Double-seal leakage detection device of hydraulic oil cylinder

Abstract

The invention discloses a double-seal leakage detection device for a hydraulic oil cylinder, which comprises a detection main body and a test bin arranged in the upper half part of the detection main body, one side of the test bin is fixedly provided with an alignment mechanism, the lower side of the alignment mechanism is provided with a stabilizing mechanism, and the lower surface of the alignment mechanism is fixedly provided with a test mechanism. A control mechanism is fixedly mounted on one side of the detection main body, a conveying bin is formed in the lower half part of the detection main body, a conveying mechanism is arranged in the conveying bin, the testing mechanism comprises a communicating pipe, a pressure-bearing pipe is fixedly mounted on the outer side of the end part of the communicating pipe, and a spring is fixedly mounted in the pressure-bearing pipe; by arranging the testing mechanism, the sealing condition of two seals of the hydraulic oil cylinder can be visually judged through buzzing of the Hall sensor set and the buzzer set, whether leakage occurs in the sealing process in the detection medium input process or not can be accurately detected, and therefore the effects of accurate detection and high detection efficiency are achieved.

Description

Technical Field

[0001] This invention relates to the field of sealing leakage detection devices, and more particularly to a dual-seal leakage detection device for a hydraulic cylinder. Background Technology

[0002] The dual-seal leakage detection device for hydraulic cylinders is a specialized leakage detection equipment designed for the dual-seal system of hydraulic cylinders.

[0003] The key to the double seal of the hydraulic cylinder is double protection and leakage isolation. The device uses the isolation chamber formed between the two seals as the core of detection, and compares the medium state on one side of the two seals to realize the detection of seal leakage.

[0004] Existing testing methods can only determine which seal is leaking or both seals are leaking during the pressure holding process. However, in some hydraulic cylinder seals, leaks occur before the medium is injected. This is because the isolation chamber is filled with the medium during the injection process, and there will be no pressure relief during the subsequent pressure holding process. However, in reality, leaks have already occurred, leading to inaccurate test results.

[0005] Meanwhile, most existing testing devices place the hydraulic cylinder on the testing platform and then connect it to the medium delivery pipe for testing. This method is mostly used because existing devices do not have the ability to fix the hydraulic cylinder. However, this testing method can lead to the hydraulic cylinder vibrating during medium injection, requiring manual adjustment of its position, or the hydraulic cylinder moving, which can cause the hydraulic cylinder to fall and be damaged.

[0006] Therefore, we provide a dual-seal leakage detection device for hydraulic cylinders. Summary of the Invention

[0007] The purpose of this invention is to address the aforementioned technical problems by providing a dual-seal leakage detection device for hydraulic cylinders, achieving accurate detection, high detection efficiency, and stable detection.

[0008] In view of this, the present invention provides a double-seal leakage detection device for a hydraulic cylinder, including a detection body and a test chamber opened inside the upper half of the detection body. An alignment mechanism is fixedly installed on one side of the test chamber, a stabilizing mechanism is provided on the lower side of the alignment mechanism, and a test mechanism is fixedly installed on the lower surface of the alignment mechanism. A control mechanism is fixedly installed on one side of the detection body, and a conveying chamber is opened inside the lower half of the detection body, and a conveying mechanism is provided in the conveying chamber; The testing mechanism includes a connecting pipe, a pressure-bearing pipe is fixedly installed on the outer side of the end of the connecting pipe, a spring is fixedly installed inside the pressure-bearing pipe, a driving block is fixedly installed at the end of the spring away from the inner wall of the pressure-bearing pipe, and a push rod is fixedly installed at the end of the driving block away from the spring.

[0009] Preferably, the push rod has a spiral groove on its outer side, and a fixed plate and a connecting cylinder are sleeved on the outer side of the push rod. One side surface of the fixed plate is fixedly connected to one end of the connecting cylinder. There are two fixed plates, which are symmetrically distributed. The connecting cylinder has a rotor coil mounted on both opposite ends. A sliding block is fixedly installed inside the rotor coil, and the sliding block slides against the inner wall of the spiral groove.

[0010] Preferably, the upper half of the pressure-bearing pipe has a fixing groove on its inner wall, and two symmetrically distributed magnets are fixedly installed on the inner wall of the fixing groove. The rotor coil is disposed inside the magnets, and the periphery of the rotor coil is located inside the fixing groove.

