An enhanced quick-connect device suitable for low-temperature loading and unloading environments

Abstract

The utility model relates to the technical field of low-temperature medium loading and unloading between tank ships and wharf storage tanks, and in particular to an enhanced quick-connect device suitable for low-temperature loading and unloading environments, including a fixing plate fixed to the outside of a three-dimensional joint by a lateral bracket, a hydraulic cylinder movably mounted inside the fixing plate away from the flange joint end of the three-dimensional joint, and a triangular plate movably mounted inside the fixing plate on one side of the telescopic rod of the hydraulic cylinder. The enhanced quick-connect device suitable for low-temperature loading and unloading environments of the utility model uses an independent hydraulic cylinder to operate the claws, which can ensure that each claw can work independently and avoid the loss of response of all claws due to the failure of a single hydraulic cylinder; in addition, the weight of the three-dimensional joint can be reduced by improving the structure and optimizing the internal space, and the structure is actually lighter and more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature medium loading and unloading between a tank ship and a wharf storage tank, in particular to an enhanced quick connection device suitable for low-temperature loading and unloading environment. Background Art

[0002] As a professional tool for loading and unloading cryogenic media between tank ships and terminal storage tanks, the cryogenic fluid shipping arm is designed to handle extremely low-temperature media such as -104°C ethylene and -163°C LNG. In extreme loading and unloading environments, QCDC plays a vital role. QCDC, also known as hydraulic quick connect and disconnect connectors, is the key to connecting core components to the ship-end manifold flange. It not only needs to maintain a stable connection state in a low-temperature environment, but also ensure safe and efficient connection and disconnection during frequent loading and unloading. In such a low-temperature transmission environment, the performance of QCDC directly affects the safety and efficiency of the entire loading and unloading process.

[0003] The loading and unloading arm structure includes a quick connector QCDC to connect to the ship, followed by an emergency release device and a swivel joint. From a structural and functional point of view, all the claws of the quick connector are controlled by the same double-acting hydraulic cylinder, ensuring that all the claws move synchronously and evenly apply force to the manifold. In addition, it is equipped with a unique mechanical locking device. In the event of hydraulic failure, the claws can still be fixed to the manifold through the spring rod on the hook assembly. Although the ship-catching function of QCDC is already quite good, if the hydraulic cylinder fails, all the claws may not be able to grab the manifold flange in time when catching the ship. In severe sea conditions, there is a risk that the manifold flange will rub or collide with the extended outer arm or the three-dimensional joint or even the sealing ring of QCDC. In addition, this structural form also increases the weight of the three-dimensional joint. Utility Model Content

[0004] The technical problem to be solved by the utility model is that if the hydraulic cylinder of the traditional QCDC fails, all the claws may not be able to grasp the manifold flange in time when receiving the ship; under severe sea conditions, the manifold flange is at risk of friction or collision with the extended outer arm or the three-dimensional joint or even the sealing ring of the QCDC; in addition, this structural form also increases the weight of the three-dimensional joint.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an enhanced quick connection device suitable for low-temperature loading and unloading environments, including a fixing plate fixed to the outside of a three-dimensional joint through a lateral bracket, a hydraulic cylinder movably installed inside the fixing plate away from the flange joint end of the three-dimensional joint, a triangular plate movably installed inside the fixing plate on the side of the telescopic rod of the hydraulic cylinder, a clamping claw and a knife plate movably installed on the side of the fixing plate adjacent to the three-dimensional joint through a transverse axis, the outer end of the clamping claw is connected to the outer end of the knife plate by a spring assembly, and the triangular plate and the knife plate are connected by a connecting plate.

[0006] The triangle plate is provided with three assembly through holes at the top corner positions. The triangle plate is movably assembled with the fixed plate by being sleeved on the mounting cross bar inside the fixed plate through the assembly through hole on one side. The top end of the telescopic rod of the hydraulic cylinder is inserted into the assembly through hole through the transverse control axis and movably assembled with one side of the triangle plate. The connecting plate is movably connected with the triangle plate by the mounting rod at the bottom end that transversely penetrates the assembly through hole.

[0007] A sleeper rail is fixedly mounted on the clamping surface of the clamping jaws.

[0008] The knife plate is provided with a lateral transition notch near the end of the triangle plate for facilitating the turning over of the triangle plate.

[0009] The top end of the triangular plate adopts a rounded structure.

[0010] The telescopic rod and the connecting plate of the hydraulic cylinder are respectively arranged on both sides of the triangular plate.

[0011] The beneficial effects of the utility model are:

[0012] (1) The enhanced quick-connect device of the utility model suitable for low-temperature loading and unloading environments uses an independent hydraulic cylinder to operate the claws, which can ensure that each claw can work independently and avoid the loss of response of all claws due to the failure of a single hydraulic cylinder;

[0013] (2) In addition, the weight of the three-dimensional joint can be reduced by improving the structure and optimizing the internal space, making the structure lighter and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of the utility model in a clamping state.

