Pneumatic full-port plug valve

Abstract

The application relates to the technical field of plug valves, and provides a pneumatic full-bore plug valve and a control method thereof, the control method comprising the following steps: obtaining real-time environment information in response to an adjustment trigger signal; obtaining predicted environment information based on the real-time environment information and a target opening degree; obtaining adjustment control information based on a real-time opening degree and the target opening degree; wherein the adjustment control information is used for controlling the driving part to drive the plug to rotate to the target opening degree; obtaining state analysis information based on the predicted environment information and the adjustment control information; wherein the state analysis information reflects the state of the pneumatic full-bore plug valve. The pneumatic full-bore plug valve control method provided by the application can improve the technical problem that the plug sealing performance is passively discovered and analyzed after leakage repair in the related art, and the leakage risk is possibly increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plug valves, and in particular to a pneumatic full-bore plug valve. BACKGROUND

[0002] The pneumatic plug valve is a kind of automatic valve driven by compressed air, in which a core opening and closing element (plug) is rotated by a pneumatic actuator to realize the control of fluid (liquid, gas, powder) passage or flow regulation.

[0003] However, the conventional pneumatic plug valve usually adopts a preset fixed opening degree or only adjusts the opening degree according to the air source pressure. When abnormal conditions such as plug seal wear and air source pressure fluctuation occur, it is impossible to superimpose seal compensation pressure during the adjustment process, and only passive discovery through post-maintenance can be used for fault maintenance, which may increase the risk of leakage. SUMMARY

[0004] The pneumatic full-bore plug valve provided by the embodiments of the present application can improve the technical problem of passive discovery through post-maintenance analysis of plug seal performance in the related art, which may increase the risk of leakage.

[0005] In a first aspect, the embodiments of the present application provide a pneumatic full-bore plug valve, comprising:

[0006] a valve body having a medium channel, the medium channel being used for conveying fluid;

[0007] a driving part arranged on the valve body;

[0008] a plug located in the medium channel and rotatably arranged on the valve body and in transmission connection with the driving part, the plug having an adjusting channel; and

[0009] a control part in communication connection with the driving part;

[0010] The control part is configured to control the driving part to drive the plug to rotate to change the overlapping area of the adjusting channel and the medium channel, and to drive the plug to approach and abut against the valve body.

[0011] The pneumatic full-bore plug valve further comprises:

[0012] at least two flow meters arranged on the valve body and respectively located at two ends of the medium channel, the flow meters being used for real-time monitoring of the flow of fluid passing through the two ends of the medium channel;

[0013] at least one angle acquisition device arranged on the plug or a transmission shaft of the plug, and used for real-time monitoring of the rotation angle of the plug;

[0014] Two flow meters and the angle acquisition device are respectively in communication connection with the control part.

[0015] The technical solutions provided in the embodiments of the present application have at least the following technical effects:

[0016] The pneumatic full-bore plug valve provided in the embodiments of the present application provides a stable installation reference for the plug and the driving part through the valve body, realizes unobstructed delivery of easily clogged fluids such as powder and slurry through the full-bore medium channel, and forms reliable sealing by bearing the axial pressing force through the cooperation of the sealing surface and the plug. The driving part drives the plug to rotate to change the overlapping area of the adjustment channel and the medium channel, thereby realizing flow control, and drives the plug to approach and abut against the valve body to make the sealing surface of the plug fit the sealing surface of the valve body under the axial pressing force of the driving part, thereby further blocking fluid leakage. The driving part receives the instruction of the control part, drives the plug to rotate to realize flow adjustment, and drives the plug to approach and abut against the valve body along the axial direction to apply a preset pressing force, thereby enhancing the sealing performance of the plug and providing data support for the dynamic adjustment of the control part by feeding back the running state signal in real time. The control part receives the real-time signal fed back by the driving part, judges the sealing state and the adjustment accuracy, and automatically controls the driving part to drive the plug to move to increase the axial pressing force according to the transmitted data, thereby realizing dynamic pressure compensation.

[0017] In a second aspect, the embodiments of the present application provide a pneumatic full-bore plug valve control method applied to the pneumatic full-bore plug valve of the first aspect, and the method comprises the following steps:

[0018] In response to an adjustment trigger signal, real-time environmental information is obtained, wherein the real-time environmental information includes a real-time opening degree of the plug, a real-time upstream flow and a real-time downstream flow of the medium channel, and the adjustment trigger signal is used to indicate that the driving part adjusts the real-time opening degree to a target opening degree.

[0019] Based on the real-time environmental information and the target opening degree, predicted environmental information is obtained, wherein the predicted environmental information includes a predicted upstream flow and a predicted downstream flow of the medium channel.

[0020] Based on the real-time opening degree and the target opening degree, adjustment control information is obtained, wherein the adjustment control information is used to control the driving part to drive the plug to rotate to the target opening degree.

[0021] Based on the predicted environmental information and the adjustment control information, state analysis information is obtained, wherein the state analysis information reflects the state of the pneumatic full-bore plug valve.

[0022] The technical solutions provided in the embodiments of the present application have at least the following technical effects:

[0023] Firstly, the real-time environmental information including the real-time opening degree of the plug, the real-time upstream flow and the real-time downstream flow of the medium channel is accurately obtained by responding to the adjustment trigger signal (for indicating the driving part to adjust the real-time opening degree of the plug to the target opening degree), to provide basic data support for subsequent analysis and control. Then, by combining the real-time environmental information with the target opening degree, the predicted upstream flow and the predicted downstream flow (predicted environmental information) reflecting the flow state of the medium channel after adjustment are generated, to predict the adjustment effect in advance and provide a reference benchmark for subsequent state analysis of the sealing performance. Then, by generating adjustment control information for controlling the driving part to drive the plug to rotate to the target opening degree based on the difference between the real-time opening degree and the target opening degree, the opening degree adjustment is accurately executed. Finally, by integrating the predicted environmental information and the adjustment control information, the state analysis information reflecting the overall state of the pneumatic full-bore plug valve is output, to provide a basis for performance evaluation and abnormal handling of the plug valve, to realize real-time monitoring and active analysis of the valve state, to improve the passive mode of the traditional mode of discovering problems after leakage, to enable the abnormal conditions such as sealing performance to be identified in time in the adjustment process, to provide data support for subsequent targeted disposal such as sealing compensation, to reduce the risk of leakage, and to improve the technical problem of lagging sealing performance analysis. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 A structural schematic diagram of the pneumatic full-bore plug valve provided by the embodiments of the present application is shown in the figure.

[0026] Figure 2 A sectional view of the pneumatic full-bore plug valve provided by the embodiments of the present application is shown in the figure.

[0027] Figure 3 A flowchart of the control method of the pneumatic full-bore plug valve provided by the embodiments of the present application is shown in the figure.

[0028] Figure 4 A flowchart of step S200 in the control method of the pneumatic full-bore plug valve provided by the embodiments of the present application is shown in the figure.

[0029] Figure 5 A flowchart of step S300 in the control method of the pneumatic full-bore plug valve provided by the embodiments of the present application is shown in the figure.

[0030] In the figure, various reference signs are as follows:

[0031] 100. A pneumatic full-gauge plug valve; 10. A valve body; 20. A driving part; 21. A driving connecting part; 22. A rotating part; 23. A pressure-against driving device; 24. A rotating driving device; 30. A plug; 40. A control part. DETAILED DESCRIPTION

[0032] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, and not to limit the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The description and the drawings of this application, and the above-mentioned description of the drawings, the terms "comprise" and "have" and any variations thereof, are intended to cover non-exclusive inclusion.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0036] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0037] In the present application, "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships; for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0038] It should be noted that the words "in some embodiments", "exemplary", "for example", etc. are used herein to mean "by way of illustration", "for example", "such as", "for instance", etc. Any embodiment or design scheme described herein as "in some embodiments", "exemplary", "for example" should not be construed as being more preferred or advantageous than other embodiments or design schemes. Rather, the use of the words "in some embodiments", "exemplary", "for example" is intended to present related concepts in a particular manner, meaning that the specific features, structures or properties described in conjunction with the embodiments can be included in at least one embodiment of the present application. The occurrence of the above words in various places in the specification does not necessarily mean the same embodiments, nor is it independent or alternative embodiments to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0039] The pneumatic plug valve is a kind of automatic valve driven by compressed air as power source, through pneumatic actuator to drive the rotation of the core opening and closing part (plug) in the valve, to realize the on-off control or flow regulation of fluid (liquid, gas, powder).