[0011] Preferably, a connecting chamber is fixedly connected to one end of the connecting pipe, and a pressure gauge is fixedly installed in the connecting chamber on the side near the connecting pipe.

[0012] Preferably, a Hall sensor group is fixedly installed on one side of the connecting compartment, and a buzzer group is provided on one side of the Hall sensor group.

[0013] Preferably, the alignment mechanism includes a fixed plate and two symmetrically distributed sliders that are slidably connected to the outside of the fixed plate. A slide rail is fixedly installed on the side of the slider away from the fixed plate, and a traveling block is slidably connected to the outside of the slide rail. The lower surface of the traveling block is fixedly connected to the upper surface of the connecting chamber.

[0014] Preferably, the stabilizing mechanism includes two symmetrically distributed electric slide rails, two sets of movable bodies are fixedly installed on the two electric slide rails, a support body is fixedly installed on the upper surface of the movable body, and a clamp is fixedly installed on the upper end of the support body.

[0015] Preferably, there are two moving bodies in each group, and they are symmetrically distributed. There are two groups of clamps, two in each group, and they are symmetrically distributed. Hydraulic cylinders are attached to the opposite side surfaces of the clamps.

[0016] Preferably, the conveying mechanism includes a conveying pipe, the periphery of which is fixedly connected to the inner wall of the conveying chamber, one end of which extends to the outside of the detection body, and a medium chamber is provided on the outside of the detection body, and the conveying pipe is fixedly connected to the medium chamber.

[0017] Preferably, the end of the delivery pipe away from the medium chamber extends into the interior of the test chamber and is fixedly connected to one side of the connecting chamber. A protective pipe is sleeved on the outside of the delivery pipe, and a connecting pipe is fixedly installed on the lower surface of the connecting chamber. The protective pipe is fixedly installed inside the test chamber.

[0018] Compared with the prior art, the present invention provides a dual-seal leakage detection device for hydraulic cylinders, which has the following advantages: This invention, by setting up a testing mechanism, can intuitively determine the sealing condition of the two seals of the hydraulic cylinder through the buzzing of the Hall sensor group and the buzzer group, and can accurately detect whether the seal has leaked during the input of the test medium, thus achieving the effect of accurate detection and high detection efficiency.

[0019] This invention, by setting up an alignment mechanism, can quickly align hydraulic cylinder connection holes of different sizes, thereby ensuring connection stability and detection accuracy, thus achieving the effects of accurate detection, high detection efficiency and strong adaptability.

[0020] This invention, by setting up a stabilizing mechanism, can clamp the hydraulic cylinder being tested, ensuring the stability of the hydraulic cylinder during the testing process, thereby achieving high testing efficiency and stable testing results.

[0021] By setting up a conveying mechanism, this invention can deliver the detection medium into the hydraulic cylinder, providing a stable detection medium for detection, thereby achieving accurate and stable detection.

[0022] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This invention has a simple structure and is easy to operate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a dual-seal leakage detection device for a hydraulic cylinder proposed in this invention. Figure 2 This is a cross-sectional view of the detection body of a dual-seal leakage detection device for a hydraulic cylinder proposed in this invention. Figure 3 This is a schematic diagram of the test chamber structure of a dual-seal leakage detection device for a hydraulic cylinder proposed in this invention. Figure 4 This is a schematic diagram of the conveying chamber structure of a double-seal leakage detection device for a hydraulic cylinder proposed in this invention; Figure 5 This is a schematic diagram of the alignment mechanism of a dual-seal leakage detection device for a hydraulic cylinder proposed in this invention. Figure 6This is a schematic diagram of the conveying mechanism structure of a double-seal leakage detection device for a hydraulic cylinder proposed in this invention; Figure 7 This is a schematic diagram of the Hall sensor group structure of a dual-seal leakage detection device for a hydraulic cylinder proposed in this invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the pressure pipe of a double-seal leakage detection device for a hydraulic cylinder proposed in this invention. Figure 9 This is a schematic diagram of the magnet structure of a double-seal leakage detection device for a hydraulic cylinder proposed in this invention. Figure 10 This is an enlarged schematic diagram of section A of the dual-seal leakage detection device for a hydraulic cylinder proposed in this invention; Figure 11 This is a schematic diagram of the rotor coil structure of a double-seal leakage detection device for a hydraulic cylinder proposed in this invention. Figure 12 This is a schematic diagram of the rotor coil structure of a dual-seal leakage detection device for a hydraulic cylinder proposed in this invention.

