Air valve control device capable of exhausting air under pressure

Abstract

The invention relates to the technical field of air valves, in particular to a pressure exhaust air valve control device which comprises a valve body. The valve cover support is connected with the valve body, a first cavity is formed by the valve cover support and the valve body, a large air inlet hole is formed in the center of the upper surface of the valve cover support in a penetrating mode, the first cavity is communicated with the outside, the valve cover is installed on the valve cover support, and a second cavity is formed by the valve cover and the upper side of the valve cover support; according to the air valve control device capable of exhausting air under pressure, through the arrangement of the exhaust adjusting assembly, the exhaust flow of the upper cavity is not larger than the inlet flow, and the situation that when the flow flowing out of the exhaust adjusting assembly on the valve deck is larger than the flow flowing in of a lower throttling hole, the pressure in the upper cavity cannot reach the needed pressure, and the pressure in the lower cavity cannot reach the needed pressure is avoided. And in the whole pressure exhaust process, due to the fact that the action area is large, the large valve clack is in a closed state all the time.

Description

Technical Field

[0001] The invention relates to the technical field of air valves, and in particular to a pressure-exhaust air valve control device. Background Art

[0002] At present, when operating within the working pressure range, the air valve needs to automatically and effectively discharge the gas in the pipeline (including large-flow discharge) to realize the functions of water filling and exhaust in empty pipes, exhaust within the working pressure range, and vacuum large-flow air replenishment.

[0003] The existing air valve control device is very difficult to exhaust under normal working pressure of the pipeline, and can only exhaust a small amount of air or no air. These problems have led to insufficient exhaust and widespread air blockage in the water supply pipeline, which not only increases the water supply energy consumption of the pipeline, but also increases the risk of water hammer and pipe burst, which not only affects the normal operation of the system, but also may cause safety hazards.

[0004] For example, the multifunctional pipeline explosion-proof valve and full-pressure high-speed exhaust valve disclosed in the patent application with publication number CN1114400A, the full-pressure high-speed exhaust valve disclosed in the patent application with publication number CN1254806A, the full-pressure high-speed exhaust valve disclosed in the patent application with publication number CN102705568A and the full-pressure high-speed exhaust valve disclosed in the patent application with publication number CN112728187A, in the above-mentioned full-pressure high-speed exhaust valve, only a pressure relief hole is set in the upper chamber, and there is no adjustment function. For a given exhaust valve, the area ratio of the piston (or diaphragm) in the upper and lower chambers to the exhaust valve disc is certain, and the resistance coefficient of the air intake channel between the upper and lower chambers is certain. If the size of the pressure relief hole of the upper chamber to the outside is fixed (the resistance coefficient is certain) Under this condition, it can only meet the exhaust and closing within a small pressure range, and cannot meet the full pressure exhaust and closing; under different pressure conditions of the pipeline, the pressure values ​​of the upper and lower chambers of the exhaust valve are different, and it cannot be guaranteed that the exhaust valve flaps are effectively opened for exhaust, or the problem of slow closing (causing drainage) occurs; in addition, when negative pressure appears in the pipeline, gas can only be injected into the pipeline through the exhaust valve port of the exhaust valve. In view of the large pressure exhaust flow rate, the exhaust diameter is generally not large, about 1 / 2-1 / 4 of the nominal diameter of the exhaust valve, and the gas injection flow rate will be affected by the exhaust diameter, and it is impossible to inject a large flow of gas with the same flow area as the nominal diameter of the exhaust valve into the pipeline, thereby increasing the vacuum degree during gas injection and increasing the risk of negative pressure water hammer and structural damage in the water supply pipeline. Among them, the multifunctional pipeline explosion-proof valve and full-pressure high-speed exhaust valve disclosed in the patent application with publication number CN1114400A and the full-pressure high-speed exhaust valve disclosed in the patent application with publication number CN1254806A are external pipes, which will freeze when the external temperature is lower than 0°C, which may cause the failure of the exhaust function. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an air valve control device with pressurized exhaust.

