Electromagnetic valve heating system

Abstract

The utility model relates to the technical field of electromagnetic valve equipment, in particular to an electromagnetic valve heating system, which comprises a heating plate and a power supply system, a fixing structure for fixing the heating plate on the surface of an electromagnetic valve is arranged on the heating plate, the heating plate is electrically heated, and the power supply system is electrically connected with the heating plate. The surface of the electromagnetic valve in a low-temperature state can be heated through the heating plate, and the situation that the electromagnetic valve cannot work normally due to the fact that a valve element of the electromagnetic valve is frozen is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valve equipment, and more specifically, to a electromagnetic valve heating system. Background Art

[0002] Pneumatic solenoid valves are widely used in automation control in industrial production. They have the advantages of energy saving and environmental protection, and are widely used. However, in northern my country, the temperature is low in winter, and the working environment of the starter solenoid valve under this working condition is harsh. Pneumatic solenoid valves work in a sub-zero temperature environment. If there is a small amount of moisture in the compressed air, it will freeze, causing the pneumatic solenoid valve to fail to work, affecting the normal operation of the equipment and posing certain safety hazards.

[0003] In the face of this problem, it is necessary to deliver heat to the pneumatic solenoid valve in a low temperature environment to keep it at the indicated temperature. Heat exchange is mainly carried out in three ways, namely heat transfer, heat convection, and heat radiation. Heat transfer and heat radiation are generally used to achieve the purpose of heating. At present, the technical solution adopted by most manufacturers is to increase the ambient temperature of the pneumatic solenoid valve or use a 220V small sun to directly heat the pneumatic solenoid valve, so that the surface of the pneumatic solenoid valve remains in a relatively warm state, so that the moisture in the pneumatic solenoid valve always remains in liquid or gaseous state and will not solidify, so that the pneumatic solenoid valve can work. The method of directly increasing the ambient temperature of the pneumatic solenoid valve is to increase the temperature of the pneumatic solenoid valve by increasing the air temperature and then allowing the air to transfer heat with the pneumatic solenoid valve. This base solution consumes too much energy, and most of the heated air does not participate in the heat transfer on the surface of the pneumatic solenoid valve, resulting in a large amount of energy waste, which is contrary to the development direction of low-carbon and environmental protection. Moreover, this technical solution can only be used when the pneumatic solenoid valve is in a relatively closed space, and it is difficult to adapt to a variety of usage scenarios of pneumatic solenoid valves. The technical solution of using a 220V small sun to heat the pneumatic solenoid valve directly has the following problems: on the one hand, the 220V small sun cannot directly contact the pneumatic solenoid valve, and needs to project heat through the air to the surface of the pneumatic solenoid valve by thermal radiation. This method dissipates a lot of energy during energy transmission, and there is a lot of unnecessary energy loss. On the other hand, the 220V voltage is relatively high, which poses a safety hazard. At the same time, a single 220V small sun is difficult to heat pneumatic solenoid valves in multiple directions at the same time. When facing a large number of pneumatic solenoid valves, a large number of 220V small suns are required, which increases the cost of use. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a solenoid valve heating system, which transfers heat to the surface of the solenoid valve by means of heat transfer, thereby ensuring that the temperature of the solenoid valve is within a suitable working range. The heating plate is powered by a power supply system to ensure that the heating plate can continuously maintain the temperature of the surface of the solenoid valve.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a solenoid valve heating system, characterized in that it includes a heating plate and a power supply system, the heating plate is provided with a fixing structure for fixing the heating plate to the surface of the solenoid valve, the heating plate is electrically heated, and the power supply system is electrically connected to the heating plate.

[0006] In the technical scheme, the heating plate is fixed to the surface of the solenoid valve by a fixed structure, and the heat on the heating plate is transferred to the solenoid valve through the contact surface with the solenoid valve until the temperature of the solenoid valve is the same as that of the heating plate, and thermal equilibrium is achieved. Therefore, it is only necessary to ensure that the temperature of the heating plate is in an appropriate range, and the heating plate can ensure that the temperature of the solenoid valve is in an appropriate range by means of heat transfer and thermal balance, so as to avoid the situation where the water vapor inside the valve body condenses due to the low ambient temperature, making the solenoid valve unable to work normally. The heating plate needs to maintain a high temperature in a low temperature environment, and needs to continuously replenish energy to balance the heat dissipation of the heating plate. The heating plate can convert electrical energy into thermal energy, and the power supply system is electrically connected to the heating plate to continuously provide electrical energy to the heating plate. The heating plate then converts electrical energy into thermal energy, which is transferred to the solenoid valve and dissipated into the environment. The transfer efficiency of heat transfer is related to the contact area. The larger the contact area, the higher the transfer efficiency of heat transfer. The heating plate is a plate-like structure, and its surface with the largest area is in close contact with the surface of the solenoid valve, so that the heating plate and the solenoid valve have the largest contact surface, so that the heat transfer efficiency between the heating plate and the solenoid valve is maximized.

