Lifting positioning device for water and oil leakage detection

Abstract

The invention relates to the technical field of air tightness detection equipment, and discloses a lifting positioning device for water and oil leakage detection, which comprises a protective base and a protective outer shell, the protective base is fixed on the ground through bolts, the protective outer shell is arranged at the upper end of the protective base, and moving devices are arranged at the rear ends of the inner walls of the two sides of the protective outer shell. The tops of the inner walls of the two sides of the protective outer shell are fixedly connected with two symmetrically-arranged first sliding rods, the first sliding rods are provided with fluid counter-acting force counteracting devices, the front side of the moving device is provided with a mounting plate, the mounting plate is provided with a lifting device, and the lower end of the lifting device is provided with a detection device fixing plate. The bottom of the detection device fixing plate is provided with a water-oil sealing detection device for detecting an engine cylinder body, an inner cavity of the protection base is provided with a control system, and the device enables compensation force to be stable and offset in multiple directions through a fluid reaction force offset device, avoids displacement, reduces manual calibration, saves cost, and improves production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of airtightness detection equipment, and specifically to a lifting and positioning device for water and oil leak detection. Background Art

[0002] In the production line of extended-range engine cylinder blocks, water and oil leak detection is a key link to ensure the product's sealing performance and quality reliability. Currently, the industry generally uses the flow detection method to test the leakage of cylinder blocks, and judges the sealing performance by monitoring the flow rate change of the fluid during the liquid filling or leakage process. However, the existing lifting and positioning devices for water and oil leak detection have obvious defects in dealing with the fluid reaction force.

[0003] During the flow detection process, the reaction force generated by the high-speed flowing water or oil on the cylinder block interface is very likely to interfere with the precise positioning of the cylinder block. If the clamping mechanism of the lifting and positioning device has insufficient stiffness, the cylinder block will have a small displacement under the reaction force, which will further cause the sealing tooling to disengage or misalign with the cylinder block interface. This will not only result in distorted detection results, such as "false leakage" or "false pass" phenomena, seriously affecting the product quality judgment; but also the accumulated displacement deviation over time will exacerbate the uneven wear of the guiding mechanism of the positioning device, leading to a significant decrease in the repeat positioning accuracy, making it difficult to obtain accurate and reliable data in subsequent detections. In addition, to correct the detection errors caused by the positioning deviation, the production line needs to frequently perform manual calibration and equipment debugging, which greatly reduces the production efficiency and increases the operating cost. Therefore, it is urgent to develop a lifting and positioning device for water and oil leak detection that can effectively resist the interference of the fluid reaction force and ensure the precise positioning of the cylinder block to meet the requirements of high-efficiency and high-precision production and detection of extended-range engine cylinder blocks. For this reason, we have proposed a lifting and positioning device for water and oil leak detection. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a lifting and positioning device for water and oil leak detection, which solves the above problems.

[0006] (II) Technical Solutions

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: A lifting and positioning device for water and oil leak detection, comprising a protective base and a protective outer casing. The protective base is fixed to the ground by bolts. The upper end of the protective base is provided with a protective outer casing. A moving device is provided at the rear ends of the inner walls on both sides of the protective outer casing. Two symmetrically arranged first sliding rods are fixedly connected to the tops of the inner walls on both sides of the protective outer casing. A fluid reaction force cancellation device is arranged on the first sliding rods. An installation plate is arranged on the front side of the moving device. A lifting device is arranged on the installation plate. A detection device fixing plate is arranged at the lower end of the lifting device. A water and oil tightness detection device for detecting the engine cylinder block is arranged at the bottom of the detection device fixing plate. A control system is arranged in the inner cavity of the protective base.

[0008] Preferably, the moving device includes a metal protective casing, a translation drive motor, a first slide rail, a threaded drive rod, and a horizontal moving seat. Metal protective casings are fixedly connected to the inner walls on both sides of the protective outer casing. The inner cavity of the metal protective casing is hollow, and a translation drive motor is fixedly connected to one end. Both ends of the side of the translation drive motor away from the inner wall of the metal protective casing are fixedly connected to a first slide rail. The other ends of the two first slide rails are fixed to the inner wall of the metal protective casing. A threaded drive rod is fixedly connected to the rotating shaft of the metal protective casing. The other end of the threaded drive rod is rotatably connected to the inner wall of the metal protective casing.

