Monitoring probe and monitoring method for corrosion of inner wall of hydraulic cylinder

Abstract

A monitoring probe and monitoring method for corrosion of the inner wall of a hydraulic cylinder. The monitoring probe comprises: a three-way pipe (2), wherein the three-way pipe (2) has a first end communicated with a liquid inlet and a second end communicated with a hydraulic liquid; a base (1) provided at a third end of the three-way pipe (2) and communicated with the third end; a fiber hose (3) having one end communicated with the base (1) and the other end extending into a hydraulic cylinder from the second end, wherein spherical hinges (3.3) and traction wires (3.2) are provided in the fiber hose (3), the traction wires (3.2) pass through traction holes (3.4) of the spherical hinges (3.3) and are arranged along the length direction of the fiber hose (3), one ends of the traction wires (3.2) are communicated with electric winch sets (1.1), and fixing ends of the traction wires (3.2) are arranged close to the other end of the fiber hose (3); and a probe assembly (5) fixedly arranged at the other end of the fiber hose (3). The probe assembly (5), the base (1) and the fiber hose (3) are communicated with the hydraulic cylinder by means of the three-way pipe (2), and the probe assembly (5) enters the hydraulic cylinder along the three-way pipe (2) and can monitor in real time a corrosion condition of the inner wall of the hydraulic cylinder in a working state of the hydraulic cylinder, so that the hydraulic cylinder does not need to be stopped for monitoring, and normal production is not affected.

Description

Hydraulic cylinder inner wall corrosion monitoring probe and monitoring method Technical Field

[0001] The present invention relates to the field of hydraulic cylinder corrosion detection equipment, and in particular to a hydraulic cylinder inner wall corrosion monitoring probe and a monitoring method. Background Art

[0002] Corrosion is one of the main failure modes of hydraulic cylinders, seriously affecting their service life. However, current methods for detecting corrosion in hydraulic cylinders still rely on periodic inspections, which are time-consuming and inefficient, significantly impacting production efficiency. Therefore, a method for real-time monitoring of hydraulic cylinder corrosion is urgently needed.

[0003] Patent No. CN2.2223219437.3 discloses an ultrasonic inspection probe for long-distance pipeline inspection. This device belongs to the field of ultrasonic pipeline inspection technology. It comprises a probe chamber and a phased array probe mounted externally. The phased array probe includes multiple ultrasonic probes evenly distributed along the circumference of the pipeline within the probe chamber. Each ultrasonic probe covers a specific circumferential inspection area. Adjacent ultrasonic probes are staggered along the circumference of the pipeline, enabling full circumferential coverage of the pipeline. The device features high integration, a short length and compact size, and excellent throughput. It achieves high inspection resolution in a compact footprint, reduces the length of the barrel and the required operating space, and facilitates on-site implementation. However, this device has limitations in handling the high hydraulic pressure environment encountered within a hydraulic cylinder during operation. Furthermore, its mobility is limited when dealing with geometric variations in the cylinder's inner wall, making it difficult to achieve flexible movement and accurate positioning, making it difficult to meet the requirements for real-time monitoring of the cylinder's inner wall condition. This problem is particularly prominent when the cylinder's internal pipe diameters are inconsistent or curved.

[0004] In view of this, how to provide an ultrasonic probe capable of monitoring the corrosion of the inner wall of a hydraulic cylinder is a technical problem that urgently needs to be solved by people in this field.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide a hydraulic cylinder inner wall corrosion monitoring probe to solve the problems existing in the prior art.

[0007] To achieve the above-mentioned 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 the hydraulic fluid through the liquid inlet, comprising:

[0008] a tee pipe, a first end of which is connected to the liquid inlet, and a second end of which is connected to the hydraulic fluid;

[0009] a base, the base being disposed at the third end of the tee pipe and in communication with the third end, the base being provided with a gas regulating mechanism and a controller, the controller being electrically connected to the electric winch unit;

[0010] A fiber hose, one end of the fiber hose is connected to the base, and the other end extends from the second end into the hydraulic cylinder. A ball hinge and multiple traction lines are fixedly provided in the fiber hose. There are multiple ball hinges and they are arranged along the length direction of the fiber hose. The ball hinge is provided with traction holes on the front and rear surfaces. The traction lines pass through the multiple traction holes in sequence, and one end of the fiber hose extends into the base and is connected to the electric winch unit. The fixed end of the traction line is provided near the other end of the fiber hose.

[0011] A probe assembly is fixedly arranged at the other end of the fiber hose, and the probe assembly is communicatively connected with the controller.

