CN-224228775-U - Ectopic link pin device is prevented to hydraulic turbine

Abstract

The utility model relates to the technical field of connecting plate pins, and particularly discloses an anti-ectopic connecting plate pin device of a water turbine, which comprises a connecting plate pin body, wherein a threaded hole is formed in the center of the bottom of the connecting plate pin body, a bolt is arranged in the threaded hole, the head of the bolt is fixedly connected with a gasket, and the diameter of the gasket is larger than that of the thin end of the connecting plate pin body; the utility model effectively restricts the axial displacement of the connecting plate pin by additionally arranging the adjustable mechanical limiting device at the bottom of the connecting plate pin, has simple structure and no need of changing the main body structure of the original water guide mechanism, and the diameter of the gasket and the screwing depth of the bolt can be adjusted according to the need, so as to adapt to the connection requirements of control rings and crank arms with different thicknesses.

Inventors

• Pan Shugai
• ZHAO SONGNAN
• ZHENG XIN
• WANG ZHE
• SUN ZHIQIANG
• ZHANG YUEN
• MA NAN
• HAN SHICHENG
• LI YUMING
• Pan Fangzheng
• CHENG TAO
• LIU ZHE
• WANG FENG
• QI XUEFENG
• LIU YINGHAO

Assignees

• 河南西沟电力有限责任公司

Dates

Publication Date

20260512

Application Date

20250611

Claims (7)

1. 1. An anti-ectopic connecting plate pin device of a water turbine, which is characterized by comprising: the connecting plate pin comprises a connecting plate pin body (1), wherein a threaded hole (2) is formed in the center of the bottom of the connecting plate pin body (1), a bolt (3) is installed in the threaded hole (2), a gasket (4) is fixedly connected to the head of the bolt (3), and the diameter of the gasket (4) is larger than the diameter of the thin end of the connecting plate pin body (1); The spacer (4) and the bottom end of the connecting plate pin body (1) are provided with a preset interval for limiting the connecting plate pin body (1) to be lifted upwards in the action process of the water guide mechanism.
2. 2. The hydraulic turbine anti-ectopic link pin device of claim 1, wherein the screw thread specification of the bolt (3) is matched with the screw hole (2), and the screwing depth of the bolt (3) is adjustable.
3. 3. The anti-ectopic connecting plate pin device of the water turbine is characterized in that the gasket (4) is made of one of stainless steel or carbon steel, and the thickness is 3-5mm.
4. 4. An anti-ectopic joint pin device of a water turbine as claimed in claim 1, wherein the outer diameter of the thin end of the joint pin body (1) is 28-32mm, and the diameter of the gasket (4) is 5-8mm larger than the outer diameter of the thin end.
5. 5. The water turbine anti-ectopic link pin device of claim 1, wherein the depth of the threaded hole (2) is 1/4-1/3 of the total length of the link pin body (1), and is positioned at the axle center position of the link pin body (1).
6. 6. The water turbine anti-ectopic connecting plate pin device is suitable for a water guide mechanism of a mixed-flow water turbine, and comprises a control ring (5), a double-connecting arm (7), two lugs (8) and a crank arm (6), wherein the connecting plate pin body (1) is arranged in the lugs (8), the two lugs (8) are respectively connected with the control ring (5) and the crank arm (6), and the double-connecting arm (7) is in transmission connection with the control ring (5) and the crank arm (6) through the connecting plate pin body (1) and the lugs (8).
7. 7. The ectopic-preventing connecting plate pin device of the water turbine is characterized in that the preset distance is 2-4mm.

Description

Ectopic link pin device is prevented to hydraulic turbine Technical Field The utility model belongs to the technical field of connecting plate pins, and particularly relates to an anti-ectopic connecting plate pin device of a water turbine. Background The water guiding mechanism of the water turbine is a core component for adjusting the water flow direction and flow and guaranteeing the safe operation of the unit, and a transmission device of the water guiding mechanism of the water turbine is generally composed of components such as a control ring, a double-link arm, a crank arm, a connecting plate pin and the like. The connecting plate pin is used as a key transmission part for connecting the control ring and the crank arm, and needs to bear alternating load and keep stable connection when the guide vane acts. In the traditional design, the connecting plate pin ensures the matching precision with the pin holes through finish machining, is vertically inserted into the pin holes on two sides of the duplex arm after being installed, and depends on self gravity and friction force to maintain the position. However, because the control ring and the crank arm may have slight angular deviation in the operation of the water guide mechanism, or are influenced by factors such as mechanical vibration, water flow impact and the like, the link plate pin lacks effective axial restraint, and is difficult to completely limit the displacement thereof only by virtue of fit clearance and dead weight. Disclosure of utility model The utility model aims to provide an anti-ectopic connecting plate pin device of a water turbine, which aims to solve the problems in the background art. In order to achieve the above purpose, the present utility model provides the following technical solutions: An anti-alien web pin apparatus for a hydraulic turbine, comprising: The connecting plate pin comprises a connecting plate pin body, wherein a threaded hole is formed in the center of the bottom of the connecting plate pin body, a bolt is installed in the threaded hole, the head of the bolt is fixedly connected with a gasket, and the diameter of the gasket is larger than that of the thin end of the connecting plate pin body; And a preset interval is reserved between the gasket and the bottom end of the connecting plate pin body and used for limiting the connecting plate pin body to be lifted upwards in the action process of the water guide mechanism. Preferably, the screw thread specification of the bolt is matched with the screw hole, and the screwing depth of the bolt is adjustable. Preferably, the gasket is made of one of stainless steel and carbon steel, and has a thickness of 3-5mm. Preferably, the outer diameter of the thin end of the connecting plate pin body is 28-32mm, and the diameter of the gasket is 5-8mm larger than the outer diameter of the thin end. Preferably, the depth of the threaded hole is 1/4-1/3 of the total length of the connecting plate pin body, and the threaded hole is positioned at the axle center position of the connecting plate pin body. Preferably, the device is suitable for the water guide mechanism of mixed-flow hydraulic turbine, the water guide mechanism includes control ring, duplex arm, two handles, turning arm, link pin body sets up in the inside of handle, two the handle is connected respectively the control ring with the turning arm, duplex arm passes through link pin body and handle with the control ring with turning arm transmission is connected. Preferably, the preset distance is 2-4mm. Compared with the prior art, the utility model has the beneficial effects that: (1) Through add adjustable mechanical stop device in link pin bottom, effectively retrain the axial displacement of link pin, simple structure, need not to change former water guide mechanism major structure, the gasket diameter can be adjusted as required with the bolt screw in degree of depth, can adapt to the connection demand of different thickness control rings and turning arms. (2) And standardized parts and simple processing technology are adopted, so that the manufacturing cost and the maintenance man-hour are saved. Drawings FIG. 1 is a perspective view of the present utility model; FIG. 2 is a cross-sectional view of the present utility model; FIG. 3 is an exploded view of the present utility model; in the figure, 1, a connecting plate pin body, 2, a threaded hole, 3, a bolt, 4, a gasket, 5, a control ring, 6, a crank arm, 7, a duplex arm, 8 and an ear handle. Detailed Description The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to