[0040] However, the conventional pneumatic plug valve usually adopts preset fixed opening or only adjusts the opening according to the air source pressure, when abnormal conditions such as plug seal wear, air source pressure fluctuation exceeding the standard occur, it cannot superimpose seal compensation pressure during the adjustment process, and can only be found passively through maintenance after leakage, which is easy to increase the risk of leakage.

[0041] In view of the technical problems in the prior art that the plug seal performance is analyzed passively through maintenance after leakage, which has a lagging nature and may increase the risk of leakage, embodiments of the present application provide the following solutions.

[0042] Please refer to Figure 1 and Figure 2 , the present application provides a pneumatic full-bore plug valve 100, the pneumatic full-bore plug valve 100 comprises a valve body 10, a driving part 20, a plug 30 and a control part 40, wherein:

[0043] The valve body 10 has a medium channel 11, and the medium channel 11 is used for conveying fluid.

[0044] The driving part 20 is arranged on the valve body 10.

[0045] The plug 30 is located in the medium channel 11 and is rotatably arranged on the valve body 10, and is in transmission connection with the driving part 20, and the plug 30 has an adjusting channel 31.

[0046] The control part 40 is in communication connection with the driving part 20.

[0047] The control unit 40 is configured to control the driving unit 20 to drive the plug 30 to rotate to change the overlapping area of the regulating passage 31 and the medium passage 11, and drive the plug 30 to abut against the valve body 10.

[0048] The pneumatic full-bore plug valve 100 further comprises:

[0049] At least two flow meters are arranged on the valve body 10 and located at two ends of the medium passage 11 respectively, and the flow meters are configured to monitor the flow of fluid passing through the two ends of the medium passage 11 in real time.

[0050] At least one angle acquisition device is arranged on the plug 30 or the transmission shaft of the plug 30, and is configured to monitor the rotation angle of the plug 30 in real time.

[0051] The two flow meters and the angle acquisition device are respectively connected to the control unit 40.

[0052] It can be understood that the valve body 10 provides a mounting reference for the plug 30 and the driving unit 20, and at the same time, the valve body 10 constructs a fluid conveying passage, and fluid can move from one end of the medium passage 11 to the other end. For example, the valve body 10 can be a tubular structure made of high-strength carbon steel or stainless steel, and the area where the valve body 10 contacts the plug 30 can be provided with a rubber bushing. The plug 30 contacts the rubber bushing when it is close to the valve body 10 or the regulating opening, thereby improving the sealing performance and avoiding direct friction between the plug 30 and the valve body 10 to increase the wear of the plug 30.

[0053] The plug 30 changes the overlapping area of the regulating passage 31 and the medium passage 11 by rotating, and at the same time, relies on the sealing surface to cooperate with the valve body 10 to realize fluid sealing and flow regulation. For example, the plug 30 can be a cylindrical or conical structure made of stainless steel or aluminum alloy, and the surface of the plug 30 can be covered with a rubber layer to improve the sealing performance.

[0054] The driving unit 20 is a power source for driving the plug 30 to rotate or move, and at the same time, provides the torque of the plug 30 rotation and the pressure of the axial abutment, and feeds back the abutment pressure, the rotation angle and the torque signal to the control unit 40 in real time. For example, the driving unit 20 can be a double-acting cylinder, a servo motor, etc., but is not limited thereto.

[0055] The flow meter is a device capable of monitoring the flow of medium in the medium passage 11 in real time. For example, the flow meter can be an electromagnetic flow meter, a turbine flow meter, etc., but is not limited thereto.

[0056] The angle acquisition device is a device capable of monitoring the rotation angle of the plug 30 in real time. For example, the angle acquisition device can be an encoder (the plug 30 rotates to drive the encoder shaft to rotate, and the pulse signal output by the encoder is calculated by counting or decoding to obtain the opening degree), a Hall angle sensor (an electric signal proportional to the angle of the plug 30 is received by the Hall angle sensor), and the like, but is not limited thereto.

[0057] The control part 40 is a control device capable of controlling the driving part 20 to drive the plug 30 to rotate or move according to the data transmitted by the driving part 20. For example, the control part 40 can be a programmable logic controller, a programmable automation controller, and the like, but is not limited thereto. The control part 40 can be arranged on the driving connecting piece 21.

[0058] As can be seen from the above, the pneumatic full-bore plug valve 100 provided by the embodiment of the application provides a stable installation reference for the plug 30 and the driving part 20 by the valve body 10, realizes unobstructed conveying of easily clogged fluids such as powders and slurries through the full-bore medium passage 11, and forms reliable sealing by bearing the axial pressing force through cooperation of the sealing surface and the plug 30. The driving part 20 drives the plug 30 to rotate to change the overlapping area of the regulating passage 31 and the medium passage 11, realizes flow control, and drives the plug 30 to approach and abut against the valve body 10 to make the sealing surface of the plug 30 abut against the sealing surface of the valve body 10 under the axial pressing force of the driving part 20, further blocking fluid leakage. The driving part 20 receives the instruction of the control part 40, drives the plug 30 to rotate to realize flow regulation, and drives the plug 30 to approach and abut against the valve body 10 along the axial direction to apply a preset pressing force, thereby enhancing the sealing performance of the plug 30, and providing data support for dynamic regulation of the control part 40 by feeding back the running state signal in real time. The control part 40 receives the real-time signal fed back by the driving part 20, judges the sealing state and the regulation accuracy, and automatically controls the driving part 20 to drive the plug 30 to move to increase the axial pressing force according to the transmitted data, thereby realizing dynamic pressure compensation.

[0059] In some embodiments, referring to Figure 1 and Figure 2 , the driving part 20 includes a driving connecting piece 21, a rotating piece 22, a pressing driving device 23, and at least two rotating driving devices 24.

[0060] The driving connecting piece 21 is arranged on the valve body 10.

[0061] The rotating piece 22 is rotatably arranged on the driving connecting piece 21.

[0062] The pressing driving device 23 is arranged on the rotating piece 22 and connected with the plug 30, and is used for driving the plug 30 to approach and abut against the valve body 10 in a direction perpendicular to the rotating surface of the rotating piece 22.

[0063] The rotation driving devices 24 are arranged on the driving connecting piece 21 and connected with the rotation piece 22, one of the rotation driving devices 24 is used to drive the rotation piece 22 to rotate in a first direction, and the other rotation driving device 24 is used to drive the rotation piece 22 to rotate in a second direction, the first direction is opposite to the second direction.

[0064] The control part 40 is in communication connection with the pressing driving device 23 and the rotation driving device 24 respectively.

[0065] It can be understood that the driving connecting piece 21 is responsible for fixing the pressing driving device 23 and the rotation driving device 24 with the valve body 10, and at the same time provides stable rotation support for the rotation piece 22, and ensures the accuracy of power transmission. For example, the driving connecting piece 21 can be a flange structure made of aluminum alloy or stainless steel, but is not limited thereto.

[0066] The rotation piece 22 is responsible for receiving the torque of the rotation driving device 24 and driving the plug 30 to rotate, and at the same time bearing the pressing driving device 23, realizing the transfer and cooperation of rotation and pressing power. For example, the rotation piece 22 can be a cylindrical structure made of stainless steel or aluminum alloy, but is not limited thereto. The rotation piece 22 can be rotationally connected with the driving connecting piece 21 through a bearing, and the outer periphery of the rotation piece 22 can be provided with an angle limiting protrusion, which cooperates with a limiting switch of the driving connecting piece 21 to limit the maximum rotation angle (which can be 0-90°, adapting to the flow regulation range of the plug 30) of the rotation piece 22, avoiding excessive rotation damage to the components.

[0067] The pressing driving device 23 is responsible for driving the plug 30 to approach and abut against the valve body 10 along the axial direction (the direction perpendicular to the rotation surface of the rotation piece 22), and applying a controllable pressing force to ensure that the sealing surface is tightly fitted. For example, the pressing driving device 23 can be a double-acting cylinder, a servo motor, etc., but is not limited thereto.

