Tidal level gate with precise and controllable lifting height for river engineering model and its use method

Abstract

The present invention provides a tidal water level gate with a precisely controllable lifting height that can be used for a river engineering model, comprising a gate, an outer turbine, a middle worm, an inner turbine, a transmission screw and a No. 1 lifting device, wherein the middle worm is meshed with the outer turbine and the inner turbine on both sides thereof, the middle part of the inner turbine is fixedly connected to the head end of the transmission screw, the tail end of the transmission screw is threadedly matched with the No. 1 and No. 2 threaded holes in the No. 1 lifting device, the top surface of the bracket in the No. 1 lifting device is in contact with the bottom of the gate, and the threaded transmission between the transmission screw and the threaded hole can control the height of the bracket. In addition, the present invention also provides a method for using the tidal water level gate. The present invention improves the transmission efficiency, expands the tidal water level control range, increases the control accuracy, is easy to operate, and can effectively solve the bottleneck of outlet water level control in the river engineering model.

Description

Technical Field

[0001] The present invention belongs to the technical field of river engineering models, and relates to a water level control gate, and in particular to a tidal water level gate with precisely controllable lifting height that can be used for river engineering models, and a method for using the tidal water level gate, which is specifically suitable for improving transmission efficiency, expanding control range, and enhancing control accuracy. Background Art

[0002] River engineering models are an important technical means to study the flow and sediment movement of rivers, lakes, and streams. Accurate control of the water level at the model outlet is one of the main determining factors for whether the model can be similar to the prototype, especially in estuary areas where the simulated water level is greatly affected by tides.

[0003] Traditional water level control gates at the outlet of river engineering models often use horizontal flap gate control gates, horizontal grating gate control gates and revolving gate control gates. Among them, the first type of water level control gate has large water level fluctuations at the outlet and the test accuracy is difficult to control; although the second type of water level control gate has little effect on water level fluctuations, due to the many gaps in the grating gate, the model outlet leakage is relatively large, affecting the flow (water level) stability; the third type of water level control gate controls the water level by rotating the gate. When simulating frequently changing tides, there will be problems of control lag and turbulent water flow at the model outlet.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects and problems of low transmission efficiency and narrow control range in the prior art, and to provide a tidal water level gate with high transmission efficiency and wide control range for river engineering models with precise controllable lifting height and a method of use.

[0006] To achieve the above objectives, the technical solution of the present invention is: a precisely controllable tidal level gate for river engineering models, comprising a gate, a left column and a right column, wherein the left and right sides of the gate are respectively vertically slidably matched with the inner side walls of the left column and the right column;

[0007] The lifting height precision controllable tidal water level gate for river engineering models also includes an outer worm gear, a middle worm, an inner worm gear, a transmission screw and a No. 1 lifting device. The No. 1 lifting device includes a base, a bracket, a No. 1 transmission horizontal axis and a No. 2 transmission horizontal axis. The interiors of the No. 1 transmission horizontal axis and the No. 2 transmission horizontal axis are respectively provided with a No. 1 threaded hole and a No. 2 threaded hole. The front end of the No. 1 transmission horizontal axis is hinged to the bottom end of the upper left front plate and the top end of the lower left front plate at the same time, the rear end of the No. 1 transmission horizontal axis is hinged to the bottom end of the upper left rear plate and the top end of the lower left rear plate at the same time, the front end of the No. 2 transmission horizontal axis is hinged to the bottom end of the upper right front plate and the top end of the lower right front plate at the same time, and the No. 2 transmission horizontal axis is hinged to the bottom end of the upper right front plate and the top end of the lower right front plate at the same time. The rear end of the base is hinged to the bottom end of the upper right rear plate and the top end of the lower right rear plate at the same time, the bottom surface of the base is in contact with the support bottom surface, the top surface of the base is connected to the bottom of the bottom front plate and the bottom rear plate, the two ends of the bottom front plate are respectively hinged to the bottom end of the lower left front plate and the bottom end of the lower right front plate, the two ends of the bottom rear plate are respectively hinged to the bottom end of the lower left rear plate and the bottom end of the lower right rear plate, the top surface of the bracket is in contact with the bottom of the gate, the bottom surface of the bracket is connected to the top of the supporting front plate and the supporting rear plate, the two ends of the supporting front plate are respectively hinged to the top end of the upper left front plate and the top end of the upper right front plate at the same time, and the two ends of the supporting rear plate are respectively hinged to the top end of the upper left rear plate and the top end of the upper right rear plate at the same time;

