Signal testing method applied to an electrical conversion mechanism

Abstract

The present invention provides a signal testing method applied to an electrical conversion mechanism, including: a conversion seat; an air inlet for introducing a gas source, a jet port for ejecting gas, and a back pressure channel for outputting gas are provided in the conversion seat. The gas source enters from the air inlet, and after entering the air inlet, it is split into the jet port and the back pressure channel, and then is output from the jet port and the back pressure channel respectively; a piezoelectric module is further provided on the conversion seat, the upper end of the piezoelectric module faces the jet port, and a jet gap is formed between the piezoelectric module and the jet port. The gas source is discharged from the jet gap into the atmosphere; a pressure sensor is also placed beside the conversion seat, and the pressure sensor measures the air pressure signal of the gas output from the back pressure channel. The beneficial effects brought by the technical solution in the present invention at least include: changing the voltage signal input to the piezoelectric component, changing the mechanical structure of the piezoelectric component, thereby changing the air pressure value output from the back pressure channel, and through the detection of the air pressure by the pressure sensor, the input voltage signal can be accurately obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical conversion, and particularly to a signal testing method applied to an electrical conversion mechanism. Background Art

[0002] An intelligent valve positioner is an important control accessory for a regulating valve device and is usually used in conjunction with a diaphragm pneumatic actuator. It receives the input voltage signal from the controller and then converts it into the output air pressure signal of the intelligent valve positioner to control the pneumatic actuator, thereby controlling the action of the regulating valve; after the regulating valve acts, the displacement signal of the valve stem is fed back to the intelligent valve positioner through the valve position feedback mechanism, and the valve position signal is converted into an electrical signal by the intelligent valve positioner and transmitted to the controller. The main principle of the electrical conversion mechanism in the intelligent valve positioner is to change the output back pressure air pressure by changing the exhaust resistance of the exhaust passage.

[0003] The existing electrical conversion mechanism needs to change the distance from the exhaust passage by the offset of the metal sheet, thereby changing the exhaust resistance; however, when the electrical conversion mechanism is subjected to severe vibration, it will cause unstable vibration deformation of the metal sheet, affecting the stability and accuracy of the back pressure signal, and after the metal sheet undergoes multiple unstable vibration deformations, it will undergo permanent deformation or even failure, reducing the service life of the electrical conversion mechanism. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a signal testing method applied to an electrical conversion mechanism to solve the problem that the metal sheet will undergo permanent deformation or even failure after multiple unstable vibration deformations in the prior art.

[0005] To achieve the above purpose and other related purposes, the present invention provides a signal testing method applied to an electrical conversion mechanism, including:

[0006] A conversion seat; an air inlet for introducing a gas source, a jet port for ejecting the gas source, and a back pressure passage for outputting the gas are provided in the conversion seat. The gas source enters from the air inlet, and after entering the air inlet, the gas source is split into the jet port and the back pressure passage, and then is ejected from the jet port and output from the back pressure passage respectively;

[0007] A piezoelectric component is further provided on the conversion seat. The upper end of the piezoelectric component faces the jet port directly, and a jet gap is formed between the piezoelectric component and the jet port. The gas source is discharged from the jet gap into the atmosphere;

[0008] A pressure sensor is also placed beside the conversion seat, and the pressure sensor measures the air pressure signal of the gas source output from the back pressure passage;

[0009] According to the change of the input target voltage value, the volume of the piezoelectric component changes accordingly, so that the size of the injection gap changes accordingly;

[0010] According to the change of the injection gap, the air source pressure values output by the injection port and the back pressure channel change accordingly;

[0011] The air source pressure value output by the back pressure channel is detected by a pressure sensor to determine the size of the air source pressure value of the back pressure channel, and at the same time, the input target voltage value is determined.

[0012] Optionally, the piezoelectric component includes a mounting plate and a piezoelectric ceramic block;

[0013] A fixing groove is formed in the conversion seat, the mounting plate is placed in the fixing groove, the piezoelectric ceramic block is connected to the mounting plate, the upper end of the piezoelectric ceramic block faces the injection port, and the piezoelectric ceramic block obtains the target voltage value;

[0014] When the target voltage value input to the piezoelectric ceramic block becomes larger, the injection gap becomes smaller, the air source pressure ejected from the injection port becomes larger, and the air source pressure output by the back pressure channel becomes larger; when the target voltage value input to the piezoelectric ceramic block becomes smaller, the injection gap becomes larger, the air source pressure ejected from the injection port becomes smaller, and the air source pressure output by the back pressure channel becomes smaller.

