Self-powered intelligent network connection ball valve for adjusting fluid

Abstract

The invention discloses a self-powered intelligent network connection ball valve for adjusting fluid. The self-powered intelligent network connection ball valve comprises a ball valve body and an intelligent network connection control module arranged on the ball valve body. The ball valve body comprises a ball body, a rotating wheel arranged on the ball body, a transmission shaft connected with the rotating wheel and a generator connected with the transmission shaft. The generator is used for supplying power to the intelligent network connection control module; the intelligent network connection control module comprises a controller; the controller is used for adjusting the valve opening degree of the ball valve body. The pressure and the flow of the valve outlet can be more accurately controlled, and electric power can be provided for the intelligent network connection ball valve.

Description

Technical Field

[0001] The present invention relates to the field of valve design, and in particular to a self-powered intelligent networked ball valve for regulating fluid. Background Art

[0002] Excessive pressure in the pipeline is an important factor affecting pipeline leakage. Ball valves or control valves are usually used to reduce pressure. Ball valves or control valves control the flow, pressure or flow direction of the medium by rotating the ball or adjusting the position of the valve core, thereby achieving regulation or complete cutoff of the fluid system.

[0003] Patent application number US202118002718 is an energy recovery valve system with a spherical segmented valve, which is used to control the flow of fluid in a pipeline. Although this valve system for controlling the flow of fluid in a pipeline can collect energy and a guide plate is provided at the inlet of the valve to further improve the fluid flow regulation function of the ball valve, it still cannot accurately regulate the outlet flow and pressure.

[0004] Therefore, in order to solve the above problems, there is a need for a self-powered intelligent networked ball valve for regulating fluid, which can more accurately control the pressure and flow rate of the valve outlet. Summary of the invention

[0005] In view of this, an object of the present invention is to overcome the defects in the prior art and provide a self-powered intelligent networked ball valve for regulating fluid, which can more accurately control the pressure and flow rate of the valve outlet.

[0006] The intelligent networked ball valve for regulating fluid and self-powered of the present invention comprises a ball valve body and an intelligent networked control module arranged on the ball valve body;

[0007] The ball valve body includes a ball, a rotor disposed on the ball, a transmission shaft connected to the rotor, and a generator connected to the transmission shaft; the generator is used to supply power to the intelligent network control module;

[0008] The intelligent network control module includes a controller; the controller is used to adjust the valve opening of the ball valve body.

[0009] Furthermore, the transmission shaft is disposed through the valve stem, and the valve stem is a hollow structure.

[0010] Furthermore, the ball valve body also includes a metering interface and a pressure interface arranged on the ball.

[0011] Furthermore, a flow sensor is provided in the metering interface; a pressure sensor is provided in the pressure interface;

[0012] The signal output end of the flow sensor and the signal output end of the pressure sensor are both connected to the controller.

[0013] Further, adjusting the valve opening of the ball valve body specifically includes:

[0014] The deviation between the valve outlet pressure and the set value is used as the input signal of the controller, and the valve opening is used as the output signal of the controller;

[0015] The output signal is used to control the opening of the valve so that the valve outlet pressure is maintained at a certain set value.

[0016] Furthermore, the output and input of the controller are determined according to the following formula:

[0017]

[0018] Among them, K p represents the proportional coefficient, T1 represents the integral time constant, T D represents the differential time constant, u(t) represents the output of the controller, and e(t) represents the input of the controller.

[0019] Furthermore, the output of the controller is determined according to the following method:

[0020] Discretize equation (1) to obtain the following equation:

[0021]

[0022] Among them, T s represents the sampling time, e(k) represents the input of the controller at time k, and e(k-1) represents the input of the controller at time k-1;

[0023] From equation (1) and equation (2), we can get the control equation of position PID:

[0024]

[0025] Among them, u(k) represents the output at the kth sampling moment;

[0026] The position PID control form corresponding to equation (3) is converted into an incremental PID control form, and the output of the controller is the output Δu(k) between two sampling periods:

[0027]

[0028] Rewrite formula (4) as:

[0029] Δu(k)=(K P +K t +K D )e(k)-(K P +2KD )e(k-1)+K D e(k-2)(5)

[0030] Let A = K P +K t +K D , B=K P +2K D , C=K D ,

[0031] Then Δu(k)=Ae(k)-Be(k-1)+Ce(k-2).

