Pivot pin connector based method for leveling a floating platform

Abstract

The present application relates to a kind of based on pin shaft connector's floating platform leveling method, including double module floating platform;The structure of double module floating platform is as follows: including main module, auxiliary module, hydraulic rod, pin shaft, pressure sensor are installed in auxiliary module, auxiliary module is installed on auxiliary module sleeve, main module is installed on main module sleeve;Leveling includes the following steps: setting pressure threshold ΔF in advance on industrial computer;Formulate the signal return strategy of pressure sensor;Judge the real-time stress state of double module floating platform;Select corresponding load adjustment mode, until the signal combination returned by two pressure sensors on four pin shafts is all (00), corresponding pin shaft is driven by four hydraulic rods and pulled out from main module sleeve.The stress state of pin shaft connector is analyzed by pressure sensor signal combination, so that the accurate leveling of double module floating platform can be realized, the leveling success rate is effectively improved, the labor cost and time cost are reduced, and the leveling efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of marine engineering equipment technology, and in particular to a leveling method for a floating platform based on a pin-connector. Background Technology

[0002] The modules of the dual-module floating platform are connected by connectors. The connectors adopt a hinged connection method, and the main module and auxiliary module in the dual-module floating platform are connected or disconnected by hydraulic cylinders extending the hinge pins.

[0003] In actual operation, the center of gravity of this connector-based dual-module floating platform changes due to the fluctuations of waves, and interference occurs between different modules. This causes the connector pins to be in a pre-shear state, making it impossible to pull the pins out smoothly, which seriously affects the safety of the floating platform.

[0004] In existing technologies, a feeler gauge is typically inserted manually between the pin and bushing of a dual-module floating platform to determine the pre-shear direction of the pin, thereby leveling each module of the platform. This leveling method requires extremely high operator precision and has a low success rate on the first attempt, often requiring multiple measurements and load adjustments until the platform is leveled and the pin can be easily inserted and removed. During the leveling process, the operator must insert the feeler gauge multiple times and judge the gaps, which consumes a great deal of manpower and time, resulting in low efficiency. Summary of the Invention

[0005] To address the shortcomings of existing production technologies, this applicant provides a reasonably structured leveling method for floating platforms based on pin-shaft connectors. By analyzing the stress state of the pin-shaft connectors through a combination of pressure sensor signals, precise leveling of the dual-module floating platform can be achieved, effectively improving the leveling success rate, reducing labor and time costs, and increasing leveling efficiency.

[0006] The technical solution adopted in this invention is as follows:

[0007] A leveling method for a floating platform based on a pin connector, comprising a dual-module floating platform;

[0008] The structure of the dual-module floating platform is as follows: it includes a main module and an auxiliary module. The bow wall of the auxiliary module is provided with several auxiliary module protrusions arranged in the horizontal direction. Each auxiliary module protrusion corresponds to a groove in the main module. An auxiliary module groove is formed between two adjacent auxiliary module protrusions. The auxiliary module groove corresponds to a main module protrusion. Both the main module protrusion and the main module groove are provided on the bow wall of the main module.

[0009] The interior of a single auxiliary module protrusion is provided with a receiving space, in which a hydraulic rod arranged in a horizontal direction is installed, and the output end of the hydraulic rod is connected to a pin.

[0010] A through hole is opened on the side wall of a single auxiliary module protrusion, and an auxiliary module bushing is installed in the through hole. The auxiliary module bushings on two adjacent auxiliary module protrusions are arranged symmetrically.

[0011] Each auxiliary module bushing corresponds to a main module bushing, and the main module bushing is arranged on the inner wall surface of the main module protrusion;

[0012] Two pressure sensors are fitted onto the outer circumference of a single pin, and the two pressure sensors are symmetrically arranged along the vertical direction.

[0013] A single hydraulic rod drives the corresponding pin to move linearly in the horizontal direction, thereby simultaneously inserting it into the corresponding auxiliary module bushing and the main module bushing, and thus connecting the main module and the auxiliary module.

