A pull cord displacement sensor level measurement device

Abstract

The utility model discloses a sensor measuring device technical field's a kind of pull rope formula displacement sensor material level measuring device, including fixed frame, pull rope sensor and air cylinder, first slide rail is fixedly installed on the fixed frame, support column is fixedly installed on the fixed frame left side middle part, fixed plate is fixedly installed on the support column top, sensor base is installed on the fixed plate top, moving frame is installed on the first slide rail, second slide rail is fixedly installed in the moving frame inner bottom, moving plate is installed on the second slide rail, first spring is arranged in one end in the moving frame, vertical rod is fixedly installed on the moving plate top, rack is fixedly installed on the moving plate, gear rotation is through cooperation with rack, rack drives moving plate to move, moving plate drives vertical rod to move, the position of adjusting vertical rod, when pull rope sensor upper pull rope is fixed on vertical rod, there will be no angular deviation between pull rope and pull rope sensor.

Description

Technical Field

[0001] This utility model relates to the field of sensor measurement device technology, specifically a pull-rope type displacement sensor material level measurement device. Background Technology

[0002] A draw-wire sensor (also known as a draw-wire displacement sensor or draw-wire encoder) is a device that converts linear displacement into an electrical signal. It is widely used in industrial automation, engineering machinery, and medical equipment. Its core function is to accurately detect the linear displacement or positional change of an object by measuring the extension and retraction of the draw-wire. For example, in the draw-wire displacement sensor level measuring device disclosed in Chinese patent literature (application number: CN201620663857.6), the draw-wire is directly fixed to the zero-position screw via threaded holes, screws, and nuts, forming a rigid connection. The entire device lacks an angle compensation or adjustment mechanism to accommodate possible angular deviations. The parallel relationship between the draw-wire and the piston rod depends entirely on the initial installation accuracy and cannot be adjusted during use. Angular deviations cause a cosine error between the actual displacement of the draw-wire and the measured value. The larger the deviation angle, the non-linearly increasing the measurement error. Long-term angular deviations may cause uneven wear of the sensor's internal measuring elements. The lack of angle compensation can also cause the draw-wire to be unevenly arranged during winding, resulting in interlayer compression and scratching, shortening the draw-wire's service life.

[0003] Therefore, we propose a pull-rope type displacement sensor for material level measurement. Utility Model Content

[0004] The purpose of this invention is to provide a pull-rope type displacement sensor for measuring material level, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pull-rope type displacement sensor material level measuring device, comprising a fixing frame, a pull-rope sensor, and a cylinder; The first slide rail is fixedly installed on the fixed frame; A support column is fixedly installed on the middle left side of the fixed frame. The fixing plate is fixedly installed on the top of the support column; Sensor base, the sensor base is mounted on the top of the fixing plate; A movable frame is mounted on the first slide rail; The second slide rail is fixedly installed at the bottom of the movable frame; A movable plate is mounted on the second slide rail; A first spring is disposed at one end of the movable frame; The uprights are fixedly installed on the top of the movable plate; A rack is fixedly mounted on the movable plate; A gear, mounted on top of the rack; A drive shaft is fixedly connected to the left end of the gear. A retaining ring is fixedly connected to the left side surface of the movable frame; A sleeve, which is mounted on the drive shaft; A retaining ring is fixedly installed at the left end of the fixed ring; The first tooth is fixedly installed on the surface of the fixing ring; The second tooth is fixedly installed on the right end of the inner wall of the sleeve; A limiting groove is provided on the drive shaft; A limiting block is provided at the left end of the sleeve; The second spring is disposed inside the sleeve and is sleeved on the drive shaft.

[0006] Preferably, the fixing plate has mounting openings at both ends, an L-shaped fixing block is provided in the mounting opening, a bolt is provided at the bottom of the L-shaped fixing block, and a positioning ring is provided on the bolt.

[0007] Preferably, the bottom of the L-shaped fixing block is provided with a threaded hole that mates with a bolt.

[0008] Preferably, the drive shaft passes through the sleeve, the fixed ring, and the outer wall of the movable frame and is connected to the gear, and the drive shaft and the outer wall of the movable frame are connected by a bearing.

[0009] Preferably, the right end of the sleeve is connected to the fixed ring, and the sleeve and the fixed ring are movably connected.

[0010] Preferably, the first spring is provided in two sets, with the two sets of first springs respectively located on both sides of the second slide rail, and the two ends of the two sets of first springs respectively fixedly connected to the inner wall of the movable frame and one end of the movable plate.

