Telescopic mechanism and maintenance platform for hydropower station

Abstract

The utility model relates to the field of maintenance platforms, in particular to a contraction and expansion mechanism and a maintenance platform for a hydropower station, the contraction and expansion mechanism comprises a base body assembly, the base body assembly comprises a base plate, and folding plates are hinged to the two sides of the base plate; the expansion assembly comprises a telescopic frame arranged at one end of the folding plate in a sliding mode, and a protective net is detachably arranged on the telescopic frame; the fence assembly comprises fence frames, the fence frames are movably arranged on the base plate and the folding plate, and the fence frames are located at the end, close to the telescopic frame, of the base plate or the folding plate; through the design of the folding plate, the contraction and expansion mechanism can be folded in the width direction, the transverse width during hoisting is reduced, hoisting is more convenient, through the design of the expansion assembly, the contraction and expansion mechanism can be opened in the length direction so that the door groove can be closed, the door groove can be closed through one-time hoisting in cooperation with a protective net, and the hoisting efficiency is improved. The problem that a traditional steel cover plate needs to be hoisted many times for sealing is solved, labor intensity is reduced, and sealing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of overhaul platform especially a retractable mechanism and overhaul platform for hydropower station. BACKGROUND

[0002] The metal structures such as quick gate, pull rod and hydraulic hoist are mainly installed in the door groove of the quick door of the water inlet of the hydropower unit, and the quick door groove has multiple platforms, and the corresponding platforms need to be closed to form an overhaul platform when the quick gate, pull rod and oil cylinder are overhauled.

[0003] At present, the steel cover plate is mainly used for closing, and multiple steel cover plates need to be hoisted during closing, which is high in labor intensity, low in efficiency, high in safety risk, and after the steel cover plate is hoisted, the position of the steel cover plate needs to be adjusted, and due to the large weight of the steel cover plate, the steel cover plate is difficult to move, and the labor intensity is further improved. UTILITY MODEL CONTENTS

[0004] Therefore, the technical problem to be solved by the utility model is how to reduce the hoisting frequency, reduce the labor intensity and improve the closing efficiency when the quick gate, pull rod and oil cylinder are overhauled.

[0005] The above technical problem is solved by the following technical scheme: the utility model provides a retractable mechanism, which comprises a base assembly, the base assembly comprises a base plate, and folding plates are hinged on both sides of the base plate; an expansion assembly, the expansion assembly comprises a telescopic frame slidingly arranged at one end of the folding plate, and the telescopic frame slides along the length direction of the folding plate, and a protective net is detachably arranged on the telescopic frame; a fence assembly, the fence assembly comprises a fence frame, the fence frame is movably arranged on the base plate and the folding plate, and the fence frame is located at one end of the base plate or the folding plate close to the telescopic frame.

[0006] In a preferred embodiment of the retractable mechanism: the base assembly further comprises a driving piece arranged between the base plate and the folding plate, the driving piece comprises a first mounting frame fixedly arranged at the bottom of the base plate, an electric push rod is hinged on the first mounting frame, a second mounting frame is hinged at the end of the electric push rod away from the first mounting frame, and the second mounting frame is fixedly arranged at the bottom of the folding plate.

[0007] In a preferred embodiment of the retractable mechanism: the base assembly further comprises a hinge piece arranged between the base plate and the folding plate, the hinge piece comprises a first hinge plate fixedly arranged at the bottom of the base plate, a short shaft is rotatably arranged on the first hinge plate, a second hinge plate is rotatably arranged on the short shaft, and the second hinge plate is fixedly arranged at the bottom of the folding plate.

[0008] In a preferred embodiment of the retractable mechanism, the base plate comprises a first flat plate, and first rectangular tubes are arranged at both sides of the bottom of the first flat plate; the folding plate comprises a second flat plate, and second rectangular tubes are arranged at both sides of the bottom of the second flat plate; the first hinge plate is fixed at the bottom of the first rectangular tube, and the second rectangular tube close to the first rectangular tube is fixed with a second hinge plate at the bottom.

