A device for detecting the swing stability of a boom of a shipboard supply crane

Abstract

The utility model discloses a kind of stability detection device of swing of shipborne supply crane's boom, including tower body, boom and hydraulic cylinder, hydraulic cylinder drives boom relative tower body pitch swing;It further includes at least one elastic self-checking connecting part, its two ends are respectively articulated with boom, hydraulic cylinder, elastic self-checking connecting part is built-in pressure sensor and elastic element, by telescopic deformation with boom swing real-time detection elastic force change, to feedback boom swing stability.The utility model is through the real-time deformation and pressure detection of elastic self-checking connecting part, solve the problem that traditional boom swing stability monitoring precision is low, anti-interference is poor, improve the reliability and environmental adaptability of dynamic load feedback.

Description

Technical Field

[0001] This utility model belongs to the field of shipborne supply crane technology, and particularly relates to a device for detecting the stability of the boom swing of a shipborne supply crane. Background Technology

[0002] When a shipborne supply crane operates at sea, the stability of its boom's swing directly affects the efficiency and safety of cargo loading and unloading. Traditional detection methods often employ external tilt sensors or visual monitoring systems, but these have significant drawbacks: tilt sensors can only indirectly reflect changes in the boom angle and are unable to capture dynamic load fluctuations; visual monitoring is susceptible to interference from the harsh marine environment, resulting in a high rate of misjudgment. Furthermore, the mechanical coupling between the hydraulic drive system and the boom is complex, and current technologies lack real-time monitoring of the direct forces between the hydraulic cylinders and the boom, leading to delayed stability assessments. Some solutions attempt to integrate pressure sensors into the hydraulic circuit, but factors such as hydraulic oil temperature drift and leakage can easily cause signal distortion. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a device for detecting the swing stability of a shipborne supply crane boom. By detecting the real-time deformation and pressure of the elastic self-testing connection, it solves the problems of low accuracy and poor anti-interference of traditional boom swing stability monitoring, and improves the reliability and environmental adaptability of dynamic load feedback.

[0004] Technical solution: To achieve the above objectives, this utility model provides a device for detecting the swing stability of a shipborne supply crane boom, comprising a tower, a boom, and a hydraulic cylinder, wherein the hydraulic cylinder drives the boom to swing relative to the tower in pitch.

[0005] It also includes at least one elastic self-testing connection, with its two ends hinged to the boom and hydraulic cylinder respectively. The elastic self-testing connection has a built-in pressure sensor and elastic element, which detects the change of elastic force in real time by the expansion and contraction deformation of the boom to provide feedback on the stability of the boom swing amplitude.

[0006] Furthermore, the boom is provided with boom lugs, the hydraulic cylinder is provided with at least one cylinder lug, and the two ends of the elastic self-testing connection are respectively connected to the boom lug and the cylinder lug via hinge shafts.

[0007] Furthermore, the cylinder lifting lug is located on the cylinder body of the hydraulic cylinder, and the boom lifting lug is located at the bottom of the boom, so that the elastic self-testing connection connects the bottom of the boom to the cylinder body of the hydraulic cylinder.

[0008] Furthermore, the elastic self-testing connection part includes an outer telescopic rod part and an inner elastic force detection part. The two ends of the outer telescopic rod part are respectively connected to the boom lug and the cylinder lug through hinge shafts. The inner elastic force detection part is coaxially arranged inside the outer telescopic rod part.

[0009] Furthermore, the internal elastic force detection unit is composed of the elastic element and the pressure sensor connected in series.

[0010] Furthermore, the elastic self-testing connection includes a first elastic self-testing connection and a second elastic self-testing connection, which are connected between the boom and the hydraulic cylinder to form a double elastic self-testing connection mechanism.

[0011] Furthermore, the heads of the first elastic self-testing connection and the second elastic self-testing connection are connected to the same boom lug via the same hinge shaft, and the tails of the first elastic self-testing connection and the second elastic self-testing connection are connected to their respective hydraulic cylinder lugs via independent hinge shafts.

