and one end of the traction line is connected to the linkage block.

[0022] The technical solution of this utility model also includes: a turbine turning gear device, which includes a gearbox, a turning motor, a motor handwheel and the above-mentioned operating mechanism. The motor handwheel is connected to the gearbox through the transmission shaft of the turning motor, and the operating lever is connected to the gearbox through a first rotating shaft. The gearbox is provided with a positioning groove, and the positioning pin is detachably connected to the positioning groove to restrict the rotation of the operating lever around the first rotating shaft.

[0023] The beneficial effects of this utility model are: by using an operating mechanism composed of an unlocking actuator, a traction line, an operating lever, and a positioning pin, a single person can perform the "pulling pin-turning lever" action with one hand and the rotation action of the motor handwheel with the other hand, providing a feasible solution for fast and safe single-person operation of the turning device. Attached Figure Description

[0024] Figure 1 This is a front view of an embodiment of the present invention in its first state;

[0025] Figure 2 This is a side view of an embodiment of the present invention in its first state;

[0026] Figure 3 This is a front view of another embodiment of the present invention;

[0027] Figure 4 This is a side view of an embodiment of the present invention in another state;

[0028] Figure 5 This is a schematic diagram of the unlocking actuator in an embodiment of this utility model.

[0029] In the picture:

[0030] 1. Gearbox; 1.1. Positioning groove;

[0031] 2. Rotary turning motor;

[0032] 3. Motor handwheel;

[0033] 4. Control lever;

[0034] 5. Positioning pin;

[0035] 6. First rotating shaft;

[0036] 7. Unlocking actuator; 7.1. Fixing base; 7.11. Second through hole; 7.2. Rotating handle; 7.3. Second rotating shaft; 7.4. Handle return spring; 7.5. Linkage block;

[0037] 8. Traction line;

[0038] 9. Guide assembly; 9.1. First guide wheel; 9.2. Second guide wheel;

[0039] 10. First wheel seat; 10.1. First perforation;

[0040] 11. Second wheel seat. Detailed Implementation

[0041] The technical solutions of the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0042] In the description of the embodiments of this utility model, it should be understood that the terms "top," "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, it should be noted that unless otherwise expressly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model through specific circumstances.

[0043] Reference Appendix Figure 1-5 This utility model provides an operating mechanism for a turbine turning gear, and a turbine turning gear equipped with such an operating mechanism. Through the addition of components such as the unlocking actuator 7 and the traction line 8, the turning gear can be operated quickly and safely by a single person.

[0044] To clearly and concisely introduce the technical solution of this utility model, this embodiment takes a steam turbine turning gear equipped with the above-mentioned operating mechanism as an example to comprehensively introduce the structure and connection relationship of the two.

[0045] Similar to existing technologies, the turbine turning gear device provided in this embodiment is equipped with a gearbox 1, a turning gear motor 2, a motor handwheel 3, an operating lever 4, a positioning pin 5, and a pin return spring (existing technology, not shown in the attached drawings). The gearbox 1 contains a turbine gear, a turning gear, and a gear-aligning assembly (existing technology, not shown in the attached drawings). The turning gear motor 2, the motor handwheel 3, the operating lever 4, and the positioning pin 5 are all located on the outside of the gearbox 1. The driving shafts of the turning gear, the turning gear motor 2, and the motor handwheel 3 are coaxially connected in sequence. The operating lever 4 is connected to the gear-aligning assembly through a first rotating shaft 6 that passes through the housing of the gearbox 1. The gear-aligning assembly is connected to the turning gear. The housing of the gearbox 1 is provided with a positioning groove 1.1. The positioning pin 5 slides through the operating lever 4 and is inserted into the positioning groove 1.1 to restrict the rotation of the operating lever 4 around the first rotating shaft 6. The pin return spring connects the positioning pin 5 and the operating lever 4 to ensure that the positioning pin 5 is automatically inserted into the positioning groove 1.1 when no force is applied.

[0046] When a turning operation is required, the positioning pin 5 is pulled out of the positioning slot 1.1, allowing the operating lever 4 to rotate around the first rotating shaft 6. At the same time, the operating lever 4 is rotated to drive the gear-aligning assembly, thereby moving the turning gear laterally to the pre-meshing position. Then, the motor handwheel 3 is rotated to adjust the turning gear and the turbine gear to a state where one tooth corresponds to the other tooth groove. Then, the operating lever 4 is rotated again until the turning gear and the turbine gear are stably meshed. Finally, the turning motor 2 is started.

[0047] Unlike existing technologies, the reference appendix Figure 1-4 The turbine turning gear provided in this embodiment is also equipped with an unlocking actuator 7 and a traction line 8. The unlocking actuator 7 is fixed to the operating lever 4, and its actuating end is connected to the traction line 8; the other end of the traction line 8 is connected to the positioning pin 5. As mentioned above, the positioning pin 5 is used to lock the operating lever 4, and the unlocking actuator 7 is used to pull the traction line 8 to pull the positioning pin 5 out of the positioning groove 1.1, thereby unlocking the operating lever 4 and enabling the operating lever 4 to rotate around the first rotating shaft 6.

