Valve with intelligent electric heat tracing control and heat preservation functions and control method thereof

Abstract

The invention discloses a valve with intelligent electric heat tracing control and heat preservation functions and a control method of the valve, and relates to the technical field of easily-crystallized medium control valves, and according to the method, an intelligent temperature control system, a control valve, a heat tracing belt, a heat preservation sleeve, a temperature sensor and a shell are included; the control valve comprises a valve and a pneumatic actuator; the intelligent temperature control system is fixed on the valve; the heat tracing band is wound and fixed on the valve body according to a set interval; the heat preservation sleeve wraps the valve body wound with the heat tracing band. The temperature sensor is used for detecting the temperature of the valve and transmitting the detected temperature to the intelligent temperature control system; the pneumatic actuator is used for driving the valve to open, close and adjust; the shell is used for sealing the intelligent temperature control system, the control valve, the pneumatic actuator, the heat tracing band, the heat preservation sleeve and the temperature sensor. The problem that the valve is prone to being blocked in the working condition of media prone to crystallization can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of control valves for easily crystallized media, and in particular to a valve with intelligent electric heating control and insulation functions and a control method thereof. Background Art

[0002] The control valve is a throttling or regulating element used in solar thermal power generation projects. Its working medium is solar molten salt, which is a storage medium of 60% NaNO3 mixed with 40% KNO3. Since this medium is prone to crystallization, the control valve is blocked and cannot work normally. Summary of the invention

[0003] The purpose of this application is to provide a valve with intelligent electric heating control and insulation functions and a control method thereof, which can solve the problem that the crystallizable medium in the control valve is easily blocked after cooling and crystallization.

[0004] To achieve the above objectives, this application provides the following solutions:

[0005] In a first aspect, the present application provides a valve with intelligent electric heating control and insulation functions, comprising:

[0006] Intelligent temperature control systems, control valves, pneumatic actuators, heating cables, insulation sleeves, temperature sensors and housings;

[0007] The control valve includes a valve and a pneumatic actuator; the intelligent temperature control system is fixed on the valve; the heating tape is wound at a set interval and fixed on the valve body; the insulation sleeve is wrapped around the outside of the valve body wrapped with the heating tape; the temperature sensor is used to detect the temperature of the valve and transmit the detected temperature to the intelligent temperature control system; the pneumatic actuator is used to drive the valve to switch and adjust; the housing is used to seal the intelligent temperature control system, control valve, pneumatic actuator, heating tape, insulation sleeve and temperature sensor.

[0008] Optionally, the heating tape is a high-temperature mineral insulated heating cable; the high-temperature mineral insulated heating cable is a thermally conductive insulator made of a single or double alloy heating wire.

[0009] Optionally, the shell is a protective cover made of fiberglass reinforced plastics.

[0010] Optionally, the insulation sleeve is a high temperature resistant insulation sleeve, and the insulation sleeve is made of double-layer material; the outer layer material of the insulation sleeve is silicone cloth, and the inner layer material of the insulation sleeve is high-silica cloth.

[0011] Optionally, the intelligent temperature control system includes a temperature acquisition module and a temperature control module;

[0012] The temperature acquisition module is used to obtain temperature data collected by the temperature sensor;

[0013] The temperature control module is used to adjust the working current of the heating belt according to the collected temperature data and based on the temperature threshold of the control valve.

[0014] Optionally, the intelligent temperature control system includes a PLC field control system and a networked 4G communication module; the PLC field control system is used to collect and process the switch input of the valve, execute relay control output, and collect and convert analog signals.

[0015] Optionally, the intelligent temperature control system further includes a touch screen human-machine interface for controlling operations and displaying analog signals.

[0016] Optionally, a copper wire mesh is provided between the heating belt and the valve body.

[0017] In a second aspect, the present application provides a control method for a valve with intelligent electric heating control and insulation function, comprising:

[0018] Obtain the target temperature range for the valve and valve body in the control valve;

[0019] Based on the temperature sensor, the temperature of the valve body and valve is detected, and the detected temperature data is transmitted to the intelligent temperature control system;

[0020] Based on the intelligent temperature control system, the received temperature data is compared with the set target temperature range to determine whether the heating mode needs to be changed;

[0021] When the temperature is lower than the target temperature range, the temperature sensor sends a signal to the intelligent temperature control system, turning on the heating power supply to increase the valve temperature;

[0022] When the temperature is higher than the target temperature range, the temperature sensor sends a signal to the intelligent temperature control system to turn off the heating power and reduce the valve temperature.