[0024] In the diagram: 1. Detection body; 2. Control mechanism; 4. Test chamber; 5. Conveying chamber; 6. Alignment mechanism; 61. Fixing plate; 62. Slider; 63. Slide rail; 64. Traveling block; 7. Stabilizing mechanism; 71. Moving body; 72. Support body; 73. Electric slide rail; 74. Fixture; 8. Conveying mechanism; 81. Conveying pipe; 82. Protective pipe; 83. Connecting pipe; 84. Medium chamber; 9. Test mechanism; 901. Hall sensor group; 903. Buzzer group; 91. Connecting pipe; 92. Pressure bearing pipe; 93. Push rod; 94. Spiral groove; 95. Drive block; 96. Spring; 97. Fixing plate; 971. Connecting cylinder; 98. Magnet one; 99. Rotor coil; 991. Sliding block; 910. Fixing groove; 924. Connecting chamber; 925. Pressure gauge; 11. Hydraulic cylinder. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] Example: A dual-seal leakage detection device for a hydraulic cylinder, such as... Figures 1-12 As shown, the device includes a detection body 1 and a test chamber 4 located inside the upper part of the detection body 1. An alignment mechanism 6 is fixedly installed on one side of the test chamber 4. The alignment mechanism 6 includes a fixed plate 61 and two symmetrically distributed sliders 62 that are slidably connected to the outside of the fixed plate 61. A slide rail 63 is fixedly installed on the side of the sliders 62 away from the fixed plate 61. A traveling block 64 is slidably connected to the outside of the slide rail 63. The lower surface of the traveling block 64 is fixedly connected to the upper surface of the connecting chamber 924. A stabilizing mechanism 7 is provided on the lower side of the alignment mechanism 6. The stabilizing mechanism 7 includes two symmetrically distributed electric slide rails 73. Two sets of moving bodies 71 are fixedly installed on the two electric slide rails 73. There are two moving bodies 71 in each set, and they are symmetrically distributed. A support body 72 is fixedly installed on the upper surface of the movable body 71. Several supports 72 can bear the weight of the hydraulic cylinder 11. A clamp 74 is fixedly installed on the upper end of the support body 72. The clamp 74 is made of polyurethane rubber, which can ensure that the hydraulic cylinder 11 will not be scratched when clamping it, thus protecting the hydraulic cylinder 11. There are two sets of clamps 74, two in each set, which are symmetrically distributed. The hydraulic cylinder 11 is attached to the opposite sides of the clamp 74. A test mechanism 9 is fixedly installed on the lower surface of the alignment mechanism 6. A control mechanism 2 is fixedly installed on one side of the detection body 1. The current of the non-leaking hydraulic cylinder 11 when it is pressurized under the same medium pressure is pre-input into the microcontroller inside the control mechanism 2. The microcontroller reads the current data collected by the Hall sensor group 901 at a fixed sampling frequency and compares it with the current curve when the hydraulic cylinder 11 is tested. When the deviation exceeds the deviation threshold, the buzzer group 903 can sound an alarm in real time, and the control mechanism 2 will display a comparison graph of the two current curves. This makes it easier for the tester to observe and judge when and under what pressure the leakage occurs, so as to make corresponding rectifications. The microcontroller and the connection between the microcontroller and the control mechanism 2, the Hall sensor group 901, and the buzzer group 903 are existing technologies and will not be described in detail here. They are not shown in the figure. The control mechanism 2 is also existing technology and will not be described in detail here. The lower half of the detection body 1 has a conveying chamber 5. The conveying chamber 5 is equipped with a conveying mechanism 8. The conveying mechanism 8 includes a conveying pipe 81. The length of the conveying pipe 81 inside the conveying chamber 5 is sufficient to allow the conveying pipe 81 located inside the test chamber 4 to move, thereby ensuring the operation of the alignment mechanism 6. The end of the conveying pipe 81 away from the medium chamber 84 extends into the test chamber 4 and is fixedly connected to one side of the connecting chamber 924. A protective pipe 82 is sleeved on the outside of the conveying pipe 81. The protective pipe 82 is made of polyoxymethylene tube material, which can reduce friction on the conveying pipe 81. The protective pipe 82 is fixedly installed inside the test chamber 4. The protective pipe 82 