Pneumatic PI operation function integration device

Abstract

The utility model relates to a pneumatic PI operation function integration device which is characterized in that a comparison corrugated pipe and a standard corrugated pipe are arranged between a bottom plate and a baffle of a pneumatic module, when the pressure in the corrugated pipe changes, the length of the corrugated pipe also changes, an upper plate is driven to generate spatial displacement, and after the upper plate generates displacement, an ejector rod is driven to fluctuate; when the ejector rod fluctuates, the distance between the nozzle and the baffle is driven to change, the pressure intensity in a sealing cavity groove is changed, the diaphragm set displaces to press the valve element or be away from the valve element, and when the valve element is pressed, high-pressure air in an air channel on the lower portion of the valve element flows out through a gap between the valve element and the sealing piece and flows to the corrugated pipe; when the valve core is in use, the valve core is separated from the diaphragm group, a pressure relief hole in the diaphragm group can release air in the corrugated pipe, at the moment, the air is sent to the positioner connected with the large container, and the positioner decides to release pressure or supplement pressure for the large container according to a feedback signal of the pneumatic PI operation function integrated device.

Description

Technical Field

[0001] The present application relates to the field of automation control technology, and in particular to a pneumatic PI operation function integrated device. Background Art

[0002] Large containers need to maintain a constant pressure, but this pressure fluctuates due to external interference. This requires maintaining the pressure (i.e., adding or releasing air). However, the working environment may be flammable, and the equipment must be spark-free. Therefore, a purely mechanical controller without any electrical components is urgently needed. Utility Model Content

[0003] In view of this, the present application proposes a pneumatic PI operation function integrated device that can convert and transmit pressure information in a purely mechanical manner.

[0004] According to one aspect of the present application, a pneumatic PI operation function integrated device is provided, comprising: a pneumatic module, a conical spring, a valve core, a sealing plate, a triangular conical spring, a diaphragm assembly, a sealing gland, a bellows, a contrast bellows, a baffle, and a nozzle;

[0005] A sealing cavity groove is provided on one side of the pneumatic module, and the sealing cavity groove is suitable for connecting a first air source, and a communicating vent cavity groove is provided at the bottom of the sealing cavity groove, and the vent cavity groove is suitable for connecting a second air source; the conical spring is sleeved on the outside of the valve core and arranged inside the vent cavity groove; the sealing plate is provided at the bottom of the sealing cavity groove to seal the vent cavity groove, and a penetrating mounting hole is provided on the plate surface of the sealing plate, and the top of the valve core passes through the mounting hole and is located inside the sealing cavity groove; the diaphragm group and the triangular conical spring are arranged inside the sealing cavity, and the triangular conical spring respectively abuts the sealing plate and the diaphragm group; the sealing gland seals the sealing cavity groove, and the sealing gland is spaced a preset distance from the diaphragm group;

[0006] The bellows and the comparison bellows are arranged on one side of the pneumatic module, and the bellows is suitable for connecting to a pressure container, and the comparison bellows is suitable for connecting to a gas transformer of a container to be tested; the baffle is arranged at the telescopic ends of the bellows and the comparison bellows, and can be tilted along with the telescopic extension of the comparison bellows; the nozzle is arranged on the baffle, and the nozzle is connected to the interior of the sealed cavity groove, and the spraying direction is toward the baffle.

[0007] In one possible implementation, the gas source pressure of the second gas source is greater than the gas source pressure of the first gas source.

[0008] In a possible implementation, it further includes: a bottom plate and a tension-compression spring;

[0009] The bottom plate is arranged on one side of the pneumatic module, and the bellows and the comparison bellows are arranged on the bottom plate;

[0010] One end of the tension-compression spring is connected to the bottom plate, and the other end is connected to the baffle. There are more than two tension-compression springs, which are arranged at intervals along the edge position of the bottom plate, and the elastic force of the tension-compression spring is less than the elastic force of the comparison bellows.

[0011] In a possible implementation, it further includes: a nozzle fixing part;

[0012] A connecting groove is formed on the plate surface of the baffle, and the cross-section of the connecting groove is arc-shaped;

[0013] The nozzle fixing part is rotatably arranged on the baffle. The end of the nozzle is connected to the nozzle fixing part, and the ejector rod provided at the top passes through the connecting groove and abuts against the bottom plate.

