A calibration mechanism for a nitrogen spring pressure sensor

Abstract

This utility model relates to the field of nitrogen spring pressure sensor calibration technology, and discloses a calibration mechanism for a nitrogen spring pressure sensor, including a testing box. A solenoid valve and a standard pressure sensor are respectively provided on both sides of the testing box. A mounting base is rotatably connected to the top outer wall of the testing box. A driving component for rotating the mounting base is provided on the top of the testing box. A hexagonal groove is formed in the mounting base, and a replaceable hexagonal frame is slidably connected in the hexagonal groove. A fixing component is provided between the hexagonal frame and the mounting base to fix them together. Different hexagonal frames have the same outer diameter but different inner diameters. This utility model, through the provided mounting base and the detachable hexagonal frame, allows for the installation of different models of pressure sensors by selecting different models of hexagonal frames, thus increasing the applicability of the device.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen spring pressure sensor calibration technology, and more specifically to a calibration mechanism for a nitrogen spring pressure sensor. Background Technology

[0002] Nitrogen springs are devices that use high-pressure nitrogen gas to store and release energy to achieve elastic support or cushioning. They are widely used in the automotive industry, aerospace, medical devices, industrial machinery and furniture manufacturing. The internal air pressure directly determines the spring's output force, stroke stability and service life.

[0003] A search revealed Chinese patent CN218937640U, which discloses a calibration mechanism for a barometric pressure sensor. This device calibrates the barometric pressure sensor by comparing it with a standard barometric pressure sensor. The device also facilitates the connection and fixation of the barometric pressure sensor, improving work efficiency. However, when installing the barometric pressure sensor, it places it inside a rotating disk. The hexagonal slot inside the rotating disk is fixed, while the size of the hexagonal screws on the outside of the barometric pressure sensor varies depending on the model. Therefore, this device cannot properly install different models of barometric pressure sensors, resulting in low applicability. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a calibration mechanism for a nitrogen spring pressure sensor to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a calibration mechanism for a nitrogen spring pressure sensor, comprising a testing box, with a solenoid valve and a standard pressure sensor respectively provided on both sides of the testing box, a mounting base rotatably connected to the top outer wall of the testing box, a driving component for rotating the mounting base provided on the top of the testing box, a hexagonal groove provided in the mounting base, a replaceable hexagonal frame slidably connected in the hexagonal groove, a fixing component for fixing the hexagonal frame and the mounting base, different hexagonal frames having the same outer diameter but different inner diameters, and a threaded tube for installing the pressure sensor to be tested threaded through and detachable on the top inner wall of the testing box.

[0006] As a further embodiment of this utility model, the driving assembly includes an external gear ring fixedly connected to the outer circumferential wall of the mounting base, a U-shaped plate fixedly connected to the upper surface of the detection box and located on one side of the mounting base, a drive motor fixedly connected to the top outer wall of the U-shaped plate, and a gear that cooperates with the external gear ring fixedly connected to the output shaft of the drive motor through the top inner wall of the U-shaped plate.

[0007] As a further embodiment of this utility model, the fixing component includes two symmetrical clearance grooves formed on the upper surface of the mounting base, and a slot for cooperating with the two clearance grooves is formed on the upper surface of the hexagonal frame. A locking block is slidably connected in the slot and clearance groove on the same side.

[0008] As a further embodiment of this utility model, the card block is provided with a rotating hole, and a half screw is rotatably connected to the rotating hole. The half screw is located below the card block and is threaded. The bottom inner wall of the clearance groove is provided with a threaded hole that cooperates with the half screw.

[0009] As a further embodiment of this utility model, two symmetrical round rods are fixedly connected to the top outer wall of the detection box and located on both sides of the mounting base. Round tubes are slidably connected to the outer circumference of the round rods, and connecting frames for pressing the pressure sensor to be tested are fixedly connected to the top ends of the two round tubes.

[0010] As a further embodiment of this utility model, a circular hole is provided in the middle of the connecting frame, and an annular groove is provided on the inner circumference of the circular hole. A rotating ring is rotatably connected in the annular groove to avoid the top connector of the pressure sensor to be tested.

