Multi-parameter oil intelligent digital sensor test device

Abstract

The present application relates to the technical field of sensor, especially to a multi-parameter oil intelligent digital sensor testing device, comprising a mounting table, a rotating mechanism is arranged in the middle of the mounting table, a first lifting mechanism is vertically arranged on the rotating mechanism, and a sensor loading mechanism is connected below the first lifting mechanism; a cylinder with open upper and lower structures is arranged directly below the sensor loading mechanism, connected with a buffer mechanism through an opening of the mounting table, and an adjusting piston is arranged inside to form a sealed detection space with the sensor loading mechanism; a plurality of open-close conveying mechanisms are arranged circumferentially on the cylinder for inputting oil samples; a locking mechanism is arranged on the outer wall of the cylinder to lock the sensor loading mechanism; and a second lifting mechanism is arranged in the mounting table to drive the adjusting piston to move. The present application can simulate multi-parameter coupling conditions such as pressure, oil composition, vibration and temperature in the same detection space, realize efficient loading and accurate testing of the sensor, solve the problem of single parameter simulation of traditional devices, and meet the demand of high-performance testing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensors, in particular to a multi-parameter oil intelligent digital sensor test device. BACKGROUND

[0002] In the field of sensor technology, oil intelligent digital sensors are widely used in industrial equipment state monitoring, mechanical lubrication system management, aerospace hydraulic control and other fields, and their performance directly affects the reliability and safety of equipment operation. Such sensors need to accurately detect multiple parameters such as pressure, temperature, composition, and liquid level of oil under complex working conditions, so multi-condition simulation test is a key link to ensure that the performance of the sensor meets the standards.

[0003] Traditional test devices can usually only simulate a single parameter such as pressure or temperature, and it is difficult to simultaneously realize the simulation of multiple parameter coupling conditions such as pressure, oil composition, vibration, and temperature in the same detection space. It cannot truly restore the actual working environment of the sensor, resulting in deviations between test results and actual application scenarios.

[0004] To solve the above problems, there is an urgent need for a test device that can integrate multi-parameter simulation, efficiently load sensors, and accurately control the working conditions of the detection space to meet the high-performance testing needs of modern oil intelligent digital sensors. SUMMARY

[0005] The present application aims to solve the above-mentioned defects and provides a multi-parameter oil intelligent digital sensor test device.

[0006] In order to overcome the defects in the background art, the technical scheme adopted by the present application to solve its technical problems is as follows: a multi-parameter oil intelligent digital sensor test device, comprising a mounting table, a rotating mechanism is integrated in the middle of the mounting table, a first lifting mechanism is vertically installed on the rotating mechanism, and a sensor loading mechanism is connected below the first lifting mechanism;

[0007] A cylinder is vertically arranged directly below the sensor loading mechanism, both ends of the cylinder are open, the sensor loading mechanism loaded with sensors is inserted into the cylinder, the cylinder is connected to a buffer mechanism arranged on the top wall of the mounting table through an opening on the mounting table, and an adjusting piston is arranged inside the cylinder to move the adjusting piston, so that a closed detection space is formed between the adjusting piston and the sensor loading mechanism;

[0008] An opening and closing conveying mechanism is arranged circumferentially on the cylinder and configured in multiple numbers to input oil samples into the detection space between the adjusting piston and the sensor loading mechanism in the cylinder;

[0009] A locking mechanism is installed on the outer wall of the cylinder to lock the sensor loading mechanism inserted into the cylinder;

[0010] The mounting platform is equipped with a second lifting mechanism, which is connected to the adjusting piston and thus drives the adjusting piston to move up and down inside the cylinder.

[0011] Further improvements include the buffer mechanism comprising a vibration box and a surrounding plate radially arranged on the cylinder, the cylinder being inserted into the axially penetrating channel at the center of the vibration box, the surrounding plate being accommodated within the vibration box, and a guide post axially penetrating the surrounding plate being provided within the vibration box, and a vibration spring supporting the surrounding plate being sleeved on the guide post.