[0011] Preferably, the second slide rail is trapezoidal, and the moving plate has a trapezoidal groove in the middle that cooperates with the second slide rail.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the sleeve drives the second tooth to move to the right and disengage from the first tooth, thereby loosening the sleeve's fixation to the transmission shaft. Rotating the sleeve, through the engagement of the limiting block and the limiting groove, drives the transmission shaft to rotate. The transmission shaft drives the gear to rotate, and the gear's rotation, through engagement with the rack, drives the moving plate to move. The moving plate then drives the upright to move, adjusting the position of the upright. After the upright position is adjusted, when the pull rope on the pull rope sensor is fixed to the upright, there will be no angular offset between the pull rope and the pull rope sensor. The linear motion of the pull rope maintains a linear relationship with the angle conversion of the rotary encoder, ensuring the pull rope angle does not deviate, making the measurement value more accurate. The friction between the pull rope and the guide wheel or housing of the pull rope sensor increases with the angle. Adjusting the angle can reduce the impact of friction on the sensor output. Reasonable adjustment of the pull rope angle can evenly distribute wear, extending the service life of the pull rope sensor. Simultaneously, it can prevent the pull rope from swaying due to mechanical vibration, thereby reducing signal noise. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the mobile frame of this utility model; Figure 3 This is a schematic diagram of the internal structure of the sleeve of this utility model; Figure 4 This is a schematic diagram of the sensor base fixing structure of this utility model; In the diagram: 1. Fixed frame; 2. First slide rail; 3. Support column; 4. Fixed plate; 5. Sensor base; 6. Pull rope sensor; 7. Cylinder; 8. Moving frame; 9. Second slide rail; 10. Moving plate; 101. Rack; 11. First spring; 12. Upright pole; 13. Gear; 14. Drive shaft; 15. Fixed ring; 16. Sleeve; 17. Retaining ring; 18. First tooth; 19. Second tooth; 20. Limiting groove; 21. Second spring; 22. Limiting block; 23. Mounting port; 24. L-shaped fixing block; 25. Bolt; 26. Positioning ring. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4This utility model provides a technical solution: a pull-rope displacement sensor material level measuring device, including a fixed frame 1, a pull-rope sensor 6, and a cylinder 7, a first slide rail 2, which is fixedly installed on the fixed frame 1, a support column 3, which is fixedly installed on the middle left side of the fixed frame 1, a fixed plate 4, which is fixedly installed on the top of the support column 3, a sensor base 5, which is installed on the top of the fixed plate 4, a movable frame 8, which is installed on the first slide rail 2, a second slide rail 9, which is fixedly installed at the bottom inside the movable frame 8, a movable plate 10, which is installed on the second slide rail 9, a first spring 11, which is disposed at one end inside the movable frame 8, a vertical rod 12, which is fixedly installed on the top of the movable plate 10, a rack 101, which is fixedly installed on the movable plate 10, a gear 13, which is installed on the top of the rack 101, and a drive shaft 14. 4. Fixed connection to the left end of gear 13, fixed ring 15, fixed ring 15 is fixedly connected to the left side surface of the moving frame 8, sleeve 16 is installed on the drive shaft 14, retaining ring 17 is fixedly installed on the left end of fixed ring 15, first tooth 18 is fixedly installed on the surface of fixed ring 15, second tooth 19 is fixedly installed on the right end of the inner wall of sleeve 16, limiting groove 20 is set on drive shaft 14, limiting block 22 is set on the left end of sleeve 16, second spring 21 is set inside sleeve 16 and sleeved on drive shaft 14, cylinder 7 pushes the moving frame 8 to move on the first slide rail 2 to push the material. During the pushing process, the pushing distance is measured by the pull rope sensor 6. This device is fixed to the place where the object to be pushed is to be welded, or fixed by opening holes in the fixed frame 1 and using bolts and nuts. After the pull rope sensor 6 is installed, its pull rope is fixed to the upright 12. To calibrate the pull rope sensor 6, push the sleeve 16 to the right. The sleeve 16 causes the second tooth 19 to move to the right, disengaging from the first tooth 18, thus releasing the sleeve 16 from its fixation to the drive shaft 14. Rotate the sleeve 16; the sleeve 16, through the engagement of the limiting block 22 and the limiting groove 20, drives the drive shaft 14 to rotate. The drive shaft 14 drives the gear 13 to rotate. The rotation of the gear 13, through its engagement with the rack 101, drives the rack 101 to move. The rack 101 drives the moving plate 10 to move, and the moving plate 10 drives the upright 12 to move. Adjust the position of the upright 12. After the position of the upright 12 is adjusted, release the sleeve 16; the spring pushes the sleeve 16 to move to the left. The second tooth 19 on the inner wall of the sleeve 16 engages with the first tooth 18 on the fixing ring 15, fixing the sleeve 16 and thus fixing the drive shaft 14. This ensures that when the pull rope on the pull rope sensor 6 is fixed to the upright 12, there will be no angular offset between the pull rope and the pull rope sensor 6. The linear motion of the pull rope and the angle conversion of the rotary encoder maintain a linear relationship, and the pull rope angle will not deviate, making the measurement value more accurate. The friction between the pull rope and the guide wheel or housing of the pull rope sensor 6 will increase with the increase of the angle. Adjusting the angle can reduce the impact of friction on the sensor output. Reasonable adjustment of the pull rope angle can evenly distribute wear, extend the service life of the pull rope sensor 6, and at the same time avoid the pull rope from swinging due to mechanical vibration, thereby reducing signal noise.

