Self-pressing type trash rack supporting structure

Abstract

The utility model provides a self-pressing type trash rack supporting structure. The self-pressing type trash rack supporting structure comprises a rack groove positioning supporting block and a rack blade movable supporting unit. The grid groove positioning supporting block is arranged at the position, close to the sill, of the grid groove; the grid blade movable supporting units are installed on the side faces of the upstream sides or the downstream sides of the positions, embedded into the grid grooves, of the grid blades of each section of the trash rack. According to the self-pressing type trash rack supporting structure provided by the utility model, the self weight of the trash rack blades is utilized to ensure that the trash rack blades are tightly supported with the upstream side and the downstream side of the rack groove after the trash rack blades fall down in place, so that harmful vibration generated when the trash rack bears bidirectional water flow is prevented; in the lifting process of the grid blades, gaps are automatically generated between the grid blades and the upstream and downstream sides of the grid grooves so as to reduce the opening and closing force for lifting the trash rack. Compared with a conventional common supporting structure, the supporting structure can greatly reduce the precision control requirements on manufacturing and mounting of the grid blades and the grid grooves of the trash rack of the pumped storage power station, is convenient to operate, safe, reliable and low in manufacturing cost, and can be widely applied to the trash rack of the pumped storage power station.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal structure design in a pumped storage power station project, and specifically relates to a self-pressurized trash rack supporting structure. Background Art

[0002] Pumped storage power stations are in two working conditions of pumping and power generation all year round, and the direction of the water flow changes alternately. Therefore, the trash racks are subjected to the bidirectional water flow under the two working conditions of pumping and power generation for a long time, which is the biggest difference from the design of trash racks in conventional hydropower stations. When designing trash racks in conventional hydropower stations, there is usually a certain gap between the upstream side of the grating blades and the grating grooves. However, if the trash racks of pumped storage power stations adopt the same design, they are easy to produce harmful vibrations and then be damaged under the action of bidirectional water flow. Therefore, it is crucial to adopt a suitable supporting structure to ensure the close support between the grating blades and the grating grooves of pumped storage power stations for the normal use of trash racks.

[0003] At present, there are mainly three types of supporting structures for trash racks in pumped storage power stations:

[0004] The first type uses an elastic preloaded support structure, that is, a rubber pad with a certain elasticity is usually arranged between the supporting slider and the grating structure. When the rubber pad is in the free state, the overall thickness of the grating is slightly larger than the width of the grating slot, ensuring a certain preload of the rubber pad. After the grating enters the grating slot, the weight of the grating is used to compress the rubber pad, so that the grating and the upstream and downstream of the grating slot are tightly supported. Compared with the trash racks of conventional hydropower stations, this elastic preloaded support structure requires a very high matching accuracy during the manufacturing and installation of the grating slot and the grating. After actual manufacturing and installation, a slightly too large preload will cause the grating to be unable to fall to the bottom of the orifice. When the preload is slightly too small or a gap appears, the trash rack is prone to harmful vibrations in its working state. In addition, the rubber pad is prone to lose part or all of its elastic supporting function due to aging when it is underwater for a long time, which leads to support failure.

[0005] The second type uses a supporting structure with a wedge-shaped grating groove and a wedge-shaped slider, that is, the width of the grating groove and the thickness of the grating blade slider are both wedge-shaped with a small bottom and a large top, with a certain slope in the vertical direction, so that the trash rack blades have a certain gap in the upper part of the grating groove, and when the grating blades fall into place, they are tightly supported between the grating blades and the grating groove. This supporting structure requires higher matching accuracy during the manufacturing and installation of the grating groove and the grating blades, greatly increasing the difficulty of manufacturing and installing the equipment.

[0006] The third method is to add a screw tightener between the fence blade and the fence groove. After the fence blade falls to the bottom of the fence groove, the screw tightener is manually tightened to ensure the close support between the fence blade and the fence groove. When lifting the fence blade, the screw tightener needs to be manually loosened. However, the trash rack is usually underwater in the later stage, so underwater manual operation is required, which makes the operation very inconvenient. Utility Model Content

[0007] In view of the defects in the prior art, the utility model provides a self-pressurized trash rack supporting structure, which can effectively solve the above problems.