[0009] Preferably, a horizontal moving seat is movably sleeved on the two first slide rails. The horizontal moving seat is movably clamped on the rear inner wall of the metal protective casing. The horizontal moving seat is in threaded transmission connection with the threaded drive rod and can move through threaded transmission. A connecting block is fixedly connected to the front side of the horizontal moving seat. The connecting block extends to the front side of the metal protective casing and is fixedly connected to the installation plate. Two sliding grooves matching the connecting block on the horizontal moving seat are provided on the front side of the metal protective casing.

[0010] Preferably, the moving device further includes an extension plate, a second slide rail, a follower installation platform, and a pushing cylinder. Extension plates are fixedly connected to both ends of the upper side of the metal protective casing. Two symmetrically distributed second slide rails are fixedly connected between the two extension plates. A follower installation platform is movably sleeved on the second slide rails. A pushing cylinder is fixedly connected to the follower installation platform. The driving end of the pushing cylinder is movably inserted into the upper end of the installation plate.

[0011] Preferably, the lifting device includes an L-shaped mounting platform, a lifting electric push rod, and a compensation strut. Two symmetrically distributed limit columns are fixedly connected to the lower end of the front side of the mounting plate. The L-shaped mounting platform is movably connected to the limit columns. The driving end of the pushing cylinder extends to the side of the mounting plate away from the metal protective housing and is fixedly connected to the upper end of the L-shaped mounting platform. Four lifting electric push rods are fixedly connected to the upper side of the horizontal end of the L-shaped mounting platform at equal intervals. A compensation strut is movably inserted into the center of the upper side of the horizontal end of the L-shaped mounting platform.

[0012] Preferably, the push rods of the four lifting electric push rods are all movably inserted into the L-shaped mounting platform and extend to the lower end of the L-shaped mounting platform and are fixedly connected to a first metal mounting plate. The compensation strut is composed of three support columns arranged in parallel and at equal intervals. The lower end of the compensation strut is movably inserted into the first metal mounting plate and extends to the lower end of the first metal mounting plate and is fixedly connected to an annular fixing seat. The bottoms of the three annular fixing seats are fixedly connected to a second metal mounting plate.

[0013] Preferably, buffer springs I are sleeved on the sides of the three support columns of the compensation strut between the annular fixing seat and the first metal mounting plate. Buffer rods are fixedly connected to the four corners of the upper side of the second metal mounting plate. Buffer lifting grooves are formed directly above the four buffer rods in the inner cavity of the first metal mounting plate. The tops of the four buffer rods all extend movably into the corresponding buffer lifting grooves and are fixedly connected to limit sliders. The cross-sectional shapes of the limit sliders and the buffer lifting grooves are the same. The limit sliders can only move up and down in the buffer lifting grooves. A hydraulic pump is fixedly connected to the upper side of the second metal mounting plate. The hydraulic pump is connected to the water-oil sealing detection device.

[0014] Preferably, the fluid reaction force cancellation device includes a follow-up connection seat, a second sliding rod, a buffer spring I, a reaction force compensation cylinder, and a pneumatic pressure regulating air source. A follow-up connection seat is movably sleeved on the first sliding rod. The follow-up connection seat is in an inverted U shape. A third slide rail is fixedly connected between the inner side walls of the follow-up connection seat. A movable mounting plate is movably sleeved on the third slide rail. Buffer springs II are sleeved on the sides of the third slide rail corresponding to both ends of the movable mounting plate. One end of the lower side of the movable mounting plate is fixedly connected to a reaction force compensation cylinder. The other end of the lower side of the movable mounting plate is fixedly connected to a pneumatic pressure regulating air source.

[0015] Preferably, a flexible pressing block is fixedly connected to the bottom of the push rod of the reaction force compensation cylinder. A force sensor is fixedly connected to the lower side of the flexible pressing block. The force sensor is fixedly installed on the tops of the three compensation struts.

[0016] Preferably, air pipes are fixedly connected to both the upper and lower ends of the reaction force compensation cylinder. The other ends of the two air pipes are connected to a pneumatic regulation air source. A solenoid valve is fixedly connected to the lower air pipe, and a pressure reducing valve is fixedly connected to the upper air pipe.