[0014] When the hydraulic rod drive pin disengages from the corresponding main module bushing, the interconnected main module and auxiliary module need to be leveled.

[0015] Leveling includes the following steps:

[0016] S1. Connect the eight pressure sensors to an external industrial control computer and pre-set the pressure threshold ΔF on the industrial control computer;

[0017] S2. Formulate a signal return strategy for the pressure sensor. The signal return strategy for the pressure sensor is as follows: when the pressure F collected by a single pressure sensor in real time is less than ΔF, the pressure sensor returns a signal of 0 to the industrial control computer.

[0018] When the pressure F collected in real time by a single pressure sensor is greater than or equal to ΔF, the pressure sensor returns signal 1 to the industrial control computer.

[0019] For a single pin, the signal combination returned by the two pressure sensors mounted on the pin includes (00), (01) and (10);

[0020] S3. Determine the real-time stress state of the dual-module floating platform based on the signal combination fed back to the industrial control computer from the eight pressure sensors;

[0021] S4. Based on the real-time stress state of the dual-module floating platform obtained in S3, select the corresponding load adjustment method until the signal combination returned by the two pressure sensors on the four pins is (00), and drive the corresponding pins out of the main module bushing through the four hydraulic rods.

[0022] As a further improvement to the above technical solution:

[0023] In S3, the real-time force state includes a pure compression state, a pure torsion state, or a combination of compression and torsion.

[0024] In S3, the signal combinations fed back to the industrial control computer from the eight pressure sensors include: zero-signal mode, 1-signal mode, 2-signal mode, 3-signal mode, and 4-signal mode.

[0025] The load adjustment method includes the following steps:

[0026] The load adjustment direction is to gradually adjust from multiple signal modes to at least one signal mode;

[0027] Observe the signal for changes after each load adjustment, and adjust the load slowly.

[0028] If the signal remains unchanged, the original load adjustment strategy continues; if the signal changes, a new load adjustment strategy is selected based on the new signal.

[0029] The front end of the pin adopts a streamlined design.

[0030] The pressure threshold ΔF has a range of 0 ≤ ΔF < Fmax, where Fmax represents the maximum range of the pressure sensor.

[0031] A single hydraulic rod is supported by a support rod.

[0032] The diameter of the main module bushing is larger than the diameter of the pin.

[0033] The diameter of the main module bushing is larger than the diameter of the auxiliary module bushing.

[0034] The beneficial effects of this invention are as follows:

[0035] The present invention has a reasonable step setting and is easy to operate. It designs a leveling method for a dual-module floating platform based on the concept of pressure sensors and signal analysis. It has the advantages of high leveling accuracy, short time consumption, high efficiency and high success rate, and has broad prospects for engineering applications.

[0036] This invention takes into account the complexity of the leveling process of a dual-module floating platform. It uses a pressure sensor to provide real-time, uninterrupted feedback on the pin force to guide the leveling work of the dual-module floating platform, thereby enabling high-efficiency insertion and removal of the pin connector of the dual-module floating platform.

[0037] The present invention also has the following advantages:

[0038] (1) The present invention replaces the manual feeler gauge with the combination of signals fed back by the pressure sensor, which can avoid human operation errors, improve the accuracy of operation, and save labor and time costs.

[0039] (2) The present invention visualizes the stress state of the pin through signal combination, thereby reflecting the stress state of the pin in real time, guiding the leveling of the dual-module floating platform and the insertion and removal of the pin, and improving the work efficiency.

[0040] (3) The present invention has a simple structure, is easy to operate, and has mature technology. It has good working stability, low manufacturing cost, and can be successfully applied in engineering practice. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure when the main module and auxiliary module are not fully connected in this invention.

[0042] Figure 2 This is a schematic diagram of the structure when the main module and auxiliary module are connected in this invention.

[0043] Figure 3 This is a schematic diagram of the pin connector in this invention.

[0044] Figure 4 This is a schematic diagram of the main module in this invention.

