A portable hydraulic cylinder inner leakage on-line detection device

Abstract

The utility model relates to the technical field of hydraulic equipment fault diagnosis and condition monitoring, concretely is a portable hydraulic cylinder inner leakage on -line detection device, the problem that the background art has proposed is solved, it includes main body valve block, the quick -coupling is installed on the main body valve block, the high pressure ball valve is installed on the quick -coupling, still install one visual flow indicator and one test switch valve on the main body valve block, when test switch valve is in test position, can first quick -coupling and second quick -coupling oil circuit intercommunication, and make it with visual flow indicator form a closed test loop for making leakage oil liquid flow, the utility model the device forms closed test loop through test switch valve and visual flow indicator, adopts mechanical type float flowmeter as indicating element, has the characteristics of no external power supply, display is direct and intuitive, and the overall structure is compact portable, connects through quick -coupling, and the operation is simple and safe, improves detection efficiency and reliability.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic equipment fault diagnosis and condition monitoring technology, specifically a portable online detection device for internal leakage of hydraulic cylinders. Background Technology

[0002] As the core actuator of a hydraulic system, the sealing performance of the hydraulic cylinder directly affects the system's working efficiency and reliability. Internal leakage in a hydraulic cylinder refers to the abnormal leakage of hydraulic oil from the high-pressure chamber to the low-pressure chamber due to wear or damage to the piston seal. This fault can cause problems such as slow equipment movement, lack of power, and decreased positioning accuracy, seriously affecting the normal operation of the equipment.

[0003] Currently, the detection of internal leaks in hydraulic cylinders mainly employs the following methods: First, offline detection, which requires complete disassembly of the hydraulic cylinder from the equipment and testing on a test bench. This method has a long testing cycle, a large workload, and affects the continuity of equipment operation. Second, online detection based on electronic sensors, which uses flow or pressure sensors in conjunction with a data processing unit to achieve detection. Although this method does not involve disassembly, it suffers from problems such as high equipment cost, the need for power supply, and poor environmental adaptability, making it inconvenient for widespread field use. Third, simple experience-based judgment, which involves roughly judging by observing the equipment's operating performance or touching the cylinder's temperature difference. This method has low reliability, cannot achieve quantitative detection, and is difficult to detect early faults.

[0004] Therefore, there is an urgent need for a device that is simple in structure, easy to operate, does not require an external power source, and can achieve rapid online detection to meet the needs of on-site maintenance personnel for rapid diagnosis of hydraulic cylinder internal leakage faults. Utility Model Content

[0005] To solve the above problems, this utility model provides the following technical solution: a portable online detection device for internal leakage of hydraulic cylinders, including a main valve block with an internally machined oil passage. A first quick connector and a second quick connector are respectively installed on both sides of the main valve block. A first high-pressure ball valve and a second high-pressure ball valve are respectively installed on the oil passage connecting the first quick connector and the second quick connector. A visual flow indicator is also installed on the main valve block, with its inlet and outlet connected to the oil passage inside the main valve block. A test switching valve is installed inside the main valve block. The test switching valve has at least one test position. When the test switching valve is in the test position, it can connect the oil passages of the first quick connector and the second quick connector, forming a closed test loop with the visual flow indicator for the leakage oil to flow through.

[0006] Preferably, the test switching valve is a three-position four-way manual directional valve, and its three working positions are as follows:

[0007] The first working position is used to connect the external pressure oil source with the first quick connector, and the second quick connector with the external return oil circuit.

[0008] The second working position is used to connect the external pressure oil source with the second quick connector, and the first quick connector with the external return oil circuit.

[0009] The third working position, also known as the test position, is used to simultaneously connect the first quick connector, the second quick connector, and the visual flow indicator.

[0010] Preferably, the visible flow indicator is a mechanical float flow meter with graduations marked on its transparent tube wall.

[0011] Preferably, the range of the mechanical float flowmeter is 0-50 mL / min.

[0012] Preferably, the main valve block is also equipped with a pressure gauge interface, which is connected to the oil circuit of the first quick connector and / or the second quick connector, and is used to install a pressure gauge to monitor the test pressure.

[0013] Preferably, a fine filter is also integrated on the main valve block, and the fine filter is connected in series in the inlet oil line of the visual flow indicator.

[0014] Preferably, the handles of the first and second high-pressure ball valves are in a conspicuous color to facilitate identification and operation.

[0015] Preferably, the device has a portable structure, with all components compactly integrated on the main valve block and equipped with a portable handle.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the device forms a closed test circuit by testing the switching valve and the visual flow indicator, realizing the non-disassembly online detection of leakage in the hydraulic cylinder. It uses a mechanical float flow meter as the indicating element, which has the characteristics of not requiring an external power supply and intuitive display. The overall structure is compact and portable. It is easy and safe to operate through quick connectors, thus improving the detection efficiency and reliability. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the hydraulic principle of this utility model.

