A pressure gauge error calibration device

Abstract

This invention discloses a pressure gauge error calibration device, relating to the technical field of pressure gauge production equipment. It includes: a workbench and a conveyor mounted on top of the workbench, with multiple pressure gauges transported on the top of the conveyor; a vision inspection frame fixedly connected to the top of the workbench; a robotic arm fixedly connected to the top of the workbench; and an auxiliary calibrator located on top of the workbench for calibrating the errors of the pressure gauges. This invention, by incorporating an auxiliary calibrator, automates the entire pressure gauge calibration process, eliminating the need for manual intervention. After calibration, the drive motor reverses, tightening the nut via an adjusting block to ensure the adjusting bolt is securely positioned, thus completing the pressure gauge error calibration. This automated process effectively avoids human error deviations, significantly improving the efficiency and accuracy of pressure gauge testing and calibration.

Description

Technical Field

[0001] This invention relates to the field of pressure instrument manufacturing equipment technology, specifically a pressure instrument error calibration device. Background Technology

[0002] Pressure gauges are core components used in industrial production, metrology and testing to monitor fluid pressure. Their measurement accuracy directly affects the stability of production processes, the pass rate of product quality, and the safety of equipment operation. Therefore, pressure gauges must be calibrated for error before leaving the factory or during periodic calibration to ensure that their pointer indication accuracy meets industry standards and usage requirements.

[0003] Currently, the error calibration of existing pressure instruments mostly adopts manual or semi-automatic calibration modes. During the calibration process, core operations such as positioning and fixing the pressure instrument, loosening and tightening the nuts, adjusting the position of the connecting rod, and visually judging the pointer accuracy must be performed manually. Specifically, the operator needs to manually fix the pressure instrument in the calibration position, manually tighten the nuts with tools to release the fixing constraint between the adjusting bolt and the sector tooth, then manually pull the connecting rod to adjust the pointer position, and finally manually tighten the nuts to fix it after calibration. The entire process relies on the operator's experience and skill.

[0004] With the large-scale development of industrial production, the demand for pressure instruments has increased significantly, and the need for batch calibration is becoming increasingly urgent. Existing calibration methods are no longer suitable for the pace of industrial mass production. Meanwhile, manual operation is prone to problems such as positioning deviations, uneven tightening and loosening of nuts, insufficient linkage adjustment accuracy, and pointer judgment errors. This not only leads to low calibration efficiency but also results in poor consistency of calibration accuracy, making it difficult to meet the calibration requirements of high-precision pressure instruments. Furthermore, long-term repetitive manual operation increases the labor intensity of operators and raises the risk of instrument damage due to human error. Therefore, this invention provides a pressure instrument error calibration device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a pressure instrument error calibration device to address the problem that existing pressure instrument calibration methods rely on manual intervention, which can easily lead to alignment deviations when manually positioning pressure instruments and reduce the overall production efficiency of pressure instruments.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pressure gauge error calibration device, comprising: a workbench and a conveyor mounted on the top of the workbench, wherein a plurality of pressure gauges are conveyed on the top of the conveyor; a vision inspection frame fixedly connected to the top of the workbench; a robotic arm fixedly connected to the top of the workbench; and an auxiliary calibrator located on the top of the workbench for calibrating the error of the pressure gauges.

[0007] As a further embodiment of the present invention: the pressure gauge includes a connector disposed on the top of the conveyor, a connecting pipe fixedly connected to the air inlet of the connector, a Bourdon tube fixedly connected to the air outlet of the connector, a pointer rod and a rotating shaft rotatably connected to the top of the connector, an adjusting gear fixedly connected to the outer wall of the pointer rod, a sector tooth fixedly connected to the outer wall of the rotating shaft, and the adjusting gear meshing with the sector tooth, an adjusting groove extending to the bottom is formed at the top of the sector tooth, an adjusting bolt is slidably connected to the inner side of the adjusting groove, the adjusting bolt is fixedly connected to the sector tooth by a nut, and a connecting rod is hinged between the adjusting bolt and the Bourdon tube.

[0008] As a further embodiment of the present invention: the auxiliary calibrator includes multiple sets of baffles fixedly connected to the top of the conveyor, each set of baffles having two baffles, and each pair of baffles being attached to both sides of the joint. Two second electric push rods are fixedly connected to the top of the workbench, each second electric push rod being located on one side of the pressure gauge. An auxiliary plate is fixedly connected to the output end of the second electric push rod, and a tightening auxiliary component for tightening or loosening the nut is provided on one side of the auxiliary plate.

