Device for calibrating pressure of material under high pressure

Abstract

The utility model relates to the technical field of mechanical measuring instruments, in particular to a device for calibrating pressure of a material under high pressure, which comprises a rack, the rack comprises a rigid base, a mounting rack is arranged on the top surface of the rigid base, a pressure device is slidably mounted in the mounting rack, and a driving device is arranged on the top surface of the mounting rack. The driving device is arranged, the adjusting motor drives the worm to rotate through the bevel gear, the worm can drive the transmission shaft to conduct transmission through the worm gear, so that the adjusting lead screw is driven to rotate, the rigid frame is driven to move through the lead screw sleeve, and due to the self-locking characteristic of the worm gear and the worm, the adjusting lead screw cannot drive the worm gear to rotate; therefore, the rigid frame is prevented from moving upwards due to counter-acting force, and the stability of force loading is ensured; the pressure device is arranged, the piston rod of the pressure applying oil cylinder is controlled to extend or retract, the pressure applied to the material is increased or reduced, the oil pressure of the oil inlet of the pressure applying oil cylinder is controlled, and the loaded force value can be accurately controlled in cooperation with the tension and pressure sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical measuring instruments, in particular to a device for calibrating the pressure of materials under high pressure. Background Art

[0002] Pressure sensors are devices or apparatuses that can sense pressure signals and convert them into electrical signals for output according to certain rules. They are a common type of sensor and are widely used in various fields. However, due to various factors, the measurement results of pressure sensors often have errors, which will affect the accuracy and reliability of the sensor. Therefore, it is necessary to calibrate the sensor to determine the various parameters of the sensor so as to compensate for the sensor error.

[0003] The multifunctional loading device and six-dimensional force sensor calibration method disclosed in authorization number CN103323175B use the rotation of the screw to achieve the vertical movement of the sliding beam to ensure the loading accuracy in the Z direction, use a planetary reducer and a bevel gear reducer with a large transmission ratio to ensure the accuracy during the force loading process, use a circular plate type tension and pressure sensor to detect the force value, and use a clamping sleeve to fix the height of the sliding beam.

[0004] Under low pressure values, the use of expansion sleeves for fixing, combined with the self-locking ability of the lead screw itself, can ensure that the crossbeam will not move during force loading. However, under high pressure conditions, the load that the expansion sleeve can bear is limited. Considering the transmission accuracy, the self-locking ability of the lead screw is also relatively limited. At this time, the crossbeam will move in the direction opposite to the force loading direction, thereby affecting the accuracy of force value loading, and the upper limit of the force value is not high. Utility Model Content

[0005] In order to make up for the problem of insufficient loading accuracy of the traditional calibration device structure under high pressure conditions, the utility model provides a device for calibrating the pressure of materials under high pressure.

[0006] The technical solution of the utility model is:

[0007] A device for calibrating pressure of materials under high pressure, comprising:

[0008] A frame, wherein the frame comprises a rigid base, a tension and pressure sensor is provided in the middle of the top surface of the rigid base, a display is provided on the front side of the rigid base, the display is connected to the tension and pressure sensor through a wire, the tension and pressure sensor is used to measure the pressure exerted on the material, a mounting frame is provided on the top surface of the rigid base, a pressure device is slidably installed inside the mounting frame, and a driving device is provided on the top surface of the mounting frame;

[0009] The pressure device comprises a rigid frame, both ends of the rigid frame are connected with adjusting screws through screw sleeves, the adjusting screws are connected to the driving device, a pressure cylinder is provided in the middle of the top surface of the rigid frame, and the piston rod of the pressure cylinder penetrates the rigid frame and extends downward;

[0010] The driving device includes an adjusting motor, the output shaft of the adjusting motor is connected to a worm gear through a gear transmission device, the worm gear transmission device is connected to the adjusting screw, the adjusting motor can drive the adjusting screw to rotate through the gear transmission device and the worm gear transmission device, and the worm gear transmission device is used to achieve self-locking of the adjusting screw.

