Test device for in-cylinder sensors

Abstract

The present invention discloses a test device for an in-cylinder sensor. The test device for the in-cylinder sensor includes: a cylinder block, a piston rod, a cable displacement sensor to be tested, and a deep-water camera. The cylinder block includes a main cylinder and an auxiliary cylinder, and the main cylinder and the auxiliary cylinder are detachably connected. The piston of the piston rod is slidably arranged in the main cylinder along the axial direction of the main cylinder. The cable displacement sensor is connected to the auxiliary cylinder, and at least part of the cable displacement sensor is located in the main cylinder. The moving end of the cable of the cable displacement sensor is connected to the piston rod. The deep-water camera is connected to the main cylinder, and the deep-water camera is used to observe the operating state of the cable displacement sensor. By introducing hydraulic oil into the cylinder block to drive the piston rod to move, the effect of simulating the working condition of a hydraulic cylinder is achieved. The deep-water camera observes the state of the sensor in real time during the movement of the piston rod and records the image when the sensor fails to assist in fault analysis, thereby improving the accuracy of fault detection.

Description

Technical Field

[0001] The present invention relates to the technical field of fault detection, and particularly to a test device for an in-cylinder sensor of an oil cylinder. Background Art

[0002] A hydraulic cylinder includes components such as a cylinder block, a piston, and a cylinder rod. During the operation of the hydraulic cylinder, the piston is pushed to move linearly by the hydraulic oil in the cavity, thereby driving the cylinder rod to move linearly. Currently, during the operation of the hydraulic cylinder, a displacement sensor is usually provided to monitor the displacement of the linear movement of the cylinder rod to achieve precise control of the position of the piston rod.

[0003] However, during the use of the displacement sensor placed inside the oil cylinder, problems such as mechanical structure jamming, damage, and failure may occur. Since the displacement sensor is installed inside the oil cylinder, it is necessary to remove it when a fault occurs in the sensor to judge the cause of failure. However, when the sensor is removed for detection, it is difficult to determine the state in which the displacement sensor fails during the linear movement of the piston, which is not conducive to fault analysis and subsequent adjustment. Summary of the Invention

[0004] The present invention is made based on the inventor's discovery and recognition of the following facts and problems:

[0005] In the related art, the cylinder block of the oil cylinder is made of a transparent material, so that the operating state of the built-in sensor can be observed in real time. However, the commonly used transparent materials are not pressure-resistant and cannot restore the working conditions of coal mines and the like that use high-pressure liquids (31.5 MPa). Alternatively, a sensor is installed in a pressure test container, and the pressure test container is equipped with a camera, and the situation inside the container can be observed in real time. However, the pressure vessel only conducts pressure tests and it is difficult to simulate the liquid impact and cylinder vibration conditions caused by the start-stop and commutation of the piston during the piston movement process.

[0006] The present invention aims to solve at least one of the technical problems in the related art to some extent.

[0007] To this end, an embodiment of the present invention provides a test device for an in-cylinder sensor of an oil cylinder, which can simulate the working conditions of a hydraulic cylinder and accurately observe the operating state of the sensor in real time.

[0008] The test device for an in-cylinder sensor of an oil cylinder according to an embodiment of the present invention includes: a cylinder block, a piston rod, a wire rope displacement sensor, and a deep-water camera. The cylinder block includes a main cylinder and a sub-cylinder, the main cylinder is detachably connected to the sub-cylinder, the piston rod penetrates through the main cylinder along the axial direction of the main cylinder, the piston of the piston rod is slidably arranged in the main cylinder along the axial direction of the main cylinder, the wire rope displacement sensor is connected to the sub-cylinder, and at least part of the wire rope displacement sensor is located in the main cylinder. The movable end of the wire rope of the wire rope displacement sensor is connected to the piston rod, the deep-water camera is connected to the main cylinder, and the deep-water camera is used to observe the operating state of the wire rope displacement sensor.

[0009] The test device for an in-cylinder sensor of an oil cylinder according to an embodiment of the present invention drives the piston rod to move by introducing hydraulic oil into the cylinder block to achieve the effect of simulating the working conditions of a hydraulic oil cylinder. Then, the deep-water camera is used to observe the state of the wire rope displacement sensor during the movement of the piston rod in real time, and record the images when the wire rope displacement sensor fails, so as to help with fault analysis, thereby improving the accuracy of fault detection, and further facilitating the subsequent adjustment of the wire rope displacement sensor.

[0010] Thus, the test device for an in-cylinder sensor of an oil cylinder according to an embodiment of the present invention solves the problem of the detection test of the in-cylinder sensor of the oil cylinder.

[0011] In some embodiments, the main cylinder has a monitoring hole, the deep-water camera penetrates through the monitoring hole and is fixedly connected to the main cylinder, and the lens of the deep-water camera faces the wire rope displacement sensor.