[0068] The two rotation driving devices 24 respectively drive the rotation piece 22 to rotate in the first direction (such as clockwise) and the second direction (such as counterclockwise), realize the bidirectional opening degree adjustment of the plug 30, and also can realize the opening degree adjustment through the other rotation driving device 24 when one of the rotation driving devices 24 fails, ensuring flexible and redundant reliable adjustment. For example, the rotation driving device 24 can be a pneumatic rack and pinion cylinder, a servo motor, etc., but is not limited thereto.

[0069] Thus, the driving connection 21 provides a stable installation reference for the rotating member 22 and the rotating driving device 24, avoiding structural deviation during power transmission. The rotating member 22 receives the torque of the rotating driving device 24, drives the plug 30 to rotate synchronously, realizes flow regulation (opening degree regulation), and bears against the driving device 23, ensuring that the push rod of the driving device 23 is coaxial with the plug 30, avoiding eccentric force during axial pressing, and through angle limiting, ensuring that the plug 30 rotates within a safe regulation range, improving operation reliability. When the push rod of the driving device 23 is extended, it pushes the plug 30 to approach the valve body 10 in a direction perpendicular to the rotating surface of the plug 30, so that the sealing surface of the plug 30 tightly abuts against the sealing surface of the valve body 10, forming an initial seal; when the sealing surfaces of the plug 30 or the valve body 10 are worn, the driving device 23 increases the output pressure to increase the pressing force under the control instruction sent by the control unit 40, thereby compensating for the sealing gap (active compensation); when the plug 30 needs to be rotated for regulation, the push rod can be appropriately retracted (to reduce the pressing force), thereby reducing the rotation resistance and avoiding excessive wear of the sealing surface. The two rotating driving devices 24 respectively receive instructions from the control unit 40, drive the rotating member 22 and the plug 30 to rotate bidirectionally through separate or coordinated action, realize flow (opening degree) regulation, and reduce flow regulation error; through the redundant design of the double rotating driving devices 24, the regulation failure caused by the failure of a single rotating driving device 24 is avoided, and the reliability of the driving part 20 is improved.

[0070] Please refer to Figure 3 The embodiment of the present application also provides a pneumatic full-bore plug valve control method, which is applied to the pneumatic full-bore plug valve 100 of any one of the above, and the pneumatic full-bore plug valve control method comprises the following steps of:

[0071] obtaining real-time environmental information in response to an adjustment trigger signal; wherein the real-time environmental information comprises a real-time opening degree of the plug, a real-time upstream flow and a real-time downstream flow of the medium channel, and the adjustment trigger signal is used to instruct the driving part to adjust the real-time opening degree to a target opening degree;

[0072] obtaining predicted environmental information based on the real-time environmental information and the target opening degree; wherein the predicted environmental information comprises a predicted upstream flow and a predicted downstream flow of the medium channel;

[0073] obtaining adjustment control information based on the real-time opening degree and the target opening degree; wherein the adjustment control information is used to control the driving part to drive the plug to rotate to the target opening degree;

[0074] obtaining state analysis information based on the predicted environmental information and the adjustment control information; wherein the state analysis information reflects the state of the pneumatic full-bore plug valve.

[0075] From the above, the pneumatic full-bore plug valve control method provided by the embodiments of the present application first acquires real-time environmental information including the real-time opening degree of the plug, the real-time upstream flow and the real-time downstream flow of the medium channel in response to the adjustment trigger signal (used to indicate that the driving part adjusts the real-time opening degree of the plug to the target opening degree), and provides basic data support for subsequent analysis and control. Then, by combining the real-time environmental information and the target opening degree, the predicted upstream flow and the predicted downstream flow (predicted environmental information) reflecting the flow state of the adjusted medium channel are generated, the adjustment effect is predicted in advance, and a reference benchmark is provided for subsequent state analysis of sealing performance. Then, by generating adjustment control information for controlling the driving part to drive the plug to rotate to the target opening degree based on the difference between the real-time opening degree and the target opening degree, the opening degree adjustment is accurately executed. Finally, by integrating the predicted environmental information and the adjustment control information, state analysis information reflecting the overall state of the pneumatic full-bore plug valve is output, which provides a basis for plug valve performance evaluation and abnormal handling, realizes real-time monitoring and active analysis of the valve state, improves the passive mode of discovering problems after leakage in the traditional mode, enables abnormal conditions such as sealing performance to be identified in time during the adjustment process, provides data support for subsequent sealing compensation and targeted handling, reduces the risk of leakage, and improves the technical problem of lagging sealing performance analysis.

[0076] In order to better understand the pneumatic full-bore plug valve control method provided by the embodiments of the present application, the specific implementation process of the pneumatic full-bore plug valve control method provided by the embodiments of the present application is exemplarily introduced below.

[0077] Figure 3 The schematic flowchart of the pneumatic full-bore plug valve control method provided by the embodiments of the present application is shown, and the pneumatic full-bore plug valve control method comprises:

[0078] S100, acquiring real-time environmental information in response to an adjustment trigger signal; wherein the real-time environmental information includes the real-time opening degree of the plug, the real-time upstream flow and the real-time downstream flow of the medium channel, and the adjustment trigger signal is used to indicate that the driving part adjusts the real-time opening degree to the target opening degree.

[0079] It can be understood that the way to obtain the real-time opening degree of the plug can be to receive the data transmitted by the encoder arranged on the rotating shaft of the plug, the encoder shaft rotates when the plug rotates, and the pulse signal output by the encoder is calculated by counting or decoding the opening degree, or it can be through the Hall angle sensor arranged on the rotating shaft of the plug to measure the rotation angle of the valve core, and receive the electrical signal output by the Hall angle sensor which is proportional to the angle, but not limited to this. The way to obtain the real-time upstream flow and the real-time downstream flow can be to receive the real-time data transmitted by the flow meter (electromagnetic flow meter, turbine flow meter, etc.) arranged on the valve body at both ends of the medium channel, but not limited to this. By responding to the adjustment trigger signal (which is used to instruct the driving part to adjust the real-time opening degree of the plug to the preset target opening degree), collecting real-time environmental information including real-time opening degree of the plug (reflecting the current opening and closing state of the valve), real-time upstream flow and real-time downstream flow of the medium channel (reflecting the actual transmission state of the fluid through the valve), providing comprehensive and real raw data support for subsequent flow prediction, opening degree precise adjustment and valve state analysis, and improving the limitation of traditional pneumatic plug valve relying only on gas source pressure or preset parameters.

[0080] S200, obtaining predicted environmental information based on the real-time environmental information and the target opening degree; wherein the predicted environmental information comprises predicted upstream flow and predicted downstream flow of the medium channel.

[0081] It can be understood that the way to obtain the predicted environmental information based on the real-time environmental information and the target opening degree can be to input the real-time opening degree of the plug, the real-time upstream flow and the real-time downstream flow of the medium channel contained in the real-time environmental information and the target opening degree corresponding to the adjustment target into the flow prediction model constructed in advance, to output the predicted upstream flow and the predicted downstream flow matched with the adjusted working condition through the correlation operation of the current running state (real-time parameter) and the adjustment target (target opening degree), and finally confirm the predicted upstream flow and the predicted downstream flow output by the model as the predicted environmental information, or it can be to receive the data transmitted by the user, but not limited to this. Obtaining the predicted environmental information based on the real-time environmental information and the target opening degree can predict the fluid transmission state after the opening degree is adjusted in advance, provide basis for subsequent sealing performance analysis and adjustment effect verification, improve the limitation of traditional pneumatic plug valve that only executes adjustment without prediction and analysis, identify abnormalities such as sealing leakage through the comparison between the predicted flow and the actual adjusted flow after (such as prompting that the sealing may fail if the actual flow difference exceeds the prediction range), and improve the lag of traditional valve that needs to be passive to find problems after leakage occurs.

[0082] In one possible implementation, please refer to Figure 4 S200, obtaining predicted environmental information based on the real-time environmental information and the target opening degree, comprising:

[0083] S210, input the real-time opening degree, target opening degree, real-time upstream flow and real-time downstream flow into the flow prediction model to obtain the predicted upstream flow and predicted downstream flow output by the flow prediction model.