[0015] Optionally, an adjustment hole is formed in the side wall of the fixing groove, an adjustment member is arranged in the adjustment hole, one end of the adjustment member penetrates through the mounting plate, and the adjustment member slides up and down in the adjustment hole to drive the mounting plate and the piezoelectric ceramic block to move up and down, so as to change the initial size of the injection gap.

[0016] Optionally, an installation groove communicating with the fixing groove is formed in the conversion seat, a nozzle is arranged in the installation groove, the injection port is arranged on the nozzle, and an internal channel is formed in the nozzle to communicate the injection port with the air inlet and the back pressure channel.

[0017] Optionally, the connection between the installation groove and the upper end of the nozzle is sealed by a second sealing ring, and the connection between the installation groove and the lower end of the injector nozzle is sealed by a third sealing ring, so as to form a sealing cavity between the inside of the installation groove and the outside of the nozzle, and the air source flows into the sealing cavity after entering from the air inlet.

[0018] Optionally, the internal channel of the nozzle includes a first channel and a second channel. The first channel is horizontally arranged inside the nozzle, and both ends of the first channel communicate with the sealing cavity respectively. The second channel is vertically arranged inside the nozzle, the upper end of the second channel communicates with the first channel, and the lower end of the second channel communicates with the injection port. After the air source enters the sealing cavity, it flows into the second channel through the first channel and then is ejected from the injection port.

[0019] Optionally, a threaded structure is provided on the upper part of the inner wall of the installation groove, and a threaded structure is provided on the upper part of the outer wall of the injection nozzle. The thread on the inner wall of the installation groove is engaged with the thread on the outer wall of the injection nozzle. By determining the air source pressure of the external working environment of the conversion seat, the injection nozzle is rotated to adjust the tightening degree between the injection nozzle and the installation groove.

[0020] Optionally, an air inlet passage is provided in the conversion seat. The first end of the air inlet passage is communicated with the air inlet, and the second end of the air inlet passage is communicated with the sealing cavity. The air source enters the air inlet passage from the throttle member, and then part of the air source enters the sealing cavity through the air inlet passage.

[0021] Optionally, an air outlet passage is provided in the conversion seat. The first end of the air outlet passage leads to the outside of the conversion seat and is sealed. The second end of the air outlet passage is communicated with the sealing cavity. Part of the air source enters the air outlet passage from the sealing cavity and is then output through the back pressure passage. The pressure sensor receives the air pressure signal output from the back pressure passage to realize the output signal feedback.

[0022] Optionally, a throttle member is installed in the air inlet. A first sealing ring is provided between the air inlet and the throttle member. The air source enters through the air inlet hole of the throttle member. Different throttle members with different air inlet hole diameters are replaced according to different working environments to realize the speed reduction and pressure reduction of the air source.

[0023] As described above, the beneficial effects brought by the technical solutions in the present invention at least include:

[0024] 1. By adopting the piezoelectric component, when the input voltage signal increases, the height of the piezoelectric component increases, the injection gap decreases, and the output gas pressure increases; when the input voltage signal decreases, the height of the piezoelectric component decreases, the injection gap increases, and the output air pressure decreases. Through the detection of the air pressure by the pressure sensor, the output gas pressure can be accurately obtained, and the input voltage signal can also be deduced from the gas pressure value. Moreover, this structure is not easily damaged or deformed, making the service life of the device longer;

[0025] 2. Even when strongly vibrated, the pressure of the output back pressure gas of the present application can remain stable, providing the stability and accuracy of the output signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It shows a schematic structural diagram of an exemplary embodiment of the present invention;

[0027] Figure 2 It shows a front sectional view of an exemplary embodiment of the present invention;

[0028] Figure 3 It shows a side sectional view of an exemplary embodiment of the present invention.

[0029] Description of Part Numbers

[0030] 1. Adapter; 2. Fixed plate; 3. Air inlet; 4. Throttle part; 5. First sealing ring; 6. Fixed groove; 7. Installation groove; 8. Injection nozzle; 9. Second sealing ring; 10. Limit ring; 11. Third sealing ring; 12. Sealing cavity; 13. First channel; 14. Second channel; 15. First sealing ball; 16. Injection port; 17. Installation plate; 18. Piezoelectric ceramic block; 19. Adjusting hole; 20. Installation pressing plate; 21. Air inlet channel; 22. Air outlet channel; 23. Second sealing ball; 24. Back pressure channel; 25. Third channel. Specific Embodiments

[0031] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0032] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the layout type of its components may also be more complex.

