CN115217816A - Test setup for sensors built into cylinders - Google Patents

Abstract

The invention discloses a test device for a built-in sensor of an oil cylinder, which comprises: the deep water camera is connected with the main cylinder, and is used for observing the running state of the stay rope displacement sensor. Hydraulic oil is introduced into the cylinder body to drive the piston rod to move, and the effect of simulating the working condition of the hydraulic oil cylinder is achieved. The deep water camera observes the state of the sensor in the motion process of the piston rod in real time, and records images when the sensor fails so as to assist in fault analysis and improve the accuracy of fault detection.

Description

Test setup for sensors built into cylinders

technical field

The invention relates to the technical field of fault detection, in particular to a test device for a sensor built in an oil cylinder.

Background technique

The hydraulic cylinder includes components such as cylinder block, piston and cylinder rod. During the working process of the hydraulic cylinder, the hydraulic oil in the cavity pushes the piston to move in a straight line, thereby pushing the cylinder rod to move in a straight line. At present, in the working process of the hydraulic cylinder, a displacement sensor is usually installed to monitor the displacement of the linear motion of the cylinder rod, so as to realize the precise control of the position of the piston rod.

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 cylinder, it needs to be taken out when the sensor fails to judge the cause of the failure. However, when the sensor is taken out for inspection, it is difficult to determine the state in which the displacement sensor fails during the linear motion of the piston, which is not conducive to failure analysis and subsequent adjustment.

SUMMARY OF THE INVENTION

The present invention is made based on the inventors' findings and understanding of the following facts and problems:

In the related art, the cylinder body of the oil cylinder is made of transparent material, so that the running state of the built-in sensor can be observed in real time, but the commonly used transparent material is not pressure-resistant and cannot restore the working conditions of high-pressure liquid (31.5MPa) such as coal mines. Alternatively, a sensor is installed in the pressure test vessel. The pressure test vessel is equipped with a camera, and the situation in the vessel can be observed in real time. However, the pressure vessel only performs pressure experiments, and it is difficult to simulate the start, stop and reversal of the piston during the movement of the piston. The liquid shock and cylinder vibration conditions.

The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

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

The test device for the sensor built in the oil cylinder according to the embodiment of the present invention includes: a cylinder body, a piston rod, a cable displacement sensor and a deep water camera, the cylinder body includes a main cylinder and an auxiliary cylinder, and the main cylinder and the auxiliary cylinder can be are detachably connected, the piston rod penetrates the master cylinder along the axial direction of the master cylinder, the piston of the piston rod is slidably arranged in the master cylinder along the axial direction of the master cylinder, and the pull The rope displacement sensor is connected with the auxiliary cylinder, and at least part of the rope displacement sensor is located in the main cylinder, the moving end of the rope of the rope displacement sensor is connected with the piston rod, and the deep water camera Connected to the master cylinder, the deep-water camera is used to observe the running state of the pull-rope displacement sensor.

In the test device for the built-in sensor in the oil cylinder according to the embodiment of the present invention, the hydraulic oil is introduced into the cylinder to drive the movement of the piston rod, so as to achieve the effect of simulating the working condition of the hydraulic oil cylinder. Then, the state of the cable displacement sensor during the movement of the piston rod is observed in real time through the deep-water camera, and the image of the cable displacement sensor when a fault occurs is recorded to help the failure analysis, thereby improving the accuracy of fault detection, and then for the follow-up. The adjustment of the cable displacement sensor provides convenience.

Therefore, the test device for the sensor built in the oil cylinder according to the embodiment of the present invention solves the problem of the detection test of the sensor built in the oil cylinder.

In some embodiments, the master tank has a monitoring hole, the deep-water camera penetrates through the monitoring hole and is fixedly connected to the master tank, and the lens of the deep-water camera faces the pull-rope displacement sensor.

In some embodiments, a protective shell is further included, the protective shell is connected with the master cylinder, and the inner cavity of the protective shell is communicated with the inner cavity of the master cylinder, and the deep-water camera is rotatably arranged on the Inside the protective shell, the shooting angle of the deep-water camera can be adjusted.

