Two-stage combined underwater positioning device for dock gate
By combining the cylinder body, sealing block, and limit switch, the precise positioning of the two-section combined dock gate and the fine-tuning of the sealing block are achieved, solving the problem of uneven sealing surface and ensuring the accuracy and effect of underwater sealing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU YANGZI MITSUI SHIPBUILDING CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-24
AI Technical Summary
The two-section combined dock gate cannot guarantee the flatness of the sealing surface during installation, resulting in poor sealing performance and making it impossible to inspect and adjust underwater.
The dock gate assembly, consisting of a cylinder body, sealing block, and limit switch, achieves precise positioning of the dock gate body and fine-tuning of the sealing block through hydraulic drive and mechanical coupling. The elastic deformation of the sealing block fills microscopic unevenness, achieving sealing surface pressing and ensuring sealing accuracy.
The underwater sealing accuracy of the two-section combined dock gate is guaranteed. Closed-loop control enables precise alignment and pressing of the sealing surfaces, ensuring a good sealing effect.
Smart Images

Figure CN224546249U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical equipment technology, specifically a two-section combined dock gate underwater positioning device. Background Technology
[0002] The dock is wide, and if an integral dock gate is used, the weight will be very large. In order to reduce the total weight of the dock gate, the dock gate is adopted as a two-section combination, which is installed and disassembled by the gantry crane above.
[0003] Because the dock gate is divided into two sections, the first section of the dock gate cannot generate a water pressure difference to fit the dock threshold and form a seal. During installation, personnel cannot check the installation status at the bottom, and the flatness of the sealing surface between the two sections of the dock gate and the dock bottom cannot be guaranteed, making it difficult to form a good sealing effect. Utility Model Content
[0004] The purpose of this invention is to provide a two-section combined dock gate underwater positioning device to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a two-section combined dock gate underwater positioning device, including a dock gate body, a cylinder seat is bolted to the side of the dock gate body, and a cylinder body is fixedly installed on the cylinder seat, a limit position is installed on the dock gate body frame, and a sealing block is embedded in the groove at the bottom of the dock gate body.
[0006] Furthermore, the piston rod axis of the hydraulic cylinder body is parallel to the moving direction of the dock body, providing horizontal thrust.
[0007] Furthermore, a dock bottom sealing surface is pre-embedded in the dock bottom concrete structure below the dock gate body, and the dock bottom sealing surface and the sealing block form a sealing contact area.
[0008] Furthermore, an anchor stop is provided above the sealing surface of the dock bottom, and the stop bears the pushing force of the cylinder body and transmits the reaction force.
[0009] Furthermore, the piston rod surface of the cylinder body is provided with chrome plating for corrosion protection, and the center line of the piston rod is perpendicular to the pressure surface of the stop.
[0010] Furthermore, when the dock gate body moves, the limiting guide sealing block slides along a preset path until it contacts the sealing surface of the dock bottom.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] 1. In use, the present invention firstly extends the piston rod of the hydraulic cylinder body, pushes the stop, and drives the dock gate body to move to achieve coarse positioning of the dock gate body. Secondly, when the dock gate body moves, the limit guide sealing block slides along a preset path until it contacts the dock bottom sealing surface to achieve fine adjustment of the sealing block. Then, the hydraulic cylinder body continuously releases pressure, causing the sealing block to elastically deform and fill the microscopic unevenness of the dock bottom sealing surface to achieve sealing surface pressing. Finally, the limit triggers mechanical locking to stop the hydraulic cylinder body from advancing and complete the alignment of the dock bottom sealing surface. This application achieves closed-loop control of hydraulic drive, limit calibration, and sealing pressing by mechanically coupling the dock gate assembly composed of the hydraulic cylinder seat, hydraulic cylinder body, sealing block, and limit with the dock bottom assembly composed of the stop and dock bottom sealing surface, effectively ensuring underwater sealing accuracy. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model.
[0014] Figure 2 This is a schematic diagram of the overall structure of the device of this utility model from a second perspective;
[0015] Figure 3 This is a schematic diagram of the overall structure of the device of this utility model from three perspectives.
[0016] In the diagram: 1. Dock gate body; 2. Cylinder seat; 3. Cylinder body; 4. Stop; 5. Dock bottom sealing surface; 6. Limiting device; 7. Sealing block. Detailed Implementation
[0017] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0018] like Figures 1 to 3 As shown, a two-section combined dock gate underwater positioning device includes a dock gate body 1, a cylinder seat 2 is bolted to the side of the dock gate body 1, and a cylinder body 3 is fixedly installed on the cylinder seat 2. A limit 6 is installed on the frame of the dock gate body 1, and a sealing block 7 is embedded in the groove at the bottom of the dock gate body 1. The piston rod axis of the cylinder body 3 is parallel to the moving direction of the dock gate body 1 to provide horizontal thrust.