[0033] It should be noted that in this embodiment, the end face where the throttle part is installed is defined as the front.

[0034] The principle of the piezoelectric effect is that if pressure is applied to a piezoelectric material, it will generate a potential difference (referred to as the direct piezoelectric effect). Conversely, if a voltage is applied, mechanical stress will be generated (referred to as the inverse piezoelectric effect). If the pressure is a high-frequency vibration, then a high-frequency current is generated. When a high-frequency electrical signal is applied to a piezoelectric ceramic, a high-frequency sound signal (mechanical vibration) is generated, which is the ultrasonic signal we usually mention. That is to say, a piezoelectric ceramic has the function of converting and inversely converting between mechanical energy and electrical energy;

[0035] Piezoelectric ceramics are a type of electronic ceramic material with piezoelectric properties. The main difference from typical piezoelectric quartz crystals that do not contain ferroelectric components is that the crystal phases that make up their main components are all ferroelectric grains. Since ceramics are polycrystalline aggregates with randomly oriented grains, the spontaneous polarization vectors of each ferroelectric grain are also randomly oriented. In order for the ceramic to exhibit macroscopic piezoelectric properties, it must be subjected to polarization treatment under a strong DC electric field after being fired and coated with electrodes on the end faces, so that the original randomly oriented spontaneous polarization vectors preferentially orient along the electric field direction. After polarization treatment, the piezoelectric ceramic will retain a certain macroscopic remanent polarization intensity after the electric field is removed, thus endowing the ceramic with certain piezoelectric properties.

[0036] Figure 1 is a schematic structural diagram shown in an exemplary embodiment of the present application. Please refer to Figure 1 The present invention provides an electrical conversion mechanism, including:

[0037] A conversion seat 1 is provided with an air inlet 3, a jet port 16, a back pressure channel 24 and a piezoelectric component. Among them, the piezoelectric component includes a mounting plate 17 and a piezoelectric ceramic block 18. The piezoelectric ceramic block 18 and the jet port 16 cooperate to form a jet gap. The air inlet 3, the jet port 16 and the back pressure channel 24 are connected. The gas source enters from the air inlet 3, and then due to the jet gap, an air pressure greater than atmospheric pressure is formed. Part of the gas source is also output from the back pressure channel 24, and then after being detected by a pressure sensor, the output gas pressure value is obtained, so as to reflect the magnitude of the input voltage.

[0038] The conversion seat 1 can be in the shape of a cuboid with rounded corners at the two upper corners. Fixed plates 2 are provided on the left and right sides of the lower end of the conversion seat 1. Each fixed plate 2 is provided with threaded holes for installation and fixation. An air inlet 3 is provided on the front end face of the conversion seat 1. The air inlet 3 is located in the upper part of the conversion seat 1. The air inlet 3 is a stepped hole. A throttle member 4 is provided in the air inlet 3. A first sealing ring 5 is provided between the throttle member 4 and the air inlet 3 to ensure that the gas source will not flow out from the gap between the air inlet 3 and the throttle member 4, affecting the accuracy of the test. A fixing groove 6 is provided in the lower part of the conversion seat 1, and the fixing groove 6 penetrates the front end face and the rear end face of the conversion seat 1.

[0039] Furthermore, the air inlet 3 and the throttle member 4 are detachably connected, which is convenient for replacing throttle members 4 with different inlet diameters and for adjusting the gas volume and pressure of the inlet gas source.

