A kind of water turbine large shaft air admission valve damper lifting test structure

Abstract

The application discloses a water turbine large shaft air supplement valve damper lifting test structure, which comprises an upper top seat, a lifting upper half, a lifting lower half, a pin connecting sheet, a pin pulling and sleeving device, a screw rod, a pull rod seat and a lower base; the upper top seat is connected to the middle of the lifting upper half through a pin, the lower base is connected to the middle of the lifting lower half through a pin, two pull rod seats are installed in the ear holes on the two sides of the lifting lower half through shafts at the two ends of the pull rod seats, the screw rod is connected through the screw threads in the interiors of the two pull rod seats, the lifting upper half and the lifting lower half are rotationally connected through the connecting bolts on the two sides, a rhombic structure capable of stretching up and down is formed, one end of the two pin connecting sheets is connected to the connecting bolts on the two sides respectively, the other end of the two pin connecting sheets is provided with a connecting hole, and the two connecting holes are used for connecting the pins in the pin pulling and sleeving device. The application is suitable for jacking the air supplement valve pressing plate in a space-limited air supplement valve chamber and can instantaneously release the device outside the valve chamber to make the air supplement valve pressing plate fall back.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tooling fixture, more particularly to a water turbine large shaft air supply valve damper lifting test structure. BACKGROUND

[0002] The water turbine air supply valve is used to open the air supply valve pressing plate when the vacuum generated by the draft tube under certain working conditions exceeds the set value, and air enters the draft tube through the large shaft to improve the water turbine operation condition. The damper is installed on the valve disc and the pressing plate of the air supply valve, so that the air supply valve pressing plate can be opened and closed slowly and limited, avoiding direct impact of the air supply valve pressing plate on other equipment, and making the air supply process stable and reducing air flow noise. During the maintenance of the large shaft air supply valve, the return time of the air supply valve pressing plate after opening to a certain height needs to be measured to ensure that the damper can function safely and reasonably.

[0003] Under non-operating conditions, there is no unified method for opening the air supply valve pressing plate. Considering that the float is made of non-magnetic stainless steel, the magnetic suction disc cannot be used to attract the float to pull it up. The tapping of the center of the float will damage the shaft sleeve structure between the air supply valve cover and the float. At present, the measure to open the air supply valve pressing plate is to put a jack into the valve chamber and manually operate the jack to open the air supply valve pressing plate to a certain height, and then remove the jack to make the air supply valve pressing plate freely fall back to measure its return time.

[0004] However, this method has the following difficulties: 1. The valve chamber space is small, and it is difficult to operate the jack to lift the air supply valve pressing plate; 2. Because the air supply valve pressing plate presses the damper, when the jack is lowered a little, the air supply valve pressing plate will also be lowered under the action of its own weight, making it difficult to remove the jack instantly and make the air supply valve pressing plate freely fall back, resulting in low test efficiency; 3. Due to the limited space of the valve chamber, instantaneous removal of the jack can easily injure the operator. SUMMARY

[0005] Therefore, the present application provides a water turbine large shaft air supply valve damper lifting test structure to solve the technical problems in the background art.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] The water turbine large shaft air supply valve damper lifting test structure comprises an upper top seat, a lifting upper half, a lifting lower half, a pin connecting plate, a pin pulling sleeve set, a screw rod, a pull rod seat and a lower base; the upper top seat is connected to the middle of the lifting upper half through a pin, the lower base is connected to the middle of the lifting lower half through a pin, two pull rod seats are installed in the ear holes on the two sides of the lifting lower half through shafts at both ends of the pull rod seats, the screw rod is connected through the threads inside the two pull rod seats, the lifting upper half and the lifting lower half are rotationally connected through the connecting bolts on the two sides, a rhombus structure that can be stretched up and down is formed, one end of the two pin connecting plates is connected to the connecting bolts on the two sides respectively, and the other end of the two pin connecting plates is provided with a connecting hole, and the two connecting holes are used for connecting the pins in the pin pulling sleeve set.

[0008] In some embodiments, the lifting upper half is connected by four long connecting plates through bolts two by two, and the middle part is rotationally connected through a pin shaft, and a sleeve is sleeved on the bolt in the middle part of the two oppositely arranged connecting plates.

[0009] In some embodiments, the lifting lower half is connected by four long connecting plates through bolts two by two, and the middle part is rotationally connected through a pin shaft, and a sleeve is sleeved on the bolt in the middle part of the two oppositely arranged connecting plates; the pull rod seat is fixed between the two oppositely arranged connecting plates of the lifting lower half.

