A wind-resistant metal roof structure for a hydropower plant powerhouse

Abstract

The present application relates to the technical field of metal roof, and particularly relates to a wind pressure resistant metal roof structure for hydropower station workshop. The wind pressure resistant metal roof structure comprises a steel structure, a roof board installed on the steel structure, a first supporting mechanism, two groups of U-shaped frames A slidably installed in the roof board, two groups of sliding grooves A provided on the roof board, vertical plates A elastically slidably installed in the sliding grooves A and fixedly installed on the U-shaped frames A, two groups of purlin frames A fixedly installed in the steel structure, rotating discs A rotatably installed in the purlin frames A, and struts A hingedly connected to the rotating discs A. The wind pressure resistant metal roof structure can form a stable triangular structure by extruding the convex shafts A on the sliding blocks A through the grooves A of the extruding plates A when the vertical plates A are impacted by strong wind, and the struts A and the struts B can form a stable triangular structure with the purlin frames A. The orientation of the struts A and the struts B can be changed according to the wind direction of the strong wind through the switching mechanism, so that the purlin frames A can be provided with upward or downward wind pressure resistance.

Description

Technical Field

[0001] This invention relates to the field of metal roofing technology, and more particularly to a wind-pressure resistant metal roof structure for hydropower plant buildings. Background Technology

[0002] Steel structure workshops are widely used due to their advantages such as high strength, light weight, and fast construction speed. When facing natural disasters such as strong winds, the stability of the workshop structure is crucial.

[0003] Current steel structure factory roof structures can resist the wind pressure exerted on the factory roof to a certain extent by changing the airflow path through the use of a low slope structure. However, if the strong wind flows along the length of the factory, it will still exert a weak positive pressure and a strong negative pressure on the factory roof, and the factory roof structure will still be damaged. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a wind-pressure resistant metal roof structure for hydropower plant buildings.

[0005] The technical solution is as follows: A wind-pressure resistant metal roof structure for a hydropower station powerhouse includes a steel structure, on which a roof panel is installed, and a first support mechanism. The first support mechanism includes two sets of U-shaped frames A slidably installed within the roof panel. Two sets of sliding grooves A are opened through the roof panel. Vertical plates A are elastically slidably installed within the sliding grooves A and fixedly installed on the U-shaped frames A. Two sets of purlin frames A are fixedly installed within the steel structure. A turntable A is rotatably installed within the purlin frame A. A support bar A is hinged to the turntable A. A support bar B is hinged to the support bar A. A turntable B is hinged to the support bar B. A switching mechanism for changing the direction of the support bar A and the support bar B is installed within the purlin frame A.

[0006] As an improvement to the above solution, the first support mechanism also includes a slider A that is elastically slidably installed in the purlin frame A, the turntable B is rotatably installed on the slider A, an extrusion plate A is fixedly installed in the U-shaped frame A, a convex shaft A is fixedly installed on the slider A, a groove A that cooperates with the convex shaft A is opened on the extrusion plate A, and a first limiting component is installed on the U-shaped frame A.

[0007] As an improvement to the above solution, the first limiting component includes a pair of elastic telescopic rods A mounted on the U-shaped frame A. The telescopic ends of the elastic telescopic rods A are fixedly mounted with limiting blocks A. The limiting blocks A are slidably mounted on the purlin frame A. The slider A has a pair of slots A that cooperate with the limiting blocks A.

[0008] As an improvement to the above solution, the switching mechanism includes an adjusting plate slidably mounted on the U-shaped frame A. The U-shaped frame A has a through slot. An L-shaped rod located in the through slot is fixedly mounted on the adjusting plate. A drive rack is fixedly mounted on the L-shaped rod. The drive rack is slidably mounted inside the purlin frame A. A drive gear that meshes with the drive rack is rotatably mounted inside the purlin frame A. The axle of the drive gear is fixedly connected to the turntable A.

[0009] As an improvement to the above solution, a second support mechanism is also included. The second support mechanism includes two sets of U-shaped frames B that are slidably installed on the roof panel. Two sets of sliding grooves B are opened through the roof panel. Vertical plates B that are fixedly installed on the U-shaped frames B are slidably installed in the sliding grooves B. Two sets of purlin frames B are fixedly installed in the steel structure. Support bars C are hinged in the purlin frames B. Support bars D are hinged on the support bars C.