[0012] In some embodiments, it further includes a protective shell. The protective shell is connected to the main cylinder, and the inner cavity of the protective shell is communicated with the inner cavity of the main cylinder. The deep-water camera is rotatably arranged in the protective shell, and the shooting angle of the deep-water camera is adjustable.

[0013] In some embodiments, it further includes an adjustment assembly. The adjustment assembly includes a rotating shaft, a sleeve, and a limiting ring. The protective shell is provided with a rotating hole, the rotating shaft penetrates through the rotating hole, one end of the rotating shaft located inside the protective shell is connected to the deep-water camera, the sleeve is sleeved on one end of the rotating shaft located outside the protective shell, and the sleeve is slidable along the axial direction of the rotating shaft. The outer peripheral wall of the sleeve has a limiting slider, the limiting ring is connected to the protective shell, and the limiting ring surrounds the sleeve. A plurality of limiting chutes are provided on the inner peripheral wall of the limiting ring, and the plurality of limiting chutes are spaced apart along the circumferential direction of the limiting ring. The limiting chutes extend along the axial direction of the limiting ring, and the limiting slider can slide into and out of the limiting chute, and the limiting slider is fitted in any one of the limiting chutes.

[0014] In some embodiments, the adjusting assembly further includes a star handle and a return spring. The star handle is connected to one end of the sleeve away from the protective housing. The return spring is located inside the sleeve. One end of the return spring is connected to the star handle, and the other end of the return spring is connected to the end of the rotating shaft outside the protective housing.

[0015] In some embodiments, the secondary cylinder includes a connecting portion and a cylinder base connected to each other. At least a part of the connecting portion is inserted into the main cylinder. The first end of the cable displacement sensor is clamped in the central through hole of the connecting portion, and the second end of the cable displacement sensor is located inside the main cylinder. The test device for the in-cylinder sensor of the oil cylinder further includes a fastener. The main cylinder has a first boss, and the cylinder base has a second boss. A first screw hole is provided on the first boss, and a second screw hole corresponding to the first screw hole is provided on the second boss. The fastener is in threaded cooperation with the first screw hole and the second screw hole respectively.

[0016] In some embodiments, a first annular seal and a second annular seal are further included. A first annular groove is provided on the surface of the first boss close to the second boss, and a second annular groove is provided on the surface of the second boss close to the first boss. Two ends of the first annular seal are respectively arranged in the first annular groove and the second annular groove. An annular clamping groove is provided on the outer peripheral wall of the cable displacement sensor, and at least a part of the second annular seal is clamped in the annular clamping groove. The outer peripheral wall of the second annular seal abuts against the hole wall of the central through hole of the connecting portion.

[0017] In some embodiments, a rotating ring, a cylindrical connecting piece, and a limiting stud are further included. The rotating ring is rotatably arranged on the end face of the piston rod close to the cable displacement sensor around its own central axis. Internal threads are provided on the hole wall of the central through hole of the rotating ring. The cylindrical connecting piece is connected to the moving end of the cable of the cable displacement sensor. External threads matching the internal threads are provided on the outer peripheral wall of the cylindrical connecting piece. The cylindrical connecting piece is in threaded connection with the rotating ring. A third screw hole is provided on the end face of the piston rod close to the cable displacement sensor, and a fourth screw hole corresponding to the third screw hole is provided on the rotating ring. The limiting stud is in threaded cooperation with the third screw hole and the fourth screw hole respectively.

[0018] In some embodiments, a limiting protrusion is provided on the inner peripheral wall of the main cylinder. The limiting protrusion is located on the side of the piston rod close to the cable displacement sensor.

[0019] In some embodiments, the cylinder base has a plurality of support columns. The plurality of support columns are spaced apart along the circumferential direction of the cylinder base. The support columns are arranged in the radial direction of the cylinder base. Description of the Drawings

[0020] Figure 1 is a schematic structural view of a test device for an in-cylinder sensor according to an embodiment of the present invention.

[0021] Figure 2 is a half-sectional view of a test device for an in-cylinder sensor according to an embodiment of the present invention.

[0022] Figure 3 is a right-side view of a test device for an in-cylinder sensor according to another embodiment of the present invention.

[0023] Figure 4 is a schematic structural view of a test device for an in-cylinder sensor according to another embodiment of the present invention.

[0024] Figure 5 is a half-sectional view of a test device for an in-cylinder sensor according to another embodiment of the present invention.

[0025] Figure 6 is Figure 3 the sectional view taken along A-A in

[0026] Figure 7 is Figure 6 the enlarged view of part A in

[0027] Figure 8 is a schematic view of a test device for an in-cylinder sensor according to another embodiment of the present invention after the limit slider slides out of the limit chute.

[0028] Figure 9 is a schematic view of the rotating shaft and the sleeve of a test device for an in-cylinder sensor according to another embodiment of the present invention.

[0029] Figure 10 is a schematic view of the sleeve and the limit ring of a test device for an in-cylinder sensor according to another embodiment of the present invention.

