Test water tank longitudinal gradient adjusting system

Abstract

The utility model discloses a longitudinal gradient adjusting system for a test water tank, which is characterized by comprising a supporting seat positioned in the middle of the lower surface of a supporting bottom plate of the test water tank, and the middle of the supporting bottom plate is hinged and mounted on the supporting seat in a front-back rotating manner; supporting adjusting mechanisms capable of achieving height linkage adjustment are further downwards installed on the lower surfaces of the front end and the rear end of the supporting bottom plate. The utility model has the advantages that the longitudinal gradient adjustment of the water tank can be conveniently and quickly realized, and the related scientific research and teaching efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of water tank testing technology, specifically to a longitudinal slope adjustment system for a test water tank. Background Technology

[0002] River engineering model testing is a research method based on the principle of similarity, which involves creating a scaled-down model of a natural river or hydraulic engineering project to simulate and study river water and sediment behavior and engineering problems in a laboratory. A test flume is a specialized facility used to reveal the characteristics of water and sediment movement and the laws governing riverbed evolution, and is widely used in water and sediment science research and teaching river engineering model testing. However, existing test flumes, especially river engineering model test flume equipment, typically have the following drawbacks: During flume testing, if longitudinal gradient adjustments are needed, it is necessary to recast the flume bottom material or change the flume bottom slope by piling up sediment, which is time-consuming, labor-intensive, and extremely inconvenient. Utility Model Content

[0003] To address the aforementioned shortcomings, the technical problem to be solved by this utility model is: how to provide a test water tank longitudinal slope adjustment system that can conveniently and quickly adjust the longitudinal slope of the test water tank.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution, wherein the orientation is described with the direction of water flow as the front and the opposite direction as the rear.

[0005] A longitudinal slope adjustment system for a test water tank is characterized by comprising a support base located at the center of the lower surface of a support base plate of the test water tank, the center of the support base plate being hinged to the support base in a rotatable manner, and a support adjustment mechanism capable of achieving height linkage adjustment being installed downward on the lower surfaces of the front and rear ends of the support base plate.

[0006] In this way, the middle of the support base plate is hinged to the support support to form a lever structure. The height of the front and rear ends of the support base plate can be adjusted through the support adjustment mechanism. Therefore, the longitudinal slope of the water tank can be directly adjusted without changing the shape of the water tank module, so as to meet the specific test requirements. This is very convenient and quick.

[0007] Furthermore, the support adjustment mechanism includes two piston grooves located below the front and rear ends of the support base plate. The upper ends of the two piston grooves are open and a piston that can slide up and down is horizontally arranged inside them. A support rod is vertically arranged at the upper end of the piston. The upper end of the support rod is rotatably hinged to the lower surface of the support base plate through a hinge shaft. The piston groove below the piston is filled with hydraulic fluid. The bottoms of the two piston grooves are connected to each other through a horizontally arranged connecting pipe. A switch valve and a hydraulic pump with forward and reverse rotation control function are installed on the connecting pipe.

[0008] In this way, when the longitudinal drop of the water tank needs to be adjusted, the switch valve can be opened, and then the hydraulic pump can be turned on. Controlling the hydraulic pump to rotate forward or backward allows for the left-right adjustment of the hydraulic fluid in the two piston slots. The cross-sectional area of ​​the piston slots is set such that when one piston slot is filled with fluid and the piston is pushed upward, the distance the other piston is pressed down is exactly the height by which the fluid level in that piston slot decreases (this can be calculated beforehand). Thus, by controlling the forward and reverse rotation of the hydraulic pump, the longitudinal drop of the support base plate can be adjusted. This design is not only simple and easy to control, but also ensures that the weight of the water tank, acting on the hydraulic fluid through the pistons at both ends, is mutually canceled out at the switch valve position via the connecting pipe. Therefore, the left-right pressure difference on the switch valve in the connecting pipe is very small, greatly ensuring the stability of the system and the reliability of the adjustment. Of course, in practice, the support adjustment mechanism can also be implemented by directly setting a height telescopic adjustment mechanism downward on each side of the support base plate. However, in this case, the height telescopic adjustment mechanism would be subjected to the heavy pressure of the water tank for a long time during water tank testing, which could easily lead to instability and damage, resulting in a shorter service life and poor stability.

[0009] Furthermore, a downward-facing hinge seat is fixedly installed on the lower surface of each of the front and rear ends of the support base plate. The hinge seat is provided with an arc-shaped hinge hole that engages with the hinge pin at the upper end of the support rod.