can support and protect the conveying pipe 81. The periphery of the conveying pipe 81 is fixedly connected to the inner wall of the conveying chamber 5. One end of the conveying pipe 81 extends to the outside of the detection body 1. The outer side of the detection body 1 is provided with a medium chamber 84. The delivery pipe 81 is fixedly connected to the medium chamber 84. An electric shut-off valve is installed between the delivery pipe 81 and the medium chamber 84. When pressure is maintained, the control mechanism 2 activates the electric shut-off valve to block the delivery pipe 81, thereby ensuring the stability and accuracy of pressure maintenance. The electric shut-off valve is existing technology and will not be described in detail here, nor is it shown in the figure. The medium chamber 84 can provide the detection medium and perform high-pressure delivery. The testing mechanism 9 includes a connecting pipe 91. One end of the connecting pipe 91 is fixedly connected to a connecting chamber 924. A connecting pipe 83 is fixedly installed on the lower surface of the connecting chamber 924. A Hall sensor group 901 is fixedly installed on one side of the connecting chamber 924. The Hall sensor group 901 consists of two Hall sensors, which are used to detect the current during the pressurization process and the pressure maintenance process, respectively. The Hall sensor group 901 can convert the current change into a processable electrical signal. The Hall sensor group 901 and the connection method between the Hall sensor group 901 and the rotor coil 99 are existing technologies and will not be described in detail here. A buzzer group 903 is provided on one side of the Hall sensor group 901. The buzzer group 903 consists of two buzzers, which are used to detect the current during the pressurization process and the pressure holding process, respectively. When the pressure holding process is underway, if there is no leakage, the rotor coil 99 will not rotate, and no current will be generated. The buzzer group 903 cannot sound an alarm. When leakage occurs, the drive block 95 moves, the rotor coil 99 rotates and generates current, and the buzzer group 903 starts to sound. This indicates that there is an internal leakage in the hydraulic cylinder 11 during the pressure holding stage. The buzzer group 903 requires an NPN transistor for auxiliary drive to compensate for the fact that the output current of the Hall sensor group 901 is insufficient to drive the buzzer group 903. The NPN transistor is existing technology and will not be described in detail here. The buzzer group 903 is fixedly connected to the surface of the connecting compartment 924. A pressure gauge 925 is fixedly installed on the side of the connecting chamber 924 near the connecting pipe 91. A pressure-bearing pipe 92 is fixedly installed on the outer side of the end of the connecting pipe 91. A fixing groove 910 is opened on the inner wall of the upper half of the pressure-bearing pipe 92. Two magnets 98 are fixedly installed on the inner wall of the fixing groove 910. A spring 96 is fixedly installed inside the pressure-bearing pipe 92. A drive block 95 is fixedly installed on the end of the spring 96 away from the inner wall of the pressure-bearing pipe 92. A push rod 93 is fixedly installed on the end of the drive block 95 away from the spring 96. The length of the push rod 93 and the pressure-bearing pipe 92 is adapted to the capacity of the hydraulic cylinder 11, thereby ensuring the moving length of the push rod 93. A spiral groove 94 is provided on the outer side of the push rod 93. A fixed plate 97 and a connecting cylinder 971 are sleeved on the outer side of the push rod 93. One side surface of the fixed plate 97 is fixedly connected to one end of the connecting cylinder 971. There are two fixed plates 97, which are symmetrically distributed. The rotor coil 99 is rotatably mounted on both ends of the connecting cylinder 971. The rotor coil 99 is located inside the magnet 98, and the periphery of the rotor coil 99 is located inside the fixed groove 910. A sliding block 991 is fixedly installed inside the rotor coil 99. The sliding block 991 slides in contact with the inner wall of the spiral groove 94. Current can be generated by the rotation of the rotor coil 99 and the cooperation of the magnet 98. The magnitude of the current corresponds to the speed of the rotor coil 99. The way in which the rotor coil 99 and the magnet 98 generate current is existing technology and will not be described in detail here.