[0014] In a possible implementation, it further includes: a universal spring seat;

[0015] The universal spring seat is arranged on the bottom plate, and the two ends are respectively fixedly connected to the central position of the bottom plate and the central position of the baffle.

[0016] In a possible implementation, the bellows and the comparison bellows are symmetrically arranged with respect to the plate surface of the baffle.

[0017] In a possible implementation, the sealing gland is a square structure with a hollow interior and an open bottom;

[0018] The open side of the sealing gland is pressed on the top of the sealing cavity groove, and the internal space of the sealing gland matches the diaphragm group.

[0019] In a possible implementation, an air vent hole is formed on the side wall of the sealing gland, and the air vent hole is located on the open side of the sealing gland;

[0020] An air outlet hole is provided on the side wall of the diaphragm group, which communicates with the bottom of the diaphragm group. When the top of the diaphragm group abuts against the inner side wall of the sealing gland, the air outlet hole corresponds to and communicates with the air vent hole.

[0021] In a possible implementation, blocking parts extend from the relative edge positions on one side of the pneumatic module. The blocking parts are plate-shaped structures, located on both sides of the bottom plate, and the extension length of the blocking parts is less than the interval distance between the bottom plate and the baffle.

[0022] In a possible implementation manner, the bottom plate and the baffle are provided with corresponding bellows mounting holes.

[0023] Advantages of the pneumatic PI operation function integration device according to the embodiments of the present application: Between the bottom plate and the baffle of the pneumatic module, a comparison bellows and a bellows are provided. The bottom plate and the baffle are connected by a universal spring seat and a bolt connection. One end of the ejector rod abuts against the bottom plate, and the other end is connected to the nozzle by a thread. When the pressure in one or several bellows changes, the length of the bellows also changes, which will drive the upper plate to have a spatial displacement. After the upper plate generates a displacement, it will drive the ejector rod to fluctuate. After the ejector rod fluctuates, it will drive the change in the distance between the nozzle and the baffle. Since the nozzle is internally connected to the sealing cavity groove, the change in the pressure difference at the nozzle position is the same as the change in the pressure difference inside the sealing cavity groove. There is a sealing relationship between the sealing gland and the diaphragm group. When the pressure inside the sealing gland changes, the diaphragm group will move up and down, thereby pressing on the valve core or moving away from the valve core. Among them, when pressing on the valve core, the high-pressure air in the air path below the valve core will flow out through the gap between the valve core and the sealing piece and flow to the bellows. When moving away from the valve core, the valve core will separate from the diaphragm group, and the pressure relief hole in the diaphragm group will discharge the air in the bellows. At this time, the pressure inside the bellows will be sent to the positioner connected to the large container, and the positioner will decide whether to relieve pressure or supplement pressure for the large container according to the feedback signal of the pneumatic PI operation function integration device.

[0024] According to the following detailed description of the exemplary embodiments with reference to the accompanying drawings, other features and aspects of the present application will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings included in the specification and constituting a part of the specification, together with the specification, illustrate the exemplary embodiments, features and aspects of the present application, and are used to explain the principles of the present application.

[0026] Figure 1 Schematic structural diagram of the pneumatic PI operation function integration device according to the embodiments of the present application;

[0027] Figure 2 Overall exploded view of the pneumatic PI operation function integration device according to the embodiments of the present application;

[0028] Figure 3 Front exploded view of the pneumatic PI operation function integration device according to the embodiments of the present application;

[0029] Figure 4 Top exploded view of the pneumatic PI operation function integration device according to the embodiments of the present application;

[0030] Figure 5 Schematic diagram of the bottom plate of the pneumatic PI operation function integration device according to the embodiments of the present application;

[0031] Figure 6 Schematic diagram of the baffle of the pneumatic PI operation function integration device according to the embodiment of the present application;

[0032] Figure 7 Schematic diagram of the nozzle of the pneumatic PI operation function integration device according to the embodiment of the present application. Detailed implementation manners

[0033] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0034] Among them, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention or simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0036] The special term "exemplary" here means "serving as an example, embodiment or illustration". Any embodiment described as "exemplary" here need not be construed as superior to or better than other embodiments.

