CN118959639A

CN118959639A - Diaphragm valve assembly and control system with pressure passive intervention function

Info

Publication number: CN118959639A
Application number: CN202411457050.2A
Authority: CN
Inventors: 巴云峰; 王芳; 余燕鑫
Original assignee: Zhejiang Hippak Fluid Control Co ltd
Current assignee: Zhejiang Hippak Fluid Control Co ltd
Priority date: 2024-10-18
Filing date: 2024-10-18
Publication date: 2024-11-15
Anticipated expiration: 2044-10-18
Also published as: CN118959639B

Abstract

The present invention discloses a diaphragm valve assembly and a control system with a pressure passive intervention function, which relates to the technical field of diaphragm valves. Based on the operating principle of a conventional diaphragm valve, two pressurized/released cavities are added to the valve core structure without affecting normal use. Specifically, the active movement process of the valve core structure is controlled in a pneumatic form, and the pressure state in the medium flow process is coordinated to "actively intervene" in the movement process of the valve core structure. During this process, the force generated by the high fluctuating pressure difference or high pressure borne by the release cavity can act reversely on the pressurized cavity. The purpose is to reduce the deformation degree of the rubber jacket at the corresponding release cavity, and avoid the influence of the over-stroke deformation or multiple deformation processes of the rubber jacket's own resilience due to the change of medium pressure. Based on the above content, a targeted control system is set in the overall solution to coordinate control or adjustment with active parameters and passive parameters.

Description

Diaphragm valve assembly with pressure passive intervention function and control system

Technical Field

The invention relates to the technical field of diaphragm valves, in particular to a diaphragm valve assembly with a pressure passive intervention function and a control system.

Background

The diaphragm valve is similar to the conventional valve body structure, the principle of the diaphragm valve is referred to as the related content disclosed in CN113167394A, the diaphragm with elastic capability is used for replacing the conventional valve core structure, and the advantages are relatively outstanding, and the diaphragm valve is mainly used for meeting the flow regulation requirement of corrosive/toxic media.

It should be noted that: the diaphragm valve has the advantages of obvious 'shortcomings' aiming at the use requirement of large medium pressure fluctuation, and the diaphragm valve is specifically expressed as follows: the diaphragm piece carries out deformation removal many times, and deformation moving amount also can have great fluctuation, if: when the diaphragm member is subjected to impact of a high-pressure medium, the diaphragm member is subjected to repeated overstroke deformation movement, the toughness and the ductility of the diaphragm member are changed, and particularly, the diaphragm member is difficult to reset normally under the influence of pressure and temperature double factors for the high-temperature high-pressure medium, even the diaphragm member is fragile and cracked, and the problem of internal leakage exists in the valve body;

For which the application proposes a solution.

Disclosure of Invention

The invention aims to provide a diaphragm valve assembly with a pressure passive intervention function and a control system, aiming at the operation principle of a diaphragm valve, when the flow regulation requirement of corrosive/toxic media at high temperature/high pressure is met, the diaphragm part can generate a plurality of over-stroke deformation moving processes, so that the physical characteristics of the diaphragm part are changed, even the problem of embrittlement cracking occurs, and finally, the valve body has an internal leakage problem.

The aim of the invention can be achieved by the following technical scheme: the diaphragm valve assembly with the pressure passive intervention function comprises a valve body and an air pump group, wherein a medium flow channel is formed in the valve body, an air bin sleeve is arranged above the outer wall of the valve body, and a working assembly corresponding to the medium flow channel is arranged in the air bin sleeve;

the working assembly comprises a valve rod, a rubber sleeve, a piston plate and an inner valve core, wherein the valve rod penetrates downwards to the central position of the medium flow channel, the lower end position of the valve rod is connected with the inner valve core, the rubber sleeve is arranged at the outer wall position of the inner valve core, and the outer wall of the rubber sleeve is matched with the outer wall position of the central position of the medium flow channel;

the piston plate is arranged at the outer position of the valve rod, the piston plate is matched with the inner wall of the air bin sleeve, the air bin sleeve is provided with an air jacket group corresponding to the air pump group, the valve rod is provided with an air flow channel in the inner position corresponding to the lower side of the piston plate, and an upper air leakage port and a lower air leakage port which are communicated with the air flow channel are formed in the valve rod along the direction from top to bottom.

Further provided is that: the inside of the air bin sleeve is divided into an upper air bin and a lower air bin which are arranged from top to bottom by a piston plate, and the arrangement position of the air sleeve group corresponds to the arrangement position of the upper air bin and the lower air bin.

