Device for preventing dry burning of electric heater in water treatment

Abstract

The utility model provides a device for preventing dry burning of an electric heater in water treatment, which comprises a main water inlet pipeline and a main water outlet pipeline, and a first heating pipeline and a second heating pipeline which are connected in parallel are arranged between the main water inlet pipeline and the main water outlet pipeline. A first water inlet control valve, a first pressure sensor, a first flow sensor, a first electric heater and a first temperature detector are arranged on the first heating pipeline; a second water inlet control valve, a second pressure sensor, a second flow sensor, a second electric heater and a second temperature detector are arranged on the second heating pipeline; each of the first electric heater and the second electric heater is provided with a water inlet end and a water outlet end; the first water inlet control valve, the second water inlet control valve, the first pressure sensor, the second pressure sensor, the first flow sensor, the second flow sensor, the first temperature detector, the second temperature detector, the first electric heater and the second electric heater are all electrically connected with the terminal processor. The water treatment device has the beneficial effects that the principle is simple, the operation is simple and convenient, equipment damage caused by dry burning of the electric heater in the water treatment process can be effectively prevented, the influence of manual switching of standby equipment due to the damage of the electric heater is reduced to the maximum extent, and the working efficiency is improved; by adding the bypass and the valve, the electric heater is turned off without too high water temperature during heating in summer, electricity and energy are saved, corrosion of the electric heater can be avoided, and the service life of the electric heater is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of electric heating equipment, in particular to a device for preventing an electric heater from dry burning in water treatment. Background Art

[0002] At present, most of the methods used in China to prevent electric heaters from burning dry are temperature control methods, that is, when the temperature exceeds the set critical temperature, control is performed and the electric heater is powered off for protection. For example, patent number CN208687975U, patent name A heating component with temperature measurement, and patent number CN204862692U, patent name A constant temperature heating yogurt machine, both use embedded instant temperature measurement to prevent heating components from burning dry. However, when the electric heater burns dry due to lack of liquid during the water treatment process, the increase in temperature is the increase in gas in the cavity, and it is not accurate to use this as a judgment standard. Moreover, the electric heater uses temperature to control its opening and closing states during the water treatment process, and does not judge the state when there is a lack of water. If there are no preventive measures to prevent dry burning, the electric heater will be damaged during dry burning, reducing the life of the electric heater and increasing safety hazards; when the electric heater burns dry, the current treatment method is to shut down for maintenance and manually open the spare pipeline, which will affect the overall efficiency. Utility Model Content

[0003] In order to solve the above difficulties, the utility model provides a device for preventing an electric heater from drying out during water treatment.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A device for preventing an electric heater from dry-burning in water treatment, comprising a total water inlet pipeline and a total water outlet pipeline, wherein a first heating pipeline and a second heating pipeline connected in parallel are arranged between the total water inlet pipeline and the total water outlet pipeline, wherein the first heating pipeline is provided with a first water inlet control valve, a first pressure sensor, a first flow sensor, a first electric heater and a first temperature detector; the second heating pipeline is provided with a second water inlet control valve, a second pressure sensor, a second flow sensor, a second electric heater and a second temperature detector; the first electric heater and the second electric heater are both provided with a water inlet end and a water outlet end; the first water inlet control valve, the second water inlet control valve, the first pressure sensor, the second pressure sensor, the first flow sensor, the second flow sensor, the first temperature detector, the second temperature detector, the first electric heater and the second electric heater are all electrically connected to a terminal processor.

[0006] Preferably, the first water inlet control valve is arranged at the water inlet end of the first electric heater, the first pressure sensor and the first flow sensor are arranged between the first water inlet control valve and the first electric heater, and the first temperature detector is arranged at the water outlet end of the first electric heater.

[0007] Preferably, the second water inlet control valve is arranged at the water inlet end of the second electric heater, the second pressure sensor and the second flow sensor are arranged between the second water inlet control valve and the second electric heater, and the second temperature detector is arranged at the water outlet end of the second electric heater.

[0008] Preferably, the first heating pipeline is provided with a first inspection valve and a first check valve, the first inspection valve is arranged between the water outlet end of the first electric heater and the first temperature detector, and the first check valve is arranged between the first temperature detector and the main water outlet pipeline; the second heating pipeline is provided with a second inspection valve and a second check valve, the second inspection valve is arranged between the water outlet end of the second electric heater and the second temperature detector, and the second check valve is arranged between the second temperature detector and the main water outlet pipeline.