[0084] It can be understood that the flow prediction model is trained by machine learning through a plurality of sets of data, each set of data in the plurality of sets of data comprising: real-time opening degree, target opening degree, real-time upstream flow and real-time downstream flow, and predicted upstream flow and predicted downstream flow given by manual real-time calculation. Through model operation, flow prediction is realized to ensure that the prediction result is adapted to the actual adjustment demand, and to provide a basis for subsequent comparison and verification of adjustment effect and identification of sealing abnormalities.

[0085] S220, confirming the predicted upstream flow and predicted downstream flow as the predicted environment information.

[0086] It can be understood that confirming the predicted upstream flow and predicted downstream flow output by the flow prediction model as the predicted environment information can define the result through standardization, and provide a basis for subsequent analysis of the sealing performance of the pneumatic full-bore plug valve and verification of the adjustment effect.

[0087] S300, obtaining adjustment control information based on the real-time opening degree and the target opening degree; wherein the adjustment control information is used to control the driving part to drive the plug to rotate to the target opening degree.

[0088] It can be understood that the way to obtain the adjustment control information based on the real-time opening degree and the target opening degree can be to first obtain an opening degree difference value by subtracting the real-time opening degree from the target opening degree, and then to judge whether the absolute value of the difference value is less than or equal to the minimum single driving angle of the driving part; if the absolute value of the difference value is less than or equal to the minimum single driving angle, a double driving method is adopted to generate the adjustment control information (i.e., first control the abutting driving device to drive the plug to move a preset abutting distance in the unlocking direction, then control the two counter-rotating driving devices to synchronously increase the torque and real-time monitor the first torque and the second torque, and finally generate opening degree control information containing the action instructions of each device based on the torque change and the plug rotation angle); if the absolute value of the difference value is greater than the minimum single driving angle, the adjustment control information for instructing the driving part to drive the plug to rotate to the target opening degree is directly generated to ensure that the opening degree adjustment is adapted to both small-angle high-precision adjustment demand and large-angle high-efficiency adjustment scene, and to realize precise driving control under different opening degree differences. It can also be that the real-time opening degree and the target opening degree are sent to the user and the data transmitted by the user is received, but it is not limited thereto. Taking the current real-time opening degree of the plug and the preset target opening degree as the core basis, the adjustment control information for controlling the driving part to drive the plug to rotate to the target opening degree is generated by quantifying the difference between the two and matching the running characteristics of the driving part, which improves the limitation of traditional valves relying on only preset fixed parameters or single air source pressure adjustment, and ensures the accuracy and pertinence of the opening degree adjustment by matching the current state and target demand.

[0089] In a possible implementation, refer to Figure 4 and Figure 5 S300, obtaining adjustment control information based on the real-time opening degree and the target opening degree, including:

[0090] S310, confirming the value obtained by subtracting the real-time opening degree from the target opening degree as an opening degree difference value.

[0091] It can be understood that confirming the value obtained by subtracting the real-time opening degree from the target opening degree as the opening degree difference value can provide a judgment basis for subsequent judgment of the driving mode of the driving part (whether to adopt the double driving method or direct driving).

[0092] For example, assuming that the target opening degree is 10° and the real-time opening degree is 15°, the opening degree difference value = 10-15 = -5° (the opening degree difference value is negative, which means that the opening degree decreases, and the opening degree difference value is positive, which means that the opening degree increases).

[0093] S320, judging whether the absolute value of the opening degree difference value is less than or equal to the minimum single driving angle.

[0094] It can be understood that the minimum single driving angle can be 0.5°, 1°, etc., but is not limited thereto. Judging whether the absolute value of the opening degree difference value is less than or equal to the minimum single driving angle is to compare the absolute value of the quantized opening degree difference value with the minimum single driving angle of the driving part, to determine the amount of opening degree adjustment demand and to distinguish different adjustment scenes (if the absolute value of the difference value does not exceed the minimum single driving angle, the double driving method needs to be adopted to ensure the small-angle adjustment accuracy; if it exceeds, the cock can be directly driven to rotate), to provide clear decision basis for subsequent scene-based generation of adjustment control information, and to ensure that the driving mode is adapted to the opening degree difference.

[0095] S330, if the opening degree difference value is less than or equal to the minimum single driving angle, obtaining the adjustment control information based on the double driving method; if the opening degree difference value is greater than the minimum single driving angle, obtaining the adjustment control information for instructing the driving part to drive the cock to rotate to the target opening degree.

[0096] It can be understood that the way of obtaining the adjustment control information based on the double driving method can be that the control is first performed on the abutting driving device to drive the valve plug to move by a preset abutting distance to release the adhesion constraint, then the control is performed on the two rotating driving devices with opposite driving directions to synchronously increase the torque, and the first torque corresponding to the opening difference and the second torque of the other device are monitored in real time, then the opening control information is dynamically generated based on the two torque changes, when the two torques reach the friction value required for driving the valve plug to rotate, the second torque is kept unchanged, the first torque is increased at a preset increasing rate, and the rotation angle of the valve plug is monitored, when the rotation angle reaches half of the absolute value of the opening difference, the first torque is decreased at a preset decreasing rate until it is equal to the friction value again, at this time, the two rotating driving devices are controlled to be synchronously unloaded to 0, then the abutting driving device (opposite to the previous moving direction) is controlled to drive the valve plug to move by the preset abutting distance to complete the locking, or data transmitted by the user is received, but is not limited thereto. If the opening difference is less than or equal to the minimum single driving angle, it is represented that when the valve plug is driven to rotate by the single direction driving device, the actual rotation angle of the valve plug is greater than the required rotation angle due to the large static friction of the sealing surface of the valve plug, and the single driving is prone to impact start (causing inertia overshoot) to overcome the static friction, so the precision under small angle adjustment needs to be ensured through the cooperative action of multiple devices. If the opening difference is greater than the minimum single driving angle, the adjustment control information for indicating the driving part to drive the valve plug to rotate to the target opening is directly generated, and high efficient driving under large angle adjustment is realized.

[0097] In a possible implementation, referring to Figure 4 and Figure 5 , in S330, the adjustment control information is obtained based on the double driving method, including:

[0098] In S331, step a, the abutting driving device is controlled to drive the valve plug to move by a preset abutting distance in an unlocking direction; wherein the unlocking direction is a direction perpendicular to the rotation surface of the valve plug and opposite to the direction of gravity.

[0099] It can be understood that the preset abutting distance can be 1 cm, 2 cm, etc., but is not limited thereto. The unlocking direction is a direction in which the valve plug is driven to move away from the valve body in a direction perpendicular to the fluid conveying direction in the medium channel. Controlling the abutting driving device to drive the valve plug to move by a preset abutting distance in an unlocking direction can release the adhesion constraint of the valve plug and the sealing surface through directional and quantitative displacement operation, and lay an operation foundation for the torque adjustment of the rotating driving device and the accurate angle adjustment of the valve plug.

[0100] In S332, step b, the two rotating driving devices are controlled to synchronously increase the torque, and the first torque and the second torque are monitored in real time; wherein the directions in which the two rotating driving devices drive the valve plug to rotate are opposite, the first torque is the torque generated by the rotating driving device corresponding to the opening difference, and the second torque is the torque generated by the other rotating driving device.

[0101] It can be understood that the initial torque balance established by the synchronous torque increase of the reverse driving device provides a stable torque reference for subsequent precise control of the rotation angle of the valve, and the real-time monitoring of the double torque data can timely feedback the driving state, avoid the adjustment deviation caused by torque fluctuation in single driving mode, and provide reliable torque data support for small angle adjustment.

[0102] For example, assuming that there are two rotating driving devices A and B, the rotating driving device A drives the valve to rotate clockwise, and the rotating driving device B drives the valve to rotate counterclockwise. The opening degree increases when the valve rotates clockwise, and the opening degree decreases when the valve rotates counterclockwise. If the opening degree difference is 5°, the rotating driving device A corresponds to the opening degree difference. If the opening degree difference is -5°, the rotating driving device B corresponds to the opening degree difference.