[0010] As an improvement to the above solution, the second support mechanism also includes a slider B that is elastically slidably installed in the purlin frame B, the support bar D is hinged to the slider B, an extrusion plate B is fixedly installed on the U-shaped frame B through a connecting plate, a convex shaft B is fixedly installed at the bottom of the slider B, a groove B that cooperates with the convex shaft B is provided on the extrusion plate B, and a second limiting component is installed on the U-shaped frame B.

[0011] As an improvement to the above solution, the second limiting component includes a pair of elastic telescopic rods B mounted on the U-shaped frame B. The telescopic ends of the elastic telescopic rods B are fixedly mounted with limiting blocks B. The limiting blocks B are slidably mounted on the purlin frame B. The slider B has a pair of slots B that cooperate with the limiting blocks B.

[0012] As an improvement to the above solution, a reinforcing mechanism is also included. The reinforcing mechanism includes three sets of lifting rods that are slidably mounted through the roof panel. A swing plate is hinged to the lifting rod, and a pull-down assembly is connected to the lifting rod. The pull-down assembly is connected to the steel structure.

[0013] As an improvement to the above solution, a horizontal plate is also included, which is fixedly installed on the swing plate.

[0014] As an improvement to the above solution, it also includes a rectangular frame that is elastically slidably mounted on the lifting rod in the horizontal direction, and a pair of support rods that cooperate with the swing plate are hinged inside the rectangular frame.

[0015] The present invention has the following advantages: 1. Through the design of the first support mechanism, when strong winds impact the vertical plate A, the groove A of the compression plate A presses the convex shaft A on the slider A, which enables the support bar A, support bar B and purlin frame A to form a stable triangular structure. The switching mechanism can change the orientation of support bar A and support bar B according to the wind direction of the strong wind, thereby providing the purlin frame A with upward or downward wind pressure resistance.

[0016] 2. Through the design of the second support mechanism, when strong winds impact the vertical plate B, the groove B of the compression plate B compresses the convex shaft B on the slider B, which enables the support bars C and D to form a stable triangular structure with the purlin frame B, thereby enhancing the downward wind pressure resistance of the purlin frame B.

[0017] 3. Through the design of the reinforcing mechanism, this invention enables the horizontal plate to swing when strong winds impact the horizontal plate. Furthermore, depending on the direction of the strong winds, the strong winds provide lift to the swing plate. The support rods provide support for the swing plate, preventing it from swinging arbitrarily when impacted by strong winds, thus preventing the swing plate from receiving stable lift. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the first support mechanism of the present invention; Figure 3 This is a schematic diagram of the installation of the turntable at point A of the present invention; Figure 4 This is a schematic diagram of the installation of the support bar at point A of the present invention; Figure 5 This is a schematic diagram of the structure of the first limiting component of the present invention; Figure 6 This is a schematic diagram of the structure of slider A of the present invention; Figure 7 This is a schematic diagram of the switching mechanism of the present invention; Figure 8 This is a schematic diagram of the installation of the drive gear in this invention; Figure 9 This is a schematic diagram of the installation at point B of the U-shaped frame of the present invention; Figure 10 This is a schematic diagram of the structure of the second support mechanism of the present invention; Figure 11 This is a schematic diagram of the installation of the limiting block B of the present invention; Figure 12 This is a schematic diagram of the reinforcing mechanism of the present invention; Figure 13 This is a schematic diagram of the installation of the support rod of the present invention.

