Explosion-proof pneumatic control valve

Abstract

The utility model discloses an explosion-proof pneumatic control valve, which relates to the technical field of pneumatic valves and comprises a seat valve body, an explosion-proof pneumatic actuator, a first explosion-proof temperature transmitter, a second explosion-proof temperature transmitter, a first explosion-proof pressure transmitter, a second explosion-proof pressure transmitter and a controller. A first flame-proof pressure transmitter is arranged at an inlet of the seat valve body, and a second flame-proof pressure transmitter is arranged at an outlet of the seat valve body; the first flame-proof pressure transmitter, the main control unit second flame-proof pressure transmitter, the main control unit first flame-proof temperature transmitter and the main control unit second flame-proof temperature transmitter are connected with the controller through cables; the controller is in communication connection with the explosion-proof pneumatic actuator, and the explosion-proof pneumatic actuator is connected with the seat valve body. According to the utility model, various explosion-proof structures are used, so that the explosion-proof electrical performance is realized, and the explosion-proof switch can be applied to occasions with explosion-proof requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic valves, in particular to an explosion-proof pneumatic regulating valve. Background Art

[0002] In the context of dual carbon emissions, energy conservation in fluid systems is an unavoidable topic. Whether it's the fluid distribution systems in large urban buildings or industrial fluid systems, high production energy consumption, pressure imbalances, and large flow fluctuations are common phenomena, which easily lead to significant energy waste in the distribution system. The use of valve control technology is an effective way to address pressure and flow fluctuations.

[0003] The mechanical self-operated pressure-stabilizing valves currently widely used in the market clearly cannot fully meet the control needs of production and daily life. Their shortcomings, including low flow capacity, narrow dynamic pressure differential control range, inflexible application, high resistance, and inability to detect and control flow, are becoming increasingly prominent, leading to high overall energy consumption in fluid systems. Conventional gas control valves, on the other hand, lack precise controller accuracy, making them incapable of precise adjustment and display, resulting in significant energy waste. Furthermore, conventional pneumatic valves lack explosion-proof features and cannot be used in locations requiring such protection. Utility Model Content

[0004] In order to solve at least one of the above technical problems, the present invention provides an explosion-proof pneumatic control valve, the technical solution of which is as follows:

[0005] An explosion-proof pneumatic regulating valve, comprising: a seat valve body, an explosion-proof pneumatic actuator, a first explosion-proof temperature transmitter, a second explosion-proof temperature transmitter, a first explosion-proof pressure transmitter, a second explosion-proof pressure transmitter and a controller;

[0006] A first flameproof pressure transmitter is provided at the inlet of the seat valve body, and a second flameproof pressure transmitter is provided at the outlet of the seat valve body; the first flameproof temperature transmitter and the second flameproof temperature transmitter are respectively provided at the temperature measurement points;

[0007] The first flameproof pressure transmitter, the second flameproof pressure transmitter, the first flameproof temperature transmitter and the second flameproof temperature transmitter are connected to the controller via cables;

[0008] The controller is communicatively connected to the explosion-proof pneumatic actuator, and the explosion-proof pneumatic actuator is connected to the seat valve body.

[0009] Preferably, the inlet flange of the seat valve body is provided with a first pressure-introducing hole, which is connected to a first explosion-proof pressure transmitter; the outlet flange of the seat valve body is provided with a second pressure-introducing hole, which is connected to a second explosion-proof pressure transmitter.

[0010] Preferably, an inlet connecting ball valve is installed on the first pressure-introducing hole, and an outlet connecting ball valve is installed on the second pressure-introducing hole.

[0011] Preferably, the seat valve body is connected to the explosion-proof pneumatic actuator via a connecting shaft and a bracket.

[0012] Preferably, the controller includes a data receiving end and a main control unit, the data receiving end is communicatively connected to the output ends of the first explosion-proof temperature transmitter, the second explosion-proof temperature transmitter, the first explosion-proof pressure transmitter and the second explosion-proof pressure transmitter, receives pressure and temperature data, and the data receiving end is connected to the main control unit to transmit the pressure and temperature data to the main control unit.

[0013] Preferably, the controller also includes a control signal output end, which is respectively communicatively connected to the first explosion-proof pressure transmitter, the second explosion-proof pressure transmitter, the first explosion-proof temperature transmitter and the second explosion-proof temperature transmitter, and the control signal output end is also communicatively connected to the explosion-proof pneumatic actuator.

