Pointer type differential pressure gauge calibration device

Abstract

The utility model discloses a pointer type micro differential pressure gauge calibration device, and relates to the technical field of instrument calibration, the pointer type micro differential pressure gauge calibration device is provided with a calibration cylinder, a piston assembly, a movable rod and an electric push rod, so that the electric push rod can drive the piston assembly to move randomly in the calibration cylinder; the calibration cylinder is connected with the micro differential pressure gauge body, the position of the pointer body can be clearly seen in the moving process of the piston assembly, friction between parts can be reduced through the piston assembly, abrasion of the piston assembly and the calibration cylinder is further reduced, the sealing effect is better, the calibration cylinder is integrally connected with the micro differential pressure gauge body, and the sealing effect is better. The installation and disassembly operations of the calibration device are reduced, the movement of the pointer body can be observed more visually, whether the device leaks air or not can be observed in time, and the calibration device is very convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of instrument calibration, in particular to a pointer-type micro-differential pressure gauge calibration device. Background Art

[0002] At present, pointer-type micro-differential pressure gauges are usually used in the medical and health industry. They can be used to measure pressure differences in pharmaceutical factories, clean workshops, HVAC, etc. Before using the pointer-type micro-differential pressure gauge, a calibration device is generally required to calibrate the pointer position in the differential pressure gauge to avoid measurement errors due to pointer deviation during subsequent detection.

[0003] For example, the utility model with patent number CN202120329038.9 discloses a pointer-type micro-differential pressure gauge calibration device, including a substrate, and a shell, a pressure equalizing mechanism, a diaphragm box, a screw and a driving mechanism arranged on the substrate; the shell is provided with an air guide hole, the air guide hole is connected and conducted with the input end of the pressure equalizing mechanism, and the two output ends of the pressure equalizing mechanism are respectively connected with the standard device connection port and the calibrated meter connection port; the diaphragm box is arranged in the shell, the interior of the diaphragm box is connected and conducted with the air guide hole, and the exterior of the diaphragm box is connected with the screw; the driving mechanism is connected with the screw, and the driving mechanism is used to drive the screw to translate, and the translation of the screw is used to drive the diaphragm box to produce a pressure difference change; therefore, the pressure change will be transmitted to the pressure-sensitive elements of the pointer-type micro-differential pressure gauge and the standard device at the same time through the pressure equalizing mechanism, thereby causing the indication of the pointer-type micro-differential pressure gauge and the standard device to change at the same time, greatly improving the calibration efficiency of the pointer-type micro-differential pressure gauge, reducing the uncertainty of the indication error calibration result, and effectively solving the problem of large calibration error of the existing pointer-type micro-differential pressure gauge;

[0004] The calibration device in this patent realizes the calibration of the differential pressure gauge by driving the screw rod to translate through a driving mechanism. Over time, it is easy for the various components to wear to varying degrees, and the sealing effect of the device is affected, resulting in deviations in the pointer even after the calibration is completed, and precise adjustment cannot be achieved. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a pointer-type micro-differential pressure gauge calibration device, which solves the problem that the device is prone to wear and tear and cannot achieve precise adjustment.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a pointer-type micro-differential pressure gauge calibration device, comprising a mounting plate, a micro-differential pressure gauge body is fixedly mounted on the upper end of the mounting plate, a calibration cylinder is fixedly connected to the outside of the micro-differential pressure gauge body, a pointer body is arranged on the surface of the micro-differential pressure gauge body, a piston assembly is installed inside the calibration cylinder, a movable rod is connected to the outside of the piston assembly, a fixed block is fixedly mounted on the end of the movable rod, a bracket is fixedly mounted on the upper end of the fixed block, a boss is arranged on the upper end of the calibration cylinder, an electric push rod is fixedly mounted on the upper end of the boss, a connecting rod is arranged on the movable end of the electric push rod, and the end of the connecting rod is fixedly mounted on the surface of the bracket, a standard instrument connection port is arranged on one side of the calibration cylinder, and a calibrated meter connection port is arranged on the other side of the calibration cylinder.

[0007] Preferably, a standard instrument connecting pipe is detachably mounted on the outside of the standard instrument connecting port, and a calibrated meter connecting pipe is detachably mounted on the outside of the calibrated meter connecting port.

[0008] Furthermore, a silicone sealing hose is provided on the connecting pipe of the standard instrument and the connecting pipe of the meter to be calibrated, and the caliber of the silicone sealing hose is smaller than the caliber of the connecting pipe of the standard instrument and the connecting pipe of the meter to be calibrated.