[0016] Figure 2 It is a schematic diagram of the utility model in an unfolded state. DETAILED DESCRIPTION

[0017] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] Figure 1 and Figure 2 An enhanced quick connection device suitable for low-temperature loading and unloading environment is shown, including a fixing plate 2 fixed to the outside of the three-dimensional joint by a lateral bracket 1, a thermal insulation gasket is installed on the connecting surface of the lateral bracket 1 and the fixing plate 2 to reduce the temperature conduction speed, a hydraulic cylinder 3 is movably installed inside the fixing plate 2 at the end of the flange joint away from the three-dimensional joint, a triangular plate 4 is movably installed inside the fixing plate 2 on the side of the telescopic rod of the hydraulic cylinder 3, a clamping claw 5 and a knife plate 6 are movably installed on the side of the fixing plate 2 adjacent to the three-dimensional joint through a transverse axis, the outer end of the clamping claw 5 is connected to the outer end of the knife plate 6 by a spring assembly 7, and the triangular plate 4 is connected to the knife plate 6 by a connecting plate 8.

[0020] Three assembly through holes are opened at the top corner positions inside the triangle plate 4. The triangle plate 4 is movably assembled with the fixed plate 2 by being sleeved on the mounting cross bar inside the fixed plate 2 through the assembly through hole on one side. The top end of the telescopic rod of the hydraulic cylinder 3 is inserted into the assembly through hole through the transverse control axis and movably assembled with one side of the triangle plate 4. The connecting plate 8 is movably connected to the triangle plate 4 by the mounting rod at the bottom that passes through the assembly through hole transversely.

[0021] A sleeper rail 9 is fixedly mounted on the clamping surface of the clamping jaw 5 .

[0022] The end of the knife plate 6 near the triangle plate 4 is provided with a lateral transition notch for facilitating the turning of the triangle plate 4.

[0023] The top end of the triangle plate 4 adopts a rounded structure.

[0024] The telescopic rod of the hydraulic cylinder 3 and the connecting plate 8 are respectively arranged on both sides of the triangular plate 4.

[0025] Considering the size of the longitudinal space, the extension and retraction of the piston rod of the hydraulic cylinder 3 are set to correspond to the opening and clamping actions of the clamping claw 5. When the piston rod of the hydraulic cylinder 3 is extended, the triangular plate 4 rotates clockwise, driving the knife plate 6 and the spring assembly 7 to move counterclockwise, so that the clamping claw 5 gradually opens outward. When the piston rod is retracted, the triangular plate 4 rotates counterclockwise, causing the knife plate 6 and the spring assembly 7 to move clockwise, and the clamping claw 5 gradually presses inward. When the clamping claw 5 continues to press inward to reach the maximum compression preset by the spring assembly 7, that is, the structure reaches the dead point threshold, at this time, the hydraulic cylinder 3 needs to overcome the maximum reverse thrust applied by the spring assembly 7. Therefore, it is very important to analyze and select the load of the piston rod of the hydraulic cylinder 3. It is worth noting that the fixed position and stroke of the hydraulic cylinder 3 also directly determine the size of the dead angle of the structure. During the movement of the clamping claw mechanism, we also fully consider lubrication measures to reduce wear and extend the service life of the equipment.

[0026] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An enhanced quick-connect device suitable for low-temperature loading and unloading environments, comprising a fixing plate (2) fixed to the outside of a three-dimensional joint by a lateral bracket (1), wherein: A hydraulic cylinder (3) is movably mounted inside the fixed plate (2) at the end of the flange joint away from the three-dimensional joint, a triangular plate (4) is movably mounted inside the fixed plate (2) at one side of the telescopic rod of the hydraulic cylinder (3), a clamping claw (5) and a knife plate (6) are movably mounted on the side of the fixed plate (2) adjacent to the three-dimensional joint via a transverse axis, the outer end of the clamping claw (5) is connected to the outer end of the knife plate (6) via a spring assembly (7), and the triangular plate (4) is connected to the knife plate (6) via a connecting plate (8).

2. The enhanced quick-connect device suitable for low-temperature loading and unloading environment according to claim 1 is characterized in that: The triangle plate (4) has three assembly through holes at the top corners. The triangle plate (4) is sleeved on the mounting cross bar inside the fixed plate (2) through the assembly through hole on one side to be movably assembled with the fixed plate (2). The top end of the telescopic rod of the hydraulic cylinder (3) is inserted into the assembly through hole through the transverse control shaft to be movably assembled with one side of the triangle plate (4). The connecting plate (8) is movably connected to the triangle plate (4) by the mounting rod at the bottom end passing through the assembly through hole transversely.

3. The enhanced quick connection device suitable for low temperature loading and unloading environment according to claim 1 is characterized in that: A sleeper rail (9) is fixedly mounted on the clamping surface of the clamping jaw (5).

4. The enhanced quick-connect device suitable for low-temperature loading and unloading environment according to claim 1 is characterized in that: The knife plate (6) is provided with a lateral transition notch at the end adjacent to the triangular plate (4) for facilitating the turning of the triangular plate (4).

5. The enhanced quick connection device suitable for low temperature loading and unloading environment according to claim 1 is characterized in that: The top end of the triangular plate (4) adopts a rounded structure.

6. The enhanced quick-connect device suitable for low-temperature loading and unloading environment according to claim 1 is characterized in that: The telescopic rod and the connecting plate (8) of the hydraulic cylinder (3) are respectively arranged on both sides of the triangular plate (4).

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