Anti-falling steam turbine mechanical tripping structure
By incorporating a concave knife-edge and a raised limiting structure into the mechanical tripping structure of the steam turbine, the problem of easy disengagement of the reset linkage was solved, thus achieving stable operation of the steam turbine.
Patent Information
- Application Number
- CN202520504121.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-21
AI Technical Summary
The mechanical tripping structure of a steam turbine is prone to malfunction under slight vibration, leading to steam interruption and shutdown of the unit, causing production fluctuations.
A knife-edge is provided in the groove on the manual release linkage, and symmetrical protrusions are provided on both sides to form a concave structure for limiting and resetting the linkage. Combined with screw fixation, it ensures stable connection.
It effectively prevents the reset linkage and manual release linkage from misalignment and disengagement, avoids malfunctions, and ensures the stable operation of the steam turbine.
Smart Images
Figure CN223923100U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of steam turbine mechanical tripping structure of anti-falling. BACKGROUND
[0002] Steam Turbine is a kind of steam's thermal energy is converted into mechanical energy rotary power equipment, is widely used in power generation, industrial driving etc. Steam turbine mechanical tripping structure as important component of steam turbine, under the abnormal working condition of steam turbine, the quick closing valve at the steam inlet of steam turbine can be quickly closed, to protect steam turbine from being damaged, it plays a vital role in the process of steam turbine safe operation. When steam turbine deviates from normal operating condition, such as operating speed exceeds maximum allowable speed, medium leakage, body vibration anomaly etc., the knife gate above the steam turbine mechanical tripping structure falls down, under the action of impact force, manual tripping connecting rod and reset connecting rod are separated, under the action of spring tension, the quick closing valve at the steam inlet is quickly closed, steam source is cut off, so that steam turbine stops running, realizes the safe parking function of unit, as shown in Fig. Fig. 1 In actual production, reset connecting rod is lapped at the knife edge bank of manual tripping connecting rod, and the lapping area is small, when the lapping orientation deviates, reset connecting rod and manual tripping connecting rod are easily separated automatically under the action of slight vibration, misoperation leads to unit steam stop, and certain production fluctuation is caused. SUMMARY
[0003] This section is directed to outlining some aspects of the embodiments of the present utility model and briefly introducing some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the abstract of the specification and the utility model title to avoid obscuring the purpose of this section, the abstract of the specification and the utility model title, and such simplifications or omissions are not to be construed as limiting the scope of the present utility model.
[0004] The technical problem to be solved by the utility model is how to avoid the problem of abnormal tripping of steam turbine mechanical tripping structure.
[0005] To solve the above technical problem, the utility model provides the following technical scheme: a kind of steam turbine mechanical tripping structure of anti-falling, including manual tripping connecting rod and reset connecting rod, the reset connecting rod is set on the manual tripping connecting rod, recess is opened in the manual tripping connecting rod, and knife edge bank is arranged in the recess, the left and right sides of the top of the knife edge bank are symmetrically provided with protrusion, form concave structure, for anti-falling, the reset connecting rod is lapped on the knife edge bank.
[0006] As a preferred scheme of the anti-falling mechanical trip structure of the steam turbine, the height of the protrusion is 5mm, and the width is 5mm, so that the protrusion plays a certain limiting role on the reset connecting rod, while avoiding excessive limiting of the reset connecting rod, so that the reset connecting rod cannot be normally tripped, thereby achieving the best anti-falling effect.
[0007] As a preferred scheme of the anti-falling mechanical trip structure of the steam turbine, the height of the protrusion is 5mm, and the width is 5mm, so that the protrusion plays a certain limiting role on the reset connecting rod, while avoiding excessive limiting of the reset connecting rod, so that the reset connecting rod cannot be normally tripped, thereby achieving the best anti-falling effect.
[0008] As a preferred scheme of the anti-falling mechanical trip structure of the steam turbine, the height of the protrusion is 5mm, and the width is 5mm, so that the protrusion plays a certain limiting role on the reset connecting rod, while avoiding excessive limiting of the reset connecting rod, so that the reset connecting rod cannot be normally tripped, thereby achieving the best anti-falling effect.