[0045] Figure 5 This is a schematic diagram of the auxiliary module in this invention.

[0046] Figure 6 This is a schematic diagram of the installation of the pressure sensor in this invention.

[0047] Figure 7 for Figure 6 A magnified view of a portion of point A in the middle.

[0048] The components are: 1. Main module; 101. Main module protrusion; 102. Main module groove; 2. Auxiliary module; 201. Auxiliary module protrusion; 202. Auxiliary module groove; 3. Main module bushing; 4. Auxiliary module bushing; 5. Accommodation space; 6. Hydraulic rod; 7. Support rod; 8. Pin; 9. Pressure sensor. Detailed Implementation

[0049] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0050] Example 1:

[0051] like Figures 1-7As shown, a leveling method for a floating platform based on a pin connector includes a dual-module floating platform. The structure of the dual-module floating platform is as follows: it includes a main module 1 and an auxiliary module 2. Several auxiliary module protrusions 201 arranged in the horizontal direction are provided on the stern wall of the auxiliary module 2. Each auxiliary module protrusion 201 corresponds to a groove 102 in the main module. An auxiliary module groove 202 is formed between two adjacent auxiliary module protrusions 201. The auxiliary module groove 202 corresponds to the main module protrusion 101. Both the main module protrusion 101 and the main module groove 102 are provided on the stern wall of the main module 1.

[0052] The leveling method in this embodiment is applied to a dual-module floating platform equipped with a pin connector, wherein, as shown in the example... Figures 1-2 As shown, for the dual-module floating platform, the docking part of the main module 1 and the auxiliary module 2 adopts a horizontal concave-convex joint connection type. The single main module protrusion 101 and the single main module groove 102 on the main module 1 are arranged sequentially at intervals along its stern wall, and correspond to the auxiliary module groove 202 and auxiliary module protrusion 201 on the auxiliary module 2, respectively.

[0053] The main modules 1 and 2 have the same main dimensions, and both are symmetrical about the mid-longitudinal section; for example Figure 3 As shown, the dual-module floating platform has four sets of independent pin connectors. The four sets of pin connectors are arranged on the same horizontal center line inside the stack, and two sets of each are arranged symmetrically about the longitudinal section.

[0054] like Figures 3-7 As shown, a single auxiliary module protrusion 201 has an internal accommodating space 5, in which a hydraulic rod 6 arranged horizontally is installed. The output end of the hydraulic rod 6 is connected to a pin 8. A through hole is opened on the side wall of a single auxiliary module protrusion 201, and an auxiliary module bushing 4 is installed in the through hole. The auxiliary module bushings 4 on two adjacent auxiliary module protrusions 201 are symmetrically arranged. A single auxiliary module bushing 4 corresponds to a main module bushing 3, and the main module bushing 3 is arranged on the inner side wall of the main module protrusion 101. Two pressure sensors 9 are installed on the outer circumferential surface of a single pin 8, and the two pressure sensors 9 are symmetrically arranged vertically.

[0055] In this embodiment, among the four sets of pin connectors, except for the front end of the main module bushing 3 which is arranged inside the main module 1, the rest of the structures are arranged inside the auxiliary module 2.

[0056] A single set of pin connectors includes a hydraulic rod 6, a support rod 7 and a pin 8 arranged in the accommodating space 5. The front end of a single pin 8 adopts a streamlined design, and two pressure sensors 9 are installed on its outer circumference near the front end. The two pressure sensors 9 can reflect the pressure on the pin 8 at that point in real time.

[0057] A single hydraulic rod 6 is supported by a support rod 7. The output end of the hydraulic rod 6 is connected to the rear end of the pin 8 by a bolt, thereby driving the pin to complete the insertion and removal action. The main module bushing 3 is set on the main module protrusion 101. The diameter of the main module bushing 3 is larger than the diameter of the pin 8. The auxiliary module bushing 4 is set on the auxiliary module protrusion 201. The diameter of the main module bushing 3 is larger than the diameter of the auxiliary module bushing 4. Therefore, the pre-shear force on the pin 8 is caused by the change in the gap between the front half of the pin 8 and the main module bushing 3.