[0007] Preferably, the working current of the heating plate is 24V direct current, and the power supply system is provided with a conversion device which can convert 220V alternating current into 24V direct current.

[0008] Preferably, a first circuit breaker is provided on the circuit connecting the heating plate and the power supply system.

[0009] Preferably, the fixing structure is a threaded hole, a plurality of the threaded holes are provided, and the threaded holes are screw-connected to the mounting holes on the solenoid valve.

[0010] Preferably, it also includes a control system for controlling the operation of the heating plate, and the control system is connected in series in a circuit connecting the heating plate and the power supply system.

[0011] Preferably, the control system comprises a solid-state relay and a temperature controller, the solid-state relay is connected in series in a circuit connecting the heating plate and the power supply system, and the temperature controller is electrically connected to the solid-state relay.

[0012] Preferably, the temperature controller is further provided with a temperature sensor, and the temperature sensor is electrically connected to the temperature controller.

[0013] Preferably, the control system is electrically connected to the plurality of heating plates to control the operation of the plurality of heating plates.

[0014] Preferably, the operating current of the temperature controller is 220V alternating current.

[0015] Preferably, a second circuit breaker is provided on the circuit connecting the temperature controller to the 220V AC power supply.

[0016] Compared with the prior art, the beneficial effects of the present technical solution are as follows: by means of electric heating, a heating plate is provided to heat the solenoid valve, which has a relatively stable heating effect and a high heat transfer efficiency, reduces energy loss, and improves the heating effect. The power supply system provides 24V direct current to the heating plate, which is more energy-saving and safer than the commonly used 220V alternating current. A first circuit breaker is provided between the heating plate and the power supply system to ensure the safety of the heating plate and avoid overload. A control system is provided to realize the automation of the control of the working state of the heating plate, and whether the heating plate is working can be controlled according to the real-time temperature, so as to ensure that the solenoid valve can be heated in time to avoid affecting the operation of the solenoid valve due to heating lag. Both the temperature controller and the power supply system can be powered by a common 220V alternating current power supply, which is practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the electromagnetic valve heating system of the utility model;

[0018] Figure 2 It is a schematic diagram of a heating plate of a solenoid valve heating system of the utility model;

[0019] Figure 3 It is a schematic diagram of the solenoid valve of the solenoid valve heating system of the utility model.

[0020] In the attached drawings: 1. Heating plate; 2. Power supply system; 3. Control system; 4. Solenoid valve; 11. Fixed structure; 12. First circuit breaker; 31. Solid-state relay; 32. Temperature controller; 33. Temperature sensor; 34. Second circuit breaker; 41. Mounting hole. DETAILED DESCRIPTION

[0021] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0022] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0024] Example 1

[0025] like Figure 1 , 2 As shown, a solenoid valve heating system includes a heating plate 1 and a power supply system 2. A fixing structure 11 for fixing the heating plate 1 to the surface of the solenoid valve 4 is provided on the heating plate 1. The heating plate 1 is electrically heated, and the power supply system 2 is electrically connected to the heating plate 1. The heating plate 1 is fixed to the surface of the solenoid valve 4 through the fixing structure 11. The heat on the heating plate 1 is transferred to the solenoid valve 4 through the contact surface with the solenoid valve 4 until the temperature of the solenoid valve 4 is the same as that of the heating plate 1, and thermal equilibrium is achieved. Therefore, it is only necessary to ensure that the temperature of the heating plate 1 is in a suitable range. The heating plate 1 can ensure that the temperature of the solenoid valve 4 is in a suitable range by means of heat transfer and thermal balance, so as to avoid the situation that the solenoid valve 4 cannot work normally due to the condensation of water vapor inside the valve body due to the low ambient temperature. The heating plate 1 needs to maintain a high temperature in a low temperature environment, and needs to continuously replenish energy to balance the heat dissipation of the heating plate 1. The heating plate 1 can convert electrical energy into thermal energy. The power supply system 2 is electrically connected to the heating plate 1 to continuously provide electrical energy to the heating plate 1. The heating plate 1 then converts the electrical energy into thermal energy, transfers it to the solenoid valve 4 and dissipates it into the environment. The transfer efficiency of heat transfer is related to the contact area. The larger the contact area, the higher the transfer efficiency of heat transfer. The heating plate 1 is a plate-like structure, and its largest surface is in close contact with the surface of the solenoid valve 4, so that the heating plate 1 and the solenoid valve 4 have the largest contact surface, so that the heat transfer efficiency between the heating plate 1 and the solenoid valve 4 reaches the maximum.