[0012] Furthermore, the first elastic self-testing connection and the second elastic self-testing connection are located within a triangular area formed by the tower body hinge point, the boom hinge point, and the hydraulic cylinder hinge point.

[0013] Beneficial effects: This utility model directly reflects the dynamic load changes during the boom swing process by using the signal output of the elastic element and pressure sensor, and links the elastic force change with stability to realize the real-time judgment of the boom's working status. It solves the problems of low accuracy and poor anti-interference of traditional boom swing stability monitoring, and improves the reliability and environmental adaptability of dynamic load feedback. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a structural diagram of the tower body, boom, hydraulic cylinders, and flexible self-checking connection. Detailed Implementation

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

[0017] like Figure 1 and Figure 2As shown, a device for detecting the swing stability of a shipborne supply crane includes a tower body 1, a boom 2, and a hydraulic cylinder 3. The hydraulic cylinder 3 drives the boom 2 to swing relative to the tower body 1. It also includes at least one elastic self-checking connection 4, with its two ends hinged to the boom 2 and the hydraulic cylinder 3 respectively. The elastic self-checking connection 4 has a built-in pressure sensor and an elastic element. It detects changes in elastic force in real time by measuring the expansion and contraction deformation of the boom 2 during its swing, thus providing feedback on the swing stability of the boom 2. This invention directly reflects the dynamic load changes during the swing of the boom 2 through the signal output of the elastic element and the pressure sensor, linking the elastic force change with stability, achieving real-time judgment of the working state of the boom 2. This solves the problems of low accuracy and poor anti-interference of traditional boom swing stability monitoring, improving the reliability and environmental adaptability of dynamic load feedback.

[0018] like Figure 2 As shown, the boom 2 is provided with boom lugs 20, and the hydraulic cylinder 3 is provided with at least one cylinder lug 30. The two ends of the elastic self-checking connection part 4 are respectively connected to the boom lug 20 and the cylinder lug 30 via hinge shafts. The hinge shaft connection method ensures the swing freedom of the elastic self-checking connection part 4, thereby adapting to the angle changes during the pitching motion of the boom 2.

[0019] The cylinder lug 30 is located on the cylinder body of the hydraulic cylinder 3, and the boom lug 20 is located at the bottom of the boom 2, so that the elastic self-testing connection part 4 connects the bottom of the boom 2 to the cylinder body of the hydraulic cylinder 3. By setting the detection point between the bottom of the boom 2 and the cylinder body of the hydraulic cylinder 3, the change in reaction force when the hydraulic system drives the boom 2 is directly monitored. The bottom position of the boom 2 is significantly affected by external loads (such as cargo swaying), making the detection data more representative.

[0020] like Figure 2 As shown, the elastic self-testing connection part 4 includes an outer telescopic rod part 41 and an inner elastic force detection part 42. The two ends of the outer telescopic rod part 41 are respectively connected to the boom lug 20 and the cylinder lug 30 through hinge shafts. The inner elastic force detection part 42 is coaxially arranged inside the outer telescopic rod part 41. The outer telescopic rod part 41 provides mechanical support and transmits deformation, while the inner elastic force detection part 42 is dedicated to pressure detection. The division of labor is clear, and the outer telescopic rod part 41 protects the internal detection elements (such as pressure sensors) from external impacts, corrosion, and other environmental influences.

[0021] More specifically, the internal elastic force detection unit 42 is composed of the elastic element and the pressure sensor connected in series. The deformation of the elastic element corresponds linearly with the output signal of the pressure sensor, improving detection accuracy. The elastic element serves as both a deformation carrier and a pressure buffer, preventing overload damage to the sensor.