[0009] Preferably, a third water inlet pipeline is connected between the main water inlet pipeline and the main water outlet pipeline, and the third water inlet pipeline is connected in parallel with the first water inlet pipeline and the second water inlet pipeline respectively.

[0010] Preferably, the third water inlet pipeline is provided with a third water inlet control valve and a third check valve, and the third water inlet control valve is electrically connected to the terminal processor.

[0011] Preferably, the main water inlet pipeline is provided with a main water inlet valve, and the main water outlet pipeline is provided with a main water outlet valve.

[0012] The beneficial effects of the utility model are as follows: the utility model has a simple principle and is easy to operate. It can effectively prevent equipment damage caused by dry burning of the electric heater during water treatment, minimize damage to the electric heater, reduce the impact of manual switching of backup equipment, and improve work efficiency. By adding bypasses and valves, the electric heater can be turned off when the water temperature does not need to be too high in summer, saving electricity and energy. At the same time, it can avoid corrosion of the electric heater and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the electrical connection structure of the terminal processor of the utility model;

[0015] Among them: main water inlet pipeline 1, main water inlet valve 11, main water outlet pipeline 2, main water outlet valve 21, first heating pipeline 3, first water inlet control valve 31, first pressure sensor 32, first flow sensor 33, first electric heater 34, first temperature detector 35, first inspection valve 36, first check valve 37, second heating pipeline 4, second water inlet control valve 41, second pressure sensor 42, second flow sensor 43, second electric heater 44, second temperature detector 45, second inspection valve 46, second check valve 47, terminal processor 5, water inlet end 6, water outlet end 7, third water inlet pipeline 8, third water inlet control valve 81, third check valve 82. DETAILED DESCRIPTION

[0016] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0017] In the description of the present invention, it should be noted that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0018] like Figure 1 to Figure 2 As shown, the utility model provides a device for preventing electric heaters from dry burning in water treatment, which includes a main water inlet pipeline 1 and a main water outlet pipeline 2, a first heating pipeline 3 and a second heating pipeline 4 connected in parallel are arranged between the main water inlet pipeline 1 and the main water outlet pipeline 2, the first heating pipeline 3 and the second heating pipeline 4 are both connected to the main water inlet pipeline 1 and the main water outlet pipeline 2, so that liquid enters from the main water inlet pipe 1, passes through the first heating pipeline 3 or the second heating pipeline 4 for heating, and then flows out through the main water outlet pipeline 2.

[0019] Furthermore, the first heating pipeline 3 is provided with a first water inlet control valve 31, a first pressure sensor 32, a first flow sensor 33, a first electric heater 34 and a first temperature detector 35. The second heating pipeline 4 is provided with a second water inlet control valve 41, a second pressure sensor 42, a second flow sensor 43, a second electric heater 44 and a second temperature detector 45. By opening and closing the first water inlet control valve 31 and the second water inlet control valve 41 to switch the liquid through the first heating pipeline 3 or the second heating pipeline 4, when one of the electric heaters is damaged, it can be switched to the other one for heating treatment, thereby minimizing the impact caused by the damage of the electric heater.

[0020] The first water inlet control valve 31 , the second water inlet control valve 41 , the first pressure sensor 32 , the second pressure sensor 42 , the first flow sensor 33 , the second flow sensor 43 , the first temperature detector 35 , the second temperature detector 45 , the first electric heater 34 , and the second electric heater 44 are all electrically connected to the terminal processor 5 .

[0021] The first pressure sensor 32, the first flow sensor 33, the first temperature detector 35, the second pressure sensor 42, the second flow sensor 43, and the second temperature detector 45 of the utility model are all common existing structures in the field, which are used to measure the pressure, flow and temperature data of the first heating pipeline 3 and the second heating pipeline 4 and send them to the terminal processor 5. The terminal processor 5 can open and close the first water inlet control valve 31 and the second water inlet control valve 41 as needed, and can also adjust the power of the first electric heater 34 and the second electric heater 44 to meet the required temperature of the liquid.

[0022] The first electric heater 34 and the second electric heater 44 are both provided with a water inlet end 6 and a water outlet end 7, the first water inlet control valve 31 is provided at the water inlet end 6 of the first electric heater 34, the first pressure sensor 32 and the first flow sensor 33 are provided between the first water inlet control valve 31 and the first electric heater 34, and the first temperature detector 35 is provided at the water outlet end 7 of the first electric heater 34. The second water inlet control valve 41 is provided at the water inlet end 6 of the second electric heater 44, the second pressure sensor 42 and the second flow sensor 43 are provided between the second water inlet control valve 41 and the second electric heater 44, and the second temperature detector 45 is provided at the water outlet end 7 of the second electric heater 44.