[0014] Preferably, the input ends of the first flameproof temperature transmitter and the second flameproof temperature transmitter are connected to temperature sensors, and the input ends of the first flameproof pressure transmitter and the second flameproof pressure transmitter are connected to pressure sensors.

[0015] Preferably, the controller includes a display, and the display is connected to the main control unit.

[0016] Preferably, the display content includes: inlet pressure, outlet pressure, pressure difference, temperature, instantaneous flow value and accumulated flow value of the fluid flowing through the valve.

[0017] Preferably, the display includes a liquid crystal display screen, and the liquid crystal display screen also includes a plurality of buttons for setting the pressure control value and the flow control value.

[0018] The present invention has the following beneficial effects: An explosion-proof pneumatic control valve of the present invention has ideal valve adjustment characteristics. A first explosion-proof pressure transmitter, a second explosion-proof pressure transmitter, a first explosion-proof temperature transmitter, and a second explosion-proof temperature transmitter are connected to a controller via cables. The controller and an explosion-proof pneumatic actuator are communicatively connected, and the explosion-proof pneumatic actuator is connected to the seat valve body. Firstly, the valve utilizes multiple explosion-proof structures, exhibits explosion-proof electrical properties, and can be used in applications requiring explosion-proof operation. Secondly, precise valve opening control can be achieved through the feedback path of the sensor, controller, and actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic structural diagram of an explosion-proof pneumatic control valve disclosed in this embodiment;

[0022] Figure 2 This is a partial structural diagram of an explosion-proof pneumatic control valve disclosed in this embodiment.

[0023] Reference numerals:

[0024] 1. Explosion-proof junction box; 2. Controller; 3. LCD display; 4. Inlet connection ball valve; 5. Explosion-proof pneumatic actuator; 6. Connecting shaft; 7. Bracket; 8. First explosion-proof pressure transmitter; 9. Second explosion-proof pressure transmitter; 10. First explosion-proof temperature transmitter; 11. Second explosion-proof temperature transmitter; 12. Seat valve body; 13. Outlet connection ball valve. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model will be understood based on the specific circumstances of the solution.

[0028] Example 1

[0029] See also Figure 1 A preferred embodiment of the present utility model is an explosion-proof pneumatic regulating valve, comprising: a seat valve body 12, an explosion-proof pneumatic actuator 5, a first explosion-proof temperature transmitter 10, a second explosion-proof temperature transmitter 11, a first explosion-proof pressure transmitter 8, a second explosion-proof pressure transmitter 9 and a controller 2.

[0030] A first flameproof pressure transmitter 8 is provided at the inlet of the seat valve body 12, and a second flameproof pressure transmitter 9 is provided at the outlet of the seat valve body 12; a first flameproof temperature transmitter 10 and a second flameproof temperature transmitter 11 are respectively provided at the temperature measurement points;

[0031] The first flameproof pressure transmitter 8, the second flameproof pressure transmitter 9, the first flameproof temperature transmitter (10) and the second flameproof temperature transmitter 11 are connected to the controller 2 via cables;

[0032] The controller 2 is communicatively connected to the explosion-proof pneumatic actuator 5 , and the explosion-proof pneumatic actuator 5 is connected to the seat valve body 12 .

[0033] It also includes an explosion-proof junction box 1, in which the controller 2 is installed. The explosion-proof junction box 1 includes a wiring unit, one end of which is connected to the controller 2, and the other end is connected to an external module that needs wiring through a cable.

[0034] Specifically, the seat valve body 12 is connected to the first flameproof pressure transmitter 8 and the second flameproof pressure transmitter 9 via the following mechanism.

[0035] The inlet flange of the seat valve body 12 is provided with a first pressure-introduction hole, which is connected to the first flameproof pressure transmitter 8. The outlet flange of the seat valve body 12 is provided with a second pressure-introduction hole, which is connected to the second flameproof pressure transmitter 9. The first pressure-introduction hole is mounted on the inlet connection ball valve 4, and the second pressure-introduction hole is mounted on the outlet connection ball valve 13.

[0036] Specifically, a pressure-introducing hole is respectively provided on the inlet and outlet flanges of the seat valve body 12. An inlet connecting ball valve 4 and an outlet connecting ball valve 13 are respectively installed at the corresponding pressure-introducing hole positions on the inlet and outlet flanges. The inlet fluid pressure is introduced into the first flameproof pressure transmitter 8 installed on the valve body through the inlet connecting ball valve 4; the outlet fluid pressure is introduced into the second flameproof pressure transmitter 9 installed on the valve body through the outlet connecting ball valve 13.