[0006] The present invention adopts the following technical scheme, a pressure exhaust air valve control device, comprising:

[0007] Valve body;

[0008] A valve cover bracket is connected to the valve body, the valve cover bracket and the valve body form a first chamber, and a large air inlet hole is opened through the center of the upper surface of the valve cover bracket to connect the first chamber with the outside;

[0009] A valve cover is mounted on the valve cover bracket, wherein the valve cover and the upper side of the valve cover bracket form a second chamber;

[0010] An exhaust assembly, comprising a sensing piston, a valve shaft, a guide cylinder sleeve, an exhaust valve disc and a float pilot assembly, wherein the guide cylinder sleeve is arranged in the valve cover, the sensing piston is arranged in the guide cylinder sleeve, one end of the valve shaft extends into the guide cylinder sleeve and is fixedly connected to the sensing piston, the exhaust valve disc and the float pilot assembly are both arranged on the valve shaft and are fixedly connected to the valve shaft and move in conjunction with the valve shaft, wherein the float pilot assembly is located at the lower part of the valve shaft, and the exhaust valve disc is located above the float pilot assembly and below the large valve disc;

[0011] The air intake component comprises a large valve flap and an exhaust rubber valve seat. The large valve flap is connected to the valve shaft. An exhaust port is provided at the center of the large valve flap, and an exhaust rubber valve seat is provided in the exhaust port.

[0012] As a further description of the above technical solution: the exhaust valve flap and the exhaust rubber valve seat form an exhaust sealing pair for sealing the exhaust port.

[0013] As a further description of the above technical solution: a central through hole is arranged on the valve shaft, the central through hole connects the upper chamber of the second chamber and the first chamber, and a lower throttling hole is arranged at the lower end of the central through hole.

[0014] As a further description of the above technical solution: the float pilot assembly is arranged in the first chamber, and the float pilot assembly includes a positioning assembly, a float, a sealing rubber seat, a connecting rod and a floating sleeve;

[0015] The positioning assembly is composed of an upper cylinder and a lower cylinder connected together, the upper cylinder is fixed on the valve shaft and is located below the exhaust valve disc, the sealing rubber seat and the connecting rod are arranged in the lower cylinder, and the sealing rubber seat is provided with a limiting protrusion that moves downward;

[0016] The floating sleeve is fixed in the first chamber, the floating ball is arranged in the floating sleeve, the lower end of the sealing rubber seat is fixedly connected with the floating ball through the connecting rod, and large through holes are arranged around the upper part of the floating sleeve, and a small number of small through holes are arranged at the lower part.

[0017] As a further description of the above technical solution: a pin is embedded and fixed on the upper end of the sealing rubber seat, and the pin and the lower throttling hole set at the lower end of the valve shaft form a sealing pair for the central through hole, separating the upper chamber of the second chamber and the first chamber.

[0018] As a further description of the above technical solution: the large valve flap can move up and down on the valve shaft, and an air inlet sealing surface is arranged around the outer side of the large valve flap. The air inlet sealing surface and the large valve flap form a sealing pair of a large air inlet hole, which is used to seal the large air inlet hole.

[0019] As a further description of the above technical solution: an exhaust adjustment component is arranged on the upper surface of the valve cover and is connected to the outside world, and the exhaust adjustment component includes a throttle hole plug, an adjusting screw and a protective cover. The throttle hole plug is embedded and fixed on the valve cover, an upper throttle hole is arranged at the center position of the throttle hole plug, the inlet of the upper throttle hole is connected to the upper chamber of the second chamber, the adjusting screw is arranged at the outlet of the upper throttle hole, the protective cover is arranged on the outside of the adjusting screw, and a leakage flow hole is arranged on the outer wall of the throttle hole plug and is connected to the outside world.

[0020] As a further description of the above technical solution: it also includes an exhaust control system, which is arranged on the valve cover, and the exhaust control system includes:

[0021] A data acquisition module, used to collect historical air valve operation data, wherein the historical air valve operation data is collected when the air valve is working stably, and the historical air valve operation data includes external environment temperature, air intake flow rate of the valve body and comprehensive parameters of the valve body, and exhaust flow rate of the exhaust regulating component, wherein the comprehensive parameters of the valve body include valve body material, valve body size and channel cross-sectional area, wherein the valve body size includes valve body length, width and height;

[0022] Model training module, which trains a machine learning model for predicting the exhaust flow of the exhaust regulating component based on historical air valve operation data, collects real-time external ambient temperature, valve body intake flow and valve body comprehensive parameters, and predicts the exhaust flow of the exhaust regulating component based on the trained machine learning model;

[0023] The flow correction module collects the exhaust flow of the exhaust regulating component in real time and compares the real-time exhaust flow with the predicted exhaust flow, obtains the flow decay value, compares and analyzes the flow decay value with the preset safety flow decay threshold, and generates a flow adjustment instruction.