[0017] (III) Advantageous Effects

[0018] Compared with the prior art, the present invention provides a lifting and positioning device for water and oil leak detection, having the following advantageous effects:

[0019] 1. The lifting and positioning device for water and oil leak detection can sense the magnitude and direction of the reaction force generated by the fluid on the cylinder body interface in real time through the force sensor. The control system calculates the required compensation force based on this and controls the reaction force compensation cylinder to apply a compensation force equal in magnitude and opposite in direction to the reaction force, thereby effectively resisting the interference of the fluid reaction force and ensuring the stability of the cylinder body during the detection process.

[0020] 2. In the fluid reaction force cancellation device of the lifting and positioning device for water and oil leak detection, the movable mounting plate is movably sleeved on the third slide rail, and buffer springs are arranged on both sides of the third slide rail to buffer the impact force of the cylinder action, ensuring the smooth application of the compensation force. At the same time, the reaction force compensation cylinders are symmetrically arranged, which can effectively cancel the fluid reaction force from multiple directions, prevent the cylinder body from shifting due to the reaction force, ensure the accurate positioning of the cylinder body, prevent the sealing tooling from disengaging or misaligning with the cylinder body interface, avoid the phenomena of "false leakage" or "false qualification", and ensure the accurate determination of product quality.

[0021] 3. Since the lifting and positioning device for water and oil leak detection can effectively resist the interference of the fluid reaction force and prevent the cylinder body from shifting, it reduces the uneven wear on the guiding mechanism of the positioning device caused by the long-term accumulated displacement deviation, thereby improving the repeat positioning accuracy of the positioning device, enabling subsequent detections to obtain accurate and reliable data, effectively solving the detection error problem caused by positioning deviation, eliminating the need for frequent manual calibration and equipment debugging on the production line, saving a large amount of time and labor costs, and significantly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present invention;

[0023] Figure 2 is a schematic diagram of the lifting device and the fixing plate of the detection device of the present invention;

[0024] Figure 3 is a schematic structural diagram of the moving device of the present invention;

[0025] Figure 4 is a schematic structural diagram of the lifting device of the present invention;

[0026] Figure 5Schematic diagram of the first metal mounting plate and the second metal mounting plate of the present invention;

[0027] Figure 6 Schematic diagram of the limit slider of the present invention;

[0028] Figure 7 Schematic diagram of the buffer lifting groove of the present invention;

[0029] Figure 8 Schematic diagram of the fluid reaction force cancellation device of the present invention;

[0030] Figure 9 Schematic diagram of the follower connection seat of the present invention.

[0031] In the figure: 1, protective base; 2, protective housing; 3, moving device; 4, first sliding rod; 5, fluid reaction force cancellation device; 6, mounting plate; 7, lifting device; 8, fixing plate of detection device; 9, metal protective housing; 10, translation driving motor; 11, first slide rail; 12, threaded driving rod; 13, horizontal moving seat; 14, extension plate; 15, second slide rail; 16, follower mounting table; 17, pushing cylinder; 18, L-shaped mounting table; 19, lifting electric push rod; 20, compensation strut; 21, first metal mounting plate; 22, annular fixing seat; 23, second metal mounting plate; 24, buffer rod; 25, limit slider; 26, buffer lifting groove; 27, follower connection seat; 28, second sliding rod; 29, first buffer spring; 30, reaction force compensation cylinder; 31, air pressure regulating air source; 32, solenoid valve; 33, pressure reducing valve; 34, flexible pressing block; 35, force sensor; 36, third slide rail; 37, second buffer spring; 38, movable mounting plate. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1-9, a lifting and positioning device for water and oil leak detection, comprising a protective base 1 and a protective outer casing 2. The protective base 1 is fixed to the ground by bolts. The upper end of the protective base 1 is provided with a protective outer casing 2. A moving device 3 is arranged at the rear ends of the inner walls on both sides of the protective outer casing 2. Two symmetrically arranged first sliding rods 4 are fixedly connected to the tops of the inner walls on both sides of the protective outer casing 2. A fluid reaction force cancellation device 5 is arranged on the first sliding rods 4. An installation plate 6 is arranged on the front side of the moving device 3. A lifting device 7 is arranged on the installation plate 6. The lower end of the lifting device 7 is provided with a detection device fixing plate 8. A water and oil tightness detection device for detecting the engine cylinder block is arranged at the bottom of the detection device fixing plate 8. A control system is arranged in the inner cavity of the protective base 1. The protective base 1 is fixed to the ground by bolts, providing a stable support foundation for the entire device. The control system arranged in its inner cavity serves to carry and protect the control system, ensuring the stable operation of each component during the operation of the device, avoiding affecting the device accuracy due to factors such as ground vibration. Protective outer casing 2: arranged at the upper end of the protective base 1, used to protect key components such as the moving device 3 and the fluid reaction force cancellation device 5 inside the device, preventing foreign objects and dust from entering the device interior, and at the same time providing a spatial framework for installing and supporting the internal components, ensuring the normal operating environment of the device. First sliding rods 4, fixedly connected to the tops of the inner walls on both sides of the protective outer casing 2, are symmetrically distributed, providing an installation and sliding track support for the fluid reaction force cancellation device 5, enabling the fluid reaction force cancellation device 5 to adjust its position or act along its direction, ensuring the stability and guiding property when the reaction force cancellation component works.