[0012] Further improvements include the opening and closing conveying mechanism comprising an opening and closing cylinder, the opening and closing cylinder being disposed on a protrusion formed on the outer surface of the cylinder, the protrusion forming an opening and closing inner cavity communicating with the inside of the cylinder, the connection between the opening and closing inner cavity and the inner cavity of the cylinder being provided with a hidden groove that fits with the opening and closing sealing part, and the opening and closing sealing part being connected to the output end of the opening and closing cylinder, and the protrusion forming an opening and closing connection part for connecting pipelines.

[0013] Further improvements include the rotating mechanism comprising a rotating platform and a column arranged vertically on the rotating platform, wherein a rotating arm for mounting the first lifting mechanism is radially arranged on the column.

[0014] Further improvements include the provision of multiple cylinders, which are distributed around the rotating mechanism.

[0015] Further improvements include the installation of a temperature sensor on the cylinder.

[0016] Further improvements include the sensor loading mechanism comprising an upper top plate, a lower bottom plate, and a connecting rib plate connecting the upper top plate and the lower bottom plate. The shape of the lower bottom plate matches the inner hole shape of the cylinder, thereby performing piston movement within the cylinder. A groove and matching stepped holes coaxially distributed with the groove are provided on the bottom surface of the lower bottom plate. A mounting ring plate for fixing the connection end of the sensor to the lower bottom plate is detachably installed in the groove.

[0017] Further improvements include the provision of a positioning support unit on the adjusting piston for positioning the mounting ring plate. The positioning support unit includes a positioning disc and a positioning support frame. The positioning disc is connected to the adjusting piston via the positioning support frame. The positioning disc has an axially formed positioning step hole for pre-loading the mounting ring plate and sensor.

[0018] Further improvements include an axially formed unlocking groove and a locking groove on the lower base plate, with the unlocking groove and the locking groove being misaligned and connected. The mounting ring plate is connected to at least two locking hooks, which hook onto the bottom surface of the unlocking groove after being inserted into the locking groove, thereby enabling the mounting ring plate to be detachably installed in the groove.

[0019] Further improvement, including the rotation mechanism is vertically connected with the unlocking guide rod, the unlocking guide rod through the opening of the guide hole after the top plate embedded in the unlocking slot to move the locking hook to remove the mounting ring plate.

[0020] The beneficial effects of the present application are: the design adjusts the closed detection space formed by the piston and the sensor loading mechanism, combines the second lifting mechanism, the buffer mechanism, the temperature sensor and the opening and closing conveying mechanism, can simulate multiple working condition coupling environments such as pressure, oil composition, vibration and temperature in the same space, and can restore the actual working scene of the sensor, solve the limitation of single parameter simulation of traditional devices, and improve the reliability of test results; the rotation mechanism is matched with multiple cylinder layouts, supports synchronous detection of multiple sensors, and significantly improves the test efficiency; the sensor loading mechanism adopts a quick mounting and dismounting structure of the locking hook and the unlocking guide rod, realizes convenient installation and dismounting of the sensor, and adapts to the test requirements of different models of sensors; the opening and closing conveying mechanism supports pre-prepared oil injection and on-site composition proportioning, combined with the volume control of the adjusting piston; the buffer mechanism accurately simulates vibration working conditions of different frequencies and amplitudes through the damping system of the vibration spring and the guide column, meets the performance test under complex working conditions; the temperature simulation supports adiabatic temperature rise / fall and external heating, covers wide temperature range test; inert protective gas can be injected into the detection space to ensure the safety of flammable oil test; during cleaning, high-frequency vibration of the adjusting piston is matched with vibration of the cylinder to realize efficient cleaning of the detection space, and the efficiency is improved by 40% compared with the traditional way. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present application will be further described below in conjunction with the drawings and examples.

[0022] Figure 1 is a top view of the present application;

[0023] Figure 2 is Figure 1 D-D section view in the present application;

[0024] Figure 3 is a cross-sectional view of the internal working process in the present application;

[0025] Figure 4 is Figure 3 A enlarged view in the present application;

[0026] Figure 5 is Figure 3 B enlarged view in the present application;

[0027] In the figure, 1 is the second lifting mechanism, 2 is the buffer mechanism, 3 is the temperature sensor, 4 is the first lifting mechanism, 5 is the rotation mechanism, 6 is the sensor loading mechanism, 7 is the locking mechanism, 8 is the opening and closing conveying mechanism, 9 is the mounting table, 10 is the adjusting piston, 11 is the positioning support unit, and 12 is the cylinder.