[0058] A single hydraulic rod 6 drives the corresponding pin 8 to move linearly in the horizontal direction, thereby simultaneously inserting it into the corresponding auxiliary module bushing 4 and main module bushing 3, thus connecting the main module 1 and auxiliary module 2. Since both the pin 8 and the auxiliary module bushing 4 are installed inside the auxiliary module 2, ensuring that the pin 8 and the auxiliary module bushing 4 are concentric during the assembly of the pin connector will ensure that the pin 8 can be smoothly pulled out from the main module bushing 3 later.

[0059] Since the main module bushing 3 is installed on the main module 1, when the hydraulic rod 6 drives the pin 8 to disengage from the corresponding main module bushing 3, the interconnected main module 1 and auxiliary module 2 need to be leveled to ensure that the pin 8 can be smoothly pulled out from the corresponding main module bushing 3.

[0060] Leveling includes the following steps:

[0061] S1. Connect the eight pressure sensors 9 to an external industrial control computer, and pre-set the pressure threshold ΔF on the industrial control computer. The pressure threshold ΔF represents the maximum pressure that the pressure sensor 9 can withstand when the pin 8 can be pulled out smoothly.

[0062] S1.1. The range of the pressure threshold ΔF is: 0≤ΔF<Fmax, where Fmax represents the maximum range of the pressure sensor 9;

[0063] S2. Formulate the signal return strategy of pressure sensor 9. The signal return strategy of pressure sensor 9 is as follows: when the pressure F collected by a single pressure sensor 9 in real time is less than ΔF, the pressure sensor 9 returns a signal 0 to the industrial control computer.

[0064] When the pressure F collected in real time by a single pressure sensor 9 is greater than or equal to ΔF, the pressure sensor 9 returns signal 1 to the industrial control computer.

[0065] For a single pin 8, the signal combination returned by the two pressure sensors 9 mounted on the pin 8 includes (00), (01) and (10);

[0066] Two pressure sensors 9 are symmetrically mounted on the outer circumference of the corresponding pin 8. The signal returned by the upper pressure sensor 9 corresponds to the left position signal in the signal combination, and the signal returned by the lower pressure sensor 9 corresponds to the right position signal in the signal combination. That is, the signal combination (10) represents that on a certain pin 8, the upper pressure sensor 9 returns signal 1 and the lower pressure sensor 9 returns signal 0.

[0067] S2.1. Label the four pins 8 from left to right along their installation direction as the first pin, the second pin, the third pin, and the fourth pin. Correspondingly, label the pressure sensors 9 as the upper sensor of the first pin, the lower sensor of the first pin, the upper sensor of the second pin, the lower sensor of the second pin, the upper sensor of the third pin, the lower sensor of the third pin, the upper sensor of the fourth pin, and the lower sensor of the fourth pin. Under actual working conditions, the commonly used signal combinations for feedback to the industrial control computer from the eight pressure sensors 9 are shown in Table 1.

[0068] Table 1. Summary of Feedback Signal Combinations for Pin Connectors (Partial)

[0069]

[0070] The pin 8 can be pulled out by the hydraulic rod 6 only if the signal combination is (00000000);

[0071] S3. Determine the real-time stress state of the dual-module floating platform based on the signal combination fed back to the industrial control computer from the eight pressure sensors 9;

[0072] S3.1. Real-time stress state includes pure compression state, pure torsion state, or a combination of compression and torsion state;

[0073] Taking the main module 1 as the reference, if the auxiliary module 2 has an overall upward motion tendency relative to the main module 1, then the main module 1 is said to be subjected to a pure compressive (upward) load from the auxiliary module 2.

[0074] If the auxiliary module 2 has a tendency to move clockwise about the platform centerline relative to the main module 1 with the port side up and the starboard side down, then the main module 1 is said to be subjected to a pure torsional (clockwise) load from the auxiliary module 2.