[0037] The controller includes a data receiving end and a main control unit. The data receiving end is communicatively connected to the output ends of the first explosion-proof temperature transmitter, the second explosion-proof temperature transmitter, the first explosion-proof pressure transmitter and the second explosion-proof pressure transmitter to receive pressure and temperature data. The data receiving end is connected to the main control unit to transmit the pressure and temperature data to the main control unit.

[0038] The input ends of the first flameproof temperature transmitter and the second flameproof temperature transmitter are connected to the temperature sensor, and the input ends of the first flameproof pressure transmitter and the second flameproof pressure transmitter are connected to the pressure sensor.

[0039] The controller 2 also includes a control signal output end, which is respectively communicated with the first explosion-proof pressure transmitter, the second explosion-proof pressure transmitter, the first explosion-proof temperature transmitter and the second explosion-proof temperature transmitter. The control signal output end is also communicated with the explosion-proof pneumatic actuator 5.

[0040] The first flameproof temperature transmitter 10 and the second flameproof temperature transmitter 11 are respectively installed to measure target point temperatures, for example, in a circulating water system, they are generally used to measure the temperatures of water supply and return pipes.

[0041] The seat valve body 12 is connected to the explosion-proof pneumatic actuator 5 through a connecting shaft 6 and a bracket 7. The connecting shaft 6 is used for connection and fixation, and the bracket 7 is used for stable support.

[0042] At the same time, the explosion-proof pneumatic actuator 5 is connected to the controller 2 via cables and signal lines. The electrical connection here can be separate cables and signal lines, or a signal line integrated with a power line.

[0043] Function: Controller 2 accurately measures the temperature at the equipment installation location through the first flameproof temperature transmitter 10 and the second flameproof temperature transmitter 11, and calculates the current temperature difference. Controller 2 can change the expected opening of the seat valve body 12 according to the preset expected target. Controller 2 can also calculate the cooling or heating power based on the known flow rate to evaluate the operating status of the industrial equipment.

[0044] Furthermore, this embodiment utilizes various flameproof electrical devices, such as flameproof temperature transmitters and flameproof pressure transmitters. These flameproof electrical devices can protect various surrounding devices. The housing of each flameproof device not only isolates internal sparks and arcs from explosive gases in the surrounding environment, but also ensures that the connections between components within the housing have both specific dimensions and structural strength. This prevents the housing from being damaged when an explosive gas mixture entering the housing is ignited by sparks or arcs within the housing, and prevents explosives from passing through connection gaps and detonating the explosive gas mixture in the surrounding environment. This effectively reduces the likelihood of accidents and mitigates the hazards of various accidents.

[0045] After the controller 2 and the explosion-proof pneumatic actuator 5 are connected through a signal line to provide an opening signal, the explosion-proof pneumatic actuator 5 can complete the action promptly and accurately, so that the valve operates at the expected opening.

[0046] Controller 2 integrates a calculation program for the relationship between flow and inlet pressure, outlet pressure, and temperature for valves of different diameters at different openings. Controller 2 calculates the instantaneous flow based on the valve opening and inlet pressure, outlet pressure, and temperature, and calculates the cumulative flow based on the instantaneous flow and time integral.

[0047] The controller 2 stores an outlet pressure control program and a flow control program, and the controller 2 automatically adjusts the valve opening according to the outlet pressure or flow.

[0048] The controller 2 is connected to the LCD 3 to display the inlet pressure, outlet pressure, pressure difference, temperature, instantaneous flow rate and accumulated flow rate of the valve, and set the pressure control value and flow control value.

[0049] The controller 2 stores correction programs for other fluids, and corrects the flow calculation program through correction coefficients such as density and viscosity.

[0050] In a second aspect, a control method is disclosed, comprising the following steps:

[0051] S1: Provide buttons on the LCD screen to set the valve pressure target value or flow target value in advance;

[0052] S2: The controller receives the pressure and temperature collected by the sensor;

[0053] S3: Calculate the instantaneous flow rate based on the valve opening, inlet pressure, outlet pressure, and temperature, and calculate the cumulative flow rate based on the instantaneous flow rate and time integral to obtain the pressure measurement value or flow measurement value;

[0054] S4: Compare the pressure measurement value or flow measurement value with the pressure target value or flow target value of the set valve to directly achieve automatic control of dynamic balance pressure or flow.

