Ship anchor winch dynamic load test device

Abstract

The utility model discloses a ship anchor winch dynamic load test device, it is in order to solve the problem of traditional device dependence large -scale test tower, large, cost is high, the low problem of measurement accuracy, it includes anchor winch body, oil cylinder and control platform, the reel of anchor winch body is around winding and winding rope, and winding rope passes through tensile force sensor and is coaxial with the piston rod of oil cylinder and is connected, and the oil cylinder is equipped with the pipeline of intercommunication, and the rod cavity and the rodless cavity are communicated respectively at both ends, and overflow valve and control valve are established on the pipeline, realize oil liquid quick backflow and pressure accurate regulation, avoid the influence measurement of back pressure resistance, and the speed sensor is established to the end of oil cylinder, and the piston rod telescopic speed is detected in real time. Oil cylinder is fixed through floating adjustment support, and the support contains base, hoop and elastic piece, can absorb vibration, compensate error. The utility model cancels large -scale test tower, simplifies structure, reduces the land occupation and cost, and the hydraulic backflow optimization is combined with high accuracy sensing, improves the measurement accuracy and can adapt to the test demand of different specifications anchor winch.

Description

Technical Field

[0001] This utility model relates to the field of anchor winch technology, and in particular to a ship anchor winch dynamic load test device. Background Technology

[0002] As a core piece of equipment in marine vessels and marine engineering equipment, the anchor winch's performance, including its stability in force transmission and its speed regulation responsiveness under dynamic load conditions, directly affects the safety and reliability of offshore operations. Therefore, before the anchor winch leaves the factory or during regular maintenance, its performance parameters must be accurately tested using specialized dynamic load testing equipment to provide data support for equipment quality control and safe operation.

[0003] The existing utility model patent with publication number CN204439353U discloses a marine shipborne winch test bench, including a hydraulic cylinder, a tower, a bottom pulley, a speed measuring gear, a bottom pulley mounting base, a top pulley mounting base, a top small pulley, a top large pulley, and a steel wire rope. The bottom pulley is mounted on the bottom of the tower via the bottom pulley mounting base, and a speed measuring gear is mounted on the pulley shaft of the bottom pulley, with a speed measuring sensor at the speed measuring gear. The top large pulley and the top small pulley are mounted on the top of the tower via the top pulley mounting base. The hydraulic cylinder is hinged to the tower near the bottom pulley mounting base and is connected to a hydraulic station. One end of the steel wire rope is connected to a counterweight, and a tension sensor is installed at the connection point. The other end is fixed after passing through the free end of the top large pulley, the top small pulley, the bottom pulley, the winch, and the hydraulic cylinder in sequence.

[0004] It requires the construction of a large test tower, which occupies a large area and has high construction costs. In addition, a large number of counterweights are required during the test, making transportation and debugging cumbersome. At the same time, its speed measurement relies on the time conversion of the cable passing through a fixed distance, which can only obtain the average speed and cannot capture the real-time speed changes of the anchor winch during dynamic loading, thus limiting the measurement accuracy.

[0005] Regarding the aforementioned existing technologies, the inventors believe that existing anchor winch motor load testing devices require the construction of large test towers or complex platforms, occupy a large area, and have high construction and operating costs; furthermore, they require a large number of counterweights during the testing process, making transportation and debugging cumbersome. Summary of the Invention

[0006] To address the aforementioned technical problems, this utility model provides a ship anchor winch load test device that eliminates the need for a test tower, occupies a small area, has low testing costs, high measurement accuracy, and is convenient to install and debug.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a ship anchor winch load test device, including an anchor winch body, a hydraulic cylinder and a control console. A winch rope is wound on the drum of the anchor winch body, and a tension sensor is connected to the end of the winch rope away from the anchor winch body; the tension sensor is connected to the free end of the piston rod of the hydraulic cylinder. The hydraulic cylinder is provided with several connecting pipes, the two ends of which are respectively connected to the rod chamber and the rodless chamber of the hydraulic cylinder. An overflow valve and a control valve are installed on the connecting pipes. The overflow valve is used to adjust the oil flow pressure between the rod chamber and the rodless chamber of the hydraulic cylinder, and the control valve is used to control the opening and closing of the connecting pipes. A speed sensor is installed at the end of the hydraulic cylinder near the tension sensor to detect the extension and retraction speed of the piston rod. Floating adjustment supports are installed at both ends of the hydraulic cylinder, and the hydraulic cylinder is connected to the ground foundation through the floating adjustment supports. The control console is electrically connected to the tension sensor, speed sensor and relief valve respectively. It can display the tension value detected by the tension sensor and the speed value detected by the speed sensor in real time, and can output control signals to adjust the pressure parameters of each relief valve.