[0019] Labels in the diagram: 1-Steel structure, 101-Roof panel, 201-U-shaped frame A, 202-Vertical plate A, 203-Purlin frame A, 204-Turntable A, 205-Support A, 206-Support B, 207-Turntable B, 301-Slider A, 302-Extrusion plate A, 401-Elastic telescopic rod A, 402-Limit block A, 501-Adjusting plate, 502-Drive rack, 50 3-Drive gear, 601-U-shaped frame B, 602-Vertical plate B, 603-Purlin frame B, 604-Support bar C, 605-Support bar D, 701-Slider B, 702-Extrusion plate B, 801-Elastic telescopic rod B, 802-Limit block B, 901-Lifting rod, 902-Swing plate, 903-Pull-down assembly, 1001-Horizontal plate, 1101-Rectangular frame, 1102-Support rod. Detailed Implementation

[0020] The technical solution will be further described below with reference to specific embodiments. It should be noted that the terms "up," "down," "left," and "right" used in this document refer only to the position of the structure shown in the corresponding drawings. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and have no sequential or technical meaning. Unless otherwise specified, terms such as "connection" and "linkage" in this application include both direct and indirect connections (linkages). Example 1

[0021] A wind-pressure resistant metal roof structure for a hydropower station powerhouse, such as Figures 1-3 As shown, the system includes a steel structure 1, on which a roof panel 101 is mounted. It also includes a first support mechanism, which comprises two sets of U-shaped frames A201 slidably mounted within the roof panel 101 in a front-to-back direction. Each set consists of two frames, located on the front and rear sides of the roof panel 101 respectively, and arranged opposite each other. Two sets of sliding grooves A are perforated in the roof panel 101, each set consisting of two grooves, arranged opposite each other. A component is elastically slidably mounted within the sliding grooves A and fixedly installed on the top of the U-shaped frames A201. The vertical plate A202, steel structure 1 has two sets of purlin frames A203 fixedly installed inside, each set consisting of two, and arranged opposite each other on the left and right. The purlin frame A203 is located on the lower side of the corresponding U-shaped frame A201. A turntable A204 is rotatably installed inside the purlin frame A203. A support bar A205 is hinged to the turntable A204. A support bar B206 is hinged to the support bar A205. A turntable B207 is hinged to the support bar B206. A switching mechanism for changing the direction of the support bar A205 and the support bar B206 is installed inside the purlin frame A203.

[0022] like Figures 3-6As shown, the first support mechanism also includes a slider A301 that is elastically slidably installed in the purlin frame A203, a turntable B207 that is rotatably installed on one side of the slider A301, an extrusion plate A302 that is fixedly installed on the inner wall of the U-shaped frame A201 near the slider A301, a convex shaft A that is fixedly installed on the top of the slider A301, and a groove A that cooperates with the convex shaft A is provided on one side of the extrusion plate A302. When the extrusion plate A302 moves, it can make the slider A301 move by cooperating with the convex shaft A. A first limiting component is installed on the U-shaped frame A201.

[0023] like Figure 5 and Figure 6 As shown, the first limiting component includes a pair of elastic telescopic rods A401 installed on the inner wall of the U-shaped frame A201. A limiting block A402 is fixedly installed at the telescopic end of the elastic telescopic rod A401. The limiting block A402 is slidably installed on the purlin frame A203. A pair of slots A are provided on the front and rear sides of the slider A301 to cooperate with the limiting block A402. When the limiting block A402 is inserted into the slot A, it can limit the slider A301.

[0024] like Figure 7 and Figure 8 As shown, the switching mechanism includes an adjusting plate 501 that is slidably mounted on a U-shaped frame A201 in the front-back direction. A through slot is provided on the U-shaped frame A201 located on the lower side of the adjusting plate 501. An L-shaped rod is fixedly mounted on the adjusting plate 501 in the through slot. A drive rack 502 is fixedly mounted at the bottom of the L-shaped rod. The drive rack 502 is elastically slidably mounted in a purlin frame A203 in the front-back direction. The elastic force of the drive rack 502 is less than the elastic force of the vertical plate A202. A drive gear 503 that meshes with the drive rack 502 is rotatably mounted in the purlin frame A203. The axle of the drive gear 503 is fixedly connected to a turntable A204. When the adjusting plate 501 moves, it can make the turntable A204 rotate.