[0011] Preferably, the mounting frame includes four columns, a limiting beam is provided in the middle of two columns on the same side, a top plate is provided on the top surface of the column, the pressure device is located above the limiting beam, and the driving device is located above the top plate.

[0012] Preferably, four guide sleeves are provided at both ends of the rigid frame, the guide sleeves are slidably connected to the columns, and the bottoms of the guide sleeves are lower than the bottom surface of the rigid frame.

[0013] Preferably, the bottom end of the adjusting screw is rotatably connected to a screw bracket, and the screw bracket is fixedly installed in the middle part of the side surface of the limiting beam.

[0014] Preferably, the gear transmission device includes a gear frame, the adjusting motor is fixedly mounted on the top surface of the gear frame, and the output shaft of the adjusting motor passes through the top of the gear frame and is connected to a bevel gear assembly.

[0015] Preferably, the worm gear transmission device includes two worms, and one end of the worm close to the adjusting motor passes through the gear rack and is fixedly connected to the bevel gear assembly.

[0016] Preferably, the worm is connected to a worm wheel, and the worm wheel is rotatably mounted on the top surface of the top plate through a thrust bearing. A transmission shaft is fixedly mounted in the middle of the worm wheel, and the transmission shaft passes through the thrust bearing and the top plate and is fixedly connected to the adjusting screw.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model sets a driving device, and the adjusting motor drives the worm to rotate by the bevel gear. The worm can drive the transmission shaft through the worm wheel, thereby driving the adjusting screw to rotate, and then driving the rigid frame to move through the screw sleeve. Due to the self-locking characteristics of the worm wheel, the adjusting screw cannot drive the worm wheel to rotate, thereby ensuring that the rigid frame will not move upward due to the reaction force, and ensuring the stability of the force loading;

[0019] 2. The utility model increases or decreases the pressure applied to the material by setting a pressure device and controlling the extension or retraction of the piston rod of the pressure cylinder. The loaded force value can be accurately controlled by controlling the oil pressure at the oil inlet of the pressure cylinder in conjunction with a tension pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the frame and the pressure device in the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the pressure device and the driving device in the utility model;

[0023] Figure 4 It is a schematic diagram of the structure of the driving device in the utility model.

[0024] The meaning of each number in the figure is:

[0025] 1. Frame; 11. Rigid base; 12. Tension and pressure sensor; 13. Column; 14. Limit beam; 15. Top plate; 16. Display;

[0026] 2. Pressure device; 21. Rigid frame; 22. Reinforcement beam; 23. Guide sleeve; 24. Screw sleeve; 25. Pressure cylinder; 26. Adjusting screw; 27. Screw bracket.

[0027] 3. Driving device; 31. Adjusting motor; 32. Gear rack; 33. Bevel gear assembly; 34. Worm; 35. Worm bracket; 36. Worm wheel; 37. Thrust bearing; 38. Transmission shaft. DETAILED DESCRIPTION

[0028] 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.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] Embodiment 1:

[0031] See also Figure 1-4 The utility model describes the above technical solution in detail through the following embodiments:

[0032] A device for calibrating pressure of materials under high pressure, comprising:

[0033] The frame 1 includes a rigid base 11, a tension and pressure sensor 12 is provided in the middle of the top surface of the rigid base 11, a display 16 is provided on the front side of the rigid base 11, the display 16 is connected to the tension and pressure sensor 12 through a wire, the tension and pressure sensor 12 is used to measure the pressure exerted on the material, a mounting frame is provided on the top surface of the rigid base 11, a pressure device 2 is slidably installed inside the mounting frame, and a driving device 3 is provided on the top surface of the mounting frame.

[0034] The rigid base 11 is made of metal and can avoid deformation under high pressure. The tension and pressure sensor 12 is fixedly installed at the geometric center of the top surface of the rigid base 11 by bolts. The tension and pressure sensor 12 is a through-type tension and pressure sensor that can withstand high pressure.