Further provided is that: the displacement sensor is arranged at the upper end position outside the gas bin sleeve, and the tail end position of the transmission rod of the displacement sensor is fixedly connected with the top end position of the valve rod.

Further provided is that: the cross section of the medium flow passage central point position is vertical oval and is set as a dispatching cavity, the length of the rubber jacket along the vertical direction is smaller than that of the dispatching cavity along the vertical direction, and the positions of the dispatching cavity corresponding to the upper side and the lower side of the rubber jacket are all set as buffer cavities.

Further provided is that: the middle section of the rubber sleeve is cylindrical, the inner valve core is cylindrical and is matched with the middle section of the rubber sleeve, and a pressure cavity and a pressure release cavity are respectively formed in the positions of the upper side and the lower side of the inner valve core along the inner side of the rubber sleeve.

Further provided is that: the lower end of the valve rod is flush with the lower surface of the inner valve core, the lower end of the valve rod is open through the air flow channel and is communicated with the inside of the pressure-releasing cavity, the upper air leakage port is communicated with the inside of the lower air bin, and the lower air leakage port is communicated with the inside of the pressure-bearing cavity.

A control system for a diaphragm valve assembly with a pressure passive intervention function, said control system being associated to the operation of a displacement sensor and a gas pump set, comprising in particular the steps of:

step one: the control system comprises a data integration unit, a data interaction analysis unit and an interaction action unit, wherein the data integration unit is used for recording passive parameters of the displacement sensor and active parameters in the air pump set and inputting the passive parameters and the active parameters into the data interaction analysis unit;

Step two: performing an active action analysis process related to the medium flow process in the valve body based on the passive parameters and the active parameters in the data integration unit, performing the passive action analysis process on the active action analysis process by using the passive parameters, and obtaining a state progression in the medium flow process based on the passive action analysis process;

step three: the interaction unit is used for controlling the operation process of the gas pump set and adjusting the active parameters in the gas pump set according to the state progression and the medium flowing process.

The invention has the following beneficial effects:

1. The invention is based on the basic structure and operation principle of the conventional diaphragm valve, improves the valve core structure on the basis of not influencing the normal use of the valve, particularly forms the valve core structure by coating the inner valve core by a rubber jacket, realizes the effect of sealing/adjusting the opening degree by utilizing the self-elasticity of the rubber jacket, and is characterized in that: the setting positions of the inner valve core and the rubber jacket are improved to optimize the pressurized cavity and the pressure release cavity which are arranged up and down, the rubber jacket at the pressure release cavity is used as a direct part for directly bearing the change of the medium pressure, but the rubber jacket at the part can not directly generate larger overstroke deformation or polymorphic deformation, and particularly, the deformation degree of the rubber jacket at the pressure release cavity is reduced by carrying out 'active bearing' on the medium pressure corresponding to the rubber jacket at the pressure release cavity, so that the influence caused by overstroke deformation or multiple deformation processes due to the change of the medium pressure is avoided.

2. The description that is incorporated into the above is: in particular, a control system associated to the operation of the displacement sensor and the air pump group is added, the nature of the control system being a "passive intervention" mode, which is represented by: firstly, active parameters in the operation process of the air pump set are combined to passive parameters of the displacement sensor, and then two analysis processes are carried out, wherein the purpose of the method is that: according to the parameters in the running process of the valve body, the stability of the valve core structure is further stabilized by the mode of 'passive intervention' of active parameters in the air pump set on the basis of meeting the flow of media.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a diaphragm valve assembly with pressure passive intervention according to the present invention;

FIG. 2 is a cross-sectional view of FIG. 1 in a diaphragm valve assembly with pressure passive intervention in accordance with the present invention;

FIG. 3 is a cut-away view of a valve body in a diaphragm valve assembly with pressure passive intervention in accordance with the present invention;

FIG. 4 is a front view of FIG. 3 in a diaphragm valve assembly with pressure passive intervention in accordance with the present invention;

FIG. 5 is a cross-sectional view of the rubber housing of FIG. 3 in a diaphragm valve assembly with pressure passive intervention in accordance with the present invention;

FIG. 6 is a graph of the position relationship of FIG. 1 in a diaphragm valve assembly with pressure passive intervention according to the present invention;

FIG. 7 is a diagram showing the separation of the rubber jacket and the valve stem in the diaphragm valve assembly with the pressure passive intervention function.

