Energy-saving heating system of asphalt storage tank based on PLC control

Abstract

The utility model relates to the technical field of asphalt storage tank heating, in particular to an energy-saving heating system of an asphalt storage tank based on PLC (programmable logic controller) control, which comprises a storage unit comprising a storage tank body and heating calandria supports which are respectively positioned on the left side and the right side of the storage tank body; the heating unit comprises a lower area heating calandria and an upper area heating calandria; the lower area heating calandria and the upper area heating calandria are installed on heating calandria supports located on the left side and the right side of the storage tank body respectively. The moving unit comprises a lower part lifting motor and an upper part lifting motor which are respectively connected with the lower area heating calandria and the upper area heating calandria; the monitoring unit comprises a temperature sensor and a liquid level sensor and is used for detecting the temperature and the liquid level height of asphalt in the storage tank body; the control unit comprises a module and a computer and is used for controlling the lower area heating calandria and the upper area heating calandria to move up and down for heating; the asphalt storage tank heating device can achieve rapid and balanced heating of the asphalt storage tank and reduce energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt storage tank heating, and in particular to an energy-saving heating system of an asphalt storage tank based on PLC control. Background Art

[0002] Asphalt storage tanks are tanks used to store asphalt or modified asphalt. They can also store emulsified asphalt, modified asphalt, and mixed asphalt. Some properties of asphalt are closely related to temperature changes. The heating method and storage of asphalt have a crucial impact on the performance of asphalt after heating. The storage and heating of asphalt have a great impact on the subsequent use of asphalt.

[0003] The heating pipes of existing asphalt storage tanks are fixed at the bottom of the tanks and are heated from bottom to top. They cannot be heated flexibly. When the bottom asphalt is heated to the required temperature, the temperature of the upper asphalt may not have reached the required temperature, but the temperature of the bottom asphalt may have exceeded the required temperature, which will damage the properties of the asphalt. In addition, the heating time of the asphalt is long, the heating temperature is extremely high, and the consumption of heavy oil (diesel) used for heating is extremely large, which will cause energy waste. Summary of the invention

[0004] The purpose of the utility model is to improve and innovate the shortcomings and problems existing in the background technology, and to provide a heating system for asphalt storage tanks that can save energy consumption, reduce asphalt heating costs, save heating time, and flexibly heat. The technical solutions adopted are as follows:

[0005] An embodiment of the utility model provides an energy-saving heating system for an asphalt storage tank based on PLC control, the system specifically comprising: a storage unit, a heating unit, a mobile unit, a monitoring unit and a control unit;

[0006] The storage unit includes a storage tank body 13 and a heating pipe bracket 1, wherein there are two heating pipe brackets 1, which are respectively located on the left and right sides of the storage tank body;

[0007] The heating unit includes a lower region heating pipe 3 and an upper region heating pipe 5; the lower region heating pipe 3 and the upper region heating pipe 5 are respectively installed on the heating pipe bracket 1 located on the left and right sides of the tank body;

[0008] The moving unit includes a lower lifting motor 2 and an upper lifting motor 4, which are respectively connected to the lower area heating pipe 3 and the upper area heating pipe 5;

[0009] The monitoring unit includes a temperature sensor 8 and a liquid level sensor 10, which are used to detect the temperature and liquid level of the asphalt in the storage tank body 13;

[0010] The control unit includes a PLC module 11 and a computer 12, which are used to control the lower area heating pipes 3 and the upper area heating pipes 5 to move up and down for heating.

[0011] Preferably, the heating pipe bracket 1 also includes a vertical slide rail and a horizontal bracket.

[0012] Preferably, the heating unit also includes a heat transfer oil inlet hose 6 and a heat transfer oil circulation pump 7; the lower area heating drain pipe 3 is connected to the heat transfer oil inlet hose 6 on the left, and the upper area heating drain pipe 5 is connected to the heat transfer oil inlet hose 6 on the right; the heat transfer oil circulation pump 7 is used to circulate the heat transfer oil.

[0013] Preferably, the lower lifting motor 2 is used to drive the lower area heating pipe 3 to be lifted and lowered, and the upper lifting motor 4 is used to drive the upper area heating pipe 5 to be lifted and lowered.