[0012] Furthermore, the probe assembly includes:

[0013] A probe housing, the probe housing being fixedly connected to the other end of the fiber hose via a connector;

[0014] a phased array ultrasonic probe, wherein a plurality of the phased array ultrasonic probes are circumferentially arranged in the probe housing;

[0015] A data transmission line, one end of which is electrically connected to the phased array ultrasonic probe, and the other end of which passes through the hollow shafts in the middle of the plurality of ball hinges and is electrically connected to the controller.

[0016] Furthermore, it also includes: an ultrasonic positioning probe and a water pressure sensor, which are arranged on the head of the probe housing and are electrically connected to the data transmission line.

[0017] Furthermore, the phased array ultrasonic probe is arranged away from the connector.

[0018] Furthermore, the connector is rotary.

[0019] Furthermore, the fiber hose is made of polyester fiber material.

[0020] Furthermore, the connection between the base and the third end and the connection between the first end and the liquid inlet are both provided with O-rings and filled with pressure-resistant fillers.

[0021] Furthermore, dust rings are provided at the connection between the base and the third end and at the connection between the first end and the liquid inlet.

[0022] The present invention also provides a method for monitoring the inner wall corrosion of a hydraulic cylinder, which uses the above-mentioned hydraulic cylinder inner wall corrosion monitoring probe, comprising the following steps:

[0023] The tension of the plurality of traction lines is adjusted by adjusting the electric winch unit, so that the fiber hose is bent and the probe assembly is driven to enter a preset monitoring position in the hydraulic cylinder;

[0024] Use ultrasonic positioning probe to confirm whether the preset monitoring position has been reached;

[0025] The hydraulic pressure in the hydraulic cylinder is monitored by a water pressure sensor, and the tension of the plurality of traction lines is adjusted according to the monitored hydraulic pressure;

[0026] The circumferential thickness of the inner wall of the hydraulic cylinder is detected by a phased array ultrasonic probe and the detected thickness data is transmitted to the controller in the base through a data transmission line. The controller uploads the thickness data to a computer terminal for recording and analysis.

[0027] The present invention discloses the following technical effects:

[0028] 1. It can detect the corrosion of the inner wall of the hydraulic cylinder in real time. The probe assembly, base, fiber hose and hydraulic cylinder are connected through a tee pipe. The probe assembly enters the hydraulic cylinder along the tee pipe. It can detect the corrosion of the inner wall of the hydraulic cylinder in real time when the hydraulic cylinder is working. There is no need to shut down the hydraulic cylinder for detection, which does not affect normal production. It can also serve as an early warning of hydraulic cylinder corrosion failure. Appropriate measures can be taken for maintenance before the corrosion of the hydraulic cylinder further develops, indirectly extending the service life of the hydraulic cylinder.

[0029] 2. This application has an excellent adaptability range. For different types and models of hydraulic cylinders, it is only necessary to change the size of the tee pipe and the base, and no other equipment structure needs to be adjusted.

[0030] 3. By adjusting the tension of the traction line inside the fiber hose, the bending direction and degree of the fiber hose are adjusted, so that the fiber hose can cope with the geometric changes of the inner wall of the hydraulic cylinder, improve the movement flexibility of the probe assembly and the accuracy of the moving position, so that the probe assembly can be accurately moved to the preset detection position to monitor the corrosion of the inner wall of the hydraulic cylinder.

[0031] 4. The connection between the base and the third end of the tee pipe, as well as the connection between the first end of the tee pipe and the hydraulic cylinder fluid inlet, are both equipped with dustproof rings, O-rings and filled with pressure-resistant fillers, which can greatly enhance the structural strength and pressure resistance of the connection, avoid leakage of hydraulic fluid when the hydraulic cylinder is working, and prevent external impurities and dust from entering the hydraulic system.

[0032] 5. The fiber cartilage is made of polyester fiber to ensure the strength and corrosion resistance of the fiber hose when used inside the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1: Installation diagram of the present invention in working state;

[0035] Figure 2: Structural diagram of the device of the present invention;

[0036] Figure 3: Internal structure of the fiber hose of the present invention;

[0037] Figure 4: A top view of the electric winch assembly installed in the base of the present invention;

[0038] Figure 5: Schematic diagram of the internal structure of the probe assembly;