[0055] Furthermore, the controller also stores correction programs for other fluids, and corrects the flow calculation program through correction coefficients such as density and viscosity.

[0056] Example 2

[0057] See Figure 1 and Figure 2 In this embodiment, the explosion-proof pneumatic actuator 5, the first explosion-proof pressure transmitter 8, the second explosion-proof pressure transmitter 9, the first explosion-proof temperature transmitter 10 and the second explosion-proof temperature transmitter 11 are introduced into the explosion-proof junction box 1 and connected to the controller 2 through cables, and the LCD display 3 is connected to the controller 2 through an internal cable.

[0058] In this embodiment, the controller 2 includes a control signal output end, which is respectively communicated with the first explosion-proof pressure transmitter 8, the second explosion-proof pressure transmitter 9, the first explosion-proof temperature transmitter 10 and the second explosion-proof temperature transmitter 11, and the control signal output end is also communicated with the explosion-proof pneumatic actuator 5.

[0059] The controller 2 also includes a data receiving end and a main control unit. The data receiving end is communicatively connected to the output ends of the first explosion-proof temperature transmitter, the second explosion-proof temperature transmitter, the first explosion-proof pressure transmitter and the second explosion-proof pressure transmitter to receive pressure and temperature data. The data receiving end is connected to the main control unit to transmit the pressure and temperature data to the main control unit.

[0060] The system also includes sensors positioned at corresponding locations, configured to receive pressure and temperature data and transmit the data to a main control unit via a first flameproof pressure transmitter, a second flameproof pressure transmitter, a first flameproof temperature transmitter, and a second flameproof temperature transmitter. The main control unit stores a calculation program for the relationship between flow rate and inlet pressure, outlet pressure, and temperature for valves of different calibers and at different openings. The main control unit calculates the instantaneous flow rate based on the valve opening and the inlet pressure, outlet pressure, and temperature, and calculates the cumulative flow rate based on the instantaneous flow rate and time integral. The main control unit also stores an outlet pressure control program and a flow control program, automatically adjusting the valve opening based on the outlet pressure or flow rate.

[0061] In this embodiment, the controller 2 further includes a display connected to the main control unit, and the display is used to display the inlet pressure, outlet pressure, pressure difference, temperature, measured temperature difference, instantaneous flow value and accumulated flow value of the fluid flowing through the valve.

[0062] In this embodiment, the display includes a liquid crystal display screen, and the liquid crystal display screen also includes a plurality of buttons for setting the pressure control value and the flow control value.

[0063] In this embodiment, the main control unit also includes correction programs for other fluids, which correct the flow calculation program through correction coefficients such as density and viscosity.

[0064] The control method is:

[0065] By setting a target pressure or flow rate in the controller, sampling and calculating data from external signals, and comparing them with the set values, the seat valve opening is adjusted based on the measured parameters to achieve intelligent control of pressure or flow. This control valve can directly integrate automatic measurement and control of dynamic flow and pressure.

[0066] Exemplarily, the specific steps are as follows:

[0067] S1: Provide buttons on the LCD screen to set the valve pressure target value or flow target value in advance;

[0068] S2: The main control unit receives the pressure and temperature collected by the sensor;

[0069] S3: Calculate the instantaneous flow rate Q = Kvs·ΔP based on the valve inlet pressure, outlet pressure, and temperature, where Kvs is the valve flow coefficient, which is determined by the valve diameter; ΔP is the difference between the pressure measurements of the first and second flameproof pressure transmitters ΔP = P1-P2, where P1 is the pressure measurement value of the first flameproof pressure transmitter and P2 is the pressure measurement value of the second flameproof pressure transmitter; calculate the cumulative flow rate based on the instantaneous flow rate and time integral t0 is the starting time point, t is the ending time point, q(τ) is the instantaneous flow at any time τ, and Q(t) represents the total flow accumulated from t0 to time t.

[0070] S4: Compare the pressure measurement value or flow measurement value with the pressure target value or flow target value of the set valve, for example, the current target flow value is 20m 3 / h, the measured flow rate is 10m 3 / h, the target value is greater than the measured value, the valve will continue to open until the measured flow rate is 20m 3 / h, and vice versa; the control principles of other parameters are the same. By operating and controlling the valve opening, dynamic balance pressure or flow automatic control can be achieved.