[0016] Reference embodiment: The fixing plate 4 has mounting ports 23 at both ends. An L-shaped fixing block 24 is provided in the mounting port 23. A bolt 25 is provided at the bottom of the L-shaped fixing block 24. A positioning ring 26 is provided on the bolt 25. A threaded hole that mates with the bolt 25 is provided at the bottom of the L-shaped fixing block 24. The bolt 25 passes through the positioning ring 36 and connects with the threaded hole on the L-shaped fixing block 24. When the bolt 25 is tightened, the L-shaped fixing block 24 presses down on the sensor base 5 to fix the pull rope sensor 6. The L-shaped fixing block 24 can move left and right in the mounting port 23, so that the L-shaped fixing block 24 can fix pull rope sensors 6 of different models and sizes on the fixing plate 4.

[0017] Reference embodiment: The drive shaft 14 passes through the sleeve 16, the fixed ring 15, the outer wall of the movable frame 8 and is connected to the gear 13. The drive shaft 14 and the outer wall of the movable frame 8 are connected by a bearing. The right end of the sleeve 16 is connected to the fixed ring 15. The sleeve 16 and the fixed ring 15 are movably connected. By rotating the sleeve 16, the sleeve 16 drives the drive shaft 14 to rotate, causing the gear 13 to rotate and adjusting the position of the upright 12.

[0018] Reference embodiment: Two sets of first springs 11 are provided. The two sets of first springs 11 are respectively provided on both sides of the second slide rail 9. The two ends of the two sets of first springs 11 are fixedly connected to the inner wall of the movable frame 8 and one end of the movable plate 10, respectively. The two sets of springs 11 push the movable plate 10 to eliminate the gap between the rack 101 and the gear 13 installed on the movable plate 10, so that the position adjustment of the upright 12 is more accurate.

[0019] Reference embodiment: The second slide rail 9 is set in a trapezoidal shape, and the middle of the moving plate 10 is provided with a trapezoidal groove that cooperates with the second slide rail 9. The second slide rail 9 fixes the moving plate 10, and the moving plate 10 moves on the second slide rail 9. The moving frame 8 and the first slide rail 2 are connected in the same way as the moving plate 10 and the second slide rail 9. The moving frame 8 moves on the first slide rail 2.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pull-rope type displacement sensor material level measuring device, characterized in that, Includes a mounting bracket (1), a pull rope sensor (6), and a cylinder (7); The first slide rail (2) is fixedly installed on the fixed frame (1); Support column (3) is fixedly installed on the middle left side of the fixed frame (1); Fixing plate (4) is fixedly installed on the top of the support column (3); Sensor base (5), sensor base (5) is mounted on top of the fixing plate (4); The movable frame (8) is mounted on the first slide rail (2); The second slide rail (9) is fixedly installed at the bottom of the movable frame (8); A movable plate (10) is mounted on the second slide rail (9); The first spring (11) is disposed at one end inside the movable frame (8); Upright pole (12) is fixedly installed on the top of the movable plate (10); A rack (101) is fixedly mounted on the movable plate (10); Gear (13), gear (13) is mounted on top of rack (101); Drive shaft (14) is fixedly connected to the left end of gear (13); A fixing ring (15) is fixedly connected to the left side surface of the movable frame (8); Sleeve (16) is mounted on the drive shaft (14); A retaining ring (17) is fixedly installed at the left end of the fixed ring (15); The first tooth (18) is fixedly installed on the surface of the fixing ring (15); The second tooth (19) is fixedly installed on the right end of the inner wall of the sleeve (16); A limiting groove (20) is provided on the drive shaft (14); A limiting block (22) is provided at the left end of the sleeve (16); The second spring (21) is disposed inside the sleeve (16) and is sleeved on the drive shaft (14).

2. The pull-rope type displacement sensor material level measuring device according to claim 1, characterized in that: The fixing plate (4) has mounting openings (23) at both ends. An L-shaped fixing block (24) is provided in the mounting opening (23). A bolt (25) is provided at the bottom of the L-shaped fixing block (24). A positioning ring (26) is provided on the bolt (25).

3. The pull-rope type displacement sensor material level measuring device according to claim 2, characterized in that: The bottom of the L-shaped fixing block (24) is provided with a threaded hole that mates with the bolt (25).

4. The pull-rope type displacement sensor material level measuring device according to claim 1, characterized in that: The drive shaft (14) passes through the sleeve (16), the fixed ring (15), the outer wall of the moving frame (8) and is connected to the gear (13). The drive shaft (14) and the outer wall of the moving frame (8) are connected by bearings.

5. The pull-rope type displacement sensor material level measuring device according to claim 1, characterized in that: The right end of the sleeve (16) is connected to the fixed ring (15), and the sleeve (16) and the fixed ring (15) are movably connected.

6. The pull-rope type displacement sensor material level measuring device according to claim 1, characterized in that: The first spring (11) is provided in two sets. The two sets of first springs (11) are respectively provided on both sides of the second slide rail (9). The two ends of the two sets of first springs (11) are respectively fixedly connected to the inner wall of the movable frame (8) and one end of the movable plate (10).

7. The pull-rope type displacement sensor material level measuring device according to claim 1, characterized in that: The second slide rail (9) is trapezoidal, and the moving plate (10) has a trapezoidal groove in the middle that cooperates with the second slide rail (9).

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