A screw-type gate positioner

Abstract

The utility model relates to a kind of screw gate position meter, including the travel gear meshed with the precision screw rod of screw gate, travel gear is rotatably installed in protective box by rotating shaft;Rotating shaft one end is rotatably connected with encoder, and rotating shaft other end is connected with driving member and is penetrated into drive box, driving member is connected with driving screw rod;Driving screw rod is connected with lifting block by screw thread, and driving box is opened with strip slot along the direction of lifting block movement, the lifting block is connected with pointer, and the driving box end surface outside strip slot is provided with indicating scale.The gate position meter is monitored by the double monitoring structure of encoder and mechanical pointer, complementary advantages are realized, encoder can satisfy the real-time data acquisition demand of automation system, and mechanical transmission mechanism, which is composed of driving member, driving screw rod and lifting block, can still be intuitively read gate opening through transparent metering shield, avoid data loss, and ensure the continuity of production process.

Description

Technical Field

[0001] This utility model relates to the field of gate position gauge technology, specifically a screw-type gate position gauge. Background Technology

[0002] A screw gate is a hydraulic engineering mechanical device that uses a threaded rod connected directly to the gate leaf, or via a guide slider or connecting rod. The gate is opened and closed by the up-and-down movement of the screw. The screw gate is manually or electrically driven to rotate the screw, causing the nut to move axially along the screw, thus raising and lowering the gate. The screw is self-locking, ensuring the gate remains stationary at any position without the need for additional braking devices. A screw-type gate position gauge is an instrument used to measure and display the opening degree of the screw-type gate; it operates through a travel gear that meshes with the thread on the gate screw of the screw gate. When the screw rises or falls, it drives the travel gear to rotate. The rotation of the gear is recorded to reflect the gate opening. Existing gate position gauges usually use encoders to record the rotation of the gears. However, in actual use, the inventors found that vibrations and shocks in industrial environments may cause the encoder shaft to shift or be falsely triggered, causing the readings to jump. Furthermore, the gate opening cannot be recorded after a power outage, resulting in data loss and affecting the continuity and stability of the production process. Dust and oil covering the encoder's optical components directly affect the signal acquisition accuracy. If the encoder itself has zero-point drift and there is no calibration mechanism, the accumulated error will become larger and larger, making it impossible to accurately reflect the dimensional rotation. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model provides a screw-type gate position gauge.

[0004] The technical solution of this utility model is as follows: A screw-type gate position gauge includes a stroke gear that meshes with a precision screw of a screw gate. The stroke gear is rotatably mounted in a protective box via a rotating shaft, and a portion of the stroke gear penetrates the protective box and meshes with the precision screw. An encoder is rotatably connected to one end of the rotating shaft, and a driving component is connected to the other end of the rotating shaft through the drive box. The driving component is connected to a driving screw and is rotatably connected to the top of the drive box in a vertical state. The drive screw is threadedly connected to a lifting block, and a slotted groove is provided in the drive box along the moving direction of the lifting block. The lifting block is connected to a pointer that passes through and moves up and down along the slotted groove. An indicator scale is provided on the end face of the drive box outside the slotted groove.

[0005] The drive component is specifically designed as follows: the drive component includes a driving bevel gear mounted on the rotating shaft, and a driven bevel gear meshing with the driving bevel gear is mounted at the bottom end of the drive screw.

[0006] In order to limit the lifting block and ensure that it slides in the vertical direction, a limit rod is installed at the top of the drive box on one side of the drive screw, which passes through the lifting block and the two are slidably set together.

[0007] In order to protect the travel gear and ensure that it can mesh with the precision screw, the travel gear extends out of the protective box by a maximum width of 1 / 5 to 1 / 3 of its outer diameter.

[0008] In order to limit the opening degree of the screw brake, two microswitches are arranged side by side on the inner wall of the drive box, and the trigger springs of the two microswitches are located at the top and bottom of the two switches respectively. The lifting block has two opposing ramps on the side near the micro switch, and the trigger springs of the two micro switches are respectively in contact with the two ramps, so that the two trigger springs can be pushed to move during the lifting block's lifting process.

