Hydraulic cylinder inner wall corrosion monitoring probe and monitoring method

Abstract

The present invention discloses a hydraulic cylinder inner wall corrosion monitoring probe and monitoring method, which relates to the field of hydraulic cylinder corrosion detection devices. The probe and monitoring method include a three-way pipe, with a first end of the three-way pipe connected to a liquid inlet and a second end connected to the hydraulic liquid, a base attached to the third end of the three-way pipe and connected to the third end, a fiber hose connected to the base and the other end extending from the second end into the hydraulic cylinder, a ball hinge and a pull wire attached to the fiber hose, the pull wire extending along the length of the fiber hose through a pull hole in the ball hinge, one end of the pull wire connected to an electric winch set, and a fixed end adjacent to the other end of the fiber hose, and a probe assembly fixedly attached to the other end of the fiber hose. The probe assembly, base, and fiber hose are connected to the hydraulic cylinder via the three-way pipe, and the probe assembly extends along the three-way pipe into the hydraulic cylinder, allowing for real-time detection of corrosion on the hydraulic cylinder inner wall while the hydraulic cylinder is operating, without the need to stop the hydraulic cylinder for detection or normal production.

Description

[Technical Field]

[0001] The present invention relates to the field of hydraulic cylinder corrosion detection devices, and more particularly to a hydraulic cylinder inner wall corrosion monitoring probe and monitoring method. [Background technology]

[0002] Corrosion is one of the main failure modes of hydraulic cylinders, which significantly affects their operating life. However, at present, the corrosion detection method for hydraulic cylinders is still limited to periodic inspections, which have poor aging properties and reduced detection efficiency, significantly affecting production efficiency. Therefore, it is urgent to propose a method for real-time monitoring of hydraulic cylinder corrosion.

[0003] Existing patent number CN2.2223219437.3 discloses an ultrasonic detection probe for detecting the inside of a long-distance pipeline. It belongs to the field of pipeline ultrasonic detection technology and includes a probe cabin and an externally mounted phased array probe. The phased array probe includes a plurality of ultrasonic probes uniformly arranged around the circumferential direction of the pipeline. Each ultrasonic probe covers a certain detection area around the circumferential direction, while two adjacent ultrasonic probes are arranged in a staggered pattern around the circumferential direction of the pipeline, allowing the phased array probe to achieve full coverage of the pipeline along the circumferential direction. The above device has a high integration density, a short length, a small volume, and strong passability. It can achieve high detection resolution in a small volume, reduce the requirements for the length of the sub-tube and the working space, and is easy to implement on-site. However, the above device has limitations in dealing with the high hydraulic operating environment encountered inside a hydraulic cylinder during operation. Furthermore, when adapting to geometric changes in the inner wall of a hydraulic cylinder, its mobility is somewhat limited, making it difficult to achieve flexible movement and precise positioning, making it difficult to meet the need for real-time monitoring of the condition of the inner wall of a hydraulic cylinder, especially when the pipe diameter inside the hydraulic cylinder is inconsistent or bent.

[0004] Therefore, how to provide an ultrasonic probe capable of monitoring corrosion on the inner wall of a hydraulic cylinder is a technical problem that must be solved as soon as possible by those skilled in the art. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] CN2.2223219437.3 Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydraulic cylinder inner wall corrosion monitoring probe that overcomes the problems of the prior art. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides the following solution: the present invention provides a hydraulic cylinder inner wall corrosion monitoring probe, the hydraulic cylinder is connected to hydraulic liquid through a liquid inlet; a three-way pipe having a first end communicating with the liquid inlet and a second end communicating with the hydraulic liquid; a base provided at a third end of the three-way pipe, communicating with the third end, having a gas regulating mechanism and a controller provided therein, the controller being electrically connected to the electric winch set; a fiber hose having one end communicating with the base and the other end extending from the second end into the hydraulic cylinder, a ball hinge and a plurality of pulling wires fixedly provided therein, the plurality of ball hinges being arranged along the length, the ball hinges penetrating the front and rear surfaces and having pulling holes, the pulling wires passing through the plurality of pulling holes in order, one end of the fiber hose extending into the base and connected to the electric winch set, the fixed end of the pulling wire being provided adjacent to the other end; a probe assembly fixedly mounted to the other end of the fiber hose, the probe assembly being in communication with the controller.

