Optical fiber level measuring instrument

Abstract

The utility model discloses an optical fiber level measuring instrument, which belongs to the technical field of gas cabinets and comprises an outer mounting seat, an inner mounting seat is rotatably connected to the inner wall of the outer mounting seat, a rotation driving mechanism is assembled between the inner mounting seat and the outer mounting seat, an optical fiber displacement sensor is fixedly connected to the inner part of the inner mounting seat, and the optical fiber displacement sensor is fixedly connected to the inner wall of the inner mounting seat. The top end and the bottom end of the optical fiber displacement sensor respectively extend to the upper part and the lower part of the inner mounting seat; according to the utility model, the rotatable optical fiber displacement sensor is arranged, during measurement, each initial position of the gas chamber piston is measured through the rotatable optical fiber displacement sensor, then each real-time position of the gas chamber piston is measured through the rotatable optical fiber displacement sensor, and the gas chamber piston can be accurately measured by comparing the initial position data and the real-time position data of the gas chamber piston. The gradient of the gas chamber piston is judged based on the material level measurement result, so that timely treatment is facilitated, and compared with the prior art, the material level measurement precision can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas cabinets, and in particular relates to an optical fiber level measuring instrument. Background Art

[0002] A gas tank is a steel container for storing industrial and domestic gas, including wet gas tanks and dry gas tanks. The dry gas tank is a piston structure sealed with thin oil or soft film. During its operation, the piston moves frequently and is prone to tilt. If not discovered and handled in time, it is easy to cause major production safety accidents. Therefore, it is particularly important to measure the tilt of the gas tank piston.

[0003] Chinese Patent No. 02215480.9 discloses a gas tank piston tilt fiber-optic measuring device, wherein a piston is arranged in the gas tank, four steel wires are arranged at equal intervals along the circumferential direction on the top of the piston, four steel wire winding devices are arranged at equal intervals along the circumferential direction on the outside of the gas tank, a counterweight is arranged at the other end of the four steel wires after passing through the four steel wire winding devices, a fiber-optic sensor is arranged on the steel wire winding device, an optical fiber is arranged on the fiber-optic sensor, and an electrical room is arranged at the other end of the optical fiber. When the device measures the tilt of the gas tank piston, the optical fiber sensor detects the movement of the four steel wires and transmits the movement to the electrical room through the optical fiber. After the electrical room calculates the signal transmitted by the optical fiber, the position data of the gas tank piston is measured to determine its tilt.

[0004] The inventors of the present application have discovered that the above-mentioned existing gas tank piston tilt fiber optic measurement device detects the movement of a steel wire through a fiber optic sensor to determine the tilt of the piston. However, the surface of the steel wire may deform during the long-term winding process, which may easily affect the measurement accuracy of the fiber optic sensor, thereby reducing the measurement accuracy of the device. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides an optical fiber level measuring instrument, which has the characteristic of being able to improve the accuracy of level measurement.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an optical fiber level measuring instrument, comprising: an outer mounting seat, the inner wall of the outer mounting seat is rotatably connected to an inner mounting seat, a rotation drive mechanism is installed between the inner mounting seat and the outer mounting seat, an optical fiber displacement sensor is fixedly connected to the inside of the inner mounting seat, the top and bottom ends of the optical fiber displacement sensor extend to the top and bottom of the inner mounting seat respectively, and the rotation drive mechanism and the optical fiber displacement sensor are electrically connected to the gas tank control system.

[0007] Furthermore, the outer mounting seat and the inner mounting seat are rotatably connected via a bearing.

[0008] Furthermore, the rotation drive mechanism includes a set motor, a mounting frame fixedly connected to the top of the outer mounting seat, and an inner gear ring fixedly connected to the inner wall of the inner mounting seat, the vertical section of the mounting frame is connected to a third drive shaft through a bearing, the third drive shaft is sleeved with a second hollow drive shaft on the side close to the motor, the second hollow drive shaft is connected to the output end of the motor through a coupling on the end close to the motor, the third drive shaft is fixedly sleeved with a first conical wheel on the end away from the motor, the horizontal section of the mounting frame is connected to the first drive shaft through a bearing, the top of the first drive shaft is fixedly sleeved with a second conical wheel meshing with the first conical wheel, the bottom of the first drive shaft is fixedly sleeved with a gear meshing with the inner gear ring, and the motor is electrically connected to the gas tank control system.