[0034] Further, the mobile device 3 includes a metal protective housing 9, a translation drive motor 10, a first slide rail 11, a threaded drive rod 12, and a horizontal moving seat 13. Metal protective housings 9 are fixedly connected to the inner walls on both sides of the protective housing body 2. The inner cavity of the metal protective housing 9 is hollow, and a translation drive motor 10 is fixedly connected to one end. Both ends of the side of the translation drive motor 10 away from the inner wall of the metal protective housing 9 are fixedly connected to a first slide rail 11. The other ends of the two first slide rails 11 are fixed to the inner wall of the metal protective housing 9. A threaded drive rod 12 is fixedly connected to the rotating shaft of the metal protective housing 9. The other end of the threaded drive rod 12 is rotatably connected to the inner wall of the metal protective housing 9. The metal protective housing 9 is fixedly connected to the inner walls on both sides of the protective housing body 2 and serves as the main frame of the mobile device 3. It is hollow inside for installing components such as the translation drive motor 10, the first slide rail 11, and the threaded drive rod 12, protecting the internal transmission components. At the same time, the sliding groove opened on its front side cooperates with the connecting block of the horizontal moving seat 13 to realize the stable movement guidance of the horizontal moving seat 13. The translation drive motor 10 drives the threaded drive rod 12 to rotate through the rotating shaft, providing power for horizontal movement; the first slide rail 11 is used to limit the movement direction of the horizontal moving seat 13 to ensure its smooth sliding along a straight line. The threaded drive rod 12 is in threaded cooperation with the horizontal moving seat 13, converting the rotational motion of the motor into the linear motion of the horizontal moving seat 13.

[0035] Further, a horizontal moving seat 13 is movably sleeved on the two first slide rails 11. The horizontal moving seat 13 is movably clamped to the rear inner wall of the metal protective housing 9. The horizontal moving seat 13 is in threaded transmission connection with the threaded drive rod 12 and can move through threaded transmission. A connecting block is fixedly connected to the front side of the horizontal moving seat 13. The connecting block extends to the front side of the metal protective housing 9 and is fixedly connected to a mounting plate 6. Two sliding grooves matching the connecting block on the horizontal moving seat 13 are opened on the front side of the metal protective housing 9. The sliding grooves provide a movement track for the connecting block of the horizontal moving seat 13 to ensure the stability and guidance of the mounting plate 6 during movement.

[0036] Further, the mobile device 3 further includes an extension plate 14, a second slide rail 15, a follower mounting table 16, and a pushing cylinder 17. Extension plates 14 are fixedly connected to both ends of the upper side of the metal protective housing 9. Two symmetrically distributed second slide rails 15 are fixedly connected between the two extension plates 14. A follower mounting table 16 is movably sleeved on the second slide rail 15. A pushing cylinder 17 is fixedly connected to the follower mounting table 16. The driving end of the pushing cylinder 17 is movably inserted into the upper end of the mounting plate 6.