[0025] Initially, supports A205 and B206 are both retracted within their corresponding purlin frames A203, forming an upward-facing triangular structure with the purlin frame A203. This facilitates volume reduction and installation during factory construction. When strong winds flow from front to back, because the elasticity of the drive rack 502 is less than that of the vertical plate A202, the two front adjusting plates 501 are impacted by the strong wind, causing their corresponding drive racks 502 to abut against the inner wall of the purlin frame A203. The drive racks 502 stabilize the two front adjusting plates 501 via the L-shaped rod. The two rear adjusting plates 501 are blown by the strong wind and slide backward along their corresponding U-shaped frames A201. Section plate 501 drives the corresponding L-shaped rod to slide backward along the through groove of U-shaped frame A201. The L-shaped rod drives the corresponding drive rack 502 to elastically contract and slide along purlin frame A203. Drive rack 502 drives drive gear 503 to rotate. The axle of drive gear 503 drives turntable A204 to rotate. Turntable A204 drives turntable B207 to rotate 180 degrees through support bars A205 and B206. It should be noted that the internal space of purlin frame A203 is sufficient for support bars A205 and B206 to rotate. Subsequently, the four vertical plates A202 are blown by strong wind and elastically extend and slide backward along the sliding groove A of roof panel 101, driving U-shaped frame A201 backward. The sliding mechanism causes the U-shaped frame A201 to move the extrusion plate A302 backward, which in turn moves the limiting block A402 backward via the elastic telescopic rod A401. The limiting block A402 extends into the purlin frame A203. The extrusion plate A302 presses against the convex shaft A on the slider A301 through its groove A. The convex shaft A, under pressure, causes the slider A301 to elastically contract and slide. The slider A301 then moves the support bar B206 via the turntable B207, and the support bar B206 moves the support bar A205. Subsequently, the slider A301 contacts and presses against the wedge-shaped surface of the limiting block A402. The limiting block A402, under pressure, causes the elastic telescopic rod A401 to elastically contract until the limiting block A402 and the slider A301... When the slots A of 01 are aligned, the elastic telescopic rod A401 extends elastically and drives the limiting block A402 to slide into the slot A to limit the slider A301. The support bars A205 and B206 on the front side and the purlin frame A203 form an upward stable triangular structure, thereby providing the two purlin frames A203 on the front side with a force to resist positive pressure and prevent the two purlin frames A203 on the front side from bending downward under the action of positive pressure. At the same time, the support bars A205 and B206 on the rear side and the purlin frame A203 form a downward stable triangular structure, thereby providing the two purlin frames A203 on the rear side with a force to resist negative pressure and prevent the two purlin frames A203 on the rear side from bending upward under the action of negative pressure.

[0026] When a strong wind flows from back to front, the two rear adjusting plates 501 are impacted by the strong wind, causing their corresponding drive racks 502 to abut against the inner wall of the purlin frame A203. The drive racks 502 stabilize the two rear adjusting plates 501 via L-shaped rods. The two front adjusting plates 501 are blown forward by the strong wind along their corresponding U-shaped frames A201. The adjusting plates 501 drive their corresponding L-shaped rods to slide forward along the through slots of the U-shaped frames A201. The L-shaped rods then drive their corresponding drive racks 502 to elastically contract and slide along the purlin frame A203. The drive racks 502... The drive gear 503 rotates, and the axle of the drive gear 503 drives the turntable A204 to rotate. The turntable A204 drives the turntable B207 to rotate 180 degrees through the support bars A205 and B206. Subsequently, the four vertical plates A202 are blown by strong winds and elastically contract and slide forward along the slide groove A of the roof panel 101, which in turn drives the U-shaped frame A201 to slide forward. The U-shaped frame A201 drives the extrusion plate A302 to move forward, and through the elastic telescopic rod A401, it drives the limiting block A402 to move forward. The limiting block A402 extends into the purlin frame A203, and the extrusion plate... A302 presses against the convex shaft A on slider A301 through groove A. The convex shaft A, under pressure, causes slider A301 to elastically contract and slide. Slider A301, via turntable B207, drives support bar B206 to move, which in turn drives support bar A205 to move. Subsequently, slider A301 contacts and presses against the wedge-shaped surface of limiting block A402. Limiting block A402, under pressure, causes elastic telescopic rod A401 to elastically contract until limiting block A402 aligns with the slot A of slider A301. Then, elastic telescopic rod A401 elastically extends and causes limiting block A402 to slide and engage. The slider A301 is limited in groove A. The support bars A205 and B206 on the rear side form an upward stable triangular structure with the purlin frame A203, thereby providing a force against positive pressure to the two rear purlin frames A203 and preventing them from bending downward under positive pressure. At the same time, the support bars A205 and B206 on the front side form a downward stable triangular structure with the purlin frame A203, thereby providing a force against negative pressure to the two front purlin frames A203 and preventing them from bending downward under negative pressure.