[0008] Furthermore, the probe assembly a probe housing fixedly connected to the other end of the fiber hose via a connector; a plurality of phased array ultrasonic probes provided in the probe housing along a circumferential direction; a data transmission line, one end of which is electrically connected to the phased array ultrasonic probe and the other end of which is electrically connected to the controller through hollow shafts at the centers of the plurality of ball hinges.

[0009] The device further includes an ultrasonic positioning probe and a water pressure sensor, the ultrasonic positioning probe and the water pressure sensor being provided at the head of the probe housing and electrically connected to the data transmission line.

[0010] Furthermore, the phased array ultrasonic probe is provided away from the connector.

[0011] Furthermore, the connector is rotatable.

[0012] Furthermore, the fiber hose is made of polyester fiber material.

[0013] Furthermore, an O-ring seal is provided at the connection point between the base and the third end and at the communication point between the first end and the liquid inlet, and is filled with pressure-resistant packing.

[0014] Furthermore, a dust ring is provided at a connection point between the base and the third end and at a communication point between the first end and the liquid inlet.

[0015] The present invention also provides a method for monitoring corrosion of the inner wall of a hydraulic cylinder, which comprises applying the above-mentioned hydraulic cylinder inner wall corrosion monitoring probe, adjusting a powered winch set to adjust the tension of the plurality of towing wires to bend the fiber hose and cause the probe assembly to enter a preset monitoring position within the hydraulic cylinder; determining whether a preset monitoring position has been reached by the ultrasonic positioning probe; monitoring the hydraulic pressure in the hydraulic cylinder with a water pressure sensor and adjusting the tension of the plurality of pulling wires in accordance with the monitored hydraulic pressure; The method includes the steps of detecting the circumferential thickness of the inner wall of the hydraulic cylinder using a phased array ultrasonic probe, transmitting the detected thickness data to a controller in the base via a data transmission line, and uploading the thickness data to a personal computer terminal for recording and analysis. [Effects of the Invention]

[0016] The present invention discloses the following technical effects.

[0017] 1. This invention can detect the corrosion condition of the inner wall of a hydraulic cylinder in real time. The probe assembly, base, and fiber hose are connected to the hydraulic cylinder via a three-way pipe. The probe assembly enters the hydraulic cylinder along the three-way pipe, allowing for real-time detection of the corrosion condition of the inner wall of the hydraulic cylinder while the hydraulic cylinder is operating. This eliminates the need to stop the hydraulic cylinder for detection and does not affect normal production, and provides an early warning function for hydraulic cylinder corrosion failure. This allows appropriate maintenance measures to be taken before the hydraulic cylinder corrosion develops further, thereby indirectly extending the life of the hydraulic cylinder.

[0018] 2. This application has excellent adaptability. For different types and models of hydraulic cylinders, all you need to do is replace the size of the three-way pipe and base, and there is no need to adjust other equipment structures.

[0019] 3. By adjusting the tension of the towing wire inside the fiber hose, the bending direction and degree of the fiber hose can be adjusted, allowing the fiber hose to adapt to geometric changes in the inner wall of the hydraulic cylinder. This improves the flexibility and accuracy of the probe assembly's movement, allowing the probe assembly to accurately move to the preset detection position to monitor the corrosion condition of the inner wall of the hydraulic cylinder.

[0020] 4. The connection point between the base and the third end of the three-way pipe and the connection point between the first end of the three-way pipe and the liquid inlet of the hydraulic cylinder are equipped with dust rings, O-ring seals, and pressure-resistant packing, which greatly improve the structural strength and pressure resistance of the connection points, prevent hydraulic liquid from leaking when the hydraulic cylinder is operating, and prevent external impurities and dust from entering the hydraulic system.