[0103] In step c, the opening degree control information is obtained based on the first torque and the second torque; wherein the opening degree control information is used to control the two rotating driving devices and the pressing driving device.

[0104] It can be understood that the way to obtain the opening degree control information based on the first torque and the second torque can be that when the real-time monitored first torque (corresponding to the opening degree difference) and the second torque (reverse driving) both reach the friction value required for driving the valve to rotate, the rotating driving device corresponding to the second torque is first controlled to maintain the torque to maintain the balance, while the rotating driving device corresponding to the first torque is controlled to increase the torque at a preset increasing speed, and the rotation angle of the valve is tracked in real time. When the rotation angle reaches half of the absolute value of the opening degree difference, the first torque is controlled to decrease at a preset increasing speed to avoid overshoot of the valve. When the first torque falls to the friction value again, the two rotating driving devices are controlled to decrease the torque to 0 synchronously, and then the pressing driving device is instructed to drive the valve to move a preset contact distance in the locking direction opposite to the unlocking direction to complete the fixation, while the torque difference (the difference between the first torque and the second torque) and the rotation angle of each node on the time axis are recorded to form a torque-angle correspondence relationship. Finally, the above "torque increasing and decreasing control, rotation angle monitoring, and pressing driving locking" action flow instructions are integrated into the opening degree control information, or the first torque and the second torque are sent to the user and the data transmitted by the user is received, but not limited thereto. The dynamic feedback of the double torque data adapts to the torque balance and angle control requirements in the small angle adjustment scene, which not only ensures that the torque output of the rotating driving device matches the rotation resistance of the valve in real time, avoids the problem of seal surface wear caused by over-torque or the problem of inability to drive caused by under-torque, but also provides timing instructions for the subsequent actions of the pressing driving device, ensuring the high precision and stability of small angle opening degree adjustment.

[0105] In one possible implementation, please refer to Figure 4 and Figure 5 In S333, the opening degree control information is obtained based on the first torque and the second torque, comprising:

[0106] S3331, when the first torque and the second torque are equal to the friction value, the rotating driving device controlling the second torque is controlled to keep the torque, and the rotating driving device corresponding to the first torque is controlled to gradually increase the torque at a preset torque increasing rate, and the rotation angle of the plug is monitored in real time; wherein the friction value reflects the torque value required to drive the plug to rotate.

[0107] It can be understood that the preset torque increasing rate can be 0.5 N·m / s, 2 N·m / s, etc., but is not limited thereto. When the first torque (corresponding to the opening difference value) and the second torque (reverse driving) monitored in real time both reach the friction value (reflecting the basic torque required to drive the plug to rotate to overcome the resistance of the contact surface), on the one hand, the rotating driving device outputting the second torque is controlled to keep the current torque, so as to maintain the torque balance on both sides of the plug and avoid the plug from deviating due to unilateral torque mutation; on the other hand, the rotating driving device outputting the first torque is controlled to gradually increase the torque at a preset torque increasing rate, so as to ensure that the driving force increases smoothly to realize slow rotation of the plug; at the same time, the rotation angle of the plug is monitored in real time, so as to provide dynamic feedback for subsequent judgment of whether the angle meets the standard and timely adjustment of the torque, reduce the possibility of over-shooting of the plug or wear of the sealing surface caused by sudden increase of the torque, and accurately capture the rotation trajectory of the plug, thereby providing a basis for precision control of small-angle adjustment.

[0108] S3332, when the rotation angle is equal to half of the absolute value of the opening difference value, the rotating driving device corresponding to the first torque is controlled to gradually decrease the torque at a preset torque increasing rate.

[0109] It can be understood that when the rotation angle is equal to half of the absolute value of the opening difference value, the rotating driving device corresponding to the first torque is controlled to gradually decrease the torque at a preset torque increasing rate, which can be based on the high-precision requirement of small-angle adjustment, utilize the inertial effect of the rotation of the plug to realize smooth transition of increasing speed and decreasing speed by decreasing the torque in advance, avoid over-rotation (exceeding the target opening) of the plug due to continuous loading of the torque, and at the same time, reserve buffer space for subsequent decrease of the torque to the friction value and completion of positioning, so as to ensure that the angle adjustment of the plug meets the target difference value and the precision and stability of small-angle adjustment.

[0110] S3333, when the first torque again equals the friction value, the two rotating driving devices are controlled to decrease the torque synchronously, and after the torque of the two rotating driving devices decreases to 0, the abutting driving device is controlled to drive the plug to move in a locking direction by a preset abutting distance, and a torque-angle corresponding relationship is obtained based on the torque difference value and the rotation angle monitored in real time; wherein the locking direction is opposite to the unlocking direction, the torque difference value is the difference between the first torque and the second torque, and the torque-angle corresponding relationship includes the torque difference value and the rotation angle corresponding to each time node on a time axis.

[0111] It can be understood that the two rotating driving devices are first controlled to reduce the torque synchronously until the torque value is reduced to 0 to terminate the rotating driving force; after the torque is completely removed, the abutting driving device is controlled to move the plug in the locking direction opposite to the unlocking direction by a preset abutting distance, so as to realize accurate fixing of the plug position; at the same time, based on the torque difference (i.e. the difference between the first torque and the second torque) and the plug rotation angle monitored in real time during the adjustment process, a torque-angle corresponding relationship containing the torque difference and the rotation angle corresponding to each time node on the time axis is constructed. The timing design of first removing the torque and then locking avoids the displacement of the plug due to residual torque, ensures the final accuracy of small-angle adjustment, and at the same time generates the torque-angle corresponding relationship, which provides core data support for subsequent analysis of the friction state of the plug and the sealing surface and judgment of the wear degree.

[0112] S334, confirming steps a, b and c as adjustment control information.

[0113] It can be understood that confirming steps a, b and c as adjustment control information can form a standardized and executable complete control scheme from the dispersed single-step action instructions, ensure the accurate cooperation of the action timing and parameter setting of the abutting driving device and the double-rotating driving device, provide a closed-loop controllable execution basis for the small-angle adjustment scene, and provide a basis for subsequent valve wear performance analysis through the integration of the torque-angle corresponding relationship.

[0114] S400, obtaining state analysis information based on the predicted environment information and the adjustment control information; wherein the state analysis information reflects the state of the pneumatic full-bore plug valve.

[0115] It can be understood that the manner of obtaining the state analysis information based on the predicted environment information and the adjustment control information can be that the predicted upstream flow and the predicted downstream flow in the predicted environment information are taken as the core reference, and first, the actual upstream flow and the actual downstream flow after the opening adjustment are calculated by difference, if the deviation of the actual flow difference and the predicted flow difference exceeds the preset sealing threshold, it is determined that there is a sealing leakage; then the torque angle corresponding relationship (torque difference of each node on the time axis and rotation angle) contained in the adjustment control information is extracted, and the historical torque data under the same working condition is compared, if the same opening adjustment requires a significant increase in friction value (basic torque for driving the plug to rotate), or the torque difference fluctuation amplitude exceeds the normal range, it is determined that the plug and the sealing surface have a wear aggravation condition; at the same time, the action execution accuracy in the adjustment control information is verified, including whether the torque loading / unloading timing of the double-rotation driving device, the unlocking / locking displacement of the pressure driving device conforms to the preset standard, and whether the deviation of the actual rotation angle and the opening difference value is within the allowable range, to judge whether the driving execution is accurate; finally, the multi-dimensional judgment results of sealing integrity, mechanical wear degree, driving execution accuracy, etc. are integrated to form the state analysis information which comprehensively reflects the running state of the pneumatic full-bore plug valve, which can also be that the predicted environment information and the adjustment control information are sent to the user, and then the data transmitted by the user is received, but not limited to this. Based on the predicted environment information and the adjustment control information, the state analysis information can improve the limitation of the traditional valve which only relies on a single parameter to judge the state, and through the cooperative analysis of the predicted environment information and the torque angle corresponding relationship, the core states of the valve sealing integrity, the mechanical wear degree, the driving execution accuracy, etc. are judged, which provides a basis for subsequent abnormal early warning and maintenance decision.

[0116] In a possible implementation manner, referring to Figure 4 , S400, obtaining state analysis information based on predicted environment information and adjustment control information, comprising:

[0117] S410, obtaining first analysis information based on predicted environment information; wherein the first analysis information reflects the sealing performance of the plug.