[0008] Furthermore, the floating adjustment support includes a base, an upper hoop ring, and a lower hoop ring. The upper hoop ring and the lower hoop ring cooperate and are sleeved on the outside of the oil cylinder. Locking elements are provided at both ends of the upper hoop ring and the lower hoop ring, which are clamped and fixed to the outer wall of the oil cylinder by the locking elements. The lower hoop is fixed with ear seats at both ends. The ear seats are located on the top of the base. An elastic element is provided between the ear seats and the base. The ear seats are connected to the base through the elastic element.

[0009] Furthermore, the elastic element includes an upper baffle, a lower baffle, a spring, an adjusting nut, and a limiting nut. A screw is fixed to the top wall of the base near the ear seat. The top end of the screw passes through the ear seat and is threadedly connected to the limiting nut. The upper baffle, spring, lower baffle, and adjusting nut are all located between the ear seat and the base. The spring is sleeved on the outside of the screw, and the upper and lower ends of the spring abut against the upper baffle and the lower baffle, respectively. The adjusting nut is threadedly connected to the screw and is located at the bottom of the lower baffle.

[0010] The beneficial effects of this utility model are: 1. This utility model's technical solution eliminates the need for a large test tower required by traditional testing devices, and adopts a direct connection structure between the anchor winch, hydraulic cylinder, and winch rope, significantly simplifying the overall equipment layout, reducing the floor space, and lowering testing costs. Simultaneously, the direct return channel between the rod-side and rodless chambers constructed through the connecting pipeline, combined with the precise pressure regulation of the overflow valve, effectively avoids back pressure resistance caused by poor hydraulic oil discharge when the anchor winch pulls the piston rod, ensuring that the piston rod extension and retraction speed matches the actual traction speed of the anchor winch, providing a true benchmark for speed testing.

[0011] 2. The design of this utility model's floating adjustable support combines buffering, self-adaptive adjustment, and convenient movement. Through the buffering effect of the elastic element, it can absorb vibrations during the test process, while compensating for unevenness of the ground foundation and height changes during rope winding, ensuring that the hydraulic cylinder is always in a horizontal force state, reducing the bending moment on the hydraulic cylinder piston rod, and extending the service life of the equipment. At the same time, the adjustable locking structure of the upper and lower hoop rings and the height adjustment function of the floating adjustable support enable the device to adapt to the test requirements of anchor winches of different tonnages, improving the versatility and applicability of the equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram illustrating the structure of the hydraulic cylinder in this utility model.

[0014] Figure 3 This is a schematic diagram illustrating the structure of the floating adjustment support in this utility model.

[0015] In the diagram: 1. Anchor winch body; 11. Winding rope; 2. Tension sensor; 3. Hydraulic cylinder; 31. Connecting pipe; 32. Overflow valve; 33. Control valve; 4. Floating adjustment support; 41. Base; 42. Upper hoop; 43. Lower hoop; 44. Locking element; 45. Ear seat; 46. Upper baffle; 47. Lower baffle; 48. Spring; 49. Adjusting nut; 410. Limit nut. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] This utility model discloses a ship anchor winch dynamic load test device.

[0018] Reference Figure 1-3 A ship anchor winch load test device includes an anchor winch body 1, a hydraulic cylinder 3, and a control console. The anchor winch body 1 is fixed to the ground foundation by anchor bolts. A winch rope 11 is wound on the drum of the anchor winch body 1, and a tension sensor 2 is connected to one end of the winch rope 11 away from the anchor winch body 1. The other end of the tension sensor 2 is coaxially connected to the free end of the piston rod of the hydraulic cylinder 3. This ensures that the tension direction of the winch rope 11 is completely consistent with the axis of the piston rod, which can avoid the additional radial force caused by the deviation of the force line, thereby eliminating the wear of the hydraulic cylinder 3 seals by the radial force and the interference of the tension detection accuracy.