[0037] In addition, in order to better illustrate the present application, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present application can also be implemented without some specific details. In some instances, methods, means, elements and circuits well known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0038] Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4, the pneumatic PI operation function integration device of the embodiment of the present application includes: a pneumatic module 100, a conical spring 2600, a valve core 2500, a sealing piece 2400, a triangular conical spring 2300, a diaphragm group 2200, a sealing gland 2100, a bellows 1230, a comparison bellows 1210, a baffle 1100 and a nozzle 1400. A sealing cavity groove is provided on one side of the pneumatic module 100. The sealing cavity groove is used to connect to a first air source to provide air source for the sealing cavity groove. A communicating ventilation cavity groove is provided at the bottom of the sealing cavity groove. The ventilation cavity groove is connected to a second air source to provide a second air source for the ventilation cavity groove. The conical spring 2600 is sleeved outside the valve core 2500 and is arranged inside the ventilation cavity groove. The sealing piece 2400 is arranged at the bottom of the sealing cavity groove to seal the ventilation cavity groove. A through mounting hole is provided on the plate surface of the sealing piece 2400. The top of the valve core 2500 passes through the mounting hole and is located inside the sealing cavity groove. The diaphragm group 2200 and the triangular conical spring 2300 are arranged inside the sealing cavity, and the triangular conical spring 2300 abuts against the sealing piece 2400 and the diaphragm group 2200 respectively. The sealing gland 2100 seals the cavity groove, and there is a preset distance between the sealing gland 2100 and the diaphragm group 2200. The bellows 1230 and the comparison bellows 1210 are arranged on one side of the pneumatic module 100. The bellows 1230 is used to connect to a pressure vessel, and the comparison bellows 1210 is used to connect to the gas transformer of the container to be detected. The baffle 1100 is arranged at the telescopic ends of the bellows 1230 and the comparison bellows 1210 and can tilt with the telescopic movement of the comparison bellows 1230. The nozzle 1400 is arranged on the baffle 1100, and the nozzle 1400 is communicated with the inside of the sealing cavity groove, and the spraying direction is towards the baffle 1100.

[0039] In this embodiment, between the bottom plate 1800 and the baffle 1100 of the pneumatic module 100, a comparison bellows 1210 and a bellows 1230 are provided. The bottom plate 1800 and the baffle 1100 are connected by a universal spring seat 1900 and bolt connection. One end of the ejector rod 1500 abuts against the bottom plate 1800, and the other end is connected to the nozzle 1400 by a thread. When the pressure in one or several bellows changes, the length of the bellows also changes, which will drive the upper plate to have a spatial displacement. After the upper plate generates a displacement, it will drive the ejector rod 1500 to fluctuate. After the ejector rod 1500 fluctuates, it will drive the change in the distance between the nozzle 1400 and the baffle 1100. Since the nozzle 1400 is internally connected to the sealed cavity groove, the pressure difference change at the position of the nozzle 1400 is the same as the pressure difference change inside the sealed cavity groove. There is a sealed relationship between the seal gland 2100 and the diaphragm group 2200. When the pressure inside the seal gland 2100 changes, the diaphragm group 2200 will have an up-and-down displacement, thereby pressing against the valve core 2500 or moving away from the valve core 2500. Among them, when pressing against the valve core 2500, the high-pressure air in the lower air path of the valve core 2500 will flow out through the gap between the valve core 2500 and the sealing piece 2400 and flow to the bellows. When moving away from the valve core 2500, the valve core 2500 will be separated from the diaphragm group 2200, and the pressure relief hole in the diaphragm group 2200 will discharge the air in the bellows. At this time, the pressure inside the bellows will be sent to the positioner connected to the large container. The positioner decides whether to relieve pressure or replenish pressure for the large container according to the feedback signal of the pneumatic PI operation function integration device.

[0040] Among them, the pressure change in the seal gland 2100 is related to the distance between the nozzle 1400 and the baffle 1100. The bellows is a high-precision sensitive bellows. After the air path is normally connected, according to the different pressures received by the bellows, the lengths of the bellows will also change, thereby driving the movement of the nozzle 1400 baffle 1100 mechanism to achieve the expected output pressure.