[0008] The middle worm is meshed with the outer worm wheel and the inner worm wheel on both sides thereof, the middle part of the inner worm wheel is fixedly connected to the head end of the transmission screw, the tail end of the transmission screw passes through the No. 1 threaded hole and the No. 2 threaded hole in sequence and then extends to the outside of the No. 2 threaded hole, and the transmission screw is threadedly matched with the No. 1 threaded hole and the No. 2 threaded hole.

[0009] The lifting height precision and controllable tidal level gate for river engineering models also includes a No. 2 lifting device with the same structure as the No. 1 lifting device. The No. 2 lifting device includes a No. 3 threaded hole and a No. 4 threaded hole. The tail end of the transmission screw rod passes through the No. 1 threaded hole, the No. 2 threaded hole, the No. 3 threaded hole, and the No. 4 threaded hole in sequence and then extends to the outside of the No. 4 threaded hole. The transmission screw rod is threadedly matched with the No. 1 threaded hole, the No. 2 threaded hole, the No. 3 threaded hole, and the No. 4 threaded hole.

[0010] The transmission screw includes a coaxial front screw and a rear screw, the head end of the front screw is fixedly connected to the middle part of the inner worm wheel, the tail end of the front screw passes through the No. 1 threaded hole and the No. 2 threaded hole in sequence and is connected to one end of the coupling, the other end of the coupling is connected to the head end of the rear screw, and the tail end of the rear screw passes through the No. 3 threaded hole and the No. 4 threaded hole in sequence and extends to the outside of the No. 4 threaded hole.

[0011] The middle part of the outer worm wheel is connected to the output end of the motor, and the side periphery of the outer worm wheel and the side periphery of the inner worm wheel are meshed with the middle worm located between the outer worm wheel and the inner worm wheel.

[0012] The bottom end of the middle worm is connected to the limit bearing, and the head end of the middle worm passes through the middle part of the linear bearing.

[0013] The side of the linear bearing is connected to the front of the gate, and the intersection of the linear bearing and the gate is located between the left column and the right column.

[0014] Vertical slide grooves are arranged in the inner side walls of the left column and the right column, vertical sliding blocks are arranged on the left and right sides of the gate, and the vertical sliding blocks are matched with the corresponding vertical slide grooves for vertical sliding.

[0015] A method for using the above-mentioned tidal water level gate with precise and controllable lifting height for river engineering models, the method comprising the following steps:

[0016] First, the outer worm gear is driven to rotate, and then the rotating outer worm gear drives the inner worm gear to rotate through the middle worm gear, and then the rotating inner worm gear drives the transmission screw to rotate, and then the rotating transmission screw cooperates with the No. 1 threaded hole and the No. 2 threaded hole to perform threaded transmission to change the spacing between the No. 1 transmission horizontal axis and the No. 2 transmission horizontal axis, thereby changing the spacing between the base and the bracket, and then raising or lowering the gate.

[0017] The positive rotation of the outer worm gear corresponds to reducing the distance between the first transmission horizontal axis and the second transmission horizontal axis, and raising the gate;

[0018] The reverse rotation of the outer worm gear corresponds to the expansion of the spacing between the first transmission horizontal axis and the second transmission horizontal axis and the lowering of the gate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the invention, a precisely controllable tidal water level gate for river engineering models and a method for using the gate is used to control the water level between the left column and the right column. The control range is from the bottom to the top of the left column and the right column. The control area is very wide, which is convenient for adapting to more application fields. Therefore, the control range of the invention is relatively wide.

[0021] 2. In the invention, a precisely controllable tidal water level gate for river engineering models and a method for using the gate, the outer worm wheel, the middle worm and the inner worm wheel are meshed with each other to transmit the driving force received by the outer worm wheel to the transmission screw connected to the inner worm wheel, thereby converting the rotary motion into the linear motion, and the transmission efficiency is high. In addition, the gate can be raised or lowered by rotating the outer worm wheel in the positive and negative directions, thereby achieving the function of blocking and raising the water level, and the operation difficulty is relatively low. Therefore, the invention not only has a high transmission efficiency, but also is easy to operate.

