A liquid-gas separation oil cylinder strength detection device

Abstract

The application discloses a kind of liquid gas separation's oil cylinder strength detection device, including detection main body, and with the strength detection table of detection main body one side surface fixed connection, the inside of strength detection table upper half is opened with detection store, the inside of strength detection table lower half is opened with lower store, fixed frame and detection mechanism are fixedly installed in the detection store inner wall, conveying mechanism is fixedly installed in the strength detection table inner wall;The application, by setting detection mechanism, can intuitively obtain detection result, and can detect the phenomenon of slight internal leakage, so as to achieve accurate detection, convenient detection, by setting heating mechanism, the detection oil temperature can be heated, the accuracy of detection environment is ensured, so as to achieve the effect of accurate detection, by setting chute, the movement of sliding ring can be limited, to avoid the offset of sliding ring, in turn, lead to inaccurate detection value, so as to achieve the effect of accurate detection.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cylinder strength testing technology, and in particular to a hydraulic cylinder strength testing device with liquid-gas separation. Background Technology

[0002] The hydraulic cylinder strength testing device with liquid-gas separation is an intelligent industrial testing equipment specifically designed for hydraulic cylinders with liquid-gas separation, integrating functions such as pressure loading and internal leakage detection.

[0003] Since hydraulic cylinders generate heat during use and the operating environment also has a certain temperature, it is necessary to simulate the actual operating environment for testing to ensure the accuracy of the test. However, existing testing devices only test the strength of hydraulic cylinders under the testing environment and cannot test them under the actual operating environment of hydraulic cylinders, thus making the test results inaccurate.

[0004] Meanwhile, existing methods for internal leak detection include weighing, gas collection and flow rate, visual dyeing, and bubble detection. However, the weighing method cannot detect leaks from the gas chamber to the oil chamber, resulting in poor versatility and a long testing time. It is also ineffective at detecting minute leaks. The gas collection and flow rate method is inaccurate because gases easily dissolve in oil or form tiny bubbles, making complete separation and collection difficult. Furthermore, high-precision gas mass flow meters are expensive and require regular calibration, making them unsuitable for small and medium-sized enterprises or on-site testing scenarios. The visual dyeing method requires pre-mixing the dye with the oil and cleaning the oil cylinder and pipeline after testing, increasing the testing process and cost. The bubble detection method requires immersion testing and a separate water tank, increasing land costs and testing time.

[0005] Therefore, we provide a hydraulic cylinder strength testing device with liquid-gas separation. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned technical problems by providing a hydraulic cylinder strength testing device with liquid-gas separation, achieving accurate and convenient testing.

[0007] In view of this, the present invention provides a hydraulic cylinder strength testing device for liquid-gas separation, including a testing body and a strength testing platform fixedly connected to one side surface of the testing body. The upper half of the strength testing platform has a testing chamber inside, and the lower half of the strength testing platform has a lower chamber inside.

[0008] A fixed frame and a testing mechanism are fixedly installed on the inner wall of the testing chamber, a conveying mechanism is fixedly installed on the inner wall of the strength testing platform, and a heating mechanism is fixedly installed on one side of the conveying mechanism.

[0009] The fixed frame is provided with an oil cylinder, and the outer side of the oil cylinder is fixedly provided with an oil cavity hole and an air cavity hole.

[0010] Preferably, the detection mechanism comprises a scale board, both ends of which are fixedly provided with support tables, and a communication pipe is fixedly and penetratively arranged in the support table, a plurality of symmetrically distributed sliding grooves are formed in the outer side of the middle part of the communication pipe, and a sliding ring is arranged outside the communication pipe.

[0011] Preferably, the sliding ring is arranged outside the communication pipe, a pointer is fixedly arranged on one side of the sliding ring, a plurality of symmetrically distributed magnetic blocks are fixedly arranged in the sliding ring, and rolling balls are inlaid in the opposite sides of the magnetic blocks, the rolling balls are movably connected with the inner wall of the sliding groove, and one side of the magnetic block is slidably connected with the inner wall of the sliding groove.

[0012] Preferably, the two ends of the communication pipe are fixedly connected with one end of the oil cavity hole and the air cavity hole respectively, and the inner part of the communication pipe is in communication with the inner part of the oil cavity hole and the air cavity hole, and the middle part of the communication pipe is arranged on the upper side of the scale board.