[0009] In a preferred embodiment of the retractable mechanism, the expansion assembly further comprises a slide channel arranged in the second rectangular tube, the slide channel is in the shape of a circular tube and is arranged along the length direction of the second rectangular tube; the telescopic frame comprises a slide rod arranged in the slide channel; and an end frame is fixed to the outer end of the slide rod, and a moving wheel is arranged at the lower part of the end frame.

[0010] In a preferred embodiment of the retractable mechanism, the expansion assembly further comprises a first positioning member arranged at the upper part of one of the slide rods, the first positioning member comprises a first positioning pin movably arranged on the folding plate, and a first positioning hole is arranged on the slide rod below the first positioning pin.

[0011] In a preferred embodiment of the retractable mechanism, the end frame is provided with a plug-in hole at the side close to the base plate, and a connecting rod is arranged in the plug-in hole.

[0012] In a preferred embodiment of the retractable mechanism, the fence assembly further comprises a short rod rotatably arranged at both sides of the lower end of the fence frame, an angle iron frame is rotatably arranged on the short rod, the angle iron frame is fixed on the base plate or the folding plate, the upper end of the angle iron frame is open and away from the expansion assembly, a second positioning hole and a third positioning hole are arranged on the angle iron frame, the second positioning hole is arranged at the upper part of the short rod, the third positioning hole is arranged at the side of the short rod away from the expansion assembly, the center line of the third positioning hole and the center line of the short rod are in the same plane, and a second positioning pin is arranged in the second positioning hole or the third positioning hole.

[0013] In a preferred embodiment of the retractable mechanism, the fence assembly further comprises a short rod rotatably arranged at both sides of the lower end of the fence frame, an angle iron frame is rotatably arranged on the short rod, the angle iron frame is fixed on the base plate or the folding plate, the upper end of the angle iron frame is open and away from the expansion assembly, a second positioning hole and a third positioning hole are arranged on the angle iron frame, the second positioning hole is arranged at the upper part of the short rod, the third positioning hole is arranged at the side of the short rod away from the expansion assembly, the center line of the third positioning hole and the center line of the short rod are in the same plane, and a second positioning pin is arranged in the second positioning hole or the third positioning hole.

[0014] The beneficial effects of this utility model are as follows: the design of the folding plate allows the retractable mechanism to fold in the width direction, reducing the lateral width during hoisting and thus reducing the volume during hoisting, making hoisting more convenient. The design of the extension component allows the retractable mechanism to expand and open in the length direction to meet the length requirements for closure at the door slot. A single hoisting operation combined with a protective net can achieve closure at the door slot, solving the problem of multiple hoisting operations required for traditional steel cover plate closures, reducing labor intensity, and improving closure efficiency.

[0015] To address the problem of difficulty in moving the platform to the maintenance position in the existing technology, this application also proposes a maintenance platform for hydropower stations, including the above-mentioned retractable mechanism, and also including a walking component. The walking component includes walking wheels disposed at the bottom of the folding plate, and the walking wheels are located on the side of the folding plate away from the base plate.

[0016] The beneficial effects of this utility model are as follows: by setting the walking wheels on the folding plate, the maintenance platform is pushed more effortlessly, reducing labor intensity and solving the problem of difficulty in moving the maintenance platform. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0018] Figure 1 A schematic diagram of the overall structure of the retraction mechanism is shown;

[0019] Figure 2 A schematic diagram of the retractable mechanism when it is deployed is shown;

[0020] Figure 3 A schematic diagram of the connection structure between the substrate and the folded plate is shown;

[0021] Figure 4 It shows Figure 3 Enlarged view of the structure at point A;

[0022] Figure 5 A schematic diagram of the folding plate structure is shown;

[0023] Figure 6 It shows Figure 5 Enlarged view of the structure at point B;

[0024] Figure 7 It shows Figure 5 Enlarged view of the structure at point C;

[0025] Figure 8 A schematic diagram of the overall structure of the maintenance platform is shown. Detailed Implementation

[0026] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with specific embodiments and drawings.

[0027] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions regarding the present application, but the terms can be changed according to the intention of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meanings thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as mere names, but based on the meanings of the terms and the overall description of the present application.