[0118] It can be understood that the way to obtain the first analysis information based on the predicted environment information can be to first extract the core data (predicted upstream flow and predicted downstream flow) from the predicted environment information, obtain the predicted flow difference (i.e. predicted upstream flow minus predicted downstream flow) by calculating the difference between the two, and use it as the benchmark basis for judging the sealing performance; after the pneumatic full-bore plug valve completes the opening adjustment (rotates to the target opening) according to the adjustment control information, the actual upstream flow and the actual downstream flow of the medium passage at this time are collected, and the actual flow difference is calculated synchronously; then the deviation value (i.e. actual flow difference minus predicted flow difference) of the actual flow difference and the predicted flow difference is quantitatively analyzed, and the deviation value is compared with the preset sealing threshold (the allowed leakage flow difference range preset based on the valve design sealing standard and the medium characteristics); if the deviation value is within the preset sealing threshold, it is determined that the plug and the sealing surface are tightly fitted, and the sealing performance is good; if the deviation value exceeds the preset sealing threshold, it is determined that there is sealing leakage (the larger the deviation value, the more serious the leakage), and finally the sealing performance judgment result is determined as the first analysis information, or the predicted environment information is sent to the user and the data transmitted by the user is received, but not limited thereto. Based on the predicted environment information, the first analysis information can be obtained by comparing the predicted benchmark with the actual verification flow to judge the sealing integrity of the plug, and to provide key sealing performance data support for the state analysis information.

[0119] In one possible implementation, please refer to Figure 4 , S410, obtaining the first analysis information based on the predicted environment information, comprising:

[0120] S411, after the adjustment control information is executed, the value obtained by subtracting the predicted downstream flow from the predicted upstream flow is confirmed as the predicted difference, and the range interval obtained by floating the predicted difference by a preset range ratio is confirmed as the flow judgment range.

[0121] It can be understood that the preset range ratio can be 1%, 5%, etc., but is not limited thereto. By first determining the predicted difference and then leaving a fluctuation redundancy, a judgment basis is provided for subsequent comparison of whether the actual flow difference meets the sealing requirement (both the ideal flow difference benchmark under the predicted working condition and the small fluctuation under the actual working condition are compatible through the preset ratio floating, avoiding misjudgment of sealing leakage due to normal fluctuation).

[0122] For example, assuming that the predicted difference is 1.0 m³ / h and the preset range ratio is 1%, then the flow judgment range = (1*0.99, 1*1.01) = (0.99 m³ / h, 1.01 m³ / h).

[0123] S412, step d, obtaining the adjusted upstream flow and the adjusted downstream flow of the medium passage, and confirming the value obtained by subtracting the adjusted downstream flow from the adjusted upstream flow as the adjusted difference.

[0124] It can be understood that, by capturing the flow loss related data under the actual running state of the valve, accurate actual reference benchmark (the adjusted difference value reflects the flow difference of the medium passing through the valve in the actual working condition, which is the key data for judging whether the sealing surface leaks) is provided for subsequent comparison with the flow judgment range (generated based on the predicted difference value), and actual data support is provided for the generation of the first analysis information.

[0125] In step e, if the adjusted difference value is greater than the maximum value in the flow judgment range, a value obtained by adding the preset interference distance to the step interference distance is confirmed as a new preset interference distance, and an interference sealing instruction for controlling the interference driving device to drive the plug to move the step interference distance in the locking direction is obtained. After the interference sealing instruction is executed, steps d and e are repeated. If the adjusted difference value is within the flow judgment range, a value obtained by reducing the number of times of executing step e by 1 is confirmed as the interference adjustment number, and a value obtained by dividing the interference adjustment number by the maximum adjustment number is confirmed as the sealing reflection value. The maximum adjustment number is a value obtained by dividing the maximum adjustable distance by the step interference distance, and the maximum adjustable distance reflects the maximum movement distance of the plug driven by the interference driving device.

[0126] It can be understood that the step interference distance can be 2mm, 5mm, etc., but is not limited thereto. If the adjusted difference value is greater than the maximum value in the flow judgment range (indicating that the sealing is not tight enough and there is a risk of leakage), the original preset interference distance is added to the step interference distance to obtain a new preset interference distance, and an interference sealing instruction (controlling the interference driving device to drive the plug to move an additional step interference distance in the locking direction to enhance the fit pressure of the plug and the sealing surface) is generated. After the interference sealing instruction is executed, steps d (acquiring the adjusted upstream and downstream flow and calculating the adjusted difference value) and the present step are repeatedly executed until the adjusted difference value meets the requirements. If the adjusted difference value is within the flow judgment range (indicating that the sealing performance meets the requirements), the total number of times of executing the present step is reduced by 1 to obtain the actual interference adjustment number (excluding the invalid count of the last time that meets the requirements), and then the actual interference adjustment number is divided by the maximum adjustment number to obtain the sealing reflection value. The maximum adjustment number is calculated by dividing the maximum adjustable distance (reflecting the maximum stroke of the plug driven by the interference driving device) by the step interference distance, and the sealing reflection value quantifies the adjustment amplitude required for the sealing to meet the requirements. The sealing leakage problem is improved and solved through the mode of dynamic pressure adjustment and cyclic verification, and the sealing performance is converted into a quantifiable index (the fewer the adjustment times and the smaller the sealing reflection value, the better the initial sealing state or the lower the wear degree) through the sealing reflection value, thereby providing data support for subsequent comprehensive state analysis.

[0127] S414, if the sealing reflection value is less than or equal to the preset sealing ratio, first analysis information reflecting that the sealing performance of the faucet is good is obtained; if the sealing reflection value is greater than the preset sealing ratio, first analysis information reflecting that the sealing performance of the faucet is abnormal is obtained.

[0128] It can be understood that the preset sealing ratio can be 0.5, 0.7, etc., but is not limited thereto. The sealing reflection value (the ratio of the actual interference adjustment times to the maximum adjustment times, wherein the maximum adjustment times are calculated by the maximum adjustable distance divided by the step interference distance) is taken as a quantitative index, and is accurately compared with the preset sealing ratio (a critical threshold value set based on the sealing standard of valve design, medium characteristics and use conditions). If the sealing reflection value is less than or equal to the preset sealing ratio, it indicates that only a small amount (or no) interference adjustment is needed to achieve the standard sealing, the sealing performance of the faucet is determined to be good, and the corresponding first analysis information is generated. If the sealing reflection value is greater than the preset sealing ratio, it indicates that multiple interference adjustments are needed to achieve the sealing requirement, which prompts that the faucet and the sealing surface may have problems such as accelerated wear, decreased fitting precision, etc., the sealing performance of the faucet is determined to be abnormal, and the corresponding first analysis information is generated.

[0129] S420, second analysis information is obtained based on the torque angle corresponding relationship; wherein the second analysis information reflects the wear performance of the faucet.

[0130] It can be understood that the way to obtain the second analysis information based on the torque angle correspondence relationship can be to take the torque angle correspondence relationship under the same working condition (the same opening adjustment range, the same medium characteristics, and the same predicted environment information) as the reference, and extract the reference friction value (the basic torque required for driving the valve at that time), the reference torque difference value fluctuation range (the normal fluctuation interval of the difference value between the first torque and the second torque under the same angle adjustment), and the reference synchronization parameter (the time difference threshold of the torque loading / unloading and the rotation angle change) as the judgment reference. Then, from the torque angle correspondence relationship generated by the current adjustment control information, the three core features are accurately extracted: one is the current friction value (the basic torque required for driving the valve to overcome the contact resistance under the current working condition), the second is the torque difference value (the difference value between the first torque and the second torque) fluctuation range in the same rotation angle interval, and the third is the synchronization of the torque increase / decrease change and the valve rotation angle change (i.e., the time lag amount of the torque change and the angle change). Then, the current features are quantitatively compared with the reference parameters: if the current friction value increases beyond the preset wear threshold compared with the reference friction value, it is determined that the contact resistance between the valve and the sealing surface increases, and the wear degree intensifies; if the torque difference value fluctuation range exceeds the reference range, it is prompted that there is a problem of uneven wear of the sealing surface or an increase in the roughness of the valve surface; if the lag amount of the torque and the angle change exceeds the reference synchronization parameter, it is indicated that the wear causes the abnormal contact gap between the valve and the sealing surface. Finally, the above comparison results are comprehensively analyzed to determine the key conclusions such as the wear degree (slight / moderate / severe) and the wear type (uniform wear / local wear / sealing surface damage), which are integrated into the second analysis information reflecting the wear performance of the valve, or the torque angle correspondence relationship is sent to the user and the data transmitted by the user is received, but not limited to this. The second analysis information obtained based on the torque angle correspondence relationship can convert the wear state into quantifiable torque angle feature indicators, avoid the subjectivity and hysteresis of traditional wear detection, realize the judgment of the wear degree and uniformity of the valve and the sealing surface, and provide data support for the state analysis information.