[0030] Figure 11 is Figure 5 the enlarged view of part B in

[0031] Reference Signs:

[0032] Cylinder block 1, main cylinder 11, first boss 111, limit projection 112, sub-cylinder 12, connecting portion 121, cylinder base 122, second boss 123, fastener 13, first annular seal 14,

[0033] Piston rod 2, rotating ring 21, limit stud 22, piston 23, cylinder rod 24,

[0034] Pull rope displacement sensor 3, second annular seal 31, cylindrical connecting piece 32,

[0035] Deep - water camera 4, protective shell 5,

[0036] Adjusting assembly 6, rotating shaft 61, sleeve 62, limit slider 621, limit ring 63, limit chute 631, star - shaped handle 64, return spring 65,

[0037] Support column 7. Detailed implementation mode

[0038] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0039] The test device for the in - cylinder sensor of the oil cylinder according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0040] As Figures 1 to 5 shown, the test device for the in - cylinder sensor of the oil cylinder according to the embodiment of the present invention includes: cylinder block 1, piston rod 2, pull rope displacement sensor 3 and deep - water camera 4. The cylinder block 1 includes a main cylinder 11 and an auxiliary cylinder 12, and the main cylinder 11 is detachably connected to the auxiliary cylinder 12. The piston rod 2 axially penetrates the main cylinder 11 along the axis of the main cylinder 11, and the piston 23 of the piston rod 2 is slidably arranged in the main cylinder 11 along the axis of the main cylinder 11. The pull rope displacement sensor 3 is connected to the auxiliary cylinder 12, and at least part of the pull rope displacement sensor 3 is located in the main cylinder 11. The moving end of the pull rope of the pull rope displacement sensor 3 is connected to the piston rod 2. The deep - water camera 4 is connected to the main cylinder 11, and the deep - water camera 4 is used to observe the operating state of the pull rope displacement sensor 3.

[0041] Optionally, as Figures 1 to 5 shown, the piston rod 2 includes a piston 23 and an oil cylinder rod 24. The oil cylinder rod 24 is arranged in the front - rear direction, and the oil cylinder rod 24 hermetically slides through the front end of the main cylinder 11. The piston 23 is slidably arranged in the main cylinder 11 in the front - rear direction, and the piston 23 is sleeved on the rear end of the oil cylinder rod 24. The piston 23 defines a rod - end chamber and a rodless chamber in the main cylinder 11. The rod - end chamber is located on the front side of the piston 23, and the rodless chamber is located on the rear side of the piston 23. Moreover, the main cylinder 11 has a first oil hole and a second oil hole. The first oil hole is adjacent to the front end of the main cylinder 11, and the first oil hole is communicated with the rod - end chamber. The second oil hole is adjacent to the rear end of the main cylinder 11, and the second oil hole is communicated with the rodless chamber.

[0042] Thus, for the test device for the in - cylinder sensor of the oil cylinder according to the embodiment of the present invention, by introducing hydraulic oil into the first oil hole or the second oil hole, the reciprocating movement of the piston rod 2 is driven, so as to simulate the operating conditions of the hydraulic oil cylinder. For example, as Figure 2 or Figure 5As shown, hydraulic oil is introduced into the rodless cavity through the second oil hole, and the hydraulic oil in the rod cavity is discharged through the first oil hole to drive the piston rod 2 to slide forward. Conversely, hydraulic oil is introduced into the rod cavity through the first oil hole, and the hydraulic oil in the rodless cavity is discharged through the second oil hole to drive the piston rod 2 to slide backward.

[0043] Optionally, as Figures 1 to 5 shown, the rope displacement sensor 3 to be tested is installed at the front end of the secondary cylinder 12, and the front end portion of the rope displacement sensor 3 is located in the rodless cavity. The movable end of the rope of the rope displacement sensor 3 extends out of the front end of the rope displacement sensor 3 and is connected to the rear end of the piston rod 2 to monitor the displacement of the piston rod 2, so as to restore the operation scenario of the rope sensor to be tested in the hydraulic cylinder. Moreover, the main cylinder 11 and the secondary cylinder 12 are detachably connected to facilitate the replacement of the rope displacement sensor 3 to be tested.

[0044] Furthermore, as Figures 1 to 5 shown, the deep - water camera 4 is connected to the main cylinder 11, and the deep - water camera 4 is used to observe the operation state of the rope displacement sensor 3 during the movement of the piston rod 2 in real time. For example, as Figures 1 to 2 shown, the deep - water camera 4 is fixedly installed on the main cylinder 11, and the lower end (camera) of the deep - water camera 4 is located in the rodless cavity and faces the rope displacement sensor 3. Or, as Figures 3 to 5 shown, a protective shell 5 is arranged on the periphery of the deep - water camera 4, and the protective shell 5 is communicated with the rodless cavity, that is, the deep - water camera 4 is entirely installed in the rodless cavity, and the shooting angle of the deep - water camera 4 is adjustable so that the deep - water camera 4 can photograph both the rope displacement sensor 3 and the rope of the rope displacement sensor 3 and the movement of the piston rod 2.