[0035] The data detected by the tension pressure sensor 12 can be transmitted to the display 16 through the wire, and the display 16 can display the pressure value to facilitate the experimenter to record and observe.

[0036] The mounting frame includes four columns 13 , wherein a limiting beam 14 is disposed in the middle of two columns 13 on the same side, a top plate 15 is disposed on the top surface of the columns 13 , the pressure device 2 is located above the limiting beam 14 , and the driving device 3 is located above the top plate 15 .

[0037] The column 13 is fixedly mounted on the top surface of the rigid base 11 by bolts, and the column 13 is a solid steel column. The limit beam 14 is slidably connected to the column 13 by an expansion sleeve. The top plate 15 is fixedly mounted on the top of the column 13 by bolts.

[0038] The pressure device 2 includes a rigid frame 21, both ends of which are connected to adjusting screws 26 through screw sleeves 24, the adjusting screw 26 is connected to the driving device 3, and a pressure cylinder 25 is provided in the middle of the top surface of the rigid frame 21, and the piston rod of the pressure cylinder 25 penetrates the rigid frame 21 and extends downward.

[0039] Reinforcement beams 22 are welded on the front and rear sides of the top surface of the rigid frame 21. The reinforcement beams 22 can prevent the rigid frame 21 from bending under high pressure conditions. The upper limit of the pressure that the rigid frame 21 can withstand is increased. The screw sleeve 24 is threadedly connected to the adjusting screw 26. The adjusting screw 26 adopts a trapezoidal screw, which has a certain self-locking ability. The screw sleeve 24 is fixedly connected to the rigid frame 21 by bolts. The cylinder body of the pressure cylinder 25 is fixedly installed on the top surface of the rigid frame 21 by bolts, and the piston rod of the pressure cylinder 25 passes through the geometric center of the rigid frame 21. The axis of the pressure cylinder 25 coincides with the axis of the tension pressure sensor 12.

[0040] Four guide sleeves 23 are provided at both ends of the rigid frame 21 . The guide sleeves 23 are slidably connected to the columns 13 , and the bottoms of the guide sleeves 23 are lower than the bottom surface of the rigid frame 21 .

[0041] The guide sleeve 23 is welded to the rigid frame 21. The bottom of the guide sleeve 23 is lower than the bottom surface of the rigid frame 21. This can prevent the rigid frame 21 from directly contacting the limiting cross beam 14.

[0042] The bottom end of the adjusting screw 26 is rotatably connected to a screw bracket 27 , and the screw bracket 27 is fixedly installed in the middle of the side surface of the limiting beam 14 .

[0043] The bottom end of the adjusting screw 26 is connected to the head of the screw support 27 by a bearing, and the screw support 27 is fixedly connected to the limiting cross beam 14 by a bolt. The screw support 27 can ensure that the adjusting screw 26 rotates so that no deflection occurs.

[0044] When the adjusting screw 26 rotates, the screw sleeve 24 can drive the rigid frame 21 to move up and down, thereby driving the guide sleeve 23 to slide up and down along the column 13, thereby ensuring that the rigid frame 21 remains horizontal when moving.

[0045] The driving device 3 includes an adjusting motor 31, the output shaft of the adjusting motor 31 is connected to a worm gear drive via a gear transmission device, the worm gear drive is connected to the adjusting screw 26, the adjusting motor 31 can drive the adjusting screw 26 to rotate via the gear transmission device and the worm gear drive device, and the worm gear drive device is used to achieve self-locking of the adjusting screw 26.

[0046] The regulating motor 31 is a servo motor, and the regulating motor 31 can accurately control the number of rotations and the rotation angle of the output shaft.

[0047] The gear transmission device includes a gear frame 32 , and the adjusting motor 31 is fixedly mounted on the top surface of the gear frame 32 . The output shaft of the adjusting motor 31 passes through the top of the gear frame 32 and is connected to a bevel gear assembly 33 .