[0024] As a further description of the above technical solution: the method for training a machine learning model for predicting the exhaust flow of an exhaust regulating component includes:

[0025] Convert the collected historical air valve operation data into a corresponding set of feature vectors;

[0026] The external ambient temperature, the intake flow rate of the valve body and the comprehensive parameters of the valve body in the historical air valve operation data are used as inputs of the machine learning model. The machine learning model uses the exhaust flow rate of the exhaust regulating component corresponding to each set of external ambient temperature, the intake flow rate of the valve body and the comprehensive parameters of the valve body as output, and uses the exhaust flow rate of the exhaust regulating component actually corresponding to each set of external ambient temperature, the intake flow rate of the valve body and the comprehensive parameters of the valve body as the prediction target. Minimizing the loss function value of the machine learning model is used as the training target, and the training is stopped when the loss function value of the machine learning model is less than or equal to the preset target loss value.

[0027] As a further description of the above technical solution: the expression of the flow decay value is:

[0028] LLSB = SS11-YC11;

[0029] Where LLSB is the flow decay value, SSll is the exhaust flow of the exhaust adjustment component collected in real time, and YCll is the predicted exhaust flow;

[0030] The flow adjustment instruction includes a first adjustment instruction, a second adjustment instruction, a third adjustment instruction and a fourth adjustment instruction, wherein the first adjustment instruction and the second adjustment instruction are both exhaust flow increase adjustment instructions, and the exhaust flow increase amounts thereof are successively reduced, and the third adjustment instruction and the fourth adjustment instruction are exhaust flow reduction adjustment instructions, and the exhaust flow reduction amounts thereof are successively increased;

[0031] The method of comparing and analyzing the flow decay value with a preset safety flow decay threshold and generating a flow adjustment instruction includes:

[0032] Preset safety flow decay thresholds LL1, LL2, LL3 and LL4, where LL1<LL2<0<LL3<LL4;

[0033] When LLSB<LL1, a first adjustment instruction is generated;

[0034] When LL1≤LLSB<LL2, a second adjustment instruction is generated;

[0035] When LL2≤LLSB<LL3, no flow adjustment instruction is generated;

[0036] When LL3≤LLSB<LL4, a third adjustment instruction is generated;

[0037] When LL4≤LLSB, a fourth adjustment instruction is generated.

[0038] Beneficial effects:

[0039] The present invention provides an air valve control device for pressurized exhaust. By setting an exhaust regulating component, the exhaust flow rate of the upper chamber is not greater than the inlet flow rate, so as to avoid the problem that when the flow rate outflowing from the exhaust regulating component on the valve cover is greater than the flow rate inflowing into the lower throttle hole, the pressure in the upper chamber cannot reach the required pressure and exhaust cannot be performed. In addition, during the entire pressure exhaust process, the large valve flap is always in a closed state due to its large effective area. After exhaust, the gas in the first chamber is reduced. When the float rises and seals the lower throttle hole, the pressure in the upper chamber is reduced. When the upward force of the exhaust valve flap is higher than the downward force of the sensing piston, the valve is automatically closed. When vacuum occurs in the water supply pipeline, the pressure in the valve body is also in a vacuum state. The large valve flap opens under the action of atmospheric pressure and injects air into the valve body and enters the water supply pipeline. Because the flow area of ​​the large valve flap is not less than the tolerance diameter area of ​​the valve, the vacuum gas injection amount is large and the vacuum degree is small, thereby reducing the insufficient exhaust and gas blockage of the water supply pipeline, reducing the water supply energy consumption of the pipeline, and reducing the risk of pipeline water hammer and pipe burst.

[0040] Furthermore, by collecting historical air valve operation data, a machine learning model for predicting the exhaust flow of the exhaust regulating component is trained based on the historical air valve operation data, the real-time external ambient temperature, the intake flow of the valve body and the comprehensive parameters of the valve body are collected, and the exhaust flow of the exhaust regulating component is predicted based on the trained machine learning model. The exhaust flow of the exhaust regulating component is collected in real time and the real-time exhaust flow is compared with the predicted exhaust flow, the flow decay value is obtained, the flow decay value is compared and analyzed with the preset safety flow decay threshold, and a flow adjustment instruction is generated, thereby realizing real-time dynamic adjustment of the exhaust flow of the exhaust regulating component to avoid the problem that when the flow out of the exhaust regulating component on the valve cover is greater than the flow inflow of the lower throttle hole, the pressure in the upper chamber does not reach the required pressure and the exhaust cannot be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0042] Figure 1 A schematic structural diagram of an air valve control device with pressurized exhaust provided by an embodiment of the present invention;

[0043] Figure 2 A cross-sectional view of an air valve control device with pressurized exhaust provided by an embodiment of the present invention;

[0044] Figure 3 The embodiment of the present invention provides Figure 2 A magnified view of area A in;

[0045] Figure 4 A schematic structural diagram of a valve cover bracket is provided for an embodiment of the present invention;

[0046] Figure 5 A schematic diagram of the structure of a large valve flap provided in an embodiment of the present invention;

[0047] Figure 6 A cross-sectional schematic diagram of an air valve control device with pressurized exhaust provided by an embodiment of the present invention;

[0048] Figure 7 A schematic diagram of the structure of an exhaust adjustment assembly provided in an embodiment of the present invention;

[0049] Figure 8 A schematic diagram of module connections of an exhaust control system provided in an embodiment of the present invention.