[0131] In a possible implementation, referring to Figure 4 , S420, the second analysis information is obtained based on the torque angle correspondence relationship, including:

[0132] S421, at least two rotation rates corresponding to the torque difference value are obtained based on the torque angle correspondence relationship.

[0133] It can be understood that the way to calculate the rotation rate can be to select the torque difference values of at least two different time periods (optionally, the characteristic node data of the increasing stage, the stable stage or the decreasing stage of the torque difference value can be selected), and to calculate the ratio of the rotation angle change amount of the plug in each time period to the corresponding time change amount (i.e., the rotation rate v = Δθ / Δt) respectively, to ensure that each rotation rate can accurately match the corresponding torque difference value, and to form a plurality of corresponding data of torque difference value-rotation rate. Based on the torque-angle correspondence relationship (including the torque difference value of each node on the time axis, the difference between the first torque and the second torque, and the corresponding rotation angle data), at least two rotation rates corresponding to the torque difference value are calculated through differential data extraction in the time dimension. The friction resistance state of the plug is reflected through the correlation between the rotation rate and the torque difference value, and a plurality of corresponding data are obtained to avoid the contingency of a single data, thereby providing data support for subsequent analysis of the change rule of the torque difference value and the rotation rate and determination of the wear performance.

[0134] S422, respectively, subtracting the corresponding ideal rate from each rotation rate to obtain a value, and then dividing the value by the corresponding ideal rate to obtain a value confirmed as a wear analysis value; wherein the torque difference value corresponding to the rotation rate and the corresponding ideal rate is the same.

[0135] It can be understood that the ideal rate is the rotation rate of the plug when the torque and the rotation rate correspond to the same torque in the ideal case (when the plug is newly produced). Based on the same torque difference value corresponding to the same ideal working condition, each rotation rate is matched with the corresponding ideal rate (the torque difference values of the two are consistent, to ensure the uniformity of the compared working conditions); then, through standard deviation calculation, each rotation rate is subtracted from the corresponding ideal rate to obtain a rate deviation value, and then divided by the corresponding ideal rate, and finally the calculation result is confirmed as the wear analysis value (i.e., wear analysis value = (rotation rate - corresponding ideal rate) / corresponding ideal rate). The greater the deviation and the greater the absolute value of the wear analysis value, the more significant the deviation between the actual rotation state and the ideal state, which indirectly reflects the abnormal friction resistance between the plug and the sealing surface (caused by wear).

[0136] S423, if the wear analysis value is within the preset wear range, second analysis information reflecting that the wear performance of the plug is good is obtained; if the wear analysis value is not within the preset wear range, second analysis information reflecting that the wear performance of the plug is abnormal is obtained.

[0137] It can be understood that the preset wear range can be (0, 0.6), (0, 0.7), etc., but is not limited thereto. If the wear analysis value is within the preset wear range, it indicates that the deviation of the actual rotation rate from the ideal rate is within the allowable range, the frictional resistance of the plug and the sealing surface does not abnormally increase due to wear, it is determined that the plug wear performance is good, and the corresponding second analysis information is generated; if the wear analysis value exceeds the preset wear range (especially when the negative value is large, it indicates that the actual rotation rate is significantly lower than the ideal rate under the same torque difference, and the frictional resistance increases significantly due to wear), it is determined that the plug wear performance is abnormal, and the corresponding second analysis information is generated.

[0138] In S430, if the first analysis information and the second analysis information both reflect good performance, state analysis information reflecting that the state of the pneumatic full-bore plug valve is good is obtained; if the first analysis information and / or the second analysis information do not reflect good performance, state analysis information reflecting that the state of the pneumatic full-bore plug valve is abnormal is obtained.

[0139] It can be understood that if the first analysis information clearly indicates that the plug sealing performance is good, and the second analysis information confirms that the plug wear performance is good (i.e., both core performances meet the preset standard), the state analysis information reflecting that the overall running state of the pneumatic full-bore plug valve is good is integrated and generated; if the first analysis information reflects that the sealing performance is abnormal, the second analysis information reflects that the wear performance is abnormal, or either of the two performances is abnormal (i.e., there is at least one hidden danger in the core performance), the state analysis information reflecting that the overall state of the pneumatic full-bore plug valve is abnormal is generated. Through the coverage verification of the two key performances of sealing integrity and mechanical wear, the hidden danger caused by single performance research and judgment is avoided, and the comprehensiveness and reliability of the state analysis information are ensured.

[0140] The pneumatic full-bore plug valve 100 provided in the embodiments of the present application can include at least one processor, at least one memory, and a computer program stored in the at least one memory and executable on the at least one processor. When the processor executes the computer program, the pneumatic full-bore plug valve 100 implements the steps in any of the pneumatic full-bore plug valve control method embodiments described above.

[0141] By way of example, the computer program can be divided into one or more modules / units, which are stored in the memory and executed by the processor to complete the present application. One or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program in the control part.

[0142] The control unit can be an embedded integrated controller, a programmable logic controller, a control box, or the like computing device. The control unit can include, but is not limited to, a processor, a memory. Those skilled in the art can understand that the above embodiments are only examples of the control unit, and do not constitute a limitation on the control unit, and can include more or less components, or combine certain components, or different components, for example, can also include input / output devices, network access devices, buses, etc.

[0143] The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0144] The memory can be an internal storage unit of the control unit in some embodiments, for example, a hard disk or a memory of the control unit. The memory can also be an external storage device of the control unit in other embodiments, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the control unit. Further, the memory can include both the internal storage unit and the external storage device of the control unit. The memory is used to store an operating system, an application program, a boot loader, data, and other programs, for example, program codes of computer programs, etc. The memory can also be used to temporarily store data that has been output or will be output.

[0145] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the steps in any of the above method embodiments.

[0146] The embodiments of the present application provide a computer program product. When the computer program product is run on the control unit, the control unit implements the steps in any of the above method embodiments.

[0147] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned various method embodiments can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium at least includes any entity or device capable of carrying the computer program code to the control part, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium. For example, U disk, mobile hard disk, magnetic disk or optical disk and the like.

[0148] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0149] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0150] In the embodiments provided in the present application, it should be understood that the disclosed pneumatic full-bore plug valve and method can be implemented in other ways. For example, the embodiments of the pneumatic full-bore plug valve and method described above are merely illustrative. In addition, the coupling or direct coupling or communication connection between the displayed or discussed units can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0151] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. they can be located in one place or distributed on multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiment according to actual needs.

