Valve calibration system

Abstract

The utility model discloses a valve calibration system which comprises a power assembly and an air duct assembly, the output end of the air duct assembly is connected with the input end of the power assembly, the calibration system further comprises a butt joint device arranged on one side of the inlet end of the air duct assembly, and the butt joint device comprises a driving part and a sliding support. A mounting part opposite to the inlet end of the air duct assembly is formed on the sliding support, the mounting part is used for detachably mounting a valve to be calibrated, and the output end of the driving part is connected with the sliding support; the driving part is used for driving the sliding support to be close to or far away from the inlet end of the air duct assembly along a to-be-calibrated valve of the air duct assembly, and the output end of the to-be-calibrated valve can be in butt joint with the inlet end of the air duct assembly when the sliding support is close to the output end of the air duct assembly. The valve calibration efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of aerodynamic calibration technology, specifically to a valve calibration system for venturi valves. Background Technology

[0002] Valve calibration is a crucial step in valve production and use. Its core purpose is to ensure that the linear / nonlinear relationship between valve opening and flow rate (or velocity) conforms to the design curve and achieves pressure balance.

[0003] A valve calibration line typically includes a power unit (to provide power for gas flow) and an air duct to provide a controllable airflow environment (flow rate, pressure, temperature). During calibration, the air source is set at one end of the duct, and the valve to be calibrated is set at the other end of the duct. The valve is calibrated by the controllable airflow (standard airflow) passing through the duct.

[0004] In related technologies, the positional relationship between the valve to be calibrated and the air duct needs to be manually adjusted during each calibration, resulting in low work efficiency. Utility Model Content

[0005] This utility model aims to solve one of the technical problems in related technologies to a certain extent. To this end, this utility model provides a valve calibration system with the advantages of convenient installation and high calibration efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a valve calibration system, comprising a power component and a duct component, wherein the output end of the duct component is connected to the input end of the power component, and the calibration system further comprises a docking device disposed on one side of the inlet end of the duct component, the docking device comprising a drive unit and a sliding bracket, wherein the sliding bracket has a mounting portion opposite to the inlet end of the duct component, the mounting portion being used for detachably mounting the valve to be calibrated, the output end of the drive unit being connected to the sliding bracket, the drive unit being used to drive the sliding bracket to approach or move away from the inlet end of the duct component, and being able to dock the input end of the valve to be calibrated with the inlet end of the duct component when the sliding bracket approaches the inlet end of the duct component.

[0007] This technical solution incorporates an automatically sliding docking device during valve calibration. In use, the operator simply inserts the venturi valve to be calibrated into the mounting section of the sliding bracket. The drive unit automatically aligns the valve with the inlet end of the duct assembly, reducing manual adjustment and thus improving work efficiency.

[0008] Furthermore, the mounting portion includes a first support member, a second support member, and a blocking member. The first and second support members are spaced apart along the air delivery direction of the duct assembly. The first support member supports the outer wall of the venturi valve's output end, and the second support member supports the outer wall of the venturi valve's input end. A blocking member is provided on the second support member, which is opposite to the inlet end of the duct assembly and serves to block the venturi valve's input end, thereby sealing the venturi valve's output end with the inlet end of the duct assembly. The mounting portion can provide multi-point support for the valve to be calibrated, resulting in more stable support. Moreover, the blocking member allows the valve to be calibrated to better connect with the inlet end of the duct assembly.

[0009] Furthermore, the first support member has an arc-shaped first support groove for supporting the Venturi valve, and the second support member has an arc-shaped second support groove for supporting the Venturi valve. This provides greater support to the Venturi valve to be calibrated in the circumferential direction, improving the stability of the valve body installation.

[0010] Furthermore, an elastic layer is provided on the arc-shaped surface of the first and second support grooves to reduce damage to the valve to be calibrated.

[0011] Furthermore, the air duct assembly includes an outlet section, a first rectifier section, a first straight pipe section, a standard pipe section, a second straight pipe section, a second rectifier section, and an inlet section connected in sequence. One end of the outlet section is connected to the input port of the power assembly, and one end of the inlet section is used to connect to the valve to be calibrated. The calibration system includes a first frame disposed on the bottom side of the power assembly and multiple second frames disposed on the bottom side of the air duct assembly.