[0050] Figure numerals: 2, floating sleeve; 3, floating ball; 301, upper cylinder; 302, lower cylinder; 31, sealing rubber seat; 312, pin rod; 32, connecting rod; 5, valve body; 501, first chamber; 7, exhaust valve disc; 8, exhaust rubber valve seat; 10, valve cover bracket; 11, valve shaft; 111, center through hole; 112, lower throttle hole; 13, exhaust adjustment assembly; 131, throttle hole plug; 132, upper throttle hole; 133, adjusting screw; 134, protective cover; 135, leakage flow hole; 15, valve cover; 151, second chamber; 16, induction piston; 18, guide cylinder sleeve; 23, large valve disc. DETAILED DESCRIPTION

[0051] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below with reference to specific diagrams. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0052] Example 1

[0053] See also Figure 1-Figure 6 The embodiment of the present invention provides a technical solution: an air valve control device with pressurized exhaust, comprising:

[0054] Valve body 5;

[0055] The valve cover bracket 10 is connected to the valve body 5. The valve cover bracket 10 and the valve body 5 form a first chamber 501. A large air inlet hole is provided through the center of the upper surface of the valve cover bracket 10 to connect the first chamber 501 with the outside.

[0056] The valve cover 15 is mounted on the valve cover bracket 10, and the valve cover 15 and the upper side of the valve cover bracket 10 form a second chamber 151;

[0057] The exhaust assembly includes a sensing piston 16, a valve shaft 11, a guide cylinder sleeve 18, an exhaust valve disc 7 and a floating ball pilot assembly. The guide cylinder sleeve 18 is arranged in the valve cover 15, the sensing piston 16 is arranged in the guide cylinder sleeve 18, one end of the valve shaft 11 extends into the guide cylinder sleeve 18 and is fixedly connected to the sensing piston 16, the exhaust valve disc 7 and the floating ball pilot assembly are both arranged on the valve shaft 11 and are fixedly connected to the valve shaft 11 and move with the valve shaft 11, wherein the floating ball pilot assembly is located at the lower part of the valve shaft 11, and the exhaust valve disc 7 is located above the floating ball pilot assembly and below the large valve disc 23;

[0058] The air intake assembly includes a large valve flap 23 and an exhaust rubber valve seat 8. The large valve flap 23 is connected to the valve shaft 11. An exhaust port is provided at the center of the large valve flap 23, and the exhaust rubber valve seat 8 is provided in the exhaust port.

[0059] The exhaust valve flap 7 and the exhaust rubber valve seat 8 form an exhaust sealing pair for sealing the exhaust port.

[0060] A central through hole 111 is provided on the valve shaft 11 , and the central through hole 111 communicates with the upper chamber of the second chamber 151 and the first chamber 501 . A lower throttling hole 112 is provided at the lower end of the central through hole 111 .

[0061] The float pilot assembly is arranged in the first chamber 501, and the float pilot assembly includes a positioning assembly, a float 3, a sealing rubber seat 31, a connecting rod 32 and a floating sleeve 2;

[0062] The positioning assembly is composed of an upper cylinder 301 and a lower cylinder 302. The upper cylinder 301 is fixed on the valve shaft 11 and is located below the exhaust valve disc 7. The sealing rubber seat 31 and the connecting rod 32 are arranged in the lower cylinder 302, and the sealing rubber seat 31 is provided with a limiting protrusion for downward movement.

[0063] The floating sleeve 2 is fixed in the first chamber 501, the floating ball 3 is arranged in the floating sleeve 2, the lower end of the sealing rubber seat 31 is fixedly connected to the floating ball 3 through the connecting rod 32, and the upper part of the floating sleeve 2 is provided with large through holes around, and the lower part is provided with a small number of small through holes.

[0064] A pin rod 312 is embedded and fixed at the upper end of the sealing rubber seat 31 , and the pin rod 312 and the lower throttle hole 112 set at the lower end of the valve shaft 11 form a sealing pair for the central through hole 111 to separate the upper chamber of the second chamber 151 and the first chamber 501 .