[0014] Preferably, the monitoring unit further includes a warning light 9; when the temperature of the asphalt in the storage tank body 13 reaches the requirement, the warning light 9 is yellow; when the temperature of the asphalt in the storage tank body 13 does not reach the requirement and is being heated, the warning light 9 is red.

[0015] Preferably, the PLC module 11 receives the temperature signal of the temperature sensor 8, and when the temperature signal reaches the requirement, the heating is stopped and the indicator light 9 turns yellow;

[0016] When the temperature signal does not meet the temperature requirement, the liquid level sensor 10 detects the height of the asphalt liquid level in the tank and sends it to the PLC module 11. When the liquid level is lower than the preset height, the PLC module 11 turns on the heat transfer oil circulation pump 7 connected to the lower area heating pipe 3, and controls the lower lifting motor 2 to move the lower area heating pipe 3 up and down for heating until the temperature reaches the requirement and the prompt light 9 turns from red to yellow; when the liquid level is higher than the preset height, the PLC module 11 turns on the two heat transfer oil circulation pumps 7 connected to the lower area heating pipe 3 and the upper area heating pipe 5 respectively, and controls the lower lifting motor 2 and the upper lifting motor 4 to move the lower area heating pipe 3 and the upper area heating pipe 5 up and down for heating until the temperature reaches the requirement.

[0017] The advantages and beneficial effects of the embodiments of the utility model are as follows: the utility model sets two heating pipe brackets on the left and right sides of the storage tank body, and the lower area heating pipes and the upper area heating pipes are installed on the two heating pipe brackets. The temperature and liquid level of the asphalt in the storage tank body are monitored by temperature sensors and liquid level sensors, and then the information is fed back to the PLC module and the computer. The PLC module controls the operation of the lower lifting motor and the upper lifting motor. The lower lifting motor and the upper lifting motor are connected to the lower area heating pipe and the upper area heating pipe, so that the two heating pipes can move up and down on the heating pipe brackets, making the heating process faster and more uniform, facilitating the control of the temperature of the asphalt in the storage tank body, and saving the energy consumption required for heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the advantages of the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of an energy-saving heating system for an asphalt storage tank based on PLC control provided by the utility model;

[0020] Figure 2 A system block diagram of an energy-saving heating system for an asphalt storage tank based on PLC control provided by the utility model.

[0021] in, Figure 1 1 indicates the heating pipe bracket, 2 indicates the lower lifting motor, 3 indicates the lower area heating pipe, 4 indicates the upper lifting motor, 5 indicates the upper area heating pipe, 6 indicates the heat transfer oil inlet hose, 7 indicates the heat transfer oil circulation pump, 8 indicates the temperature sensor, 9 indicates the warning light, 10 indicates the liquid level sensor, 11 indicates the PLC module, 12 indicates the computer, and 13 indicates the tank body. DETAILED DESCRIPTION

[0022] In order to further illustrate the scheme of the present invention, an energy-saving heating system for an asphalt storage tank based on PLC control proposed by the present invention, its specific implementation method, structure, characteristics and advantages are described in detail as follows in conjunction with the accompanying drawings.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0024] The following is a detailed description of a specific scheme of an energy-saving heating system for an asphalt storage tank based on PLC control provided by the utility model in conjunction with the accompanying drawings.

[0025] Example:

[0026] The main application scenarios of this utility model are the storage and heating of asphalt, please refer to Figure 1 , which shows a schematic diagram of an energy-saving heating system for an asphalt storage tank based on PLC control provided by an embodiment of the utility model. The utility model is an asphalt storage tank with flexible heating in different areas.

[0027] The system mainly includes: a storage unit, a heating unit, a moving unit, a monitoring unit and a control unit.

[0028] The storage unit storage includes a storage tank body 13 and a heating pipe bracket 1; the storage tank body 13 is a sealed structure, the heating pipe bracket 1 is located in the storage tank body 13, and there are two heating pipe brackets, which are located on the left and right sides of the storage tank body 13, and the heating pipe bracket includes a vertical slide rail and a horizontal bracket;