[0027] like Figure 8 and Figure 9As shown, it also includes a second support mechanism, which includes two sets of U-shaped frames B601 that are slidably installed in the roof panel 101 in the front-back direction, with two in each set. The two sets of U-shaped frames B601 are located between the two sets of U-shaped frames A201 and are arranged opposite each other. Two sets of sliding grooves B are opened through the roof panel 101, with two in each set and arranged opposite each other. Vertical plates B602 that are fixedly installed on the U-shaped frames B601 are slidably installed in the sliding grooves B. Two sets of purlin frames B603 are fixedly installed in the steel structure 1, with two in each set and arranged opposite each other. The purlin frames B603 are located on the lower side of the corresponding U-shaped frames B601. A support bar C604 is hinged in the purlin frame B603, and a support bar D605 is hinged on the support bar C604.

[0028] like Figure 10 and Figure 11 As shown, the second support mechanism also includes a slider B701 that is elastically slidably installed in the purlin frame B603. The support bar D605 is hinged to the slider B701. An extrusion plate B702 is fixedly installed on the inner wall of the U-shaped frame B601 near the slider B701. A convex shaft B is fixedly installed at the bottom of the slider B701. A groove B that cooperates with the convex shaft B is opened on one side of the extrusion plate B702. When the extrusion plate B702 moves, it can make the slider B701 move by cooperating with the convex shaft B. A second limiting component is installed on the U-shaped frame B601.

[0029] like Figure 10 and Figure 11 As shown, the second limiting component includes a pair of elastic telescopic rods B801 installed on the inner wall of the U-shaped frame B601. A limiting block B802 is fixedly installed at the telescopic end of the elastic telescopic rod B801. The limiting block B802 is slidably installed on the purlin frame B603. A pair of slots B that cooperate with the limiting block B802 are provided on the front and rear sides of the slider B701. When the limiting block B802 is inserted into the slot B, it can limit the slider B701.

[0030] Initially, both support bars C604 and D605 retract into their corresponding purlin frames B603 to reduce volume and facilitate installation during factory construction. When strong winds flow from front to back or from back to front, the vertical plate B602 slides along the groove B of the roof panel 101 due to the impact of the strong winds, causing the U-shaped frame B601 to slide along the roof panel 101. The U-shaped frame B601 drives the pressing plate B702 to move, and through the elastic telescopic rod B801, it drives the limiting block B802 to move. The limiting block B802 extends into the purlin frame B603, and the pressing plate B702 presses against the convex shaft B on the slider B701 through its groove B. The convex shaft B, under force, causes the slider B701 to elastically contract. Sliding, slider B701 drives support bar D605 to move, support bar D605 drives support bar C604 to move, then slider B701 contacts and presses against the wedge-shaped surface of limiting block B802, limiting block B802 is forced to cause elastic telescopic rod B801 to elastically contract until limiting block B802 is aligned with the slot B of slider B701, elastic telescopic rod B801 elastically extends and drives limiting block B802 to slide into slot B to limit slider B701. Support bar C604, support bar D605 and purlin frame B603 form a downward stable triangular structure, which in turn provides purlin frame B603 with a force to resist negative pressure and prevent purlin frame B603 from bending upward under the action of negative pressure.

[0031] like Figure 12 and Figure 13 As shown, it also includes a reinforcing mechanism, which includes three sets of lifting rods 901 that slide vertically through and are installed on the roof panel 101. Each set consists of two rods, which are arranged opposite each other on the left and right. A swing plate 902 is hinged to the top of the lifting rod 901. A pull-down assembly 903 is connected to the lifting rod 901. The pull-down assembly 903 consists of a transmission rack, a transmission gear, and a swing arm. The transmission rack is fixedly installed at the bottom end of the lifting rod 901. The transmission gear is rotatably installed on the column of the factory structure (the column is existing technology and is not shown in the figure, so it will not be described here). The swing arm is fixedly installed at the end of the transmission gear and is hinged to the steel structure 1.