[0013] Preferably, two symmetrically distributed sliding blocks are slidably connected with the inner wall of the communication pipe, support rods are fixedly connected with the opposite sides of the sliding blocks, and a magnetic cylinder is arranged outside the support rod.

[0014] Preferably, the detection mechanism is arranged on one side of the fixed frame, the oil cavity hole and the air cavity hole are two and symmetrically distributed.

[0015] Preferably, the conveying mechanism comprises a pump gas chamber and an oil chamber, a gas reciprocating loading device is fixedly arranged on the upper surface of the pump gas chamber, a gas conveying channel is fixedly arranged on the upper surface of the gas reciprocating loading device, a hydraulic oil reciprocating loading device is fixedly arranged on the upper surface of the oil chamber, and an oil conveying channel is fixedly arranged on the upper surface of the hydraulic oil reciprocating loading device.

[0016] Preferably, one end of the gas conveying channel and the oil conveying channel extends into the detection chamber, and one end of the gas conveying channel and the oil conveying channel is fixedly connected with the other end of the air cavity hole and the oil cavity hole respectively and in communication.

[0017] Preferably, the heating mechanism comprises a circulating pump, an oil conveying pipe is fixedly arranged on one end of the circulating pump, an oil extraction pipe is fixedly arranged on the end of the circulating pump away from the oil conveying pipe, the oil extraction pipe is two, and heating devices are fixedly connected with the opposite ends of the two oil extraction pipes.

[0018] Preferably, the end of the oil extraction pipe away from the heating device extends into the oil chamber, a temperature sensor is fixedly arranged on the inner wall of the oil chamber, and the end of the oil conveying pipe away from the circulating pump extends into the oil chamber.

[0019] Compared with the prior art, the oil cylinder strength detection device for liquid-gas separation has the following beneficial effects:

[0020] The present application can intuitively obtain the detection result, and can detect slight internal leakage, thereby achieving accurate and convenient detection.

[0021] The present application can heat the detection oil temperature, ensuring the accuracy of the detection environment, thereby achieving accurate detection.

[0022] The present application can limit the movement of the sliding ring to avoid the sliding ring from deviating, thereby ensuring the accuracy of the detection value, thereby achieving accurate detection.

[0023] The present application can reduce the friction between the sliding ring and the sliding groove, ensure the accurate and stable movement of the sliding ring and the pointer, and ensure the accuracy of the detection value, thereby achieving accurate detection.

[0024] The present application can monitor the temperature of the hydraulic oil in real time, thereby ensuring the accuracy of the detection environment and result, thereby achieving accurate detection.

[0025] The parts not involved in the device are the same as or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The present application provides an overall structure schematic diagram of the oil cylinder strength detection device for liquid-gas separation;

[0027] Figure 2 The present application provides a side view structure schematic diagram of the oil cylinder strength detection device for liquid-gas separation;

[0028] Figure 3 The present application provides a lower bin structure schematic diagram of the oil cylinder strength detection device for liquid-gas separation;

[0029] Figure 4 The present application provides a strength detection table cross-sectional structure schematic diagram of the oil cylinder strength detection device for liquid-gas separation;

[0030] Figure 5 The present application provides a conveying mechanism structure schematic diagram of the oil cylinder strength detection device for liquid-gas separation;

[0031] Figure 6 The present application provides a heating mechanism structure schematic diagram of the oil cylinder strength detection device for liquid-gas separation;

[0032] Figure 7 A fixed frame structure diagram of a liquid-gas separation oil cylinder strength detection device according to the present application;

[0033] Figure 8 A communication pipe structure diagram of a liquid-gas separation oil cylinder strength detection device according to the present application;

[0034] Figure 9 An enlarged diagram of structure A of a liquid-gas separation oil cylinder strength detection device according to the present application;

[0035] Figure 10 A sliding ring structure diagram of a liquid-gas separation oil cylinder strength detection device according to the present application;

[0036] Figure 11 A communication pipe cross-section structure diagram of a liquid-gas separation oil cylinder strength detection device according to the present application;

[0037] Figure 12 An enlarged diagram of structure B of a liquid-gas separation oil cylinder strength detection device according to the present application;

[0038] Figure 13 A sliding block cross-section structure diagram of a liquid-gas separation oil cylinder strength detection device according to the present application.