[0152] The above only describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method of controlling a pneumatic full-gauge plug valve, characterized by, The application is applied to a pneumatic full-bore plug valve, and the pneumatic full-bore plug valve comprises: a valve body having a medium channel for conveying fluid; a driving part arranged on the valve body; a plug located in the medium channel and rotatably arranged on the valve body and in transmission connection with the driving part, the plug having an adjusting channel; and a control part in communication connection with the driving part; wherein the control part is used to control the driving part to drive the plug to rotate to change the overlapping area of the adjusting channel and the medium channel and to drive the plug to approach and abut against the valve body; the pneumatic full-bore plug valve further comprises: at least two flow meters arranged on the valve body and respectively located at two ends of the medium channel, the flow meters being used to monitor the flow of fluid passing through the two ends of the medium channel in real time; at least one angle acquisition device arranged on the plug or a transmission shaft of the plug and used to monitor the rotation angle of the plug in real time; wherein the two flow meters and the angle acquisition device are respectively in communication connection with the control part; the control method of the pneumatic full-bore plug valve comprises: acquiring real-time environmental information in response to an adjusting trigger signal; wherein the real-time environmental information comprises a real-time opening degree of the plug, a real-time upstream flow and a real-time downstream flow of the medium channel, and the adjusting trigger signal is used to instruct the driving part to adjust the real-time opening degree to a target opening degree; obtaining predicted environmental information based on the real-time environmental information and the target opening degree; wherein the predicted environmental information comprises a predicted upstream flow and a predicted downstream flow of the medium channel; obtaining adjusting control information based on the real-time opening degree and the target opening degree; wherein the adjusting control information is used to control the driving part to drive the plug to rotate to the target opening degree; the obtaining of the adjusting control information based on the real-time opening degree and the target opening degree comprises: firstly obtaining an opening degree difference value by subtracting the real-time opening degree from the target opening degree, and then judging whether the absolute value of the opening degree difference value is less than or equal to the minimum single driving angle of the driving part; if the absolute value of the opening degree difference value is less than or equal to the minimum single driving angle, a double driving method is adopted to generate the adjusting control information; and if the absolute value of the opening degree difference value is greater than the minimum single driving angle, the adjusting control information is directly generated to instruct the driving part to drive the plug to rotate to the target opening degree; obtaining state analysis information based on the predicted environmental information and the adjusting control information; wherein the state analysis information reflects the state of the pneumatic full-bore plug valve.

2. The pneumatic full-hole plug valve control method of claim 1, wherein, the driving part comprises: a driving connecting part arranged on the valve body; a rotating part rotatably arranged on the driving connecting part; an abutting driving device arranged on the rotating part and connected with the plug, and used to drive the plug to approach and abut against the valve body in a direction perpendicular to the rotating surface of the rotating part; and At least two rotating driving devices are arranged on the driving connecting member and connected with the rotating member, one of the rotating driving devices is used to drive the rotating member to rotate in a first direction, and the other rotating driving device is used to drive the rotating member to rotate in a second direction, the first direction is opposite to the second direction; The control part is respectively connected with the pressing driving device and the rotating driving device.

3. The pneumatic full-hole plug valve control method of claim 1, wherein, The predicted environment information is obtained based on the real-time environment information and the target opening degree, including: The real-time opening degree, the target opening degree, the real-time upstream flow and the real-time downstream flow are input into a flow prediction model to obtain the predicted upstream flow and the predicted downstream flow output by the flow prediction model; The predicted upstream flow and the predicted downstream flow are confirmed as the predicted environment information.

4. The pneumatic full-hole plug valve control method of claim 1, wherein, The adjustment control information is obtained based on the real-time opening degree and the target opening degree, including: The value obtained by subtracting the real-time opening degree from the target opening degree is confirmed as an opening degree difference value; It is judged whether the absolute value of the opening degree difference value is less than or equal to a minimum single driving angle; If the opening degree difference value is less than or equal to the minimum single driving angle, the adjustment control information is obtained based on a double driving method; if the opening degree difference value is greater than the minimum single driving angle, the adjustment control information for instructing the driving part to drive the plug to rotate to the target opening degree is obtained.

5. The pneumatic full-hole plug valve control method of claim 4, wherein, The adjustment control information is obtained based on the double driving method, including: Step a, controlling the pressing driving device to drive the plug to move in an unlocking direction by a preset pressing distance; wherein the unlocking direction is a direction perpendicular to the rotating surface of the plug and opposite to the direction of gravity; Step b, controlling two rotating driving devices to synchronously increase torque, and monitoring first torque and second torque in real time; wherein the directions in which the two rotating driving devices drive the plug to rotate are opposite, the first torque is the torque generated by the rotating driving device corresponding to the opening degree difference value, and the second torque is the torque generated by the other rotating driving device; Step c, obtaining opening degree control information based on the first torque and the second torque; wherein the opening degree control information is used to control the two rotating driving devices and the pressing driving device; The step a, the step b and the step c are confirmed as the adjustment control information.

6. The pneumatic full-hole plug valve control method of claim 5, wherein, The opening degree control information is obtained based on the first torque and the second torque, including: When the first torque and the second torque are equal to a friction value, the rotating driving device corresponding to the second torque is controlled to keep torque, and the rotating driving device corresponding to the first torque is controlled to gradually increase torque at a preset torque increasing speed, and the rotating angle of the plug is monitored in real time; wherein the friction value reflects the torque value required to drive the plug to rotate; When the rotating angle is equal to half of the absolute value of the opening degree difference value, the rotating driving device corresponding to the first torque is controlled to gradually decrease torque at the preset torque increasing speed. When the first torque is equal to the friction value again, the two rotating driving devices are controlled to reduce torque synchronously, and after the torque of the two rotating driving devices is reduced to 0, the pressing driving device is controlled to drive the plug to move the preset pressing distance in the locking direction, and a torque-angle correspondence relationship is obtained based on the real-time monitored torque difference and the rotation angle; wherein the locking direction is opposite to the unlocking direction, the torque difference is the difference between the first torque and the second torque, and the torque-angle correspondence relationship includes the torque difference and the rotation angle corresponding to each time node on a time axis.

7. The pneumatic full-gauge plug valve control method of claim 6, wherein, The state analysis information is obtained based on the predicted environment information and the adjustment control information, including: First analysis information is obtained based on the predicted environment information; wherein the first analysis information reflects the sealing performance of the plug; Second analysis information is obtained based on the torque-angle correspondence relationship; wherein the second analysis information reflects the wear performance of the plug; If the first analysis information and the second analysis information both reflect good performance, the state analysis information reflecting that the pneumatic full-path plug valve is in good condition is obtained; if the first analysis information and / or the second analysis information do not reflect good performance, the state analysis information reflecting that the pneumatic full-path plug valve is in an abnormal state is obtained.

8. The pneumatic full-gauge plug valve control method of claim 7, wherein, The first analysis information is obtained based on the predicted environment information, including: After the adjustment control information is executed, the value obtained by subtracting the predicted downstream flow from the predicted upstream flow is confirmed as a predicted difference value, and the range interval obtained by floating the predicted difference value by a preset range ratio is confirmed as a flow judgment range; Step d: obtaining an adjusted upstream flow and an adjusted downstream flow of the medium channel, and confirming the value obtained by subtracting the adjusted downstream flow from the adjusted upstream flow as an adjusted difference value; Step e: if the adjusted difference value is greater than the maximum value in the flow judgment range, the value obtained by adding a step pressing distance to the preset pressing distance is confirmed as a new preset pressing distance, and a pressing sealing instruction for controlling the pressing driving device to drive the plug to move the step pressing distance in the locking direction is obtained; after the pressing sealing instruction is executed, the steps d and e are repeated; if the adjusted difference value is located in the flow judgment range, the value obtained by subtracting 1 from the number of times of executing the step e is confirmed as a pressing adjustment number, and the value obtained by dividing the pressing adjustment number by a maximum adjustment number is confirmed as a sealing reflection value; wherein the maximum adjustment number is the value obtained by dividing a maximum adjustable distance by the step pressing distance, and the maximum adjustable distance reflects the maximum movement distance of the plug driven by the pressing driving device; If the sealing reflection value is less than or equal to a preset sealing ratio, the first analysis information reflecting that the sealing performance of the plug is good is obtained; if the sealing reflection value is greater than the preset sealing ratio, the first analysis information reflecting that the sealing performance of the plug is abnormal is obtained.

9. The pneumatic full-hole plug valve control method of claim 7, wherein, The second analysis information is obtained based on the torque-angle correspondence relationship, including: obtaining at least two rotation rates corresponding to the torque difference based on the torque angle correspondence relationship; subtracting a corresponding ideal rate from each of the rotation rates to obtain a value, and dividing the value by the corresponding ideal rate to obtain a wear analysis value; wherein the rotation rate and the corresponding ideal rate correspond to the same torque difference; if the wear analysis value is within a preset wear range, obtaining the second analysis information reflecting that the wear performance of the plug is good, and if the wear analysis value is not within the preset wear range, obtaining the second analysis information reflecting that the wear performance of the plug is abnormal.

Images