[0040] Figure 2 is a front cross-sectional view shown in an exemplary embodiment of the present application. Please refer to Figure 2: There is also an installation groove 7 on the upper part of the conversion base 1. The top of the installation groove 7 penetrates through the top of the conversion base 1, and the bottom of the installation groove 7 penetrates through the conversion base 1 and communicates with the fixed groove 6. And the installation groove 7 is of a stepped structure. There are two steps inside the installation groove 7. The inner wall of the top of the installation groove 7 is provided with threads. There is a spray nozzle 8 in the installation groove 7. The top of the spray nozzle 8 is also provided with threads. The top of the spray nozzle 8 is threadedly matched with the inner wall of the installation groove 7 to move up or down. The upper diameter of the spray nozzle 8 is larger than the lower diameter of the spray nozzle 8. A second sealing ring 9 is provided at the connection between the first step in the installation groove 7 and the upper part of the spray nozzle 8. The first step in the installation groove 7 cooperates with the upper part of the spray nozzle 8 for sealing. A limiting ring 10 is sleeved in the middle of the spray nozzle 8. A third sealing ring 11 is provided at the second step in the installation groove 7. The limiting ring 10 cooperates with the second step for sealing. The first step and the second step in the installation groove 7 are sealed by two sealing rings, so as to form a sealed cavity 12 in the middle of the installation groove 7. The lower part of the spray nozzle 8 passes through the second step, extends out of the bottom of the installation groove 7 and extends into the fixed groove 6. And the first sealing ring 5, the second sealing ring 9 and the second sealing ring 9 all adopt plastic sealing rings. Using plastic sealing rings instead of rubber sealing rings for sealing can work normally in a high-radiation environment. The sealing pressure can be adjusted by threaded connection and can work under changed gas source pressure.

[0041] The spray nozzle 8 is also provided with a first channel 13 and a second channel 14. The first channel 13 is horizontally provided in the middle of the spray nozzle 8. Both ends of the first channel 13 communicate with the sealed cavity 12. The spray nozzle 8 is also vertically provided with a second channel 14. The second channel 14 communicates with the first channel 13. A third channel 25 is also provided in the upper part of the second channel 14. The bottom of the third channel 25 communicates with the top of the second channel 14. The top of the third channel 25 leads to the outside of the spray nozzle. And a first sealing ball 15 is provided at the top of the third channel 25 for sealing. Such a setting is convenient for production and processing. The bottom of the second channel 14 communicates with the spray port 16. And the diameter of the spray port 16 is smaller than the diameter of the second channel 14. Cooperating with the piezoelectric component can realize high-sensitivity exhaust resistance adjustment.

[0042] Figure 3 is a side cross-sectional view shown in an exemplary embodiment of the present application. Please refer to Figure 3 : A piezoelectric component is provided in the fixed groove 6. The piezoelectric component includes a piezoelectric ceramic block 18 and a mounting plate 17. The mounting plate 17 is provided at the inner bottom of the fixed groove. The concave surface of the mounting plate 17 faces upward. The piezoelectric ceramic block 18 is provided in the concave surface of the mounting plate 17. The bottom of the piezoelectric ceramic block 18 is adhesively connected to the concave surface of the mounting plate 17.

[0043] Further, two vertically arranged adjusting holes 19 are provided on the rear end face of the conversion base 1. Both of the two adjusting holes are long strip holes. The two adjusting holes 19 are arranged in parallel, and both of the two adjusting holes 19 communicate with the fixing groove 6. Fixing bolts are respectively arranged in the adjusting holes 19. The fixing bolts are threadedly connected with the mounting plate 17. The diameter of the nut of the fixing bolt is greater than the transverse length of the adjusting hole 19, which can not only fix the mounting plate 17, but also adjust the up and down position of the mounting plate 17 in the placing groove, so as to adjust the initial position of the piezoelectric ceramic block 18.

[0044] Further, a mounting pressing plate 20 is also provided on the back of the mounting plate 17, which is convenient for the installation and fixation of the piezoelectric ceramic block 18;

[0045] An air jet gap is formed between the piezoelectric ceramic block 18 and the jet orifice 16. When the input voltage signal changes, the size of the air jet gap changes. For example: when the input voltage signal increases, the height of the piezoelectric ceramic block 18 increases, the distance between the piezoelectric ceramic block 18 and the jet orifice 16 decreases, and the air jet gap decreases; when the input voltage signal decreases, the height of the piezoelectric ceramic block 18 decreases, the distance between the piezoelectric ceramic block 18 and the jet orifice 16 increases, and the air jet gap increases.

[0046] An air inlet channel 21 is also provided inside the upper end of the conversion base 1. The first end of the air inlet channel 21 communicates with the air inlet 3, and the first end of the air inlet channel 21 communicates with the sealing cavity 12. An air outlet channel 22 is also provided inside the upper end of the conversion base 1. The air outlet channel 22 and the air inlet channel 21 are on the same axis line, which is convenient for processing. The first end of the air outlet channel 22 communicates with the sealing cavity 12. A second sealing ball 23 is provided inside the second end of the air outlet channel 22 to seal the second end of the air outlet channel 22. The side wall of the air outlet channel 22 is also connected with the first end of a back pressure channel 24. The second end of the back pressure channel 24 penetrates through the conversion base 1.