[0065] The large valve flap 23 can move up and down on the valve shaft 11. An air inlet sealing surface is arranged around the outer side of the large valve flap 23. The air inlet sealing surface and the large valve flap 23 form a sealing pair of the large air inlet hole for blocking the large air inlet hole.

[0066] An exhaust regulating assembly 13 is arranged on the upper surface of the valve cover 15 and is connected to the outside. The exhaust regulating assembly 13 includes a throttle plug 131, an adjusting screw 133 and a protective cover 134. The throttle plug 131 is embedded and fixed on the valve cover 15. An upper throttle hole 132 is arranged at the center of the throttle plug 131. The inlet of the upper throttle hole 132 is connected to the upper chamber of the second chamber 151. An adjusting screw 133 is arranged at the outlet of the upper throttle hole 132. The protective cover 134 is arranged on the outside of the adjusting screw 133. A leakage flow hole 135 is arranged on the outer wall of the throttle plug 131 and is connected to the outside.

[0067] In this embodiment, exhaust is performed externally: when the gas in the valve body 5 increases, the water level drops, and the buoyancy of the float 3 is reduced. When the difference between the gravity and the buoyancy exceeds the sealing force of the gas pressure in the first chamber 501 on the contact area of ​​the lower throttle hole 112, the sealing rubber on the upper part of the float 3 is separated from the lower throttle hole 112, and the pressurized gas first enters the central through hole 111 of the valve shaft 11, and is transmitted to the upper chamber of the second chamber 151 (wherein the upper chamber of the second chamber 151 is the upper space of the sensing piston 16), so that the pressure in the upper chamber starts to increase from zero. At this time, the upper side of the sensing piston 16 begins to be pushed downward by the pressure in the upper chamber. When the force of the upper chamber pressure on the sensing piston 16 exceeds the upward force of the exhaust valve flap 7 on the exhaust valve flap 7 by the pressure of the first chamber 501, the exhaust valve flap 7 is separated from the exhaust rubber valve seat 8, and the pressure is exhausted outward;

[0068] When the force exerted by the upper chamber pressure on the sensing piston 16 is smaller than the upward force exerted by the pressure of the first chamber 501 on the exhaust valve flap 7, the exhaust valve flap 7 cannot be separated from the exhaust rubber valve seat 8 and exhaust gas is discharged outwardly. This situation is divided into two working conditions, namely, one working condition is that when the gas in the valve body 5 is transmitted to the upper chamber, the amount of gas supplemented below the valve body 5 is insufficient, the gas is reduced and the liquid level rises, causing the float 3 to rise, blocking the lower throttle hole 112 again, causing the pressure in the upper chamber to drop. This working condition is reasonable. The other working condition is that when the flow rate outflowing from the exhaust adjustment component 13 on the valve cover 15 is greater than the flow rate inflowing from the lower throttle hole 112, the pressure in the upper chamber cannot reach the required pressure and cannot be exhausted. This situation is unreasonable.

[0069] The way to avoid this situation is to use the exhaust adjustment component 13 to make the exhaust flow of the upper chamber not greater than the inlet flow. For a valve with a fixed small throttle, the external exhaust flow is different due to the different pressures in the first chamber 501. Only through adjustment can the requirement of external pressure exhaust be met under different pressure conditions. During the entire pressure exhaust process, the large valve flap 23 is always in a closed state due to its large effective area.

[0070] After exhaust, the gas in the first chamber 501 decreases, and when the float 3 rises to seal the lower throttle hole 112, the pressure in the upper chamber decreases, so that the upward force of the exhaust valve flap 7 is greater than the downward force of the sensing piston 16, and the valve closes automatically.

[0071] When a vacuum occurs in the water supply pipeline, the pressure in the valve body 5 is also in a vacuum state, and the large valve flap 23 opens under the action of atmospheric pressure, injecting air into the valve body 5 and into the water supply pipeline. Since the flow area of ​​the large valve flap 23 is not less than the tolerance path area of ​​the valve, the vacuum injection volume is large and the vacuum degree is small. Among them, the tolerance path area of ​​the valve refers to the size tolerance range of the valve channel (usually the fluid channel of the valve) and the area of ​​the fluid passing through the channel. The tolerance path area is a comprehensive indicator that describes the ability of the valve to pass fluid, and also reflects the impact of manufacturing accuracy on fluid flow and valve performance. By controlling the tolerance, the sealing, flow control ability and operational stability of the valve in actual use can be ensured.