[0012] Furthermore, a second frame is provided on the bottom side of the outlet section, and two spaced tracks are provided on the second frame on the bottom side of the outlet end. The drive unit is fixedly installed on the second frame corresponding to the outlet section, and the sliding bracket is slidably connected to the tracks.

[0013] Furthermore, the frame corresponding to the exit section is provided with two spaced-apart tracks, the drive unit is fixedly mounted on the frame corresponding to the exit section, and the sliding bracket is slidably connected to the tracks.

[0014] Furthermore, the calibration system also includes a first pressure testing component and two second pressure testing components. The two second pressure testing components are respectively disposed on the first straight pipe section and the second straight pipe section, and are used to detect the air pressure in the duct assembly at the corresponding position. The first pressure testing component is disposed on the standard pipe section and includes a first detection unit disposed in the narrow middle part of the standard pipe section and a second detection unit disposed near the input end of the standard pipe section.

[0015] Furthermore, the second pressure testing assembly includes a fixed ring and multiple detection pipes disposed on the fixed ring. The multiple detection pipes are circumferentially distributed around the axis of the fixed ring and extend into the inner cavity of the air duct assembly. The fixed ring has a hollow structure. The detection pipes connect the inner cavity of the fixed ring and the inner cavity of the air duct assembly. A detection port communicating with the inner cavity of the fixed ring is formed on the fixed ring. This improves the accuracy of pressure testing.

[0016] Furthermore, the valve calibration system also includes a sealing ring disposed at the inlet end of the air duct assembly.

[0017] Furthermore, the drive unit is configured as a cylinder or an electric actuator.

[0018] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but this is not intended to limit the technical solution of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Figure 1 This is an overall valve calibration system according to one embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram showing the connection state between the air duct assembly and the valve to be calibrated in one embodiment of the present invention;

[0022] Figure 3 This is a structural diagram of the docking device according to one embodiment of the present invention;

[0023] Figure 4 This is a standard pipe section structure diagram of one embodiment of the present utility model;

[0024] Figure 5 For this Figure 1 Enlarged view of a portion of point A in the middle.

[0025] in,

[0026] 10. Power components;

[0027] 20. Duct assembly; 21. Outlet section; 22. First rectifier section; 23. First straight pipe section; 24. Standard pipe section; 241. First pressure testing assembly; 2411. First testing unit; 2422. Second testing unit; 25. Second straight pipe section; 26. Second rectifier section; 27. Inlet section; 28. Second pressure testing assembly; 281. Fixing ring; 282. Testing pipe; 29. ​​Sealing ring;

[0028] 30. Docking device; 31. Drive unit; 32. Sliding bracket; 33. Mounting unit; 331. First support member; 3311. First support groove; 332. Second support member; 3321. Second support groove; 333. Blocking member;

[0029] 41. First frame; 42. Second frame; 43. Rails;

[0030] 50. Valve to be calibrated; 51. Pressure detection point. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0032] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this utility model. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0033] See appendix Figures 1 to 5 One embodiment of this utility model discloses a valve calibration system, including a power component 10 and a duct component 20. The output end of the duct component 20 is connected to the input end of the power component 10. The calibration system also includes a docking device 30 disposed on one side of the inlet end of the duct component 20. The docking device 30 includes a drive part 31 and a sliding bracket 32. The sliding bracket 32 ​​has a mounting part 33 formed on it, which is opposite to the inlet end of the duct component 20. The mounting part 33 is used to detachably mount the valve 50 to be calibrated. The output end of the drive part 31 is connected to the sliding bracket 32. The drive part 31 is used to drive the sliding bracket 32 ​​to move closer to or away from the inlet end of the duct component 20 along the duct component 20 and to dock the output end of the valve 50 to be calibrated with the inlet end of the duct component 20 when the sliding bracket 32 ​​moves closer to the inlet end of the duct component 20.

[0034] The power component 10 in this embodiment generally includes a housing and a fan disposed inside the housing. The fan serves as a power component, and the housing is provided with an air outlet. During use, air enters the air duct component from the inlet end of the air duct component, flows along the air duct under the action of the fan, and is finally discharged from the air outlet on the housing. The frequency of the fan can be automatically adjusted to adapt to different calibration requirements.