[0026] like Figure 1As shown, the working current of the heating plate 1 is 24V direct current, and a conversion device is provided on the power supply system 2 to convert 220V alternating current into 24V direct current. The common power interface in reality provides 220V alternating current. 220V is a high-risk voltage, and the heating plate 1 is exposed on the surface of the solenoid valve 4, which is easily touched by the human body, and there are certain safety hazards. Under normal environmental conditions, voltages below 36V are considered safe voltages. The working current of the heating plate 1 is set to 24V alternating current, and its voltage is within the safe voltage range, avoiding potential safety hazards that may be caused by human contact. Since the common power interface in reality provides 220V alternating current, it does not match the power interface required by the heating plate 1, and cannot be directly connected to the power interface. Therefore, a power supply system 2 is also required, and a conversion device is provided on the power supply system 2 to convert 220V AC power into 24V DC power. The input end of the power supply device 2 is connected to the 220V AC power source, and the output end of the power supply device 2 is connected to the heating plate, so that the 220V AC power is converted into 24V DC power to power the heating plate 1.

[0027] like Figure 1 As shown, a first circuit breaker 12 is provided on the circuit connecting the heating plate 1 and the power supply system 2. During the operation of the heating plate 1, a fault may occur, causing the current to be too large, causing the heating plate 1 to be overloaded, thereby causing a safety hazard. In order to avoid the overload of the heating plate 1, it is necessary to disconnect the circuit in time when a fault occurs, cut off the input of electric energy and stop the heating plate 1 from working. A first circuit breaker 12 is connected in series between the heating plate 1 and the power supply system 2. When the current in the circuit is too large, the first circuit breaker 12 will automatically disconnect, so that the circuit is in an open circuit state, and the heating plate 1 stops working, thereby avoiding the heating plate 1 from continuing to work and causing circuit damage and other safety accidents.

[0028] like Figure 2 As shown, the fixing knot 11 is a threaded hole, and a plurality of threaded holes are provided, and the threaded holes are screwed to the mounting holes on the solenoid valve 4. The application scenario of the heating plate 1 is mainly the working condition with low ambient temperature. Under the working condition with high temperature, the surface of the solenoid valve 4 is covered with a layer of heating plate 1, which will affect the heat dissipation of the solenoid valve 4, and it is easy to store and maintain the heating plate 1 by removing the heating plate 1 from the solenoid valve 4 in a high temperature environment. At the same time, there is also the possibility that the heating plate 1 fails and needs to be replaced. Therefore, the heating plate 1 should be detachably connected to the solenoid valve 4. The heating plate 1 is fixed to the solenoid valve 4 by the fixing knot 11, and the fixing structure 1 is a threaded hole, which is screwed to the mounting hole 41 on the solenoid valve 4. Screw connection is a more common fixed connection method, which has a simple and reliable structure, low cost, easy installation and disassembly, and is convenient for the quick disassembly and replacement of the heating plate 1.

[0029] Example 2

[0030] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 1 As shown, it also includes a control system 3 for controlling the operation of the heating plate 1, and the control system 3 is connected in series in the circuit connecting the heating plate 1 and the power supply system 2. Since the internal structure of the valve body of the solenoid valve 4 is closed, it is difficult to directly observe with the naked eye whether the valve core of the solenoid valve 4 is frozen and cannot work normally. At the same time, the heating plate 1 cannot work all the time. On the one hand, it will increase the power loss of the heating plate 1, and on the other hand, it will also shorten the service life of the heating plate 1. Therefore, it is necessary to set up a control system 3 to control the working state of the heating plate 1, so as to avoid the situation where the valve core is frozen due to untimely manual discovery, realize the automation of the heating system, and reduce the labor load of workers.