[0028] Working principle: When testing the hydraulic cylinder 11, the current change curve and deviation threshold of the hydraulic cylinder 11 under the same medium pressure for non-leaking hydraulic cylinder 11 are first input into the control mechanism 2. Then, the electric slide rail 73 is run by the control mechanism 2. At this time, the moving body 71 starts to move, and the support body 72 moves with the moving body 71. The support body 72 drives the surface of the clamp 74 to fit tightly with the outer surface of the hydraulic cylinder 11, thereby completing the fixation of the hydraulic cylinder 11. At this time, the slider 62 can slide on the fixed plate 61 to adjust its position by the control mechanism 2. After the position of the fixed plate 61 is adjusted, the position of the traveling block 64 is adjusted. The movement of the traveling block 64 on the slide rail 63 can also drive the connecting chamber 924 to move. At this time, the connecting pipe 83 can be aligned with the chamber connecting hole on the hydraulic cylinder 11. Then, the connecting pipe 83 is manually connected and fixed with the two chamber connecting holes on the hydraulic cylinder 11. At this time, the medium chamber 84 is operated by the control mechanism 2. The medium chamber 84 can inject the test medium into the hydraulic cylinder 11 through the connecting pipe 83. First, the test medium enters the connecting chamber 924 through the delivery pipe 81, and then enters the hydraulic cylinder 11 through the connecting pipe 83 after passing through the connecting chamber 924. At the same time, the pressure gauge 925 displays the current pressure inside the hydraulic cylinder 11. Meanwhile, the medium enters the connecting pipe 91 and pushes the drive block 95. At this time, the drive block 95 moves upward and pushes the push rod 93 upward. At this time, the spiral groove 94 can make the sliding block 991 slide along its own surface and generate a thrust on the sliding block 991. At this time, the sliding block 991 rotates, and the rotor coil 99 rotates with the sliding block 991. The rotor coil 99 and the magnet 98 can generate current. When one of the seals leaks, the detection medium will first enter the isolation chamber between the two seals. At this time, the pressure rise rate of the chamber near the leaking seal is slower, and the rotation speed of the rotor coil 99 is also slower. The moving speed of the drive block 95 and the moving speed of the push rod 93 will be lower. At this time, the current is lower than the normal charging current value. Therefore, through comparison and judgment by the microcontroller inside the control mechanism 2, the abnormal current is detected, which triggers the buzzer group 903 to warn and displays the comparison details. This allows the system to determine if internal leakage has already occurred during the pressurization process. If no leakage occurs during the initial pressurization and the current curve does not show any abnormalities compared to the control current curve, the buzzer group 903 will not issue a warning. However, if leakage occurs during the middle or later stages of pressurization, the leakage will reduce the movement speed of the drive block 95, causing the current to fluctuate. The microcontroller inside the control mechanism 2 will then detect the current abnormality through comparison and trigger the buzzer group 903 to issue a warning and display the comparison details. Therefore, the control mechanism 2 can continuously compare and issue warnings throughout the entire pressurization process, thus ensuring the detection of internal leakage throughout the entire pressurization process. If no leakage occurs during the test, the buzzer group 903 will not sound an alarm throughout the test. Then, a pressure holding test should be performed. The medium chamber 84 is stopped from injecting medium by the control mechanism 2, and then pressure holding is performed. If internal leakage occurs during the pressure holding process, the rotor coil 99 will rotate and generate current. The Hall sensor group 901 can detect the current and drive the buzzer group 903 to sound through the NPN transistor, thereby determining whether there is a leak in the hydraulic cylinder 11 during the pressure holding stage. If no leakage occurs, the buzzer group 903 will not sound and the test will end.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A double-seal leakage detection device for a hydraulic cylinder, comprising a detection body (1) and a test chamber (4) formed inside the upper half of the detection body (1), characterized in that, An alignment mechanism (6) is fixedly installed on one side of the test chamber (4), a stabilizing mechanism (7) is provided on the lower side of the alignment mechanism (6), and a test mechanism (9) is fixedly installed on the lower surface of the alignment mechanism (6). A control mechanism (2) is fixedly installed on one side of the detection body (1), and a conveying chamber (5) is opened inside the lower half of the detection body (1), and a conveying mechanism (8) is provided in the conveying chamber (5). The testing mechanism (9) includes a connecting pipe (91), a pressure-bearing pipe (92) is fixedly installed on the outer side of the end of the connecting pipe (91), a spring (96) is fixedly installed inside the pressure-bearing pipe (92), a driving block (95) is fixedly installed at the end of the spring (96) away from the inner wall of the pressure-bearing pipe (92), and a push rod (93) is fixedly installed at the end of the driving block (95) away from the spring (96).