[0022] 3. In the invention, a tidal water level gate with a precisely controllable lifting height for a river engineering model and a method for using the tidal water level gate, the lifting height of the gate is determined by the relative height between the base and the bracket in the lifting device, and the relative height between the base and the bracket is determined by the relative distance between the first transmission transverse axis and the second transmission transverse axis, and the spacing between the first and second transmission transverse axes is determined by the threaded transmission match between the transmission screw and the threaded hole. This transmission match allows the height of the gate to be accurately calculated for each rotation through the pitch of the transmission screw, with high accuracy, which facilitates more accurate control of the height of the gate and reduces the difficulty of controlling the water level. Therefore, the invention not only has high accuracy, but also has low operation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 yes Figure 1 Transmission diagram of the middle and outer worm wheels and the middle worm.

[0025] Figure 3 yes Figure 2 Top view of the .

[0026] Figure 4 It is a structural schematic diagram of a No. 1 lifting device in the present invention.

[0027] Figure 5 It is a schematic diagram of the state of the No. 1 lifting device when the gate is raised in the present invention.

[0028] Figure 6 It is a schematic diagram of the state of the No. 1 lifting device when the gate is lowered in the present invention.

[0029] In the figure: gate 1, vertical slider 11, outer worm gear 2, middle worm 3, limit bearing 31, linear bearing 32, inner worm gear 4, transmission screw 5, coupling 50, front screw 51, rear screw 52, ​​No. 1 lifting device 6, base 61, bottom front plate 611, bottom rear plate 612, bracket 62, support front plate 621, support rear plate 622, No. 1 transmission horizontal axis 63, upper left front plate 631, lower left front plate 632, upper left rear plate 633, lower left rear plate 634, No. 2 transmission horizontal axis 64, upper right front plate 641, lower right front plate 642, upper right rear plate 643, lower right rear plate 644, No. 1 threaded hole 65, No. 2 threaded hole 66, No. 2 lifting device 7, No. 3 threaded hole 71, No. 4 threaded hole 72, left column 8, vertical slide 81, right column 9, motor 10, support bottom surface 12. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] See also Figure 1 ― Figure 6 A tidal water level gate with a precisely controllable lifting height for a river engineering model comprises a gate 1, a left column 8 and a right column 9, wherein the left and right sides of the gate 1 are respectively vertically slidably matched with the inner side walls of the left column 8 and the right column 9;

[0032] The lifting height precision controllable tidal level gate for river engineering models also includes an outer worm gear 2, a middle worm 3, an inner worm gear 4, a transmission screw 5 and a No. 1 lifting device 6. The No. 1 lifting device 6 includes a base 61, a bracket 62, a No. 1 transmission horizontal axis 63 and a No. 2 transmission horizontal axis 64. The interiors of the No. 1 transmission horizontal axis 63 and the No. 2 transmission horizontal axis 64 are respectively provided with a No. 1 threaded hole 65 and a No. 2 threaded hole 66. The front end of the No. 1 transmission horizontal axis 63 is hinged to the bottom end of the upper left front plate 631 and the top end of the lower left front plate 632 at the same time, the rear end of the No. 1 transmission horizontal axis 63 is hinged to the bottom end of the upper left rear plate 633 and the top end of the lower left rear plate 634 at the same time, the front end of the No. 2 transmission horizontal axis 64 is hinged to the bottom end of the upper right front plate 641 and the top end of the lower right front plate 642 at the same time, and the rear end of the No. 2 transmission horizontal axis 64 is hinged to the upper right rear plate The bottom end of the gate 1 is hinged to the bottom of the bottom plate 632 and the bottom end of the bottom right front plate 642, and the bottom end of the bottom rear plate 612 is hinged to the bottom of the gate 1. The bottom surface of the base 61 is in contact with the supporting bottom surface 12, and the top surface of the base 61 is connected to the bottom of the bottom front plate 611 and the bottom end of the bottom rear plate 612. The two ends of the bottom front plate 611 are hinged to the bottom end of the lower left front plate 632 and the bottom end of the lower right front plate 642, respectively. The two ends of the bottom rear plate 612 are hinged to the bottom end of the lower left rear plate 634 and the bottom end of the lower right rear plate 644, respectively. The top surface of the bracket 62 is in contact with the bottom of the gate 1, and the bottom surface of the bracket 62 is connected to the top of the supporting front plate 621 and the supporting rear plate 622. The two ends of the supporting front plate 621 are hinged to the top of the upper left front plate 631 and the top of the upper right front plate 641, respectively. The two ends of the supporting rear plate 622 are hinged to the top of the upper left rear plate 633 and the top of the upper right rear plate 643, respectively.