[0009] In order to protect the drive box and prevent foreign objects from entering the slot, a metering cover is provided on the outside of the slot and installed with the drive box, and the end face of the metering cover opposite to the scale line is made transparent.

[0010] A limit switch is installed on the upper end of the protective box. The trigger arm of the limit switch passes through the protective box on the same side as the travel gear, and can push its trigger arm to move when the precision screw of the screw brake rises.

[0011] To facilitate the connection between the rotating shaft and the encoder, the encoder is located outside the protective housing, and the rotating shaft is connected to the encoder via a coupling.

[0012] To facilitate the installation of components such as the drive screw, a base plate is provided inside the drive box, and the base plate is located above the driven bevel gear. The drive screw passes through and is connected to the base plate via a flange bearing.

[0013] To facilitate the installation of the micro switch, a bracket is installed on the side of the micro switch where the trigger spring is located, and an adjusting screw is connected to the top of the drive box, which passes through the bracket and is threaded to it. A limiting plate is provided on the base plate, and a limiting groove is vertically opened on the limiting plate. A limiting bolt is slidably arranged through the limiting groove. The limiting bolt passes through the micro switch located above the trigger spring and the corresponding bracket.

[0014] The beneficial effects of this utility model are as follows: This utility model is a screw-type gate position gauge. Compared with the shortcomings of existing encoder-type gate position gauges, which are prone to reading jumps due to vibration and impact and data loss due to power failure, this gate position gauge achieves complementary advantages through a dual monitoring structure of encoder and mechanical pointer. The encoder can meet the real-time data acquisition requirements of the automation system, while the mechanical transmission mechanism composed of the drive component, drive screw and lifting block can synchronously convert the rotation of the shaft into the up and down movement of the pointer along the indicated scale. Even in the event of power failure or encoder failure, the gate opening can still be read intuitively through the transparent metering cover, avoiding data loss and ensuring the continuity of the production process. In terms of environmental adaptability and data accuracy, the device forms a comprehensive guarantee through multiple protection and calibration designs. The protective housing isolates the travel gears and shaft from the external environment, preventing direct contact with dust and oil. The encoder is located outside the housing and connected via a coupling, reducing oil contamination of the encoder's optical components and resolving the signal acquisition accuracy degradation issue caused by contaminant accumulation in traditional encoders. Two microswitches inside the drive housing, working in conjunction with the lifting block ramp, can trigger when the gate opening reaches its limit, providing overtravel protection and preventing equipment overload damage. Furthermore, the design of the adjusting screw and limit bolt allows for independent adjustment of the upper microswitch's installation height and position. Combined with the travel switch's monitoring of the precision screw's upward limit, this forms a multi-dimensional calibration mechanism, effectively correcting zero-point drift after long-term encoder use, preventing cumulative error expansion, and ensuring accurate and reliable gate opening data. Attached Figure Description

[0015] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0016] In the attached diagram: Figure 1 This is a diagram of the overall structure of the solution (first-person perspective); Figure 2 This is the overall structural diagram of the solution (second view); Figure 3 This is a partial cross-sectional view of the scheme; Figure 4 This is a partial structural view of the solution; Figure 5 This is a schematic diagram of the interior of the drive box; The components represented by the various reference numerals in the diagram are: 1. Stroke gear; 2. Shaft; 3. Protective box; 4. Encoder; 5. Drive box; 6. Driving bevel gear; 7. Driven bevel gear; 8. Drive screw; 9. Lifting block; 10. Strip groove; 11. Pointer; 12. Indicating scale; 13. Limit rod; 14. Micro switch; 15. Ramp; 16. Metering cover; 17. Limit switch; 18. Coupling; 19. Base plate; 20. Flange bearing; 21. Bracket; 22. Adjusting screw; 23. Limit plate; 24. Limit groove; 25. Limit bolt. Detailed Implementation