[0045] Specifically, the material selected for the cylinder block 1 is steel so that the cylinder block 1 can test the rope displacement sensor 3 under the working condition of high - pressure liquid (31.5 MPa). Compared with the related technologies where the oil cylinder is made of transparent materials and the sensor is installed in a pressure test container, the experimental device of the embodiment of the present invention can not only restore the working condition of high - pressure liquid but also simulate the liquid impact and the vibration working condition of the cylinder block 1 caused by the start - stop and commutation of the piston 23 during the movement of the piston 23.

[0046] Therefore, the experimental device for the in - cylinder sensor of the embodiment of the present invention drives the piston rod 2 to move by introducing hydraulic oil into the cylinder block 1 to achieve the effect of simulating the working condition of the hydraulic cylinder. Then, the deep - water camera 4 observes the state of the rope displacement sensor 3 during the movement of the piston rod 2 in real time and records the image when the rope displacement sensor 3 fails to assist in fault analysis, thereby improving the accuracy of fault detection and facilitating the subsequent adjustment of the rope displacement sensor 3.

[0047] In some embodiments, as Figure 1 and Figure 2 shown, the master cylinder 11 has a monitoring hole, the deep-water camera 4 penetrates through the monitoring hole and is fixedly connected to the master cylinder 11, and the lens of the deep-water camera 4 faces the cable displacement sensor 3.

[0048] Optionally, as Figure 1 and Figure 2 shown, a monitoring hole is provided on the outer peripheral wall of the master cylinder 11, and the monitoring hole communicates with the rodless cavity. The deep-water camera 4 penetrates through the monitoring hole, and the deep-water camera 4 is inclined so that the lens of the deep-water camera 4 faces the cable displacement sensor 3. The outer peripheral wall of the deep-water camera 4 is fixedly connected to the cylinder wall of the master cylinder 11 by welding. It can be understood that the way of fixedly connecting the deep-water camera 4 and the master cylinder 11 is simple and convenient in process manufacturing.

[0049] In some other embodiments, as Figures 3 to 6 shown, a protective shell 5 is further included. The protective shell 5 is connected to the master cylinder 11, and the inner cavity of the protective shell 5 communicates with the inner cavity of the master cylinder 11. The deep-water camera 4 is rotatably arranged in the protective shell 5, and the shooting angle of the deep-water camera 4 is adjustable.

[0050] Among them, as Figure 4 and Figure 5 shown, the protective shell 5 is in a cuboid shape, and the lower end of the protective shell 5 has an opening. A communication port is provided on the outer peripheral wall of the master cylinder 11, and the communication port communicates with the rodless cavity. The lower end of the protective shell 5 is connected to the peripheral wall of the master cylinder 11 by welding, and the opening of the protective shell 5 communicates with the communication port of the master cylinder 11, so that the inner cavity of the protective shell 5 communicates with the rodless cavity of the master cylinder 11.

[0051] Optionally, as Figures 3 to 6 shown, a clamp is sleeved on the lower end of the deep-water camera 4, and the left and right ends of the clamp are rotatably connected to the inner wall of the protective shell 5 through a short shaft arranged in the left-right direction, so that the shooting angle of the deep-water camera 4 is adjustable.

[0052] It can be understood that by adjusting the shooting angle of the deep-water camera 4, the deep-water camera 4 can shoot and record the operating state of the cable displacement sensor 3, and can also shoot and record the connection state between the cable of the cable displacement sensor 3 and the piston rod 2, as well as the state of the cable of the cable displacement sensor 3 (whether there are un-tightened states such as bending), so as to determine in what state of the linear motion of the piston 23 the displacement sensor fails, improve the diversity of observation, and be beneficial to fault analysis.

[0053] In some other embodiments, as Figures 3 to 10As shown in the figure, it further includes an adjusting component 6, and the adjusting component 6 includes a rotating shaft 61, a sleeve 62 and a limiting ring 63. A rotating hole is provided on the protective shell 5, and the rotating shaft 61 penetrates through the rotating hole. One end of the rotating shaft 61 located inside the protective shell 5 is connected to the deep-water camera 4. The sleeve 62 is sleeved on one end of the rotating shaft 61 located outside the protective shell 5, and the sleeve 62 is axially slidable along the rotating shaft 61. A limiting slider 621 is provided on the outer peripheral wall of the sleeve 62. The limiting ring 63 is connected to the protective shell 5 and surrounds the sleeve 62. A plurality of limiting chutes 631 are provided on the inner peripheral wall of the limiting ring 63. The plurality of limiting chutes 631 are circumferentially spaced along the limiting ring 63, and the limiting chutes 631 extend axially along the limiting ring 63. The limiting slider 621 can slide into and out of the limiting chute 631, and the limiting slider 621 is fitted in any one of the limiting chutes 631.