[0009] As a preferred scheme of the anti-falling mechanical trip structure of the steam turbine, the height of the protrusion is 5mm, and the width is 5mm, so that the protrusion plays a certain limiting role on the reset connecting rod, while avoiding excessive limiting of the reset connecting rod, so that the reset connecting rod cannot be normally tripped, thereby achieving the best anti-falling effect.
[0010] Advantages:
[0011] 1. The protrusions are symmetrically arranged on the left and right sides of the top of the knife edge bank, so that the entire knife edge bank has a concave structure, which limits the reset connecting rod, thereby avoiding abnormal tripping of the mechanical trip structure of the steam turbine due to misoperation;
[0012] 2. The structure is mainly improved based on the original structure by improving the overall structure of the knife edge bank to limit the reset connecting rod, which is simple to manufacture and low in cost, so as to be popularized and applied. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor. Among them:
[0014] Fig. 1 It is the overall structure diagram of the existing mechanical trip structure of the steam turbine.
[0015] Fig. 2 The whole structure diagram of the anti-falling mechanical tripping structure of the steam turbine.
[0016] Fig. 3 The explosion diagram of the manual tripping connecting rod, the knife edge bank and the inner hexagonal cylindrical head screw in the anti-falling mechanical tripping structure of the steam turbine.
[0017] Fig. 4 The position structure diagram of the knife edge bank after installation of the anti-falling mechanical tripping structure of the steam turbine.
[0018] Fig. 5 The position structure diagram of the protrusion after installation of the anti-falling mechanical tripping structure of the steam turbine.
[0019] In the figure: 1, the manual tripping connecting rod; 2, the reset connecting rod; 3, the groove; 4, the knife edge bank; 5, the protrusion; 6, the countersunk through hole; 7, the inner hexagonal cylindrical head screw; 8, the threaded hole. DETAILED DESCRIPTION
[0020] In order to make the above objects, features and advantages of the present application more apparent and understandable, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0021] In the following description, a lot of specific details are set forth in order to give a thorough understanding of the present application, but the present application can be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0022] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or mutually exclusive of other embodiments.
[0023] EMBODIMENT
[0024] REFERENCE Figs. 1-5 The embodiment provides an anti-falling mechanical tripping structure of a steam turbine, which comprises a manual tripping connecting rod 1 and a reset connecting rod 2, the reset connecting rod 2 is arranged on the manual tripping connecting rod 1, specifically, a groove 3 is formed in the manual tripping connecting rod 1, a knife edge bank 4 is arranged in the groove 3, protrusions 5 are symmetrically arranged on the left and right sides of the top of the knife edge bank 4, forming a concave structure, which is used for anti-falling, and the reset connecting rod 2 is overlapped on the knife edge bank 4.
[0025] The reset link 2 in the mechanical tripping mechanism of the steam turbine is generally overlapped on the top of the knife edge bank 4 of the manual tripping link 1. Since the overlapping area of the knife edge bank 4 is small, and the two sides of the knife edge bank 4 are not limited, when the overlapping position between the reset link 2 and the knife edge bank 4 deviates, the reset link 2 and the manual tripping link 1 are easily separated automatically under the action of slight vibration, which causes the unit to stop running and causes certain production fluctuation. The recess 3 is formed in the manual tripping link 1, the knife edge bank 4 is installed in the recess 3, the left and right sides of the top of the knife edge bank 4 are symmetrically provided with the protrusions 5, which can limit the reset link 2 and prevent the reset link 2 from being overlapped with the manual tripping link 1 in the wrong position, improve the overlapping quality, and the protrusions 5 and the knife edge bank 4 are an integral structure, so that the whole knife edge bank 4 is concave, which is simple in manufacturing and low in cost, and is easy to popularize and apply. The reset link 2 is pulled up and overlapped between the left and right protrusions 5 of the knife edge bank 4 during work, so as to limit the reset link 2 and prevent the reset link 2 from being overlapped in the wrong position, thereby avoiding the separation of the manual tripping link 1 and the reset link 2 caused by slight vibration of the mechanical tripping structure of the steam turbine, which causes the unit to stop running. It should be noted that the size of the knife edge bank 4 in the embodiment can be determined according to the specific size of the reset link 2.
