Energy-saving explosion-proof electric heater

Abstract

The utility model discloses an energy-saving explosion-proof electric heater in the field of heaters, which comprises an electric heater main body, a heat insulation cylinder mounted on the inner side of the electric heater main body, an explosion-proof shell mounted on the outer side of the electric heater main body, a mounting plate mounted at the upper end of the explosion-proof shell, and a PLC (programmable logic controller) mounted in the middle of the upper surface of the mounting plate. A plurality of electric heating pipes are installed at the positions, located on the inner side of the heat insulation barrel, of the middle of the lower surface of the installation disc at intervals, a liquid inlet pipe communicating with the inner side of the heat insulation barrel is installed at the top of one side of the electric heater body, and a flow velocity sensor is installed in the middle of the upper side of the inner ring face of the liquid inlet pipe. When the liquid medium is stopped from being conveyed into the liquid inlet pipe, the electric heating pipe in the electric heater can be closed in time, waste of electric energy and heat energy is avoided, and the electric heater can be used in an energy-saving mode.

Description

Technical Field

[0001] The utility model relates to the field of heaters, in particular to an energy-saving explosion-proof electric heater. Background Art

[0002] Electric heater is a commonly used electric heating device. Electric heater refers to an electrical appliance that uses electric energy to achieve heating effect. It has the advantages of small size, high heating power and wide application. When using electric heater, it also has the advantages of wide application range, long life and high reliability. The core of electric heater when using is energy conversion, and the most common is the conversion of electrical energy into thermal energy.

[0003] Electric heaters can heat and raise the temperature of flowing liquid or gaseous media. When the heating medium passes through the heating chamber of the electric heater under pressure, the fluid thermodynamics principle is used to evenly carry away the huge heat generated by the electric heating element during operation, so that the temperature of the heated liquid or gaseous medium reaches the required level for use.

[0004] However, when the existing electric heater is used, it is not conducive to detecting the flowing liquid medium. When the outside stops transporting the liquid medium into the electric heater, it is not convenient to close the electric heating tube in the electric heater in time, which easily causes waste of electric energy and heat energy and is not conducive to energy-saving use of the electric heater.

[0005] Therefore, we proposed an energy-saving explosion-proof electric heater. Utility Model Content

[0006] The purpose of the utility model is to provide an energy-saving explosion-proof electric heater to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An energy-saving explosion-proof electric heater comprises an electric heater body, an insulating cylinder is installed on the inner side of the electric heater body, an explosion-proof shell is installed on the outer side of the electric heater body, a mounting plate is installed on the upper end of the explosion-proof shell, a PLC controller is installed in the middle of the upper surface of the mounting plate, a plurality of electric heating tubes are installed at intervals on the inner side of the insulating cylinder in the middle of the lower surface of the mounting plate, the electric heating tubes are electrically connected to the PLC controller, a liquid inlet pipe connected to the inner side of the insulating cylinder is installed on the top of one side of the electric heater body, a liquid outlet pipe connected to the inner side of the insulating cylinder is installed on the bottom of one side of the electric heater body, a flow rate sensor is installed in the middle of the upper side of the inner ring surface of the liquid inlet pipe, and the flow rate sensor is electrically connected to the PLC controller.

[0009] As a further solution of the utility model: a temperature sensor is installed in the middle of one side of the inner ring surface of the insulation cylinder, the temperature sensor penetrates the inner ring surface and the outer ring surface at corresponding positions on the insulation cylinder, the temperature sensor penetrates the inner ring surface and the outer ring surface at corresponding positions on the electric heater body, the temperature sensor penetrates the inner ring surface and the outer ring surface at corresponding positions on the explosion-proof shell, and the temperature sensor is electrically connected to the PLC controller.

[0010] By adopting the above technical solution: the temperature sensor is provided to detect the temperature inside the heat insulation cylinder.

[0011] As a further solution of the utility model: the upper end of the electric heater body is in an open state, the upper end of the insulation tube is in an open state, the outer surface of the insulation tube and the inner surface of the electric heater body are in a matching and fitting state, the upper end of the explosion-proof shell is in an open state, and the lower end of the electric heating tube extends to the bottom of the insulation tube.

[0012] By adopting the above technical solution: the provision of an explosion-proof shell, the main body of the electric heater can be explosion-proof and protected.

[0013] As a further solution of the utility model: the liquid inlet pipe is in a horizontal state, the flow rate sensor penetrates the inner annular surface and the outer surface at the corresponding position on the liquid inlet pipe, the liquid inlet pipe penetrates the inner annular surface and the outer surface at the corresponding position on the explosion-proof shell, and a matching first retention hole is opened on the explosion-proof shell corresponding to the liquid inlet pipe.