[0009] As a further embodiment of the present invention: the tensioning auxiliary assembly includes a connecting plate fixedly connected to one side of one of the auxiliary plates, a first electric push rod installed at the bottom of the connecting plate, the output end of the first electric push rod extending through to the top of the connecting plate and fixedly connected to a connecting frame, a piston cylinder arranged above the connecting frame, an adjusting block rotatably connected to the inner side of the piston cylinder, a spur gear ring fixedly connected to the outer wall of the adjusting block, a spur gear meshing on one side of the spur gear ring, a drive motor installed at the bottom of the piston cylinder, the output end of the drive motor extending through to the top of the piston cylinder and fixedly connected to the spur gear, and a calibration adjustment unit arranged at the top of the piston cylinder.

[0010] As a further embodiment of the present invention: the tensioning auxiliary component further includes a movable sleeve disposed on the top of the connecting frame, and the piston cylinder is slidably connected to the inner side of the movable sleeve. A connecting spring is installed between the piston cylinder and the movable sleeve, and a plurality of adjusting springs are installed between the connecting frame and the movable sleeve. The plurality of adjusting springs are distributed at equal distances around the outer wall of the movable sleeve.

[0011] As a further embodiment of the present invention: the calibration and adjustment unit includes multiple uprights fixedly connected to the top of the piston cylinder, the multiple uprights being equidistantly distributed around the top of the piston cylinder, each upright having a push rod slidably connected to its inner side, one end of the push rod extending through to the outside of the upright, and a power spring installed between the upright and the push rod.

[0012] As a further embodiment of the present invention: the calibration and adjustment unit further includes a plurality of trapezoidal blocks fixedly connected to the outer wall of the movable sleeve, each trapezoidal block being disposed on one side of one of the top rods.

[0013] As a further embodiment of the present invention: the end of the top rod is provided with a sphere, and the inner side of the trapezoidal block is provided with two inclined surfaces, and the inclined surfaces are located below the sphere.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up an auxiliary calibrator, the entire process of pressure instrument calibration is automated and requires no manual intervention. It can automatically complete the entire process of precise positioning and fixing of connectors, loosening and tightening of nuts, adjustment of bolt displacement, and precise calibration of pointers, effectively avoiding deviations from manual operation and significantly improving the efficiency and accuracy of pressure instrument calibration. 2. By setting up a calibration and adjustment unit, when misalignment occurs between the inner groove of the adjustment block and the nut, the coordinated adaptive action of the moving sleeve, trapezoidal block, top rod, power spring, and connecting spring can automatically complete the alignment adjustment and precise docking without manual intervention. This not only solves the docking failure caused by misalignment, but also ensures the stability and accuracy of the alignment adjustment through the smooth contact between the spherical surface and the inclined surface and the coordinated force of multiple components, greatly improving the docking fault tolerance of the tensioning auxiliary components and the overall practicality of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the top structure of the workbench of the present invention; Figure 3 This is a schematic diagram of the pressure gauge structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a side view of the pressure gauge of the present invention; Figure 6 This is a partial structural diagram of the pressure gauge of the present invention; Figure 7 This is a schematic diagram of the top structure of the connecting frame of the present invention; Figure 8 This is a cross-sectional view of the piston cylinder of the present invention.