[0010] In some embodiments, the two oppositely arranged connecting plates of the lifting lower half are provided with ear structures protruding outward, and the center through holes of the ear structures are used for installing and fixing the pull rod seat.

[0011] In some embodiments, the two pull rod seats are one on the left side and one on the right side, the radial center of one side of the pull rod seat is a through hole for the insertion end of the screw rod, and the radial center of the other side of the pull rod seat is a threaded hole for threaded connection with the extension end of the screw rod; the threaded end of the screw rod is clamped in the pull rod seat with a through hole in the radial center.

[0012] In some embodiments, the pin pulling sleeve set is composed of a steel wire, a pin and a sleeve, one side of the steel wire is connected to the end of the pin, and the other side is pulled out through the small hole at the bottom of the sleeve; the pin is installed in the sleeve.

[0013] In summary, the application has the following beneficial effects:

[0014] By using the water turbine air supply valve damper lifting test device of the application, the efficiency can be greatly improved, the air supply valve pressure plate can be lifted to a certain opening height at one time, and the air supply valve pressure plate can be loosened to a closed state at one time; it is safe to use, reduces the mechanical injury that may occur during operation in the air supply valve chamber, and the device is suitable for places with limited space in the air supply valve chamber. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the application. DETAILED DESCRIPTION

[0016] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings of the preferred embodiments of the present application. Identical or similar labels in the drawings represent identical or similar components or components with identical or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0017] The embodiments of the present application will be described in detail below with reference to the drawings.

[0018] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0019] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0020] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or display including a series of steps or units need not be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or displays.

[0021] The following will be described in combination with Figure 1 A water turbine large shaft air supply valve damper lifting test structure related to the embodiments of the present application will be described in detail. It should be noted that the following embodiments are only used to explain the present application and do not constitute a limitation of the present application.

[0022] Embodiment 1:

[0023] AsFigure 1 The water turbine large shaft air supply valve damper lifting test structure comprises an upper top seat 1, a lifting upper half 2, a lifting lower half 3, pin connecting plates 4, pin pulling sleeve sets 5, a screw rod 6, pull rod seats 7 and a lower bottom seat 8. The upper top seat is connected to the middle of the lifting upper half through a pin, the lower bottom seat is connected to the middle of the lifting lower half through a pin, the two pull rod seats are installed in the ear holes on the two sides of the lifting lower half through shafts at both ends of the pull rod seats, the screw rod is connected through the internal threads of the two pull rod seats, the lifting upper half and the lifting lower half are rotationally connected through the connecting bolts on the two sides, a rhombus structure that can be extended up and down is formed, one end of the two pin connecting plates is connected to the connecting bolts on the two sides respectively, the other end of the two pin connecting plates is provided with a connecting hole, and the two connecting holes are used for connecting the pins 9 in the pin pulling sleeve sets.

[0024] The water turbine large shaft air supply valve damper lifting test structure is suitable for jacking the air supply valve pressing plate in a space-limited air supply valve chamber and can instantaneously release the device outside the valve chamber to make the air supply valve pressing plate fall back, so that the safety, convenience and efficiency of the air supply valve damper returning test are improved.

[0025] The lifting upper half is connected by four long connecting plates through bolts two by two, rotationally connected through a pin shaft in the middle, and a sleeve is sleeved on the bolt in the middle of the two oppositely arranged connecting plates. The sleeve has a limiting and reinforcing effect. The lifting lower half 3 is similar in structure to the lifting upper half 2. The lifting lower half is connected by four long connecting plates through bolts two by two, rotationally connected through a pin shaft in the middle, and a sleeve is sleeved on the bolt in the middle of the two oppositely arranged connecting plates. The pull rod seat is fixed between the two oppositely arranged connecting plates of the lifting lower half.

[0026] The two oppositely arranged connecting plates of the lifting lower half are provided with ear structures protruding outward. The central through hole of the ear structure is used for installing and fixing the pull rod seat. The ear structure is provided to facilitate the installation of the pull rod seat 7.

[0027] The two pull rod seats are arranged on the left side and the right side respectively. The radial center of one pull rod seat is a through hole for the insertion end of the screw rod, and the radial center of the other pull rod seat is a threaded hole for the threaded connection with the extension end of the screw rod. The threaded end of the screw rod is clamped in the pull rod seat with a through hole in the radial center.