[0014] By adopting the above technical solution: the flow rate sensor is provided, the flow rate of the liquid medium in the liquid inlet pipe can be detected.

[0015] As a further solution of the utility model: a matching first through hole is opened on the inner ring surface of the electric heater body corresponding to the liquid inlet pipe, and the first through hole penetrates the inner ring surface and the outer ring surface at corresponding positions on the electric heater body and the insulation cylinder.

[0016] By adopting the above technical solution: the provision of the first through hole helps to connect the inside of the liquid inlet pipe with the inside of the insulation cylinder.

[0017] As a further solution of the utility model: the liquid outlet pipe is in a horizontal state, and the liquid outlet pipe passes through the inner annular surface and the outer surface at the corresponding position on the explosion-proof shell, a matching second retention hole is opened on the explosion-proof shell corresponding to the liquid outlet pipe, and a matching second through hole is opened on the inner annular surface of the electric heater body corresponding to the liquid outlet pipe, and the second through hole passes through the inner annular surface and the outer annular surface at the corresponding position on the electric heater body and the insulation cylinder.

[0018] By adopting the above technical solution: the provision of the second through hole helps to connect the inside of the liquid outlet pipe with the inside of the insulation cylinder.

[0019] As a further solution of the utility model: a first bolt is threadedly inserted in the vertical direction between the four sides of the mounting plate and the corresponding positions on the explosion-proof shell, and the lower end of the first bolt passes through the upper surface and the lower surface of the corresponding position on the mounting plate and is threadedly inserted into the corresponding position on the explosion-proof shell.

[0020] By adopting the above technical solution: the provision of the first bolt is helpful for installation between the mounting plate and the explosion-proof shell.

[0021] As a further solution of the utility model: a mounting plate is installed on the lower surface of the explosion-proof shell, and second bolts are threadedly inserted into the four corners of the mounting plate along the vertical direction. The second bolts are in a vertical state and penetrate the upper and lower surfaces at corresponding positions on the mounting plate.

[0022] By adopting the above technical solution: the provision of the second bolt helps to install and limit the mounting plate.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. In the utility model, if the flow rate sensor cannot detect the flow of liquid, the flow rate sensor will turn off the electric heating tube through the PLC controller. When the liquid is not transported into the insulation tube, the electric heating tube can be turned off in time to prevent the waste of electric energy and heat energy. When in use, it is helpful to detect the liquid medium flowing in the liquid inlet pipe. When the liquid medium is stopped being transported into the liquid inlet pipe, the electric heating tube in the electric heater can be turned off in time to avoid the waste of electric energy and heat energy, which helps to use the electric heater in an energy-saving way.

[0025] 2. In the utility model, the insulation tube can insulate the heat inside the insulation tube, avoid the loss of heat inside the insulation tube and cause heat waste, which is helpful to use the electric heater in an energy-saving way. The temperature sensor can transmit the detected temperature data information to the PLC controller. When the temperature sensor detects that the temperature of the liquid in the insulation tube exceeds the preset value, the PLC controller will turn off the electric heating tube, which can prevent the temperature in the insulation tube from being abnormally high and causing danger, so as to facilitate the safe use of the electric heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model;

[0027] Figure 2 This is a schematic diagram of the heat insulation cylinder structure of the utility model;

[0028] Figure 3 This is a schematic diagram of the mounting plate structure of the utility model;

[0029] Figure 4It is a schematic diagram of the installation disk structure of the utility model.

[0030] In the figure: 1. Electric heater body; 2. Explosion-proof shell; 3. Insulation tube; 4. Mounting plate; 5. Mounting plate; 6. First bolt; 7. Second bolt; 8. Electric heating tube; 9. Liquid inlet pipe; 10. Liquid outlet pipe; 11. First retention hole; 12. Second retention hole; 13. PLC controller; 14. Temperature sensor; 15. Flow rate sensor; 16. First through hole; 17. Second through hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figures 1 to 4 In the embodiment of the utility model, an energy-saving explosion-proof electric heater comprises an electric heater body 1, an insulation tube 3 is installed on the inner side of the electric heater body 1, an explosion-proof shell 2 is installed on the outer side of the electric heater body 1, a mounting plate 4 is installed on the upper end of the explosion-proof shell 2, a PLC controller 13 is installed in the middle of the upper surface of the mounting plate 4, a plurality of electric heating tubes 8 are installed at intervals on the inner side of the insulation tube 3 in the middle of the lower surface of the mounting plate 4, the electric heating tubes 8 are electrically connected to the PLC controller 13, a liquid inlet pipe 9 connected to the inner side of the insulation tube 3 is installed on the top of one side of the electric heater body 1, a liquid outlet pipe 10 connected to the inner side of the insulation tube 3 is installed on the bottom of one side of the electric heater body 1, and a liquid inlet pipe 9 is installed in the liquid inlet pipe 9. A flow rate sensor 15 is installed in the middle of the upper side of the annular surface. The flow rate sensor 15 is electrically connected to the PLC controller 13. When the flow rate sensor 15 cannot detect the flow of liquid, the flow rate sensor 15 will close the electric heating tube 8 through the PLC controller 13. When liquid is not transported into the insulation tube 3, the electric heating tube 8 can be closed in time to prevent waste of electrical energy and thermal energy. When in use, it is helpful to detect the liquid medium flowing in the liquid inlet pipe 9. When the liquid medium is stopped being transported into the liquid inlet pipe 9, the electric heating tube 8 in the electric heater can be closed in time to avoid waste of electrical energy and thermal energy, which helps to use the electric heater in an energy-saving manner.