In some embodiments, an adjustment assembly is further included, the adjustment assembly includes a rotating shaft, a sleeve and a limit ring, a rotating hole is formed on the protective shell, the rotating shaft passes through the rotating hole, and the rotating shaft The end inside the protective shell is connected to the deep-water camera, the sleeve is sleeved on the end of the rotating shaft outside the protective shell, and the sleeve is along the axial direction of the rotating shaft It is slidable, the outer peripheral wall of the sleeve is provided with a limit slider, the limit ring is connected with the protective shell, and the limit ring surrounds the sleeve, and the inner peripheral wall of the limit ring is A plurality of limit chutes are provided, and the plurality of limit chutes are distributed at intervals along the circumferential direction of the limit ring, the limit chutes extend along the axial direction of the limit ring, and the limit The slider can slide into the limit chute and can slide out from the limit chute, and the limit slider is matched in any of the limit chute.

In some embodiments, the adjustment assembly further comprises a star-shaped handle and a return spring, the star-shaped handle is connected to an end of the sleeve away from the protective shell, the return spring is located in 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 the end of the rotating shaft outside the protective shell.

In some embodiments, the auxiliary cylinder includes a connecting part and a cylinder base which are connected together, at least part of the connecting part is inserted into the master cylinder, and the first end of the cable displacement sensor is clamped on the In the central through hole of the connecting part, the second end of the cable displacement sensor is located in the master cylinder, the test device for the sensor built in the oil cylinder further includes a fastener, and the master cylinder has a first boss , the cylinder seat has a second boss, the first boss is provided with a first screw hole, the second boss is provided with a second screw hole corresponding to the first screw hole, so The fastener is screwed with the first screw hole and the second screw hole respectively.

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 the second boss is A second annular groove is provided on the surface of the seal near the first boss, the two ends of the first annular seal are respectively set in the first annular groove and the second annular groove, and the pull rope An annular clamping groove is provided on the outer peripheral wall of the displacement sensor, at least part of the second annular sealing member is clamped in the annular clamping groove, and the outer peripheral wall of the second annular sealing member and the center of the connecting portion The hole walls of the through holes abut against each other.

In some embodiments, it also includes a rotating ring, a cylindrical connecting piece and a limit stud, and the rotating ring is rotatably provided on the end surface of the piston rod close to the pulling rope displacement sensor around its central axis, so An inner thread is provided on the hole wall of the central through hole of the rotating ring, the cylindrical connecting piece is connected with the moving end of the pull rope of the pull rope displacement sensor, and the outer peripheral wall of the cylindrical connecting piece is provided with The inner thread is matched with the outer thread, the cylindrical connecting piece is threadedly connected with the rotating ring, the end face of the piston rod close to the cable displacement sensor is provided with a third screw hole, and the rotating ring is provided with a third screw hole. A fourth screw hole corresponding to the third screw hole is provided on the upper surface, and the limit stud is screwed with the third screw hole and the fourth screw hole respectively.

In some embodiments, a limiting protrusion is provided on the inner peripheral wall of the master cylinder, and the limiting protrusion is located on a side of the piston rod that is close to the cable displacement sensor.

In some embodiments, the cylinder base has a plurality of support columns, the plurality of support columns are distributed at intervals along the circumference of the cylinder base, and the support columns are arranged along the radial direction of the cylinder base.

Description of drawings

FIG. 1 is a schematic structural diagram of a test device for a sensor built in a cylinder according to an embodiment of the present invention.

FIG. 2 is a schematic half-sectional view of a test device for a sensor built into a cylinder according to an embodiment of the present invention.

FIG. 3 is a schematic right side view of a test device for an in-cylinder sensor according to another embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a test device for a sensor built in a cylinder according to another embodiment of the present invention.

FIG. 5 is a schematic half-sectional view of a test device for a sensor built into a cylinder according to another embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view of A-A in FIG. 3 .

FIG. 7 is an enlarged schematic view of part A in FIG. 6 .

FIG. 8 is a schematic diagram of a limit slider of another embodiment of the present invention used for a test device with built-in sensor in an oil cylinder after sliding out of the limit chute.

9 is a schematic diagram of a rotating shaft and a sleeve of a test device for a sensor built in a cylinder according to another embodiment of the present invention.

10 is a schematic diagram of a sleeve and a limit ring of a test device for a sensor built in a cylinder according to another embodiment of the present invention.

FIG. 11 is an enlarged schematic view of part B in FIG. 5 .