[0071] The working principle of this technical solution is: through the pre-set pressure target value or flow target value, the main control unit calculates the pressure measurement value or flow measurement value according to the pressure and temperature data transmitted by the sensor, compares the pressure measurement value or flow measurement value with the set pressure target value or flow target value, and adjusts the valve opening in real time to directly realize the automatic control of dynamic balance pressure or flow.

[0072] The explosion-proof pneumatic control valve is a valve device that integrates intelligent sensors, controllers, control valves and actuators. It has the functions of intelligent measurement, intelligent control and network communication integration of pipeline fluid parameters such as pressure, pressure difference, temperature, temperature difference and flow. It is an intelligent fluid measurement and control valve that judges and responds to external parameters. It has multiple control modes and can flexibly switch control modes according to various expected control targets.

[0073] All parameters of the valve in this embodiment are known and controllable; the collection, transmission, storage, processing and feedback closed loop of valve data are realized without the need for external equipment; the explosion-proof pneumatic control valve disclosed in this embodiment can not only operate in various places with explosive gases and vapors, but also ensure safe production and prevent explosions and fires in accordance with relevant specifications, standards and regulations.

[0074] It should be noted that the cable disclosed in this article is a transmission line with communication and / or power supply capabilities.

Claims

1. An explosion-proof pneumatic control valve, characterized in that: include: Seat valve body, explosion-proof pneumatic actuator, first explosion-proof temperature transmitter, second explosion-proof temperature transmitter, first explosion-proof pressure transmitter, second explosion-proof pressure transmitter and controller; A first flameproof pressure transmitter is provided at the inlet of the seat valve body, and a second flameproof pressure transmitter is provided at the outlet of the seat valve body; the first flameproof temperature transmitter and the second flameproof temperature transmitter are respectively provided at the temperature measurement points; The first flameproof pressure transmitter, the second flameproof pressure transmitter, the first flameproof temperature transmitter and the second flameproof temperature transmitter are connected to the controller via cables; the controller is communicatively connected to the explosion-proof pneumatic actuator, and the explosion-proof pneumatic actuator is connected to the seat valve body.

2. The explosion-proof pneumatic control valve according to claim 1, characterized in that: The inlet flange of the seat valve body is provided with a first pressure-introducing hole, which is connected to a first explosion-proof pressure transmitter; the outlet flange of the seat valve body is provided with a second pressure-introducing hole, which is connected to a second explosion-proof pressure transmitter.

3. The explosion-proof pneumatic control valve according to claim 2, characterized in that: An inlet connecting ball valve is installed on the first pressure-introducing hole, and an outlet connecting ball valve is installed on the second pressure-introducing hole.

4. The explosion-proof pneumatic control valve according to claim 1, characterized in that: The seat valve body is connected to the explosion-proof pneumatic actuator through a connecting shaft and a bracket.

5. The explosion-proof pneumatic regulating valve according to claim 1, characterized in that: The controller includes a data receiving end and a main control unit. The data receiving end is communicatively connected to the output ends of the first explosion-proof temperature transmitter, the second explosion-proof temperature transmitter, the first explosion-proof pressure transmitter and the second explosion-proof pressure transmitter to receive pressure and temperature data. The data receiving end is connected to the main control unit to transmit the pressure and temperature data to the main control unit.

6. The explosion-proof pneumatic control valve according to claim 5, characterized in that: The controller also includes a control signal output end, which is respectively communicatively connected to the first explosion-proof pressure transmitter, the second explosion-proof pressure transmitter, the first explosion-proof temperature transmitter and the second explosion-proof temperature transmitter. The control signal output end is also communicatively connected to the explosion-proof pneumatic actuator.

7. An explosion-proof pneumatic control valve according to any one of claims 1 to 6, characterized in that: The input ends of the first flameproof temperature transmitter and the second flameproof temperature transmitter are connected to the temperature sensor, and the input ends of the first flameproof pressure transmitter and the second flameproof pressure transmitter are connected to the pressure sensor.

8. The explosion-proof pneumatic control valve according to claim 1, characterized in that: The controller includes a display connected to the main control unit.

9. The explosion-proof pneumatic regulating valve according to claim 8, characterized in that: The display content includes: the inlet pressure, outlet pressure, pressure difference, temperature, instantaneous flow value and accumulated flow value of the fluid flowing through the valve.

10. The explosion-proof pneumatic regulating valve according to claim 8, characterized in that: The display includes a liquid crystal display screen, and the liquid crystal display screen also includes a plurality of buttons for setting a pressure control value and a flow control value.

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