[0028] Embodiment 1, refer to Figures 1-3 The present embodiment provides a folding and unfolding mechanism, comprising,

[0029] The base assembly 1 comprises a base plate 11, and the base plate 11 is a rectangular plate as a whole, and folding plates 12 are hingedly connected to both sides of the base plate 11, and the folding plates 12 are rectangular plates consistent with the length of the base plate 11;

[0030] The expansion assembly 2 comprises a telescopic frame 21 slidingly arranged at one end of the folding plate 12, and the telescopic frame 21 slides along the length direction of the folding plate 12, and a protective net 22 is detachably arranged on the telescopic frame 21;

[0031] The fence assembly 3 comprises a fence frame 31, and the fence frame 31 is movably arranged on the base plate 11 and the folding plate 12, and the fence frame 31 is located at one end of the base plate 11 or the folding plate 12 close to the telescopic frame 21.

[0032] The folding and unfolding mechanism of the present application is designed as a whole to be collapsible and expandable, the folding plates 12 are hingedly connected to both sides of the base plate 11 to form folding or unfolding in the width direction, one end of the base plate 11 is provided with the expansion assembly 2 which can be retracted towards the base plate 11 or expanded away from the base plate 11 to form contraction or expansion in the length direction; specifically applied to the maintenance of the gate slot of a hydropower station, initially, the folding plates 12 are in a folded state, the telescopic frame 21 is in a contracted state of retracting towards the base plate 11, and the protective net 22 is not installed on the telescopic frame 21, a hoisting device is used to hoist the folding and unfolding mechanism, and when the folding and unfolding mechanism is lowered to the appropriate position, the distance from the ground is about 1.2 m, the folding plates 12 are opened to expand the folding and unfolding mechanism in the width direction, the telescopic frame 21 is continuously lowered to the maintenance plane to expand the telescopic frame 21 away from the base plate 11, the folding and unfolding mechanism is expanded in the length direction, then the protective net 22 is installed on the telescopic frame 21, and the fence frame 31 is opened to make the fence frame 31 in a vertical state, wherein the protective net 22 can be directly placed on the telescopic frame 21, or detachably fixed on the telescopic frame 21 through screws, of course, other detachable installation methods can also be used.

[0033] Of course, with reference to Figure 1 , in order to facilitate hoisting, the base plate 11 is provided with lifting lugs 111 near the four corners.

[0034] From the hoisting process of the folding and unfolding mechanism when overhauling, it can be seen that through the design of the folding plate 12, the folding and unfolding mechanism can be folded in the width direction, thereby reducing the transverse width during hoisting, and further reducing the volume during hoisting, so that hoisting is more convenient. Through the design of the expansion assembly 2, the folding and unfolding mechanism can be expanded and opened in the length direction to meet the length requirement of the closure at the door slot, and the closure at the door slot can be realized by one hoisting of the protective net 22, thereby solving the problem of multiple hoisting required by the traditional steel cover plate closure, reducing the labor intensity, and improving the closure efficiency.

[0035] With reference to Figure 3 , preferably, the base assembly 1 further comprises a driving member 13 arranged between the base plate 11 and the folding plate 12, the driving member 13 comprising a first mounting bracket 131 fixedly arranged at the bottom of the base plate 11, an electric push rod 132 being hingedly connected to the first mounting bracket 131, and a second mounting bracket 133 being hingedly connected to the end of the electric push rod 132 away from the first mounting bracket 131, the second mounting bracket 133 being fixedly arranged at the bottom of the folding plate 12.

[0036] In actual application, the overall structure of the folding and unfolding mechanism is relatively large, and it is laborious to manually unfold the folding plate 12, and the unfolded folding plate 12 needs to be supported and fixed. In the present application, the electric push rod 132 is used to drive the folding and unfolding of the folding plate 12, and the unfolded folding plate 12 can be supported by the electric push rod 132.

[0037] With reference to Figures 3-4 , preferably, the base assembly 1 further comprises a hinge member 14 arranged between the base plate 11 and the folding plate 12, the hinge member 14 comprising a first hinge plate 141 fixedly arranged at the bottom of the base plate 11, a short shaft 142 rotatably arranged on the first hinge plate 141, and a second hinge plate 143 rotatably arranged on the short shaft 142, the second hinge plate 143 being fixedly arranged at the bottom of the folding plate 12.