Reference number:

Cylinder block 1, master cylinder 11, first boss 111, limiting protrusion 112, auxiliary cylinder 12, connecting part 121, cylinder seat 122, second boss 123, fastener 13, first annular seal 14,

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

The cable displacement sensor 3, the second annular seal 31, the cylindrical connecting piece 32,

Deep water camera 4, protective case 5,

Adjustment assembly 6, rotating shaft 61, sleeve 62, limit slider 621, limit ring 63, limit chute 631, star handle 64, return spring 65,

Support column 7.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

The following describes a test device for a sensor built in a cylinder according to an embodiment of the present invention with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 5 , the test device for the sensor built in the oil cylinder according to the embodiment of the present invention includes: a cylinder block 1 , a piston rod 2 , a cable displacement sensor 3 and a deep-water camera 4 . The cylinder block 1 includes a master cylinder 11 and an auxiliary cylinder 12 , and the master cylinder 11 and the auxiliary cylinder 12 are detachably connected. The piston rod 2 penetrates the master cylinder 11 along the axial direction of the master cylinder 11 , and the piston 23 of the piston rod 2 is slidably arranged in the master cylinder 11 along the axial direction of the master cylinder 11 . The cable displacement sensor 3 is connected to the auxiliary cylinder 12 , and at least part of the cable displacement sensor 3 is located in the master cylinder 11 , and the moving end of the cable of the cable displacement sensor 3 is connected to the piston rod 2 . The deep-water camera 4 is connected to the main tank 11 , and the deep-water camera 4 is used to observe the running state of the pull-rope displacement sensor 3 .

Optionally, as shown in FIG. 1 to FIG. 5 , 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 seals and slides through the front end of the master cylinder 11 . The piston 23 is slidably disposed in the master cylinder 11 along the front-rear direction, and the piston 23 is sleeved on the rear end of the oil cylinder rod 24 . The piston 23 defines the master cylinder 11 with a rod cavity and a rodless cavity. The rod cavity is located on the front side of the piston 23 , and the rodless cavity is located on the rear side of the piston 23 . Moreover, the master cylinder 11 has a first oil hole and a second oil hole, the first oil hole is adjacent to the front end of the master cylinder 11, the first oil hole is communicated with the rod cavity, and the second oil hole is adjacent to the rear end of the master cylinder 11, The second oil hole is communicated with the rodless cavity.

Therefore, in the test device for the built-in sensor in the oil cylinder according to the embodiment of the present invention, the hydraulic oil is fed into the first oil hole or the second oil hole to drive the reciprocating motion of the piston rod 2, thereby simulating the operation of the hydraulic oil cylinder. working condition. For example, as shown in Fig. 2 or Fig. 5, the 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, so as to drive the piston rod 2 to slide forward . On the contrary, the 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, so as to drive the piston rod 2 to slide backward.

Optionally, as shown in FIGS. 1 to 5 , the cable displacement sensor 3 to be tested is installed at the front end of the auxiliary cylinder 12 , and the front end portion of the cable displacement sensor 3 is located in the rodless cavity. The moving end of the rope of the rope displacement sensor 3 protrudes from the front end of the rope displacement sensor 3 and is connected to the rear end of the piston rod 2 to achieve the purpose of monitoring the displacement of the piston rod 2, thereby restoring the rope sensor to be tested in the A scene of operation inside a hydraulic cylinder. In addition, the master cylinder 11 and the auxiliary cylinder 12 are detachably connected to facilitate the replacement of the cable displacement sensor 3 to be tested.

Further, as shown in FIG. 1 to FIG. 5 , the deep-water camera 4 is connected to the master cylinder 11 , and the deep-water camera 4 is used for real-time observation of the running state of the rope displacement sensor 3 during the movement of the piston rod 2 . For example, as shown in FIG. 1 to FIG. 2 , the deep-water camera 4 is fixedly mounted on the master cylinder 11 , and the lower end (camera) of the deep-water camera 4 is located in the rodless cavity and faces the pull-rope displacement sensor 3 . Alternatively, as shown in FIGS. 3 to 5 , 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 cameras 4 are all installed in the rodless cavity, and the deep-water camera 4 is installed in the rodless cavity. The shooting angle of 4 can be adjusted, so that the deep water camera 4 can not only photograph the cable displacement sensor 3 but also the movement of the cable and the piston rod 2 of the cable displacement sensor 3 .

Specifically, the material selected for the cylinder block 1 is steel, so that the cylinder block 1 can test the cable displacement sensor 3 under the working condition of high pressure liquid (31.5MPa). Compared with the related art, in which the oil cylinder is made of transparent material and the sensor is installed in the 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 movement process of the piston 23. The fluid shock and the vibration condition of the cylinder 1 caused by the start-stop and reversal of the piston 23 in the middle.