[0048] The gear frame 32 is fixedly mounted on the top center of the top plate 15 by bolts, and the adjustment motor 31 is fixedly mounted on the top center of the gear frame 32 by bolts, and the output shaft of the adjustment motor 31 passes through the top center of the gear frame 32 downward.

[0049] The bevel gear assembly 33 includes three identical bevel gears, two of which are parallel to each other, and the third bevel gear meshes with the other two bevel gears at the same time. The output shaft of the adjustment motor 31 is engaged with the third bevel gear. When the adjustment motor 31 is working, the output shaft of the adjustment motor 31 can drive the third bevel gear to rotate, thereby driving the other two bevel gears to rotate. The two parallel bevel gears rotate at the same speed and in opposite directions.

[0050] The worm gear transmission device includes two worms 34 . One end of the worm 34 close to the regulating motor 31 passes through the gear frame 32 and is fixedly connected to the bevel gear assembly 33 .

[0051] The worm 34 is rotatably mounted on the top surface of the top plate 15 through a worm bracket 35. The end of the worm 34 close to the adjusting motor 31 passes through the gear rack 32 and is engaged with the parallel bevel gear. The output shaft of the adjusting motor 31 can drive the worm 34 to rotate through the bevel gear assembly 33.

[0052] The worm 34 is connected to a worm wheel 36 , which is rotatably mounted on the top surface of the top plate 15 via a thrust bearing 37 . A transmission shaft 38 is fixedly mounted in the middle of the worm wheel 36 . The transmission shaft 38 passes through the thrust bearing 37 and the top plate 15 and is fixedly connected to the adjusting screw 26 .

[0053] The worm wheel 36 is engaged with the transmission shaft 38, and the transmission shaft 38 is fixedly connected to the adjusting screw 26 via a coupling. When the worm 34 rotates, the transmission shaft 38 can be driven to rotate by the worm wheel 36, thereby driving the adjusting screw 26 to rotate. Due to the self-locking characteristics between the worm wheel 36 and the worm 34, when the adjusting screw 26 has a tendency to rotate by itself under the action of external force, the worm wheel 36 cannot be driven to rotate by the transmission shaft 38, thereby achieving self-locking of the adjusting screw 26, thereby achieving the fixation of the position of the rigid frame 21.

[0054] When the operator of this embodiment uses this device, he controls the piston rod of the pressure cylinder 25 to retract and starts the adjustment motor 31 at the same time. The output shaft of the adjustment motor 31 drives the worm 34 to rotate through the bevel gear assembly 33. The rotation of the worm 34 can drive the transmission shaft 38 to rotate through the worm wheel 36, thereby driving the adjustment screw 26 to rotate. Then, the rigid frame 21 is driven to rise through the screw sleeve 24 until the distance between the bottom surface of the piston rod of the pressure cylinder 25 and the top surface of the tension pressure sensor 12 meets the experimental requirements, and the adjustment motor 31 is stopped.

[0055] The material to be calibrated is placed in the center of the top surface of the tension and pressure sensor 12. The pressure sensor 12 detects the downward pressure generated by the material's own mass, and the data detected by the pressure sensor 12 is transmitted to the display 16 through a wire, and the detected data is displayed by the display 16, and the value of the tension and pressure sensor 12 at this time is recorded.

[0056] Start the adjusting motor 31, drive the worm 34 to rotate through the bevel gear assembly 33, thereby drive the worm wheel 36 to rotate, and then drive the adjusting screw 26 to rotate through the transmission shaft 38, and then drive the rigid frame 21 to descend through the screw sleeve 24 until the bottom surface of the piston rod of the pressure cylinder 25 contacts the material surface.