[0032] Further, the flow coefficient C of the valve is determined according to the following formula: v :

[0033]

[0034] Among them, Q represents the flow rate, ρ represents the density of the fluid in the valve, ρ1 represents the density of the fluid under standard conditions, Δp represents the pressure difference between the inlet and outlet of the valve, and N is a constant.

[0035] Furthermore, the valve head loss h is determined according to the following formula: f :

[0036]

[0037] Among them, p1 represents the valve inlet pressure, p2 represents the valve outlet pressure, ρ is the fluid density, and g represents the gravitational acceleration.

[0038] Furthermore, the energy collection efficiency η is determined according to the following formula:

[0039]

[0040] Among them, P out is the shaft power of the runner, M represents the torque of the runner, and ω represents the angular velocity of the runner;

[0041] P is the total power, Δp is the pressure difference between the valve inlet and outlet, and Q is the flow rate.

[0042] The beneficial effects of the present invention are as follows: the present invention discloses a self-powered intelligent networked ball valve for regulating fluids, which combines turbines, ball valves and Internet of Things technology, and can not only reduce the pressure in the pipeline, but also collect energy in the fluid and convert it into electrical energy to provide power for the intelligent networked ball valve. At the same time, the outlet pressure and flow of the valve are monitored in real time through intelligent network control, and the valve opening is precisely adjusted, so that the pressure and flow of the valve outlet can be controlled more accurately, making up for the disadvantage of poor regulation effect of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0044] Figure 1 It is a schematic diagram of the valve opening control principle of the present invention;

[0045] Figure 2 It is a schematic diagram of the valve outlet pressure and flow control process of the present invention;

[0046] Figure 3 This is a cross-sectional view of the structure of the intelligent networked ball valve of the present invention;

[0047] Figure 4 It is a cross-sectional view of the metering interface and the pressure interface of the present invention;

[0048] Figure 5 It is a schematic diagram of valve closing of the present invention;

[0049] Figure 6 It is a schematic diagram of the valve opening of the present invention;

[0050] Among them, 1-wheel, 2-drive shaft, 3-generator, 4-sphere, 5-valve stem, 6-intelligent network control module, 7-battery, 8-metering interface, 9-pressure interface, 10-blade, 11-fluid inlet, 12-fluid outlet, 13-valve body, 14-bearing. DETAILED DESCRIPTION

[0051] The present invention is further described below in conjunction with the accompanying drawings, as shown in the drawings:

[0052] This embodiment discloses a self-powered intelligent networked ball valve for regulating fluid, including a ball valve body and an intelligent networked control module disposed on the ball valve body;

[0053] The ball valve body includes a ball, a rotor disposed on the ball, a transmission shaft connected to the rotor, and a generator connected to the transmission shaft; the generator is used to supply power to the intelligent network control module;

[0054] The intelligent network control module includes a controller; the controller is used to adjust the valve opening of the ball valve body.

[0055] The installation method of the intelligent network ball valve of the present invention is consistent with that of the traditional ball valve. When the intelligent network ball valve works normally, the fluid flows into the ball through the inlet and drives the rotor to rotate. The rotor drives the generator rotor through the transmission shaft. In this process, part of the energy of the fluid is converted into electrical energy, and the pressure in the pipeline is also reduced. The converted electrical energy is first stored in the battery and then supplied to the intelligent network control module. The battery is installed to provide stable current and store electrical energy to ensure the power supply of the intelligent network control module.

[0056] In this embodiment, the transmission shaft is arranged through the valve stem, and the valve stem is a hollow structure. Through the above-mentioned structural arrangement, the weight of the valve body can be effectively reduced and higher transmission efficiency can be provided. The hollow valve stem design allows the transmission shaft to be transmitted directly through the valve stem, avoiding complex external connection methods, simplifying the structure and improving stability. In addition, the hollow structure can reduce the use of materials, and is also conducive to optimizing the path of the fluid through the valve, reducing fluid resistance, and thus improving the overall efficiency of the system.