[0009] Preferably, the piston assembly comprises a piston body, a surface of the piston body is provided with grooves, and the outside of the piston body is provided with evenly distributed positioning blocks.

[0010] Furthermore, a first sealing gasket is arranged on the outer surface of the piston body, and a second sealing gasket is arranged outside the first sealing gasket.

[0011] Preferably, a sealing ring is provided on the inner side of the fixing block, and the sealing ring is attached to the surface of the movable rod.

[0012] Preferably, an extension sleeve is provided at the end of the calibration cylinder, and a retaining ring is provided on the surface of the extension sleeve. Beneficial Effects

[0013] The utility model provides a pointer-type micro differential pressure gauge calibration device. Compared with the prior art, it has the following beneficial effects:

[0014] The pointer-type micro-differential pressure gauge calibration device is provided with a calibration cylinder, a piston assembly, a movable rod and an electric push rod, so that the electric push rod can drive the piston assembly to move arbitrarily inside the calibration cylinder. The calibration cylinder and the micro-differential pressure gauge body are connected to each other, and the position of the pointer body can be clearly seen during the movement of the piston assembly. The piston assembly can reduce the friction between the parts, further reduce the wear of the piston assembly and the calibration cylinder, and the sealing effect is better. The integral connection between the calibration cylinder and the micro-differential pressure gauge body not only reduces the installation and disassembly operations of the calibration device, but also allows for more intuitive observation of the movement of the pointer body, and timely observation of whether the device has air leakage. It is very portable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the mounting frame in the utility model.

[0017] Figure 3 It is a structural schematic diagram of the piston assembly in the utility model.

[0018] In the figure: 1. mounting plate; 2. micro differential pressure gauge body; 3. calibration cylinder; 301. extension sleeve; 302. retaining ring; 4. pointer body; 5. standard instrument connection port; 6. standard instrument connection pipe; 7. calibrated gauge connection port; 8. calibrated gauge connection pipe; 9. silicone sealing hose; 10. piston assembly; 1001. piston body; 1002. groove; 1003. positioning block; 1004. first sealing gasket; 1005. second sealing gasket; 11. movable rod; 12. fixed block; 1201. sealing ring; 13. bracket; 14. boss; 15. electric push rod; 16. connecting rod. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-3The utility model provides a technical solution: a pointer-type micro differential pressure gauge calibration device, including a mounting plate 1, a micro differential pressure gauge body 2 is fixedly mounted on the upper end of the mounting plate 1, a calibration cylinder 3 is fixedly connected to the outside of the micro differential pressure gauge body 2, a pointer body 4 is arranged on the surface of the micro differential pressure gauge body 2, a piston assembly 10 is installed inside the calibration cylinder 3, a movable rod 11 is connected to the outside of the piston assembly 10, a fixed block 12 is fixedly mounted on the end of the movable rod 11, a bracket 13 is fixedly mounted on the upper end of the fixed block 12, a boss 14 is arranged on the upper end of the calibration cylinder 3, an electric push rod 15 is fixedly mounted on the upper end of the boss 14, and the electric push rod 15 is fixedly mounted on the upper end of the boss 14. The movable end of the rod 15 is provided with a connecting rod 16, and the end of the connecting rod 16 is fixedly installed on the surface of the bracket 13. The electric push rod 15 can push the bracket 13 to move, thereby driving the connecting rod 16 to move. The movement of the connecting rod 16 can drive the piston assembly 10 connected thereto to move, thereby changing the position of the piston assembly 10, adjusting the pressure difference inside the calibration cylinder 3, and further changing the position of the pointer body 4. A standard device connection port 5 is provided on one side of the calibration cylinder 3, and a calibrated meter connection port 7 is provided on the other side of the calibration cylinder 3. The standard device connection port 5 is used for an external standard device, and the calibrated meter connection port 7 is used for an external calibrated meter.