[0017] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0018] Example As mentioned in the background section, existing screw gate positioners typically use a separate encoder to record the number of rotations of the travel gear, which in turn reflects the movement length of the precision screw, thus determining the opening degree of the liquid level gate. However, in practical use, the inventors discovered certain shortcomings. Industrial environments commonly experience vibration and impact, and these external forces can easily cause the encoder shaft to shift or mis-trigger. Furthermore, in the event of a power outage, the encoder cannot continue recording the gate opening degree. Therefore, the inventors improved upon existing positioners, designing a novel screw-type positioner, which will be explained in detail below with reference to the illustrations.

[0019] This embodiment provides a screw-type gate position gauge. See [link to relevant documentation] Figures 1-3 This gate position gauge is specifically designed to work with the precision screw of a screw brake to accurately measure and display the opening degree of the screw brake. It solves the problems of traditional encoder-type gate position gauges being susceptible to vibration and shock, data loss during power outages, and the impact of dust and oil on accuracy and zero-point drift, ensuring the continuity and stability of industrial production processes. The gate position gauge mainly includes a stroke gear 1 that meshes with the precision screw of the screw brake. The connection between the stroke gear 1 and the existing screw brake is existing technology, and this solution does not involve any improvement to the connection scheme between the two, so it will not be elaborated further and will not affect the integrity of this solution. The stroke gear 1 is rotatably mounted in a protective box 3 via a rotating shaft 2. The protective box 3 can provide dustproof and oil-proof protection for the stroke gear 1, rotating shaft 2 and subsequent related components, preventing impurities in the industrial environment from directly adhering and affecting the operating accuracy of the components. The stroke gear 1 extends through the protective box 3 and meshes with the precision screw. To ensure meshing stability and prevent the stroke gear 1 from being excessively exposed and damaged by impact, the maximum width of the stroke gear 1 extending out of the protective box 3 is controlled to be 1 / 5 to 1 / 3 of its outer diameter. This ensures an effective meshing area with the precision screw while keeping the key meshing structure inside the protective box 3, thus improving the service life of the component.

[0020] In this embodiment, combined with Figure 3In the structural design of the protective box 3, a limit switch 17 is also installed at its upper end. This is an existing purchased part, and the specific model can be LXJM1-8104. The trigger arm of the limit switch 17 passes through the protective box 3 on the same side as the travel gear 1. When the precision screw of the screw brake rises to the preset limit position, the precision screw will push the trigger arm of the limit switch 17 to move, triggering the limit switch 17 to send a signal, thereby realizing the limit protection of the opening degree of the screw brake and preventing the precision screw from rising excessively and causing equipment damage. Meanwhile, an encoder 4 is rotatably connected to one end of the rotating shaft 2. The specific model can be ACT50-Z06-M0812-MB1. The encoder 4 is set outside the protective box 3, and the rotating shaft 2 is connected to the encoder 4 through a coupling 18. The coupling 18 can be model D25L30. The coupling 18 can effectively buffer the vibration transmission between the rotating shaft 2 and the encoder 4, avoid the vibration in the industrial field from causing the encoder 4 rotating shaft 2 to deviate or be falsely triggered, and reduce the problem of reading jumps. The encoder 4 is used to record the number of rotations of the rotating shaft 2, and then calculate the opening degree of the screw brake to realize the accurate acquisition and transmission of electronic signals.