In the figure: 1. a valve body; 2. a gas bin cover; 201. feeding an air bin; 202. discharging the gas from the gas bin; 3. an air jacket group; 4. a displacement sensor; 5. a piston plate; 6. a valve stem; 601. an upper gas discharge port; 602. a lower gas discharge port; 7. a media flow path; 701. a buffer cavity; 8. an inner valve core; 9. a rubber jacket; 901. a pressurized cavity; 902. the cavity is pressurized.

Detailed Description

The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Embodiment one: for the operation principle of the diaphragm valve, when the flow regulation requirement of corrosive/toxic medium at high temperature/high pressure is met, the diaphragm part can generate a plurality of over-stroke deformation moving processes, so that the physical characteristics of the diaphragm part are changed, even the problem of embrittlement and cracking occurs, and finally, the valve body has the internal leakage problem, and the following technical scheme is provided:

Referring to fig. 1-7, the diaphragm valve assembly with the pressure passive intervention function in the embodiment comprises a valve body 1 and an air pump group, wherein a medium flow channel 7 is formed in the valve body 1, an air bin sleeve 2 is arranged above the outer wall of the valve body 1, and a working assembly corresponding to the medium flow channel 7 is arranged in the air bin sleeve 2;

The working assembly comprises a valve rod 6, a rubber jacket 9, a piston plate 5 and an inner valve core 8, wherein the valve rod 6 penetrates downwards to the central position of the medium flow channel 7, the lower end position of the valve rod 6 is connected with the inner valve core 8, the rubber jacket 9 is arranged at the outer wall position of the inner valve core 8, and the outer wall of the rubber jacket 9 is matched with the outer wall position of the central position of the medium flow channel 7;

the piston plate 5 is installed on the outside position that valve rod 6 is located gas storehouse cover 2, and phase-match between piston plate 5 and the gas storehouse cover 2 inner wall is provided with the gas cover group 3 that corresponds the gas pump group on the gas storehouse cover 2, be provided with the air flow path in the inside position that valve rod 6 corresponds the piston plate 5 downside, and valve rod 6 has seted up the last bleeder 601 and the lower bleeder 602 of intercommunication air flow path along the direction from the top down, the interior last gas storehouse 201 and the lower gas storehouse 202 that separate for the top down setting with piston plate 5 of gas storehouse cover 2, the setting position of gas cover group 3 corresponds with the setting position of last gas storehouse 201 and lower gas storehouse 202.

Working principle: the diaphragm valve has a relatively simple internal structure, and only needs to be noted that the rubber jacket 9 needs to completely cover the inner valve core 8, the rubber jacket 9 has the characteristic of high corrosion resistance, and the structural surface contacted with a medium cannot be made of metal materials, so that the diaphragm valve is relatively similar to the conventional diaphragm valve in structure;

But in connection with fig. 2 it is to be explained that: when the medium enters from the left side of the valve body 1, the rubber jacket 9 completely covers the inner valve core 8 and is completely blocked at the center point of the medium flow channel 7, so that the medium flow channel is in a completely sealed state; on the contrary, when the inner valve core 8 moves upwards for a certain distance through the valve rod 6, a gap exists between the lower part of the rubber sleeve 9 and the medium flow channel 7, so that the movement state that the inside of the valve body 1 is in a small opening degree can be represented, and the opening degree can be increased along with the increase of the upward moving distance of the inner valve core 8;

what needs to be further explained is: in connection with the pressure relief cavity 902 of fig. 2 and 6, it can be appreciated that: when the medium flows in the medium flow channel 7, because the pressure release cavity 902 is hollow, the hydraulic pressure/air pressure of the medium can directly act on the rubber jacket 9 corresponding to the pressure release cavity 902, so that the rubber jacket 9 at the position generates larger or smaller deformation process, and the opening of the valve body 1 can be further increased.

Embodiment two: the specific operation details of the working components are described in the embodiment:

The cross section of medium runner 7 central point position is vertical oval and set up to dispatch cavity, the length of rubber overcoat 9 along vertical direction is less than the length of dispatch cavity along vertical direction, the position that the dispatch cavity corresponds the upper and lower both sides of rubber overcoat 9 all sets up to cushion cavity 701, rubber overcoat 9 middle section position is cylindrical, interior case 8 is cylindrical and with rubber overcoat 9 middle section partial phase-match, pressurized cavity 901 and pressurized cavity 902 have been seted up respectively in the upper and lower both sides position of interior valve core 8 in the inside edge of rubber overcoat 9, valve rod 6 lower extreme flushes with interior case 8 lower surface, and valve rod 6 lower extreme is the opening form through the air runner and communicates with the inside between the pressurized cavity 902, go up the bleeder 601 and the inside intercommunication of lower air warehouse 202, the intercommunication between lower gas leakage 602 and the pressurized cavity 901 is inside.