[0057] In this embodiment, the ball valve body also includes a metering interface and a pressure interface provided on the ball. The metering interface and the pressure interface can be used to provide real-time fluid state monitoring information. The metering interface can be used to accurately measure the fluid flow or other related parameters, so as to make more precise adjustments and optimizations. The pressure interface can be used to monitor the pressure changes in the pipeline in real time, ensure that the ball valve operates within a safe range, and prevent overpressure or system failure.

[0058] In this embodiment, a flow sensor is disposed in the metering interface; a pressure sensor is disposed in the pressure interface; and a signal output end of the flow sensor and a signal output end of the pressure sensor are both connected to the controller.

[0059] By setting up flow sensors and pressure sensors, the flow rate of the fluid and the pipeline pressure can be monitored in real time, providing data support for the intelligent control of the ball valve. The flow sensor can accurately measure the flow rate of the fluid, which is beneficial for the control system to adjust the opening of the ball valve according to the actual flow rate, thereby optimizing the flow control; while the pressure sensor can monitor the pressure changes in the pipeline in real time to ensure that the ball valve operates within a safe pressure range and avoid overpressure risks. The combination of the two enables the ball valve to be adjusted intelligently according to real-time data, improving the stability, safety and operating efficiency of the system.

[0060] Specifically, in Figure 3 In the figure, the wheel 1 is installed in the sphere 4 and is connected to the generator 3 through the transmission shaft 2. The transmission shaft 2 is installed under the sphere 4 and is provided in a hollow hole inside a bearing 14 and a valve stem 5 so that the transmission shaft 2 can rotate. The electric energy generated by the generator 3 is stored in the battery 7 and then supplied to the intelligent network control module 6.

[0061] exist Figure 4 In the embodiment, the metering interface 8 and the pressure interface 9 are arranged on the valve body 13 at the valve outlet, a flow sensor is installed in the metering interface 8, and a pressure sensor is installed in the pressure interface 9. The two sensors are connected to the intelligent network control module 6, and the valve outlet pressure and flow are transmitted to the terminal device in real time so that the operator can adjust the fluid flow.

[0062] like Figure 5 and Figure 6As shown, when the valve is opened, the fluid flows into the sphere from the fluid inlet 11, driving the impeller 1 to rotate, and the impeller 1 then drives the generator rotor through the transmission shaft 2 to convert part of the fluid energy into electrical energy. The operator can adjust the valve opening through the real-time data of flow and pressure transmitted by the intelligent network control module 6 to achieve precise fluid regulation effect.

[0063] In this embodiment, adjusting the valve opening of the ball valve body specifically includes:

[0064] The deviation between the valve outlet pressure and the set value is used as the input signal of the controller, and the valve opening is used as the output signal of the controller;

[0065] The output signal is used to control the opening of the valve so that the valve outlet pressure is maintained at a certain set value.

[0066] like Figure 1 As shown, the deviation value e = P2-P c , P1 and P2 are the valve inlet and outlet pressures respectively, P c is the setting value of the valve outlet pressure.

[0067] By precisely adjusting the valve opening, the outlet flow of the fluid passing through the valve can be directly affected, thereby adjusting the outlet pressure. By continuously adjusting the valve opening, the controller can keep the outlet pressure close to the set value, preventing the pressure from being too high or too low, thereby ensuring the stability and safety of the system. Real-time adjustment of the opening can also optimize the flow control of the fluid, improve the operating efficiency and response speed of the system, and ensure the precise management of industrial processes.

[0068] In this embodiment, the output and input of the controller are determined according to the following formula:

[0069]

[0070] Among them, K p represents the proportional coefficient, T1 represents the integral time constant, T D represents the differential time constant, u(t) represents the output of the controller, and e(t) represents the input of the controller.