[0048] Using the operating mechanism composed of the aforementioned operating lever 4, positioning pin 5, unlocking actuator 7, and traction line 8, a single person can perform the "pulling pin-turning lever" action with one hand and the rotation action of the motor handwheel 3 with the other hand, providing a feasible solution for fast and safe single-person operation of the turning device.

[0049] In existing turbine turning gears, both the positioning pin 5 and the first rotating shaft 6 are arranged laterally, and their axes extend in the same direction; the axis of the operating lever 4 is perpendicular to the axis of the positioning pin 5. To ensure the smooth linkage between the unlocking actuator 7 and the traction line 8 in pulling the positioning pin 5, a guide assembly 9 is provided on the operating lever 4 in this embodiment. The traction line 8 is wound around the guide assembly 9, so that one end of the traction line 8 connected to the positioning pin 5 is parallel to the axis of the positioning pin 5.

[0050] For details, please refer to the appendix. Figure 1 and 3 The guide assembly 9 includes a first guide wheel 9.1 and a second guide wheel 9.2. The operating lever 4 is provided with a first wheel seat 10 and a second wheel seat 11. The second wheel seat 11 is located between the first wheel seat 10 and the unlocking actuator 7. The first guide wheel 9.1 is rotatably mounted on the first wheel seat 10, and the second guide wheel 9.2 is rotatably mounted on the second wheel seat 11. The traction line 8 is sequentially wound around the first guide wheel 9.1 and the second guide wheel 9.2. The first guide wheel 9.1 is located between the operating lever 4 and the traction line 8 (referring to the part where the traction line 8 is connected to the first guide wheel 9.1), and the traction line 8 (referring to the part where the traction line 8 is connected to the second guide wheel 9.2) is located between the operating lever 4 and the second guide wheel 9.2.

[0051] In the above configuration scheme, by pre-designing the height of the first guide wheel 9.1 and the height of the connection point between the traction line 8 and the positioning pin 5, it can be ensured that: the section of traction line 8 connecting the positioning pin 5 and the first guide wheel 9.1 is parallel to the axis of the positioning pin 5; through the above-mentioned winding scheme of the traction line 8 on the first guide wheel 9.1 and the second guide wheel 9.2, and the pulling action of the unlocking actuator 7, it can be ensured that: throughout the entire process of pulling out the positioning pin 5, the section of traction line 8 connecting the positioning pin 5 and the first guide wheel 9.1 is parallel to the axis of the positioning pin 5, thereby ensuring the smoothness of the linkage between the unlocking actuator 7 and the traction line 8 in pulling out the positioning pin 5.

[0052] As a preferred example, in this embodiment: the first guide wheel 9.1 is rotatably disposed at the bottom of the first wheel seat 10, and the second guide wheel 9.2 is rotatably disposed at the side end of the second wheel seat 11. The first wheel seat 10 is provided with a first through hole 10.1, and the traction line 8 passes through the first through hole 10.1 and connects the first guide wheel 9.1 and the second guide wheel 9.2 respectively; and: the distance between the first guide wheel 9.1 and the operating rod 4 is greater than the distance between the second guide wheel 9.2 and the operating rod 4, and the distance between the actuator end of the unlocking actuator 7 and the operating rod 4 is greater than the distance between the second guide wheel 9.2 and the operating rod 4.

[0053] Reference Appendix Figure 5 The unlocking actuator 7 includes a fixed base 7.1, a rotating handle 7.2, a second rotating shaft 7.3, and a handle return spring 7.4. The fixed base 7.1 is located on the side wall of the operating lever 4. The rotating handle 7.2 is connected to the fixed base 7.1 through the second rotating shaft 7.3, and the axis of the second rotating shaft 7.3 is perpendicular to the axis of the operating lever 4. The handle return spring 7.4 is located on the side wall of the operating lever 4, and its other end is connected to the rotating handle 7.2. Furthermore, the fixed base 7.1 is located between the handle return spring 7.4 and the second guide wheel 9.2. The fixed base 7.1 has a second through hole 7.11, through which the traction line 8 passes and connects the rotating handle 7.2 and the guide assembly 9, respectively.

[0054] When a turning operation is required, squeezing the rotating handle 7.2 and the operating lever 4 (at this time, the handle return spring 7.4 is compressed) can pull the traction line 8, thereby causing the positioning pin 5 to move laterally and be pulled out of the positioning groove 1.1. This gives the operating lever 4 the freedom to rotate around the first rotating shaft 6. At the same time, the hand squeezing the rotating handle 7.2 and the operating lever 4 can also push and rotate the operating lever 4, realizing a one-handed "pin-pulling and lever-turning" operation. When the turning operation is finished and the turning motor 2 stops running, the above process can be reversed until the positioning pin 5 returns to the state corresponding to the positioning groove 1.1. Then, the rotating handle 7.2 is released, and under the action of the handle return spring 7.4 and the pin return spring, the traction line 8 is released, allowing the positioning pin 5 to be inserted back into the positioning groove 1.1.