[0033] Among them, a temperature sensor 14 is installed in the middle of one side of the inner ring surface of the insulation tube 3, the temperature sensor 14 penetrates the inner ring surface and the outer ring surface at the corresponding position on the insulation tube 3, the temperature sensor 14 penetrates the inner ring surface and the outer ring surface at the corresponding position on the electric heater body 1, the temperature sensor 14 penetrates the inner ring surface and the outer ring surface at the corresponding position on the explosion-proof shell 2, the temperature sensor 14 is electrically connected to the PLC controller 13, and the temperature sensor 14 can detect the temperature inside the insulation tube 3; the upper end of the electric heater body 1 is in an open state, the upper end of the insulation tube 3 is in an open state, the outer surface of the insulation tube 3 and the inner surface of the electric heater body 1 are in a matching and fitting state, the upper end of the explosion-proof shell 2 is in an open state, the lower end of the electric heating tube 8 extends to the bottom of the insulation tube 3, and the explosion-proof shell 2 can perform explosion-proof and protection on the electric heater body 1.

[0034] The liquid inlet pipe 9 is in a horizontal state, and the flow rate sensor 15 penetrates the inner annular surface and the outer surface at the corresponding position on the liquid inlet pipe 9, and the liquid inlet pipe 9 penetrates the inner annular surface and the outer surface at the corresponding position on the explosion-proof shell 2. A matching first retention hole 11 is opened on the explosion-proof shell 2 corresponding to the liquid inlet pipe 9, and the flow rate sensor 15 can detect the flow rate of the liquid medium in the liquid inlet pipe 9; a matching first through hole 16 is opened on the inner annular surface of the electric heater body 1 corresponding to the liquid inlet pipe 9, and the first through hole 16 penetrates the inner annular surface and the outer annular surface at the corresponding position on the electric heater body 1 and the insulation tube 3. The hole 16 helps to connect the inside of the liquid inlet pipe 9 with the inside of the insulation tube 3; the liquid outlet pipe 10 is in a horizontal state, and the liquid outlet pipe 10 passes through the inner annular surface and the outer surface at the corresponding position on the explosion-proof shell 2. A matching second retention hole 12 is opened on the explosion-proof shell 2 corresponding to the liquid outlet pipe 10, and a matching second through hole 17 is opened on the inner annular surface of the electric heater body 1 corresponding to the liquid outlet pipe 10. The second through hole 17 passes through the inner annular surface and the outer annular surface at the corresponding position on the electric heater body 1 and the insulation tube 3. The second through hole 17 helps to connect the inside of the liquid outlet pipe 10 with the inside of the insulation tube 3.

[0035] A first bolt 6 is threadedly inserted in the vertical direction between the four sides of the mounting disk 4 and the corresponding positions on the explosion-proof shell 2. The lower end of the first bolt 6 passes through the upper surface and the lower surface of the corresponding position on the mounting disk 4 and is threadedly inserted into the corresponding position on the explosion-proof shell 2. The first bolt 6 helps to install the mounting disk 4 and the explosion-proof shell 2; a mounting plate 5 is installed on the lower surface of the explosion-proof shell 2, and second bolts 7 are threadedly inserted in the vertical direction at the four corners of the mounting plate 5. The second bolts 7 are in a vertical state and pass through the upper surface and the lower surface of the corresponding position on the mounting plate 5. The second bolts 7 help to install and limit the mounting plate 5.