[0072] Example 2

[0073] An air valve control device with pressurized exhaust is also provided with a pressure sensor assembly, including a pressure sensor and a remote communication system. The pressure sensor assembly is arranged on the valve cover 15, and senses the pressure in the upper chamber of the second chamber 151. When there is no exhaust, the pressure in the upper chamber is zero. When exhausting, the pressure in the upper chamber rises, which is sensed by the pressure sensor and transmitted to the platform through the remote communication system. When no signal is received for a certain period of time, an alarm is issued for maintenance and inspection. The frequency and number of exhaust can also be counted to diagnose the health of the water supply pipeline, thereby avoiding the increase in energy consumption and the probability of water hammer caused by air blockage in the water supply pipeline.

[0074] Example 3

[0075] See also Figure 1-Figure 8 , this embodiment further adds an exhaust control system based on the above embodiment;

[0076] The exhaust control system is arranged on the valve cover 15, and the exhaust control system comprises:

[0077] The data acquisition module is used to collect historical air valve operation data, wherein the historical air valve operation data is collected when the air valve is working stably, and the historical air valve operation data includes the external environment temperature, the intake flow rate of the valve body 5 and the comprehensive parameters of the valve body, and the exhaust flow rate of the exhaust regulating component 13, wherein the comprehensive parameters of the valve body include the valve body material, valve body size and channel cross-sectional area, wherein the valve body size includes the valve body length, width and height.

[0078] The model training module trains a machine learning model for predicting the exhaust flow of the exhaust regulating component 13 based on historical air valve operation data, collects real-time external ambient temperature, the intake flow of the valve body 5 and the comprehensive parameters of the valve body, and predicts the exhaust flow of the exhaust regulating component 13 based on the trained machine learning model;

[0079] The method for training a machine learning model for predicting the exhaust flow rate of the exhaust adjustment component 13 includes:

[0080] Convert the collected historical air valve operation data into a corresponding set of feature vectors;

[0081] The external ambient temperature, the intake flow rate of the valve body 5 and the comprehensive parameters of the valve body in the historical air valve operation data are used as inputs of the machine learning model. The machine learning model uses the exhaust flow rate of the exhaust regulating component 13 corresponding to each set of the external ambient temperature, the intake flow rate of the valve body 5 and the comprehensive parameters of the valve body as output, and uses the exhaust flow rate of the exhaust regulating component 13 actually corresponding to each set of the external ambient temperature, the intake flow rate of the valve body 5 and the comprehensive parameters of the valve body as the prediction target. Minimizing the loss function value of the machine learning model is used as the training target, and the training is stopped when the loss function value of the machine learning model is less than or equal to the preset target loss value.

[0082] The machine learning model is any one of a deep neural network model and a deep belief network model, and the loss function value of the machine learning model is a mean square error;

[0083] Mean square error is one of the commonly used loss functions. Minimization is used as the goal to train the model so that the first machine learning model better fits the data, thereby improving the performance and accuracy of the model;

[0084] In the loss function, MSE1 is the loss function value of the machine learning model, x is the feature vector group number; m is the number of feature vector groups; y is the number of feature vector groups; x is the exhaust flow rate of the exhaust adjustment component 13 corresponding to the xth group of characteristic vectors, is the exhaust flow rate of the exhaust regulating component 13 corresponding to the xth group of characteristic vectors in real time;

[0085] Other model parameters of the machine learning model, target loss value, optimization algorithm, training set test set validation set ratio, and loss function optimization are all achieved through actual engineering implementation and continuous experimental tuning.

[0086] The flow correction module collects the exhaust flow of the exhaust adjustment component 13 in real time and compares the real-time exhaust flow with the predicted exhaust flow, obtains the flow decay value, compares and analyzes the flow decay value with the preset safety flow decay threshold, and generates a flow adjustment instruction;

[0087] The expression of the flow decay value is: LLSB=SSll-YCll, where LLSB is the flow decay value, SSll is the exhaust flow of the exhaust adjustment component 13 collected in real time, and YCll is the predicted exhaust flow;

[0088] The flow adjustment instruction includes a first adjustment instruction, a second adjustment instruction, a third adjustment instruction and a fourth adjustment instruction, wherein the first adjustment instruction and the second adjustment instruction are both exhaust flow increase adjustment instructions, and the exhaust flow increase amounts thereof decrease successively, and the third adjustment instruction and the fourth adjustment instruction are exhaust flow decrease adjustment instructions, and the exhaust flow decrease amounts thereof increase successively.