[0039] In the figure: 1, detection main body; 2, strength detection table; 3, detection bin; 4, lower bin; 5, warming mechanism; 51, temperature sensor; 52, oil delivery pipe; 53, circulating pump; 54, oil extraction pipe; 55, heating device; 6, delivery mechanism; 61, gas delivery bin; 62, gas reciprocating loading device; 63, gas delivery channel; 64, hydraulic oil reciprocating loading device; 65, oil delivery channel; 66, oil bin; 7, detection mechanism; 71, scale plate; 72, support table; 73, communication pipe; 74, sliding chute; 75, sliding ring; 76, pointer; 77, ball; 78, magnetic block; 79, sliding block; 710, magnetic cylinder; 711, support rod; 10, oil cylinder; 11, fixed frame; 12, oil cavity hole; 13, gas cavity hole. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0041] 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.

[0042] Example: A hydraulic cylinder strength testing device with liquid-gas separation, such as... Figures 1-13 As shown, the device includes a testing body 1 and a strength testing platform 2 fixedly connected to one side surface of the testing body 1. The upper half of the strength testing platform 2 has a testing chamber 3, and the lower half of the strength testing platform 2 has a lower chamber 4. A fixed frame 11 and a testing mechanism 7 are fixedly installed on the inner wall of the testing chamber 3. The fixed frame 11 is used to fix the oil cylinder 10. The testing mechanism 7 is located on one side of the fixed frame 11. The testing mechanism 7 includes a scale plate 71. The scale on the scale plate 71 corresponds to the offset of the pointer 76, so it can directly reflect the degree of leakage in the oil cylinder 10. The larger the offset, the more serious the leakage. Support platforms 72 are fixedly installed on both opposite ends of the scale plate 71. The support platforms 72 can provide a stable testing effect for the connecting pipe 73, ensuring a precise and stable connection between the two ends of the connecting pipe 73 and the oil cavity hole 12 and the air cavity hole 13, avoiding the connection pipe 73 from becoming loose under high pressure testing, which would lead to medium leakage and inaccurate testing.

[0043] A connecting pipe 73 is fixedly installed inside the support platform 72. The connecting pipe 73 is made of non-magnetic stainless steel to avoid affecting the movement of the magnetic block 78 and the magnetic cylinder 710. Two symmetrically distributed sliders 79 slide on the inner wall of the connecting pipe 73. Two sealing rings made of fluororubber are installed on the outer side of the sliders 79. The surface of the sealing rings is in close contact with the inner wall of the connecting pipe 73 to ensure that the medium in the two spaces centered on the sliders 79 will not leak during the movement of the sliders 79, thus ensuring the accuracy of the detection. Support rods 711 are fixedly connected to both sides of the sliders 79. During the testing process, the oil chamber and air chamber exert pressure on the two sliders 79. To prevent the magnetic cylinder 710 from being directly fixedly connected to the sliders 79 and thus causing damage to the magnetic cylinder 710, the magnetic cylinder 710 is sleeved on the outside of the support rod 711. The magnetic cylinder 710 and the magnetic block 78 are positioned opposite each other and have opposite magnetic poles. This ensures that when the magnetic cylinder 710 moves, the magnetic block 78 can move with the magnetic cylinder 710. The middle part of the connecting pipe 73 is set on the upper side of the scale plate 71. The two ends of the connecting pipe 73 are fixedly connected to one end of the oil chamber hole 12 and the air chamber hole 13, respectively. The inside of the connecting pipe 73 is connected to the inside of the oil chamber hole 12 and the air chamber hole 13.

[0044] A plurality of chute 74 are symmetrically arranged on the outer side of the middle part of the communication pipe 73, the chute 74 can provide the limiting effect for the movement of the magnetic block 78 and the ball 77, thereby ensuring the accurate moving direction of the sliding ring 75, avoiding the error of reading the scale value caused by the movement deviation of the sliding ring 75, the sliding ring 75 is arranged outside the chute 74, the sliding ring 75 is made of high-strength aluminum alloy material, thereby ensuring that the sliding ring 75 moves with the magnetic block 78 and the magnetic cylinder 710, the sliding ring 75 moves stably with the magnetic block 78 and the magnetic cylinder 710, the sliding ring 75 is arranged outside the communication pipe 73, the pointer 76 is fixedly installed on one side of the sliding ring 75, and the moving direction of the pointer 76 indicates which chamber leaks, thereby quickly determining which chamber has a problem, the pointer 76 is made of polytetrafluoroethylene material, a plurality of magnetic blocks 78 are symmetrically arranged inside the sliding ring 75, the plurality of symmetric magnetic blocks 78 can ensure the strong and effective magnetic attraction effect, and the symmetry can ensure the balance of force, thereby ensuring the accurate movement of the sliding ring 75;