[0054] Optionally, as Figures 7 to 10 shown in the figure, a rotating hole is opened on the left end face of the protective shell 5. The rotating hole extends in the left-right direction and penetrates the left end face of the protective shell 5. The rotating shaft 61 is arranged in the left-right direction. The rotating shaft 61 penetrates through the rotating hole and is rotatably connected to the protective shell 5 in a sealed manner. The right end of the rotating shaft 61 is connected to the short shaft on the left side of the deep-water camera 4, so that the rotating shaft 61 rotates itself and drives the deep-water camera 4 to rotate.

[0055] The sleeve 62 is arranged in the left-right direction, and the sleeve 62 is sleeved on the left end of the rotating shaft 61. Four first chutes are provided on the inner peripheral wall of the sleeve 62. The four first chutes are circumferentially spaced along the sleeve 62. Four first sliders are provided on the outer peripheral wall of the left end of the rotating shaft 61. The four first sliders correspond to the four first chutes one by one, and the first sliders are slidably fitted in the corresponding first chutes, so that the sleeve 62 and the rotating shaft 61 can slide relative to each other in the left-right direction, and under the action of the first chutes and the first sliders, the sleeve 62 and the rotating shaft 61 can rotate synchronously.

[0056] The limiting ring 63 is arranged in the left-right direction, and the right end of the limiting ring 63 is connected to the left end face of the protective shell 5. The limiting ring 63 surrounds the sleeve 62 and the rotating shaft 61, and the central axis of the limiting ring 63 is coaxial with the central axis of the sleeve 62. A plurality of limiting chutes 631 are opened on the inner peripheral wall of the limiting ring 63. The plurality of limiting chutes 631 are circumferentially spaced along the limiting ring 63, and the limiting chutes 631 extend in the left-right direction. A limiting slider 621 is provided on the outer peripheral wall of the sleeve 62. The limiting slider 621 can slide into and out of the limiting chute 631, and the limiting slider 621 is fitted in any one of the limiting chutes 631.

[0057] Thus, as Figure 7As shown, when the limit slider 621 is located in any one of the limit chutes 631, the sleeve 62 cannot rotate under the action of the limit slider 621 and the limit chute 631. That is, the rotating shaft 61 cannot rotate, and the angle of the deep-sea camera 4 is in a locked state. As Figure 8 shown, after the limit slider 621 slides out of the limit chute 631 to the left, the limit slider 621 and the limit chute 631 release the restriction on the sleeve 62, so that the sleeve 62 can drive the rotating shaft 61 to rotate, thereby driving the deep-sea camera 4 to deflect to adjust the shooting angle of the deep-sea camera 4. That is, the angle of the deep-sea camera 4 is in an unlocked state.

[0058] In some other embodiments, as Figures 6 to 8 shown, the adjusting assembly 6 further includes a star-shaped handle 64 and a return spring 65. The star-shaped handle 64 is connected to the end of the sleeve 62 away from the protective housing 5. The return spring 65 is located inside the sleeve 62. One end of the return spring 65 is connected to the star-shaped handle 64, and the other end of the return spring 65 is connected to the end of the rotating shaft 61 outside the protective housing 5.

[0059] Optionally, as Figures 6 to 8 shown, the right end of the star-shaped handle 64 is connected to the left end of the sleeve 62. The return spring 65 is a tension spring. The return spring 65 is located inside the sleeve 62. The return spring 65 is arranged in the left-right direction. The left end of the return spring 65 is connected to the right end of the star-shaped handle 64, and the right end of the return spring 65 is connected to the left end of the rotating shaft 61.

[0060] It can be understood that, as Figure 7 shown, when the limit slider 621 is located in the limit chute 631, the return spring 65 is in a normal state. As Figure 8 shown, after the limit slider 621 slides out of the limit chute 631, the return spring 65 is in a stretched state. That is, the star-shaped handle 64 is pulled to drive the sleeve 62 to move leftward relative to the rotating shaft 61.

[0061] Thus, as Figure 7 shown, when the limit slider 621 is located in the limit chute 631, to prevent the piston rod 2 from causing the cylinder block 1 to vibrate during movement, resulting in the limit slider 621 disengaging from the limit chute 631, thereby causing a change in the shooting angle of the deep-sea camera 4. By providing the return spring 65 to tighten the star-shaped handle 64 and the rotating shaft 61, a certain restrictive effect is exerted on the sliding of the sleeve 62, so as to prevent the limit slider 621 from sliding out of the limit chute 631 under the vibration of the cylinder block 1. And, by providing the star-shaped handle 64, it is convenient for the operator to grip, improving the convenience of adjusting the shooting angle of the deep-sea camera 4.