[0038] The base plate 11 and the folding plate 12 are hingedly connected through the hinge member 14, and specifically, the first hinge plate 141 and the second hinge plate 143 are rotatably connected through the short shaft 142. When the base plate 11 and the folding plate 12 are hingedly connected, there is a certain gap between the base plate 11 and the folding plate 12 to ensure smoothness of the hinge connection. In order to ensure that the upper surfaces of the folding plate 12 and the base plate 11 are flush after the folding plate 12 is unfolded, the side surfaces of the folding plate 12 and the base plate 11 that are close to each other are provided with mutually cooperating pad plates 144 to limit the rotation angle of the folding plate 12.

[0039] With reference to Figure 1 and Figures 3-4, preferably, the base plate 11 comprises a first flat plate 112, and the first flat plate 112 is provided with a first rectangular tube 113 at the bottom of each side, the folding plate 12 comprises a second flat plate 121, and the second flat plate 121 is provided with a second rectangular tube 122 at the bottom of each side, the first hinge plate 141 is fixed at the bottom of the first rectangular tube 113, and the second hinge plate 143 is fixed at the bottom of the second rectangular tube 122 close to the first rectangular tube 113.

[0040] In actual design, the side of the base plate 11 and the folding plate 12 are respectively arranged with the first rectangular tube 113 and the second rectangular tube 122, which is convenient for the installation of the hinge 14 and used for accommodating the telescopic support 21, thereby facilitating the installation of the telescopic support 21.

[0041] Referring to Figures 5-6 , in embodiment 2, the expansion assembly 2 further comprises a slide 23 arranged in the second rectangular tube 122, the slide 23 is in the shape of a circular tube and is arranged along the length direction of the second rectangular tube 122, the telescopic support 21 comprises a slide rod 211 arranged in the slide 23, and the outer end of the slide rod 211 is fixed with an end support 212, and the lower part of the end support 212 is provided with a moving wheel 213.

[0042] The telescopic support 21 is specifically composed of a plurality of slide rods 211 and end supports 212, and two slides 23 can be arranged in the second rectangular tube 122 of each side of the folding plate 12 to ensure sufficient support strength of the telescopic support 21, in the same second rectangular tube 122, one slide 23 is fixed at the top of the inner end of the second rectangular tube 122, and the other slide 23 is fixed at the bottom of the inner end of the second rectangular tube 122, at this time, the telescopic support 21 comprises four slide rods 211, and each of the slide rods 211 is correspondingly arranged in the slide 23 of each side of the folding plate 12; of course, in order to avoid the mutual influence of the hinge 14 and the slide 23, two second rectangular tubes 122 can be arranged on the side of the folding plate 12 close to the base plate 11, the second rectangular tube close to the base plate 11 is used for installing the hinge 14, and the other is used for installing the slide 23, of course, two slides 23 can also be arranged in the second rectangular tube 122 away from the base plate 11, and one slide 23 is arranged at the inner top of the second rectangular tube 122 close to the base plate 11, so as to avoid the mutual influence of the folding member and the slide 23, at this time, the telescopic support 21 has three slide rods 211, and the telescopic support 21 has simple overall structure and light weight.

[0043] Referring to Figures 5-6 , preferably, the expansion assembly 2 further comprises a first positioning member 24 arranged at the upper part of one of the slide rods 211, the first positioning member 24 comprises a first positioning pin 241 movably arranged on the folding plate 12, and the first positioning pin 241 is provided with a first positioning hole 242 at the lower part of the slide rod 211.

[0044] The slide rod 211 has a plurality of first positioning holes 242 corresponding to the positions of the first positioning pins 241, for positioning the telescopic frame 21 after it is retracted or expanded.

[0045] With reference to Figure 1 and Figure 5 Preferably, the end frame 212 is provided with a plug hole 214 near the side close to the base plate 11, and a connecting rod 215 is inserted into the plug hole 214.

[0046] The connecting rod 215 is inserted between the telescopic frames 21 on both sides of the base plate 11 through the plug hole 214 after the folding plates 12 are unfolded, and is used to connect the telescopic frames 21 on both sides of the base plate 11, thereby providing better support for the protective net 22, improving the stability of the telescopic frame 21 after it is unfolded, and providing certain support for the folding plates 12. The connecting rod 215 can be removed from the telescopic frames 21 when the folding plates 12 need to be folded.