[0021] Based on the above structure, the other end of the rotating shaft 2 extends into the drive box 5 and is connected to a drive component. The drive component is used to convert the rotational motion of the rotating shaft 2 into the rotational motion of the drive screw 8. Specifically, the drive component includes a driving bevel gear 6 fixedly installed at the end of the rotating shaft 2, and a driven bevel gear 7 that meshes with the driving bevel gear 6 is installed at the bottom of the drive screw 8. Through the vertical meshing of the driving bevel gear 6 and the driven bevel gear 7, the direction of the rotating shaft 2 from horizontal rotation to vertical rotation of the drive screw 8 is converted. The drive screw 8 is vertically connected to the top of the drive box 5. To improve the stability of the drive screw 8's rotation, a base plate 19 is provided inside the drive box 5. The drive box 5 also includes a side plate integrally formed from the base plate 19 for the installation and protection of components such as the drive screw 8. The base plate 19 is located above the driven bevel gear 7. The drive screw 8 passes through the base plate 19 and is connected to the base plate 19 through a flange bearing 20. The flange bearing 20 can support the middle part of the drive screw 8, preventing radial swaying of the drive screw 8 during rotation and ensuring the smooth movement of the subsequent lifting block 9.

[0022] In addition, combined Figure 4The drive screw 8 is threadedly connected to a lifting block 9. To prevent the lifting block 9 from rotating synchronously with the drive screw 8, a limit rod 13 is installed at the top of the drive box 5 on one side of the drive screw 8. The limit rod 13 passes through the lifting block 9 and the two are slidably set. The limit rod 13 can provide vertical guidance for the lifting block 9, so that the lifting block 9 can only move up and down along the axial direction of the drive screw 8, avoiding rotational deviation that affects the opening accuracy. A strip groove 10 is opened on the side wall of the drive box 5 along the moving direction of the lifting block 9. A pointer 11 is connected to the outside of the lifting block 9, passing through the strip groove 10 and moving up and down along the strip groove 10. An indicator scale 12 is set on the end face of the drive box 5 outside the strip groove 10. When the drive screw 8 rotates and drives the lifting block 9 to move up and down, the pointer 11 will move synchronously along the indicator scale 12. Through the scale value pointed to by the pointer 11, the operator can intuitively read the opening degree of the screw gate, so that the opening degree data can still be retained by the mechanical structure after power failure, avoiding the problem of data loss when power failure of the traditional encoder 4. To protect the indicator scale 12 and pointer 11 from dust and oil contamination, a measuring cover 16 is provided on the outside of the bar groove 10 and fixedly installed with the drive box 5. The end face of the measuring cover 16 opposite to the scale line is made of transparent material (such as acrylic sheet), which not only does not affect the staff to read the scale, but also effectively isolates external impurities and ensures that the scale is clearly visible.

[0023] In addition, combined Figure 5 Two microswitches 14 are arranged side-by-side on the inner wall of the drive box 5. These are purchased parts, and the specific model can be V-155-1C25. The trigger springs of the two microswitches 14 are staggered vertically. The lifting block 9 moves between the two trigger springs. On the side of the lifting block 9 closest to the microswitches 14, there are two opposing ramps 15, which contact the trigger springs of the two microswitches 14 respectively. When the lifting block 9 rises along the drive screw 8, the ramp 15 at its upper end gradually pushes the trigger spring of the upper microswitch 14, triggering the upper microswitch 14 to send a signal. When the lifting block 9 descends, the ramp 15 at its lower end pushes the trigger spring of the lower microswitch 14, triggering the lower microswitch 14. The two microswitches 14 correspond to the maximum and minimum opening degrees of the screw brake, respectively, forming a double limit protection with the limit switch 17 on the protective box 3, further improving the safety of equipment use.

[0024] To address the position adjustment requirements of the micro switch 14, a bracket 21 is installed on one side of the micro switch 14 with the trigger spring located above. An adjusting screw 22 is connected to the top of the drive box 5. The adjusting screw 22 passes through the bracket 21 and is threadedly connected to it. By rotating the adjusting screw 22, the bracket 21 and the micro switch 14 above can be moved up and down, thereby achieving fine adjustment of the trigger position of the micro switch 14 above. At the same time, a limit plate 23 is provided on the base plate 19. The limit plate 23 has a vertically formed limit groove 24. A limit bolt 25 is slidably set through the limit groove 24. The limit bolt 25 passes through the micro switch 14 with the trigger spring located above and the corresponding bracket 21. The cooperation between the limit groove 24 and the limit bolt 25 can provide guidance for the movement of the bracket 21, ensuring that the micro switch 14 always maintains the correct trigger direction during the fine adjustment process, and avoiding deviation that could lead to trigger failure.