[0062] In some embodiments, as Figure 2 or Figure 5As shown, the auxiliary cylinder 12 includes a connected connecting portion 121 and a cylinder base 122, and at least part of the connecting portion 121 is inserted into the main cylinder 11. The first end (rear end) of the cable displacement sensor 3 is clamped in the central through hole of the connecting portion 121, and the second end (front end) of the cable displacement sensor 3 is located in the main cylinder 11. The test device for the oil cylinder built-in sensor according to the embodiment of the present invention further includes a fastener 13. The main cylinder 11 has a first boss 111, and the cylinder base 122 has a second boss 123. A first screw hole is provided on the first boss 111, and a second screw hole corresponding to the first screw hole is provided on the second boss 123. The fastener 13 is in threaded fit with the first screw hole and the second screw hole respectively.

[0063] Optionally, as Figures 1 to 5 shown, both the connecting portion 121 and the cylinder base 122 are cylindrical, and both the connecting portion 121 and the cylinder base 122 have central through holes. The connecting portion 121 is inserted into the rodless cavity of the main cylinder 11, and the outer peripheral wall of the connecting portion 121 is in contact with the inner peripheral wall of the main cylinder 11. The rear end of the cable displacement sensor 3 is clamped in the central through hole of the connecting portion 121, and the front end of the cable displacement sensor 3 extends out of the central through hole of the connecting portion 121 and is located in the rodless cavity of the main cylinder 11 for the observation of the deep-water camera 4. The central through hole of the connecting portion 121 is communicated with the central through hole of the cylinder base 122, and the power cord of the cable displacement sensor 3 can extend out to the outside through the central through hole of the cylinder base 122.

[0064] The first boss 111 is located at the rear end of the main cylinder 11, and the second boss 123 is located at the front end of the cylinder base 122. The rear end face of the first boss 111 is in fit with the front end face of the second boss 123. A first screw hole extending in the front-rear direction is provided on the first boss 111, and a second screw hole extending in the front-rear direction is provided on the second boss 123. The front-rear positions of the first screw hole and the second screw hole correspond, and the sizes of the first screw hole and the second screw hole are the same. The fastener 13 is a screw, and the fastener 13 is in threaded fit with the second screw hole and the first screw hole in sequence from the rear to the front to detachably connect the main cylinder 11 and the auxiliary cylinder 12.

[0065] Furthermore, as Figures 1 to 5 shown, the fastener 13, the first screw hole and the second screw hole are all multiple. The multiple first screw holes are spaced along the circumferential direction of the main cylinder 11, the multiple second screw holes are spaced along the axial direction of the cylinder base 122, the multiple first screw holes and the multiple second screw holes correspond one by one, and the multiple fasteners 13 correspond to the multiple first screw holes one by one. Thus, by providing multiple fasteners 13, first screw holes and second screw holes, the connection reliability between the main cylinder 11 and the auxiliary cylinder 12 is improved.

[0066] In some embodiments, as Figure 2 or Figure 5As shown, it further includes a first annular seal 14 and a second annular seal 31. A first annular groove is provided on the surface of the first boss 111 close to the second boss 123, and a second annular groove is provided on the surface of the second boss 123 close to the first boss 111. Both ends of the first annular seal 14 are respectively arranged in the first annular groove and the second annular groove. An annular card slot is provided on the outer peripheral wall of the pull rope displacement sensor 3, at least part of the second annular seal 31 is clamped in the annular card slot, and the outer peripheral wall of the second annular seal 31 abuts against the hole wall of the central through hole of the connecting portion 121.

[0067] Optionally, as Figure 2 or Figure 5 shown, a first annular groove is formed on the rear end face of the first boss 111, and the first annular groove is located inside the first screw hole. A second annular groove is formed on the front end face of the second boss 123, the second annular groove is located inside the second screw hole, and the first annular groove is communicated with the second annular groove to form an annular limiting groove. The first annular seal 14 is an elastic sealing ring, and the first annular seal 14 is arranged in the annular limiting groove. Thus, the first annular seal 14 prevents the hydraulic oil in the main cylinder 11 from leaking out through the gap between the main cylinder 11 and the auxiliary cylinder 12.

[0068] Optionally, as Figure 2 or Figure 5 shown, the second annular seal 31 is an elastic sealing ring, the second annular seal 31 is clamped in the annular card slot, and the outer peripheral wall of the second annular seal 31 abuts against the hole wall of the central through hole of the connecting portion 121. Thus, the second annular seal 31 not only plays a role in clamping the pull rope displacement sensor 3 in the central through hole of the connecting portion 121, but also plays a role in sealing the gap between the outer peripheral wall of the pull rope displacement sensor 3 and the hole wall of the central through hole of the connecting portion 121, preventing the hydraulic oil in the main cylinder 11 from leaking out.