[0041] Among them, there is also a cavity between the valve core 2500 and the diaphragm group 2200, and this cavity is connected to the bellows. Then, the entry of high-pressure air below the valve core 2500 and the exhaust of the diaphragm group 2200 are both for this cavity. The change in the internal pressure of the bellows connected to this cavity will cause a change in length, and the change in length will affect the pressure inside the bellows again until balance.

[0042] Among them, the pneumatic PI operation function integration device as a whole is a pure mechanical structure, does not connect to a power supply, and can be used in a flammable environment.

[0043] In this embodiment, the gas source pressure of the second gas source is greater than that of the first gas source. When the diaphragm group 2200 presses against the valve core 2500, the high-pressure air in the lower air passage of the valve core 2500 will flow out through the gap between the valve core 2500 and the sealing piece 2400, flow towards the bellows, and send this gas to the gas controller, so that the gas controller can obtain whether the pressure inside the large container meets the requirements and whether to supplement or release air from the large container.

[0044] In a specific embodiment, refer to Figure 3 , further comprising: a bottom plate 1800 and a tension-compression spring. The bottom plate 1800 is arranged on one side of the pneumatic module 100, and the bellows 1230 and the comparison bellows 1210 are arranged on the bottom plate 1800. One end of the tension-compression spring is connected to the bottom plate 1800, and the other end is connected to the baffle 1100. There are more than two tension-compression springs, which are arranged at intervals along the edge position of the bottom plate 1800, and the elastic force of the tension-compression spring is less than that of the comparison bellows 1210.

[0045] In this embodiment, there are four tension-compression springs, which are arranged along the corner positions of the square-structured baffle 1100 and the square-structured bottom plate 1800, and the bellows 1230 and the comparison bellows 1210 are arranged between the four tension-compression springs. The tension-compression springs provide tension and pressure for the four corner positions of the baffle 1100. When the comparison bellows 1210 expands and contracts, the tension-compression springs can pull or press the corner positions of the baffle 1100, only causing the baffle 1100 to tilt relative to the bottom plate 1800.

[0046] In this embodiment, the bottom plate 1800 is arranged on one side of the pneumatic module 100, and is used to provide an installation position for the tension-compression spring, the bellows 1230 and the comparison bellows 1210. By respectively opening slots on the plate surface of the bottom plate 1800 for installing the tension-compression spring and the bellows, the tension-compression spring and the bellows can be arranged between the baffle 1100 and the bottom plate 1800.

[0047] Embodiment 1

[0048] The bellows 1230 is connected to the gas source. The pressure of the gas source is the same as that of the large container. In contrast, the bellows 1210 is connected to the gas transformer of the large container, receives the gas inside the large container, and obtains the pressure inside the large container. When the comparative document receives the gas with the same pressure inside the large container, when the pressure is compared with that of the bellows 1230, elongation, no change, and retraction will occur. At this time, the comparative bellows 1210 drives the baffle 1100 to tilt relative to the bottom plate 1800, changing the relative distance between the nozzle 1400 and the baffle 1100, and changing the pressure difference at the position of the nozzle 1400 and the pressure difference inside the sealed cavity groove communicated with the nozzle 1400. When the pressure inside the seal gland 2100 changes, the diaphragm group 2200 will move up and down, thus pressing on the valve core 2500 or moving away from the valve core 2500. When pressing on the valve core 2500, the high-pressure air in the lower air path of the valve core 2500 will flow out through the gap between the valve core 2500 and the sealing piece 2400, sending a gas signal to the gas controller. When moving away from the valve core 2500, the valve core 2500 will separate from the diaphragm group 2200, and the pressure relief hole in the diaphragm group 2200 will discharge the air in the bellows, also sending a gas signal to the gas controller.

[0049] Among them, there are four tension and compression springs, which are arranged along the corner positions of the square structure baffle 1100 and the square structure bottom plate 1800, and the bellows 1230 and the comparative bellows 1210 are arranged between the four tension and compression springs. The tension and compression springs provide tension and pressure for the four corner positions of the baffle 1100. When the comparative bellows 1210 expands and contracts, the tension and compression springs can pull or press the corner positions of the baffle 1100, only causing the baffle 1100 to tilt relative to the bottom plate 1800 due to the expansion and contraction of the comparative bellows 1210.