[0045] The magnetic block 78 is embedded with the ball 77 on the opposite sides, the ball 77 can reduce the friction between the sliding ring 75 and the chute 74 during movement, thereby ensuring the accuracy of the detection result, the ball 77 is made of non-magnetic stainless steel material, which can avoid affecting the movement of the magnetic block 78 and the magnetic cylinder 710, the ball 77 is movably connected with the inner wall of the chute 74, one side of the magnetic block 78 is slidably connected with the inner wall of the chute 74, the inner wall of the strength detection table 2 is fixedly installed with the conveying mechanism 6, one side of the conveying mechanism 6 is fixedly installed with the warming mechanism 5, the warming mechanism 5 comprises a circulating pump 53, the circulating pump 53 is used for circulating heating of the hydraulic oil in the oil tank 66, thereby avoiding uneven heating and causing the detection environment to be substandard, one end of the circulating pump 53 is fixedly installed with the oil conveying pipe 52, the oil conveying pipe 52 extends to the inside of the oil tank 66 away from one end of the circulating pump 53, the oil conveying pipe 52 is fixedly installed with the oil pumping pipe 54 away from one end of the circulating pump 53, the oil pumping pipe 54 extends to the inside of the oil tank 66 away from one end of the heating device 55, the heating device 55 heats the hydraulic oil circulating thereto, thereby ensuring a good detection environment;

[0046] The two oil extraction pipes 54 are fixedly connected with the heating device 55 at opposite ends. The heating device 55 is a prior art and will not be described here. The conveying mechanism 6 includes a pump chamber 61 and an oil chamber 66. The inner wall of the oil chamber 66 is fixedly installed with a temperature sensor 51. The temperature sensor 51 is connected with a PLC control module. The PLC control module controls the start and stop of the circulating pump 53 and the heating device 55. The PLC control module is installed in the detection main body 1. The connection mode of the PLC control module with the temperature sensor 51, the circulating pump 53 and the heating device 55 is a prior art and will not be described here. The PLC control module is not shown in the figure. The upper surface of the pump chamber 61 is fixedly installed with a gas reciprocating loading device 62. The gas reciprocating loading device 62 cooperates with a hydraulic oil reciprocating loading device 64 to enable the oil cylinder 10 to reciprocate, thereby detecting the fatigue degree of the oil cylinder 10. The hydraulic oil reciprocating loading device 64 and the gas reciprocating loading device 62 are prior arts and will not be described here. After reciprocating for a period of time, the appearance of the oil cylinder 10 is checked to check whether the shell is deformed, whether there is obvious leakage at the sealing part, whether the weld is smooth, whether there are air holes, whether cracking or peeling occurs, and whether the connecting part is loose, etc. Then, the internal leakage test is performed to check the fatigue test condition of the oil cylinder 10 after the fatigue test. The upper surface of the gas reciprocating loading device 62 is fixedly installed with a gas conveying channel 63. The connection part between the gas conveying channel 63 and the gas cavity hole 13 is installed with an electromagnetic cut-off valve. When the inside of the oil cylinder 10 after the fatigue test is detected, the gas reciprocating loading device 62 and the hydraulic oil reciprocating loading device 64 pressurize the gas cavity and the oil cavity. When the pressure reaches the test value, the electromagnetic cut-off valve can be started by the PLC control module. The electromagnetic cut-off valve operates to close the gas cavity and the oil cavity, so that the gas cavity and the oil cavity can maintain the test pressure. The electromagnetic cut-off valve is a prior art and will not be described here. The hydraulic oil reciprocating loading device 64 is fixedly installed on the upper surface of the oil chamber 66.

[0047] The upper surface of the hydraulic oil reciprocating loading device 64 is fixedly installed with an oil conveying channel 65. The connection part between the oil conveying channel 65 and the oil cavity hole 12 is installed with an electromagnetic cut-off valve. One end of the gas conveying channel 63 and the oil conveying channel 65 extends into the detection chamber 3. One end of the gas conveying channel 63 and the oil conveying channel 65 is fixedly connected with and communicates with the other gas cavity hole 13 and the other oil cavity hole 12, respectively. The fixed frame 11 is provided with the oil cylinder 10. The oil cylinder 10 is fixedly installed with the oil cavity hole 12 and the gas cavity hole 13 on the outside. The oil cavity hole 12 and the gas cavity hole 13 are two and symmetrically distributed.