[0069] In some embodiments, as Figure 5 and Figure 11 shown, it further includes a rotating ring 21, a cylindrical connecting piece 32 and a limiting stud 22. The rotating ring 21 is rotatably arranged on the end face of the piston rod 2 close to the pull rope displacement sensor 3 around its own central axis, and internal threads (not shown in the figure) are provided on the hole wall of the central through hole of the rotating ring 21. The cylindrical connecting piece 32 is connected to the moving end of the pull rope of the pull rope displacement sensor 3, external threads (not shown in the figure) matching the internal threads are provided on the outer peripheral wall of the cylindrical connecting piece 32, and the cylindrical connecting piece 32 is threadedly connected to the rotating ring 21. A third screw hole is provided on the end face of the piston rod 2 close to the pull rope displacement sensor 3, a fourth screw hole corresponding to the third screw hole is provided on the rotating ring 21, and the limiting stud 22 is threadedly engaged with the third screw hole and the fourth screw hole respectively.

[0070] Optionally, as Figure 5 andFigure 11 As shown, the central axis of the rotating ring 21 is coaxial with the central axis of the piston rod 2. The rotating ring 21 is provided on the rear end face of the piston rod 2 and can rotate around its own central axis. An internal thread is provided on the inner wall of the central through hole of the rotating ring 21, and an external thread matching the internal thread is provided on the outer peripheral wall of the cylindrical connecting member 32. The cylindrical connecting member 32 is threadedly connected to the rotating ring 21 so that the cylindrical connecting member 32 and the rotating ring 21 are detachably connected.

[0071] Further, as Figure 5 and Figure 11 shown, a third screw hole extending in the front-rear direction is provided on the rear end face of the piston rod 2, and a fourth screw hole extending in the front-rear direction is provided on the rotating ring 21. The front-rear positions of the fourth screw hole and the third screw hole correspond to each other. The limit stud 22 is threadedly engaged with the third screw hole and the fourth screw hole respectively, so that the limit stud 22 restricts the rotation of the rotating ring 21.

[0072] When installing the cylindrical connecting member 32, the limit stud 22 is threadedly engaged with the third screw hole and the fourth screw hole at the same time, so that the rotating ring 21 is in a fixed state. The cylindrical connecting member 32 is screwed into the rotating ring 21. At this time, the pull rope rotates together with the cylindrical connecting member 32. After the cylindrical connecting member 32 and the rotating ring 21 are installed, the limit stud 22 is disengaged from the third screw hole and the fourth screw hole, and then the rotating ring 21 is rotated to synchronously drive the cylindrical connecting member 32 and the pull rope to rotate. After the pull rope returns to its initial state, at the same time, the third screw hole and the fourth screw hole also return to the corresponding front-rear positions, and then the limit stud 22 is threadedly engaged with the third screw hole and the fourth screw hole. Thus, it is avoided that the pull rope is screwed during the assembly process of the cylindrical connecting member 32, resulting in a monitoring error of the pull rope displacement sensor 3.

[0073] In some embodiments, as Figure 2 or Figure 5 shown, a limit protrusion 112 is provided on the inner peripheral wall of the main cylinder 11. The limit protrusion 112 is located on the side of the piston rod 2 close to the pull rope displacement sensor 3.

[0074] Optionally, as Figure 2 or Figure 5 shown, the limit protrusion 112 is located on the rear side of the piston rod 2, that is, the limit protrusion 112 is located in the rodless cavity. It can be understood that by providing the limit protrusion 112, the moving range of the piston rod 2 is restricted, and the piston rod 2 is prevented from colliding with the deep water camera 4 and the pull rope displacement sensor 3.

[0075] In some embodiments, as Figure 1 or Figure 4 shown, the cylinder block 122 has a plurality of support columns 7. The plurality of support columns 7 are circumferentially spaced apart along the cylinder block 122, and the support columns 7 are arranged radially along the cylinder block 122.

[0076] Optionally, as Figure 1 shown, there are two support columns 7, and the two support columns 7 are symmetrically arranged on the left and right sides of the cylinder seat 122. It can be understood that during the simulation test, for the test device with an in-cylinder sensor in the embodiment of the present invention, the support column 7 is used to be fixed to the workbench, and the fixing method can be plugging, welding, etc.

[0077] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0078] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0079] In the present invention, unless otherwise clearly defined and limited, the terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0081] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0082] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present invention.