[0023] Further, the first heating pipeline 3 is provided with a first inspection valve 36 and a first check valve 37, the first inspection valve 36 is provided between the water outlet end 7 of the first electric heater 34 and the first temperature detector 35, and the first check valve 37 is provided between the first temperature detector 35 and the main water outlet pipeline 2. The second heating pipeline 4 is provided with a second inspection valve 46 and a second check valve 47, the second inspection valve 46 is provided between the water outlet end 7 of the second electric heater 44 and the second temperature detector 45, and the second check valve 47 is provided between the second temperature detector 45 and the main water outlet pipeline 2.

[0024] Furthermore, the main water inlet pipeline 1 is provided with a main water inlet valve 11, and the main water outlet pipeline 2 is provided with a main water outlet valve 21. A third water inlet pipeline 8 is also connected between the main water inlet pipeline 1 and the main water outlet pipeline 2, and the third water inlet pipeline 8 is respectively connected in parallel with the first water inlet pipeline 3 and the second water inlet pipeline 4. The third water inlet pipeline 8 is provided with a third water inlet control valve 81 and a third check valve 82, and the third water inlet control valve 81 is electrically connected to the terminal processor 5.

[0025] The purpose of the first check valve 37, the second check valve 47 and the third check valve 82 is to prevent the backflow of liquid from affecting the efficiency of the entire process. The first inspection valve 36 and the second inspection valve 46 can be manual ball valves, which are mainly used to facilitate the inspection of various parts of the system and the replacement of damaged equipment. When a certain equipment needs to be replaced, it can be quickly disassembled and replaced by simply closing the nearest inspection valve and control valve connected to it.

[0026] The specific real-time process of the utility model:

[0027] When the entire process is in the initial state, the main water inlet valve 11, the first water inlet valve 31, the second water inlet valve 41, the third water inlet valve 81, the first inspection valve 36, the second inspection valve 46, the first electric heater 34, and the second electric heater 44 are all in the closed state.

[0028] In the initial state, when the first heating pipeline 3 is to be operated, the main water inlet valve 11 and all the inspection valves are first manually opened, the first water inlet control valve 31 is opened, and the liquid to be heated is introduced. At this time, the first electric heater 34 is turned on, and the first heating pipeline 3 is turned on. According to the data sent to the terminal processor 5 by the first temperature detector 35, the terminal processor 5 automatically adjusts the power of the first electric heater 34 to meet the required temperature of the liquid, increases the power when the temperature is low, and reduces the power when the temperature is high. The first pressure sensor 32 and the first flow sensor 33 can not only judge whether the first heating pipeline 3 is blocked or not through the obtained data, but also be used as the data source for the terminal processor 5 to control the first electric heater 34. When the flow of the first heating pipeline 3 increases, the terminal processor will automatically increase the power of the first electric heater 34 to meet the demand; when the pressure is too high, or the flow value is too small, or both occur, it can be judged that the first heating pipeline 3 is blocked. At this time, the terminal processor 5 will reduce the power of the first electric heater 34 or close the first water inlet control valve 31 and the first electric heater 34, open the second water inlet control valve 41 and the second electric heater 44, and use the second heating pipeline 4 to work. When the pressure or flow rate of the first heating pipeline 3 is 0, it can be determined that no liquid flows through the first electric heater 34, and the first electric heater 34 is always kept closed to avoid dry burning. At this time, the first heating pipeline 3 can be partially repaired, and the second electric heater 44 partially undertakes the heating work, which will not affect the overall heating progress.

[0029] In the initial state, when the second heating pipeline 4 is to be operated, the steps are similar to the previous ones. First, manually open the main water inlet valve 11 and all the inspection valves, open the second water inlet control valve 41, and pass the liquid to be heated. At this time, the second electric heater 44 is turned on, and the second heating pipeline 4 is turned on. The terminal processor 5 automatically adjusts the power of the second electric heater 44 to meet the required temperature of the liquid according to the data sent to the terminal processor 5 by the second 45 temperature detector, and increases the power when the temperature is low, and reduces the power when it is high. The second pressure sensor 42 and the second flow sensor 43 can not only judge whether the second heating pipeline 4 is partially blocked by the obtained data, but also be used as the data source for the terminal processor 5 to control the second electric heater 44. When the flow of the second heating pipeline 4 increases, the terminal processor 5 will automatically increase the power of the second electric heater 44 to meet the demand; when the pressure of the second heating pipeline 4 is too high, or the flow value is too small, or both occur, it can be judged that the second heating pipeline 4 is partially blocked. At this time, the terminal processor 5 will reduce the power of the second electric heater 44 to continue working, or close the second water inlet control valve 41 and the second electric heater 44, open the first water inlet valve control 31 and the first electric heater 34, and use the first heating pipeline 3 to work. When the pressure of the second heating pipeline 4 is 0 or the flow rate is 0, it can be judged that no liquid flows through the second electric heater 44. At this time, the second electric heater 44 always remains in a closed state to avoid dry burning. At this time, some problems in the second heating pipeline 4 can be repaired, and the first electric heater 34 partially undertakes the heating work, which will not affect the overall heating progress.