[0050] In a specific embodiment, referring to Figure 3 , it further includes: a nozzle fixing member 1700, and the nozzle fixing member 1700 is used to install the nozzle 1400 on the plate surface of the baffle 1100. Among them, the nozzle fixing member 1700 is rotatably arranged on the baffle 1100. The end of the nozzle 1400 is bolted to the nozzle fixing member 1700, and the ejector rod 1500 of the nozzle 1400 passes through the connecting groove and abuts against the bottom plate 1800. Since the nozzle 1400 is a long strip structure, even if the end of the nozzle 1400 is connected to the nozzle fixing member 1700, when the nozzle at the top of the nozzle 1400 ejects gas, the distance between the nozzle 1400 and the baffle 1100 can also change.

[0051] In this embodiment, the nozzle fixing member 1700 is used to mount the nozzle 1400 on the plate surface of the baffle 1100, and at the same time, it can rotate relative to the plate surface of the baffle 1100 on the side away from the bottom plate 1800. The nozzle fixing member 1700 is an annular plate-like structure, and gear teeth are provided at the outer edge position, which can engage and rotate with the gear teeth provided on the baffle 1100. The end of the nozzle 1400 is bolted to the nozzle fixing member 1700, and the top end of the nozzle 1400 is bolted to the ejector rod 1500 and inserted into the arc-shaped connection groove opened on the baffle 1100. When the baffle 1100 is tilted, the distance between the nozzle 1400 and the baffle 1100 changes.

[0052] Embodiment 2

[0053] Refer to Figure 3 , the bellows 1230 is connected to the gas source, and the pressure of the gas source is the same as the pressure of the large container. The comparison bellows 1210 is connected to the gas transformer of the large container, receives the gas inside the large container, and obtains the pressure inside the large container. When the comparison document receives the gas with the same pressure inside the large container, the pressure is compared with the bellows 1230, and elongation, no change, and retraction will occur. At this time, the comparison bellows 1210 drives the baffle 1100 to tilt relative to the bottom plate 1800, changing the relative distance between the nozzle 1400 and the baffle 1100, and changing the pressure difference at the position of the nozzle 1400 and the pressure difference inside the sealed cavity groove communicated with the nozzle 1400. When the pressure inside the seal gland 2100 changes, the diaphragm group 2200 will move up and down, thus pressing on the valve core 2500 or moving away from the valve core 2500. When pressing on the valve core 2500, the high-pressure air in the lower air path of the valve core 2500 will flow out through the gap between the valve core 2500 and the sealing piece 2400, sending a gas signal to the gas controller. When moving away from the valve core 2500, the valve core 2500 will be separated from the diaphragm group 2200, and the pressure relief hole in the diaphragm group 2200 will discharge the air in the bellows, also sending a gas signal to the gas controller.

[0054] Among them, when the plate surface of the baffle 1100 is tilted due to the expansion and contraction of the comparison bellows 1210, the distance between the baffle 1100 and the nozzle 1400 will change. At this time, due to the tilting movement of the baffle 1100, the ejector rod 1500 of the nozzle 1400 will move up and down relative to the inside of the connection groove opened on the baffle 1100 and move along the opening direction of the connection groove, avoiding excessive pressure on the nozzle 1400 and damage.

[0055] In a specific embodiment, it further includes: a universal spring seat 1900, which is arranged on the bottom plate 1800 and is fixedly connected to the center position of the bottom plate 1800 and the center position of the baffle 1100 at both ends.

[0056] In this embodiment, by adding a universal spring seat 1900, the baffle 1100 can only tilt relative to the bottom plate 1800 and cannot move up and down.

[0057] Embodiment 3

[0058] Refer to Figure 1 、 Figure 2 and Figure 3 As shown in FIGS. and, the bellows 1230 is connected to a gas source, and the pressure of the gas source is the same as the pressure of the large container. The comparison bellows 1210 is connected to the gas transformer of the large container, receives the gas inside the large container, and obtains the pressure inside the large container. When the comparison document receives the gas with the same pressure inside the large container, the pressure is compared with that of the bellows 1230, and elongation, no change, or retraction will occur. At this time, the comparison bellows 1210 drives the baffle 1100 to tilt relative to the bottom plate 1800, changing the relative distance between the nozzle 1400 and the baffle 1100, and changing the pressure difference at the position of the nozzle 1400 and the pressure difference inside the sealed cavity groove communicated with the nozzle 1400. When the pressure inside the seal gland 2100 changes, the diaphragm group 2200 will move up and down, thereby pressing on the valve core 2500 or moving away from the valve core 2500. When pressing on the valve core 2500, the high-pressure air in the lower air passage of the valve core 2500 will flow out through the gap between the valve core 2500 and the sealing piece 2400, sending a gas signal to the gas controller. When moving away from the valve core 2500, the valve core 2500 will separate from the diaphragm group 2200, and the pressure relief hole in the diaphragm group 2200 will discharge the air in the bellows, also sending a gas signal to the gas controller.