Claims

1. A test device for an in-cylinder sensor, characterized in that Comprising: A cylinder block, the cylinder block includes a main cylinder and an auxiliary cylinder, and the main cylinder is detachably connected to the auxiliary cylinder; A piston rod, the piston rod penetrates the main cylinder along the axial direction of the main cylinder, and the piston of the piston rod is slidably arranged in the main cylinder along the axial direction of the main cylinder; A wire rope displacement sensor, the wire rope displacement sensor is connected to the auxiliary cylinder, and at least part of the wire rope displacement sensor is located in the main cylinder, and the moving end of the wire rope of the wire rope displacement sensor is connected to the piston rod; A deep-water camera, the deep-water camera is connected to the main cylinder, and the deep-water camera is used to observe the operating state of the wire rope displacement sensor; It further includes a protective shell, the deep-water camera is rotatably arranged in the protective shell, the shooting angle of the deep-water camera is adjustable, and it further includes an adjusting assembly, and the adjusting assembly includes: A rotating shaft, a rotating hole is provided on the protective shell, the rotating shaft penetrates the rotating hole, and one end of the rotating shaft located inside the protective shell is connected to the deep-water camera; A sleeve, the sleeve is sleeved on one end of the rotating shaft located outside the protective shell, and the sleeve is slidable along the axial direction of the rotating shaft, and a limiting slider is provided on the outer peripheral wall of the sleeve; A limiting ring, the limiting ring is connected to the protective shell, and the limiting ring surrounds the sleeve, a plurality of limiting chutes are provided on the inner peripheral wall of the limiting ring, the plurality of limiting chutes are spaced apart along the circumferential direction of the limiting ring, the limiting chutes extend along the axial direction of the limiting ring, the limiting slider can slide into the limiting chute and can slide out of the limiting chute, and the limiting slider is fitted in any one of the limiting chutes; Four first chutes are provided on the inner peripheral wall of the sleeve, the four first chutes are spaced apart along the circumferential direction of the sleeve, and four first sliders are provided on the outer peripheral wall of the left end of the rotating shaft, the four first sliders correspond to the four first chutes one by one, and the first slider is slidably fitted in the corresponding first chute.

2. The test device for the in-cylinder sensor according to claim 1, characterized in that, The main cylinder has a monitoring hole, the deep-water camera penetrates the monitoring hole and is fixedly connected to the main cylinder, and the lens of the deep-water camera faces the wire rope displacement sensor.

3. The test device for the in-cylinder sensor according to claim 1, characterized in that, The protective shell is connected to the main cylinder, and the inner cavity of the protective shell is communicated with the inner cavity of the main cylinder.

4. The test device for the in-cylinder sensor according to claim 1, characterized in that, The adjusting assembly further includes: A star-shaped handle, the star-shaped handle is connected to one end of the sleeve away from the protective shell; A return spring, the return spring is located inside the sleeve, one end of the return spring is connected to the star-shaped handle, and the other end of the return spring is connected to one end of the rotating shaft located outside the protective shell.

5. The test device for the in-cylinder sensor according to claim 1, characterized in that, The auxiliary cylinder includes a connected connecting portion and a cylinder seat, at least part of the connecting portion is inserted into the main cylinder, the first end of the wire rope displacement sensor is clamped in the central through hole of the connecting portion, and the second end of the wire rope displacement sensor is located inside the main cylinder; The test device for the in-cylinder sensor of the oil cylinder further includes a fastener. The main cylinder has a first boss, the cylinder seat has a second boss, a first screw hole is provided on the first boss, a second screw hole corresponding to the first screw hole is provided on the second boss, and the fastener is in threaded cooperation with the first screw hole and the second screw hole respectively.

6. The test device for the in-cylinder sensor according to claim 5, characterized in that, It further includes: A first annular seal. A first annular groove is provided on the surface of the first boss close to the second boss, a second annular groove is provided on the surface of the second boss close to the first boss, and both ends of the first annular seal are respectively arranged in the first annular groove and the second annular groove. A second annular seal. An annular clamping groove is provided on the outer peripheral wall of the cable displacement sensor, at least part of the second annular seal is clamped in the annular clamping groove, and the outer peripheral wall of the second annular seal abuts against the hole wall of the central through hole of the connecting part.

7. The test device for the in-cylinder sensor according to claim 1, characterized in that, It further includes: A rotating ring which is rotatably arranged on the end face of the piston rod close to the cable displacement sensor around its own central axis, and an internal thread is provided on the hole wall of the central through hole of the rotating ring. A cylindrical connecting piece which is connected to the moving end of the cable of the cable displacement sensor. An external thread matching the internal thread is provided on the outer peripheral wall of the cylindrical connecting piece, and the cylindrical connecting piece is in threaded connection with the rotating ring. A limit stud. A third screw hole is provided on the end face of the piston rod close to the cable displacement sensor, a fourth screw hole corresponding to the third screw hole is provided on the rotating ring, and the limit stud is in threaded cooperation with the third screw hole and the fourth screw hole respectively.

8. The test device for the in-cylinder sensor according to claim 1, characterized in that A limit projection is provided on the inner peripheral wall of the main cylinder, and the limit projection is located on the side of the piston rod close to the cable displacement sensor.

9. The test device for the in-cylinder sensor according to claim 5, characterized in that, The cylinder seat has a plurality of support columns, and the plurality of support columns are distributed at intervals along the circumferential direction of the cylinder seat, and the support columns are arranged along the radial direction of the cylinder seat.

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