[0010] In this way, during the up-and-down rotation of the front and rear ends of the support base plate, the hinge shaft can have a matching clearance space to slide along the arc-shaped hinge hole, ensuring the stability and reliability of the transmission.

[0011] Furthermore, the hydraulic fluid is water. It is inexpensive and readily available.

[0012] Furthermore, an upward-facing elastic bladder is sealed around the bottom of the piston groove, with the elastic bladder positioned between the piston and the hydraulic fluid.

[0013] This avoids direct contact between the piston and hydraulic fluid, preventing leakage at the gaps when the piston is under high pressure. This significantly improves the stability of the support and adjustment mechanism during operation.

[0014] Furthermore, a sealing connection made of waterproof fabric with a U-shaped cross-section is provided on the upper surface of the water inlet and outlet positions at both ends of the supporting base plate to achieve water-passing connection.

[0015] In this way, the flexibility of the impermeable fabric can be used to adjust the height of the support base plate at the front and rear while preventing water leakage at the front and rear end faces of the support base plate. In specific implementation, the rear end of the sealing connector at the rear end of the support base plate is sealed to the front end of the inlet pool, and the front end of the sealing connector at the front end of the support base plate is sealed to the rear end of the sedimentation tank.

[0016] As an alternative, the support adjustment mechanism includes two racks vertically arranged below the front and rear ends of the support base plate. The upper end of the rack is hinged to a hinge seat at the lower end of the support base plate, and the back side of the rack is slidably engaged with a guide rail fixed vertically to the ground. The rack is connected to a transmission gear, and the transmission gear is connected to a transmission motor.

[0017] In this way, the gear can be rotated by the drive motor, which in turn drives the rack to move up and down, thereby adjusting the height of the front and rear ends of the support base plate. The structure is simple and easy to implement, but the stability is relatively poor.

[0018] In summary, this utility model has the advantage of being able to conveniently and quickly adjust the longitudinal gradient of the water tank, thereby improving the efficiency of related scientific research and teaching. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of another embodiment of the present invention. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to specific embodiments.

[0022] Preferred implementation method: See Figure 1 As shown, a test water tank longitudinal slope adjustment system includes a support 31 located in the middle of the lower surface of the support base plate 20 of the test water tank. The middle part of the support base plate 20 is hinged to the support 31 and can rotate back and forth. The lower surfaces of the front and rear ends of the support base plate 20 are also equipped with a support adjustment mechanism that can realize height linkage adjustment.

[0023] In this way, the middle of the support base plate is hinged to the support support to form a lever structure. The height of the front and rear ends of the support base plate can be adjusted through the support adjustment mechanism. Therefore, without changing the shape of the water tank module, the longitudinal slope of the water tank can be directly adjusted and controlled to meet specific test requirements, which is very convenient and quick.

[0024] The support adjustment mechanism includes two piston grooves 32 located below the front and rear ends of the support base plate. The upper ends of the two piston grooves 32 are open and a piston 33 that can slide up and down is horizontally arranged inside them. A support rod 34 is vertically arranged on the upper end of the piston. The upper end of the support rod 34 is rotatably hinged to the lower surface of the support base plate 20 through a hinge shaft. The piston grooves 32 below the piston are filled with hydraulic fluid 39. The bottoms of the two piston grooves are connected to each other through a horizontally arranged connecting pipe 35. A switch valve 36 and a hydraulic pump 37 with forward and reverse rotation control function are installed on the connecting pipe 35.

[0025] In this way, when the longitudinal drop of the water tank needs to be adjusted, the switch valve can be opened, and then the hydraulic pump can be turned on. Controlling the hydraulic pump to rotate forward or backward allows for the left-right adjustment of the hydraulic fluid in the two piston slots. The cross-sectional area of ​​the piston slots is set such that when one piston slot is filled with fluid and the piston is pushed upward, the distance the other piston is pressed down is exactly the height by which the fluid level in that piston slot decreases (this can be calculated beforehand). Thus, by controlling the forward and reverse rotation of the hydraulic pump, the longitudinal drop of the support base plate can be adjusted. This design is not only simple and easy to control, but also ensures that the weight of the water tank, acting on the hydraulic fluid through the pistons at both ends, cancels out the pressure difference at the switch valve position via the connecting pipe. Therefore, the pressure difference across the switch valve in the connecting pipe is very small, greatly ensuring the stability of the system and the reliability of the adjustment. Alternatively, a height telescopic adjustment mechanism can be directly installed on each side of the support base plate, but in this case, the height telescopic adjustment mechanism would be subjected to the heavy pressure of the water tank for a long time during water tank testing, which could easily lead to instability and damage, resulting in a shorter service life and poor stability.