[0022] The elastic self-testing connection part 4 includes a first elastic self-testing connection part 4.1 and a second elastic self-testing connection part 4.2. The first elastic self-testing connection part 4.1 and the second elastic self-testing connection part 4.2 are connected between the boom 2 and the hydraulic cylinder 3, forming a dual elastic self-testing connection mechanism. The heads of the first elastic self-testing connection part 4.1 and the second elastic self-testing connection part 4.2 are connected to the same boom lug 20 via the same hinge shaft, and the tails of the first elastic self-testing connection part 4.1 and the second elastic self-testing connection part 4.2 are respectively connected to their corresponding hydraulic cylinder lugs 30 via independent hinge shafts. The dual elastic self-testing connection mechanism provides redundant data, which can eliminate single-point detection errors through comparison, thus enhancing reliability.

[0023] The first elastic self-checking connection part 4.1 and the second elastic self-checking connection part 4.2 are located within a triangular area formed by the hinge point of the tower body 1, the hinge point of the boom 2, and the hinge point of the hydraulic cylinder 3. The triangular area is a mechanically stable structure, ensuring that the dual elastic self-checking connection mechanism is always within a reasonable stress range when the boom 2 swings. The triangular layout automatically adjusts the angle with the pitch of the boom 2, avoiding jamming of the connection part due to extreme positions.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for detecting the swing stability of a shipborne supply crane, comprising a tower body (1), a boom (2) and a hydraulic cylinder (3), wherein the hydraulic cylinder (3) drives the boom (2) to swing relative to the tower body (1); Its features are: It also includes at least one elastic self-testing connection part (4), which is hinged to the boom (2) and the hydraulic cylinder (3) at both ends respectively. The elastic self-testing connection part (4) has a built-in pressure sensor and elastic element. It detects the change of elastic force in real time by the expansion and contraction deformation of the boom (2) to provide feedback on the swing stability of the boom (2).

2. The device for detecting the boom swing stability of a shipborne supply crane according to claim 1, characterized in that: The boom (2) is provided with boom lugs (20), and the hydraulic cylinder (3) is provided with at least one cylinder lug (30). The two ends of the elastic self-testing connection part (4) are respectively connected to the boom lugs (20) and the cylinder lugs (30) through hinge shafts.

3. The device for detecting the boom swing stability of a shipborne supply crane according to claim 2, characterized in that: The cylinder lug (30) is located on the cylinder body of the hydraulic cylinder (3), and the boom lug (20) is located at the bottom of the boom (2), so that the elastic self-testing connection (4) connects the bottom of the boom (2) to the cylinder body of the hydraulic cylinder (3).

4. The device for detecting the boom swing stability of a shipborne supply crane according to claim 3, characterized in that: The elastic self-testing connection part (4) includes an outer telescopic rod part (41) and an inner elastic force detection part (42). The two ends of the outer telescopic rod part (41) are respectively connected to the boom lug (20) and the cylinder lug (30) through hinge shafts. The inner elastic force detection part (42) is coaxially arranged inside the outer telescopic rod part (41).

5. The device for detecting the boom swing stability of a shipborne supply crane according to claim 4, characterized in that: The internal elastic force detection unit (42) is composed of the elastic element and the pressure sensor connected in series.

6. The device for detecting the boom swing stability of a shipborne supply crane according to claim 4, characterized in that: The elastic self-testing connection part (4) includes a first elastic self-testing connection part (4.1) and a second elastic self-testing connection part (4.2). The first elastic self-testing connection part (4.1) and the second elastic self-testing connection part (4.2) are connected between the boom (2) and the hydraulic cylinder (3) to form a double elastic self-testing connection mechanism.

7. The device for detecting the boom swing stability of a shipborne supply crane according to claim 6, characterized in that: The heads of the first elastic self-testing connection part (4.1) and the second elastic self-testing connection part (4.2) are connected to the same boom lug (20) through the same hinge shaft, and the tails of the first elastic self-testing connection part (4.1) and the second elastic self-testing connection part (4.2) are connected to their respective hydraulic cylinder lugs (30) through independent hinge shafts.

8. The device for detecting the boom swing stability of a shipborne supply crane according to claim 7, characterized in that: The first elastic self-testing connection (4.1) and the second elastic self-testing connection (4.2) are located in the triangular area formed by the hinge point of the tower body (1), the hinge point of the boom (2) and the hinge point of the hydraulic cylinder (3).

Images