[0011] As a further embodiment of this utility model, a tension spring is fixedly connected between the bottom end of the circular tube and the outer circumferential wall of the bottom end of the circular rod.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. This utility model, with its mounting base and detachable hexagonal frame, allows for the installation of different pressure sensors by selecting different hexagonal frames, thus increasing the applicability of the device.

[0014] 2. This utility model, through the provided locking block and semi-screw, can fix the hexagonal frame to the mounting base after installation, preventing the hexagonal frame from shifting vertically during installation and affecting the installation of the pressure sensor to be measured.

[0015] 3. The present invention uses a rotating ring to avoid damaging the connector at the top of the pressure sensor under test, thereby preventing damage to the connector at the end during the testing process and thus damaging the pressure sensor under test. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front three-dimensional structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the rear three-dimensional structure of this utility model.

[0018] Figure 3 This utility model Figure 1 A schematic diagram of a localized explosion structure.

[0019] Figure 4 This utility model Figure 2 A partially enlarged structural diagram.

[0020] The attached diagram is labeled as follows: 1. Detection box; 2. Solenoid valve; 3. Standard air pressure sensor; 4. External gear ring; 5. Hexagonal frame; 6. U-shaped plate; 7. Drive motor; 8. Gear; 9. Round rod; 10. Round tube; 11. Connecting frame; 12. Tension spring; 13. Alternating groove; 14. Slot; 15. Block; 16. Rotating hole; 17. Threaded hole; 18. Round hole; 19. Annular groove; 20. Rotating ring; 21. Threaded tube; 22. Mounting base; 23. Half screw. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Reference Figures 1-4 This utility model provides a calibration mechanism for a nitrogen spring pressure sensor, including a test box 1. A solenoid valve 2 and a standard pressure sensor 3 are respectively provided on both sides of the test box 1. A mounting base 22 is rotatably connected to the top outer wall of the test box 1. A drive assembly for rotating the mounting base 22 is provided on the top of the test box 1. A hexagonal groove is opened inside the mounting base 22, and a replaceable hexagonal frame 5 is slidably connected inside the hexagonal groove. A fixing assembly is provided between the hexagonal frame 5 and the mounting base 22 to fix the two together. Different hexagonal frames 5 have the same outer diameter but different inner diameters. A threaded tube 21 for installing the pressure sensor to be tested is threaded through and detachable on the top inner wall of the test box 1. Both the standard pressure sensor 3 and the pressure sensor to be tested 3 are connected to an external measuring instrument.

[0023] Specifically, when calibrating and testing the pressure sensor to be tested, first select the hexagonal frame 5 of the hexagonal screw on the outside of the applicator, and then slide the selected hexagonal frame 5 into the hexagonal groove in the mounting base 22.

[0024] With the provided mounting base 22 and the detachable hexagonal frame 5 thereon, different models of hexagonal frames 5 can be selected to install different models of barometric pressure sensors, thus increasing the applicability of the device.

[0025] In this utility model, the fixing component includes two symmetrical clearance grooves 13 formed on the upper surface of the mounting base 22, and a slot 14 formed on the upper surface of the hexagonal frame 5 to cooperate with the two clearance grooves 13. A locking block 15 is slidably connected in the slot 14 and clearance groove 13 on the same side.

[0026] After the hexagonal frame 5 is installed, the two clips 15 are installed into the clearance groove 13 and the slot 14 through the half screws 23 on them, and the hexagonal frame 5 is locked and fixed.

[0027] The provided locking block 15 and half screw 23 can fix the hexagonal frame 5 to the mounting base 22 after installation, preventing the hexagonal frame 5 from shifting up and down during installation and affecting the installation of the pressure sensor to be measured.

[0028] In this utility model, the drive assembly includes an external gear ring 4 that is fixedly connected to the outer circumferential wall of the mounting base 22 by bolts, a U-shaped plate 6 that is fixedly connected to the upper surface of the detection box 1 and located on one side of the mounting base 22 by bolts, a drive motor 7 that is fixedly connected to the top outer wall of the U-shaped plate 6 by bolts, and a gear 8 that works with the external gear ring 4 that passes through the top inner wall of the U-shaped plate 6 by bolts.