[0048] The existing detection device can only detect the oil cylinder 10 at room temperature or a fixed ambient temperature, cannot simulate the actual working temperature field of the oil cylinder 10, and thus causes deviation of the detection result, while the present application can accurately simulate the use temperature environment of the measured oil cylinder 10, so that the detection result is more in line with the real working condition, and the circulating heating mode can avoid the local overheating of the hydraulic oil, prevent the problem of deterioration of the oil caused by direct heating, and also does not need manual intervention for temperature adjustment, thereby improving the detection efficiency;

[0049] The existing weighing method can only detect that the oil cavity leaks into the gas cavity, and cannot detect that the gas cavity leaks into the oil cavity, while the present application can detect the leakage direction of the oil cavity leaking into the gas cavity and the gas cavity leaking into the oil cavity through the moving direction of the pointer 76, the universality is improved, and the existing weighing method has poor detection ability for small leakage and takes a long time, while the present application can accurately capture small leakage through the magnetic attraction synchronous transmission and the settings of the ball 77 reducing friction and the movement of the sliding block 79, and the detection process does not need long time pressure keeping, and the detection efficiency is improved;

[0050] The existing dyeing method needs to mix dyeing agents and needs to be cleaned after detection, and the gas collection method has low detection accuracy due to difficult gas separation, and relies on expensive high-precision flow meters, while the present application does not need to consume chemical reagents, does not need high-priced precision instruments, has simple structure and low maintenance cost, is suitable for small and medium-sized enterprises and on-site test scenes, and can directly determine the leaking cavity through the moving direction of the pointer 76, reducing the troubleshooting time.

[0051] Working principle: when the fatigue detection of the oil cylinder 10 is carried out, first, the oil cylinder 10 is placed on the fixed frame 11 and fixed, then one end of the gas channel 63 and the oil channel 65 is connected with the gas cavity hole 13 and the oil cavity hole 12 through the connecting pipe, then the hydraulic oil reciprocating loading device 64 and the gas reciprocating loading device 62 are started, through the cooperation of the hydraulic oil reciprocating loading device 64 and the gas reciprocating loading device 62, the oil cylinder 10 can be reciprocated, when the required detection time is reached, the operation of the hydraulic oil reciprocating loading device 64 and the gas reciprocating loading device 62 is stopped, then the oil cylinder 10 is inspected, then the internal inspection is carried out, at this time, the gas channel 63 and the oil channel 65 are not disconnected with the gas cavity hole 13 and the oil cavity hole 12, then the two ends of the communication pipe 73 are connected with another gas cavity hole 13 and another oil cavity hole 12 through another connecting pipe, at this time, the circulating pump 53 and the heating device 55 are started, the hydraulic oil is circulated through the oil suction pipe 54, the hydraulic oil enters the inside of the heating device 55, the heating device 55 heats the hydraulic oil, then the hydraulic oil enters the inside of the oil channel 52 through the circulating pump 53, and then returns to the oil storage 66, so as to complete the heating cycle, when the oil temperature is heated to the required detection temperature, the PLC control module controls the circulating pump 53 and the heating device 55 to stop running, at this time, the hydraulic oil reciprocating loading device 64 and the gas reciprocating loading device 62 are started, respectively, the gas and the hydraulic oil are transported into the oil cylinder 10, at the same time, the gas and the hydraulic oil enter the inside of the communication pipe 73, when the specified pressure is reached, the gas reciprocating loading device 62 and the hydraulic oil reciprocating loading device 64 are closed to stop the transportation of the gas and the hydraulic oil, at the same time, the electromagnetic cut-off valve is started to keep the detection pressure, at this time, when the internal leakage occurs, the sliding block 79 divides the communication pipe 73 into two independent spaces, at this time, the pressure of the two spaces is different, the sliding block 79 is extruded to the low pressure space by the high pressure space, when the sliding block 79 moves, the magnetic cylinder 710 moves, the magnetic cylinder 710 drives the magnetic block 78 to move, at this time, the sliding ring 75 starts to move on the sliding groove 74, at the same time, the ball 77 rolls on the inner wall of the sliding groove 74, and the pointer 76 moves with the sliding ring 75, when the set detection time is reached, the pointer 76 stops above the scale value on the scale plate 71, by reading the scale value, the specific situation of the internal leakage of the oil cylinder 10 can be known, when the detection is finished, the pointer 76 can be reset by manual mode.