[0032] like Figure 12 and Figure 13 As shown, it also includes a horizontal plate 1001 fixedly installed on the top of the swing plate 902. When a strong wind impacts the horizontal plate 1001, the horizontal plate 1001 can drive the swing plate 902 to swing with the wind.

[0033] like Figure 13 As shown, it also includes a rectangular frame 1101 that is elastically slidably installed on the upper part of the outer wall of the lifting rod 901 in the horizontal direction. A pair of support rods 1102 that cooperate with the swing plate 902 are hinged inside the rectangular frame 1101. The support rods 1102 are used to provide support for the swing plate 902.

[0034] Initially, the swing plate 902 is in a horizontal state. When a strong wind flows from front to back, the horizontal plate 1001 is impacted by the strong wind, causing the swing plate 902 to rotate backward. The impact of the strong wind provides lift to the bottom of the swing plate 902. The swing plate 902, under this force, causes the lifting rod 901 to rise. The lifting rod 901 causes the transmission rack in the pull-down assembly 903 to rise. The transmission rack drives the transmission gear to rotate, and the transmission gear causes the swing arm to swing downward, so that the swing arm applies a downward pull force to the steel structure 1. The greater the lift provided by the strong wind to the swing plate 902, the greater the pull force of the swing arm on the steel structure 1. The greater the downward force applied by structure 1, the more the rectangular frame 1101 is blown by the strong wind and elastically contracts and slides backward along the outer wall of the lifting rod 901, driving the two support rods 1102 inside to move. The front support rod 1102 is squeezed upward by the outer wall of the lifting rod 901 and elastically contracts and rotates, while the rear support rod 1102 elastically releases and rotates downward. Subsequently, the front support rod 1102 contacts the bottom of the swing plate 902, providing support for the swing plate 902 and preventing the swing plate 902 from swinging arbitrarily when impacted by strong wind, which would prevent the swing plate 902 from receiving stable lift.

[0035] When a strong wind flows from back to front, the horizontal plate 1001 is impacted by the strong wind, causing the swing plate 902 to rotate forward. The strong wind impact provides lift to the bottom of the swing plate 902, which in turn causes the swing rod to exert a downward pull on the steel structure 1. At the same time, the rectangular frame 1101 is blown by the strong wind and extends forward elastically along the outer wall of the lifting rod 901, which drives the two support rods 1102 inside to move. The rear support rod 1102 is squeezed upward by the outer wall of the lifting rod 901 and rotates elastically, while the front support rod 1102 is released elastically and rotates downward. The rear support rod 1102 contacts the bottom of the swing plate 902, providing support for the swing plate 902 and preventing the swing plate 902 from swinging arbitrarily when impacted by the strong wind, which would cause the swing plate 902 to be unable to receive stable lift.

[0036] When the strong wind subsides, it no longer impacts the vertical plate A202 and the adjusting plate 501. The vertical plate A202 elastically releases or retracts to its sliding reset, driving the U-shaped frame A201 to move and reset. The U-shaped frame A201, through the elastic telescopic rod A401, drives the limiting block A402 to move and reset. The limiting block A402 disengages from the slot A of the slider A301, and the slider A301 releases its restraint and slides to its reset. It then drives the support bar B206 to move through the turntable B207. The support bar B206 drives... When support bar A205 moves, it retracts into the purlin frame A203 along with support bar B206. Subsequently, the rack 502 is elastically released and slides back to its original position, driving the L-shaped rod to move and the drive gear 503 to rotate. The L-shaped rod drives the adjusting plate 501 to move and reset, and the drive gear 503 drives the turntable A204 to rotate in reverse. The turntable A204, through support bars A205 and B206, drives the turntable B207 to rotate 180 degrees, thus resetting the first support mechanism.