[0047] Further, the air outlet channel 22 can be arranged at any position on the conversion base 1, but the air outlet channel 22 does not overlap with the air inlet channel 21, and the position of the air outlet channel 22 is equal to or lower than the position of the air inlet channel 21.

[0048] Further, a pressure sensor is also provided beside the conversion base 1, which can detect the signal of the back pressure gas output from the back pressure channel 24.

[0049] The present invention also provides a usage method applied to an electrical conversion mechanism, including:

[0050] Fix and install the conversion base 1 through the threaded holes on the fixing plate 2;

[0051] Adjust the initial height position of the adjusting fixing bolt in the adjusting hole 19, so as to change the distance between the piezoelectric ceramic block 18 and the injection port 16, thereby changing the initial size of the injection gap, enabling the present invention to be applicable to different input voltage signals and control requirements;

[0052] Align the gas source input device with the throttle hole of the throttle member 4, input the gas source from the throttle hole, and by replacing the throttle member 4 with throttle holes of different diameters, the function of reducing the gas source flow rate and pressure is achieved, making it applicable to more working environments;

[0053] After the gas source enters the throttle hole, the gas pressure Pin is obtained simultaneously, and then enters the sealing cavity 12 through the air inlet channel 21;

[0054] Part of the gas source in the sealing cavity 12 enters the first channel 13, then enters the second channel 14 through the first channel 13, and then is ejected into the atmosphere through the injection port 16, and a gas pressure Pr is formed;

[0055] Another part of the gas source in the sealing cavity 12 enters the air outlet channel 22, and then is output through the back pressure channel 24, and has a gas pressure PO;

[0056] A pressure sensor is arranged beside the conversion seat 1, and the pressure sensor is arranged close to the back pressure channel 24. The gas pressure signal of the gas source output from the back pressure channel 24 is detected by the pressure sensor to realize the feedback of the output gas pressure signal.

[0057] According to gas dynamics, the gas pressure PO in the back pressure channel 24 is jointly determined by the gas pressure Pr in the exhaust channel and the gas source pressure Pin.

[0058] According to the change of the input target voltage value, the volume of the piezoelectric component changes correspondingly, so that the size of the injection gap changes correspondingly;

[0059] According to the change of the injection gap, the gas pressure values of the gas source output from the injection port 16 and the back pressure channel 24 change correspondingly;

[0060] The gas pressure value of the gas source output from the back pressure channel is detected by the pressure sensor to determine the size of the gas pressure value of the gas source in the back pressure channel, so as to determine the target voltage value.

[0061] Furthermore, adjust the initial position of the mounting plate 17 fixed by the adjusting fixing bolt, drive the initial position of the piezoelectric ceramic block 18 to change. When the piezoelectric ceramic block 18 is in the lowest position, the jet gap is very large and will not generate resistance to the exhausted gas in the injection port 16. At this time, the back pressure output gas pressure signal PO = Pr, which is the atmospheric pressure and no signal is output; when the piezoelectric ceramic block 18 is in the highest position, the piezoelectric ceramic block 18 is completely attached to the injection port 16, and the injection port 16 is blocked. At this time, the back pressure output gas pressure signal PO = Pin.

[0062] When the input voltage signal increases, the height of the piezoelectric ceramic block 18 increases, the injection gap decreases, and the pressure Pr of the ejected gas increases. At this time, the output gas pressure PO of the back pressure channel 24 also increases accordingly; when the input voltage signal decreases, the height of the piezoelectric ceramic block 18 decreases, the injection gap increases, and the pressure Pr of the ejected gas decreases. At this time, the output gas pressure PO of the back pressure channel 24 also decreases accordingly.