[0028] 201-vibration box, 202-enclosure, 203-guide column, 204-vibration spring;

[0029] 501-rotary platform, 502-rotating arm, 503-stand;

[0030] 601-unlocking guide rod, 602-engagement step hole, 603-connection rib plate, 604-upper top plate, 605-guide hole, 606-groove, 607-unlocking slot, 608-lower bottom plate, 609-locking slot, 610-locking hook part, 611-mounting ring plate;

[0031] 801-opening and closing cylinder, 802-opening and closing connecting part, 803-opening and closing inner cavity, 804-opening and closing sealing part, 805-concealing groove;

[0032] 1101-positioning support frame, 1102-positioning disc, 1103-positioning step hole. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by a person of ordinary skill in the art without creative labor based on the embodiments in the basic application belong to the protection scope of the present application.

[0034] Reference Figure 1 , Figure 2 and Figure 3 As shown in the drawings, a multi-parameter oil intelligent digital sensor test device includes a mounting table 9 as a basic support structure, a rotating mechanism 5 is integrated on the middle part thereof, which can realize 360-degree full-circumferential accurate rotation, a first lifting mechanism 4 is vertically installed on the rotating mechanism 5, and a sensor loading mechanism 6 is connected below the first lifting mechanism 4.

[0035] The cylinder body 12 is vertically arranged below the sensor loading mechanism 6, and the upper and lower ends of the cylinder body 12 are both open structures, so that the sensor loading mechanism 6 loaded with sensors can be inserted into the cylinder body 12, and the cylinder body 12 is connected with the buffer mechanism 2 arranged on the top wall of the mounting table 9 through the opening on the mounting table 9, so that the first lifting mechanism 4 drives the cylinder body 12 and the sensor loading mechanism 6 to move up and down synchronously, and the buffer mechanism 2 is used to simulate the external vibration environment, and by adjusting the frequency, amplitude and other parameters of the vibration, vibration conditions with different intensity and characteristics can be simulated to test the performance of the sensor in the vibration environment, and the adjusting piston 10 is arranged in the cylinder body 12 to move, so that a closed detection space is formed between the adjusting piston 10 and the sensor loading mechanism 6, and by adjusting the up and down movement of the adjusting piston 10, the volume of the detection space is changed, so that the pressure, oil state and other parameters in the detection space are adjusted;

[0036] The opening and closing conveying mechanism 8 is arranged in the circumferential direction of the cylinder body 12, and a plurality of opening and closing conveying mechanisms 8 are arranged to input oil samples with different proportions into the detection space between the adjusting piston 10 and the sensor loading mechanism 6 in the cylinder body 12 to test the sensor, and in addition, the base oil and additives can be input into the cylinder body 12 through different opening and closing conveying mechanisms 8 to directly perform on-site proportioning in the cylinder body 12, so as to reduce the time and improve the detection efficiency, and after the test is completed, the sample oil after the test can be discharged in time through the corresponding opening and closing conveying mechanism 8 through the adjusting piston 10, and when cleaning is needed, the cleaning agent can be added into the cylinder body 12 through the opening and closing conveying mechanism 8, and the adjusting piston 10 is used to move up and down to improve the cleaning effect, and then the opening and closing conveying mechanism 8 is opened to discharge the waste liquid in time after cleaning;

[0037] The locking mechanism 7 is mounted on the outer wall of the cylinder body 12 to lock the sensor loading mechanism 6 inserted into the cylinder body 12, so that the sensor loading mechanism 6 is kept at a specific position, and during the test, the stability of the sensor loading mechanism 6 is ensured to prevent the sensor position from deviating due to vibration, pressure change and other factors, so as to ensure the accuracy and reliability of the test results, and the locking mechanism 7 is preferably an electronic lock;

[0038] The mounting table 9 is provided with the second lifting mechanism 1, and the second lifting mechanism 1 is connected with the adjusting piston 10 to drive the adjusting piston 10 to move up and down in the cylinder body 12.

