Automatic oil supplementing control system of heat conduction oil heater

Abstract

The utility model discloses an automatic oil supplement control system of a heat conduction oil heater, which comprises a heat conduction oil heater system expansion tank, a control cabinet assembly and an oil filling pump, a magnetic turning plate liquid level meter is arranged on the heat conduction oil heater system expansion tank, and the magnetic turning plate liquid level meter is used for measuring the liquid level of heat conduction oil in the heat conduction oil heater system expansion tank; the magnetic turning plate liquid level meter is electrically connected with the control cabinet assembly, the control cabinet assembly is electrically connected with the oil filling pump, and the oil filling pump is connected with the heat conduction oil heater system expansion tank through an oil conveying pipe. An on-site anti-explosion operation column is omitted, equipment and labor cost is saved, oil supplementing is automatically controlled through liquid level detection, labor is saved, time and labor are saved, the problem that manual monitoring is needed during oil supplementing of a conventional heat conduction oil system is solved, and the phenomenon that heat conduction oil overflows is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil replenishment control for heaters, and particularly relates to an automatic oil replenishment control system for a heat-conducting oil heater. Background Technique

[0002] Heaters using a heat-conducting oil system are generally used in technological processes where high precision of medium temperature and unstable medium flow rate are required. Generally, the heat-conducting oil system does not allow oil shortage or abnormal temperature fluctuations. If conventional control methods are adopted, it is necessary to closely monitor manually and equip corresponding equipment and facilities frequently.

[0003] The conventional method is to configure an explosion-proof operation pillar on site. Each time oil is injected, a special person needs to be arranged on site to be on duty and start and stop the oil injection pump; someone also needs to monitor the liquid level of the expansion tank. The conventional method not only requires manpower, but also needs to add an explosion-proof operation pillar on site, increasing equipment and labor costs. If there are too many impurities in the heat-conducting oil, frequent oil replenishment is required, and arranging people to be on duty is time-consuming and laborious. If not noticed, the oil in the heat-conducting oil system will overflow, causing environmental problems. Therefore, we propose an automatic oil replenishment control system for a heat-conducting oil heater. Content of the Utility Model

[0004] The purpose of the utility model is to provide an automatic oil replenishment control system for a heat-conducting oil heater to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An automatic oil replenishment control system for a heat-conducting oil heater includes an expansion tank of the heat-conducting oil heater system, a control cabinet assembly, and an oil injection pump. A magnetic flap level gauge is arranged on the expansion tank of the heat-conducting oil heater system, and the magnetic flap level gauge is used to measure the heat-conducting oil level in the expansion tank of the heat-conducting oil heater system;

[0006] The magnetic flap level gauge is electrically connected to the control cabinet assembly, the control cabinet assembly is electrically connected to the oil injection pump, and the oil injection pump and the expansion tank of the heat-conducting oil heater system are connected through an oil delivery pipe.

[0007] Preferably, the magnetic flap level gauge includes two level switches, and the two level switches are respectively installed at the low liquid level and high liquid level setting positions in the expansion tank of the heat-conducting oil heater system.

[0008] Preferably, the control cabinet assembly includes a control cabinet body, a circuit breaker, an AC contactor, and a thermal relay;

[0009] The circuit breaker, the AC contactor, and the thermal relay are all installed in the control cabinet body.

[0010] Preferably, the circuit breaker is externally connected to a power supply. The circuit breaker is electrically connected to the AC contactor. Two liquid level switches of the magnetic flap liquid level gauge are electrically connected to the AC contactor. The AC contactor is electrically connected to the thermal relay. The thermal relay is connected to the oil injection pump.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] In the present utility model, when the magnetic flap liquid level gauge detects that the liquid level of the heat transfer oil in the expansion tank of the heat transfer oil heater system is low, the liquid level switch acts to make the AC contactor close. At this time, the oil injection pump starts to replenish oil into the expansion tank of the heat transfer oil heater system. When the magnetic flap liquid level gauge detects that the liquid level of the heat transfer oil in the expansion tank of the heat transfer oil heater system is high, the liquid level switch acts to make the AC contactor disconnect, and the oil injection pump stops replenishing oil into the expansion tank of the heat transfer oil heater system. The automatic oil replenishment stops, the on-site explosion-proof operation column is cancelled, saving equipment and labor costs, and the oil replenishment is automatically controlled by liquid level detection, saving labor, saving time and effort, solving the problem that manual monitoring is required during the oil replenishment of the conventional heat transfer oil system, and avoiding the phenomenon of overflow of heat transfer oil. Description of the Drawings

[0013] Figure 1 is a system schematic diagram of the present utility model;

[0014] Figure 2 is a circuit schematic diagram of the present utility model.