[0033] The middle worm 3 is meshed with the outer worm wheel 2 and the inner worm wheel 4 located on both sides thereof. The middle part of the inner worm wheel 4 is fixedly connected to the head end of the transmission screw 5. The tail end of the transmission screw 5 passes through the No. 1 threaded hole 65 and the No. 2 threaded hole 66 in sequence and then extends to the outside of the No. 2 threaded hole 66. The transmission screw 5 is threadedly matched with the No. 1 threaded hole 65 and the No. 2 threaded hole 66.

[0034] The lifting height precision controllable tidal water level gate for river engineering models also includes a No. 2 lifting device 7 with the same structure as the No. 1 lifting device 6. The No. 2 lifting device 7 includes a No. 3 threaded hole 71 and a No. 4 threaded hole 72. The tail end of the transmission screw 5 passes through the No. 1 threaded hole 65, the No. 2 threaded hole 66, the No. 3 threaded hole 71, and the No. 4 threaded hole 72 in sequence and then extends to the outside of the No. 4 threaded hole 72. The transmission screw 5 is threadedly matched with the No. 1 threaded hole 65, the No. 2 threaded hole 66, the No. 3 threaded hole 71, and the No. 4 threaded hole 72.

[0035] The transmission screw rod 5 includes a coaxial front screw rod 51 and a rear screw rod 52. The head end of the front screw rod 51 is fixedly connected to the middle part of the inner worm wheel 4, and the tail end of the front screw rod 51 passes through the No. 1 threaded hole 65 and the No. 2 threaded hole 66 in sequence and is connected to one end of the coupling 50. The other end of the coupling 50 is connected to the head end of the rear screw rod 52, and the tail end of the rear screw rod 52 passes through the No. 3 threaded hole 71 and the No. 4 threaded hole 72 in sequence and extends to the outside of the No. 4 threaded hole 72.

[0036] The middle portion of the outer worm wheel 2 is connected to the output end of the motor 10 , and the side periphery of the outer worm wheel 2 and the side periphery of the inner worm wheel 4 are simultaneously meshed with the middle worm 3 located between the outer worm wheel 2 and the inner worm wheel 4 .

[0037] The bottom end of the middle worm 3 is connected to the limit bearing 31 , and the head end of the middle worm 3 passes through the middle of the linear bearing 32 .

[0038] The side of the linear bearing 32 is connected to the front side of the gate 1 , and the intersection of the linear bearing 32 and the gate 1 is located between the left column 8 and the right column 9 .

[0039] Vertical slide grooves 81 are disposed in the inner side walls of the left column 8 and the right column 9 , and vertical sliders 11 are disposed on both the left and right sides of the gate 1 , and the vertical sliders 11 are vertically slidably matched with the corresponding vertical slide grooves 81 .

[0040] A method for using the above-mentioned tidal water level gate with precise and controllable lifting height for river engineering models, the method comprising the following steps:

[0041] First, the outer worm gear 2 is driven to rotate, and then the rotating outer worm gear 2 drives the inner worm gear 4 to rotate through the middle worm gear 3, and then the rotating inner worm gear 4 drives the transmission screw 5 to rotate, and then the rotating transmission screw 5 is threadedly matched with the No. 1 threaded hole 65 and the No. 2 threaded hole 66 to change the spacing between the No. 1 transmission horizontal axis 63 and the No. 2 transmission horizontal axis 64, thereby changing the spacing between the base 61 and the bracket 62, and then raising or lowering the gate 1.