[0019] The specific operation is as follows: First, the piston rod of the cylinder body 3 extends, pushes the stop 4 and drives the dock gate body 1 to move to achieve the coarse positioning of the dock gate body 1. Second, when the dock gate body 1 moves, the limit 6 guides the sealing block 7 to slide along the preset path until it contacts the bottom sealing surface 5 to achieve the fine leveling of the sealing block 7.
[0020] like Figures 1 to 3As shown, a dock bottom sealing surface 5 is pre-embedded in the dock bottom concrete structure below the dock gate body 1, and the dock bottom sealing surface 5 and the sealing block 7 form a sealing contact area. A stop 4 is anchored on the dock bottom sealing surface 5, and the stop 4 bears the pushing force of the cylinder body 3 and transmits the reaction force. The piston rod surface of the cylinder body 3 is provided with chrome-plated anti-corrosion, and the center line of the piston rod of the cylinder body 3 is perpendicular to the pressure surface of the stop 4. When the dock gate body 1 moves, the limit 6 guides the sealing block 7 to slide along the preset path until it contacts the dock bottom sealing surface 5.
[0021] The specific operation is as follows: Then, the cylinder body 3 continuously releases pressure, causing the sealing block 7 to elastically deform and fill the microscopic unevenness of the dock bottom sealing surface 5 to achieve sealing surface pressing. Finally, the limit 6 triggers mechanical locking, causing the cylinder body 3 to stop advancing and complete the alignment of the dock bottom sealing surface 5. This application achieves closed-loop control of hydraulic drive, limit calibration, and sealing pressing by mechanically coupling the dock gate assembly composed of the cylinder seat 2, cylinder body 3, sealing block 7, and limit 6 with the dock bottom assembly composed of the stop 4 and dock bottom sealing surface 5, effectively ensuring underwater sealing accuracy.
[0022] Working principle: First, the piston rod of the cylinder body 3 extends, pushes the stop 4, and drives the dock gate body 1 to move, achieving coarse positioning of the dock gate body 1. Second, when the dock gate body 1 moves, the limit 6 guides the sealing block 7 to slide along a preset path until it contacts the dock bottom sealing surface 5, achieving fine adjustment and leveling of the sealing block 7. Then, the cylinder body 3 continuously releases pressure, causing the sealing block 7 to elastically deform and fill the microscopic unevenness of the dock bottom sealing surface 5, achieving sealing surface pressing. Finally, the limit 6 triggers a mechanical stop, causing the cylinder body 3 to stop advancing and complete the alignment of the dock bottom sealing surface 5. This application achieves closed-loop control of hydraulic drive, limit calibration, and sealing pressing through the mechanical coupling of the dock gate assembly composed of the cylinder seat 2, cylinder body 3, sealing block 7, and limit 6 with the dock bottom assembly composed of the stop 4 and dock bottom sealing surface 5, effectively ensuring underwater sealing accuracy.
[0023] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. A two-section combined dock gate underwater positioning device, comprising a dock gate body (1), characterized in that, The side of the dock gate body (1) is bolted with a cylinder seat (2), and a cylinder body (3) is fixedly installed on the cylinder seat (2). A limiter (6) is installed on the frame of the dock gate body (1), and a sealing block (7) is embedded in the groove at the bottom of the dock gate body (1).
2. The two-section combined dock gate underwater positioning device according to claim 1, characterized in that, The piston rod axis of the cylinder body (3) is parallel to the moving direction of the dock body (1) to provide horizontal thrust.
3. The two-section combined dock gate underwater positioning device according to claim 2, characterized in that, A dock bottom sealing surface (5) is pre-embedded in the dock bottom concrete structure below the dock gate body (1), and the dock bottom sealing surface (5) and the sealing block (7) form a sealing contact area.
4. The two-section combined dock gate underwater positioning device according to claim 3, characterized in that, An anchor stop (4) is anchored above the bottom sealing surface (5), and the stop (4) bears the pushing force of the cylinder body (3) and transmits the reaction force.
5. A two-section combined dock gate underwater positioning device according to claim 4, characterized in that, The piston rod of the cylinder body (3) is provided with chrome plating for corrosion protection, and the center line of the piston rod of the cylinder body (3) is perpendicular to the pressure surface of the stop (4).
6. The two-section combined dock gate underwater positioning device according to claim 5, characterized in that, When the dock gate body (1) moves, the limiting position (6) guides the sealing block (7) to slide along the preset path until it contacts the sealing surface (5) at the bottom of the dock.