Therefore, the test device for the built-in sensor in the oil cylinder according to the embodiment of the present invention drives the piston rod 2 to move by injecting hydraulic oil into the cylinder body 1, so as to achieve the effect of simulating the working conditions of the hydraulic oil cylinder. Then, the state of the cable displacement sensor 3 during the movement of the piston rod 2 is observed in real time through the deep-water camera 4, and the image of the cable displacement sensor 3 when a fault occurs is recorded to assist in fault analysis, thereby improving the accuracy of fault detection. , thereby facilitating the subsequent adjustment of the rope displacement sensor 3 .

In some embodiments, as shown in FIG. 1 and FIG. 2 , the main tank 11 has a monitoring hole, the deep water camera 4 penetrates the monitoring hole and is fixedly connected to the main tank 11 , and the lens of the deep water camera 4 faces the cable displacement sensor 3 .

Optionally, as shown in FIG. 1 and FIG. 2 , the outer peripheral wall of the master cylinder 11 is provided with a monitoring hole, and the monitoring hole communicates with the rodless cavity. The deep water camera 4 penetrates 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 . It can be understood that the way of the fixed connection between the deep water camera 4 and the main tank 11 is simple and convenient to manufacture.

In other embodiments, as shown in FIG. 3 to FIG. 6 , a protective shell 5 is further included, the protective shell 5 is connected with the master cylinder 11 , and the inner cavity of the protective shell 5 is communicated 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 can be adjusted.

Among them, as shown in FIGS. 4 and 5 , the protective case 5 is in the shape of a cube, and the lower end of the protective case 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 with the peripheral wall of the master cylinder 11 by welding, and the opening of the protective shell 5 is communicated with the communication port of the master cylinder 11, so that the inner cavity of the protective shell 5 is connected with the rodless cavity of the master cylinder 11. Pass.

Optionally, as shown in FIG. 3 to FIG. 6 , the lower end of the deep-water camera 4 is sleeved with a clamp, and the left and right ends of the clamp are rotatably connected to the inner wall of the protective shell 5 through short shafts arranged in the left-right direction. , so that the shooting angle of the deep water camera 4 can be adjusted.

It can be understood that by adjusting the shooting angle of the deep-water camera 4, the deep-water camera 4 can record the running state of the rope displacement sensor 3, and can also record the connection between the rope of the rope displacement sensor 3 and the piston rod 2. state, and the state of the pull rope of the pull rope displacement sensor 3 (whether there is a non-tight state such as bending), so as to determine the state in which the displacement sensor fails during the linear motion of the piston 23, and improve the diversity of observations , which is helpful for failure analysis.

In other embodiments, as shown in FIGS. 3 to 10 , an adjustment assembly 6 is further included, and the adjustment assembly 6 includes a rotating shaft 61 , a sleeve 62 and a limit ring 63 . The protective shell 5 is provided with a rotating hole, and the rotating shaft 61 penetrates the rotating hole. The end of the rotating shaft 61 inside the protective casing 5 is connected to the deep water camera 4 , the sleeve 62 is sleeved on the end of the rotating shaft 61 outside the protective casing 5 , and the sleeve 62 is slidable along the axial direction of the rotating shaft 61 . A limit slider 621 is provided on the outer peripheral wall of the sleeve 62 , the limit ring 63 is connected with the protective shell 5 , and the limit ring 63 surrounds the sleeve 62 . The inner peripheral wall of the limit ring 63 is provided with a plurality of limit chutes 631 , the plurality of limit chutes 631 are distributed along the circumferential direction of the limit ring 63 at intervals, and the limit chutes 631 extend along the axial direction of the limit ring 63 . . The limit slider 621 can slide into the limit slot 631 and can slide out from the limit slot 631 , and the limit slider 621 fits in any limit slot 631 .

Optionally, as shown in FIGS. 7 to 10 , a turning hole is formed on the left end surface of the protective shell 5 , and the turning hole extends along the left-right direction and penetrates the left end surface of the protective shell 5 . The rotating shaft 61 is disposed along the left-right direction, and the rotating shaft 61 penetrates through the rotating hole and is connected with the protective shell 5 in a sealing and rotating manner. The right end of the rotating shaft 61 is connected with the short shaft on the left side of the deep-water camera 4 , so that the rotating shaft 61 rotates and drives the deep-water camera 4 to rotate.