[0029] The heating unit includes a lower area heating pipe 3, an upper area heating pipe 5 and a heat transfer oil inlet hose 6, wherein the lower area heating pipe 3 and the upper area heating pipe 5 are respectively located on the left and right sides of the storage tank. Figure 1 As shown, the lower area heating pipe 3 is connected to the heat transfer oil inlet hose 6 on the left, and the upper area heating pipe 5 is connected to the heat transfer oil inlet hose 6 on the right, wherein the heat transfer oil inlet hose is made of a high temperature resistant and anti-aging hose, one side of which is connected to the heating pipe, and the other side is connected to the heat transfer oil pipeline. The purpose of using the hose is to facilitate the movement of the lower area heating pipe 3 and the upper area heating pipe 5 to prevent the input of the heat transfer oil from being affected during the movement; the lower area heating pipe 3 on the left is installed on the heating pipe bracket located on the left side of the storage tank body 13, and the upper area heating pipe 5 on the right is installed on the heating coil bracket located on the right side of the storage tank body 13; there is also a heat transfer oil circulation pump 7, wherein there are two heat transfer oil circulation pumps, which are respectively connected to the lower area heating pipe 3 and the upper area heating pipe 5 through the heat transfer oil inlet hose on the left and the heat transfer oil inlet hose on the right, for circulating the heat transfer oil;

[0030] The moving unit includes a lower lifting motor 2 and an upper lifting motor 4, which are connected to the lower heating pipe 3 and the upper heating pipe 5 respectively. The lower lifting motor 2 is used to drive the lower heating pipe 3 to move up and down, and the upper lifting motor 4 is used to drive the upper heating pipe 5 to move up and down.

[0031] The monitoring unit includes a temperature sensor 8, a liquid level sensor 10 and a warning light 9; the temperature sensor 8 is located inside the storage tank body 13 and is used to measure the temperature of the asphalt inside the storage tank body 13; the warning light 9 indicates the heating state of the asphalt inside the tank body, when the asphalt is heated, the warning light 9 is red, and when the asphalt temperature inside the storage tank body 13 reaches the requirement, the warning light 9 is yellow;

[0032] The control unit includes a PLC module 11 and a computer 12, wherein the first temperature sensor 8 and the second temperature sensor 14 transmit the temperature signal of the asphalt in the tank to the PLC module 11, the PLC module 11 transmits the temperature signal to the computer 12, and the computer 12 issues an instruction to control the lower part lifting motor 2 and the upper part lifting motor 3, thereby controlling the lower part lifting motor 2 and the upper part lifting motor 4, and controlling the lower area heating pipe 3 and the upper area heating pipe 5 to move up and down for heating; when the temperature reaches the set temperature, the temperature sensor 8 transmits a signal to the PLC module 11, the PLC module 11 transmits the signal to the computer 11, and the computer 11 issues an instruction to turn off the heat transfer oil circulation pump 7, and the prompt light 9 changes from red to yellow after the heating is completed;

[0033] At the same time, the liquid level sensor 10 transmits the liquid level of the asphalt in the tank to the PLC module 11 in real time to prevent the liquid level of the asphalt in the tank from reaching the height of the lower lifting motor 2 and the upper lifting motor 4; when the liquid level sensor 10 detects that the liquid level of the asphalt in the tank is lower than the preset height, only the lower area heating pipe 3 is started for up and down movement and heating; when the liquid level sensor 10 detects that the liquid level of the asphalt in the tank is lower than the preset height, the lower area heating pipe 3 and the upper area heating pipe 5 are started at the same time for heating. During heating, the heights of the lower area heating pipe 3 and the upper area heating pipe 5 need to be lower than the liquid level of the asphalt in the tank.

[0034] It should also be noted that although the lower area heating pipe 3 and the upper area heating pipe 5 have overlapping parts, they will not collide during the up and down movement due to the control of the set program.

[0035] The heating principle of the utility model is as follows: when the temperature signal transmitted by the temperature sensor 8 to the PLC module 11 does not meet the set requirements, the liquid level sensor 10 detects the height of the asphalt liquid level in the tank body and sends it to the PLC module 11. When the liquid level is lower than the preset height, the PLC module 11 turns on the heat transfer oil circulation pump 7 connected to the lower area heating pipe 3, and controls the lower part lifting motor 2 to make the lower area heating pipe 3 move up and down for heating until the temperature reaches the set temperature, and the prompt light 9 changes from red to yellow; when the liquid level is higher than the preset height, the PLC module 11 turns on the two heat transfer oil circulation pumps 7 connected to the lower area heating pipe 3 and the upper area heating pipe 5, respectively, and controls the lower part lifting motor 2 and the upper part lifting motor 4 to make the lower area heating pipe 3 and the upper area heating pipe 5 move up and down for heating until the temperature reaches the set temperature, and the prompt light 9 changes from red to yellow. Among them, the preset height needs to be determined by the implementer according to the actual situation of the tank body.