[0021] 5. The fiber hose is made of polyester fiber to ensure strength and corrosion resistance when used inside the hydraulic cylinder. [Brief explanation of the drawings]

[0022] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the drawings necessary for the embodiments will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without paying creative labor. [Figure 1] FIG. 2 is an installation view of the present invention in an operating state. [Figure 2] 1 is a structural diagram of the device of the present invention; [Figure 3] 1 is a diagram showing the internal structure of a fiber hose of the present invention. [Figure 4] FIG. 2 is a plan view showing the installation of the in-base electric winch set of the present invention. [Figure 5] FIG. 2 is a diagram showing the internal structure of a probe assembly. DETAILED DESCRIPTION OF THE INVENTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with accompanying drawings, but it is clear that the described embodiments are only a part of the embodiments of the present invention, and are not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any creative work fall within the scope of protection of the present invention.

[0024] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be described in more detail below in conjunction with the drawings and specific embodiments.

[0025] 1 to 5, the present invention provides a hydraulic cylinder inner wall corrosion monitoring probe, the hydraulic cylinder communicates with hydraulic liquid through a liquid inlet, a three-way pipe 2 having a first end communicating with the liquid inlet and a second end communicating with the hydraulic liquid, a base 1 provided at a third end of the three-way pipe 2 and communicating with the third end, having an electric winch set 1.1 and a controller therein, the electric winch set 1.1 being driven by a DC brushless motor 1.2, the controller being electrically connected to the DC brushless motor 1.2, and one end communicating with the base 1 and the other end extending from the second end into the hydraulic cylinder, having a ball The device includes a hinge 3.3 and a plurality of towing wires 3.2 fixedly mounted, a plurality of ball hinges 3.3 arranged along the length, the ball hinges 3.3 passing through the front and rear surfaces and having towing holes 3.4, the towing wires 3.2 passing through the plurality of towing holes 3.4 in sequence, one end of which extends into the base 1 and is connected to the electric winch set 1.1, the fixed end of the towing wire 3.2 being arranged adjacent to the other end, and a probe assembly 5, the probe assembly 5 being fixedly mounted to the other end of the fiber hose 3, and the probe assembly 5 being communicatively connected to the controller.

[0026] As shown in FIG. 5 , the probe assembly 5 includes a probe housing 5.4, which is fixedly connected to the other end of the fiber hose 3 via a connector 4, with the end sealed by a seal screw 5.6. The connector 4 is rotatable, which prevents hydraulic fluid from seeping into the probe housing 5.4 and improves sealing. The probe housing 5.4 can be connected and disconnected via a rotating mechanism, facilitating subsequent maintenance and replacement of the probe assembly 5. The phased array ultrasonic probe 5.5 includes multiple phased array ultrasonic probes 5.5, which are circumferentially mounted within the probe housing 5.4 and spaced apart from the connector 4. Each phased array ultrasonic probe 5.5 covers and monitors a portion of the inner wall of the hydraulic cylinder. The multiple phased array ultrasonic probes 5.5 are distributed circumferentially to monitor the entire inner wall of the hydraulic cylinder collectively. At the same time, the phased array ultrasonic probes 5.5 are spaced apart from the connector 4, thereby reducing the dead space monitoring range of the phased array ultrasonic probes 5.5. The data transmission line 3.1 has one end electrically connected to the phased array ultrasonic probe 5.5 and the other end electrically connected to the controller through the hollow shaft at the center of the ball hinges 3.3. In this embodiment, the data transmission line 3.1 is located at the center, and there are four pull wires 3.2, which are arranged parallel to the longitudinal direction of the fiber hose 3 through the pull holes 3.4 of the ball hinges 3.3. The pulling forces of the different pull wires 3.2 realize bending of the fiber hose 3 in different directions, pulling the probe assembly 5 and precisely controlling the position within the hydraulic cylinder, so that the phased array ultrasonic probe 5.5 reaches the preset detection position.