[0019] Several connecting pipes 31 are provided outside the hydraulic cylinder 3. The two ends of the connecting pipes 31 are connected to the rod chamber and the rodless chamber of the hydraulic cylinder 3, respectively, forming a direct oil return channel from the rod chamber to the rodless chamber. The design principle of the connecting pipes 31 is that when the anchor winch pulls the piston rod to extend, the hydraulic oil in the rod chamber can flow into the rodless chamber quickly through the connecting pipes 31. The volume of the rodless chamber increases with the extension of the piston rod, which can accommodate the return oil. This avoids the pressure buildup phenomenon caused by the flow rate limitation when the oil is discharged through the return oil pipe in the traditional device. The core effect of this structure is to eliminate the obstruction of the piston rod movement by the back pressure of the rod chamber, ensure that the extension and retraction speed of the piston rod is consistent with the actual traction speed of the anchor winch, and provide a true detection benchmark for the speed sensor.

[0020] An overflow valve 32 and a control valve 33 are installed on the connecting pipe 31. The overflow valve 32 is used to regulate the oil flow pressure between the rod chamber and the rodless chamber. The overflow valve 32 is a pilot-operated overflow valve with a set pressure range of 0.3MPa-25MPa. Its working principle is to control the pressure loss of the oil flowing through the connecting pipe 31 by adjusting the valve opening. When the pressure in the rod chamber exceeds the set value, the overflow valve 32 automatically opens to relieve pressure, ensuring that the oil flow pressure is stable within the range required for the test and avoiding distortion of the tensile test caused by pressure fluctuations. The control valve 33 can be a manual or electromagnetic control valve, used to control the opening and closing of the connecting pipe 31. A sensor bracket is fixed on the outer wall of the end of the cylinder 3 near the tensile sensor 2. The speed sensor is horizontally mounted on the side of the piston rod through the bracket, and its detection end is parallel to the axial extension direction of the piston rod. In this embodiment, the speed sensor uses a laser Doppler speed sensor. Its working principle is to emit a laser beam to the surface of the piston rod and use the Doppler effect to detect the frequency change of the reflected light, thereby calculating the instantaneous extension and retraction speed of the piston rod. Compared with traditional gear speed measurement or displacement differential speed measurement, this sensor can directly output speed signals, avoiding mechanical transmission errors or differential calculation lag. The effect is to improve the speed measurement accuracy to ±0.2%FS and capture sudden changes in speed during dynamic loading.

[0021] The control console is electrically connected to the tension sensor 2, the speed sensor, and the overflow valve 32 respectively. It can display the tension value detected by the tension sensor 2 and the speed value detected by the speed sensor in real time, and can output control signals to adjust the pressure parameters of each overflow valve 32.

[0022] The hydraulic cylinder 3 is equipped with floating adjustment supports 4 at both ends. The hydraulic cylinder 3 is horizontally erected and fixed to the ground foundation through the floating adjustment supports 4. The core principle of this design is to use the "floating" characteristic of the floating adjustment supports 4 to compensate for installation errors or small displacements during the test process, and to avoid additional bending moments caused by the rigid fixation of the hydraulic cylinder 3.

[0023] The floating adjustment support 4 includes a base 41, an upper hoop 42, and a lower hoop 43. Both the upper hoop 42 and the lower hoop 43 are semi-circular arc structures. The inner arc surfaces of both are in contact with the outer wall of the cylinder 3, and wear-resistant rubber pads with a thickness of 3-5mm are attached to the inner arc surfaces. The principle is to increase the friction force through the elastic deformation of the rubber to enhance the fixing stability, while avoiding surface scratches caused by direct rigid contact between the metal hoop and the cylinder. Both ends of the upper hoop 42 and the lower hoop 43 extend outward to form flange ears. Each flange ear has coaxial bolt holes. The locking element 44 is a high-strength bolt and nut. The upper hoop 42 and the lower hoop 43 are tightly fixed to the outer wall of the cylinder 3 by the locking element 44 through the bolt holes.