[0036] When the liquid level in the tank is lower than the preset threshold, only the heating pipes in the lower area need to be moved up and down for heating. At this time, a balance is achieved between the heating efficiency and energy consumption, which not only ensures the heating efficiency and heating balance, but also further reduces energy consumption.

[0037] It should be noted that the above-mentioned sequence of the embodiments of the utility model is only for description and does not represent the advantages and disadvantages of the embodiments. And the above describes a specific embodiment of this specification. The various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. The above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. An energy-saving heating system for asphalt storage tanks based on PLC control, characterized in that: The system comprises: a storage unit, a heating unit, a moving unit, a monitoring unit and a control unit; The storage unit comprises a storage tank body (13) and a heating pipe bracket (1), wherein there are two heating pipe brackets (1), which are respectively located on the left and right sides of the storage tank body; The heating unit comprises a lower region heating pipe (3) and an upper region heating pipe (5); the lower region heating pipe (3) and the upper region heating pipe (5) are respectively mounted on heating pipe brackets (1) located on the left and right sides of the storage tank body; The moving unit comprises a lower lifting motor (2) and an upper lifting motor (4), which are respectively connected to the lower region heating pipe (3) and the upper region heating pipe (5); The monitoring unit comprises a temperature sensor (8) and a liquid level sensor (10), which are used to detect the temperature and liquid level of the asphalt in the storage tank body (13); The control unit comprises a PLC module (11) and a computer (12), and is used to control the lower area heating pipes (3) and the upper area heating pipes (5) to move up and down for heating.

2. According to claim 1, an energy-saving heating system for asphalt storage tanks based on PLC control is characterized in that: The heating pipe bracket (1) also includes a vertical slide rail and a horizontal bracket.

3. According to the energy-saving heating system of an asphalt storage tank based on PLC control in claim 1, it is characterized in that: The heating unit further comprises a heat transfer oil inlet hose (6) and a heat transfer oil circulation pump (7); the lower area heating pipe (3) is connected to the heat transfer oil inlet hose (6) on the left, and the upper area heating pipe (5) is connected to the heat transfer oil inlet hose (6) on the right; the heat transfer oil circulation pump (7) is used to circulate the heat transfer oil.

4. According to the energy-saving heating system of an asphalt storage tank based on PLC control in claim 1, it is characterized in that: The lower part lifting motor (2) is used to drive the lower area heating pipe (3) to be lifted and lowered, and the upper part lifting motor (4) is used to drive the upper area heating pipe (5) to be lifted and lowered.

5. The energy-saving heating system for asphalt storage tanks based on PLC control according to claim 1 is characterized in that: The monitoring unit further comprises a warning light (9); when the temperature of the asphalt in the storage tank body (13) reaches the requirement, the warning light (9) is yellow; when the temperature of the asphalt in the storage tank body (13) does not reach the requirement and is being heated, the warning light (9) is red.

6. The energy-saving heating system for asphalt storage tanks based on PLC control according to claim 1 is characterized in that: The PLC module (11) receives a temperature signal from a temperature sensor (8), and when the temperature signal reaches a required level, heating is stopped and the indicator light (9) turns yellow; When the temperature signal does not meet the temperature requirement, the liquid level sensor (10) detects the height of the asphalt liquid level in the tank body and sends it to the PLC module (11); when the liquid level is lower than a preset height, the PLC module (11) turns on the heat transfer oil circulation pump (7) connected to the lower area heating pipe (3), and controls the lower part lifting motor (2) so that the lower area heating pipe (3) moves up and down for heating until the temperature reaches the requirement and the indicator light (9) changes from red to yellow; when the liquid level is higher than the preset height, the PLC module (11) turns on the two heat transfer oil circulation pumps (7) respectively connected to the lower area heating pipe (3) and the upper area heating pipe (5), and controls the lower part lifting motor (2) and the upper part lifting motor (4) so ​​that the lower area heating pipe (3) and the upper area heating pipe (5) move up and down for heating until the temperature reaches the requirement.

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