[0035] This embodiment is generally used for calibrating Venturi valves. During calibration, the drive unit 31 first drives the sliding bracket 32 ​​to move away from the air duct assembly 20. Then, the valve body to be calibrated is installed on the mounting part 33 at this position (this position is away from the air duct assembly 20, providing sufficient installation space for the valve 50 to be calibrated and avoiding collision with the air duct assembly 20 during installation). The drive unit 31 is activated (in this embodiment, the drive unit 31 can be set as a linear drive unit 31, such as a cylinder, hydraulic cylinder, or electric actuator). The drive unit 31 drives the sliding bracket 32 ​​carrying the valve 50 to be calibrated to approach the inlet end of the air duct assembly 20. Through the design of the mounting part 33, the output port of the valve 50 to be calibrated is aligned with the inlet of the air duct assembly 20. In this way, under the action of the drive unit 31, the valve 50 to be calibrated and the air duct assembly 20 are automatically docked (to ensure calibration accuracy, a sealed docking is required), reducing the workload and docking error during manual docking, and improving work efficiency and docking effect.

[0036] In this embodiment, the valve to be calibrated 50 is detachably connected to the mounting part 33. In actual installation, the fit between the mounting part 33 and the valve to be calibrated 50 can be configured in various forms, such as embedding or snap-fitting. This facilitates the assembly and disassembly of the valve to be calibrated 50 on the mounting part 33.

[0037] This embodiment does not specifically limit the structure of the drive unit 31. In actual use, the drive unit 31 can be configured as a cylinder or an electric actuator.

[0038] One embodiment of this utility model is shown in the appendix. Figure 3 Taking the venturi valve 50 to be calibrated as an example, the mounting part 33 includes a first support 331, a second support 332, and a blocking member 333. The first support 331 and the second support 332 are distributed at intervals along the air delivery direction of the air duct assembly 20. The first support 331 is used to support the outer wall of the output end of the venturi valve, and the second support 332 is used to support the outer wall of the input end of the venturi valve. The blocking member 333 is provided on the second support 332. The blocking member 333 is opposite to the inlet end of the air duct assembly 20 and is used to block the input end of the valve 50 to be calibrated, so that the output end of the venturi valve is sealed and connected to the inlet end of the air duct assembly 20.

[0039] In this embodiment, the mounting part 33 includes a first support member 331 and a second support member 332 spaced apart. The front and rear sections of the valve to be calibrated 50 (in this embodiment, a Venturi valve) are supported by the first support member 331 and the second support member 332 respectively, providing multi-point support for the valve to be calibrated 50 and making the support effect more stable. Furthermore, this embodiment also includes a blocking member 333 on the second support member 332. The blocking member 333 abuts against the end face of the input end of the Venturi valve, as shown in the attached figure. This limits the position of the Venturi valve along the axial direction. When the driving part 31 drives the sliding bracket 32 ​​to move, causing the Venturi valve to dock with the air duct assembly 20, the blocking member 333 pushes the Venturi valve towards the air duct assembly 20 under the driving force of the driving part 31, and finally presses it tightly against the inlet end of the air duct assembly 20, achieving docking with the air duct assembly 20. Through the driving part 31, the pressure at the docking point can be well controlled, ensuring a better sealing effect.

[0040] In this embodiment, the specific structure of the blocking member 333 is not specifically limited. The blocking member 333 can be set as a ring structure to block and limit the output end of the venturi valve in the circumferential direction, or it can only support a part of the circumferential direction of the input end of the venturi valve, such as within a 180° range or at multiple points in the circumferential direction, as long as it can achieve a stable support effect.

[0041] To further improve the stability of the venturi valve support, in one embodiment of the present invention, the first support member 331 is formed with an arc-shaped first support groove 3311 for supporting the venturi valve, and the second support member 332 is formed with an arc-shaped second support groove 3321 for supporting the venturi valve.

[0042] As attached Figure 3 As shown, in this embodiment, the first support member 331 and the second support member 332 are respectively formed with arc-shaped grooves. The arc-shaped grooves are set as arc-shaped structures that cooperate with the outer wall of the Venturi valve. In this way, the mounting part 33 forms a larger support area with the Venturi valve to be calibrated, and can limit the valve body 50 to be calibrated in the radial direction, thereby improving the stability and convenience of valve body installation.