[0042] The positive rotation of the outer worm gear 2 corresponds to reducing the distance between the first transmission horizontal axis 63 and the second transmission horizontal axis 64, and raising the gate 1;

[0043] The reverse rotation of the outer worm gear 2 corresponds to increasing the distance between the first transmission horizontal axis 63 and the second transmission horizontal axis 64 and lowering the gate 1 .

[0044] The principle of the present invention is described as follows:

[0045] When the present invention is applied, the number of lifting devices driven by the transmission screw is not limited to one, and the specific number of lifting devices depends on the use requirements. When the number of lifting devices used is more than one, the lifting devices only need to be able to cooperate with the transmission screw for threaded transmission and be able to lift the gate under the threaded transmission. The other structures that are not closely related to the core purpose may be different.

[0046] Embodiment 1:

[0047] See also Figure 1 ― Figure 6A tidal water level gate with a precisely controllable lifting height for a river engineering model comprises a gate 1, a left column 8, a right column 9, an outer worm wheel 2, a middle worm wheel 3, an inner worm wheel 4, a transmission screw 5 and a No. 1 lifting device 6. The No. 1 lifting device 6 comprises a base 61, a bracket 62, a No. 1 transmission horizontal shaft 63 and a No. 2 transmission horizontal shaft 64. The No. 1 transmission horizontal shaft 63 and the No. 2 transmission horizontal shaft 64 have a No. 1 threaded hole 65 and a No. 2 threaded hole 66 respectively arranged inside. The front end of the No. 1 transmission horizontal shaft 63 is connected to the left upper front plate 6 The bottom end of the base 61 is hinged to the bottom end of the upper left rear plate 633 and the top end of the lower left rear plate 634, the rear end of the first transmission horizontal shaft 63 is hinged to the bottom end of the upper left rear plate 633 and the top end of the lower left rear plate 634, the front end of the second transmission horizontal shaft 64 is hinged to the bottom end of the upper right front plate 641 and the top end of the lower right front plate 642, the rear end of the second transmission horizontal shaft 64 is hinged to the bottom end of the upper right rear plate 643 and the top end of the lower right rear plate 644, the bottom surface of the base 61 is in contact with the bottom surface of the support, and the top surface of the base 61 is in contact with the bottom front plate 6 11. The bottom of the bottom rear plate 612 is connected, the two ends of the bottom front plate 611 are respectively hinged to the bottom end of the left lower front plate 632 and the bottom end of the right lower front plate 642, the two ends of the bottom rear plate 612 are respectively hinged to the bottom end of the left lower rear plate 634 and the bottom end of the right lower rear plate 644, the top surface of the bracket 62 is in contact with the bottom of the gate 1, the bottom surface of the bracket 62 is connected to the top of the front support plate 621 and the rear support plate 622, the two ends of the front support plate 621 are respectively hinged to the top of the upper left front plate 631 and the upper right front plate 64 1 is hinged at the same time, and the two ends of the rear support plate 622 are hinged at the same time with the top of the left upper rear plate 633 and the top of the right upper rear plate 643 respectively; the middle worm 3 is meshed with the outer worm wheel 2 and the inner worm wheel 4 located on both sides thereof, the middle part of the inner worm wheel 4 is fixedly connected with the head end of the transmission screw 5, and the tail end of the transmission screw 5 passes through the No. 1 threaded hole 65 and the No. 2 threaded hole 66 in sequence and then extends to the outside of the No. 2 threaded hole 66, and the transmission screw 5 is threadedly matched with the No. 1 threaded hole 65 and the No. 2 threaded hole 66.