[0039] Specific embodiments, reference Figure 3The buffering mechanism 2 comprises a vibrating box 201 and a surrounding plate 202 radially arranged on the cylinder 12. The cylinder 12 is inserted into the central axial through channel of the vibrating box 201, and the surrounding plate 202 is accommodated in the vibrating box 201. The vibrating box 201 is provided with a guide column 203 axially penetrating the surrounding plate 202, and the guide column 203 is sleeved with a vibrating spring 204 supporting the surrounding plate 202. When the first lifting mechanism 4 drives the sensor loading mechanism 6 to be inserted into the cylinder 12, the locking mechanism 7 locks the sensor loading mechanism 6. Then, the first lifting mechanism 4 can directly drive the cylinder 12 to reciprocate up and down, thereby simulating the external vibration environment. The buffering mechanism 2 and the cylinder 12 play a role of flexible connection.

[0040] In specific embodiments, referring to Figure 5 The opening and closing conveying mechanism 8 comprises an opening and closing cylinder 801 arranged on a protruding portion formed on the outer surface of the cylinder 12. An opening and closing inner cavity 803 in communication with the inner portion of the cylinder 12 is formed in the protruding portion. A hidden groove 805 matched with an opening and closing blocking portion 804 is arranged at the connection position of the opening and closing inner cavity 803 and the inner cavity of the cylinder 12. The opening and closing blocking portion 804 is connected with the output end of the opening and closing cylinder 801. An opening and closing connecting portion 802 for connecting pipelines is formed on the protruding portion. When the opening and closing cylinder 801 drives the opening and closing blocking portion 804 to move, the opening and closing inner cavity 803 is in communication or closed with the inner space of the cylinder 12. This design has multiple functions such as conveying oil, waste liquid and air intake and exhaust. By reasonably setting the size and shape of the opening and closing inner cavity 803, the flow characteristics of the fluid can be optimized, and the conveying efficiency can be improved.

[0041] In specific embodiments, referring to Figure 2 The rotating mechanism 5 comprises a rotating platform 501 and a vertical column 503 vertically arranged on the rotating platform 501. A rotating arm 502 for mounting the first lifting mechanism 4 is radially arranged on the vertical column 503. The rotating platform 501 adopts high-precision bearings and driving motors to ensure the stability and accuracy of rotation. The length and angle of the rotating arm 502 can be designed and adjusted according to actual needs to adapt to sensors loading mechanisms 6 of different sizes and layouts.

[0042] In specific embodiments, a plurality of cylinders 12 are arranged. The cylinders 12 are distributed around the rotating mechanism 5. This design realizes synchronous detection of multiple sensors to improve detection efficiency.

[0043] In a specific embodiment, a temperature sensor 3 is provided on the cylinder 12. The temperature sensor 3 can detect the temperature of the sample oil inside the cylinder 12 in real time. The temperature sensor 3 transmits the detected temperature signal to the control system in real time. The control system can control the heating or cooling device according to the set temperature range to achieve precise adjustment of the oil temperature inside the cylinder 12 and simulate the performance of the sensor under different temperature conditions.

[0044] For specific embodiments, please refer to Figure 3 and Figure 4 The sensor loading mechanism 6 includes an upper top plate 604, a lower bottom plate 608, and a connecting rib plate 603 connecting the upper top plate 604 and the lower bottom plate 608. The shape of the lower bottom plate 608 matches the inner hole shape of the cylinder 12, thus performing piston movement within the cylinder 12. A groove 606 and a matching stepped hole 602 coaxially distributed with the groove 606 are provided on the bottom surface of the lower bottom plate 608. A mounting ring plate 611 for fixing the sensor connection end to the lower bottom plate 608 is detachably installed in the groove 606. While fixing the sensor with the mounting ring plate 611, the sensor's detection end is immersed in the sample oil in the detection space for detection.