[0057] The piston rod of the pressure cylinder 25 is driven to extend. At this time, the pressure applied by the piston rod of the pressure cylinder 25 on the material is equal to the oil pressure of the pressure cylinder 25. By controlling the oil pressure of the pressure cylinder 25, the pressure on the material can be controlled. By calculating the difference between the pressure value of the tension pressure sensor 12 and the initial value, the actual pressure on the material can be obtained, so as to adjust the oil pressure of the pressure cylinder 25 to ensure the accuracy of the force value loading and realize the calibration of the material pressure value. By gradually increasing the oil pressure of the pressure cylinder 25, the dynamic calibration of the material pressure can be realized.

[0058] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A device for calibrating the pressure of materials under high pressure, characterized in that: include: A frame (1), the frame (1) comprising a rigid base (11), a tension and pressure sensor (12) being provided in the middle of the top surface of the rigid base (11), a display (16) being provided on the front side of the rigid base (11), the display (16) being connected to the tension and pressure sensor (12) via a wire, the tension and pressure sensor (12) being used to measure the pressure exerted on a material, a mounting frame being provided on the top surface of the rigid base (11), a pressure device (2) being slidably mounted inside the mounting frame, and a driving device (3) being provided on the top surface of the mounting frame; The pressure device (2) comprises a rigid frame (21), both ends of the rigid frame (21) are connected to adjusting screws (26) via screw sleeves (24), the adjusting screws (26) are connected to the driving device (3), a pressure cylinder (25) is provided in the middle of the top surface of the rigid frame (21), and the piston rod of the pressure cylinder (25) penetrates the rigid frame (21) and extends downward; The driving device (3) comprises an adjusting motor (31), the output shaft of the adjusting motor (31) being connected to a worm gear transmission device via a gear transmission device, the worm gear transmission device being connected to an adjusting screw (26), the adjusting motor (31) being able to drive the adjusting screw (26) to rotate via the gear transmission device and the worm gear transmission device, the worm gear transmission device being used to realize self-locking of the adjusting screw (26).

2. A device for calibrating pressure of materials under high pressure as claimed in claim 1, characterized in that: The mounting frame comprises four columns (13), two columns (13) on the same side are provided with a limiting cross beam (14) in the middle, the top surface of the column (13) is provided with a top plate (15), the pressure device (2) is located above the limiting cross beam (14), and the driving device (3) is located above the top plate (15).

3. A device for calibrating pressure of materials under high pressure as claimed in claim 2, characterized in that: Four guide sleeves (23) are provided at both ends of the rigid frame (21), the guide sleeves (23) are slidably connected to the columns (13), and the bottom of the guide sleeves (23) is lower than the bottom surface of the rigid frame (21).

4. A device for calibrating pressure of materials under high pressure as claimed in claim 3, characterized in that: The bottom end of the adjusting screw (26) is rotatably connected to a screw support (27), and the screw support (27) is fixedly mounted on the middle part of the side of the limiting cross beam (14).

5. The device for calibrating pressure of materials under high pressure as claimed in claim 2, characterized in that: The gear transmission device comprises a gear frame (32), the regulating motor (31) is fixedly mounted on the top surface of the gear frame (32), and the output shaft of the regulating motor (31) passes through the top of the gear frame (32) and is connected to a bevel gear assembly (33).

6. A device for calibrating pressure of materials under high pressure as claimed in claim 5, characterized in that: The worm gear transmission device comprises two worms (34), and one end of the worm (34) close to the regulating motor (31) passes through the gear rack (32) and is fixedly connected to the bevel gear assembly (33).

7. A device for calibrating pressure of materials under high pressure as claimed in claim 6, characterized in that: The worm (34) is connected to a worm wheel (36), and the worm wheel (36) is rotatably mounted on the top surface of the top plate (15) through a thrust bearing (37). A transmission shaft (38) is fixedly mounted in the middle of the worm wheel (36), and the transmission shaft (38) passes through the thrust bearing (37) and the top plate (15) and is fixedly connected to the adjusting screw (26).

Images