[0008] The technical solution adopted by the utility model is as follows:

[0009] The utility model provides a self-pressurized trash rack support structure, comprising a trash rack groove positioning support block (1) and a trash rack blade movable support unit (2); the trash rack groove positioning support block (1) is arranged at a position close to the bottom sill of the trash rack groove (3); the trash rack blade movable support unit (2) is installed on the side surface of each trash rack blade (4) at the upstream side or the downstream side of the position embedded in the trash rack groove (3); the trash rack blade movable support unit (2) comprises a first movable support device (21), an intermediate guide device (22), a second movable support device (23) and a top guide frame (24); the first movable support device (21), the intermediate guide device (22), the second movable support device (23) and the top guide frame (24) are coaxially installed in sequence on the side surface of the trash rack blade (4) from bottom to top;

[0010] The trough positioning support block (1) acts on the first movable support device (21) of the trash rack blade (4) at the bottom section, so that the first movable support device (21) and the trough (3) are tightly supported; the first movable support device (21) acts on the second movable support device (23) through the intermediate guide device (22), so that the second movable support device (23) and the trough (3) are tightly supported; the top guide frame (24) acts on the first movable support device (21) of the trash rack blade (4) at the upper section, so that the first movable support device (21) and the trough (3) are tightly supported.

[0011] Preferably, the gate groove positioning support block (1) has an upward protruding structure.

[0012] Preferably, the first movable supporting device (21) and the second movable supporting device (23) have the same structure, and both comprise: a movable slider (A1), a base (A2) and an anti-shear block (A3); the base (A2) is fixedly mounted on the side of the trash rack blade (4), and the anti-shear block (A3) is fixedly mounted between the top of the base (A2) and the side of the trash rack blade (4); the movable slider (A1) is slidably mounted on the end surface of the base (A2) facing the side wall of the grille groove (3), the contact surface between the movable slider (A1) and the base (A2) is an inclined surface, and the movable slider (A1) slides in an up-and-down direction relative to the base (A2), so that the side of the movable slider (A1) away from the inclined surface presses against or leaves the side wall of the grille groove (3).

[0013] Preferably, the intermediate guide device (22) comprises a guide rod (221) and a guide seat (222); a plurality of the guide seats (222) are fixedly mounted on the side surface of the trash rack blade (4) in a vertical direction; and the guide rod (221) passes through the guide holes of each of the guide seats (222), so that the guide rod (221) can slide up and down along the guide holes.

[0014] Preferably, the intermediate guide device (22) further comprises an elastic element (223); and the elastic element (223) is fixedly mounted on the top end of the guide rod (221).

[0015] Preferably, the elastic element (223) is a compressible rubber block.

[0016] Preferably, the top guide frame (24) has an upward protrusion.

[0017] Preferably, the trash rack blade (4) has multiple sections, and the upper and lower adjacent trash rack blades (4) are connected via an oblong hole pin (5).

[0018] The self-pressurized trash rack support structure provided by the utility model has the following advantages:

[0019] The self-pressurized trash rack support structure provided by the utility model can automatically ensure that the trash rack blades and the upstream and downstream sides of the rack groove are tightly supported after the trash rack blades fall into place by utilizing the deadweight of the trash rack blades, so as to prevent the trash rack from generating harmful vibrations when it is subjected to bidirectional water flow; during the process of lifting the blades, gaps are automatically generated between the blades and the upstream and downstream sides of the rack groove to reduce the opening and closing force of the hoisting trash rack. Compared with the commonly used support structures in the past, the support structure can greatly reduce the precision control requirements for the manufacture and installation of the trash rack blades and the rack grooves of the pumped storage power station, and is easy to operate, safe and reliable, and low in cost, and can be widely used on the trash racks of pumped storage power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an elevation view of the single-section self-pressurized trash rack support structure provided by the utility model;

[0021] Figure 2 It is a structural schematic diagram of the movable supporting device provided by the utility model;

[0022] Figure 3 It is a structural schematic diagram of the intermediate guide device provided by the utility model;

[0023] Figure 4 The utility model is a schematic diagram of the connection between the sections when the trash rack is divided into multiple sections and hoisted as a whole. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] The utility model provides a self-pressurized trash rack supporting structure, which is a simple and reliable trash rack supporting structure. The trash rack blades can automatically ensure that the trash rack blades and the upstream and downstream sides of the trash rack groove are tightly supported after the trash rack blades fall into place by utilizing the deadweight of the trash rack blades, so as to prevent the trash rack from generating harmful vibration when it is subjected to bidirectional water flow; during the process of lifting the trash rack blades, a certain gap is automatically generated between the trash rack blades and the upstream and downstream sides of the trash rack groove to reduce the opening and closing force.