[0055] As an example, see Appendix Figure 5In this embodiment, the rotating handle 7.2 is an arc-shaped handle with its convex side facing the operating rod 4 and a linkage block 7.5 provided on its concave side; the second rotating shaft 7.3 is located between the linkage block 7.5 and the second through hole 7.11, and one end of the traction line 8 is connected to the linkage block 7.5.

[0056] In the above technical solution, the connection method between the two ends of the traction rope and the linkage block 7.5 and the positioning pin 5 can be: direct binding, or connection through hooks, hanging rings, perforated binding joints, etc., and the specific implementation method is not limited.

[0057] It is worth noting that the purpose of this technical solution is to improve the external structure of gearbox 1 to solve the problems of low efficiency and high labor costs caused by the current "pin pulling, lever turning, and handwheel turning" operation requiring multiple people to cooperate, or the potential for equipment or personnel safety accidents when a single person attempts to operate it. Therefore, apart from the above, the other internal structures and operating principles of the existing turbine turning gear (especially gearbox 1) are all existing technologies and will not be described in detail.

[0058] Compared with the prior art, the beneficial effects of this utility model include at least the following: by using an operating mechanism composed of an unlocking actuator, a traction line, an operating lever, and a positioning pin, a single person can perform the "pulling pin-turning lever" action with one hand and the rotation action of the motor handwheel with the other hand, providing a feasible solution for fast and safe single-person operation of the turning device.

[0059] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An operating mechanism for a turbine turning gear, characterized in that, include: Control lever; A positioning pin, used to lock the operating lever; An unlocking actuator is fixed to the operating lever, and its actuating end is provided with a traction line; Wherein: the other end of the traction line is connected to the positioning pin, and can be driven by the unlocking actuator to unlock the operating lever.

2. The operating mechanism of the turbine turning gear according to claim 1, characterized in that, The positioning pin slides through the operating rod, and its axis is perpendicular to the axis of the operating rod; the operating rod is provided with a guide assembly, the traction line is wound around the guide assembly, and one end of the traction line connected to the positioning pin is parallel to the axis of the positioning pin.

3. The operating mechanism of the turbine turning gear according to claim 2, characterized in that, The guiding assembly includes at least a first guide wheel and a second guide wheel, with the second guide wheel located between the first guide wheel and the unlocking actuator; the traction line is sequentially wound around the first guide wheel and the second guide wheel, with the first guide wheel located between the operating lever and the traction line, and the traction line located between the operating lever and the second guide wheel.

4. The operating mechanism of the turbine turning gear according to claim 3, characterized in that, The distance between the actuator end of the unlocking actuator and the operating lever is greater than the distance between the second guide wheel and the operating lever.

5. The operating mechanism of the turbine turning gear according to claim 3 or 4, characterized in that, The distance between the first guide wheel and the operating lever is greater than the distance between the second guide wheel and the operating lever.

6. The operating mechanism of the turbine turning gear according to claim 5, characterized in that, The operating lever is provided with a first wheel seat and a second wheel seat. The first guide wheel is rotatably disposed at the bottom of the first wheel seat, and the second guide wheel is rotatably disposed at the side end of the second wheel seat. The first wheel seat is provided with a first through hole, and the traction line passes through the first through hole.

7. The operating mechanism of the turbine turning gear according to any one of claims 2-4 and 6, characterized in that, The unlocking actuator includes: A fixed base is provided on the side wall of the operating lever; A rotating handle, which is connected to the fixed base via a second rotating shaft, the second rotating shaft being perpendicular to the operating lever; A handle return spring is provided on the side wall of the operating lever, and its other end is connected to the rotating handle; Wherein: the fixed seat is located between the handle return spring and the guide assembly, the fixed seat is provided with a second through hole, the traction line passes through the second through hole and connects the rotating handle and the guide assembly respectively.

8. The operating mechanism of the turbine turning gear according to claim 7, characterized in that, The rotating handle is an arc-shaped handle with its convex side facing the operating rod and a linkage block provided on its concave side; the second rotating shaft is located between the linkage block and the second through hole, and one end of the traction line is connected to the linkage block.

9. A turbine turning gear device, characterized in that, The device includes a gearbox, a turning gear motor, a motor handwheel, and an operating mechanism for the turbine turning gear according to any one of claims 1-8. The motor handwheel is connected to the gearbox via the drive shaft of the turning gear motor, and the operating lever is connected to the gearbox via a first rotating shaft. The gearbox is provided with a positioning groove, and a positioning pin is detachably connected to the positioning groove to restrict the rotation of the operating lever around the first rotating shaft.

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