[0048] A method for using the above-mentioned tidal water level gate with precise controllable lifting height for river engineering models includes the following steps: first drive the outer worm wheel 2 to rotate, and then the rotating outer worm wheel 2 drives the inner worm wheel 4 to rotate through the middle worm 3, and then the rotating inner worm wheel 4 drives the transmission screw 5 to rotate, and then the rotating transmission screw 5 is threadedly matched with the No. 1 threaded hole 65 and the No. 2 threaded hole 66 to change the spacing between the No. 1 transmission horizontal axis 63 and the No. 2 transmission horizontal axis 64, thereby changing the spacing between the base 61 and the bracket 62, and then raising or lowering the gate 1. Preferably, the positive direction rotation of the outer worm wheel 2 corresponds to reducing the spacing between the No. 1 transmission horizontal axis 63 and the No. 2 transmission horizontal axis 64, and raising the gate 1; the reverse direction rotation of the outer worm wheel 2 corresponds to expanding the spacing between the No. 1 transmission horizontal axis 63 and the No. 2 transmission horizontal axis 64, and lowering the gate 1. Embodiment 2:

[0049] The basic content is the same as that of Example 1, except that:

[0050] The lifting height precision controllable tidal water level gate for river engineering models also includes a No. 2 lifting device 7 with the same structure as the No. 1 lifting device 6. The No. 2 lifting device 7 includes a No. 3 threaded hole 71 and a No. 4 threaded hole 72. The tail end of the transmission screw 5 passes through the No. 1 threaded hole 65, the No. 2 threaded hole 66, the No. 3 threaded hole 71, and the No. 4 threaded hole 72 in sequence and then extends to the outside of the No. 4 threaded hole 72. The transmission screw 5 is threadedly matched with the No. 1 threaded hole 65, the No. 2 threaded hole 66, the No. 3 threaded hole 71, and the No. 4 threaded hole 72. The transmission screw 5 includes a coaxial front screw 51 and a rear screw 52. The head end of the front screw 51 is fixedly connected to the middle of the inner worm wheel 4. The tail end of the front screw 51 passes through the No. 1 threaded hole 65 and the No. 2 threaded hole 66 in sequence and is connected to one end of the coupling 50. The other end of the coupling 50 is connected to the head end of the rear screw 52. The tail end of the rear screw 52 passes through the No. 3 threaded hole 71 and the No. 4 threaded hole 72 in sequence and extends to the outside of the No. 4 threaded hole 72.

[0051] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A tidal water level gate with a precisely controllable lifting height for a river engineering model, comprising a gate (1), a left column (8) and a right column (9), wherein the left and right sides of the gate (1) are respectively vertically slidably matched with the inner side walls of the left column (8) and the right column (9), and characterized in that: The tidal level gate with a precisely controllable lifting height for a river engineering model further comprises an outer worm gear (2), a middle worm gear (3), an inner worm gear (4), a transmission screw (5) and a No. 1 lifting device (6). The No. 1 lifting device (6) comprises a base (61), a bracket (62), a No. 1 transmission transverse shaft (63) and a No. 2 transmission transverse shaft (64). The No. 1 transmission transverse shaft (63) and the No. 2 transmission transverse shaft (64) are respectively provided with a No. 1 threaded hole (65), a No. 2 threaded hole (66) and a No. 3 threaded hole (67). 66), the front end of the first transmission transverse axis (63) is hinged to the bottom end of the upper left front plate (631) and the top end of the lower left front plate (632), the rear end of the first transmission transverse axis (63) is hinged to the bottom end of the upper left rear plate (633) and the top end of the lower left rear plate (634), the front end of the second transmission transverse axis (64) is hinged to the bottom end of the upper right front plate (641) and the top end of the lower right front plate (642), the rear end of the second transmission transverse axis (64) is hinged to the upper right rear plate The bottom end of the bottom plate (643) and the top end of the lower right rear plate (644) are hinged at the same time, the bottom surface of the base (61) is in contact with the support bottom surface (12), the top surface of the base (61) is connected to the bottom of the bottom front plate (611) and the bottom of the bottom rear plate (612), the two ends of the bottom front plate (611) are respectively hinged to the bottom end of the lower left front plate (632) and the bottom end of the lower right front plate (642), and the two ends of the bottom rear plate (612) are respectively hinged to the bottom end of the lower left rear plate (634) and the bottom right rear plate The bottom end of the support seat (644) is hingedly connected, the top surface of the support seat (62) contacts the bottom of the gate (1), the bottom surface of the support seat (62) is connected to the top of the front support plate (621) and the top of the rear support plate (622), the two ends of the front support plate (621) are respectively hingedly connected to the top of the upper left front plate (631) and the top of the upper right front plate (641), and the two ends of the rear support plate (622) are respectively hingedly connected to the top of the upper left rear plate (633) and the top of the upper right rear plate (643); The middle worm (3) is meshed with the outer worm wheel (2) and the inner worm wheel (4) located on both sides thereof, the middle part of the inner worm wheel (4) is fixedly connected to the head end of the transmission screw (5), the tail end of the transmission screw (5) passes through the No. 1 threaded hole (65) and the No. 2 threaded hole (66) in sequence and then extends to the outside of the No. 2 threaded hole (66), and the transmission screw (5) is threadedly matched with the No. 1 threaded hole (65) and the No. 2 threaded hole (66); The middle part of the outer worm wheel (2) is connected to the output end of the motor (10), and the side periphery of the outer worm wheel (2) and the side periphery of the inner worm wheel (4) are simultaneously meshed with the middle worm (3) located between the outer worm wheel (2) and the inner worm wheel (4); The bottom end of the middle worm (3) is connected to the limit bearing (31), and the head end of the middle worm (3) passes through the middle of the linear bearing (32); The side of the linear bearing (32) is connected to the front side of the gate (1), and the intersection of the linear bearing (32) and the gate (1) is located between the left column (8) and the right column (9).