The sleeve 62 is disposed along the left-right direction, and the sleeve 62 is sleeved on the left end of the rotating shaft 61 . The inner peripheral wall of the sleeve 62 is provided with four first sliding grooves, and the four first sliding grooves are distributed at intervals along the circumference of the sleeve 62 . There are four first sliding blocks on the outer peripheral wall of the left end of the rotating shaft 61 , the four first sliding blocks are in one-to-one correspondence with the four first sliding grooves, and the first sliding blocks are slidably fitted in the corresponding first sliding grooves. , so that the sleeve 62 and the rotating shaft 61 can slide relatively along the left and right directions, and under the action of the first sliding groove and the first sliding block, the sleeve 62 and the rotating shaft 61 can rotate synchronously.

The limiting ring 63 is disposed along the left-right direction, and the right end of the limiting ring 63 is connected to the left end surface 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 . The inner peripheral wall of the limit ring 63 is provided with a plurality of limit chutes 631 , the plurality of limit chutes 631 are arranged at intervals along the circumferential direction of the limit ring 63 , and the limit chutes 631 extend in the left-right direction. There is a limit slider 621 on the outer peripheral wall of the sleeve 62 , the limit slider 621 can slide into the limit slot 631 and can slide out from the limit slot 631 , and the limit slider 621 is matched with any limit inside the chute 631.

Therefore, as shown in FIG. 7 , when the limit slider 621 is located in any limit chute 631 , the sleeve 62 cannot rotate under the action of the limit slider 621 and the limit chute 631 , that is, the The rotation shaft 61 cannot be rotated, and the angle of the deep-water camera 4 is in a locked state. As shown in FIG. 8 , 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 be driven to rotate The shaft 61 rotates, thereby driving the deep-water camera 4 to deflect to adjust the shooting angle of the deep-water camera 4 , that is, the angle of the deep-water camera 4 is in an unlocked state.

In other embodiments, as shown in FIGS. 6 to 8 , the adjustment assembly 6 further includes a star-shaped handle 64 and a return spring 65 . The star-shaped handle 64 is connected with the end of the sleeve 62 away from the protective shell 5, the return spring 65 is located in the sleeve 62, one end of the return spring 65 is connected with the star-shaped handle 64, and the other end of the return spring 65 is located in the rotating shaft 61. One end outside the protective shell 5 is connected.

Optionally, as shown in FIGS. 6 to 8 , the right end of the star 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 in the sleeve 62, the return spring 65 is arranged in the left and right direction, the left end of the return spring 65 is connected with the right end of the star handle 64, and the right end of the return spring 65 is connected with the left end of the rotating shaft 61. connected.

It can be understood that, as shown in FIG. 7 , when the limit slider 621 is located in the limit chute 631 , the return spring 65 is in a normal state. As shown in FIG. 8 , after the limit slider 621 slides out of the limit chute 631 , the return spring 65 is in a stretched state, that is, pulls the star handle 64 and drives the sleeve 62 to move leftward relative to the rotating shaft 61 .

Therefore, as shown in FIG. 7 , when the limit slider 621 is located in the limit chute 631 , in order to prevent the cylinder 1 from vibrating during the movement of the piston rod 2 , the limit slider 621 is separated from the limit chute 631 , thereby causing the shooting angle of the deep-water camera 4 to change. By setting the return spring 65 to tighten the star handle 64 and the rotating shaft 61 , the sliding of the sleeve 62 is limited to a certain extent, so as to prevent the limit slider 621 from slipping out of the limit slide under the vibration of the cylinder 1 . Slot 631. In addition, by providing the star-shaped handle 64, it is convenient for the operator to grasp, and the convenience of adjusting the shooting angle of the deep-water camera 4 is improved.

In some embodiments, as shown in FIG. 2 or FIG. 5 , the auxiliary cylinder 12 includes a connecting part 121 and a cylinder base 122 , and at least part of the connecting part 121 is inserted into the master 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 master cylinder 11 . The test device for the sensor built into the oil cylinder according to the embodiment of the present invention further includes a fastener 13 , the master cylinder 11 has a first boss 111 , the cylinder base 122 has a second boss 123 , and the first boss 111 is provided with a first boss 111 . A screw hole, the second boss 123 is provided with a second screw hole corresponding to the first screw hole, and the fastener 13 is screwed with the first screw hole and the second screw hole respectively.