[0024] Ear seats 45 are fixed at both ends of the lower hoop 43. The ear seats 45 are located on the top of the base 41. An elastic element is provided between the ear seats 45 and the base 41, and the ear seats 45 are connected to the base 41 through the elastic element. The elastic element includes an upper baffle 46, a lower baffle 47, a spring 48, an adjusting nut 49, and a limiting nut 410. A screw is vertically welded to the top wall of the base 41 near the ear seat 45. The top end of the screw passes through the ear seat 45 and is threadedly connected to the limiting nut 410. The upper baffle 46, spring 48, lower baffle 47, and adjusting nut 49 are all located between the ear seat 45 and the base 41. The spring 48 is sleeved on the outside of the screw, and the upper and lower ends of the spring 48 abut against the upper baffle 46 and the lower baffle 47, respectively. The adjusting nut 49 is threadedly connected to the screw and is located at the bottom of the lower baffle 47. The overall height of the hydraulic cylinder 3 can be changed by rotating the adjusting nut 49 to adapt to the test requirements of different anchor winches. The spring 48 can absorb vibrations during the test and compensate for minor unevenness of the ground foundation. The height change of the winch 11 during winding ensures that the hydraulic cylinder 3 is always in a horizontal force state. Rollers are installed on both sides of the bottom of the base 41 for easy retrieval and movement after the test is completed.

[0025] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A test device for the dynamic loading of a ship's anchor winch, characterized in that: The system includes an anchor winch body (1), a hydraulic cylinder (3), and a control console. A winch rope (11) is wound on the drum of the anchor winch body (1). A tension sensor (2) is connected to one end of the winch rope (11) away from the anchor winch body (1). The tension sensor (2) is connected to the free end of the piston rod of the hydraulic cylinder (3). The cylinder (3) is provided with several connecting pipes (31). The two ends of the connecting pipes (31) are respectively connected to the rod chamber and the rodless chamber of the cylinder (3). The connecting pipes (31) are provided with an overflow valve (32) and a control valve (33). The overflow valve (32) is used to adjust the oil flow pressure between the rod chamber and the rodless chamber of the cylinder (3). The control valve (33) is used to control the opening and closing of the connecting pipes (31). The cylinder (3) is provided with a speed sensor at one end near the tension sensor (2) to detect the extension and retraction speed of the piston rod of the cylinder (3). The cylinder (3) is provided with floating adjustment supports (4) at both ends. The cylinder (3) is connected to the ground foundation through the floating adjustment supports (4). The control console is electrically connected to the tension sensor (2), the speed sensor and the overflow valve (32) respectively. It can display the tension value detected by the tension sensor (2) and the speed value detected by the speed sensor in real time, and can output control signals to adjust the pressure parameters of each overflow valve (32).

2. The ship anchor winch load test device according to claim 1, characterized in that: The floating adjustment support (4) includes a base (41), an upper hoop (42) and a lower hoop (43). The upper hoop (42) and the lower hoop (43) are fitted together and sleeved on the outside of the oil cylinder (3). The upper hoop (42) and the lower hoop (43) are provided with locking parts (44) at both ends, which are used to hold and fix them to the outer wall of the oil cylinder (3). The lower hoop (43) has ear seats (45) fixed at both ends. The ear seats (45) are located on the top of the base (41). An elastic element is provided between the ear seats (45) and the base (41). The ear seats (45) are connected to the base (41) through the elastic element.

3. The ship anchor winch load test device according to claim 2, characterized in that: The elastic element includes an upper baffle (46), a lower baffle (47), a spring (48), an adjusting nut (49), and a limiting nut (410). A screw is fixed to the top wall of the base (41) near the ear seat (45). The top end of the screw passes through the ear seat (45) and is threadedly connected to the limiting nut (410). The upper baffle (46), spring (48), lower baffle (47), and adjusting nut (49) are all located between the ear seat (45) and the base (41). The spring (48) is sleeved on the outside of the screw, and the upper and lower ends of the spring (48) abut against the upper baffle (46) and the lower baffle (47) respectively. The adjusting nut (49) is threadedly connected to the screw and is located at the bottom of the lower baffle (47).

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