[0030] When both the first electric heater 34 and the second electric heater 44 have problems and cannot be turned on, in order not to affect the water treatment process, the first water inlet control valve 31 and the second water inlet control valve 41, as well as the first electric heater 34 and the second electric heater 44, can be closed, and the third water inlet valve 81 can be opened to allow the liquid to directly enter the next process through the third water inlet pipeline 8; this operation is only applicable to systems where the set heating temperature does not increase much or the temperature has only a small impact on the efficiency of subsequent processes, or in high temperatures in summer, the water inlet temperature is close to the required temperature and does not need to be heated, and power saving and energy saving can be achieved (considered as special case 1), and the liquid no longer enters the first heating pipeline 3 and the second heating pipeline 4 to reduce corrosion. If the impact is large, the system will quickly return to the initial state, and the two sides will be manually repaired and resumed. If there is a liquid flow overload, the terminal controller will close the third water inlet control valve 8, and open the first electric heating pipeline 3 and the second electric heating pipeline 4 for processing at the same time. The terminal controller will automatically adjust the corresponding power of the electric heater to meet the demand (considered as special case 2).

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for preventing an electric heater from drying out in water treatment, comprising a main water inlet pipeline and a main water outlet pipeline, characterized in that: A first heating pipeline and a second heating pipeline connected in parallel are arranged between the main water inlet pipeline and the main water outlet pipeline, and the first heating pipeline is provided with a first water inlet control valve, a first pressure sensor, a first flow sensor, a first electric heater and a first temperature detector; the second heating pipeline is provided with a second water inlet control valve, a second pressure sensor, a second flow sensor, a second electric heater and a second temperature detector; the first electric heater and the second electric heater are both provided with a water inlet end and a water outlet end; the first water inlet control valve, the second water inlet control valve, the first pressure sensor, the second pressure sensor, the first flow sensor, the second flow sensor, the first temperature detector, the second temperature detector, the first electric heater and the second electric heater are all electrically connected to the terminal processor.

2. The device for preventing electric heater from drying out in water treatment according to claim 1, characterized in that: The first water inlet control valve is arranged at the water inlet end of the first electric heater, the first pressure sensor and the first flow sensor are arranged between the first water inlet control valve and the first electric heater, and the first temperature detector is arranged at the water outlet end of the first electric heater.

3. The device for preventing electric heater from drying out in water treatment according to claim 2, characterized in that: The second water inlet control valve is arranged at the water inlet end of the second electric heater, the second pressure sensor and the second flow sensor are arranged between the second water inlet control valve and the second electric heater, and the second temperature detector is arranged at the water outlet end of the second electric heater.

4. The device for preventing electric heater from drying out in water treatment according to claim 3, characterized in that: The first heating pipeline is provided with a first inspection valve and a first check valve, the first inspection valve is arranged between the water outlet end of the first electric heater and the first temperature detector, and the first check valve is arranged between the first temperature detector and the main water outlet pipeline; the second heating pipeline is provided with a second inspection valve and a second check valve, the second inspection valve is arranged between the water outlet end of the second electric heater and the second temperature detector, and the second check valve is arranged between the second temperature detector and the main water outlet pipeline.

5. The device for preventing electric heater from drying out in water treatment according to claim 1, characterized in that: A third water inlet pipeline is connected between the main water inlet pipeline and the main water outlet pipeline, and the third water inlet pipeline is connected in parallel with the first heating pipeline and the second heating pipeline respectively.

6. The device for preventing electric heater from drying out in water treatment according to claim 5, characterized in that: The third water inlet pipeline is provided with a third water inlet control valve and a third check valve, and the third water inlet control valve is electrically connected to the terminal processor.

7. The device for preventing electric heater from drying out in water treatment according to claim 1, characterized in that: The main water inlet pipeline is provided with a main water inlet valve, and the main water outlet pipeline is provided with a main water outlet valve.

Images