[0071] Determine the output of the controller as follows:

[0072] Discretize equation (1) to obtain the following equation:

[0073]

[0074] Among them, T s represents the sampling time, e(k) represents the input of the controller at time k, and e(k-1) represents the input of the controller at time k-1;

[0075] From equation (1) and equation (2), we can get the control equation of position PID:

[0076]

[0077] Among them, u(k) represents the output at the kth sampling moment;

[0078] because Not only does it make the calculation cumbersome, but it also takes up a lot of memory and is inconvenient to use. According to the actual situation, the position PID control form corresponding to equation (3) is converted into an incremental PID control form. The output of the controller is the output Δu(k) between two sampling periods:

[0079]

[0080] Rewrite formula (4) as:

[0081] Δu(k)=(K P +K t +K D )e(k)-(K P +2K D )e(k-1)+K D e(k-2)(5)

[0082] Let A = K P +K t +K D , B=K P +2K D , C=K D ,

[0083] Then Δu(k)=Ae(k)-Be(k-1)+Ce(k-2).

[0084] If the incremental error Δu meets the accuracy requirements, the system stops adjusting and outputs the current value. The current error values ​​e(k-1) and e(k-2) are recorded in the memory to provide historical data for the next calculation, so that the system can adjust the valve opening according to this value, thereby achieving dynamic adjustment and control to ensure stable operation of the system; if it does not meet the accuracy requirements, the output volume continues to be generated and the valve is adjusted. In this way, the pressure at the valve outlet is controlled to be at a specific set value.

[0085] The present invention integrates valves, turbines and Internet of Things technology, which can not only regulate fluid flow, but also collect fluid energy, and provide a stable power supply for the intelligent network control module. By real-time monitoring of the ball valve outlet flow and pressure, the actual fluid flow and pressure flowing through the ball valve can be accurately determined, and the outlet pressure and flow can be more accurately regulated, making up for the disadvantage of poor ball valve regulation effect.

[0086] The performance of the valve mainly includes two aspects: fluid regulation function and energy collection function; the fluid regulation function includes the valve flow coefficient and head loss, and the energy collection function is mainly measured by the shaft power of the impeller and the energy collection efficiency.

[0087] Determine the valve flow coefficient C according to the following formula v :

[0088]

[0089] Where Q represents the flow rate (m 3 / h), ρ represents the density of the fluid in the valve (Kg / m 3 ), ρ1 represents the density of the fluid under standard conditions (Kg / m 3 ), Δp represents the pressure difference between the valve inlet and outlet (pa), N is a constant, and the value of N is 0.865.

[0090] The flow coefficient is an important parameter for calculating the flow characteristics of valves. The flow coefficient can be used to estimate the flow rate of the fluid according to the valve opening. The larger the flow coefficient, the greater the flow rate allowed by the valve at the same opening, that is, the better the flow characteristics of the valve.

[0091] Determine the valve head loss h according to the following formula f :

[0092]

[0093] Among them, p1 represents the valve inlet pressure, p2 represents the valve outlet pressure, ρ is the fluid density, and g represents the gravity acceleration (9.8m / s 2 ).

[0094] Valve head loss refers to the energy loss caused by the viscosity, inertia and boundary effects of the fluid when it passes through the valve. This energy loss is usually manifested in the form of pressure, which is manifested as a drop in pressure when the fluid passes through these components. The greater the head loss, the greater the pressure drop when the fluid passes through the valve. When designing, the total pressure loss needs to be accurately calculated to ensure that the system can provide enough pressure to meet the needs of the end user.

[0095] The energy collection efficiency η is determined according to the following formula:

[0096]

[0097] Among them, P out is the shaft power of the wheel, M represents the torque of the wheel, and ω represents the angular velocity of the wheel (rad / s);

[0098] P is the total power, Δp is the pressure difference between the valve inlet and outlet, and Q is the flow rate.

[0099] Shaft power refers to the mechanical power output by the impeller during its rotation. It is the process by which the impeller converts the kinetic energy generated by the fluid passing through the ball valve into usable mechanical energy. The magnitude of the shaft power directly affects the efficiency of energy collection and the output power of the system. The greater the shaft power, the more energy the impeller can output per unit time, and the higher the overall energy conversion efficiency and output power of the system may be.

[0100] Energy collection efficiency refers to the proportion of energy actually collected and converted into usable energy by the rotor, which reflects the degree to which the system converts the energy generated when the fluid passes through the ball valve into usable energy. The higher the efficiency value, the smaller the loss of the system during the energy conversion process, and the higher the efficiency of energy collection and conversion.