[0023] Optionally, when the intelligent temperature control system detects that the temperature data transmitted by the temperature sensor is abnormal, the abnormal information is remotely sent to maintenance personnel based on the networked 4G communication module.

[0024] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0025] The present application provides a valve with intelligent electric heating control and insulation function and a control method thereof, wherein the intelligent control valve integrates an intelligent temperature control system, which can monitor the temperature of the valve body and the valve in real time. When the temperature drops and approaches the crystallization point, the intelligent temperature control system can respond quickly and start the heating belt. The heating belt is wound around the valve body according to the set spacing, and the heating belt is heated to prevent cooling and crystallization in the valve body. The insulation sleeve is wrapped around the outside of the valve body wrapped with the heating belt to further reduce heat loss and ensure the heating effect of the heating belt. In this way, even if the external ambient temperature is low, the valve body can maintain a sufficient temperature to avoid crystallization. In addition, the pneumatic actuator uses air pressure to adjust the valve to ensure the rapid and accurate opening and closing of the valve. This helps to respond in time and prevent blockage when the flow is not smooth or the valve needs to be closed urgently. The present application realizes precise control of temperature and rapid adjustment of the valve, thereby effectively solving the problem that the easy-to-crystallize medium in the control valve is easily blocked after cooling and crystallization, and ensures the stable operation of the solar thermal power generation project. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of a valve structure with intelligent electric heating control and heat preservation functions provided in one embodiment of the present application;

[0028] Figure 2 A detailed structural diagram of a valve with intelligent electric heating control and heat preservation functions provided in one embodiment of the present application;

[0029] Figure 3 A physical diagram of an intelligent control valve provided in one embodiment of the present application;

[0030] Figure 4 A physical picture of the intelligent control valve body provided in one embodiment of the present application

[0031] Figure 5 A schematic diagram of the installation of an intelligent control valve intelligent temperature control system provided in one embodiment of the present application;

[0032] Figure 6 A schematic diagram of a PLC field control system provided in an embodiment of the present application;

[0033] Figure 7 A schematic diagram of a temperature sensor provided in an embodiment of the present application;

[0034] Figure 8 A schematic diagram of a thermal insulation sleeve provided in an embodiment of the present application;

[0035] Fig. 9 A schematic diagram of a PLC monitoring interface provided in an embodiment of the present application;

[0036] Fig.10 A schematic diagram of a remote monitoring system interface provided by an embodiment of the present application;

[0037] Fig.11 A logic control diagram provided for an embodiment of the present application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] Embodiment 1

[0041] like Figure 1 As shown, this embodiment provides a valve with intelligent electric heating control and insulation functions, including:

[0042] Intelligent temperature control systems, control valves, heating cables, insulation sleeves, temperature sensors and housings;

[0043] The control valve includes a valve and a pneumatic actuator; the intelligent temperature control system is fixed on the valve; the heating tape is wound at a set interval and fixed on the valve body; the insulation sleeve is wrapped around the outside of the valve body wrapped with the heating tape; the temperature sensor is used to detect the temperature of the valve and transmit the detected temperature to the intelligent temperature control system; the pneumatic actuator is used to drive the valve to switch and adjust; the housing is used to seal the intelligent temperature control system, control valve, pneumatic actuator, heating tape, insulation sleeve and temperature sensor.

[0044] In this embodiment, the physical diagram of the intelligent control valve is as follows: Figure 3 shown.

[0045] Among them, Figure 2As shown, the heating cable is a high-temperature mineral insulated heating cable; the high-temperature mineral insulated heating cable is a thermally conductive insulator made of a single or double alloy heating wire. Specifically, the heating cable is a high-temperature mineral insulated heating cable, also known as an armored MI heating cable, which uses a single or double alloy heating wire as a heating source, high-purity, high-temperature, fused crystalline magnesium oxide as a thermally conductive insulator, and a seamless continuous stainless steel or copper tube as a sheath, and is manufactured using a special production process. Specifically, the heating cable can be an armored insulated electric heating cable HIF MI.