The scheme is as follows: firstly, it should be noted that in the present invention, the driving power source of the valve rod 6 is compressed gas, and the essence is that the air pump set injects compressed gas into the air chamber 2 through the air chamber set 3, but the difference is that: in order to drive the valve rod 6 to move upwards, the upper air bin 201 and the lower air bin 202 are combined to the arrangement positions of the upper air bin 201 and the lower air bin 202 in fig. 6, compressed air needs to be filled into the lower air bin 202 firstly, and the upper air bin 201 is in a synchronous air release state, so that the piston plate 5 generates upward thrust, and the inner valve core 8 is driven to move upwards, otherwise, when the inner valve core 8 is reset, compressed air is filled into the upper air bin 201;

But this embodiment further limits the internal structure of the inner valve element: when compressed gas is injected into the lower gas bin 202, the compressed gas also enters the gas flow channel through the upper gas discharge port 601, and then the compressed cavity 901 is inflated through the lower gas discharge port 602, and finally the pressure release cavity 902 is inflated, which aims at: when the inner valve core 8 starts to move upwards, the pressure release cavity 902 and the pressure receiving cavity 901 are inflated synchronously, and the inner part of the rubber jacket 9 is connected with the inner valve core 8, so that the rubber jacket 9 is ensured to be always and completely contacted with the structural surface at the center of the medium flow channel 7, and when the high pressure medium flow requirement is met, the situation that the high pressure medium directly impacts the rubber jacket 9, so that the actual opening of the valve body 1 is far greater than the preset opening is avoided;

For this purpose, the description of the coupling to the pressure release cavity 902 and the pressure receiving cavity 901 is given: when the rubber jacket 9 at the corresponding pressure release cavity 902 is subjected to a high pressure, further deformation occurs, which is expressed as: the internal volume thereof is reduced so that the gas inside thereof is firstly reversed into the pressurized cavity 901, causing the rubber jacket 9 at the corresponding pressurized cavity 901 to be further deformed, but the key is that the gas inside the pressurized cavity 902 is temporarily reversed into the lower gas chamber 202, and then the piston plate 5 is further subjected to upward thrust, causing the inner valve spool 8 to be further moved upward, and in this process, it is to be noted that:

Because the inner valve core 8 is aimed at the "active yielding" process of the high pressure medium, on one hand, because the opening of the medium flow channel is increased by further pressing the piston plate 5, on the other hand, the pressure born by the rubber jacket 9 at the corresponding pressed cavity 902 is also reduced, so that the deformation degree of the rubber jacket 9 at the position is also reduced, but the key is that:

Specifically, the pressurized cavity 901 is used to actively bear the high fluctuation pressure or high pressure which may occur at the pressure releasing cavity 902, and specifically, the cross section of the rubber jacket 9 matched to the center point position of the medium flow channel 7 is combined, and reference can be made to fig. 7, wherein the inner valve core 8 can be understood as the center point position of the medium flow channel which is completely blocked, so that the middle section position of the rubber jacket 9 is particularly set as a cylinder, and the buffer cavity 701 is only used as a working space when the rubber jacket 9 is matched to move, so as to buffer the rubber jacket 9.

Embodiment III: the operation system in the present embodiment is presented in combination with the first embodiment and the third embodiment:

A displacement sensor 4 is arranged at the upper end position outside the gas cartridge sleeve 2, and the tail end position of a transmission rod of the displacement sensor 4 is fixedly connected with the top end position of a valve rod 6;

the control system is associated with the operation process of the displacement sensor 4 and the air pump group, and specifically comprises the following steps:

Step one: the control system comprises a data integration unit, a data interaction analysis unit and an interaction action unit, wherein the data integration unit is used for recording passive parameters of the displacement sensor 4 and active parameters in the air pump group and inputting the passive parameters and the active parameters into the data interaction analysis unit;

Step two: an active action analysis process of correlating the medium flowing process in the valve body 1 is carried out based on passive parameters and active parameters in the data integration unit, the passive action analysis process is carried out on the active action analysis process by the passive parameters, and the state progression in the medium flowing process is obtained based on the passive action analysis process;