[0009] Furthermore, it also includes: a gas cabinet, wherein a piston is arranged inside the gas cabinet, a motor is fixedly connected to the outer wall of the gas cabinet above the piston by bolts, an outer mounting seat is fixedly connected to the gas cabinet above the piston by bolts, and an optical fiber of the optical fiber displacement sensor penetrates the gas cabinet and extends to the outside of the gas cabinet.

[0010] Furthermore, an adjustment mechanism is installed between the third driving shaft and the second hollow driving shaft, and the adjustment mechanism includes a screw with a handle threadedly connected to the mounting frame and located below the third driving shaft, two movable limit grooves symmetrically opened on the third driving shaft close to the motor side, two movable limit blocks symmetrically fixed to the inner wall of the second hollow driving shaft close to the third driving shaft side, and a movable seat fixedly sleeved on the outer wall of the second hollow driving shaft, the handle of the screw with a handle is close to the first conical wheel side, the two movable limit blocks extend into the two movable limit grooves and are movably connected, and the movable seat is connected to the screw with a handle through a transmission nut.

[0011] Furthermore, a mounting groove is provided on the inner wall of the gas cabinet above the piston, and the second hollow drive shaft is located in the mounting groove when extended and is detached from the mounting groove when not extended.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with a rotatable optical fiber displacement sensor. During measurement, the initial positions of the gas tank piston are first measured by the rotatable optical fiber displacement sensor, and then the real-time positions of the gas tank piston are measured by the rotatable optical fiber displacement sensor. The level measurement is realized by comparing the initial position and real-time position data of the gas tank piston. The inclination of the gas tank piston is determined based on the level measurement result so as to be processed in time. Compared with the prior art, the accuracy of the level measurement can be improved.

[0014] 2. The position between the third drive shaft and the second hollow drive shaft of the utility model is adjustable, which does not affect the normal operation of the optical fiber level measuring instrument. At the same time, it is convenient to disassemble and assemble the optical fiber level measuring instrument during maintenance or overhaul, thereby improving the practical performance of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 For this utility model Figure 1 Cross-section at A in the middle;

[0017] Figure 3 This is a schematic diagram of the installation of the utility model;

[0018] Figure 4 For this utility model Figure 3 Enlarged view of point B in the middle;

[0019] In the figure: 1, outer mounting seat; 2, first drive shaft; 3, inner mounting seat; 4, gear; 5, mounting frame; 6, motor; 7, first conical wheel; 8, second conical wheel; 9, inner gear ring; 10, optical fiber displacement sensor; 11, movable seat; 12, second hollow drive shaft; 13, movable limit block; 14, movable limit groove; 15, third drive shaft; 16, screw with handle; 17, gas cabinet; 18, piston; 19, mounting groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] See also Figure 1-4 The utility model provides the following technical solutions: an optical fiber level measuring instrument, comprising: an outer mounting seat 1, an inner mounting seat 3 is rotatably connected to the inner wall of the outer mounting seat 1, a rotation driving mechanism is installed between the inner mounting seat 3 and the outer mounting seat 1, an optical fiber displacement sensor 10 is fixedly connected to the inner mounting seat 3, the top and bottom ends of the optical fiber displacement sensor 10 extend to the upper and lower parts of the inner mounting seat 3 respectively, and the rotation driving mechanism and the optical fiber displacement sensor 10 are electrically connected to the gas tank control system.

[0023] Before the optical fiber level measuring instrument measures the inclination of the gas tank piston 18, during the balancing process of the gas tank piston 18, the gas tank control system (not shown) controls the rotation drive mechanism and the optical fiber displacement sensor 10 to start, the rotation drive mechanism drives the inner mounting seat 3 to rotate, the inner mounting seat 3 drives the optical fiber displacement sensor 10 to rotate, the optical fiber displacement sensor 10 measures the position data of the gas tank piston 18 and transmits it to the gas tank control system, and the gas tank control system displays the initial data of the positions of the gas tank piston 18;

[0024] See attached Figure 1 When the optical fiber level measuring instrument measures the inclination of the gas tank piston 18, the gas tank control system (not shown in the figure) controls the rotation drive mechanism and the optical fiber displacement sensor 10 to start, and the rotation drive mechanism drives the inner mounting seat 3 to rotate, and the inner mounting seat 3 drives the optical fiber displacement sensor 10 to rotate. The optical fiber displacement sensor 10 measures the position data of the gas tank piston 18 and transmits it to the gas tank control system. The gas tank control system displays the real-time data of each position of the gas tank piston 18 and compares it with the initial data. If there is a deviation, it is determined that the gas tank piston 18 is tilted and needs to be processed in time, so as to realize the inclination detection function of the gas tank piston 18 of the optical fiber level measuring instrument, that is, the level measurement function.