[0052] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A liquid-gas separation oil cylinder strength detection device, comprising a detection main body (1) and a strength detection table (2) fixedly connected with one side surface of the detection main body (1), characterized in that, The upper half of the strength detection table (2) is internally provided with a detection bin (3), and the lower half of the strength detection table (2) is internally provided with a lower bin (4); The inner wall of the detection bin (3) is fixedly provided with a fixed frame (11) and a detection mechanism (7), the inner wall of the strength detection table (2) is fixedly provided with a conveying mechanism (6), and one side of the conveying mechanism (6) is fixedly provided with a heating mechanism (5); The fixed frame (11) is internally provided with an oil cylinder (10), and the outer side of the oil cylinder (10) is fixedly provided with an oil cavity hole (12) and an air cavity hole (13); The detection mechanism (7) comprises a scale plate (71), the opposite ends of the scale plate (71) are fixedly provided with support tables (72), the support tables (72) are fixedly and penetratively provided with communication pipes (73) inside, a plurality of symmetrically distributed sliding grooves (74) are formed in the middle outer side of the communication pipes (73), and sliding rings (75) are arranged outside the sliding grooves (74); a plurality of symmetrically distributed magnetic blocks (78) are fixedly arranged inside the sliding rings (75), the opposite sides of the magnetic blocks (78) are embedded with rolling balls (77), the rolling balls (77) are movably connected with the inner walls of the sliding grooves (74), and one side of the magnetic blocks (78) is slidably connected with the inner walls of the sliding grooves (74); The two ends of the communication pipes (73) are fixedly connected with one end of the oil cavity hole (12) and one end of the air cavity hole (13) respectively, and the inside of the communication pipes (73) is in communication with the inside of the oil cavity hole (12) and the air cavity hole (13); the middle part of the communication pipes (73) is arranged on the upper side of the scale plate (71), the inner walls of the communication pipes (73) slidably have two symmetrically distributed sliding blocks (79), the opposite sides of the sliding blocks (79) are fixedly connected with support rods (711) together, and the outer sides of the support rods (711) are sleeved with magnetic cylinders (710).

2. The device for detecting the strength of a hydro-pneumatic cylinder according to claim 1, wherein The sliding rings (75) are sleeved on the outer sides of the communication pipes (73), and one side of the sliding rings (75) is fixedly provided with a pointer (76).

3. The device for detecting the strength of a hydro-pneumatic cylinder according to claim 1, wherein The detection mechanism (7) is arranged on one side of the fixed frame (11), the oil cavity hole (12) and the air cavity hole (13) are two and symmetrically distributed.

4. The device for detecting the strength of a hydro-pneumatic cylinder according to claim 3, wherein The conveying mechanism (6) comprises a pump cavity (61) and an oil cavity (66), the upper surface of the pump cavity (61) is fixedly provided with a gas reciprocating loading device (62), the upper surface of the gas reciprocating loading device (62) is fixedly provided with a gas conveying channel (63), the upper surface of the oil cavity (66) is fixedly provided with a hydraulic oil reciprocating loading device (64), and the upper surface of the hydraulic oil reciprocating loading device (64) is fixedly provided with an oil conveying channel (65).

5. The device for detecting the strength of a hydro-pneumatic cylinder according to claim 4, wherein One end of the gas conveying channel (63) and the oil conveying channel (65) extends to the inside of the detection bin (3), and one end of the gas conveying channel (63) and the oil conveying channel (65) is fixedly connected with one end of the other air cavity hole (13) and the other oil cavity hole (12) respectively and in communication.

6. The device for detecting the strength of a hydro-pneumatic cylinder according to claim 5, wherein The heating mechanism (5) comprises a circulating pump (53), one end of the circulating pump (53) is fixedly installed with an oil delivery pipe (52), and the other end of the circulating pump (53) away from the oil delivery pipe (52) is fixedly installed with an oil suction pipe (54), the oil suction pipe (54) is two, and the two oil suction pipes (54) are commonly fixedly connected with a heating device (55) at opposite ends.

7. The device for detecting the strength of a hydro-pneumatic cylinder according to claim 6, wherein The oil suction pipe (54) extends to the inside of the oil tank (66) away from the heating device (55), a temperature sensor (51) is fixedly installed on the inner wall of the oil tank (66), and the oil delivery pipe (52) extends to the inside of the oil tank (66) away from the circulating pump (53).

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