Optionally, as shown in FIGS. 1 to 5 , the connecting portion 121 and the cylinder base 122 are both cylindrical, and both the connecting portion 121 and the cylinder base 122 have a central through hole. The connecting portion 121 is inserted into the rodless cavity of the master cylinder 11 , and the outer peripheral wall of the connecting portion 121 is in contact with the inner peripheral wall of the master 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 protrudes from the central through hole of the connecting portion 121 and is located in the rodless cavity of the master cylinder 11, so as to facilitate deep water Observation of 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 be extended to the outside through the central through hole of the cylinder base 122 .

The first boss 111 is located at the rear end of the master cylinder 11 , the second boss 123 is located at the front end of the cylinder base 122 , and the rear end surface of the first boss 111 is abutted with the front end surface of the second boss 123 . The first boss 111 is provided with a first screw hole extending in the front-rear direction, the second boss 123 is provided with a second screw hole extending in the front-rear direction, the first screw hole corresponds to the front and rear positions of the second screw hole, And the size of the first screw hole is the same as the size of the second screw hole. The fastener 13 is a screw, and the fastener 13 is screwed with the second screw hole and the first screw hole in sequence from the rear to the front, so that the master cylinder 11 and the auxiliary cylinder 12 are detachably connected.

Further, as shown in FIG. 1 to FIG. 5 , there are multiple fasteners 13 , first screw holes and second screw holes. The multiple first screw holes are distributed at intervals along the circumference of the master cylinder 11 . The two screw holes are distributed at intervals along the axial direction of the cylinder base 122 , the plurality of first screw holes and the plurality of second screw holes are in one-to-one correspondence, and the plurality of fasteners 13 are in one-to-one correspondence with the plurality of first screw holes. Therefore, the reliability of the connection between the master cylinder 11 and the auxiliary cylinder 12 is improved by providing a plurality of fasteners 13 , the first screw holes and the second screw holes.

In some embodiments, as shown in FIG. 2 or FIG. 5 , a first annular seal 14 and a second annular seal 31 are further included. The surface of the first boss 111 close to the second boss 123 is provided with a first annular groove, the surface of the second boss 123 close to the first boss 111 is provided with a second annular groove, and the first annular seal 14 The two ends of the ring are respectively arranged in the first annular groove and the second annular groove. The outer peripheral wall of the cable displacement sensor 3 is provided with an annular groove, at least part of the second annular seal 31 is clamped in the annular groove, the outer peripheral wall of the second annular seal 31 and the central through hole of the connecting portion 121 the wall of the hole.

Optionally, as shown in FIG. 2 or FIG. 5 , a first annular groove is formed on the rear end surface of the first boss 111 , and the first annular groove is located inside the first screw hole. The front end surface of the second boss 123 is provided with a second annular groove, the second annular groove is located inside the second screw hole, and the first annular groove communicates with the second annular groove to form an annular limiting groove. The first annular sealing member 14 is an elastic sealing ring, and the first annular sealing member 14 is arranged in the annular limiting groove. Therefore, the hydraulic oil in the master cylinder 11 is prevented from leaking out through the gap connecting the master cylinder 11 and the auxiliary cylinder 12 by the first annular seal 14 .

Optionally, as shown in FIG. 2 or FIG. 5 , the second annular seal 31 is an elastic sealing ring, the second annular seal 31 is clamped in the annular groove, and the outer peripheral wall of the second annular seal 31 is connected to the The hole walls of the central through hole of the part 121 abut against each other. Therefore, the second annular sealing member 31 not only functions to clamp the cable displacement sensor 3 in the central through hole of the connecting portion 121 , but also functions to seal the outer peripheral wall of the cable displacement sensor 3 and the connecting portion 121 . The role of the gap between the hole walls of the central through hole prevents the hydraulic oil in the master cylinder 11 from leaking out.

In some embodiments, as shown in FIG. 5 and FIG. 11 , a rotating ring 21 , a cylindrical connecting piece 32 and a limiting stud 22 are further included. The rotating ring 21 is rotatably provided on the end surface of the piston rod 2 close to the cable displacement sensor 3 around its central axis, and the hole wall of the central through hole of the rotating ring 21 is provided with an internal thread (not shown in the figure). The cylindrical connecting piece 32 is connected with the moving end of the pull rope of the pull rope displacement sensor 3, and the outer peripheral wall of the cylindrical connecting piece 32 is provided with an external thread (not shown in the figure) that matches the internal thread. 32 is screwed with the rotating ring 21 . A third screw hole is provided on the end surface of the piston rod 2 close to the cable displacement sensor 3, a fourth screw hole corresponding to the third screw hole is provided on the rotating ring 21, and the limit stud 22 is respectively connected with the third screw hole It is threaded with the fourth screw hole.