[0016] In the diagram: 1. Workbench; 2. Vision inspection frame; 3. Robot arm; 4. Conveyor; 5. Pressure gauge; 6. Connector; 7. Connecting pipe; 8. Baffle; 9. Linkage rod; 10. Bourdon tube; 11. Connecting plate; 12. First electric push rod; 13. Connecting frame; 14. Second electric push rod; 15. Sector gear; 16. Rotating shaft; 17. Adjusting groove; 18. Adjusting bolt; 19. Nut; 20. Moving sleeve; 21. Piston cylinder; 22. Power spring; 23. Connecting spring; 24. Spur gear ring; 25. Pointer rod; 26. Adjusting gear; 27. Stand; 28. Adjusting spring; 29. ​​Adjusting block; 30. Drive motor; 31. Trapezoidal block; 32. Spur gear; 33. Push rod; 34. Auxiliary plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0019] Please see Figures 1 to 8This embodiment provides a pressure gauge error calibration device, including: a workbench 1 and a conveyor 4 installed on the top of the workbench 1, with multiple pressure gauges 5 conveyed on the top of the conveyor 4; a vision inspection frame 2, fixedly connected to the top of the workbench 1; a robotic arm 3, fixedly connected to the top of the workbench 1; and an auxiliary calibrator, located on the top of the workbench 1, used to calibrate the errors of the pressure gauges 5. Each pressure gauge 5 includes a connector 6 located on the top of the conveyor 4, with a connecting pipe 7 fixedly connected to the air inlet of the connector 6. A Bourdon tube 10 is fixedly connected to the air outlet of connector 6. A pointer rod 25 and a rotating shaft 16 are rotatably connected to the top of connector 6. An adjusting gear 26 is fixedly connected to the outer wall of the pointer rod 25, and a sector tooth 15 is fixedly connected to the outer wall of the rotating shaft 16. The adjusting gear 26 and the sector tooth 15 are meshed. An adjusting groove 17 extending from the top to the bottom of the sector tooth 15 is provided. An adjusting bolt 18 is slidably connected to the inner side of the adjusting groove 17. The adjusting bolt 18 is fixedly connected to the sector tooth 15 by a nut 19. The adjusting bolt 18 is hinged to the Bourdon tube 10. The connecting rod 9 and the auxiliary calibrator include multiple sets of baffles 8 fixedly connected to the top of the conveyor 4. Each set of baffles 8 has two baffles, and each pair of baffles 8 is attached to one side of the connector 6. Two second electric push rods 14 are fixedly connected to the top of the workbench 1. Each second electric push rod 14 is located on one side of the pressure gauge 5. An auxiliary plate 34 is fixedly connected to the output end of the second electric push rod 14. A tightening and loosening auxiliary assembly for tightening and loosening the nut 19 is provided on one side of the auxiliary plate 34. The tightening and loosening auxiliary assembly includes a connecting rod fixedly connected to one side of one of the auxiliary plates 34. A connecting plate 11 is provided. A first electric push rod 12 is installed at the bottom of the connecting plate 11. The output end of the first electric push rod 12 extends through to the top of the connecting plate 11 and is fixedly connected to a connecting frame 13. A piston cylinder 21 is provided above the connecting frame 13. An adjusting block 29 is rotatably connected to the inner side of the piston cylinder 21. A spur gear ring 24 is fixedly connected to the outer wall of the adjusting block 29. A spur gear 32 meshes with one side of the spur gear ring 24. A drive motor 30 is installed at the bottom of the piston cylinder 21. The output end of the drive motor 30 extends through to the top of the piston cylinder 21 and is fixedly connected to the spur gear 32. The conveyor 4 is composed of components such as a conveyor belt and conveyor rollers. Since it is existing technology, it is not described in detail in this solution. The baffle 8 is fixed on the conveyor belt of the conveyor 4 and is used to limit the joint 6. First, an air inlet pipe is installed on the top of the workbench 1 on one side of the connecting pipe 7 for docking with the connecting pipe 7. The air inlet pipe can be riveted and docked with the connecting pipe 7, and a sealing ring is installed on the outer wall of the air inlet pipe to seal it with the connecting pipe 7. This is used to fill the Bourdon tube 10 with the pressure gas for testing. The air inlet pipe is driven by a power component such as a linear module or a hydraulic cylinder. It is mainly used to dock the air inlet pipe with the connecting pipe 7, so that the pressure gauge 5 to be tested is moved to a position directly below the vision inspection frame 2. After docking with the air inlet pipe through the connecting pipe 7, a certain amount of pressurized gas enters the Bourdon tube 10, causing the Bourdon tube 10 to bend. This causes the connecting rod 9 to push the sector tooth 15 to rotate, which in turn drives the pointer rod 25 to rotate. When the pointer on the pointer rod 25 points to a constant position, a picture is taken by the camera inside the vision inspection frame 2. No calibration is required when the pointer points to the designated position. This solution only involves labeling and showing some parts of pressure gauge 5 in the attached drawings. Since pressure gauge 5 is existing technology, not all parts are fully represented. The inner side of the adjusting block 29 has a groove that matches the nut 19. It is not exactly the same size as the nut 19, but larger than the diameter of the nut 19. However, during the rotation of the adjusting block 29, the nut 19 will be rotated by the groove. The depth of the groove is greater than the thickness of the nut 19. How the robotic arm 3 clamps the link 9 and adjusts its position is existing technology, so it is not elaborated on in this solution. When pressure gauge 5 needs calibration, the two second electric actuators 14 are activated. The output ends of the two second electric actuators 14 respectively drive an auxiliary plate 34 to abut against the end of connector 6, thereby fixing connector 6. When connecting pipe 7 stops moving, piston cylinder 21 moves to below nut 19. Then, the first electric actuator 12 is activated. The output end of the first electric actuator 12 drives connecting bracket 13 to move upward, thereby aligning adjusting block 29 with nut 19 and making adjusting block 29 fit against the outer wall of nut 19. Then, drive motor 30 is activated. The output end of drive motor 30 drives spur gear 32 to rotate, which in turn drives spur gear ring 24 to rotate adjusting block 29, thereby rotating nut 19 through the inner groove of adjusting block 29. This prevents the adjusting bolt 18 from being fixed to the sector tooth 15. Subsequently, the robotic arm 3 grips the connecting rod 9 and pulls it to adjust the position of the adjusting bolt 18 inside the adjusting groove 17. This changes the driving radius of the connecting rod 9, thereby changing the driving radius of the sector tooth 15 and adjusting the position of the pointer 25. This achieves the calibration adjustment purpose. After the calibration adjustment is completed, the output end of the drive motor 30 rotates in the opposite direction, which causes the adjusting block 29 to rotate the nut 19, tightening the nut 19 and fixing the adjusting bolt 18 in the correct position. This achieves the calibration of the error of the pressure instrument 5 without the need for manual operation by the staff, thus improving the efficiency of the pressure instrument 5 testing and calibration.