[0029] The drive assembly rotates the sensor into the threaded tube 21. When using the drive assembly, the drive motor 7 is started first to drive the gear 8 at the end of the output shaft to rotate. During the rotation of the gear 8, the external gear ring 4 that meshes with it will rotate, which in turn drives the pressure sensor to be measured to rotate through the mounting base 22 and the hexagonal frame 5, so that the thread at its end rotates into the threaded tube 21 for installation.

[0030] In this utility model, a rotating hole 16 is provided on the card block 15, and a half screw 23 is rotatably connected to the rotating hole 16. The half screw 23 is located below the card block 15 and has a thread. The bottom inner wall of the clearance groove 13 has a threaded hole 17 that cooperates with the half screw 23.

[0031] Specifically, when calibrating and testing the pressure sensor to be tested, first select the hexagonal frame 5 with the hexagonal screw on the outside of the applicator, then slide the selected hexagonal frame 5 into the hexagonal groove in the mounting base 22. After the hexagonal frame 5 is installed, install the two locking blocks 15 into the clearance groove 13 and the locking groove 14 through the half screws 23 on them, and lock the hexagonal frame 5 in place.

[0032] In this utility model, two symmetrical round rods 9 are fixedly connected to the top outer wall of the detection box 1 and located on both sides of the mounting base 22 by bolts. A round tube 10 is slidably connected to the outer circumference of the round rod 9. The top ends of the two round tubes 10 are fixedly connected to a connecting frame 11 for pressing the pressure sensor to be tested by bolts. A tension spring 12 is welded between the bottom end of the round tube 10 and the outer circumference of the bottom end of the round rod 9.

[0033] Specifically, during the installation of the pressure sensor to be tested, it will slowly move downwards. At this time, the tension spring 12 applies tension and pulls the connecting bracket 11 downwards through the round tube 10, thereby squeezing the top of the pressure sensor to be tested.

[0034] In this utility model, a circular hole 18 is provided in the middle of the connecting frame 11, and an annular groove 19 is provided on the inner circumference of the circular hole 18. A rotating ring 20 is rotatably connected in the annular groove 19 to avoid the top connector of the pressure sensor to be tested.

[0035] The rotating ring 20 can be used to avoid damaging the connector at the top of the pressure sensor under test during the test, thus preventing damage to the pressure sensor under test.

[0036] After the pressure sensor under test is installed, the solenoid valve 2 can be opened to supply air to the test chamber 1 through the air pipe. The gas enters the standard pressure sensor 3 and the pressure sensor under test through the test chamber 1, which makes it convenient for the user to calibrate the pressure sensor under test.

[0037] It should be noted that the drive motor 7, solenoid valve 2 and standard air pressure sensor 3 are existing technologies, and those skilled in the art can set them according to actual needs, which will not be elaborated here.

[0038] It should be noted that: the inner wall of the threaded hole 17 is provided with an annular groove in the axial direction, and a nylon 66 damping ring with a Shore hardness of 85A is embedded in the groove. The continuous axial clamping force generated by its elastic deformation forms a helical angle interference fit with the surface of the half screw 23 at 15°-20°. When the threaded pair is subjected to axial vibration load, the nylon insert can generate a maximum elastic compression of 0.3mm, which increases the friction coefficient between the thread contact surfaces from 0.15 to 0.68 (tested according to ASTM D1894 standard), effectively suppressing loosening displacement caused by thread springback.

[0039] The use of this utility model involves the following steps:

[0040] S1: When calibrating and testing the pressure sensor to be tested, first select the hexagonal frame 5 with the hexagonal screw on the outside of the applicator, then slide the selected hexagonal frame 5 into the hexagonal groove in the mounting base 22. After the hexagonal frame 5 is installed, install the two locking blocks 15 into the clearance groove 13 and the locking groove 14 through the half screws 23 on them, and lock the hexagonal frame 5 in place.