[0037] Through the cooperation of the first support mechanism, the second support mechanism, and the reinforcing mechanism, a stable supporting force can be provided for the roof structure when strong winds pass over the factory roof, preventing damage to the roof structure.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wind-pressure resistant metal roof structure for a hydropower station powerhouse, comprising a steel structure on which a roof panel is installed, characterized in that: It also includes a first support mechanism, which includes two sets of U-shaped frames A slidably installed in the roof panel. Two sets of sliding grooves A are opened through the roof panel. Vertical plates A are elastically slidably installed in the sliding grooves A and fixedly installed on the U-shaped frames A. Two sets of purlin frames A are fixedly installed in the steel structure. A turntable A is rotatably installed in the purlin frame A. A support bar A is hinged to the turntable A. A support bar B is hinged to the end of the support bar A away from the turntable A. A turntable B is hinged to the end of the support bar B away from the support bar A. A switching mechanism for changing the direction of the support bar A and the support bar B is installed in the purlin frame A. The first support mechanism also includes a slider A that is elastically slidably installed in the purlin frame A, a turntable B that is rotatably installed on the slider A, an extrusion plate A that is fixedly installed in the U-shaped frame A, a convex shaft A that is fixedly installed on the slider A, a groove A that cooperates with the convex shaft A on the extrusion plate A, and a first limiting component installed on the U-shaped frame A; The first limiting component includes a pair of elastic telescopic rods A mounted on the U-shaped frame A. The telescopic ends of the elastic telescopic rods A are fixedly mounted with limiting blocks A. The limiting blocks A are slidably mounted on the purlin frame A. The slider A has a pair of slots A that cooperate with the limiting blocks A. The switching mechanism includes an adjusting plate slidably mounted on the U-shaped frame A. A through slot is provided on the U-shaped frame A. An L-shaped rod located in the through slot is fixedly mounted on the adjusting plate. A drive rack is fixedly mounted on the L-shaped rod. The drive rack is slidably mounted in the purlin frame A. A drive gear that meshes with the drive rack is rotatably mounted in the purlin frame A. The axle of the drive gear is fixedly connected to the turntable A. Both support bars A and B retract into their corresponding purlin frame A, forming an upward-facing triangular structure with purlin frame A. When strong winds flow from front to back, because the elastic force of the drive rack is less than that of the vertical plate A, when the two front adjusting plates are impacted by the strong wind, their corresponding drive racks abut against the inner wall of purlin frame A. The drive racks stabilize the two front adjusting plates via the L-shaped rods. The two rear adjusting plates are blown by the strong winds and slide backward along their corresponding U-shaped frames A. The adjusting plates drive the corresponding L-shaped rods along... As the U-shaped frame A slides backward through the through slot, the L-shaped rod drives the corresponding drive rack to elastically contract and slide along the purlin frame A. The drive rack drives the drive gear to rotate, and the axle of the drive gear drives the turntable A to rotate. The turntable A, through supports A and B, drives the turntable B to rotate 180 degrees. The internal space of the purlin frame A is sufficient for supports A and B to rotate. Subsequently, the four vertical plates A, blown by strong winds, elastically extend and slide backward along the sliding groove A of the roof panel, causing the U-shaped frame A to slide backward. The U-shaped frame A then drives the pressing plate A backward. The movement, via the elastic telescopic rod A, causes the limiting block A to move backward, extending into the purlin frame A. The pressing plate A, through its groove A, presses against the convex shaft A on the slider A. The convex shaft A, under force, causes the slider A to elastically contract and slide. The slider A, through the turntable B, drives the support bar B to move, and the support bar B drives the support bar A to move. Subsequently, the slider A contacts and presses against the wedge-shaped surface of the limiting block A. The limiting block A, under force, causes the elastic telescopic rod A to elastically contract until the limiting block A aligns with the slot A of the slider A. The elastic telescopic rod A then elastically extends... The extension and movement of the limiting block A into the slot A limits the slider A. The front support bars A and B, together with the purlin frame A, form an upward-facing stable triangular structure, thereby providing a force against positive pressure to the two front purlin frames A and preventing them from bending downwards under positive pressure. At the same time, the rear support bars A and B, together with the purlin frame A, form a downward-facing stable triangular structure, thereby providing a force against negative pressure to the two rear purlin frames A and preventing them from bending upwards under negative pressure.