The scheme is as follows: the active parameters in the overall scheme mainly represent the gas quantity and the gas filling speed when the gas pump group fills the compressed gas into the lower gas bin 202, and are respectively represented as Qo and Vq, and the two parameters are taken as relative variables, specifically controlled according to the use requirements, for example: when the inner valve core 8 needs to be lifted upwards by a distance of L, an upward thrust is generated on the piston plate 5 by controlling the gas amount to move upwards by a distance of L, and the part is related to parameters such as the inner diameter, the inner surface area and the like of the gas cartridge 2, which is not described in the embodiment;

However, the passive parameter is described, the essence of the passive parameter is that the upward moving distance of the inner valve core 8 is recorded in real time through the displacement sensor 4, the displacement sensor 4 belongs to a passive structure, only corresponding values are generated when the valve rod 6 moves upwards/downwards when the gas is filled into the gas cartridge sleeve 2, the display value of the displacement sensor 4 is represented by Lt, and the moving speed of the inner valve core 8 is represented by Vt, so that Lt and Vt belong to the passive parameter;

The description of this in connection with the active action analysis process is: when the active action analysis process is indicated as normal medium flow, the inner valve core 8 is driven to move upwards by controlling the quantity of compressed gas injected into the gas cartridge sleeve 2, so that the medium flow channel 7 in the valve body 1 is in a small opening state or a large opening state, the upward movement distance of the valve rod 6 is calculated according to the parameters such as the inner diameter, the inner surface area and the like in the gas cartridge sleeve 2, and La is used for indicating the actual stroke of the inner valve core 6 in the active action analysis process; however, as shown in example two, the valve rod 6 moves up a small distance under the pressure of the medium, so that Lb is an additional moving distance of the valve rod 6, lb is an uncontrollable variable, and is specifically related to the hydraulic pressure/air pressure of the medium, and is described as follows:

S1: first, referring to La, if the inner valve core 8 and the rubber jacket 9 are not subjected to medium pressure, vt of the inner valve core 8 is directly related to Vq only, and if Vq is large, vt of the inner valve core 8 is also relatively increased;

s2: on the contrary, the moving speed to the inner valve core is further calculated based on Lb, because the moving speed of the inner valve core 8 is not equal to Vt due to the action of the medium pressure, so that the actual moving travel of the inner valve core is represented by Vb, on the basis of maintaining Vq constant, the state level is calculated by m= (Vb-Vt)/Vt, M represents the state level, and the state level is mainly used to represent the medium pressure to be applied to the rubber jacket 9 corresponding to the pressurized cavity 902, in order to avoid the deformation degree of the rubber jacket 9 being too large, the upper air chamber 201 is first supplemented, so that the inner valve core 8 moves Lb reversely and downwards, which is aimed at first maintaining the opening degree of the valve body 1, and then the state level needs to be further reduced, specifically expressed as: if the amount of gas in the active parameter is Qo, then the amount of gas needs to be readjusted later Specifically by changing Vb.

In connection with S1 and S2, it is theoretically necessary to reduce the gas stock in the lower gas chamber 202-gas flow path-pressurized cavity 901-pressurized cavity 902 on the basis of maintaining the return of the inner valve spool 8 to the actual opening degree, but the rubber jacket 9 corresponding to the pressurized cavity 902 is still in a state of being pressed in reality, but the critical deformation process is embodied in the rubber jacket 9 corresponding to the pressurized cavity 901, and is combined with fig. 6, because the rubber jacket 9 of this portion is not always contacted with the medium, and thus is less affected by the medium, which is summarized in that:

In a specific use process, in order to adapt to the pressure change of the medium, firstly, the position of the inner valve core 8 needs to be maintained stable to maintain the opening degree, secondly, the upper gas chamber 201 is supplemented with gas in a passive intervention mode, the lower gas chamber 202 reduces the gas filling speed, in the actual case, the gas stock in the lower gas chamber 202, the gas flow channel, the pressurized cavity 901 and the discharged cavity 902 does not change obviously, and the only change exists in that: the deformation process of the rubber jacket 9 which is in the corresponding pressure release cavity 902 and is supposed to bear is transferred to the rubber jacket 9 which is in the corresponding pressure release cavity 901, so that the rubber jacket 9 on the working surface (contacted with the medium) is prevented from generating larger rebound quantity change.