[0043] To prevent damage to the valve 50 to be calibrated during the calibration process, an elastic layer is provided on the arc-shaped surfaces of the first support groove 3311 and the second support groove 3321. In this embodiment, the elastic layer reduces wear on the outer wall of the valve 50 during installation.

[0044] Of course, it is conceivable that, in order to achieve the elastic support effect, the first support member 331 and the second support member 332 can be made of elastic material as a whole. Of course, in order to ensure the strength of the first support member 331 and the second support member 332, a rigid support member that conforms to the shape of the first support member 331 and the second support member 332 can be provided on one side of the first support member 331 and the second support member 332.

[0045] As one embodiment of this utility model, as shown in the appendix Figure 1 As shown, the air duct assembly 20 includes an outlet section 21, a first rectifier section 22, a first straight pipe section 23, a standard pipe section 24, a second straight pipe section 25, a second rectifier section 26, and an inlet section 27 connected in sequence. One end of the outlet section 21 is connected to the output port of the power assembly 10, and one end of the inlet section 27 is used to connect to the valve 50 to be calibrated. The calibration system includes a first frame 41 disposed on the bottom side of the power assembly 10 and a plurality of second frames 42 disposed on the bottom side of the air duct assembly 20.

[0046] To facilitate the movement and assembly of the entire calibration system, in one embodiment of the present invention, the bottom side of the inlet section 27 is provided with a second frame 42, and the bottom side of the outlet end of the second frame 42 is provided with two spaced tracks 43. The drive unit 31 is fixedly mounted on the second frame 42 corresponding to the inlet section 27, and the sliding bracket 32 ​​is slidably connected to the tracks 43.

[0047] Because the overall length of the valve calibration system is quite long, generally nearly 10 meters, it would be very difficult to move the entire valve calibration system. In this embodiment, each frame can be moved individually. The air duct assembly 20 is divided into multiple sections (outlet section 21, first rectifier section 22, first straight pipe section 23, standard pipe section 24, second straight pipe section 25, second rectifier section 26, and inlet section 27). In this embodiment, the air duct assembly 20 is divided into 7 sections. In use, each section can be moved individually by setting a corresponding second frame 42, which facilitates transportation. Moreover, during assembly, the frame setting makes it easy to adjust the relative position between two assembled sections, improving assembly efficiency.

[0048] Of course, it is conceivable that multiple sections could be set together on the same second frame 42.

[0049] It is important to note that the duct assembly 20 in this embodiment is provided with two rectifying sections (first rectifying section 22 and second rectifying section 26) and two long straight sections (first straight pipe section 23 and second straight pipe section 25). In use, the rectifying sections are set on the corresponding long straight sections, and the first straight pipe section 23 and the second straight pipe section 25 are distributed on both sides of the standard pipe section 24. This ensures that the airflow through the standard pipe section 24 (Venturi tube) is uniform and stable, thereby ensuring the accuracy of the calculated flow rate.

[0050] In one embodiment of this utility model, two spaced tracks 43 are provided on the frame corresponding to the entrance section 27, the drive unit 31 is fixedly installed on the frame corresponding to the entrance section 27, and the sliding bracket 32 ​​is slidably connected to the tracks 43.

[0051] In this embodiment, the sliding bracket 32 ​​moves on the track 43, ensuring the stability of the sliding bracket 32's movement and reducing friction during the movement.

[0052] As one embodiment of this utility model, see the appendix. Figure 1 , 5 The calibration system further includes a first pressure testing component 241 and two second pressure testing components 28. The two second pressure testing components 28 are respectively disposed on the first straight pipe section 23 and the second straight pipe section 25, and are used to detect the air pressure in the air duct assembly 20 at the corresponding positions. The first pressure testing component 241 is disposed on the standard pipe section 24 and includes a first detection unit 2411 disposed in the narrow middle part of the standard pipe section 24 and a second detection unit 2422 disposed near the input end of the standard pipe section 24.