[0027] As shown in FIG. 5, this embodiment further includes an ultrasonic positioning probe 5.1 and a water pressure sensor 5.2. The ultrasonic positioning probe 5.1 and the water pressure sensor 5.2 are mounted on the open-ended seal screw 5.6 at the head of the probe assembly 5 and electrically connected to the data transmission line 3.1. The probe assembly 5 monitors the hydraulic cylinder while it is in operation. The ultrasonic positioning probe 5.1 and the water pressure sensor 5.2 measure the hydraulic pressure at the detection position. The phased array ultrasonic probe 5.5 adjusts its parameters, such as frequency, power, and pulse width, according to the measured hydraulic pressure. This allows the phased array ultrasonic probe 5.5 to transmit and receive signals in the hydraulic fluid, ensuring the accuracy of the detected thickness data of the hydraulic cylinder's inner wall and improving the effectiveness of corrosion detection of the hydraulic cylinder's inner wall. The ultrasonic positioning probe 5.1 can also confirm the position of the hydraulic cylinder's piston rod 6 and prevent collisions between the probe assembly 5 and the piston rod 6.

[0028] In this embodiment, O-ring seals are provided at the connection between the base 1 and the third end and at the communication between the first end and the liquid inlet, and pressure-resistant packing is filled in. Dust rings are provided at the connection between the base 1 and the third end and at the communication between the first end and the liquid inlet.

[0029] Hereinafter, a method for monitoring corrosion on the inner wall of a hydraulic cylinder will be described in combination with the above-mentioned hydraulic cylinder inner wall corrosion monitoring probe. As shown in FIG. 1, controlling the DC brushless motor 1.2 through the controller to adjust the electric winch set 1.1, and thus adjusting the tension of the multiple pulling wires 3.2, to bend the fiber hose 3 and make the probe assembly 5 enter the preset monitoring position in the hydraulic cylinder; a step of checking whether the ultrasonic positioning probe 5.1 has reached a preset monitoring position; a step of monitoring the hydraulic pressure in the hydraulic cylinder by a water pressure sensor 5.2 and adjusting the tension of the plurality of pulling wires 3.2 according to the monitored hydraulic pressure; The method includes steps of detecting the circumferential thickness of the inner wall of the hydraulic cylinder using the phased array ultrasonic probe 5.5, transmitting the detected thickness data to the controller in the base 1 via the data transmission line 3.1, and the controller uploading the thickness data to a computer terminal for recording and analysis. Specifically, the thickness data can be combined with image analysis software on the computer terminal to create an image of the inner wall of the hydraulic cylinder, allowing intuitive analysis and judgment of the corrosion status of the inner wall of the hydraulic cylinder.

[0030] In describing the present invention, it should be understood that any orientation or positional relationship indicated by the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., is based on the orientation or positional relationship shown in the drawings and is intended only to facilitate the description of the present invention, and is not intended to indicate or imply that the referred to device or element must have a particular orientation, be configured, or operate in a particular orientation, and therefore should not be construed as a limitation of the present invention.

[0031] The above-described embodiments merely illustrate preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical problems of the present invention without departing from the spirit of the design of the present invention should be included in the scope of protection defined by the claims of the present invention. [Explanation of symbols]

[0032] 1 base 2 three-way tube 3 Fiber hose 4 Connectors 5 Probe Assembly 6 Piston rod 1.1 Electric winch set 1.2 DC brushless motor 3.1 Data Transmission Lines 3.2 Towing wire 3.3 Ball hinge 3.4 Tow hole 5.1 Ultrasonic positioning probe 5.2 Water pressure sensor 5.3 Data Transmission Lines 5.4 Probe Housing 5.5 Phased array ultrasonic probe 5.6 Seal screw