[0025] Specifically, the outer mounting seat 1 and the inner mounting seat 3 are rotatably connected via a bearing.

[0026] Specifically, the rotating drive mechanism includes a set motor 6, a mounting frame 5 fixedly connected to the top of the outer mounting seat 1, and an inner gear ring 9 fixedly connected to the inner wall of the inner mounting seat 3. The vertical section of the mounting frame 5 is connected to the third drive shaft 15 through a bearing, and the third drive shaft 15 is sleeved with a second hollow drive shaft 12 on the side close to the motor 6. The end of the second hollow drive shaft 12 close to the motor 6 is connected to the output end of the motor 6 through a coupling, and the end of the third drive shaft 15 away from the motor 6 is fixedly sleeved with a first conical wheel 7, and the horizontal section of the mounting frame 5 is connected to the first drive shaft 2 through a bearing, and the top of the first drive shaft 2 is fixedly sleeved with a second conical wheel 8 meshing with the first conical wheel 7, and the bottom end of the first drive shaft 2 is fixedly sleeved with a gear 4 meshing with the inner gear ring 9, and the motor 6 is electrically connected to the gas tank control system.

[0027] See attached Figure 1-2 The rotation drive mechanism controls the motor 6 to start through the gas tank control system, and the motor 6 drives the output end to rotate, and the output end of the motor 6 drives the second hollow drive shaft 12 to rotate, the second hollow drive shaft 12 drives the third drive shaft 15 to rotate, the third drive shaft 15 drives the first conical wheel 7 to rotate, the first conical wheel 7 drives the second conical wheel 8 to rotate, the second conical wheel 8 drives the first drive shaft 2 to rotate, the first drive shaft 2 drives the gear 4 to rotate, the gear 4 drives the inner gear ring 9 to rotate, and the inner gear ring 9 drives the inner mounting seat 3 to rotate, thereby realizing the rotation drive of the inner mounting seat 3.

[0028] Specifically, it also includes: a gas cabinet 17, a piston 18 is arranged inside the gas cabinet 17, a motor 6 is fixedly connected to the outer wall of the gas cabinet 17 above the piston 18 by bolts, an outer mounting seat 1 is fixedly connected to the gas cabinet 17 above the piston 18 by bolts, and an optical fiber of the optical fiber displacement sensor 10 penetrates the gas cabinet 17 and extends to the outside of the gas cabinet 17.

[0029] See attached Figure 3 The optical fiber level measuring instrument can realize the inclination detection function of the gas tank piston 18.

[0030] Embodiment 2

[0031] The difference between this embodiment and the first embodiment is that:

[0032] Specifically, an adjustment mechanism is installed between the third drive shaft 15 and the second hollow drive shaft 12, and the adjustment mechanism includes a screw rod 16 with a handle threadedly connected to the mounting frame 5 and located below the third drive shaft 15, two movable limit grooves 14 symmetrically opened on the third drive shaft 15 near the motor 6 side, two movable limit blocks 13 symmetrically fixed to the inner wall of the second hollow drive shaft 12 near the third drive shaft 15 side, and a movable seat 11 fixedly sleeved on the outer wall of the second hollow drive shaft 12, the handle of the screw rod 16 is close to the first conical wheel 7 side, the two movable limit blocks 13 extend to the two movable limit grooves 14 for movably connecting, and the movable seat 11 is connected to the screw rod 16 with a handle through a transmission nut.

[0033] See attached Figure 2 The adjusting mechanism drives the movable seat 11 to move toward or away from the motor 6 by rotating the handle screw 16 in the forward and reverse directions, and the movable seat 11 drives the second hollow drive shaft 12 to move in the same direction to realize the connection or disconnection function of the second hollow drive shaft 12 and the output end of the motor 6.

[0034] Specifically, a mounting groove 19 is formed on the inner wall of the gas cabinet body 17 above the piston 18 . The second hollow drive shaft 12 is located in the mounting groove 19 when extended and is separated from the mounting groove 19 when not extended.