[0028] In some embodiments, the pin pulling sleeve set is composed of a steel wire, a pin and a sleeve. One side of the steel wire is connected to the end of the pin, and the other side is pulled out through the small hole at the bottom of the sleeve. The pin is installed in the sleeve. When working, the pin is inserted into the holes of the two pin connecting plates 4, the top of the sleeve is in close contact with the plane of the pin connecting plate 4, and when the pin is pulled out, the sleeve can stabilize the pin connecting plate so that the pin connecting plate and the pin are not stuck.

[0029] Normally, the upper base 1, the lower base 8, the lifting upper half 2, the lifting lower half 3, the pin connecting plate 4 and the pull rod base 7 are connected well Figure 1 The structure is connected well, and the device is placed on the valve disc of the air supply valve.

[0030] During work, the screw rod 6 is inserted into the pull rod base 7 from the insertion end to the extension end, and after the two screws are brought, the screw rod 6 is tightened by using an electric wrench. The lifting test device is lifted upward, the upper base 1 abuts against the air supply valve pressing plate, drives the air supply valve pressing plate to be lifted upward to the test height, the connecting holes of the two pin connecting plates 4 are opposite to each other, the pin 9 in the pin pulling sleeve 5 can be just inserted, the pin in the pin pulling sleeve 5 is inserted into the connecting holes of the two pin connecting plates 4, and then the screw rod 6 is loosened by using the electric wrench and is taken out. At this time, the pin in the pin pulling sleeve 5 will bear the downward shearing force of the lifting test device, so that the lifting test device is not loosened.

[0031] When the air supply valve shock absorber is lowered at the test height, the steel wire in the pin pulling sleeve 5 is pulled, the pin is pulled out by the steel wire, the lifting test device is lowered, the lowering speed of the lifting test device is faster than that of the air supply valve pressing plate connected with the shock absorber, so the air supply valve pressing plate is not hindered by the lifting test device during the downward movement of the air supply valve pressing plate, and the test can be successfully completed at one time, and the test efficiency is improved.

[0032] The above are preferred embodiments of the present application, and are not sequentially limited to the protection scope of the present application. For ordinary skilled persons in the art, equivalent changes made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A hydraulic turbine main shaft air supply valve shock absorber lifting test structure, characterized by: include: Upper top seat, lifting upper half, lifting lower half, pin connecting piece, pin pulling set, screw, pull rod seat and lower base; the upper top seat is connected to the middle of the lifting upper half by a pin, the lower base is connected to the middle of the lifting lower half by a pin, the two pull rod seats are installed in the ear holes on both sides of the lifting lower half through their own two end shafts, the screw is connected through the threads inside the left and right pull rod seats, the lifting upper half and the lifting lower half are rotatably connected by the connecting bolts on both sides to form a diamond structure that can be extended and retracted up and down, one end of the two pin connecting pieces are respectively connected to the connecting bolts on both sides, and the other ends of the two pin connecting pieces are provided with connecting holes, and the two connecting holes are used to connect the pins in the pin pulling set; The lifting lower half is composed of four long second connecting plates connected in pairs by bolts, and the middle part is connected by a pin, and the bolts between the two second connecting plates arranged opposite to each other are sleeved with a sleeve; the pull rod seat is fixed between the two second connecting plates arranged opposite to each other in the lifting lower half; The two tie rod seats are one on each side, the radial center of the tie rod seat on one side is a through hole for the insertion end of the screw, and the radial center of the tie rod seat on the other side is a threaded hole for threaded connection with the extension end of the screw; the nut end of the screw is clamped on the tie rod seat end with the through hole in the radial center; The pin puller set consists of a steel wire, a pin and a sleeve. One side of the steel wire is connected to the end of the pin, and the other side passes through a small hole at the bottom of the sleeve; the pin is installed in the sleeve.

2. A hydraulic turbine main shaft air supply valve shock absorber lifting test structure according to claim 1, characterized in that: The lifting upper half is composed of four long first connecting plates connected in pairs by bolts, and the middle part is rotatably connected by a pin shaft. The bolts between the two first connecting plates arranged opposite to each other are sleeved with sleeves.

3. The hydraulic turbine main shaft air supply valve shock absorber lifting test structure according to claim 1, characterized in that: Two second connecting plates arranged opposite to each other on the lifting lower half are provided with ear structures protruding outwards, and the central through hole of the ear structure is used for installing and fixing the pull rod seat.

Images