[0063] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A signal testing method applied to an electrical conversion mechanism, characterized in that, Including: The electrical conversion mechanism includes a conversion base; an air inlet for introducing a gas source, a jet port for ejecting the gas source, and a backpressure channel for outputting gas are provided in the conversion base. The gas source enters from the air inlet, and after entering the air inlet, it is split into the jet port and the backpressure channel, and then is ejected from the jet port and output from the backpressure channel respectively. A piezoelectric component is further provided on the conversion base. The upper end of the piezoelectric component faces the jet port directly. A jet gap is formed between the piezoelectric component and the jet port, and the gas source is discharged into the atmosphere from the jet gap. A pressure sensor is placed beside the conversion base, and the pressure sensor measures the air pressure signal of the gas source output from the backpressure channel. According to the change of the input target voltage value, the volume of the piezoelectric component changes accordingly, so that the size of the jet gap changes accordingly. According to the change of the jet gap, the air pressure values of the gas source output from the jet port and the backpressure channel change accordingly. By detecting the air pressure value of the gas source output from the backpressure channel with the pressure sensor, the size of the air pressure value of the gas source in the backpressure channel is determined, and at the same time, the input target voltage value is determined. The piezoelectric component includes a mounting plate and a piezoelectric ceramic block. A fixing groove is opened in the conversion base, the mounting plate is placed in the fixing groove, the piezoelectric ceramic block is connected to the mounting plate, the upper end of the piezoelectric ceramic block faces the jet port directly, and the piezoelectric ceramic block obtains the target voltage value. When the target voltage value input to the piezoelectric ceramic block becomes larger, the jet gap becomes smaller, the air pressure of the gas source ejected from the jet port becomes larger, and the air pressure of the gas source output from the backpressure channel becomes larger; when the target voltage value input to the piezoelectric ceramic block becomes smaller, the jet gap becomes larger, the air pressure of the gas source ejected from the jet port becomes smaller, and the air pressure of the gas source output from the backpressure channel becomes smaller.

2. The method according to claim 1, characterized in that: An adjustment hole is opened in the side wall of the fixing groove, and an adjustment member is arranged in the adjustment hole. One end of the adjustment member penetrates through the mounting plate, and the adjustment member slides up and down in the adjustment hole, driving the mounting plate and the piezoelectric ceramic block to move up and down, so as to change the initial size of the jet gap.

3. The method according to claim 1, characterized in that: An installation groove communicating with the fixing groove is opened in the conversion base, a jet nozzle is arranged in the installation groove, the jet port is arranged on the jet nozzle, and an internal channel is opened on the jet nozzle to communicate the jet port with the air inlet and the backpressure channel.

4. The method according to claim 3, characterized in that: The connection between the installation groove and the upper end of the jet nozzle is sealed by a second sealing ring, and the connection between the installation groove and the lower end of the injector nozzle is sealed by a third sealing ring, so as to form a sealed cavity between the inside of the installation groove and the outside of the jet nozzle, and the gas source flows into the sealed cavity after entering from the air inlet.

5. The method according to claim 4, characterized in that: The internal channel of the jet nozzle includes a first channel and a second channel. The first channel is horizontally arranged inside the jet nozzle, and both ends of the first channel communicate with the sealed cavity respectively. The second channel is vertically arranged inside the jet nozzle, the upper end of the second channel communicates with the first channel, and the lower end of the second channel communicates with the jet port. After the gas source enters the sealed cavity, it flows into the second channel through the first channel and is then ejected from the jet port.

6. The method according to claim 3, characterized in that: A threaded structure is provided on the upper part of the inner wall of the installation groove, and a threaded structure is provided on the upper part of the outer wall of the injection nozzle. The thread on the inner wall of the installation groove is matched with the thread on the outer wall of the injection nozzle. By determining the air source pressure of the external working environment of the conversion seat, the injection nozzle is rotated to adjust the tightening degree between the injection nozzle and the installation groove.

7. The method according to claim 4, characterized in that: An air inlet channel is provided in the conversion seat. The first end of the air inlet channel is communicated with the air inlet, and the second end of the air inlet channel is communicated with the sealing cavity. The air source enters the air inlet channel from the throttle member, and then part of the air source enters the sealing cavity through the air inlet channel.

8. The method according to claim 7, characterized in that: An air outlet channel is provided in the conversion seat. The first end of the air outlet channel leads to the outside of the conversion seat and is sealed. The second end of the air outlet channel is communicated with the sealing cavity. Part of the air source enters the air outlet channel from the sealing cavity and is then output through the back pressure channel. The pressure sensor receives the air pressure signal output from the back pressure channel to achieve output signal feedback.

9. The method according to claim 1, characterized in that: A throttle member is installed in the air inlet. A first sealing ring is provided between the air inlet and the throttle member. The air source enters through the air inlet hole of the throttle member. Different throttle members with different air inlet hole diameters are replaced according to different working environments to achieve the deceleration and decompression of the air source.

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