[0045] In a further embodiment, the adjusting piston 10 may be provided with a positioning support unit 11 for positioning the loading and mounting ring plate 611, as shown in the reference. Figure 3 The positioning support unit 11 includes a positioning disk 1102 and a positioning support frame 1101. The positioning disk 1102 is connected to the adjusting piston 10 through the positioning support frame 1101. The positioning disk 1102 has a positioning step hole 1103 axially opened on it for pre-loading and installing the ring plate 611 and the sensor. When the adjusting piston 10 drives the positioning support unit 11 to move to the upper port of the cylinder 12, the positioning disk 1102 and the sensor are placed on the positioning disk 1102 in sequence by a robot. After completion, the sensor loading mechanism 6 moves down to dock with the positioning support unit 11, and then automatically installs the sensor on the sensor loading mechanism 6.

[0046] In a further embodiment, the lower base plate 608 is axially provided with an unlocking groove 607 and a locking groove 609, and the unlocking groove 607 and the locking groove 609 are connected in a staggered manner. The mounting ring plate 611 is connected with at least two locking hooks 610. When the locking hooks 610 are inserted into the locking groove 609, they hook onto the bottom surface of the unlocking groove 607, thereby realizing that the mounting ring plate 611 can be detachably set in the groove 606. This structural design realizes the rapid and reliable installation and removal of the sensor.

[0047] Further, the rotating mechanism 5 is vertically connected with an unlocking guide rod 601, the unlocking guide rod 601 is embedded in the unlocking slot 607 through the guide hole 605 opened on the upper top plate 604, and the unlocking guide rod 601 pushes the locking hook part 610 to move to disassemble the mounting ring plate 611, when the sensor loading mechanism 6 moves to the initial position, the unlocking guide rod 601 is completely inserted into the unlocking slot 607, and then pushes the locking hook part 610, and at the same time, the design of the unlocking guide rod 601 is beneficial to guide the sensor loading mechanism 6, and the design of the unlocking guide rod 601 makes the disassembly process of the sensor more convenient and efficient.

[0048] In specific embodiments, the first lifting mechanism 4 is preferably a pneumatic rod, which has the characteristics of convenient operation, fast response speed and compact structure, is provided with a quick exhaust valve (response time ≤10 ms) and a hydraulic buffer, and realizes high-frequency start-stop during vibration simulation. The second lifting mechanism 1 adopts a hydraulic oil cylinder, which has the advantages of large output force and stable operation, and is convenient for pressure regulation in the detection space. The second lifting mechanism 1 drives the adjusting piston 10 to move up and down, so as to compress and expand the detection space between the adjusting piston 10 and the sensor loading mechanism 6, thereby simulating different pressure conditions and testing the performance of the sensor under different pressure conditions.

[0049] Working principle: pressure simulation test, first, the first lifting mechanism 4 drives the sensor loading mechanism 6 to be vertically inserted into the cylinder body 12, when the sensor loading mechanism 6 reaches the predetermined position in the cylinder body 12, the locking mechanism 7 will immediately implement mechanical locking on it, to ensure that the detection end of the sensor is accurately positioned to the sealed detection space, when the opening and closing conveying mechanism 8 is opened, specific mixed oil is injected into the sealed detection space between the adjusting piston 10 and the sensor loading mechanism 6 through a high-precision proportioning system, so that the detection end of the sensor is completely immersed in the oil environment, then, the second lifting mechanism 1 drives the adjusting piston 10 to move upwards, and the stroke of the hydraulic oil cylinder is accurately controlled, so as to gradually compress the sealed detection space. Due to the accurate change of the volume of the detection space, the internal oil pressure linearly increases, in this process, the corresponding data of the sensor to different pressure values are collected in real time, and the measurement accuracy, hysteresis error and dynamic response characteristics of the sensor in the pressure range are comprehensively verified, to provide reliable calibration data for the oil pressure monitoring system.

[0050] Oil depth simulation experiment, the vertical position of the adjusting piston 10 is accurately controlled by the second lifting mechanism 1, so as to dynamically adjust the height size of the sealed detection space, when the adjusting piston 10 moves downwards, the height of the detection space increases, and the oil depth increases synchronously; on the contrary, the depth decreases. This depth adjustment method based on volume control can realize continuous adjustment of the oil depth, so that the detection end of the sensor can be accurately positioned in oil medium with different depths, to simulate the layered detection scene of the sensor in the vertical oil tank, gear box and other equipment in the actual working condition.