[0041] S2: Then place the pressure sensor to be tested in the middle of the hexagonal frame 5, and use the drive assembly to rotate it into the threaded tube 21. When using the drive assembly, first start the drive motor 7 to drive the gear 8 at the end of the output shaft to rotate. During the rotation of the gear 8, it will drive the external gear ring 4 that meshes with it to rotate. Then, through the mounting base 22 and the hexagonal frame 5, the pressure sensor to be tested will rotate, so that the thread at its end will rotate into the threaded tube 21 for installation.

[0042] S3: During the installation of the pressure sensor to be tested, it will slowly move downward. At this time, the tension spring 12 applies tension and pulls the connecting bracket 11 downward through the round tube 10, thereby squeezing the top of the pressure sensor to be tested.

[0043] S4: After the pressure sensor under test is installed, connect it to the external measuring equipment. Then, open the solenoid valve 2 to supply air to the test chamber 1 through the air pipe. The gas enters the standard pressure sensor 3 and the pressure sensor under test through the test chamber 1 respectively, so as to facilitate the user to calibrate the pressure sensor under test.

[0044] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0045] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0046] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A calibration mechanism for a nitrogen spring pressure sensor, comprising a testing box (1), wherein a solenoid valve (2) and a standard pressure sensor (3) are respectively provided on both sides of the testing box (1), characterized in that: A mounting base (22) is rotatably connected to the top outer wall of the test box (1). The top of the test box (1) is provided with a drive assembly that rotates the mounting base (22). A hexagonal groove is provided in the mounting base (22). A replaceable hexagonal frame (5) is slidably connected in the hexagonal groove. A fixing assembly is provided between the hexagonal frame (5) and the mounting base (22) to fix the two. Different hexagonal frames (5) have the same outer diameter but different inner diameters. A threaded tube (21) for installing the pressure sensor to be tested is threadedly connected to the top inner wall of the test box (1).

2. The calibration mechanism for a nitrogen spring pressure sensor according to claim 1, characterized in that: The drive assembly includes an external gear ring (4) fixedly connected to the outer circumferential wall of the mounting base (22), a U-shaped plate (6) fixedly connected to the upper surface of the detection box (1) and located on one side of the mounting base (22), a drive motor (7) fixedly connected to the top outer wall of the U-shaped plate (6), and a gear (8) that cooperates with the external gear ring (4) fixedly connected to the output shaft of the drive motor (7) through the top inner wall of the U-shaped plate (6).

3. The calibration mechanism for a nitrogen spring pressure sensor according to claim 1, characterized in that: The fixing component includes two symmetrical clearance slots (13) on the upper surface of the mounting base (22). The upper surface of the hexagonal frame (5) is provided with a slot (14) that cooperates with the two clearance slots (13). A locking block (15) is slidably connected in the slot (14) and clearance slot (13) on the same side.

4. The calibration mechanism for a nitrogen spring pressure sensor according to claim 3, characterized in that: The card block (15) has a rotating hole (16) and a half screw (23) is rotatably connected to the rotating hole (16). The half screw (23) is located below the card block (15) and has a thread. The bottom inner wall of the clearance groove (13) has a threaded hole (17) that works with the half screw (23).

5. The calibration mechanism for a nitrogen spring pressure sensor according to claim 2, characterized in that: Two symmetrical round rods (9) are fixedly connected to the top outer wall of the detection box (1) and on both sides of the mounting base (22). A round tube (10) is slidably connected to the outer circumference of the round rod (9). A connecting frame (11) for pressing the pressure sensor to be tested is fixedly connected to the top of the two round tubes (10).

6. The calibration mechanism for a nitrogen spring pressure sensor according to claim 5, characterized in that: A circular hole (18) is provided in the middle of the connecting frame (11), and an annular groove (19) is provided on the inner circumference of the circular hole (18). A rotating ring (20) for avoiding the top connector of the pressure sensor to be tested is rotatably connected in the annular groove (19).

7. The calibration mechanism for a nitrogen spring pressure sensor according to claim 5, characterized in that: A tension spring (12) is fixedly connected between the bottom end of the round tube (10) and the outer circumference of the bottom end of the round rod (9).

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