Claims

1. A hydraulic cylinder inner wall corrosion monitoring probe, the hydraulic cylinder being in communication with hydraulic fluid via a fluid inlet; a three-way pipe (2) having a first end communicating with the liquid inlet and a second end communicating with the hydraulic liquid; a base (1) provided at a third end of the three-way pipe (2), communicating with the third end, having an electric winch set (1.1) and a controller provided therein, the controller being electrically connected to the electric winch set (1.1); a fiber hose (3) having one end communicating with the base (1) and the other end extending from the second end into the hydraulic cylinder, with a ball hinge (3.3) and a plurality of towing wires (3.2) fixedly provided therein, the plurality of ball hinges (3.3) arranged along the length, the ball hinges (3.3) passing through the front and rear surfaces, and towing holes (3.4), the towing wires (3.2) passing through the plurality of towing holes (3.4) in order, one end of the fiber hose extending into the base (1) and connected to the electric winch set (1.1), the fixed end of the towing wire (3.2) being provided adjacent to the other end; and a probe assembly (5), the probe assembly (5) being fixedly attached to the other end of the fiber hose (3), and the probe assembly (5) being communicatively connected to the controller.

2. The probe assembly (5) comprises: a probe housing (5.4) fixedly connected to the other end of the textile hose (3) via a connector (4); a plurality of phased array ultrasonic probes (5.5) arranged in the probe housing (5.4) along a circumferential direction; and a data transmission line (3.1), one end of the data transmission line (3.1) being electrically connected to the phased array ultrasonic probe (5.5) and the other end of the data transmission line (3.1) being electrically connected to the controller through a hollow shaft at the center of the plurality of ball hinges (3.3).

3. 3. The hydraulic cylinder inner wall corrosion monitoring probe according to claim 2, further comprising an ultrasonic positioning probe (5.1) and a water pressure sensor (5.2), the ultrasonic positioning probe (5.1) and the water pressure sensor (5.2) being provided in a head portion of the probe housing (5.4) and electrically connected to the data transmission line (3.1).

4. 3. The hydraulic cylinder inner wall corrosion monitoring probe according to claim 2, wherein the phased array ultrasonic probe (5.5) is provided away from the connector (4).

5. 3. The hydraulic cylinder inner wall corrosion monitoring probe according to claim 2, wherein the connector (4) is a rotary type.

6. 2. The hydraulic cylinder inner wall corrosion monitoring probe according to claim 1, wherein the fiber hose (3) is made of polyester fiber material.

7. 2. The hydraulic cylinder inner wall corrosion monitoring probe according to claim 1, characterized in that an O-ring seal is provided at the connection point between the base (1) and the third end and at the communication point between the first end and the liquid inlet, and a pressure-resistant packing is filled in the O-ring seal.

8. 8. The hydraulic cylinder inner wall corrosion monitoring probe according to claim 7, characterized in that a dust ring is provided at the connection point between the base (1) and the third end and at the communication point between the first end and the liquid inlet.

9. A method for monitoring corrosion of an inner wall of a hydraulic cylinder, comprising applying a hydraulic cylinder inner wall corrosion monitoring probe according to any one of claims 1 to 8, adjusting the electric winch set (1.1) to adjust the tension of the plurality of pulling wires (3.2) to bend the textile hose (3) and make the probe assembly (5) enter a preset monitoring position in the hydraulic cylinder; checking whether a preset monitoring position has been reached by the ultrasonic positioning probe (5.1); monitoring the hydraulic pressure in the hydraulic cylinder by a water pressure sensor (5.2) and adjusting the tension of the plurality of pulling wires (3.2) according to the monitored hydraulic pressure; detecting the circumferential thickness of the inner wall of the hydraulic cylinder using a phased array ultrasonic probe (5.5), transmitting the detected thickness data to a controller in the base (1) through a data transmission line (3.1), and the controller uploading the thickness data to a personal computer terminal for recording and analysis.

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