[0075] Under actual working conditions, due to the influence of oil, water, spare parts and external environment, the relative motion trend between the main module 1 and the auxiliary module 2 is more complex, usually a pressure-torsion combination state under the superposition of pure pressure and pure torsion.

[0076] S3.2. The signal combinations fed back to the industrial control computer from the eight pressure sensors 9 include: zero-signal mode, signal 1 mode, signal 2 mode, signal 3 mode, and signal 4 mode;

[0077] The signal combination corresponding to the zero-return signal mode is (00000000).

[0078] A signal mode 1 corresponds to a signal combination that contains a "1", such as (10000000) or (00000001).

[0079] The 2-signal mode corresponds to a signal combination containing two "1"s, such as (10000001) and (00000101).

[0080] The 3-signal mode corresponds to a signal combination containing three "1"s, such as (10100001) and (00010101).

[0081] The 4-signal mode corresponds to a signal combination containing four "1"s, such as (10101010) and (01010101).

[0082] S4. Based on the real-time stress state of the dual-module floating platform obtained in S3, select the corresponding load adjustment method until the signal combination returned by the two pressure sensors 9 on the four pins 8 is (00), and drive the corresponding pins 8 out of the main module bushing 3 through the four hydraulic rods 6.

[0083] S4.1. The load adjustment method includes the following steps:

[0084] The load adjustment direction is to gradually adjust from multiple signal modes to at least one signal mode, that is, from 4 signal modes to 3 signal modes, 2 signal modes, 1 signal mode, until the zero signal mode is returned.

[0085] Observe the signal for changes after each load adjustment, and adjust the load slowly.

[0086] For the pin connector feedback signal combinations shown in Table 1, some signal combinations correspond to a specific stress state. For such signal combinations, a load adjustment strategy of adjusting pressure or torque is adopted. If the signal does not change, the original load adjustment strategy continues; if the signal changes, a new load adjustment strategy is selected based on the new signal.

[0087] Another part of the signal combinations may correspond to multiple stress states. For this type of signal combination, a load adjustment strategy of adjusting pressure is adopted. If the signal does not change, the original load adjustment strategy continues; if the signal changes, a new load adjustment strategy is selected based on the new signal.

[0088] Example 2:

[0089] This embodiment uses a floating platform leveling method based on a pin connector provided in Embodiment 1, taking the signal combination (10101001) as an example for specific explanation;

[0090] For signal combination (10101001), which is a 4-signal mode, the corresponding force state is a pressure-torsion combined state. Selecting the torque adjustment load adjustment strategy changes the signal combination to a 3-signal mode (00101001). Based on the force state corresponding to the 3-signal mode (00101001), select the corresponding load adjustment strategy to change the signal combination to a 2-signal mode. Based on the force state corresponding to the 2-signal mode, select the corresponding load adjustment strategy to change the signal combination to a 1-signal mode. Based on the force state corresponding to the 1-signal mode, select the corresponding load adjustment strategy to change the signal combination to a zero signal mode (00000000). At this time, the hydraulic rod 6 drives the pin 8 to be pulled out from the main module bushing 3.