[0037] Further, the lifting device 7 includes an L-shaped mounting table 18, a lifting electric push rod 19, and a compensation strut 20. Two symmetrically distributed limit columns are fixedly connected to the lower end of the front side of the mounting plate 6. The L-shaped mounting table 18 is movably connected to the limit columns. The driving end of the pushing cylinder 17 extends to the side of the mounting plate 6 away from the metal protective housing 9 and is fixedly connected to the upper end of the L-shaped mounting table 18. Four lifting electric push rods 19 are fixedly connected to the upper side of the horizontal end of the L-shaped mounting table 18 at equal intervals. A compensation strut 20 is movably inserted into the center of the upper side of the horizontal end of the L-shaped mounting table 18. The extension plate 14 and the second slide rail 15 form a sliding track in the Y-axis direction to support the movement of the follow-up mounting table 16. The pushing cylinder 17 drives the follow-up mounting table 16 to slide on the second slide rail 15, thereby driving the mounting plate 6 to be finely adjusted along the Y-axis to achieve precise alignment of the detection device and the cylinder block. The L-shaped mounting table 18 is movably connected to the mounting plate 6 through the limit columns, and the position of the lifting device is adjusted under the action of the pushing cylinder 17. The lifting electric push rod 19, as the lifting power source, drives the metal mounting plate one 21 to move vertically to achieve the lifting action of the detection device. The compensation strut 20 assists in supporting the metal mounting plate two 23 to provide buffering and stabilizing effects.

[0038] Further, the push rods of the four lifting electric push rods 19 are all movably inserted into the L-shaped mounting table 18 and extend to the lower end of the L-shaped mounting table 18 and are fixedly connected to the metal mounting plate one 21. The compensation strut 20 is composed of three support columns arranged in parallel and at equal intervals. The lower end of the compensation strut 20 is movably inserted into the metal mounting plate one 21 and extends to the lower end of the metal mounting plate one 21 and is fixedly connected to an annular fixing seat 22. The bottoms of the three annular fixing seats 22 are fixedly connected to the metal mounting plate two 23. The metal mounting plate one 21 is fixed to the push rod of the lifting electric push rod 19. When moving downward, the metal mounting plate two 23 is driven to descend synchronously through the annular fixing seat 22 to ensure the docking of the detection device and the cylinder block. The annular fixing seat 22 connects the metal mounting plate one 21 and the metal mounting plate two 23 to transmit the lifting power and keep the relative positions of the two stable.

[0039] Furthermore, buffer springs 29 are sleeved between the corresponding annular fixing seats 22 and the first metal mounting plate 21 on the sides of the three support columns of the compensation strut 20. Buffer rods 24 are fixedly connected to the four corners of the upper side of the second metal mounting plate 23. Buffer lifting grooves 26 are formed above the four buffer rods 24 in the inner cavity of the first metal mounting plate 21. The tops of the four buffer rods 24 are movably extended into the corresponding buffer lifting grooves 26 and fixedly connected with limit sliders 25. The limit sliders 25 have the same cross-sectional shape as the buffer lifting grooves 26, and the limit sliders 25 can only move up and down in the buffer lifting grooves 26. A hydraulic pump is fixedly connected to the upper side of the second metal mounting plate 23. The hydraulic pump is connected to the water-oil sealing detection device. The buffer rods 24 and the limit sliders 25 cooperate with the buffer lifting grooves 26 to limit the moving range of the second metal mounting plate 23, avoiding excessive displacement, and further buffering the impact through sliding friction. The hydraulic pump provides power for the water-oil sealing detection device to realize the pressurization and detection of the fluid.