2. The dual-seal leakage detection device for a hydraulic cylinder according to claim 1, characterized in that, The push rod (93) has a spiral groove (94) on its outer side. A fixed plate (97) and a connecting cylinder (971) are sleeved on the outer side of the push rod (93). One side surface of the fixed plate (97) is fixedly connected to one end of the connecting cylinder (971). There are two fixed plates (97) and they are symmetrically distributed. The connecting cylinder (971) has a rotor coil (99) installed on both ends of the connecting cylinder (971). A sliding block (991) is fixedly installed inside the rotor coil (99). The sliding block (991) slides against the inner wall of the spiral groove (94).

3. The dual-seal leakage detection device for a hydraulic cylinder according to claim 2, characterized in that, The upper half of the pressure pipe (92) has a fixed groove (910) on its inner wall. Two magnets (98) are fixedly installed on the inner wall of the fixed groove (910). The rotor coil (99) is located inside the magnet (98), and the periphery of the rotor coil (99) is located inside the fixed groove (910).

4. The dual-seal leakage detection device for a hydraulic cylinder according to claim 1, characterized in that, One end of the connecting pipe (91) is fixedly connected to a connecting chamber (924), and a pressure gauge (925) is fixedly installed on the side of the connecting chamber (924) near the connecting pipe (91).

5. A double-seal leakage detection device for a hydraulic cylinder according to claim 4, characterized in that, A Hall sensor group (901) is fixedly installed on one side of the connecting compartment (924), and a buzzer group (903) is provided on one side of the Hall sensor group (901).

6. The dual-seal leakage detection device for a hydraulic cylinder according to claim 5, characterized in that, The alignment mechanism (6) includes a fixed plate (61) and two symmetrically distributed sliders (62) that are slidably connected to the outside of the fixed plate (61). A slide rail (63) is fixedly installed on the side of the slider (62) away from the fixed plate (61). A traveling block (64) is slidably connected to the outside of the slide rail (63). The lower surface of the traveling block (64) is fixedly connected to the upper surface of the connecting chamber (924).

7. The dual-seal leakage detection device for a hydraulic cylinder according to claim 1, characterized in that, The stabilizing mechanism (7) includes two symmetrically distributed electric slide rails (73), and two sets of moving bodies (71) are fixedly installed on the two electric slide rails (73). A support body (72) is fixedly installed on the upper surface of the moving body (71), and a clamp (74) is fixedly installed on the upper end of the support body (72).

8. A double-seal leakage detection device for a hydraulic cylinder according to claim 7, characterized in that, The moving bodies (71) are in groups of two and are symmetrically distributed. The clamps (74) are in two groups of two and are symmetrically distributed. The clamps (74) have hydraulic cylinders (11) attached to their opposite sides.

9. A double-seal leakage detection device for a hydraulic cylinder according to claim 5, characterized in that, The conveying mechanism (8) includes a conveying pipe (81), which is fixedly connected to the inner wall of the conveying chamber (5) on its periphery. One end of the conveying pipe (81) extends to the outside of the detection body (1). A medium chamber (84) is provided on the outside of the detection body (1). The conveying pipe (81) is fixedly connected to the medium chamber (84).

10. A double-seal leakage detection device for a hydraulic cylinder according to claim 9, characterized in that, The delivery pipe (81) extends from the end away from the medium chamber (84) into the interior of the test chamber (4) and is fixedly connected to one side of the connecting chamber (924). A protective pipe (82) is sleeved on the outside of the delivery pipe (81). A connecting pipe (83) is fixedly installed on the lower surface of the connecting chamber (924). The protective pipe (82) is fixedly installed inside the test chamber (4).

Images