[0026] Further, the height of the protrusion 5 is 5mm, and the width is 5mm.
[0027] The height of the protrusion 5 is designed to be 5mm, and the width is designed to be 5mm, so that the protrusion 5 can limit the reset link 2 to a certain extent, and also avoid excessive limitation of the reset link 2, so that the reset link 2 cannot fall normally, thereby achieving the best anti-falling effect.
[0028] Further, the height of the manual tripping link 1 is 300mm, and the distance between the inner concave bottom surface of the knife edge bank 4 and the bottom of the manual tripping link 1 is 213mm.
[0029] The height of the manual tripping link 1 is designed to be 300mm, and the distance between the inner concave bottom surface of the knife edge bank 4 and the bottom of the manual tripping link 1 is designed to be 213mm, so that the knife edge bank 4 can better cooperate with the reset link 2 and improve the overlapping quality, thereby achieving the best anti-falling effect. In other embodiments, the height of the manual tripping link 1 and the distance between the knife edge bank 4 and the bottom of the manual tripping link 1 can also be other values, which can be determined according to actual use requirements.
[0030] Further, the sink hole through hole 6 is formed in the knife edge bank 4, the M5x12 inner hexagonal cylindrical head screw 7 is arranged in the sink hole through hole 6, and the screw hole 8 matched with the inner hexagonal cylindrical head screw 7 is formed in the bottom of the recess 3.
[0031] The embodiment is characterized in that the through hole 6 is provided on the knife edge 4, the M5*12 inner hexagonal head screw 7 is installed in the through hole 6, the thread hole 8 matched with the inner hexagonal head screw 7 is provided at the bottom of the groove 3, and the M5*12 inner hexagonal head screw 7 is screwed into the corresponding thread hole 8 at the bottom of the groove 3 on the manual tripping connecting rod 1 through the through hole 6 on the knife edge 4 during installation, so that the knife edge 4 is firmly fixed on the manual tripping connecting rod 1, and the loosening of the knife edge 4 during work is avoided, and the normal work of the steam turbine is affected.
[0032] Further, the interval between the two protrusions 5 is 22mm.
[0033] The embodiment is characterized in that the interval between the two protrusions 5 on the left and right sides of the knife edge 4 is designed as 22mm, so that the reset connecting rod 2 can be easily lifted and lowered, and the best anti-falling effect is achieved, and in other embodiments, the interval between the two protrusions 5 on the left and right sides of the knife edge 4 can also be other values, and the actual demand can be determined to ensure that the reset connecting rod 2 can be easily lifted and lowered.
[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model and are not limited, and although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the utility model, and all should be covered in the scope of the claims of the utility model.
Claims
1. A non-falling mechanical trip structure of a steam turbine, comprising a manual trip link (1) and a reset link (2) arranged on the manual trip link (1), characterized in that: The manual tripping link (1) is provided with a groove (3), the groove (3) is provided with a knife edge bank (4), the left and right sides of the top of the knife edge bank (4) are symmetrically provided with protrusions (5), forming a concave structure, for preventing falling off, and the reset link (2) is overlapped on the knife edge bank (4).
2. The anti-unseating steam turbine mechanical trip structure of claim 1, wherein: The height of the protrusion (5) is 5mm, and the width is 5mm.
3. The anti-unseating steam turbine mechanical trip structure of claim 2, wherein: The height of the manual tripping link (1) is 300mm, and the distance between the inner concave bottom surface of the knife edge bank (4) and the bottom of the manual tripping link (1) is 213mm.
4. The anti-unseating steam turbine mechanical trip structure of claim 3, wherein: The knife edge bank (4) is provided with a countersunk hole (6), the countersunk hole (6) is provided with an M5x12 inner hexagonal cylindrical head screw (7), and the bottom of the groove (3) is provided with a threaded hole (8) matched with the inner hexagonal cylindrical head screw (7).
5. The anti-unseating steam turbine mechanical trip structure of claim 2, wherein: The distance between the two protrusions (5) is 22mm.