[0089] The method of comparing and analyzing the flow decay value with a preset safety flow decay threshold and generating a flow adjustment instruction includes:

[0090] Preset safety flow decay thresholds LL1, LL2, LL3 and LL4, where LL1<LL2<0<LL3<LL4;

[0091] When LLSB<LL1, a first adjustment instruction is generated;

[0092] When LL1≤LLSB<LL2, a second adjustment instruction is generated;

[0093] When LL2≤LLSB<LL3, no flow adjustment instruction is generated;

[0094] When LL3≤LLSB<LL4, a third adjustment instruction is generated;

[0095] When LL4≤LLSB, a fourth adjustment instruction is generated.

[0096] In this embodiment, historical air valve operation data is collected, a machine learning model for predicting the exhaust flow of the exhaust regulating component 13 is trained based on the historical air valve operation data, the real-time external ambient temperature, the intake flow of the valve body 5 and the comprehensive parameters of the valve body are collected, the exhaust flow of the exhaust regulating component 13 is predicted based on the trained machine learning model, the exhaust flow of the exhaust regulating component 13 is collected in real time and the real-time exhaust flow is compared with the predicted exhaust flow, the flow decay value is obtained, the flow decay value is compared and analyzed with the preset safety flow decay threshold, and a flow adjustment instruction is generated, thereby realizing real-time dynamic adjustment of the exhaust flow of the exhaust regulating component 13, avoiding the problem that when the flow out of the exhaust regulating component 13 on the valve cover 15 is greater than the flow inflow of the lower throttle hole 112, the pressure in the upper cavity cannot reach the required pressure and the exhaust cannot be exhausted.

[0097] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and the description in the specification are only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An air valve control device with pressurized exhaust, characterized in that: include: Valve body (5); A valve cover bracket (10) is connected to the valve body (5), the valve cover bracket (10) and the valve body (5) forming a first chamber (501), and a large air inlet hole is provided through the center of the upper surface of the valve cover bracket (10) to connect the first chamber (501) with the outside; A valve cover (15) is mounted on the valve cover bracket (10), wherein the valve cover (15) and an upper side of the valve cover bracket (10) form a second chamber (151); An exhaust assembly comprises a sensing piston (16), a valve shaft (11), a guide cylinder sleeve (18), an exhaust valve disc (7) and a floating ball pilot assembly, wherein the guide cylinder sleeve (18) is arranged in a valve cover (15), the sensing piston (16) is arranged in the guide cylinder sleeve (18), one end of the valve shaft (11) extends into the guide cylinder sleeve (18) and is fixedly connected to the sensing piston (16), and the exhaust valve disc (7) and the floating ball pilot assembly are both arranged on the valve shaft (11); The air intake assembly comprises a large valve flap (23) and an exhaust rubber valve seat (8), wherein the large valve flap (23) is connected to a valve shaft (11), an exhaust port is provided at the center of the large valve flap (23), and an exhaust rubber valve seat (8) is provided in the exhaust port.

2. The air valve control device with pressurized exhaust according to claim 1, characterized in that: The exhaust valve flap (7) and the exhaust rubber valve seat (8) form an exhaust sealing pair for sealing the exhaust port.

3. The air valve control device with pressurized exhaust according to claim 1, characterized in that: A central through hole (111) is provided on the valve shaft (11), the central through hole (111) being connected to the upper chamber of the second chamber (151) and the first chamber (501), and a lower throttling hole (112) is provided at the lower end of the central through hole (111).

4. The air valve control device with pressurized exhaust according to claim 3, characterized in that: The float pilot assembly is arranged in the first chamber (501), and comprises a positioning assembly, a float (3), a sealing rubber seat (31), a connecting rod (32) and a floating sleeve (2); The positioning assembly is composed of an upper cylinder (301) and a lower cylinder (302) connected together, the upper cylinder (301) is fixed on the valve shaft (11) and is located below the exhaust valve flap (7), the sealing rubber seat (31) and the connecting rod (32) are arranged in the lower cylinder (302), and the sealing rubber seat (31) is provided with a limiting protrusion that moves downward; The floating sleeve (2) is fixed in the first chamber (501), the floating ball (3) is arranged in the floating sleeve (2), the lower end of the sealing rubber seat (31) is fixedly connected to the floating ball (3) through the connecting rod (32), and the upper part of the floating sleeve (2) is provided with large through holes around it, and the lower part is provided with small through holes.

5. The air valve control device with pressurized exhaust according to claim 4, characterized in that: A pin rod (312) is embedded and fixed at the upper end of the sealing rubber seat (31), and the pin rod (312) and the lower throttling hole (112) provided at the lower end of the valve shaft (11) form a sealing pair for the central through hole (111), separating the upper chamber of the second chamber (151) and the first chamber (501).