[0046] Specifically, metal sheathed mineral insulated heating cables can meet the needs of high temperature conditions and large heating power. The maximum temperature of stainless steel sheathed heating cables can reach 650°C, and the conductor resistance value ranges from 28000-19.2Ω / km. Mineral insulated cables have excellent mechanical strength and corrosion resistance.

[0047] The outer shell is a protective cover made of fiberglass reinforced plastic, specifically glass fiber reinforced plastic, and the outer shell consists of an outer shell upper part and an outer shell lower part.

[0048] Among them, Figure 2 and Figure 8 As shown, the insulation cover is a high temperature resistant insulation cover, and the insulation cover is composed of double layers of materials; the outer layer material of the insulation cover is silicone cloth, and the inner layer material of the insulation cover is high silica cloth.

[0049] Among them, Figure 5-Figure 7 As shown, the insulation cover has a built-in intelligent temperature control system, which can collect and control temperature, and has 485 communication function and Internet of Things communication function, which can be remotely monitored on mobile phones and computers. The intelligent temperature control system adopts a quick plug-in design, which is convenient for installation and maintenance, and is waterproof, dustproof and corrosion-resistant. The intelligent temperature control system integrates human-computer interaction, logic control, IO interface, data processing, 4G communication, APP (applet) remote monitoring, and cloud service. It is a powerful dedicated electric heating control system with independent design to facilitate future system upgrades.

[0050] Among them, the intelligent temperature control system includes a temperature acquisition module and a temperature control module; the temperature acquisition module is used to obtain temperature data collected by the temperature sensor; the temperature control module is used to adjust the working current of the heating belt based on the collected temperature data and the temperature threshold of the control valve.

[0051] The intelligent temperature control system includes a PLC field control system and a networked 4G communication module; the PLC field control system is used to collect and process the switch input of the valve, execute the relay control output, and collect and convert the analog signal. Fig. 9 shown.

[0052] Wherein, the intelligent temperature control system also includes a touch screen human-machine interface for controlling operations and displaying analog signals.

[0053] The intelligent control system includes PLC control box and electric control box, such as Figure 2 As shown, the front cover and the rear cover of the electric control box are connected by bolts. The electric control box includes a wire duct, an IoT module IoT USR DR502, a power supply HDR-30-24, a PLC SIMENSES7-200 SMART CPU SR20 SB AR02, a circuit breaker NXBLE-63YH C2525A, an AC contactor NCH8G-20AC220V and wiring terminals.

[0054] like Figure 4 As shown, a copper wire mesh is provided between the heating belt and the valve body. The copper wire mesh can improve the heat transfer efficiency between the heating belt and the valve body, ensure that the valve body is heated evenly, and further improve the temperature control accuracy and stability of the intelligent control valve.

[0055] Among them, the logic control in the intelligent temperature control system is as follows: Fig.11 As shown, the control system is composed of DCS and PLC, PCL controls temperature measurement sensor 2, temperature measurement sensor 3, Internet of Things module, solid-state relay 1 and solid-state relay 2, and temperature measurement sensor 1 provides feedback of valve body temperature to PCL. Among them, temperature measurement sensor 2 measures the temperature of valve cover, temperature measurement sensor 3 measures the temperature of valve packing, Internet of Things module and mobile terminal transmit information to each other, solid-state relay 1 controls the current of valve body heating belt, and solid-state relay 2 controls the current of valve cover heating belt.

[0056] Embodiment 2

[0057] This embodiment provides a control method based on the valve with intelligent electric heating control and insulation function, including:

[0058] Obtain the target temperature range for the valve and valve body in the control valve;

[0059] Based on the temperature sensor, the temperature of the valve body and valve is detected, and the detected temperature data is transmitted to the intelligent temperature control system;

[0060] Based on the intelligent temperature control system, the received temperature data is compared with the set target temperature range to determine whether the heating mode needs to be changed;

[0061] When the temperature is lower than the target temperature range, the temperature sensor sends a signal to the intelligent temperature control system, turning on the heating power supply to increase the valve temperature;

[0062] When the temperature is higher than the target temperature range, the temperature sensor sends a signal to the intelligent temperature control system to turn off the heating power and reduce the valve temperature.