2. The tidal water level gate with precise and controllable lifting height for river engineering model according to claim 1 is characterized by: The lifting height precision controllable tidal level gate for river engineering models further comprises a No. 2 lifting device (7) having the same structure as the No. 1 lifting device (6), wherein the No. 2 lifting device (7) comprises a No. 3 threaded hole (71) and a No. 4 threaded hole (72), and the tail end of the transmission screw rod (5) sequentially passes through the No. 1 threaded hole (65), the No. 2 threaded hole (66), the No. 3 threaded hole (71), and the No. 4 threaded hole (72) and then extends to the outside of the No. 4 threaded hole (72), and the transmission screw rod (5) is threadedly matched with the No. 1 threaded hole (65), the No. 2 threaded hole (66), the No. 3 threaded hole (71), and the No. 4 threaded hole (72).

3. The tidal level gate with precise and controllable lifting height for river engineering model according to claim 2 is characterized by: The transmission screw (5) comprises a coaxial front screw (51) and a rear screw (52), the head end of the front screw (51) being fixedly connected to the middle of the inner worm wheel (4), the tail end of the front screw (51) passing through a No. 1 threaded hole (65) and a No. 2 threaded hole (66) in sequence and then connected to one end of a coupling (50), the other end of the coupling (50) being connected to the head end of the rear screw (52), the tail end of the rear screw (52) passing through a No. 3 threaded hole (71) and a No. 4 threaded hole (72) in sequence and then extending to the outside of the No. 4 threaded hole (72).

4. A tidal water level gate with a precisely controllable lifting height for a river engineering model according to claim 1, 2 or 3, characterized in that: Vertical slide grooves (81) are provided in the inner side walls of the left column (8) and the right column (9), and vertical sliding blocks (11) are provided on the left and right sides of the gate (1), and the vertical sliding blocks (11) are vertically slidably matched with the corresponding vertical slide grooves (81).

5. A method for using the precisely controllable tidal level gate for river engineering models according to claim 1, 2 or 3, characterized in that The method of use comprises the following steps: First, the outer worm wheel (2) is driven to rotate, and then the rotating outer worm wheel (2) drives the inner worm wheel (4) to rotate via the middle worm (3), and then the rotating inner worm wheel (4) drives the transmission screw (5) to rotate, and then the rotating transmission screw (5) is threadedly matched with the first threaded hole (65) and the second threaded hole (66) to change the spacing between the first transmission horizontal axis (63) and the second transmission horizontal axis (64), thereby changing the spacing between the base (61) and the bracket (62), and then raising or lowering the gate (1).

6. The method for using the precisely controllable tidal level gate for river engineering models according to claim 5 is characterized in that: The positive rotation of the outer worm gear (2) corresponds to reducing the distance between the first transmission horizontal axis (63) and the second transmission horizontal axis (64), thereby raising the gate (1); The reverse rotation of the outer worm gear (2) corresponds to increasing the distance between the first transmission horizontal axis (63) and the second transmission horizontal axis (64), thereby lowering the gate (1).

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