In summary, it is shown that: based on the operation principle of a conventional diaphragm valve, two cavities which are pressed/released are additionally arranged in the valve core structure on the basis of not affecting normal use, and the valve is specifically expressed as follows: the active moving process of the valve core structure is controlled in a pneumatic mode, and the active moving process is matched with the pressure state 'active intervention' in the medium flowing process to the moving process of the valve core structure, in the process, the stress generated by the high fluctuation pressure difference or the high pressure born by the pressure release cavity can be reversely acted in the pressure receiving cavity, and the purpose is that: the deformation degree of the rubber jacket at the corresponding pressure-releasing cavity is reduced, the influence of overstroke deformation or repeated deformation process caused by the rebound performance of the rubber jacket due to medium pressure change is avoided, and based on the above, a targeted control system is arranged in the whole scheme, so that the cooperative control or adjustment is carried out by using active parameters and passive parameters.

The foregoing is merely illustrative and explanatory of the invention, as it is well within the scope of the invention as claimed, as it relates to various modifications, additions and substitutions for those skilled in the art, without departing from the inventive concept and without departing from the scope of the invention as defined in the accompanying claims.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims

1. A diaphragm valve assembly with a pressure passive intervention function, comprising a valve body and an air pump group, characterized in that a medium flow channel is provided inside the valve body, and an air chamber sleeve is installed above the outer wall of the valve body, and a working component corresponding to the medium flow channel is provided in the air chamber sleeve;

The working assembly includes a valve stem, a rubber jacket, a piston plate and an inner valve core. The valve stem extends downward to the center of the medium flow channel, and the lower end of the valve stem is connected to the inner valve core. The rubber jacket is arranged on the outer wall of the inner valve core, and the outer wall of the rubber jacket matches the outer wall of the center of the medium flow channel.

The piston plate is installed on the valve stem at the external position of the air chamber sleeve, and the piston plate matches the inner wall of the air chamber sleeve. The air chamber sleeve is provided with an air sleeve group corresponding to the air pump group. The valve stem is provided with an air flow channel in the internal position on the lower side of the piston plate, and the valve stem is provided with an upper air discharge port and a lower air discharge port connecting the air flow channel in a direction from top to bottom.

2. The diaphragm valve assembly with passive pressure intervention function according to claim 1 is characterized in that the interior of the gas chamber sleeve is divided into an upper gas chamber and a lower gas chamber arranged from top to bottom by a piston plate, and the setting position of the gas sleeve group corresponds to the setting position of the upper gas chamber and the lower gas chamber.

3. The diaphragm valve assembly with passive pressure intervention function according to claim 2 is characterized in that a displacement sensor is installed at the external upper end position of the air chamber sleeve, and the end position of the transmission rod of the displacement sensor is fixedly connected to the top position of the valve stem.

4. The diaphragm valve assembly with passive pressure intervention function according to claim 1 is characterized in that the cross-section at the center point of the medium flow channel is vertically elliptical and is set as a scheduling cavity, the length of the rubber jacket along the vertical direction is smaller than the length of the scheduling cavity along the vertical direction, and the positions of the scheduling cavity corresponding to the upper and lower sides of the rubber jacket are set as buffer cavities.

5. The diaphragm valve assembly with passive pressure intervention function according to claim 1 is characterized in that the middle section of the rubber jacket is cylindrical, the inner valve core is cylindrical and matches the middle section of the rubber jacket, and a pressure-bearing cavity and a pressure-releasing cavity are respectively opened in the rubber jacket along the upper and lower sides of the inner valve core.

6. The diaphragm valve assembly with passive pressure intervention function according to claim 1 is characterized in that the lower end of the valve stem is flush with the lower surface of the inner valve core, and the lower end of the valve stem is open through the air flow channel and connected to the interior of the pressure release cavity, the upper air release port is connected to the interior of the lower air chamber, and the lower air release port is connected to the interior of the pressurized cavity.

7. A control system for a diaphragm valve assembly with a pressure passive intervention function, using the diaphragm valve assembly with a pressure passive intervention function as claimed in any one of claims 1 to 6, characterized in that the control system is associated with the operation process of the displacement sensor and the air pump group, and specifically comprises the following steps:

Step 1: The control system includes a data integration unit, a data interaction analysis unit and an interaction action unit, wherein the data integration unit is used to record the passive parameters of the displacement sensor and the active parameters in the air pump group, and input the passive parameters and the active parameters into the data interaction analysis unit;

Step 2: Based on the passive parameters and active parameters in the data integration unit, an active action analysis process of the medium flow process in the associated valve body is performed, and the passive action analysis process is performed on the active action analysis process with the passive parameters, and the state level in the medium flow process is obtained based on the passive action analysis process;

Step 3: The interactive action unit is used to control the operation process of the air pump group and adjust the active parameters in the air pump group according to the state series and the medium flow process.