[0051] The oil component simulation experiment, the component ratio and the opening and closing conveying mechanism 8 of the different groups of the circulating system, can realize two working modes, the pre-preparation ratio mode: through the independent pipeline, the standard oil sample prepared in the laboratory is directly injected; The on-site ratio mode: the base oil pipeline (such as PAO synthetic base oil) and the additive pipeline (such as ZDDP anti-wear agent, T501 antioxidant) are synchronously conveyed, and the real-time mixing is realized in the closed detection space by adjusting the up-down reciprocating movement of the piston 10. After the test, the piston 10 goes up, and the waste liquid discharge pipeline of the opening and closing conveying mechanism 8 can realize more than 95% of the oil liquid emptying in 30 seconds. When cleaning, first inject a special cleaning agent (such as kerosene-based cleaning agent), and through the high-frequency vibration (50Hz reciprocating movement) of the adjusting piston 10 and the up-down vibration (amplitude ±5mm, frequency 10-50Hz adjustable) of the cylinder body 12 itself, the 360° dead angle flushing of the detection space is realized, and the cleaning efficiency is improved by 40% compared with the traditional static soaking.

[0052] Vibration simulation experiment, when the vibration working condition needs to be simulated, the first lifting mechanism 4 is switched to the vibration mode: the first lifting mechanism 4 carries out high-frequency start-stop movement, drives the cylinder body 12 and the internal oil to produce vibration of the same frequency, and the vibration spring 204 in the buffer mechanism 2 and the guide column 203 system form a damping vibration system, which can accurately simulate typical working conditions such as automobile engine vibration and industrial gear box vibration. The signal stability, anti-interference ability and other parameters of the sensor in the vibration environment can be collected and analyzed in real time through the matching measurement and control system.

[0053] Temperature simulation experiment, 10%-30% air volume is reserved in the detection space, the air is compressed by the second lifting mechanism 1, the gas adiabatic temperature rise principle (temperature rise rate can reach 10℃ / s) is used to quickly heat the oil, which is suitable for simulating the instantaneous temperature rise scene when the hydraulic system load suddenly increases. The opening and closing conveying mechanism 8 can be connected to a high-temperature hot gas pipeline (maximum temperature 200℃), or an electric heating sleeve can be integrated outside the cylinder body 12 to realize uniform heating of the oil. The adjusting piston 10 quickly goes down to expand the detection space, so that the internal air adiabatic expansion cools down (temperature drop rate can reach 8℃ / s), and can be combined with the vaporization of refrigerant gas to realize low-temperature environment simulation. The surface of the cylinder body 12 can be provided with a heat preservation layer to ensure the experimental effect.

[0054] When detecting flammable oil (flash point ≤60℃), nitrogen / carbon dioxide mixed protective gas (concentration ≥95%) is automatically injected through the gas pipeline to control the oxygen content in the detection space to be below 8%, which can eliminate the risk of combustion and explosion from the source.

[0055] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A multi-parameter oil intelligent digital sensor test device, characterized in that, It comprises a mounting table (9), a rotating mechanism (5) is integrated in the middle of the mounting table (9), a first lifting mechanism (4) is vertically installed on the rotating mechanism (5), and a sensor loading mechanism (6) is connected below the first lifting mechanism (4); A cylinder (12) is vertically arranged below the sensor loading mechanism (6), and the sensor loading mechanism (6) loaded with sensors is inserted into the cylinder (12), the cylinder (12) is connected with a buffer mechanism (2) arranged on the top wall in the mounting table (9) through an opening in the mounting table (9), an adjusting piston (10) for piston movement is arranged in the cylinder (12), and a closed detection space is formed between the adjusting piston (10) and the sensor loading mechanism (6). An opening and closing conveying mechanism (8) is arranged on the circumference of the cylinder (12) and is configured in multiple, which is used for inputting oil sample into the detection space between the adjusting piston (10) and the sensor loading mechanism (6) in the cylinder (12). A locking mechanism (7) is installed on the outer wall of the cylinder (12) and is used for locking the sensor loading mechanism (6) inserted into the cylinder (12). A second lifting mechanism (1) is arranged in the mounting table (9) and is connected with the adjusting piston (10) to drive the adjusting piston (10) to move up and down in the cylinder (12). The buffer mechanism (2) comprises a vibration box (201) and a surrounding plate (202) arranged radially on the cylinder (12), the cylinder (12) is inserted into the central axial through channel of the vibration box (201), the surrounding plate (202) is arranged in the vibration box (201), an axial guide column (203) is arranged in the vibration box (201) and penetrates the surrounding plate (202), and a vibration spring (204) is arranged on the guide column (203) and is used for supporting the surrounding plate (202).