[0091] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A leveling method for a floating platform based on a pin connector, characterized in that: Including dual-module floating platforms; The structure of the dual-module floating platform is as follows: it includes a main module (1) and an auxiliary module (2). The bow wall of the auxiliary module (2) is provided with several auxiliary module protrusions (201) arranged in the horizontal direction. Each auxiliary module protrusion (201) corresponds to a main module groove (102). An auxiliary module groove (202) is formed between two adjacent auxiliary module protrusions (201). The auxiliary module groove (202) corresponds to the main module protrusion (101). Both the main module protrusion (101) and the main module groove (102) are provided on the bow wall of the main module (1). The interior of a single auxiliary module protrusion (201) is provided with a accommodating space (5), and a hydraulic rod (6) arranged in a horizontal direction is installed in the accommodating space (5). The output end of the hydraulic rod (6) is connected to a pin (8). A through hole is opened on the side wall of a single auxiliary module protrusion (201), and an auxiliary module bushing (4) is installed in the through hole. The auxiliary module bushings (4) on two adjacent auxiliary module protrusions (201) are arranged symmetrically. A single auxiliary module bushing (4) corresponds to a main module bushing (3), and the main module bushing (3) is arranged on the inner wall surface of the main module protrusion (101); Two pressure sensors (9) are fitted on the outer circumference of a single pin (8), and the two pressure sensors (9) are arranged symmetrically in the vertical direction. A single hydraulic rod (6) drives the corresponding pin (8) to move linearly in the horizontal direction, thereby simultaneously inserting into the corresponding auxiliary module bushing (4) and main module bushing (3), and then connecting the main module (1) and auxiliary module (2). When the hydraulic rod (6) drives the pin (8) to disengage from the corresponding main module bushing (3), the main module (1) and auxiliary module (2) that are connected to each other need to be leveled. Leveling includes the following steps: S1. Connect the eight pressure sensors (9) to an external industrial control computer and pre-set the pressure threshold ΔF on the industrial control computer; S2. Formulate a signal return strategy for the pressure sensor (9). The signal return strategy for the pressure sensor (9) is as follows: when the pressure F collected by a single pressure sensor (9) in real time is less than ΔF, the pressure sensor (9) returns a signal 0 to the industrial control computer. When the pressure F collected in real time by a single pressure sensor (9) is greater than or equal to ΔF, the pressure sensor (9) returns signal 1 to the industrial control computer. For a single pin (8), the signal combination returned by the two pressure sensors (9) mounted on the pin (8) includes (00), (01) and (10); S3. Based on the signal combination fed back to the industrial control computer from the eight pressure sensors (9), determine the real-time stress state of the dual-module floating platform; S4. Based on the real-time stress state of the dual-module floating platform obtained in S3, select the corresponding load adjustment method until the signal combination returned by the two pressure sensors (9) on the four pins (8) is (00), and drive the corresponding pins (8) to be pulled out from the main module bushing (3) through the four hydraulic rods (6); During the leveling process of the dual-module floating platform, the force feedback of the pin shaft is provided in real time through pressure sensors; the force status of the pin shaft is reflected in real time through signal combinations.

2. The leveling method for a floating platform based on a pin connector as described in claim 1, characterized in that: In S3, the real-time force state includes a pure compression state, a pure torsion state, or a combination of compression and torsion.

3. The leveling method for a floating platform based on a pin connector as described in claim 1, characterized in that: In S3, the signal combinations fed back to the industrial control computer by the eight pressure sensors (9) include: zero signal mode, 1 signal mode, 2 signal mode, 3 signal mode, and 4 signal mode.

4. The leveling method for a floating platform based on a pin connector as described in claim 3, characterized in that: The load adjustment method includes the following steps: The load adjustment direction is to gradually adjust from multiple signal modes to at least one signal mode; Observe the signal for changes after each load adjustment, and adjust the load slowly. If the signal does not change, continue with the original load adjustment strategy; If the signal changes, a new load adjustment strategy is selected based on the new signal.

5. The leveling method for a floating platform based on a pin connector as described in claim 1, characterized in that: The front end of the pin (8) adopts a streamlined design.

6. The leveling method for a floating platform based on a pin connector as described in claim 1, characterized in that: The pressure threshold ΔF has the following range: 0 ≤ ΔF < Fmax, where Fmax represents the maximum range of the pressure sensor (9).

7. The leveling method for a floating platform based on a pin connector as described in claim 1, characterized in that: A single hydraulic rod (6) is supported by a support rod (7).

8. The leveling method for a floating platform based on a pin connector as described in claim 1, characterized in that: The diameter of the main module bushing (3) is greater than the diameter of the pin (8).

9. The leveling method for a floating platform based on a pin connector as described in claim 1, characterized in that: The diameter of the main module bushing (3) is greater than the diameter of the auxiliary module bushing (4).

Images