[0101] According to the above parameter values, the influence of valve opening on the energy collection characteristics and fluid regulation characteristics of the new ball valve (such as the intelligent networked ball valve of the present invention) can be analyzed. The appropriate opening range is obtained to maintain efficient energy collection characteristics while showing good fluid regulation performance. In addition, according to the shaft power and energy collection efficiency of the runner, by reasonably designing the parameters such as the size, shape, and material of the runner, the shaft power output can be increased, and the system structure can be optimized to improve the energy collection efficiency.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An intelligent networked ball valve for regulating fluid and self-powered, characterized in that: It includes a ball valve body and an intelligent network control module arranged on the ball valve body; The ball valve body includes a ball, a rotor disposed on the ball, a transmission shaft connected to the rotor, and a generator connected to the transmission shaft; the generator is used to supply power to the intelligent network control module; The intelligent network control module includes a controller; the controller is used to adjust the valve opening of the ball valve body.

2. The self-powered intelligent networked ball valve for regulating fluid according to claim 1, characterized in that: The transmission shaft is disposed through the valve stem, and the valve stem is a hollow structure.

3. The self-powered intelligent networked ball valve for regulating fluid according to claim 1, characterized in that: The ball valve body also includes a metering interface and a pressure interface arranged on the ball.

4. The self-powered intelligent networked ball valve for regulating fluid according to claim 3, characterized in that: A flow sensor is arranged in the metering interface; a pressure sensor is arranged in the pressure interface; The signal output end of the flow sensor and the signal output end of the pressure sensor are both connected to the controller.

5. The self-powered intelligent networked ball valve for regulating fluid according to claim 1, characterized in that: Adjust the valve opening of the ball valve body, including: The deviation between the valve outlet pressure and the set value is used as the input signal of the controller, and the valve opening is used as the output signal of the controller; The output signal is used to control the opening of the valve so that the valve outlet pressure is maintained at a certain set value.

6. The self-powered intelligent networked ball valve for regulating fluid according to claim 5, characterized in that: The output and input of the controller are determined according to the following formula: Among them, K p represents the proportional coefficient, T1 represents the integral time constant, T D represents the differential time constant, u(t) represents the output of the controller, and e(t) represents the input of the controller.

7. The self-powered intelligent networked ball valve for regulating fluid according to claim 6, characterized in that: Determine the output of the controller as follows: Discretize equation (1) to obtain the following equation: Among them, T s represents the sampling time, e(k) represents the input of the controller at time k, and e(k-1) represents the input of the controller at time k-1; From equation (1) and equation (2), we can get the control equation of position PID: Among them, u(k) represents the output at the kth sampling moment; The position PID control form corresponding to equation (3) is converted into an incremental PID control form, and the output of the controller is the output Δu(k) between two sampling periods: Rewrite formula (4) as: Δu(k)=(K P +K t +K D )e(k)-(K P +2K D )e(k-1)+K D e(k-2)(5) Let A = K P + K t + K D , B = K P + 2K D , C = K D , Then Δu(k)=Ae(k)-Be(k-1)+Ce(k-2).

8. The self-powered intelligent networked ball valve for regulating fluid according to claim 1, characterized in that: Determine the valve flow coefficient C according to the following formula v : Among them, Q represents the flow rate, ρ represents the density of the fluid in the valve, ρ1 represents the density of the fluid under standard conditions, Δp represents the pressure difference between the inlet and outlet of the valve, and N is a constant.

9. The self-powered intelligent networked ball valve for regulating fluid according to claim 1, characterized in that: Determine the valve head loss h according to the following formula f : Among them, p1 represents the valve inlet pressure, p2 represents the valve outlet pressure, ρ is the fluid density, and g represents the gravitational acceleration.

10. The self-powered intelligent networked ball valve for regulating fluid according to claim 1, characterized in that: The energy collection efficiency η is determined according to the following formula: Among them, P out is the shaft power of the runner, M represents the torque of the runner, and ω represents the angular velocity of the runner; P is the total power, Δp is the pressure difference between the valve inlet and outlet, and Q is the flow rate.

Images