[0047] With reference to Figure 1 , Figure 5 and Figure 7 In Example 3, the fence assembly 3 further comprises a short rod 32 rotatably arranged at the lower end of the fence frame 31 on both sides, an angle iron frame 33 is rotatably arranged on the short rod 32, the angle iron frame 33 is fixed on the base plate 11 or the folding plate 12, the upper end of the angle iron frame 33 is open and away from the expansion assembly 2, the second positioning hole 34 and the third positioning hole 35 are arranged on the angle iron frame 33, the second positioning hole 34 is located at the upper position of the short rod 32, the third positioning hole 35 is located on the side away from the expansion assembly 2, and the center line of the third positioning hole 35 and the center line of the short rod 32 are in the same plane, and the second positioning pin 36 is inserted into the second positioning hole 34 or the third positioning hole 35.

[0048] The fence frame 31 is hinged to the folding plate 12 or the base plate 11 through the angle iron frame 33 and the short rod 32, so as to realize the folding and unfolding of the fence frame 31. The second positioning hole 34 and the third positioning hole 35 are arranged on the angle iron frame 33, and the second positioning pin 36 is arranged to position the fence frame 31 when it is unfolded or folded. Of course, the fence frame 31 is provided with plug holes corresponding to the positions of the second positioning hole 34 and the third positioning hole 35.

[0049] With reference to Figure 1 In Example 4, the telescopic unfolding mechanism further comprises a splicing assembly 4, the splicing assembly 4 comprises a lock body 41 arranged on one of the folding plates 12 and a hook 42 arranged on the other folding plate 12, the lock body 41 and the hook 42 are adapted, the distance between the lock body 41 and the base plate 11 is the same as the distance between the hook 42 and the base plate 11, and the lock body 41 and the hook 42 are respectively located on the sides away from the expansion assembly 2 of the two folding plates 12.

[0050] The two telescopic mechanisms can also be spliced together, and the lock body 41 and the hook 42 form a snap structure. After the two telescopic mechanisms are spliced, the snap structure is locked. The snap structure is a commonly used locking structure in the prior art, and the specific structure and mounting method will not be described here. Specifically, the two telescopic mechanisms are butted together at the end away from the expansion assembly 2, and then the lock body 41 and the hook 42 on the two telescopic mechanisms are buckled together, so that the two telescopic mechanisms are tightly spliced together.

[0051] With reference to Figure 8 , embodiment 5, a maintenance platform for a hydropower station, comprising an upper telescopic mechanism, further comprising a walking assembly 5, the walking assembly 5 comprising walking wheels 51 arranged at the bottom of the folding plate 12, the walking wheels 51 being located on the side of the folding plate 12 away from the base plate 11.

[0052] In actual application, the maintenance platform often needs to be attached to the locking beam to achieve closure. When hoisting, the folding plate 12 of the maintenance platform is unfolded, and then the maintenance platform is lowered to the plane, and then the maintenance platform is pushed close to the locking beam and finally attached to the locking beam. By arranging the walking wheels 51 on the folding plate 12, the maintenance platform is more labor-saving and the labor intensity is reduced. In order to make the maintenance platform more attached to the locking beam, a notch 123 is arranged on the outer side of the end of the folding plate 12 away from the expansion assembly 2.

[0053] Finally, it should be pointed out that the above detailed description of the method and device is only an embodiment, and those skilled in the art can modify the embodiment in different ways without departing from the scope of the present application.

Claims

1. A retraction mechanism characterized by: The utility model relates to a foldable fence, which comprises a base assembly (1) and an extension assembly (2) and a fence assembly (3). The base assembly (1) comprises a base plate (11) and a folding plate (12) hinged to both sides of the base plate (11). The extension assembly (2) comprises a telescopic frame (21) slidingly arranged at one end of the folding plate (12) and a protective net (22) detachably arranged on the telescopic frame (21). The fence assembly (3) comprises a fence frame (31) movably arranged on the base plate (11) and the folding plate (12) and located at the end of the base plate (11) or the folding plate (12) close to the telescopic frame (21).