[0026] See also Figure 1 to Figure 4 The utility model provides a self-pressurized trash rack support structure, comprising a rack slot positioning support block 1 and a rack blade movable support unit 2;

[0027] A gate groove positioning support block 1 is arranged near the bottom sill of the gate groove 3 ; the gate groove positioning support block 1 has an upwardly protruding structure, and in specific implementation, the gate groove positioning support block 1 can be arranged on an embedded part of the gate groove 3 .

[0028] A blade movable support unit 2 is installed on the side surface of each trash rack blade 4 at the upstream side or the downstream side of the position where the trash rack blade 4 is embedded in the trash rack groove 3; the blade movable support unit 2 includes a first movable support device 21, an intermediate guide device 22, a second movable support device 23 and a top guide frame 24; the first movable support device 21, the intermediate guide device 22, the second movable support device 23 and the top guide frame 24 are installed coaxially in sequence from bottom to top on the side surface of the trash rack blade 4;

[0029] The trough positioning support block 1 acts on the first movable supporting device 21 of the trash rack blade 4 of the bottom section, so that the first movable supporting device 21 and the trough 3 are tightly supported; the first movable supporting device 21 acts on the second movable supporting device 23 through the intermediate guide device 22, so that the second movable supporting device 23 and the trough 3 are tightly supported; the top guide frame 24 acts on the first movable supporting device 21 of the trash rack blade 4 of the upper section, so that the first movable supporting device 21 and the trough 3 are tightly supported.

[0030] As a specific structure, see Figure 2The first movable supporting device 21 and the second movable supporting device 23 have the same structure, and both include: a movable slider A1, a base A2 and a shear block A3; the base A2 is fixedly installed on the side of the trash rack blade 4, for example, the base A2 is fixed to the side of the trash rack blade 4 by a fastener; the shear block A3 is fixedly installed between the top of the base A2 and the side of the trash rack blade 4, and the strength and reliability of the base A2 during use are improved by the shear block A3; the movable slider A1 is slidably installed on the end surface of the base A2 facing the side wall of the grid groove 3, the movable slider A1 is made of a polymer composite material, and the contact surface between the movable slider A1 and the base A2 is an inclined surface. The movable slider A1 slides up and down relative to the base A2 along the inclined surface in contact with the base A2 within a certain range, so that the side of the movable slider A1 away from the inclined surface is pressed against or leaves the side wall of the grid groove 3.

[0031] As a specific structure, see Figure 3 The intermediate guide device 22 includes a guide rod 221 and a guide seat 222; the side of the trash rack blade 4 can be fixedly installed with multiple guide seats 222 in the vertical direction by fasteners; the guide rod 221 passes through the guide holes of each guide seat 222, so that the guide rod 221 can slide up and down along the guide hole. The intermediate guide device 22 also includes an elastic element 223; the elastic element 223 is fixedly installed at the top of the guide rod 221, and the elastic element 223 is a compressible rubber block.

[0032] The top guide frame 24 has an upward protrusion.

[0033] As a specific structure, see Figure 4 When the trash rack blade 4 is multi-section and hoisted as a whole, the upper and lower adjacent trash rack blades 4 are connected by the oblong hole pin 5.

[0034] In practical applications, the left and right ends of the trash rack blade 4 are respectively embedded in the rack groove 3. Therefore, the self-pressurized trash rack support structure provided by the present application is installed between each end of the trash rack blade 4 and the rack groove 3, and the self-pressurized trash rack support structures at both ends are installed symmetrically.

[0035] The self-pressurized trash rack support structure provided by the utility model has the following usage method and principle:

[0036] (1) When the trash rack falls to the bottom of the rack groove 3, the lower end of the movable slider A1 in the first movable supporting device 21 at the bottom of the trash rack blade 4 of the bottom section will touch the rack groove positioning support block 1 on the rack groove 3. The trash rack blade 4 continues to fall and pushes the movable slider A1 in the first movable supporting device 21 to move upward until the first movable supporting device 21 at the bottom is tightly supported by the rack groove 3.

[0037] When the movable slider A1 in the first movable supporting device 21 of the trash rack blade 4 of the bottom section moves upward relatively, it will push the guide rod 221 in the middle guide device 22 to move upward, thereby causing the movable slider A1 in the second movable supporting device 23 at the top to move upward relatively until the second movable supporting device 23 is also tightly supported by the rack groove 3.

[0038] After the trash rack blade 4 of the bottom section is in place and tightly supported by the rack groove 3, the trash rack blade 4 of the upper section continues to fall under the action of its own weight, which will cause the lower end of the movable slider A1 in the first movable supporting device 21 at the bottom of the blade to touch the top guide frame 24 at the top of the lower trash rack blade 4, until the first movable supporting device 21 in the trash rack blade 4 of the upper section is also tightly supported by the rack groove 3. In this way, the installation of multiple sections of the trash rack blade 4 is realized, and the movable supporting devices at the upper and lower ends of each trash rack blade 4 are tightly supported by the rack groove 3.