2. The wind-pressure resistant metal roof structure for a hydropower station powerhouse according to claim 1, characterized in that: It also includes a second support mechanism, which includes two sets of U-shaped frames B that are slidably installed on the roof panel. Two sets of sliding grooves B are opened through the roof panel. Vertical plates B that are fixedly installed on the U-shaped frames B are slidably installed in the sliding grooves B. Two sets of purlin frames B are fixedly installed on the steel structure. Support bars C are hinged in the purlin frames B. Support bars D are hinged on the support bars C. The second support mechanism also includes a slider B that is elastically slidably installed in the purlin frame B, the support bar D is hinged to the slider B, an extrusion plate B is fixedly installed on the U-shaped frame B through a connecting plate, a convex shaft B is fixedly installed at the bottom of the slider B, a groove B that cooperates with the convex shaft B is provided on the extrusion plate B, and a second limiting component is installed on the U-shaped frame B. The second limiting component includes a pair of elastic telescopic rods B mounted on the U-shaped frame B. A limiting block B is fixedly mounted on the telescopic end of the elastic telescopic rod B. The limiting block B is slidably mounted on the purlin frame B. A pair of slots B that cooperate with the limiting block B are provided on the slider B. Initially, supports C and D are both retracted within their corresponding purlin frames B. When strong winds flow from front to back or from back to front, the vertical plate B, impacted by the strong winds, slides along the groove B of the roof panel, causing the U-shaped frame B to slide along the roof panel. The U-shaped frame B drives the compression plate B to move, and through the elastic telescopic rod B, it drives the limiting block B to move. The limiting block B extends into the purlin frame B, and the compression plate B, through its groove B, presses against the convex shaft B on the slider B. The convex shaft B, under force, causes the slider B to elastically contract and slide. B drives the movement of support D, which in turn drives the movement of support C. Subsequently, slider B contacts and presses against the wedge-shaped surface of limiting block B. Under the force, limiting block B causes elastic telescopic rod B to contract elastically until limiting block B aligns with the slot B of slider B. Elastic telescopic rod B then extends elastically and causes limiting block B to slide into slot B, limiting slider B. Supports C and D, along with purlin frame B, form a downward-facing stable triangular structure, thereby providing purlin frame B with a force to resist negative pressure and preventing purlin frame B from bending upward under the action of negative pressure.

3. The wind-pressure resistant metal roof structure for a hydropower station powerhouse according to claim 2, characterized in that: It also includes a reinforcing mechanism, which includes three sets of lifting rods that are slidably mounted through the roof panel. A swing plate is hinged to the lifting rod, and a pull-down assembly is connected to the lifting rod. The pull-down assembly is connected to the steel structure. It also includes a horizontal plate that is fixedly installed on the swing plate; It also includes a rectangular frame that is elastically slidably mounted on the lifting rod in the horizontal direction, and a pair of support rods that cooperate with the swing plate are hinged inside the rectangular frame; Initially, the swing plate is horizontal. When a strong wind flows from front to back, the horizontal plate is impacted by the wind, causing the swing plate to rotate backward. The impact of the strong wind provides lift to the bottom of the swing plate, which in turn causes the lifting rod to rise. The lifting rod then causes the transmission rack in the pull-down assembly to rise, which in turn causes the transmission gear to rotate. The transmission gear causes the swing arm to swing downward, applying a downward force to the steel structure. The greater the lift provided by the strong wind to the swing plate, the greater the downward force applied by the swing arm to the steel structure. At the same time, the rectangular frame is blown by the strong wind and elastically contracts and slides backward along the outer wall of the lifting rod, causing the two support rods inside to move. The front support rod is squeezed upward by the outer wall of the lifting rod and elastically contracts and rotates, while the rear support rod elastically releases and rotates downward. Subsequently, the front support rod contacts the bottom of the swing plate, providing support for the swing plate and preventing it from swinging arbitrarily when impacted by strong winds.

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