[0053] In this embodiment, the two second pressure test components 28 have different functions. Specifically, the second pressure test component 28 set on the first straight pipe section 23 is used to detect the pressure inside the air duct component 20 to avoid the pressure being too low and affecting the measurement data. The second pressure test component 28 set on the second straight pipe section 25 is used together with the pressure test component set at the input end of the valve to be calibrated 50 to calculate the cross pressure when the valve to be calibrated 50 is activated.

[0054] In this embodiment, the first pressure testing assembly 241 on the standard pipe section 24 includes a first detection unit 2411 and a second detection unit 2422. The first detection unit 2411 is used to detect the pressure in the narrow middle section of the venturi tube, and the second detection unit 2422 is used to detect the pressure at the input end of the venturi tube. The flow rate through the standard pipe section 24 (venturi tube) can be calculated by the pressure difference between the first detection unit 2411 and the second detection unit 2422, and then the valve 50 to be calibrated can be calibrated based on the calculated flow rate.

[0055] In one embodiment of this utility model, the second pressure testing assembly 28 includes a fixed ring 281 and a plurality of detection pipes 282 disposed on the fixed ring 281. The plurality of detection pipes 282 are circumferentially distributed around the axis of the fixed ring 281 and extend into the inner cavity of the air duct. The fixed ring 281 has a hollow structure. The detection pipes 282 connect the inner cavity of the fixed ring 281 and the inner cavity of the air duct assembly 20. A detection port communicating with the inner cavity of the fixed ring 281 is formed on the fixed ring 281.

[0056] In this embodiment, multiple detection pipes 282 are connected to different positions of the inner cavity of the air duct assembly in the circumferential direction. In this way, when in use, gas at different positions in the circumferential direction of the inner cavity of the air duct assembly will enter the inner cavity of the fixing ring through the detection pipes 282. The fixing ring 282 will automatically average the air entering from different positions, and then the pressure in the inner cavity of the air duct assembly can be measured more accurately through the detection port.

[0057] This invention does not specifically limit the type of the first pressure testing component 241 and the second pressure testing component 28. In use, pressure can be detected by a pressure sensor. Moreover, during detection, the second pressure component can also be set as a ring structure, which can detect pressure from multiple circumferential positions and improve the accuracy of pressure detection.

[0058] In this embodiment, the duct assembly 20 includes a standard pipe section 24. During use, the standard pipe section 24 can serve as the adjustment basis for the valve 50 to be calibrated. The specific calibration steps are as follows: 1. After the valve 50 to be calibrated is installed and connected to the inlet end of the duct assembly 20, the calibration system is turned on; 2. The system automatically adjusts the fan frequency to make the cross pressure across the two ends of the valve 50 reach the set pressure (calculated based on the pressure measured by the second pressure testing component 28 set in the second straight pipe section 25 and the pressure at the pressure detection point 51 of the valve 50 to be calibrated). It should be noted that the set pressure is based on the... The calibration valve 50 is determined by the cross pressure at the input and output ends during actual use. For example, if the cross pressure of the valve 50 to be calibrated is between 150Pa and 750Pa during use, then during calibration, we can take the middle value of 450Pa as the set pressure, which can make the calibration more accurate; 3. Read the pressure difference value between the first detection unit 2411 and the second detection unit 2422 of the standard pipe section 24 and calculate the flow rate, and then write the corresponding flow rate data into the valve 50 to be calibrated; 4. Control the opening of the valve 50 to be calibrated to increase, repeat the above process to record the flow rate, until the entire air volume calibration process is completed.

[0059] As one embodiment of the present invention, the valve calibration system further includes a sealing ring 29 disposed at the inlet end of the air duct assembly 20.

[0060] During the calibration process, the sealing of the calibration system is a key factor affecting the calibration accuracy. In order to further improve the sealing effect, a sealing ring 29 is provided at the inlet end of the air duct assembly 20 in this embodiment. When the valve to be calibrated 50 is connected to the inlet end of the air duct assembly 20, the sealing ring 29 can be squeezed to achieve a better sealing effect.

[0061] In this embodiment, the specific type of sealing ring 29 is not specifically limited. It can be an O-ring or other types of sealing ring 29, as long as it can ensure a good sealing effect.