[0035] See attached Figure 4 The second hollow drive shaft 12 moves toward or away from the motor 6, so that the second hollow drive shaft 12 is located in the installation groove 19 when extended and is detached from the installation groove 19 when not extended. It does not affect the rotation of the second hollow drive shaft 12 driven by the motor 6 during measurement, and is convenient for the disassembly and assembly of the optical fiber level measuring instrument during maintenance.

[0036] The motor 6 and the optical fiber displacement sensor 10 in the present invention are both conventional instruments, and their working principles, sizes and models are irrelevant to the functions of the present application, so they will not be described in detail. The control method of the present invention is controlled by a gas tank control system, and the control circuit of the gas tank control system can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field, and the present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical fiber level measuring instrument, characterized in that: include: An outer mounting seat (1), the inner wall of the outer mounting seat (1) is rotatably connected to an inner mounting seat (3), a rotation drive mechanism is arranged between the inner mounting seat (3) and the outer mounting seat (1), an optical fiber displacement sensor (10) is fixedly connected inside the inner mounting seat (3), the top and bottom ends of the optical fiber displacement sensor (10) extend above and below the inner mounting seat (3) respectively, and the rotation drive mechanism and the optical fiber displacement sensor (10) are electrically connected to a gas tank control system.

2. The optical fiber level measuring instrument according to claim 1, characterized in that: The outer mounting seat (1) and the inner mounting seat (3) are rotatably connected via a bearing.

3. The optical fiber level measuring instrument according to claim 1, characterized in that: The rotary drive mechanism comprises a motor (6), a mounting frame (5) fixedly connected to the top of the outer mounting seat (1), and an inner gear ring (9) fixedly connected to the inner wall of the inner mounting seat (3); the vertical section of the mounting frame (5) is connected to a third drive shaft (15) through a bearing; the side of the third drive shaft (15) close to the motor (6) is sleeved with a second hollow drive shaft (12); the end of the second hollow drive shaft (12) close to the motor (6) is connected to the output end of the motor (6) through a coupling; the end of the third drive shaft (15) away from the motor (6) is fixedly sleeved with a first conical wheel (7); the horizontal section of the mounting frame (5) is connected to a first drive shaft (2) through a bearing; the top of the first drive shaft (2) is fixedly sleeved with a second conical wheel (8) meshingly connected to the first conical wheel (7); the bottom of the first drive shaft (2) is fixedly sleeved with a gear (4) meshingly connected to the inner gear ring (9); and the motor (6) is electrically connected to a gas tank control system.

4. The optical fiber level measuring instrument according to claim 3, characterized in that: Also includes: A gas cabinet (17), wherein a piston (18) is arranged inside the gas cabinet (17), a motor (6) is fixedly connected to an outer wall of the gas cabinet (17) located above the piston (18) by means of bolts, an outer mounting seat (1) is fixedly connected to the gas cabinet (17) by means of bolts and located above the piston (18), and an optical fiber of the optical fiber displacement sensor (10) penetrates the gas cabinet (17) and extends to the outside of the gas cabinet (17).

5. The optical fiber level measuring instrument according to claim 3, characterized in that: An adjustment mechanism is arranged between the third drive shaft (15) and the second hollow drive shaft (12), the adjustment mechanism comprising a screw rod (16) with a handle which is threadedly connected to the mounting frame (5) and is located below the third drive shaft (15), two movable limiting grooves (14) symmetrically arranged on the third drive shaft (15) on the side close to the motor (6), two movable limiting blocks (13) symmetrically fixedly connected to the inner wall of the second hollow drive shaft (12) on the side close to the third drive shaft (15), and a movable seat (11) fixedly sleeved on the outer wall of the second hollow drive shaft (12), the handle of the screw rod (16) is close to the side of the first conical wheel (7), the two movable limiting blocks (13) extend into the two movable limiting grooves (14) and are movably connected, and the movable seat (11) is connected to the screw rod with a handle (16) through a transmission nut.

6. The optical fiber level measuring instrument according to claim 4, characterized in that: The inner wall of the gas cabinet (17) is provided with a mounting groove (19) above the piston (18); the second hollow drive shaft (12) is located in the mounting groove (19) when extended and is out of the mounting groove (19) when not extended.

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