Claims

1. A screw-type gate position gauge, comprising a stroke gear (1) meshing with a precision screw of a screw gate, characterized in that, The stroke gear (1) is rotatably installed in the protective box (3) via the rotating shaft (2), and part of the stroke gear (1) penetrates the protective box (3) and meshes with the precision screw; One end of the rotating shaft (2) is rotatably connected to an encoder (4), and the other end of the rotating shaft (2) passes through the drive box (5) and is connected to a drive component. The drive component is connected to a drive screw (8) and is rotatably connected to the top of the drive box (5) in a vertical state. The drive screw (8) is connected to a lifting block (9) by a thread, and the drive box (5) along the moving direction of the lifting block (9) is provided with a strip groove (10). The lifting block (9) is connected to a pointer (11) that passes through and moves up and down along the strip groove (10). The end face of the drive box (5) outside the strip groove (10) is provided with an indicator scale (12).

2. The screw-type gate position gauge according to claim 1, characterized in that, The driving component includes a driving bevel gear (6) mounted on the rotating shaft (2), and a driven bevel gear (7) meshing with the driving bevel gear (6) is mounted at the bottom end of the driving screw (8).

3. A screw-type gate position gauge according to claim 1, characterized in that, A limit rod (13) is installed at the top of the drive box (5) on one side of the drive screw (8), which passes through the lifting block (9) and the two are slidably arranged.

4. A screw-type gate position gauge according to claim 1, characterized in that, The maximum width of the travel gear (1) extending out of the protective box (3) is 1 / 5 to 1 / 3 of its outer diameter.

5. A screw-type gate position gauge according to claim 1, characterized in that, The inner wall of the drive box (5) is provided with two micro switches (14) arranged side by side, and the trigger springs of the two micro switches (14) are located at the top and bottom of the two switches respectively. The lifting block (9) has two opposing ramps (15) on the side near the micro switch (14), and the trigger springs of the two micro switches (14) are respectively in contact with the two ramps (15), so that the two trigger springs can be pushed to move during the lifting process of the lifting block (9).

6. A screw-type gate position gauge according to claim 1, characterized in that, The outer side of the strip groove (10) is provided with a metering cover (16) installed with the drive box (5), and the end face of the metering cover (16) opposite to the scale line is made transparent.

7. A screw-type gate position gauge according to claim 1, characterized in that, The upper end of the protective box (3) is equipped with a limit switch (17). The trigger arm of the limit switch (17) passes through the protective box (3) on the same side as the travel gear (1), and can push its trigger arm to move when the precision screw of the screw brake rises.

8. A screw-type gate position gauge according to claim 1, characterized in that, The encoder (4) is located outside the protective box (3), and the rotating shaft (2) is connected to the encoder (4) via a coupling (18).

9. A screw-type gate position gauge according to claim 5, characterized in that, The drive box (5) is provided with a base plate (19), and the base plate (19) is located above the driven bevel gear (7). The drive screw (8) passes through and is connected to the base plate (19) through a flange bearing (20).

10. A screw-type gate position gauge according to claim 9, characterized in that, A bracket (21) is installed on one side of the micro switch (14) above the trigger spring, and an adjusting screw (22) is connected to the top of the drive box (5), which passes through the bracket (21) and is threaded to it; A limiting plate (23) is provided on the base plate (19), and a limiting groove (24) is vertically opened on the limiting plate (23). A limiting bolt (25) is slidably provided through the limiting groove (24). The limiting bolt (25) passes through the micro switch (14) located above the trigger spring and the corresponding bracket (21).

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