[0039] (2) When the trash rack blades 4 are lifted, the movable slide blocks of the movable supporting devices at both ends move downward relatively, so that a certain gap is automatically generated between the trash rack blades 4 and the upstream and downstream sides of the rack groove 3 to reduce the opening and closing force.

[0040] The self-pressurized trash rack support structure provided by the utility model has the following advantages:

[0041] The self-pressurized trash rack support structure provided by the utility model can automatically ensure that the trash rack blades and the upstream and downstream sides of the rack groove are tightly supported after the trash rack blades fall into place by utilizing the deadweight of the trash rack blades, so as to prevent the trash rack from generating harmful vibrations when it is subjected to bidirectional water flow; during the process of lifting the blades, gaps are automatically generated between the blades and the upstream and downstream sides of the rack groove to reduce the opening and closing force of the hoisting trash rack. Compared with the commonly used support structures in the past, the support structure can greatly reduce the precision control requirements for the manufacture and installation of the trash rack blades and the rack grooves of the pumped storage power station, and is easy to operate, safe and reliable, and low in cost, and can be widely used on the trash racks of pumped storage power stations.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A self-pressurized trash rack support structure, characterized in that: The invention comprises a trough positioning support block (1) and a trough blade movable support unit (2); the trough positioning support block (1) is arranged at a position close to the bottom sill of the trough (3); the trough blade movable support unit (2) is installed on the side surface of each section of the trash rack trough blade (4) at the upstream side or the downstream side of the position embedded in the trough (3); the trough blade movable support unit (2) comprises a first movable support device (21), an intermediate guide device (22), a second movable support device (23) and a top guide frame (24); the first movable support device (21), the intermediate guide device (22), the second movable support device (23) and the top guide frame (24) are coaxially installed in sequence on the side surface of the trash rack trough blade (4) from bottom to top; The trough positioning support block (1) acts on the first movable support device (21) of the trash rack blade (4) at the bottom section, so that the first movable support device (21) and the trough (3) are tightly supported; the first movable support device (21) acts on the second movable support device (23) through the intermediate guide device (22), so that the second movable support device (23) and the trough (3) are tightly supported; the top guide frame (24) acts on the first movable support device (21) of the trash rack blade (4) at the upper section, so that the first movable support device (21) and the trough (3) are tightly supported.

2. A self-pressurized trash rack support structure according to claim 1, characterized in that: The gate groove positioning support block (1) has an upward convex structure.

3. A self-pressurized trash rack support structure according to claim 1, characterized in that: The first movable supporting device (21) and the second movable supporting device (23) have the same structure, and both comprise: a movable slider (A1), a base (A2) and an anti-shear block (A3); the base (A2) is fixedly mounted on the side of the trash rack blade (4), and the anti-shear block (A3) is fixedly mounted between the top of the base (A2) and the side of the trash rack blade (4); the movable slider (A1) is slidably mounted on the end surface of the base (A2) facing the side wall of the grille groove (3), the contact surface between the movable slider (A1) and the base (A2) is an inclined surface, and the movable slider (A1) slides in an up-and-down direction relative to the base (A2), so that the side of the movable slider (A1) away from the inclined surface presses against or leaves the side wall of the grille groove (3).

4. A self-pressurized trash rack support structure according to claim 1, characterized in that: The intermediate guide device (22) comprises a guide rod (221) and a guide seat (222); a plurality of the guide seats (222) are fixedly mounted on the side surface of the trash rack blade (4) in a vertical direction; the guide rod (221) passes through the guide holes of each of the guide seats (222), so that the guide rod (221) can slide up and down along the guide holes.

5. A self-pressurized trash rack support structure according to claim 4, characterized in that: The intermediate guide device (22) further comprises an elastic element (223); the elastic element (223) is fixedly mounted on the top end of the guide rod (221).

6. A self-pressurized trash rack support structure according to claim 5, characterized in that: The elastic element (223) is a compressible rubber block.

7. A self-pressurized trash rack support structure according to claim 1, characterized in that: The top guide frame (24) has an upward protrusion.

8. The self-pressurized trash rack support structure according to claim 1, characterized in that: The trash rack blade (4) is composed of multiple sections, and the upper and lower adjacent trash rack blades (4) are connected via an oblong hole pin shaft (5).

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