[0059] Among them, when the comparison bellows l210 causes the baffle 1100 to tilt, since a universal spring seat 1900 is provided between the baffle 1100 and the bottom plate 1800, the baffle can tilt with the expansion and contraction of the comparison bellows 1210. With the cooperation of the universal spring seat 1900 and the tension and compression spring, the baffle 1100 can only make a tilting movement, so that the distance between the baffle 1100 and the nozzle of the nozzle 1400 changes.

[0060] In a specific embodiment, refer to Figure 1 、 Figure 2 and Figure 3 As shown in FIGS.,, and, the bellows 1230 and the comparison bellows 1210 are symmetrically arranged with respect to the plate surface of the baffle 1100, ensuring that after the comparison bellows 1210 is compared with the bellows 1230, the length of the bellows 1230 remains unchanged, and the comparison bellows 1210 with a changing length can drive the baffle 1100 to tilt.

[0061] In a specific embodiment, refer to Figure 1 、 Figure 2 and Figure 4The sealing gland 2100 is a square structure with a hollow interior and an open bottom. The open side of the sealing gland 2100 is pressed against the top of the sealing cavity groove, and the internal space of the sealing gland 2100 matches the diaphragm group 2200. In this way, the sealing gland 2100 can be placed on the top of the sealing cavity groove by bolting to seal it. When the diaphragm group 2200 rises inside the sealing cavity groove to the inside of the sealing gland 2100, it can be sealed and fill the sealing gland 2100.

[0062] In one embodiment, see Figure 1 、 Figure 2 and Figure 4 The sidewall of the sealing gland 2100 is provided with an air bleed hole, located on the side of the opening of the sealing gland 2100. The sidewall of the diaphragm assembly 2200 is provided with an air outlet hole, which is connected to the bottom of the diaphragm assembly 2200. When the top of the diaphragm assembly 2200 abuts the inner sidewall of the sealing gland 2100, the air outlet hole and the air bleed hole correspond and connect. When the diaphragm assembly 2200 moves away from the valve core 2500, the valve core 2500 separates from the diaphragm assembly 2200, and gas enters through the bottom opening of the diaphragm assembly 2200. It is then discharged through the air outlet hole on the sidewall of the diaphragm assembly 2200 and the air outlet hole corresponding to the air outlet hole, thereby releasing the air in the bellows.

[0063] Among them, when the distance between the nozzle of the nozzle 1400 and the baffle 1100 decreases, the pressure inside the nozzle 1400 and the sealing cavity groove increases, and the diaphragm group 2200 will move toward the ventilation cavity groove, so that the diaphragm group 2200 presses on the valve core 2500 to connect the sealing cavity groove and the ventilation cavity groove. At this time, the first gas source and the second gas source both enter the interior of the sealing cavity groove to increase the internal pressure.

[0064] Among them, when the distance between the nozzle of the nozzle 1400 and the baffle 1100 increases, the pressure inside the nozzle 1400 and the sealing cavity groove decreases, and the diaphragm group 2200 will move in the direction away from the ventilation cavity groove, so that the diaphragm group 2200 is away from the valve core 2500 sealing ventilation cavity groove and the sealing cavity groove. At this time, only the first air source enters the interior of the sealing cavity groove, reducing the internal pressure.

[0065] In one embodiment, see Figure 1 、 Figure 2 and Figure 3 A blocking portion is extended from the relative edge position on one side of the pneumatic module 100. The blocking portion is a plate-shaped structure and is located on both sides of the base plate 1800. It can protect the contrast bellows 1210, the tension and compression springs and the universal spring seat 1900 located between the two blocking portions. The extension length of the blocking portion is less than the spacing distance between the base plate 1800 and the baffle 1100, so that the baffle 1100 can be tilted relative to the base plate 1800.