Optionally, as shown in FIG. 5 and FIG. 11 , the central axis of the rotating ring 21 is coaxial with the central axis of the piston rod 2, the rotating ring 21 is arranged on the rear end surface of the piston rod 2, and the rotating ring 21 can be adjusted around its own central axis. turn. An inner thread is arranged on the hole wall of the central through hole of the rotating ring 21, an outer thread matching the inner thread is arranged on the outer peripheral wall of the cylindrical connecting piece 32, and the cylindrical connecting piece 32 is threadedly connected with the rotating ring 21, so that the The cylindrical connecting member 32 is detachably connected to the rotating ring 21 .

Further, as shown in FIG. 5 and FIG. 11 , the rear end surface of the piston rod 2 is provided with a third screw hole extending in the front-rear direction, and the rotating ring 21 is provided with a fourth screw hole extending in the front-rear direction. The holes correspond to the front and rear positions of the third screw holes, and the limiting studs 22 are screwed with the third screw holes and the fourth screw holes respectively, so that the limiting studs 22 limit the rotation of the rotating ring 21 .

When installing the cylindrical connecting piece 32, the limit stud 22 is screwed 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, and the cylindrical connecting piece 32 is screwed into the rotating ring 21, At this time, the pull rope rotates together with the cylindrical connecting piece 32 . After the cylindrical connecting piece 32 and the rotating ring 21 are installed, disengage the limiting stud 22 from the third screw hole and the fourth screw hole, and then rotate the rotating ring 21 and simultaneously drive the cylindrical connecting piece 32 and the pull rope to rotate. , after the pull rope is restored to the initial state, the third screw hole and the fourth screw hole are also restored to the front and rear positions corresponding to each other, and then the limit stud 22 is threadedly matched with the third screw hole and the fourth screw hole. In this way, during the assembling process of the cylindrical connecting piece 32 , the twisting of the pull rope is avoided, thereby causing the monitoring error of the pull rope displacement sensor 3 .

In some embodiments, as shown in FIG. 2 or FIG. 5 , a limiting protrusion 112 is provided on the inner peripheral wall of the master cylinder 11 , and the limiting protrusion 112 is located on the side of the piston rod 2 close to the cable displacement sensor 3 .

Optionally, as shown in FIG. 2 or FIG. 5 , the limiting protrusion 112 is located on the rear side of the piston rod 2 , that is, the limiting protrusion 112 is located in the rodless cavity. It can be understood that by setting the limiting protrusion 112 , the movement range of the piston rod 2 is limited, and the collision between the piston rod 2 and the deep-water camera 4 and the cable displacement sensor 3 is avoided.

In some embodiments, as shown in FIG. 1 or FIG. 4 , the cylinder seat 122 has a plurality of support columns 7 , the plurality of support columns 7 are distributed at intervals along the circumference of the cylinder seat 122 , and the support columns 7 are along the radial direction of the cylinder seat 122 . set up.

Optionally, as shown in FIG. 1 , there are two supporting columns 7 , and the two supporting columns 7 are symmetrically arranged on the left and right sides of the cylinder base 122 . It can be understood that, during the simulation test, in the test device for the built-in sensor in the oil cylinder of the embodiment of the present invention, the support column 7 is used for fixing with the workbench, and the fixing method can be plugging, welding or the like.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. 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 situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean a specific feature, structure, material, or description described in connection with the embodiment or example. Features are included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the above-mentioned embodiments have been shown and described, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention, and those of ordinary skill in the art can make changes, modifications, substitutions and alterations to the above-mentioned embodiments. All fall within the protection scope of the present invention.