[0020] Please see Figures 1 to 8 The piston cylinder 21 is equipped with a calibration adjustment unit at its top. The tensioning auxiliary assembly also includes a movable sleeve 20 mounted on the top of the connecting frame 13, with the piston cylinder 21 slidably connected to the inner side of the movable sleeve 20. A connecting spring 23 is installed between the piston cylinder 21 and the movable sleeve 20. Multiple adjusting springs 28 are installed between the connecting frame 13 and the movable sleeve 20, and the multiple adjusting springs 28 are evenly distributed around the outer wall of the movable sleeve 20. The calibration adjustment unit includes multiple supports 27 fixedly connected to the top of the piston cylinder 21. Multiple supports 27 are evenly distributed around the top of the piston cylinder 21. Each support 27 is slidably connected to a push rod 33 on its inner side. One end of the push rod 33 extends through to the outside of the support 27. A power spring 22 is installed between the support 27 and the push rod 33. The calibration and adjustment unit also includes multiple trapezoidal blocks 31 fixedly connected to the outer wall of the movable sleeve 20. Each trapezoidal block 31 is set on one side of a push rod 33. The end of the push rod 33 is provided with a ball. The inner side of the trapezoidal block 31 is provided with two inclined surfaces, and the inclined surfaces are located below the ball. When the piston cylinder 21 moves upward, the inner groove of the adjusting block 29 misaligns with the nut 19, causing the piston cylinder 21 to experience resistance. This causes the moving sleeve 20 to slide relative to the outer wall of the piston cylinder 21. As the moving sleeve 20 continues to move upward, the inner inclined surface of the trapezoidal block 31 contacts the spherical end of the push rod 33, pushing the power spring 22 towards the nut 19. With multiple power springs 22 moving towards the nut 19, the push rod 33, which initially contacts the nut 19, experiences resistance, thus pushing the moving sleeve 20 in the opposite direction. The position is adjusted so that the inner groove of the adjusting block 29 can be aligned with the nut 19 under the continuous adjustment of the position of the moving sleeve 20. Then, under the reset action of the connecting spring 23, the adjusting block 29 can dock with the nut 19 without manual intervention. This solves the docking failure caused by misalignment between the adjusting block 29 and the nut 19. Furthermore, the smooth contact between the spherical surface and the inclined surface, and the coordinated force of multiple components, ensure the stability and accuracy of the alignment adjustment, greatly improve the fault tolerance rate of the tensioning auxiliary components, and thus improve the overall practicality of the device. When the movable sleeve 20 stops compressing, the push rod 33 separates from the trapezoidal block 31. At this time, after the nut 19 is loosened, the front end of the robot arm 3 holds the connecting rod 9 and pulls the connecting rod 9 to adjust the position. During this process, the nut 19 will drive the movable sleeve 20 to change position, so that the nut 19 is always located inside the adjusting block 29, which is convenient for subsequent tightening operations.