[0066] In a specific embodiment, referring to Figure 5 and Figure 6 , the bottom plate 1800 and the baffle 1100 are provided with corresponding bellows mounting holes 1110. The vertically corresponding bellows mounting holes can be used to install the comparison bellows 1210 and the bellows 1230.

[0067] Among them, referring to Figure 4 and Figure 7 , the triangular spring is arranged between the sealing piece 2400 and the diaphragm group 2200, and always gives the diaphragm group 2200 an elastic force away from the sealing piece 2400. Only when the spacing between the nozzle 1400 and the baffle 1100 increases, the pressure inside the sealed cavity groove increases, pressing the diaphragm group 2200 to move towards the ventilation cavity groove direction against the elastic force of the triangular spring.

[0068] In a specific embodiment, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , it further includes: a feedback comparison bellows 1240 and a feedback bellows 1220. The feedback comparison bellows 1240 and the feedback bellows 1220 are both arranged between the bottom plate 1800 and the baffle 1100, and the connection line of the feedback comparison bellows 1240 and the feedback bellows 1220 intersects with the connection line of the comparison bellows 1210 and the bellows 1230.

[0069] In this embodiment, the feedback comparison bellows 1240 is internally connected to the sealed cavity groove, the feedback bellows 1220 is connected to the gas source, and the gas source connected to the feedback bellows 1220 is the same as the gas source connected to the feedback comparison bellows 1240. Among them, the feedback comparison bellows 1240 will receive the gas pressure inside the sealed cavity groove, and expand and contract according to the gas pressure inside the sealed cavity groove, driving the baffle 1100 to tilt relative to the bottom plate 1800, so that the spacing between the nozzle 1400 and the baffle 1100 changes, and further changing the internal pressure of the sealed cavity groove, cooperating with the comparison bellows 1210 and the bellows 1230 to reciprocally regulate the spacing between the baffle 1100 and the nozzle 1400, so that the internal pressure of the comparison bellows 1210 is the same as the internal pressure of the bellows 1230, and the internal pressure of the feedback comparison bellows 1240 is the same as the internal pressure of the feedback comparison bellows 1230. At this time, the internal pressure of the large container can be the same as the conforming pressure.

[0070] Embodiment 4

[0071] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4, the bellows 1230 is connected to the gas source, and the pressure of the gas source is the same as that of the large container. The comparison bellows 1210 is connected to the gas transformer of the large container, receives the gas inside the large container, and obtains the pressure inside the large container. When the comparison document receives the gas with the same pressure inside the large container, and the pressure is compared with that of the bellows 1230, elongation, no change, and retraction will occur. At this time, the comparison bellows 1210 drives the baffle 1100 to tilt relative to the bottom plate 1800, changing the relative distance between the nozzle 1400 and the baffle 1100, and changing the pressure difference at the position of the nozzle 1400 and the pressure difference inside the sealed cavity groove communicated with the nozzle 1400. When the pressure inside the seal gland 2100 changes, the diaphragm group 2200 will move up and down, thus pressing on the valve core 2500 or moving away from the valve core 2500. When pressing on the valve core 2500, the high-pressure air in the lower air path of the valve core 2500 will flow out through the gap between the valve core 2500 and the seal piece 2400, sending a gas signal to the gas controller. When moving away from the valve core 2500, the valve core 2500 will separate from the diaphragm group 2200, and the pressure relief hole in the diaphragm group 2200 will discharge the air in the bellows, also sending a gas signal to the gas controller.

[0072] Among them, when pressing on the valve core 2500, the high-pressure air in the valve core 2500 communicating with the second gas source will flow out through the gap between the valve core 2500 and the seal piece 2400 and flow to the feedback comparison bellows 1240. At this time, the feedback comparison bellows 1240 will compare with the feedback bellows 1220 according to the inflowing high-pressure air, adjust the tilting direction of the baffle 1100 and the spacing distance between the baffle 1100 and the nozzle 1400, and further adjust the pressure change inside the sealed cavity groove. Through the continuous adjustment of the feedback comparison bellows 1240 and the comparison bellows 1210, the pressure inside the sealed cavity installation groove can finally be adjusted to be the same as the pressure inside the large container.