Claims (10)

1. a test device for a built-in sensor in an oil cylinder, is characterized in that, comprising: a cylinder block, the cylinder block includes a master cylinder and an auxiliary cylinder, the master cylinder and the auxiliary cylinder are detachably connected; a piston rod, which penetrates the master cylinder along the axial direction of the master cylinder, and the piston of the piston rod is slidably arranged in the master cylinder along the axial direction of the master cylinder; A cable displacement sensor, 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, and the moving end of the cable of the cable displacement sensor is connected to the Piston rod connected; A deep-water camera, which is connected to the main tank, is used for observing the running state of the pull-rope displacement sensor. 2 . The test device for a sensor built into an oil cylinder according to claim 1 , wherein the master cylinder has a monitoring hole, the deep-water camera penetrates the monitoring hole and is fixedly connected to the master cylinder, and the The lens of the deep water camera is directed towards the cable displacement sensor. 3 . The test device for a sensor built into an oil cylinder according to claim 1 , further comprising a protective shell, the protective shell is connected to the master cylinder, and the inner cavity of the protective shell is connected to the main cylinder. 4 . The inner cavity of the tank is communicated, the deep-water camera is rotatably arranged in the protective shell, and the shooting angle of the deep-water camera can be adjusted. 4. The test device for a sensor built into an oil cylinder according to claim 3, further comprising an adjustment assembly, the adjustment assembly comprising: a rotating shaft, the protective casing is provided with a rotating hole, the rotating shaft penetrates the rotating hole, and one end of the rotating shaft located in the protective casing is connected to the deep-water camera; a sleeve, the sleeve is sleeved on one end of the rotating shaft outside the protective shell, the sleeve is slidable along the axial direction of the rotating shaft, and the outer peripheral wall of the sleeve has a limited bit slider; A limit ring, the limit ring is connected with the protective shell, and the limit ring surrounds the sleeve, the inner peripheral wall of the limit ring is provided with a plurality of limit chute, a plurality of the The limit chute is spaced along the circumference of the limit ring, the limit chute extends along the axial direction of the limit ring, and the limit slider can slide into the limit chute and It can be slid out from the limit chute, and the limit slider is matched in any of the limit chute. 5. The test device for a sensor built into an oil cylinder according to claim 4, wherein the adjustment assembly further comprises: a star-shaped handle, the star-shaped handle is connected with one end of the sleeve away from the protective shell; Return spring, the return spring is located in the sleeve, one end of the return spring is connected with the star handle, and the other end of the return spring is connected with the end of the rotating shaft outside the protective shell . 6 . The test device for a sensor built into an oil cylinder according to claim 1 , wherein the auxiliary cylinder comprises a connecting part and a cylinder seat, and at least part of the connecting part is inserted into the master cylinder. 7 . , 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 in the master cylinder; The test device for the built-in sensor in an oil cylinder further comprises a fastener, the master cylinder has a first boss, the cylinder base has a second boss, and the first boss is provided with a first screw hole, The second boss is provided with a second screw hole corresponding to the first screw hole, and the fastener is screwed with the first screw hole and the second screw hole respectively. 7. The test device for a sensor built in an oil cylinder according to claim 6, further comprising: A first annular seal, a first annular groove is formed on the surface of the first boss close to the second boss, and a first annular groove is formed on the surface of the second boss close to the first boss. Two annular grooves, two ends of the first annular seal are respectively set in the first annular groove and the second annular groove; The second annular seal, the outer peripheral wall of the cable displacement sensor is provided with an annular groove, at least part of the second annular seal is clamped in the annular groove, and the second annular seal is The outer peripheral wall is abutted against the hole wall of the central through hole of the connecting portion. 8. The test device for a sensor built in an oil cylinder according to claim 1, further comprising: a rotating ring, the rotating ring is rotatably arranged on the end surface of the piston rod close to the pulling rope displacement sensor around its central axis, and an inner thread is provided on the hole wall of the central through hole of the rotating ring; A cylindrical connecting piece, the cylindrical connecting piece is connected with the moving end of the pull rope of the pull rope displacement sensor, and the outer peripheral wall of the cylindrical connecting piece is provided with an external thread matching the internal thread, so the cylindrical connecting piece is screwed with the rotating ring; A limit stud, the end face of the piston rod close to the cable displacement sensor is provided with a third screw hole, and the rotating ring is provided with a fourth screw hole corresponding to the third screw hole, so The limiting stud is screwed with the third screw hole and the fourth screw hole respectively. 9 . The test device for a sensor built into an oil cylinder according to claim 1 , wherein the inner peripheral wall of the master cylinder is provided with a limit protrusion, and the limit protrusion is located near the piston rod. 10 . the side of the pull cord displacement sensor. 10 . The test device for a sensor built into an oil cylinder according to claim 6 , wherein 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 10 . The support column is arranged along the radial direction of the cylinder seat.

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