[0036] The working principle of the utility model is: during use, the lower surface of the mounting plate 5 is corresponded to the position where the outside world needs to install, so that the lower surface of the mounting plate 5 and the position where the outside world needs to install are in a matching and fitting state, and the mounting plate 5 is further installed between the position where the outside world needs to install through the second bolt 7. The second bolt 7 can fix and limit the mounting plate 5, which is convenient for stable use of the mounting plate 5. The mounting plate 5 can support and limit the explosion-proof shell 2, which is helpful for stable use of the explosion-proof shell 2. The explosion-proof shell 2 can support and limit the electric heater body 1 and the various components assembled on the electric heater body 1, which is convenient for stable use of the electric heater body 1 and the various components assembled on the electric heater body 1.

[0037] The end of the liquid inlet pipe 9 away from the explosion-proof shell 2 is installed between the external liquid delivery pipe, and the end of the liquid outlet pipe 10 away from the explosion-proof shell 2 is installed between the external liquid discharge pipe. The external liquid delivery pipe can transport the liquid to be heated into the liquid inlet pipe 9. The first retention hole 11 on the electric heater body 1 and the explosion-proof shell 2 can fix and limit the liquid inlet pipe 9, which is helpful for the stable use of the liquid inlet pipe 9. Further open the flow rate sensor 15, the liquid inlet pipe 9 can fix and limit the flow rate sensor 15, which is convenient for the stable use of the flow rate sensor 15. The liquid can enter the insulation tube 3 through the liquid inlet pipe 9 and the electric heater body 1 and the first through hole 16 on the insulation tube 3. When the liquid flows along the liquid inlet pipe 9 toward the inside of the insulation tube 3, the flow rate sensor 15 can detect the flow rate of the liquid in the liquid inlet pipe 9.

[0038] When the flow rate sensor 15 detects that liquid is flowing in the liquid inlet pipe 9, the flow rate sensor 15 will transmit the detected data information to the PLC controller 13, and the PLC controller 13 will be opened. The mounting disk 4 can fix and limit the PLC controller 13, which is conducive to the stable use of the PLC controller 13. When the PLC controller 13 is in the opened state, after the PLC controller 13 receives the data information that liquid is flowing in the liquid inlet pipe 9 transmitted by the flow rate sensor 15, the PLC controller 13 will open the electric heating tube 8, and the mounting disk 4 can fix and limit the electric heating tube 8, which is convenient for the stable use of the electric heating tube 8. When the electric heating tube 8 is in the opened state, the electric heating tube 8 will heat the liquid entering the insulation tube 3, and the insulation tube 3 can insulate the heat in the insulation tube 3 to avoid the loss of heat inside the insulation tube 3 causing heat waste, which is conducive to the energy-saving use of the electric heater.

[0039] The temperature sensor 14 can detect the temperature of the heated liquid in the insulation tube 3, and the temperature sensor 14 can transmit the detected temperature data information to the PLC controller 13. When the temperature sensor 14 detects that the temperature of the liquid in the insulation tube 3 exceeds the preset value, the PLC controller 13 will close the electric heating tube 8, which can prevent the abnormal temperature in the insulation tube 3 from being too high and causing danger, so as to safely use the electric heater. The liquid after heating in the insulation tube 3 will be discharged into the liquid outlet pipe 10 through the electric heater body 1 and the second through hole 17 on the insulation tube 3. The second retention hole 12 on the electric heater body 1 and the explosion-proof shell 2 can fix and limit the liquid outlet pipe 10, which is helpful for the stable use of the liquid outlet pipe 10. The liquid after heating in the liquid outlet pipe 10 will be transported to the drainage pipe connected to the outside.

[0040] When the external liquid delivery pipeline stops delivering liquid to the liquid inlet pipe 9, the flow rate sensor 15 cannot detect the flow of liquid. The flow rate sensor 15 will close the electric heating tube 8 through the PLC controller 13. When liquid is not delivered to the insulation tube 3, the electric heating tube 8 can be closed in time to prevent waste of electrical energy and thermal energy, which is helpful for energy-saving use of the electric heater. The explosion-proof shell 2 can explosion-proof and protect the outside of the electric heater body 1 to facilitate normal use of the electric heater body 1.

[0041] When it is necessary to disassemble the mounting plate 4 and the explosion-proof shell 2, the first bolt 6 is rotated and removed, so that the first bolt 6 cancels the limit between the mounting plate 4 and the explosion-proof shell 2, so as to facilitate the disassembly and removal of the mounting plate 4. After the mounting plate 4 is disassembled and removed, the various components assembled on the mounting plate 4 can be conveniently repaired, which is helpful for the use of the electric heater.