[0040] Furthermore, the fluid reaction force cancellation device 5 includes a follow-up connection seat 27, a second sliding rod 28, a buffer spring 29, a reaction force compensation cylinder 30, and a pneumatic pressure regulating air source 31. A follow-up connection seat 27 is movably sleeved on the first sliding rod 4. The follow-up connection seat 27 is in an inverted U shape. A third sliding rail 36 is fixedly connected between the inner walls on both sides of the follow-up connection seat 27. A movable mounting plate 38 is movably sleeved on the third sliding rail 36. Buffer springs 37 are sleeved at both ends of the movable mounting plate 38 corresponding to the third sliding rail 36. One end of the lower side of the movable mounting plate 38 is fixedly connected with a reaction force compensation cylinder 30, and the other end of the lower side of the movable mounting plate 38 is fixedly connected with a pneumatic pressure regulating air source 31. The follow-up connection seat 27 is sleeved on the first sliding rod 4 through the second sliding rod 28 and can move horizontally along the top of the device, driving the reaction force compensation cylinder 30 to adjust the position. The movable mounting plate 38 slides on the third sliding rail 36 and cooperates with the buffer springs 37 to enable the reaction force compensation cylinder 30 to flexibly adjust the position and buffer the minute movement impacts. The reaction force compensation cylinder 30 applies a compensation force to cancel the fluid reaction force by contacting the surface of the cylinder body through a flexible pressing block 34. The force sensor 35 is used to detect the magnitude and direction of the reaction force in real time and provide a feedback signal for the control system to ensure accurate matching of the compensation force. A flexible pressing block 34 is fixedly connected to the bottom of the push rod of the reaction force compensation cylinder 30. A force sensor 35 is fixedly connected to the lower side of the flexible pressing block 34. The force sensor 35 is fixedly installed on the tops of the three compensation struts 20.

[0041] Further, air pipes are fixedly connected to both the upper and lower ends of the reaction force compensation cylinder 30. The other ends of the two air pipes are connected to the air pressure regulating air source 31. A solenoid valve 32 is fixedly connected to the lower air pipe, and a pressure reducing valve 33 is fixedly connected to the upper air pipe. The solenoid valve 32 is used to control the on-off of the air circuit and regulate the telescopic movement of the reaction force compensation cylinder 30; the pressure reducing valve 33 is used to regulate the air source pressure to ensure that the compensation force output by the cylinder is stable and controllable, and to avoid damage to the cylinder body due to excessive pressure.

[0042] Working principle: When the engine cylinder block is transported to the working area of the device, the translation drive motor 10 in the moving device is started, and its rotating shaft drives the threaded drive rod 12 to rotate. Since the horizontal moving seat 13 is in threaded transmission connection with the threaded drive rod 12, under the action of the threaded transmission, the horizontal moving seat 13 moves along the direction of the first slide rail 11, and then drives the mounting plate 6 to perform a translation in the X-axis direction through the connecting block, moving the lifting device 7 and the detection device fixing plate 8 above the cylinder block to be detected. During this process, the control system can control the pushing cylinder 17 to work, so that the pushing cylinder 17 pushes the L-shaped mounting table 18 to further adjust the lifting device 7 and the detection device fixing plate 8 to perform a Y-axis adjustment above the cylinder block to be detected, so that the sealing detection device fixedly connected to the lower side of the metal mounting plate two 23 can be accurately inserted into the engine cylinder block in subsequent operations.

[0043] Then, the four lifting electric push rods 19 in the lifting device are started synchronously. The push rods extend and drive the metal mounting plate one 21 to move downward. The buffer rods 24 clamped in the four buffer lifting grooves 26 of the metal mounting plate one 21 drive the limit sliders 25 to move downward, and the limit sliders 25 push the buffer rods 24 to drive the metal mounting plate two 23 to move downward synchronously with the metal mounting plate one 21; when the sealing detection devices at the bottom of the metal mounting plate two 23 are all inserted into the engine cylinder block to be detected, since there is still a distance between the top inner wall of the buffer lifting groove 26 and the limit slider 25, the metal mounting plate one 21 continues to move downward until the top of the limit slider 25 abuts against the top side inner wall of the buffer lifting groove 26. During this process, the lower side surface of the metal mounting plate one 21 is squeezed against a plurality of buffer springs one 29 sleeved on the compensation support rods 20. This can not only make the metal mounting plate one 21 move downward more stably, but also cause a certain contraction deformation of the buffer springs one 29 themselves. Combining with the distance between the lower side surface of the limit slider 25 and the bottom inner wall of the buffer lifting groove 26 at this time, a buffer space is reserved for the reaction force generated when the sealing detection device works later.