2. A multi-parameter oil intelligent digital sensor testing device according to claim 1, characterized in that: The opening and closing conveying mechanism (8) comprises an opening and closing cylinder (801), the opening and closing cylinder (801) is arranged on a protruding part formed on the outer surface of the cylinder (12), an opening and closing inner cavity (803) is formed in the protruding part and is communicated with the inner cavity of the cylinder (12), a hidden groove (805) is arranged at the connection position between the opening and closing inner cavity (803) and the inner cavity of the cylinder (12) and is matched with an opening and closing sealing part (804), the opening and closing sealing part (804) is connected with the output end of the opening and closing cylinder (801), and an opening and closing connecting part (802) for connecting pipeline is formed on the protruding part.

3. A multi-parameter oil intelligent digital sensor testing device according to claim 1, characterized in that: The rotating mechanism (5) comprises a rotating platform (501) and a vertical column (503) vertically arranged on the rotating platform (501), and a rotating arm (502) for installing the first lifting mechanism (4) is arranged radially on the vertical column (503).

4. A multi-parameter oil intelligent digital sensor testing device according to claim 3, characterized in that: A plurality of cylinders (12) are arranged and are distributed around the rotating mechanism (5).

5. A multi-parameter oil intelligent digital sensor testing device according to claim 1, characterized in that: A temperature sensor (3) is arranged on the cylinder (12).

6. A multi-parameter oil intelligent digital sensor testing device according to claim 1, characterized in that: The sensor loading mechanism (6) comprises an upper top plate (604), a lower bottom plate (608), and a connecting rib plate (603) connecting the upper top plate (604) and the lower bottom plate (608), the lower bottom plate (608) is in mutual engagement with the inner hole shape of the cylinder (12) to make piston movement in the cylinder (12), a recess (606) and a matching step hole (602) coaxially distributed with the recess (606) are formed on the bottom surface of the lower bottom plate (608), and the recess (606) is detachably provided with a mounting ring plate (611) for fixing the connecting end of the sensor on the lower bottom plate (608).

7. A multi-parameter oil intelligent digital sensor test device according to claim 6, characterized in that: The adjusting piston (10) is provided with a positioning support unit (11) for positioning the loading mounting ring plate (611), the positioning support unit (11) comprises a positioning disc (1102) and a positioning support frame (1101), the positioning disc (1102) and the adjusting piston (10) are connected through the positioning support frame (1101), and the positioning disc (1102) is axially provided with a positioning step hole (1103) for preloading the mounting ring plate (611) and the sensor.

8. A multi-parameter oil intelligent digital sensor testing device according to claim 7, characterized in that: The lower bottom plate (608) is axially provided with an unlocking groove (607) and a locking groove (609), the unlocking groove (607) and the locking groove (609) are connected in a staggered manner, the mounting ring plate (611) is connected with at least two locking hook portions (610), when the locking hook portion (610) is inserted into the locking groove (609) and hooked on the bottom surface of the unlocking groove (607), the mounting ring plate (611) is detachably arranged in the recess (606).

9. A multi-parameter oil intelligent digital sensor testing device according to claim 8, characterized in that: The rotating mechanism (5) is vertically connected with an unlocking guide rod (601), the unlocking guide rod (601) is embedded in the unlocking groove (607) through the guide hole (605) formed on the upper top plate (604) to push the locking hook portion (610) to move to detach the mounting ring plate (611).

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