[0062] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A valve calibration system comprising a power pack (10) and a duct pack (20), the output of the duct pack (20) being connected to the input of the power pack (10), characterised in that, The calibration system further comprises a docking device (30) arranged at one side of the inlet end of the air duct assembly (20), the docking device (30) comprising a driving part (31) and a sliding bracket (32), the sliding bracket (32) being formed with a mounting part (33) opposite the inlet end of the air duct assembly (20), the mounting part (33) being used for detachably mounting the valve to be calibrated (50), and the output end of the driving part (31) being connected with the sliding bracket (32) and used for driving the sliding bracket (32) to approach or move away from the inlet end of the air duct assembly (20) and enabling the output end of the valve to be calibrated (50) to be docked with the inlet end of the air duct assembly (20) when the sliding bracket (32) approaches the inlet end of the air duct assembly (20).

2. The valve calibration system of claim 1, wherein, The mounting part (33) comprises a first support (331), a second support (332) and a blocking piece (333), the first support (331) and the second support (332) are spaced apart along the axis direction of the inlet end of the air duct assembly (20), the first support (331) is used for supporting the outer wall of the output end of the valve to be calibrated (50), the second support (332) is used for supporting the outer wall of the input end of the valve to be calibrated (50), and the second support (332) is provided with the blocking piece (333) opposite the inlet end of the air duct assembly (20) and used for blocking the input end of the valve to be calibrated (50) to enable the output end of the valve to be calibrated (50) to be sealingly docked with the inlet end of the air duct assembly (20).

3. The valve calibration system of claim 2, wherein, The first support (331) is formed with a first support groove (3311) for supporting the arc shape of the valve to be calibrated (50), and the second support (332) is formed with a second support groove (3321) for supporting the arc shape of the valve to be calibrated (50).

4. The valve calibration system of claim 3, wherein, The arc surfaces of the first support groove (3311) and the second support groove (3321) are provided with elastic layers.

5. The valve calibration system of claim 1, wherein, The air duct assembly (20) comprises an outlet section (21), a first rectifying section (22), a first straight pipe section (23), a standard pipe section (24), a second straight pipe section (25), a second rectifying section (26) and an inlet section (27) connected in sequence, one end of the inlet section (27) is connected with the input end of the power assembly (10), one end of the inlet section (27) is used for docking with the valve to be calibrated (50), and the calibration system comprises a first vehicle frame (41) arranged at the bottom side of the power assembly (10) and a plurality of second vehicle frames (42) arranged at the bottom side of the air duct assembly (20).

6. The valve calibration system of claim 5, wherein, The bottom side of the outlet section (21) is provided with the second vehicle frame (42), two spaced apart tracks (43) are arranged on the second vehicle frame (42) of the bottom side of the outlet section (21), the driving part (31) is fixedly arranged on the corresponding second vehicle frame (42) of the outlet section (21), and the sliding bracket (32) is slidably connected on the tracks (43).

7. The valve calibration system of claim 5, wherein, The calibration system further comprises a first pressure testing component (241) and two second pressure testing components (28), the two second pressure testing components (28) are respectively arranged on the first straight pipe section (23) and the second straight pipe section (25) and are used for detecting the air pressure in the air duct component (20) at the corresponding positions, and the first pressure testing component (241) is arranged on the standard pipe section (24) and comprises a first detection unit (2411) arranged at the middle narrow part of the standard pipe section (24) and a second detection unit (2422) arranged close to the input end of the standard pipe section (24).

8. The valve calibration system of claim 7, wherein, The second pressure testing component (28) comprises a fixing ring (281) and a plurality of detection pipes (282) arranged on the fixing ring (281), the plurality of detection pipes (282) are distributed in the circumferential direction around the axis of the fixing ring (281) and respectively extend into the inner cavity of the air duct, the fixing ring (281) is a hollow structure, the detection pipes (282) are in communication with the inner cavity of the fixing ring (281) and the inner cavity of the air duct component (20), and the fixing ring (281) is formed with a detection port in communication with the inner cavity of the fixing ring (281).

9. The valve calibration system of any one of claims 1 to 8, wherein, The valve calibration system further comprises a sealing ring (29) arranged at the inlet end of the air duct component (20).

10. The valve calibration system of any one of claims 1 to 8, wherein, The driving part (31) is arranged as a pneumatic cylinder or an electric push rod.

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