[0039] Among them, 1. Base; 2. T-tube; 3. Fiber hose; 4. Connector; 5. Probe assembly; 6. Piston rod; 1.1. Electric winch unit; 1.2. DC brushless motor; 3.1. Data transmission line; 3.2. Traction line; 3.3. Ball hinge; 3.4. Traction hole; 5.1. Ultrasonic positioning probe; 5.2. Water pressure sensor; 5.3. Data transmission line; 5.4. Probe housing; 5.5. Phased array ultrasonic probe; 5.6. Sealing screw. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] 1 to 5, the present invention provides a hydraulic cylinder inner wall corrosion monitoring probe, the hydraulic cylinder is connected to the hydraulic fluid through the liquid inlet, including: a tee pipe 2, the first end of the tee pipe 2 is connected to the liquid inlet, and the second end is connected to the hydraulic fluid; a base 1, the base 1 is arranged at the third end of the tee pipe 2 and is connected to the third end, an electric hoist unit 1.1 and a controller are arranged in the base 1, the electric hoist unit 1.1 is driven by a DC brushless motor 1.2, and the controller is electrically connected to the DC brushless motor 1.2; a fiber hose 3, one end of the fiber hose 3 is connected to the base 1, and the other end extends from the second end into the base 1. Inside the hydraulic cylinder, a ball hinge 3.3 and multiple traction lines 3.2 are fixedly provided in the fiber hose 3. There are multiple ball hinges 3.3 and they are arranged along the length direction of the fiber hose 3. The ball hinge 3.3 passes through the front and rear surfaces to provide traction holes 3.4. The traction lines 3.2 pass through the multiple traction holes 3.4 in sequence, and one end thereof extends into the base 1 and is connected to the electric winch unit 1.1. The fixed end of the traction line 3.2 is set close to the other end of the fiber hose 3; the probe assembly 5 is fixedly provided at the other end of the fiber hose 3, and the probe assembly 5 is communicatively connected to the controller.

[0043] As shown in Figure 5, the probe assembly 5 includes: a probe housing 5.4, which is fixedly connected to the other end of the fiber hose 3 through a connector 4 and sealed at the end by a sealing screw 5.6; the connector 4 is of a rotary type. On the one hand, it can prevent the hydraulic fluid in the hydraulic cylinder from seeping into the interior of the probe housing 5.4, thereby improving the sealing performance; on the other hand, it can also connect and disconnect the probe housing 5.4 by rotation, facilitating subsequent maintenance and replacement of the probe assembly 5. There are multiple phased array ultrasonic probes 5.5 and they are circumferentially arranged in the probe housing 5.4. The phased array ultrasonic probes 5.5 are arranged away from the connector 4. Each phased array ultrasonic probe 5.5 can cover and monitor a portion of the inner wall of the hydraulic cylinder. The multiple phased array ultrasonic probes 5.5 distributed circumferentially can jointly monitor all positions of the inner wall of the hydraulic cylinder. At the same time, the phased array ultrasonic probes 5.5 are away from the connector 4, which can reduce the monitoring blind spot 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 passes through the hollow shaft in the middle of the multiple ball hinges 3.3 and is electrically connected to the controller. In this embodiment, the data transmission line 3.1 is located in the middle. Four traction lines 3.2 are arranged parallel to the length of the fiber hose 3 through the traction holes 3.4 in the ball hinges 3.3. Different tensions in the traction lines 3.2 can bend the fiber hose 3 in different directions. The traction probe assembly 5 is precisely controlled within the hydraulic cylinder to ensure that the phased array ultrasonic probe 5.5 reaches the preset detection position.

[0044] As shown in Figure 5, this embodiment also includes an ultrasonic positioning probe 5.1 and a water pressure sensor 5.2. These are located at the head of the probe assembly 5, where the opening is located, at a sealing screw 5.6, and are electrically connected to the data transmission line 3.1. Since the probe assembly 5 monitors the hydraulic cylinder while it is operating, the ultrasonic positioning probe 5.1 and water pressure sensor 5.2 are used to measure the hydraulic pressure at the detection location. The frequency, power, pulse width, and other parameters of the phased array ultrasonic probe 5.5 are then adjusted based on the measured hydraulic pressure. This ensures that the phased array ultrasonic probe 5.5 can transmit and receive signals in the hydraulic fluid, accurately detecting the inner wall thickness of the hydraulic cylinder and improving the effectiveness of hydraulic cylinder wall corrosion detection. Furthermore, the ultrasonic positioning probe 5.1 can also confirm the position of the hydraulic cylinder's piston rod 6, preventing collisions between the probe assembly 5 and the piston rod 6.

[0045] In this embodiment, the connection between the base 1 and the third end and the connection between the first end and the liquid inlet are both provided with O-rings and filled with pressure-resistant filler. The connection between the base 1 and the third end and the connection between the first end and the liquid inlet are both provided with dust rings.