[0031] like Figure 1 As shown, the control system 3 includes a solid-state relay 31 and a temperature controller 32. The solid-state relay 31 is connected in series in the circuit connecting the heating plate 1 and the power supply system 2, and the temperature controller 32 is electrically connected to the solid-state relay 31. A working circuit and a control circuit are arranged in the solid-state relay 31. The working circuit is connected to the circuit connecting the heating plate 1 and the power supply system 2, and the temperature controller 32 is connected to the control circuit. The temperature controller 32 can sense the temperature of the solenoid valve 4, and judge whether the heating plate 1 needs to work and send a signal to the solid-state relay 31. The solid-state relay 31 controls whether the working circuit is disconnected according to the received signal, and then controls whether the heating plate 1 works.

[0032] like Figure 1 As shown, the temperature controller 32 is also provided with a temperature sensor 33, and the temperature sensor 33 is electrically connected to the temperature controller 32. The temperature sensor 33 is used to detect the temperature of the working environment of the solenoid valve 4. When the temperature sensor 33 is placed in the working environment of the solenoid valve 4, the ambient temperature can be detected by the temperature sensor 33 by direct contact. The ambient temperature data obtained by the temperature sensor 33 is transmitted to the temperature controller 32, providing a decision basis for the operation of the temperature controller 32.

[0033] like Figure 1As shown, the control system 2 can be electrically connected to multiple heating plates 1 to control the operation of multiple heating plates 1. In the same space, multiple solenoid valves 4 are generally integrated to work together. The ambient temperature in the same space is not much different. If multiple solenoid valves 4 are installed in this space, the temperature of each solenoid valve 4 is not much different, and the same is true whether the valve core is frozen and cannot work normally. In the face of this situation, it is only necessary to set a temperature controller 32 and a temperature sensor 33 in the environment to determine whether the solenoid valve 4 in the same space needs to start the heating plate 1 to work. Therefore, in the face of multiple solenoid valves 4 in the same environment, only one control system is needed to realize the control of multiple heating plates 1, which reduces the number of control systems 3 and reduces the cost of using the system.

[0034] Example 3

[0035] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 1 As shown, the working current of the temperature controller 32 is 220V AC. Currently, the common power interface provides 220V AC. The working current of the temperature controller 32 is set to 220V AC, so that it can match most of the power interfaces in China and has universality.

[0036] like Figure 1 As shown, the circuit connecting the temperature controller 32 and the 220V AC power source is provided with a second circuit breaker 34. The second circuit breaker 34 can be used to prevent the temperature controller 32 from being damaged due to circuit overload.

[0037] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A solenoid valve heating system, characterized in that: The invention comprises a heating plate (1) and a power supply system (2); the heating plate (1) is provided with a fixing structure (11) for fixing the heating plate (1) to the surface of a solenoid valve (4); the heating plate (1) is electrically heated; the power supply system (2) is electrically connected to the heating plate (1); the working current of the heating plate (1) is 24V direct current; and the power supply system (2) is provided with a conversion device capable of converting 220V alternating current into 24V direct current.

2. The solenoid valve heating system according to claim 1, characterized in that: A first circuit breaker (12) is provided on the circuit connecting the heating plate (1) and the power supply system (2).

3. The solenoid valve heating system according to claim 1, characterized in that: The fixing structure (11) is a threaded hole, a plurality of which are provided, and the threaded hole is screw-connected to the mounting hole (41) on the solenoid valve (4).

4. The solenoid valve heating system according to claim 1, characterized in that: It also comprises a control system (3) for controlling the operation of the heating plate (1), wherein the control system (3) is connected in series in a circuit connecting the heating plate (1) and the power supply system (2).

5. The solenoid valve heating system according to claim 4, characterized in that: The control system (3) comprises a solid-state relay (31) and a temperature controller (32); the solid-state relay (31) is connected in series in a circuit connecting the heating plate (1) and the power supply system (2); and the temperature controller (32) is electrically connected to the solid-state relay (31).

6. The solenoid valve heating system according to claim 5, characterized in that: The temperature controller (32) is also provided with a temperature sensor (33), and the temperature sensor (33) is electrically connected to the temperature controller (32).

7. The solenoid valve heating system according to claim 4, characterized in that: The control system (3) can be electrically connected to the plurality of heating plates (1) to control the operation of the plurality of heating plates (1).

8. The solenoid valve heating system according to claim 5, characterized in that: The operating current of the temperature controller (32) is 220V alternating current.

9. The solenoid valve heating system according to claim 8, characterized in that: A second circuit breaker (34) is provided on the circuit connecting the temperature controller (32) and the 220V AC power supply.

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