[0044] During the flow detection process, when the high-speed flowing water or oil generates a reaction force on the cylinder body interface, the force acts on the sealing detection device and is conducted along the metal mounting plate two 23 to the compensation strut 20, and then conducted upward through the compensation strut 20 to the force sensor 35 for detection. The force sensor 35 real-time senses the magnitude and direction of the reaction force and transmits the signal to the control system inside the protective base 1. After receiving the signal, the control system immediately calculates the required compensation force and issues commands to the solenoid valve 32 and the pressure reducing valve 33 in the fluid reaction force cancellation device. At this time, the gas output by the air pressure regulating air source 31 is regulated to the appropriate air pressure through the pressure reducing valve 33, and then the on-off of the gas path and the gas flow direction are controlled by the solenoid valve 32 and enter the reaction force compensation cylinder 30. The push rod of the reaction force compensation cylinder 30 extends under the action of the gas pressure, pushes the flexible pressing block 34 to closely contact the surface of the cylinder body, and applies a compensation force equal in magnitude and opposite in direction to the fluid reaction force. During this process, the reaction force compensation cylinder 30 is fixed on the movable mounting plate 38, and the movable mounting plate 38 is movably sleeved on the third slide rail 36, and the buffer springs two 37 on both sides of the third slide rail 36 can buffer the impact force during the operation of the cylinder, ensuring the smoothness of the application of the compensation force. At the same time, the sliding of the movable mounting plate 38 on the third slide rail 36 and the symmetrical arrangement of the reaction force compensation cylinder 30 can effectively cancel the fluid reaction force from multiple directions, ensuring that the cylinder body always remains stable during the detection process, avoiding displacement caused by the reaction force, and preventing the occurrence of "false leakage" or "false qualification" phenomena.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting and positioning device for water and oil leak detection, comprising a protective base (1) and a protective outer casing (2), wherein the protective base (1) is fixed to the ground by bolts, and the protective outer casing (2) is arranged at the upper end of the protective base (1), and is characterized in that: On the rear ends of the inner walls on both sides of the protective outer casing (2), a moving device (3) is provided. On the top of the inner walls on both sides of the protective outer casing (2), two symmetrically arranged first sliding rods (4) are fixedly connected. On the first sliding rods (4), a fluid reaction force cancellation device (5) is provided. On the front side of the moving device (3), a mounting plate (6) is provided. On the mounting plate (6), a lifting device (7) is provided. At the lower end of the lifting device (7), a detection device fixing plate (8) is provided. At the bottom of the detection device fixing plate (8), a water and oil sealing detection device for detecting the engine cylinder block is provided. Inside the protective base (1), a control system is provided.

2. The lifting and positioning device for water and oil leak detection according to claim 1, wherein: The moving device (3) includes a metal protective casing (9), a translation drive motor (10), a first slide rail (11), a threaded drive rod (12), and a horizontal moving seat (13). On the inner walls on both sides of the protective outer casing (2), the metal protective casing (9) is fixedly connected. The inner cavity of the metal protective casing (9) is hollow, and at one end, the translation drive motor (10) is fixedly connected. On both ends of the side of the translation drive motor (10) away from the inner wall of the metal protective casing (9), the first slide rails (11) are fixedly connected. The other ends of the two first slide rails (11) are fixed to the inner wall of the metal protective casing (9). At the rotating shaft of the metal protective casing (9), the threaded drive rod (12) is fixedly connected. The other end of the threaded drive rod (12) is rotatably connected to the inner wall of the metal protective casing (9).

3. The lifting and positioning device for water and oil leak detection according to claim 2, wherein: On the two first slide rails (11), the horizontal moving seat (13) is movably sleeved. The horizontal moving seat (13) is movably clamped to the rear inner wall of the metal protective casing (9). The horizontal moving seat (13) is in threaded transmission connection with the threaded drive rod (12) and can move through threaded transmission. On the front side of the horizontal moving seat (13), a connecting block is fixedly connected. The connecting block extends to the front side of the metal protective casing (9) and is fixedly connected to the mounting plate (6). On the front side of the metal protective casing (9), two sliding grooves matching the connecting block on the horizontal moving seat (13) are provided.

4. A lifting and positioning device for water and oil leak detection according to claim 2, characterized in that: The moving device (3) further includes an extension plate (14), a second slide rail (15), a follow-up mounting table (16), and a pushing cylinder (17). On both ends of the upper side of the metal protective casing (9), the extension plates (14) are fixedly connected. Between the two extension plates (14), two symmetrically distributed second slide rails (15) are fixedly connected. On the second slide rails (15), the follow-up mounting table (16) is movably sleeved. On the follow-up mounting table (16), the pushing cylinder (17) is fixedly connected. The driving end of the pushing cylinder (17) is movably inserted into the upper end of the mounting plate (6).