[0046] The following describes a method for monitoring the inner wall corrosion of a hydraulic cylinder in combination with the above-mentioned hydraulic cylinder inner wall corrosion monitoring probe, which includes the following steps:

[0047] As shown in FIG1 , the controller controls the brushless DC motor 1.2 to adjust the electric winch unit 1.1 and thereby adjust the tension of the multiple traction lines 3.2, causing the fiber hose 3 to bend and drive the probe assembly 5 into the preset monitoring position in the hydraulic cylinder;

[0048] Use the ultrasonic positioning probe 5.1 to confirm whether the preset monitoring position has been reached;

[0049] The hydraulic pressure in the hydraulic cylinder is monitored by the water pressure sensor 5.2, and the tension of the multiple traction lines 3.2 is adjusted according to the monitored hydraulic pressure;

[0050] Phased array ultrasonic probe 5.5 measures the circumferential thickness of the inner wall of the hydraulic cylinder. The measured thickness data is transmitted via data transmission line 3.1 to a controller within base 1. The controller then uploads the thickness data to a computer terminal for recording and analysis. Specifically, image analysis software in the computer terminal, combined with the thickness data, can be used to generate an image of the inner wall of the hydraulic cylinder, enabling intuitive analysis and assessment of the corrosion condition of the inner wall.

[0051] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0052] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A corrosion monitoring probe for the inner wall of a hydraulic cylinder, where the hydraulic cylinder is connected to hydraulic fluid through a liquid inlet, and is characterized in that, Comprising: A tee pipe (2), the first end of the tee pipe (2) being in communication with the liquid inlet, and the second end being in communication with the hydraulic liquid; A base (1), the base (1) being disposed at the third end of the tee pipe (2) and in communication with the third end, an electric winch unit (1.1) and a controller being provided inside the base (1), the controller being electrically connected to the electric winch unit (1.1); A fiber hose (3), one end of the fiber hose (3) being in communication with the base (1), and the other end extending into the hydraulic cylinder from the second end. A ball hinge (3.3) and a plurality of traction lines (3.2) are fixedly provided inside the fiber hose (3). There are a plurality of ball hinges (3.3) arranged along the length direction of the fiber hose (3). The ball hinge (3.3) is provided with a traction hole (3.4) penetrating through the front and rear surfaces. The traction lines (3.2) sequentially pass through a plurality of traction holes (3.4), one end of which extends into the base (1) and is connected to the electric winch unit (1.1), and the fixed end of the traction line (3.2) is arranged near the other end of the fiber hose (3); A probe assembly (5), the probe assembly (5) being fixedly provided at the other end of the fiber hose (3), and the probe assembly (5) being in communication connection with the controller.

2. The corrosion monitoring probe for the inner wall of a hydraulic cylinder according to claim 1, characterized in that, The probe assembly (5) includes: A probe housing (5.4), the probe housing (5.4) being fixedly connected to the other end of the fiber hose (3) through a connector (4); A phased array ultrasonic probe (5.5), there being a plurality of phased array ultrasonic probes (5.5) arranged circumferentially inside the probe housing (5.4); 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 passing through the hollow shafts in the middle of a plurality of the ball hinges (3.3) and being electrically connected to the controller.

3. The corrosion monitoring probe for the inner wall of a hydraulic cylinder according to claim 2, characterized in that, 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 at the head of the probe housing (5.4) and being electrically connected to the data transmission line (3.1).

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

5. The corrosion monitoring probe for the inner wall of a hydraulic cylinder according to claim 2, characterized in that, The connector (4) is a rotary type.

6. A corrosion monitoring probe for the inner wall of a hydraulic cylinder according to claim 1, characterized in that, The fiber hose (3) is made of polyester fiber material.

7. A corrosion monitoring probe for the inner wall of a hydraulic cylinder according to claim 1, characterized in that, O-ring seals are provided at the connection between the base (1) and the third end and at the connection between the first end and the liquid inlet, and pressure-resistant packing is filled.

8. A corrosion monitoring probe for the inner wall of a hydraulic cylinder according to claim 7, characterized in that, Dust-proof rings are provided at the connection between the base (1) and the third end and at the connection between the first end and the liquid inlet.

9. A method for monitoring the corrosion of the inner wall of a hydraulic cylinder, characterized in that, Applying the hydraulic cylinder inner wall corrosion monitoring probe according to any one of claims 1-8, comprising the following steps: Adjusting the tension of the plurality of traction lines (3.2) by adjusting the electric winch unit (1.1) to bend the fiber hose (3) and drive the probe assembly (5) into a preset monitoring position inside the hydraulic cylinder; Confirming whether the preset monitoring position is reached through the ultrasonic positioning probe (5.1); Monitor the hydraulic pressure in the hydraulic cylinder through the hydraulic pressure sensor (5.2), and adjust the tension of multiple traction lines (3.2) according to the monitored hydraulic pressure; Detect the circumferential thickness of the inner wall of the hydraulic cylinder through the phased array ultrasonic probe (5.5), and transmit the detected thickness data to the controller in the base (1) through the data transmission line (3.1). The controller uploads the thickness data to the computer terminal for recording and analysis.

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