[0015] In the figure: 1. Expansion tank of the heat transfer oil heater system; 2. Control cabinet assembly; 201. Control cabinet body; 202. Circuit breaker; 203. AC contactor; 204. Thermal relay; 3. Oil injection pump; 4. Magnetic flap liquid level gauge. Detailed Embodiments

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figure 1, the automatic oil replenishment control system of the heat transfer oil heater provided by the present utility model includes an expansion tank 1 of the heat transfer oil heater system, a control cabinet assembly 2, and an oil injection pump 3. A magnetic flap level gauge 4 is provided on the expansion tank 1 of the heat transfer oil heater system. The magnetic flap level gauge 4 includes two level switches, and the two level switches are respectively installed at the low-level and high-level set positions in the expansion tank 1 of the heat transfer oil heater system. The magnetic flap level gauge 4 is used to measure the heat transfer oil level in the expansion tank 1 of the heat transfer oil heater system;

[0018] The magnetic flap level gauge 4 is electrically connected to the control cabinet assembly 2, and the control cabinet assembly 2 is electrically connected to the oil injection pump 3. The control cabinet assembly 2 includes a control cabinet body 201, a circuit breaker 202, a contactor 203, and a thermal relay 204; the circuit breaker 202, the contactor 203, and the thermal relay 204 are all installed in the control cabinet body 201. The circuit breaker 202 is externally connected to the power supply. The circuit breaker 202 and the contactor 203 are electrically connected. The two level switches of the magnetic flap level gauge 4 are electrically connected to the contactor 203. The contactor 203 and the thermal relay 204 are electrically connected. The thermal relay 204 is connected to the oil injection pump 3. The oil injection pump 3 and the expansion tank 1 of the heat transfer oil heater system are connected through an oil delivery pipe.

[0019] In the present utility model, when the magnetic flap level gauge 4 detects that the heat transfer oil level in the expansion tank 1 of the heat transfer oil heater system is low, the level switch acts to make the contactor 203 close. At this time, the oil injection pump 3 starts to replenish oil into the expansion tank 1 of the heat transfer oil heater system. When the magnetic flap level gauge 4 detects that the heat transfer oil level in the expansion tank 1 of the heat transfer oil heater system is high, the level switch acts to make the contactor 203 disconnect, and the oil injection pump 3 stops replenishing oil into the expansion tank 1 of the heat transfer oil heater system, and the automatic oil replenishment stops. The on-site explosion-proof operation pillar is cancelled, saving equipment and labor costs, and using level detection to automatically control oil replenishment, saving labor, time and effort, solving the problem that manual monitoring is required during the oil replenishment of the conventional heat transfer oil system, and avoiding the phenomenon of heat transfer oil overflow.

[0020] As Figure 2 shown, Figure 2 is the schematic diagram of the automatic oil replenishment control circuit of the heat transfer oil heater of the present utility model:

[0021] In Figure 2 , according to the control method of the conventional oil injection pump, the control part is designed. The control signal of the on-site explosion-proof operation pillar is cancelled and replaced with a level switch signal. Two level switches are used for refined control. The level signal will be triggered once every time it passes through the level switch and will automatically reset. The positions of the upper and lower line levels are switched and positioned on the magnetic flap level gauge. Only the first manual start or trigger of the start signal is required once during the initial operation, and the level can be automatically and accurately controlled after normal operation;

[0022] The control circuit is composed of a liquid level switch and a manual start control loop. The start circuit is formed by connecting in parallel a manual control button, a liquid level switch at the low liquid level, and a normally open contact on the input contactor, and then connecting in series a normally closed contact of the liquid level switch at the high liquid level on the line to control the AC contactor coil. At the same time, the normally closed fault point of the thermal relay is also connected in series in this loop. Once the oil injection pump is blocked or overloaded, the control power supply of the AC contactor can be cut off in time to protect the motor from damage.

[0023] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic oil replenishment control system for a thermal oil heater, characterized in that: The invention comprises a thermal oil heater system expansion tank (1), a control cabinet assembly (2) and an oil injection pump (3); the thermal oil heater system expansion tank (1) is provided with a magnetic flap liquid level gauge (4), and the magnetic flap liquid level gauge (4) is used to measure the thermal oil liquid level in the thermal oil heater system expansion tank (1); The magnetic flap level gauge (4) is electrically connected to the control cabinet assembly (2), the control cabinet assembly (2) is electrically connected to the oil injection pump (3), and the oil injection pump (3) and the thermal oil heater system expansion tank (1) are connected via an oil pipeline.

2. The automatic oil replenishment control system of a thermal oil heater according to claim 1, characterized in that: The magnetic flap liquid level gauge (4) comprises two liquid level switches, and the two liquid level switches are respectively installed at low liquid level and high liquid level setting positions in the expansion tank (1) of the thermal oil heater system.

3. The automatic oil replenishment control system of a thermal oil heater according to claim 2, characterized in that: The control cabinet assembly (2) comprises a control cabinet body (201), a circuit breaker (202), an AC contactor (203) and a thermal relay (204); The circuit breaker (202), the AC contactor (203) and the thermal relay (204) are all installed in the control cabinet body (201).

4. The automatic oil replenishment control system of a thermal oil heater according to claim 3, characterized in that: The circuit breaker (202) is connected to an external power supply, the circuit breaker (202) is electrically connected to the AC contactor (203), the two liquid level switches of the magnetic flap liquid level gauge (4) are electrically connected to the AC contactor (203), the AC contactor (203) is electrically connected to the thermal relay (204), and the thermal relay (204) is connected to the oil injection pump (3).

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