[0020] In the diagram: 1. Main valve block; 2. First quick connector; 3. Second quick connector; 4. First high-pressure ball valve; 5. Second high-pressure ball valve; 6. Visual flow indicator; 7. Test switching valve; 8. Pressure gauge interface; 9. Fine filter; 10. Portable handle. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1 As shown, the portable online hydraulic cylinder leakage detection device of this embodiment includes a main valve block 1, which has an internal oil circuit. A first quick connector 2 and a second quick connector 3 are respectively installed on both sides of the main valve block 1. A first high-pressure ball valve 4 and a second high-pressure ball valve 5 are respectively installed on the oil circuit connecting the first quick connector 2 and the second quick connector 3. A visual flow indicator 6 is also installed on the main valve block 1. Its inlet and outlet are connected to the oil circuit inside the main valve block 1. A test switching valve 7 is installed inside the main valve block 1. The test switching valve 7 has at least one test position. When the test switching valve 7 is in the test position, it can connect the oil circuit of the first quick connector 2 and the second quick connector 3 and form a closed test circuit with the visual flow indicator 6 for the leakage oil to flow through.

[0023] Test switching valve 7 is a three-position four-way manual directional valve, and its three working positions are as follows:

[0024] The first working position is used to connect the external pressure oil source with the first quick connector 2, and the second quick connector 3 with the external return oil circuit.

[0025] The second working position is used to connect the external pressure oil source with the second quick connector 3, and the first quick connector 2 with the external return oil circuit.

[0026] The third working position, also known as the test position, is used to simultaneously connect the first quick connector 2, the second quick connector 3, and the visual flow indicator 6.

[0027] The visual flow indicator 6 is a mechanical float flow meter with graduations marked on its transparent tube wall.

[0028] The range of the mechanical float flowmeter is 0-50 mL / min.

[0029] The main valve block 1 is also equipped with a pressure gauge interface 8, which is connected to the oil circuit of the first quick connector 2 and / or the second quick connector 3, and is used to install a pressure gauge to monitor the test pressure.

[0030] The main valve block 1 also integrates a fine filter 9, which is connected in series in the inlet oil line of the visual flow indicator 6.

[0031] The handles of the first high-pressure ball valve 4 and the second high-pressure ball valve 5 are in a conspicuous color for easy identification and operation.

[0032] The device has a portable structure, with all components compactly integrated on the main valve block 1, and is equipped with a portable handle 10.

[0033] The working principle of this utility model is as follows: By switching to the test position through the test switching valve 7, the first quick connector 2 and the second quick connector 3 connecting the two chambers of the hydraulic cylinder form a closed test circuit with the visual flow indicator 6. When one chamber of the hydraulic cylinder is pressurized while the other chamber is under low pressure, if there is internal leakage, the leaking oil will flow in this closed circuit and drive the float in the visual flow indicator 6 to move. The internal leakage condition can be determined by observing the position of the float.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable online detection device for internal leakage in hydraulic cylinders, characterized in that, The system includes a main valve block (1) with an internal oil passage. A first quick connector (2) and a second quick connector (3) are installed on both sides of the main valve block (1). A first high-pressure ball valve (4) and a second high-pressure ball valve (5) are installed on the oil passages of the first quick connector (2) and the second quick connector (3). A visual flow indicator (6) is also installed on the main valve block (1). Its inlet and outlet are connected to the oil passage inside the main valve block (1). A test switching valve (7) is installed inside the main valve block (1). The test switching valve (7) has at least one test position. When the test switching valve (7) is in the test position, it can connect the oil passages of the first quick connector (2) and the second quick connector (3) and form a closed test loop with the visual flow indicator (6) for the leakage oil to flow through.

2. The portable online detection device for internal leakage of hydraulic cylinders according to claim 1, characterized in that: The test switching valve (7) is a three-position four-way manual directional valve, and its three working positions are as follows: The first working position is used to connect the external pressure oil source with the first quick connector (2) and the second quick connector (3) with the external return oil circuit; The second working position is used to connect the external pressure oil source with the second quick connector (3), and the first quick connector (2) with the external return oil circuit; The third working position, namely the test position, is used to simultaneously connect the first quick connector (2), the second quick connector (3), and the visual flow indicator (6).

3. The portable online detection device for internal leakage of hydraulic cylinders according to claim 1, characterized in that: The visible flow indicator (6) is a mechanical float flow meter with graduations marked on its transparent tube wall.

4. The portable online detection device for internal leakage of hydraulic cylinders according to claim 3, characterized in that: The mechanical float flowmeter has a flow rate of 0-50 mL / min.

5. The portable online detection device for internal leakage of hydraulic cylinders according to claim 1, characterized in that: The main valve block (1) is also equipped with a pressure gauge interface (8), which is connected to the oil circuit of the first quick connector (2) and / or the second quick connector (3).

6. The portable online detection device for internal leakage of hydraulic cylinders according to claim 1, characterized in that, The main valve block (1) is also equipped with a fine filter (9), which is connected in series in the inlet oil line of the visual flow indicator (6).

7. The portable online detection device for internal leakage of hydraulic cylinders according to claim 1, characterized in that, The handles of the first high-pressure ball valve (4) and the second high-pressure ball valve (5) are in a conspicuous color for easy identification and operation.

8. The portable online detection device for internal leakage of hydraulic cylinders according to claim 1, characterized in that, The device is a portable structure, with all components compactly integrated on the main valve block (1) and equipped with a portable handle (10).

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