6. The air valve control device with pressurized exhaust according to claim 1, characterized in that: The large valve flap (23) can move up and down on the valve shaft (11), and air inlet sealing surfaces are arranged around the outer side of the large valve flap (23). The air inlet sealing surface and the large valve flap (23) form a sealing pair of the large air inlet hole, which is used to block the large air inlet hole.

7. The air valve control device with pressurized exhaust according to claim 1, characterized in that: An exhaust regulating assembly (13) is arranged on the upper surface of the valve cover (15) and is in communication with the outside. The exhaust regulating assembly (13) comprises a throttle plug (131), an adjusting screw (133) and a protective cover (134). The throttle plug (131) is embedded and fixed on the valve cover (15). An upper throttle hole (132) is arranged at the center of the throttle plug (131). The inlet of the upper throttle hole (132) is in communication with the upper chamber of the second chamber (151). The adjusting screw (133) is arranged at the outlet of the upper throttle hole (132). The protective cover (134) is arranged on the outer side of the adjusting screw (133). A discharge flow hole (135) is arranged on the outer wall of the throttle plug (131) and is in communication with the outside.

8. The air valve control device with pressurized exhaust according to claim 7, characterized in that: It also includes an exhaust control system, which is arranged on the valve cover (15) and includes: A data acquisition module, for acquiring historical air valve operation data, wherein the historical air valve operation data is acquired when the air valve is in stable operation, and the historical air valve operation data includes an external environment temperature, an intake flow rate of a valve body (5) and valve body comprehensive parameters, and an exhaust flow rate of an exhaust regulating component (13), wherein the valve body comprehensive parameters include valve body material, valve body size, and channel cross-sectional area, wherein the valve body size includes valve body length, width, and height; A model training module, which trains a machine learning model for predicting the exhaust flow rate of the exhaust regulating component (13) based on historical air valve operation data, collects real-time external environment temperature, the intake flow rate of the valve body (5) and the comprehensive parameters of the valve body, and predicts the exhaust flow rate of the exhaust regulating component (13) based on the trained machine learning model; The flow correction module collects the exhaust flow of the exhaust adjustment component (13) in real time and compares the real-time exhaust flow with the predicted exhaust flow, obtains the flow decay value, compares and analyzes the flow decay value with a preset safe flow decay threshold, and generates a flow adjustment instruction.

9. The air valve control device with pressurized exhaust according to claim 8, characterized in that: The method of training a machine learning model for predicting the exhaust flow of an exhaust adjustment component (13) includes: Convert the collected historical air valve operation data into a corresponding set of feature vectors; The external environment temperature, the intake flow rate of the valve body (5) and the comprehensive parameters of the valve body in the historical air valve operation data are used as inputs of the machine learning model. The machine learning model uses the exhaust flow rate of the exhaust regulating component (13) corresponding to each set of the external environment temperature, the intake flow rate of the valve body (5) and the comprehensive parameters of the valve body as output, and uses the exhaust flow rate of the exhaust regulating component (13) actually corresponding to each set of the external environment temperature, the intake flow rate of the valve body (5) and the comprehensive parameters of the valve body as the prediction target, and uses minimizing the loss function value of the machine learning model as the training target. When the loss function value of the machine learning model is less than or equal to the preset target loss value, the training is stopped.

10. The air valve control device with pressurized exhaust according to claim 8, characterized in that: The expression of the flow decay value is: LLSB = SS11-YC11; Wherein LLSB is the flow decay value, SSll is the exhaust flow collected in real time by the exhaust adjustment component (13), and YCll is the predicted exhaust flow; The flow adjustment instruction includes a first adjustment instruction, a second adjustment instruction, a third adjustment instruction and a fourth adjustment instruction, wherein the first adjustment instruction and the second adjustment instruction are both exhaust flow increase adjustment instructions, and the exhaust flow increase amounts thereof are successively reduced, and the third adjustment instruction and the fourth adjustment instruction are exhaust flow reduction adjustment instructions, and the exhaust flow reduction amounts thereof are successively increased; The method of comparing and analyzing the flow decay value with a preset safety flow decay threshold and generating a flow adjustment instruction includes: Preset safety flow decay thresholds LL1, LL2, LL3 and LL4, where LL1<LL2<0<LL3<LL4; When LLSB<LL1, a first adjustment instruction is generated; When LL1≤LLSB<LL2, a second adjustment instruction is generated; When LL2≤LLSB<LL3, no flow adjustment instruction is generated; When LL3≤LLSB<LL4, a third adjustment instruction is generated; When LL4≤LLSB, a fourth adjustment instruction is generated.

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