[0042] During use, it helps to detect the liquid medium flowing in the liquid inlet pipe 9. When the liquid medium is stopped from being transported in the liquid inlet pipe 9, the electric heating tube 8 in the electric heater can be turned off in time to avoid wasting electrical energy and thermal energy, which helps to use the electric heater in an energy-saving manner.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An energy-saving explosion-proof electric heater, comprising an electric heater body (1), characterized in that: A heat insulating tube (3) is installed on the inner side of the electric heater body (1), an explosion-proof shell (2) is installed on the outer side of the electric heater body (1), a mounting plate (4) is installed on the upper end of the explosion-proof shell (2), a PLC controller (13) is installed in the middle of the upper surface of the mounting plate (4), a plurality of electric heating tubes (8) are installed in the middle of the lower surface of the mounting plate (4) located inside the heat insulating tube (3), the electric heating tubes (8) and the PLC controller (13) are electrically connected, a liquid inlet pipe (9) connected to the inner side of the heat insulating tube (3) is installed on the top of one side of the electric heater body (1), a liquid outlet pipe (10) connected to the inner side of the heat insulating tube (3) is installed on the bottom of one side of the electric heater body (1), a flow rate sensor (15) is installed in the middle of the upper side of the inner ring surface of the liquid inlet pipe (9), and the flow rate sensor (15) and the PLC controller (13) are electrically connected.

2. The energy-saving explosion-proof electric heater according to claim 1, characterized in that: A temperature sensor (14) is installed in the middle of one side of the inner ring surface of the heat insulating tube (3); the temperature sensor (14) penetrates the inner ring surface and the outer ring surface at corresponding positions on the heat insulating tube (3); the temperature sensor (14) penetrates the inner ring surface and the outer ring surface at corresponding positions on the electric heater body (1); the temperature sensor (14) penetrates the inner ring surface and the outer ring surface at corresponding positions on the explosion-proof shell (2); and the temperature sensor (14) is electrically connected to the PLC controller (13).

3. The energy-saving explosion-proof electric heater according to claim 2, characterized in that: The upper end of the electric heater body (1) is in an open state, the upper end of the heat-insulating tube (3) is in an open state, the outer surface of the heat-insulating tube (3) and the inner surface of the electric heater body (1) are in a matching and fitting state, the upper end of the explosion-proof shell (2) is in an open state, and the lower end of the electric heating tube (8) extends to the bottom of the heat-insulating tube (3).

4. The energy-saving explosion-proof electric heater according to claim 3 is characterized in that: The liquid inlet pipe (9) is in a horizontal state, the flow rate sensor (15) penetrates the inner annular surface and the outer surface at corresponding positions on the liquid inlet pipe (9), the liquid inlet pipe (9) penetrates the inner annular surface and the outer surface at corresponding positions on the explosion-proof shell (2), and a matching first retention hole (11) is opened on the explosion-proof shell (2) corresponding to the liquid inlet pipe (9).

5. The energy-saving explosion-proof electric heater according to claim 4, characterized in that: A matching first through hole (16) is provided on the inner ring surface of the electric heater body (1) corresponding to the liquid inlet pipe (9), and the first through hole (16) penetrates the inner ring surface and the outer ring surface at corresponding positions on the electric heater body (1) and the heat insulation tube (3).

6. The energy-saving explosion-proof electric heater according to claim 5, characterized in that: The liquid outlet pipe (10) is in a horizontal state, and the liquid outlet pipe (10) penetrates the inner annular surface and the outer surface at corresponding positions on the explosion-proof shell (2). A matching second retention hole (12) is provided on the explosion-proof shell (2) corresponding to the liquid outlet pipe (10), and a matching second through hole (17) is provided on the inner annular surface of the electric heater body (1) corresponding to the liquid outlet pipe (10). The second through hole (17) penetrates the inner annular surface and the outer annular surface at corresponding positions on the electric heater body (1) and the heat insulation tube (3).

7. The energy-saving explosion-proof electric heater according to claim 6, characterized in that: A first bolt (6) is threadedly inserted in a vertical direction between the four sides of the mounting plate (4) and the corresponding positions on the explosion-proof shell (2); the lower end of the first bolt (6) penetrates the upper surface and the lower surface of the corresponding position on the mounting plate (4) and is threadedly inserted into the corresponding position on the explosion-proof shell (2).

8. The energy-saving explosion-proof electric heater according to claim 7, characterized in that: A mounting plate (5) is mounted on the lower surface of the explosion-proof shell (2), and second bolts (7) are threadedly inserted in the vertical direction at the four corners of the mounting plate (5). The second bolts (7) are in a vertical state and penetrate the upper and lower surfaces at corresponding positions on the mounting plate (5).

Images