[0063] Among them, Fig.10 As shown in the figure, when the intelligent temperature control system detects that the temperature data transmitted by the temperature sensor is abnormal, the abnormal information is remotely sent to the maintenance personnel based on the networked 4G communication module. The maintenance personnel can adjust the temperature through the remote control interface.

[0064] In summary, this application has the following technical effects:

[0065] This application is based on IoT Internet of Things intelligent technology, and monitors the working status of the electric heating cable of the unit instrument pipe in real time, monitors the working current of each electric heating cable and the real-time temperature of the instrument pipe in real time, and can view the working status of each electric heating cable in real time on site and on mobile phones, realizing unmanned operation and full wireless monitoring, timely discovering and eliminating hidden faults, ensuring that the instrument pipe of the unit does not freeze in winter, especially in extremely cold weather, thereby ensuring the safe and stable operation of the unit in winter. At the same time, it greatly reduces the work intensity and work pressure of maintenance personnel and improves work efficiency.

[0066] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A valve with intelligent electric heating control and insulation function, characterized in that: include: Intelligent temperature control systems, control valves, heating cables, insulation sleeves, temperature sensors and housings; The control valve includes a valve and a pneumatic actuator; the intelligent temperature control system is fixed on the valve; the heating tape is wound at a set interval and fixed on the valve body; the insulation sleeve is wrapped around the outside of the valve body wrapped with the heating tape; the temperature sensor is used to detect the temperature of the valve and transmit the detected temperature to the intelligent temperature control system; the pneumatic actuator is used to drive the valve to switch and adjust; the casing is used to protect the intelligent temperature control system, control valve, pneumatic actuator, heating tape, insulation sleeve and temperature sensor.

2. A valve with intelligent electric heating control and heat preservation function according to claim 1, characterized in that: The heating belt is a high-temperature mineral insulated heating cable; the high-temperature mineral insulated heating cable is a heat-conducting insulator made of a single or double alloy heating wire.

3. A valve with intelligent electric heating control and heat preservation function according to claim 2, characterized in that: The shell is a protective cover made of glass fiber reinforced plastic.

4. A valve with intelligent electric heating control and heat preservation function according to claim 3, characterized in that: The insulation cover is a high temperature resistant insulation cover, and the insulation cover is composed of double-layer materials; the outer layer material of the insulation cover is silicone cloth, and the inner layer material of the insulation cover is high-silica cloth.

5. A valve with intelligent electric heating control and heat preservation function according to claim 4, characterized in that: The intelligent temperature control system includes a temperature acquisition module and a temperature control module; The temperature acquisition module is used to obtain temperature data collected by the temperature sensor; The temperature control module is used to adjust the working current of the heating belt according to the collected temperature data and based on the temperature threshold of the control valve.

6. A valve with intelligent electric heating control and heat preservation function according to claim 5, characterized in that: The intelligent temperature control system includes a PLC field control system and a networked 4G communication module; the PLC field control system is used to collect and process the switch input of the valve, execute relay control output, and collect and convert analog signals.

7. A valve with intelligent electric heating control and heat preservation function according to claim 6, characterized in that: The intelligent temperature control system also includes a touch screen human-machine interface for controlling operations and displaying analog signals.

8. The valve with intelligent electric heating control and heat preservation function according to claim 7, characterized in that: A copper wire mesh is provided between the heating belt and the valve body.

9. A control method for a valve with intelligent electric heating control and insulation function based on any one of claims 1 to 8, characterized in that: include: Obtain the target temperature range for the valve and valve body in the control valve; Based on the temperature sensor, the temperature of the valve body and valve is detected, and the detected temperature data is transmitted to the intelligent temperature control system; Based on the intelligent temperature control system, the received temperature data is compared with the set target temperature range to determine whether the heating mode needs to be changed; When the temperature is lower than the target temperature range, the temperature sensor sends a signal to the intelligent temperature control system, turning on the heating power supply to increase the valve temperature; When the temperature is higher than the target temperature range, the temperature sensor sends a signal to the intelligent temperature control system to turn off the heating power and reduce the valve temperature.

10. The control method according to claim 9, characterized in that: When the intelligent temperature control system detects that the temperature data transmitted by the temperature sensor is abnormal, the abnormal information will be remotely sent to the maintenance personnel based on the networked 4G communication module.

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