2. The crimping mechanism of claim 1, wherein: The base assembly (1) further comprises a driving member (13) arranged between the base plate (11) and the folding plate (12), the driving member (13) comprising a first mounting frame (131) fixedly arranged at the bottom of the base plate (11), an electric push rod (132) hinged to the first mounting frame (131), and a second mounting frame (133) hinged to the end of the electric push rod (132) away from the first mounting frame (131) and fixedly arranged at the bottom of the folding plate (12).

3. The crimping mechanism of claim 2, wherein: The base assembly (1) further comprises a hinge member (14) arranged between the base plate (11) and the folding plate (12), the hinge member (14) comprising a first hinge plate (141) fixedly arranged at the bottom of the base plate (11), a short shaft (142) rotatably arranged on the first hinge plate (141), and a second hinge plate (143) rotatably arranged on the short shaft (142) and fixedly arranged at the bottom of the folding plate (12).

4. The crimping mechanism of claim 3, wherein: The base plate (11) comprises a first flat plate (112) and first rectangular tubes (113) arranged at both sides of the bottom of the first flat plate (112), and the folding plate (12) comprises a second flat plate (121) and second rectangular tubes (122) arranged at both sides of the bottom of the second flat plate (121), the first hinge plate (141) being fixedly arranged at the bottom of the first rectangular tube (113), and the second hinge plate (143) being fixedly arranged at the bottom of the second rectangular tube (122) close to the first rectangular tube (113).

5. The crimping mechanism of claim 4, wherein: The extension assembly (2) further comprises a slide (23) arranged in the second rectangular tube (122), the slide (23) being in the shape of a circular tube and arranged along the length direction of the second rectangular tube (122), the telescopic frame (21) comprising a slide rod (211) slidingly arranged in the slide (23), the outer end of the slide rod (211) being fixedly provided with an end frame (212), and the lower part of the end frame (212) being provided with a moving wheel (213).

6. The crimping mechanism of claim 5, wherein: The expansion assembly (2) further comprises a first positioning member (24) arranged on the upper portion of one of the slide rods (211), wherein the first positioning member (24) comprises a first positioning pin (241) vertically movably arranged on the folding plate (12), and the slide rod (211) at the lower portion of the first positioning pin (241) is provided with a first positioning hole (242).

7. The crimping mechanism of claim 6, wherein: The end frame (212) is provided with a plug-in hole (214) on the side close to the base plate (11), and a connecting rod (215) is inserted into the plug-in hole (214).

8. The crimping mechanism of claim 7, wherein: The fence assembly (3) further comprises a short rod (32) rotatably arranged at the lower end of the fence frame (31) on both sides, wherein the short rod (32) is rotatably provided with an angle iron frame (33), the angle iron frame (33) is fixed on the base plate (11) or the folding plate (12), the upper end of the angle iron frame (33) is open and away from the expansion assembly (2), the angle iron frame (33) is provided with a second positioning hole (34) and a third positioning hole (35), the second positioning hole (34) is located on the upper portion of the short rod (32), the third positioning hole (35) is located on the side away from the expansion assembly (2), and the center line of the third positioning hole (35) and the center line of the short rod (32) are in the same plane, and the second positioning hole (34) or the third positioning hole (35) is inserted with a second positioning pin (36).

9. The crimping mechanism of claim 8, wherein: The splicing assembly (4) comprises a lock body (41) arranged on one of the folding plates (12) and a hook (42) arranged on the other folding plate (12), the lock body (41) and the hook (42) are matched, the distance between the lock body (41) and the base plate (11) is the same as the distance between the hook (42) and the base plate (11), and the lock body (41) and the hook (42) are located on the sides away from the expansion assembly (2) of the two folding plates (12) respectively.

10. A maintenance platform for a hydroelectric power station, characterised in that: The expansion mechanism according to any one of claims 1-9 further comprises a walking assembly (5), wherein the walking assembly (5) comprises a walking wheel (51) arranged at the bottom of the folding plate (12), and the walking wheel (51) is located on the side of the folding plate (12) away from the base plate (11).

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