5. A lifting and positioning device for water and oil leak detection according to claim 4, characterized in that: The lifting device (7) includes an L-shaped mounting platform (18), a lifting electric push rod (19), and a compensation support rod (20). At the lower end of the front side of the mounting plate (6), two symmetrically distributed limit columns are fixedly connected. The L-shaped mounting platform (18) is movably connected to the limit columns. The driving end of the pushing cylinder (17) extends to the side of the mounting plate (6) away from the metal protective housing (9) and is fixedly connected to the upper end of the L-shaped mounting platform (18). Four lifting electric push rods (19) are fixedly connected to the upper side of the horizontal end of the L-shaped mounting platform (18) at equal intervals. A compensation support rod (20) is movably inserted into the center of the upper side of the horizontal end of the L-shaped mounting platform (18).

6. The lifting and positioning device for water and oil leak detection according to claim 5, characterized in that: The push rods of the four lifting electric push rods (19) are all movably inserted into the L-shaped mounting platform (18), and extend to the lower end of the L-shaped mounting platform (18) and are fixedly connected to a first metal mounting plate (21). The compensation support rod (20) is composed of three support columns arranged in parallel and at equal intervals. The lower end of the compensation support rod (20) is movably inserted into the first metal mounting plate (21) and extends to the lower end of the first metal mounting plate (21) and is fixedly connected to an annular fixing seat (22). The bottoms of the three annular fixing seats (22) are fixedly connected to a second metal mounting plate (23).

7. The lifting and positioning device for water and oil leak detection according to claim 6, characterized in that: Buffer springs I (29) are sleeved on the sides of the three support columns of the compensation support rod (20) corresponding to the annular fixing seat (22) and the first metal mounting plate (21). Buffer rods (24) are fixedly connected to the four corners of the upper side of the second metal mounting plate (23). Buffer lifting grooves (26) are opened directly above the four buffer rods (24) in the inner cavity of the first metal mounting plate (21). The tops of the four buffer rods (24) are movably extended into the corresponding buffer lifting grooves (26) and are fixedly connected to limit sliders (25). The cross-sectional shapes of the limit sliders (25) and the buffer lifting grooves (26) are the same. The limit sliders (25) can only move up and down in the buffer lifting grooves (26). A hydraulic pump is fixedly connected to the upper side of the second metal mounting plate (23). The hydraulic pump is connected to the water-oil sealing detection device.

8. A lifting and positioning device for water and oil leak detection according to claim 1, characterized in that: The fluid reaction force cancellation device (5) includes a follower connection seat (27), a second sliding rod (28), a buffer spring I (29), a reaction force compensation cylinder (30), and a pneumatic pressure regulating air source (31). A follower connection seat (27) is movably sleeved on the first sliding rod (4). The follower connection seat (27) is in an inverted U shape. A third sliding rail (36) is fixedly connected between the inner walls on both sides of the follower connection seat (27). A movable mounting plate (38) is movably sleeved on the third sliding rail (36). Buffer springs II (37) are sleeved on the sides of the third sliding rail (36) corresponding to both ends of the movable mounting plate (38). A reaction force compensation cylinder (30) is fixedly connected to one end of the lower side of the movable mounting plate (38). A pneumatic pressure regulating air source (31) is fixedly connected to the other end of the lower side of the movable mounting plate (38).

9. The lifting and positioning device for water and oil leak detection according to claim 8, characterized in that: A flexible pressing block (34) is fixedly connected to the bottom of the push rod of the reaction force compensation cylinder (30), a force sensor (35) is fixedly connected to the lower side of the flexible pressing block (34), and the force sensor (35) is fixedly installed at the top of the three compensation struts (20).

10. A lifting and positioning device for water and oil leak detection according to claim 8, characterized in that: Air pipes are fixedly connected to both the upper and lower ends of the reaction force compensation cylinder (30), the other ends of the two air pipes are connected to a pneumatic pressure regulating air source (31), a solenoid valve (32) is fixedly connected to the lower air pipe, and a pressure reducing valve (33) is fixedly connected to the upper air pipe.

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