[0021] The standard instrument connection port 5 is detachably mounted with a standard instrument connection pipe 6 on the outside, and the calibrated meter connection port 7 is detachably mounted with a calibrated meter connection pipe 8 on the outside. Silicone sealing hoses 9 are arranged on the standard instrument connection pipe 6 and the calibrated meter connection pipe 8. The caliber of the silicone sealing hose 9 is smaller than that of the standard instrument connection pipe 6 and the calibrated meter connection pipe 8. By arranging the silicone sealing hose 9, the connection between the calibrated meter and the standard instrument and the corresponding connection pipes can be improved, and the sealing effect can be improved. The piston assembly 10 includes a piston body 1001, a groove 1002 is opened on the surface of the piston body 1001, and evenly distributed positioning blocks 1003 are arranged on the outside of the piston body 1001. The positioning blocks 1003 The moving position of the piston body 1001 can be limited. A first sealing gasket 1004 is arranged on the outer surface of the piston body 1001, and a second sealing gasket 1005 is arranged on the outer side of the first sealing gasket 1004. By arranging the first sealing gasket 1004 and the second sealing gasket 1005, the sealing between the piston body 1001 and the calibration cylinder 3 can be improved. A sealing ring 1201 is arranged on the inner side of the fixed block 12, and the sealing ring 1201 is attached to the surface of the movable rod 11. An extension sleeve 301 is arranged on the end of the calibration cylinder 3, and a retaining ring 302 is arranged on the surface of the extension sleeve 301. By arranging the retaining ring 302, the extension sleeve 301 and the micro-differential pressure gauge body 2 can be firmly fixed together.

[0022] When working, first place the device at the required position, then fix the mounting plate 1 with bolts. After fixing it, open the electric push rod 15 and observe the position of the pointer body 4. At this time, the electric push rod 15 pushes the bracket 13 to move, thereby driving the connecting rod 16 to move. During the movement, the connecting rod 16 drives the piston body 1001 to move, and the pressure difference inside the calibration cylinder 3 can be adjusted, thereby driving the pointer body 4 to rotate. When the pointer body 4 moves to the optimal position, close the electric push rod 15. The device is connected to the micro-differential pressure gauge body 2 through the calibration cylinder 3, which not only reduces the installation and disassembly operations of the calibration device, but also can more intuitively observe the movement of the pointer body 4, and can timely observe whether the device has air leakage. It is very portable to use.

[0023] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A pointer-type micro differential pressure gauge calibration device, comprising a mounting plate (1), characterized in that: A micro differential pressure gauge body (2) is fixedly mounted on the upper end of the mounting plate (1), a calibration cylinder (3) is fixedly connected to the outside of the micro differential pressure gauge body (2), a pointer body (4) is arranged on the surface of the micro differential pressure gauge body (2), a piston assembly (10) is installed inside the calibration cylinder (3), a movable rod (11) is connected to the outside of the piston assembly (10), a fixed block (12) is fixedly mounted on the end of the movable rod (11), a bracket (13) is fixedly mounted on the upper end of the fixed block (12), a boss (14) is arranged on the upper end of the boss (14), an electric push rod (15) is fixedly mounted on the upper end of the boss (14), a connecting rod (16) is arranged on the movable end of the electric push rod (15), and the end of the connecting rod (16) is fixedly mounted on the surface of the bracket (13), a standard instrument connection port (5) is arranged on one side of the calibration cylinder (3), and a calibrated gauge connection port (7) is arranged on the other side of the calibration cylinder (3).

2. The pointer-type micro differential pressure gauge calibration device according to claim 1 is characterized in that: The standard instrument connection port (5) is externally detachably mounted with a standard instrument connection pipe (6), and the calibrated meter connection port (7) is externally detachably mounted with a calibrated meter connection pipe (8).

3. The pointer-type micro differential pressure gauge calibration device according to claim 2 is characterized in that: The standard instrument connecting tube (6) and the calibrated meter connecting tube (8) are provided with a silicone sealing hose (9), and the caliber of the silicone sealing hose (9) is smaller than the caliber of the standard instrument connecting tube (6) and the calibrated meter connecting tube (8).

4. The pointer-type micro differential pressure gauge calibration device according to claim 1, characterized in that: The piston assembly (10) comprises a piston body (1001), a groove (1002) is provided on the surface of the piston body (1001), and evenly distributed positioning blocks (1003) are arranged outside the piston body (1001).

5. The pointer-type micro differential pressure gauge calibration device according to claim 4 is characterized in that: A first sealing gasket (1004) is provided on the outer surface of the piston body (1001), and a second sealing gasket (1005) is provided outside the first sealing gasket (1004).

6. The pointer-type micro differential pressure gauge calibration device according to claim 1, characterized in that: A sealing ring (1201) is provided on the inner side of the fixed block (12), and the sealing ring (1201) is attached to the surface of the movable rod (11).

7. The pointer-type micro differential pressure gauge calibration device according to claim 1, characterized in that: An extension sleeve (301) is provided at the end of the calibration cylinder (3), and a clamping ring (302) is provided on the surface of the extension sleeve (301).

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