[0073] It should be noted that the feedback comparison bellows 1240 is a feedback on the tilting movement of the baffle 1100 driven by the comparison bellows 1210, and then a feedback on the information of the comparison bellows 1210 this time.

[0074] The above has described the embodiments of the present application. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technologies in the market, or to enable other ordinary technical personnel in the technical field to understand the disclosed embodiments.

Claims

1. A pneumatic PI operation function integrated device, characterized in that, Comprising: A pneumatic module, a conical spring, a valve core, a sealing piece, a triangular conical spring, a diaphragm group, a sealing gland, a bellows, a comparison bellows, a baffle and a nozzle; One side of the pneumatic module is provided with a sealed cavity groove, which is suitable for connecting a first air source. A communicated ventilation cavity groove is provided at the bottom of the sealed cavity groove, which is suitable for connecting a second air source. The conical spring is sleeved outside the valve core and arranged inside the ventilation cavity groove. The sealing piece is arranged at the bottom of the sealed cavity groove to seal the ventilation cavity groove, and a through mounting hole is provided on the plate surface of the sealing piece. The top of the valve core passes through the mounting hole and is located inside the sealed cavity groove. The diaphragm group and the triangular conical spring are arranged inside the sealed cavity, and the triangular conical spring abuts against the sealing piece and the diaphragm group respectively. The sealing gland seals the sealed cavity groove, and there is a preset distance between the sealing gland and the diaphragm group; The bellows and the comparison bellows are arranged on one side of the pneumatic module. The bellows is suitable for connecting a pressure vessel, and the comparison bellows is suitable for connecting a gas transformer of a container to be detected. The baffle is arranged at the telescopic ends of the bellows and the comparison bellows and can tilt with the telescopic movement of the comparison bellows. The nozzle is arranged on the baffle, and the nozzle communicates with the inside of the sealed cavity groove, and the spraying direction is towards the baffle; The bellows and the comparison bellows are symmetrically arranged with respect to the plate surface of the baffle; The sealing gland is a square structure with a hollow interior and an open bottom. The open side of the sealing gland is pressed on the top of the sealed cavity groove, and the internal space of the sealing gland matches the diaphragm group.

2. The pneumatic PI operation function integrated device according to claim 1, wherein The air source pressure of the second air source is greater than the air source pressure of the first air source.

3. The pneumatic PI operation function integration device according to claim 1, wherein Further comprising: A bottom plate and a tension and compression spring; The bottom plate is arranged on one side of the pneumatic module, and the bellows and the comparison bellows are arranged on the bottom plate; One end of the tension and compression spring is connected to the bottom plate, and the other end is connected to the baffle. There are two or more tension and compression springs, which are arranged at intervals along the edge position of the bottom plate, and the elastic force of the tension and compression spring is less than the elastic force of the comparison bellows.

4. The pneumatic PI operation function integration device according to claim 3, characterized in that Further comprising: A nozzle fixing member; A connecting groove is provided on the plate surface of the baffle, and the cross section of the connecting groove is arc-shaped; The nozzle fixing member is rotatably arranged on the baffle. The end of the nozzle is connected to the nozzle fixing member, and the top rod provided at the top passes through the connecting groove and abuts against the bottom plate.

5. The pneumatic PI operation function integration device according to claim 3, characterized in that Further comprising: A universal spring seat; The universal spring seat is arranged on the bottom plate, and the two ends are respectively fixedly connected to the central position of the bottom plate and the central position of the baffle.

6. The pneumatic PI operation function integration device according to claim 1, characterized in that, A vent hole is provided on the side wall of the sealing gland, and the vent hole is located on the open side of the sealing gland; An air outlet hole is provided on the side wall of the diaphragm group, which communicates to the bottom of the diaphragm group. When the top of the diaphragm group abuts against the inner side wall of the sealing gland, the air outlet hole corresponds to and communicates with the vent hole.

7. The pneumatic PI operation function integrated device according to claim 5, characterized in that, Blocking portions extend from opposite edge positions on one side of the pneumatic module. The blocking portions are plate-shaped structures located on both sides of the bottom plate, and the extension length of the blocking portions is less than the spacing distance between the bottom plate and the baffle plate.

8. The pneumatic PI operation function integration device according to claim 3, characterized in that, The bottom plate and the baffle plate are provided with corresponding bellows mounting holes.

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