[0021] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pressure gauge error calibration device, characterized in that, include: A workbench (1) and a conveyor (4) mounted on top of the workbench (1), the top of which carries multiple pressure gauges (5). A visual inspection frame (2) is fixedly connected to the top of the workbench (1); A robotic arm (3) is fixedly connected to the top of the workbench (1); An auxiliary calibrator, located on top of the workbench (1), is used to calibrate the error of the pressure gauge (5).

2. The pressure gauge error calibration device according to claim 1, characterized in that, The pressure gauge (5) includes a connector (6) located on the top of the conveyor (4). A connecting pipe (7) is fixedly connected to the air inlet of the connector (6), and a Bourdon tube (10) is fixedly connected to the air outlet of the connector (6). A pointer rod (25) and a rotating shaft (16) are rotatably connected to the top of the connector (6). An adjusting gear (26) is fixedly connected to the outer wall of the pointer rod (25), and a sector tooth (15) is fixedly connected to the outer wall of the rotating shaft (16). The adjusting gear (26) meshes with the sector tooth (15). An adjusting groove (17) is provided on the top of the sector tooth (15). An adjusting bolt (18) is slidably connected to the inner side of the adjusting groove (17). The adjusting bolt (18) is fixedly connected to the sector tooth (15) by a nut (19). A connecting rod (9) is hinged between the adjusting bolt (18) and the Bourdon tube (10).

3. The pressure gauge error calibration device according to claim 2, characterized in that, The auxiliary calibrator includes multiple sets of baffles (8) fixedly connected to the top of the conveyor (4). Each set of baffles (8) has two baffles, and each pair of baffles (8) is attached to both sides of the connector (6). The top of the workbench (1) is fixedly connected to two second electric push rods (14). Each second electric push rod (14) is located on one side of the pressure gauge (5). The output end of the second electric push rod (14) is fixedly connected to an auxiliary plate (34). One side of the auxiliary plate (34) is provided with a tightening auxiliary component for tightening the nut (19).

4. The pressure gauge error calibration device according to claim 3, characterized in that, The tensioning auxiliary assembly includes a connecting plate (11) fixedly connected to one side of one of the auxiliary plates (34). A first electric push rod (12) is installed at the bottom of the connecting plate (11). The output end of the first electric push rod (12) extends through to the top of the connecting plate (11) and is fixedly connected to a connecting frame (13). A piston cylinder (21) is provided above the connecting frame (13). An adjusting block (29) is rotatably connected to the inner side of the piston cylinder (21). A spur gear ring (24) is fixedly connected to the outer wall of the adjusting block (29). A spur gear (32) meshes with one side of the spur gear ring (24). A drive motor (30) is installed at the bottom of the piston cylinder (21). The output end of the drive motor (30) extends through to the top of the piston cylinder (21) and is fixedly connected to the spur gear (32). A calibration adjustment unit is provided at the top of the piston cylinder (21).

5. A pressure gauge error calibration device according to claim 4, characterized in that, The tensioning auxiliary assembly also includes a movable sleeve (20) disposed on the top of the connecting frame (13), and the piston cylinder (21) is slidably connected to the inner side of the movable sleeve (20). A connecting spring (23) is installed between the piston cylinder (21) and the movable sleeve (20). A plurality of adjusting springs (28) are installed between the connecting frame (13) and the movable sleeve (20). The plurality of adjusting springs (28) are distributed at equal distances around the outer wall of the movable sleeve (20).

6. A pressure gauge error calibration device according to claim 5, characterized in that, The calibration and adjustment unit includes multiple supports (27) fixedly connected to the top of the piston cylinder (21). The multiple supports (27) are distributed at equal distances around the top of the piston cylinder (21). A push rod (33) is slidably connected to the inner side of each support (27). One end of the push rod (33) extends through to the outside of the support (27). A power spring (22) is installed between the support (27) and the push rod (33).

7. A pressure gauge error calibration device according to claim 6, characterized in that, The calibration adjustment unit also includes a plurality of trapezoidal blocks (31) fixedly connected to the outer wall of the movable sleeve (20), each trapezoidal block (31) being disposed on one side of a top rod (33).

8. A pressure gauge error calibration device according to claim 7, characterized in that, The top rod (33) has a sphere at its end, and the trapezoidal block (31) has two inclined surfaces on its inner side, with the inclined surfaces located below the sphere.

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