[0026] In practice, the switching valve 36 is a ball valve. This allows it to better withstand the liquid pressure at both ends and facilitates adjustment and control.

[0027] Among them, a downward hinge seat 38 is fixedly installed on the lower surface of the front and rear ends of the support base plate 20. The hinge seat is provided with an arc-shaped hinge hole that cooperates with the hinge shaft at the upper end of the support rod.

[0028] In this way, during the up-and-down rotation of the front and rear ends of the support base plate, the hinge shaft can have a matching clearance space to slide along the arc-shaped hinge hole, ensuring the stability and reliability of the transmission.

[0029] The hydraulic fluid 39 is water. It is inexpensive and readily available.

[0030] The piston groove 32 has an upward-facing elastic bladder sealed around its bottom edge, which is located between the piston 33 and the hydraulic fluid 39.

[0031] This avoids direct contact between the piston and hydraulic fluid, preventing leakage at the gaps when the piston is under high pressure. This significantly improves the stability of the support and adjustment mechanism during operation.

[0032] The support base plate has a U-shaped waterproof fabric sealing strip on its upper surface at both the front and rear water inlet and outlet positions to achieve water-passing connection.

[0033] In this way, the flexibility of the impermeable fabric can be used to adjust the height of the support base plate at the front and rear while preventing water leakage at the front and rear end faces of the support base plate. In specific implementation, the rear end of the sealing connector at the rear end of the support base plate is sealed to the front end of the inlet pool, and the front end of the sealing connector at the front end of the support base plate is sealed to the rear end of the sedimentation tank.

[0034] For other possible implementations, see [link to relevant documentation]. Figure 2 The support adjustment mechanism includes two racks 45 vertically arranged below the front and rear ends of the support base plate. The upper end of the rack 45 is hinged to the hinge seat at the lower end of the support base plate. The back side of the rack 45 is slidably engaged with a guide rail 46 vertically fixed to the ground. The rack 45 is connected to a transmission gear 47, and the transmission gear 47 is connected to a transmission motor 48.

[0035] In this way, the gear can be rotated by the drive motor, which in turn drives the rack to move up and down, thereby adjusting the height of the front and rear ends of the support base plate. The structure is simple and easy to implement, but the stability is relatively poor.

Claims

1. A longitudinal slope adjustment system for a test water tank, characterized in that, It includes a support base located in the middle of the lower surface of the support base plate of the test water tank. The middle part of the support base plate is hinged to the support base and can rotate back and forth. The lower surfaces of the front and rear ends of the support base plate are also equipped with a support adjustment mechanism that can realize height linkage adjustment.

2. The longitudinal slope adjustment system of the test water tank as described in claim 1, characterized in that, The support adjustment mechanism includes two piston grooves located below the front and rear ends of the support base plate. The upper ends of the two piston grooves are open and a piston that can slide up and down is horizontally installed inside them. A support rod is vertically installed at the upper end of the piston. The upper end of the support rod is rotatably hinged to the lower surface of the support base plate through a hinge shaft. The piston groove below the piston is filled with hydraulic fluid. The bottoms of the two piston grooves are connected to each other through a horizontally installed connecting pipe. A switch valve and a hydraulic pump with forward and reverse rotation control function are installed on the connecting pipe.

3. The longitudinal slope adjustment system of the test water tank as described in claim 2, characterized in that, Each of the front and rear ends of the support base plate has a downward-facing hinge seat fixedly installed on its lower surface. The hinge seat has an arc-shaped hinge hole that engages with the hinge pin at the upper end of the support rod.

4. The longitudinal slope adjustment system of the test water tank as described in claim 2, characterized in that, The hydraulic fluid is water.

5. The longitudinal slope adjustment system of the test water tank as described in claim 2, characterized in that, An upward-facing elastic bladder is sealed around the bottom of the piston groove, and the elastic bladder is positioned between the piston and the hydraulic fluid.

6. The longitudinal slope adjustment system of the test water tank as described in claim 2, characterized in that, A U-shaped waterproof fabric sealing strip is installed on the upper surface of the water inlet and outlet positions at both ends of the supporting base plate to achieve water-passing connection.

7. The longitudinal slope adjustment system of the test water tank as described in claim 1, characterized in that, The support adjustment mechanism includes two racks vertically arranged below the front and rear ends of the support base plate. The upper end of the rack is hinged to the hinge seat at the lower end of the support base plate. The back side of the rack is slidably engaged with a guide rail fixed vertically to the ground. The rack is connected to a transmission gear, and the transmission gear is connected to a transmission motor.

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