Pipeline electric heat tracing control device and method for ammonia area eyewash equipment

Abstract

The invention provides a pipeline electric heat tracing control device and method for an ammonia area eyewash device. The pipeline electric heat tracing control device comprises an electric heat tracing, a comprehensive control box and a temperature sensor. The electric heat tracing device is laid along the eyewash equipment pipeline so as to heat the eyewash equipment pipeline; the eyewash equipment pipeline is a pipeline for supplying water to the ammonia area eyewash equipment; the comprehensive control box is in communication connection with the temperature sensor and the electric heat tracing so as to control starting and stopping of the electric heat tracing based on the temperature of the eyewash equipment pipeline; the temperature sensor is used for acquiring the temperature of the eyewash equipment pipeline; the water temperature detection device is used for detecting the water temperature of the ammonia area eyewash equipment, preventing the water temperature from being too high or too low, detecting whether the electric heat tracing is fractured or not, dealing with fracture in time, avoiding ammonia gas explosion and improving operation safety.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas power generation, and in particular to a pipeline electric heating control device and method for an ammonia area eyewash. Background Art

[0002] Ammonia area eyewash is used for first aid treatment of chemical burns on the eyes. Chemical burns on the eyes are usually caused by chemicals entering the eyes, which may cause burns, irritation or chemical reactions to the eyes, and severe cases may cause permanent vision damage. After the burn occurs, the key to treatment is to quickly remove the chemicals to reduce damage. The ammonia area eyewash provides a way to quickly remove chemicals. After flushing the eyes with water, the corresponding neutralizer is used to quickly neutralize the chemicals to effectively reduce the symptoms of burns. In addition, the ammonia area eyewash is also convenient and easy to use, emergency rescue, and very convenient, allowing people to respond to chemical burns on the eyes more quickly and effectively and provide first aid to patients. In winter, in order to reduce irritation, electric heating is usually set on the eyewash to heat the pipes. However, since electric heating is used all year round, the temperature is too high in summer, causing the water temperature to be too high, scalding the skin, and the electric heating cable may break during use. If the power continues to be supplied when the electric heating cable breaks, electric sparks may be generated at the break, and there is a risk of ammonia explosion.

[0003] In view of this, the present invention provides a pipeline electric heating control device and method for an ammonia area eyewash, so as to detect the water temperature of the ammonia area eyewash to avoid the water temperature being too high or too low, and detect whether the electric heating is broken, so as to respond to the occurrence of the break in time, avoid ammonia explosion, and improve operation safety. Summary of the invention

[0004] The object of the present invention is to provide a pipeline electric heating control device for an ammonia area eyewash, comprising electric heating, an integrated control box and a temperature sensor; the electric heating is laid along the eyewash pipeline to heat the eyewash pipeline; the eyewash pipeline refers to a pipeline that supplies water to the ammonia area eyewash; the integrated control box is communicatively connected with the temperature sensor and the electric heating to control the start and stop of the electric heating based on the temperature of the eyewash pipeline; the temperature sensor is used to obtain the temperature of the eyewash pipeline.

[0005] Furthermore, there are a plurality of temperature sensors, which are attached at intervals on the outer wall of the eyewash pipe and are used to detect the real-time temperature at different positions of the eyewash pipe.

[0006] Furthermore, heat-insulating materials are evenly arranged outside the eyewash pipe.

[0007] Furthermore, the integrated control box includes a PLC, which is connected to the temperature sensor and is used to receive a temperature signal fed back by the temperature sensor and send a control signal to control the start and stop of the electric heating.

[0008] Furthermore, the integrated control box also includes a circuit breaker, a control relay and a junction box; the multiple circuit breakers are respectively connected to the power supply; one end of the multiple control relays is connected to the corresponding circuit breaker, and the other end is connected to the PLC to receive the control signal sent by the PLC; one end of the multiple junction boxes is connected to the corresponding control relay, and the other end is connected to the corresponding electric heating to transmit electrical energy to the electric heating.

[0009] Furthermore, it also includes a touch screen; the touch screen is connected to the PLC to display the temperature value of the eyewash pipe in real time.

[0010] Furthermore, it also includes a preset temperature setter; the preset temperature setter is used to set a preset temperature range of the eyewash pipe and send it to the PLC; the PLC controls the on and off of the relay based on the preset temperature range to start and stop the electric heating.

[0011] Furthermore, it also includes a leakage monitor; the leakage monitor is connected to the PLC, and when a leakage current is detected, the PLC controls the relay to disconnect.

[0012] The present invention also aims to provide a method for controlling electric heating of an eyewash pipe in an ammonia area, comprising: obtaining the temperature of the eyewash pipe; determining whether the temperature is within a preset temperature range; if the temperature exceeds the preset temperature range, stopping supplying power to the electric heating; if the temperature is lower than the preset temperature range, supplying power to the electric heating; if the temperature is within the preset temperature range, performing no operation.

[0013] Furthermore, if the electric heat trace is broken, the power supply to the electric heat trace is stopped.

[0014] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0015] By setting up temperature sensors and PLC controllers, the functions of autonomous alarm, self-monitoring and equipment linkage are realized, which to a certain extent realizes the intelligent temperature control and explosion-proof, and reduces the cost of manual operation.

[0016] By laying electric heating tape on the pipeline, the anti-freeze and heat preservation functions of the pipeline are improved.

[0017] Safety is improved by adding a leakage protector to the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exemplary schematic diagram of a pipeline electric heating control device for an ammonia area eyewash provided by some embodiments of the present invention;

[0019] Figure 2 An exemplary flow chart of a method for controlling the electric heating of pipes of an ammonia area eyewash station according to some embodiments of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Figure 1 An exemplary schematic diagram of a pipe electric heating control device for an ammonia area eyewash provided in some embodiments of the present invention. Figure 1 As shown, the pipe electric heating control device of the ammonia area eyewash station may include electric heating, an integrated control box and a temperature sensor.

[0022] The electric heating is laid along the eyewash pipe to heat the eyewash pipe; the eyewash pipe refers to the pipe that supplies water to the eyewash in the ammonia area. The electric heating can be an electric heating tape.

[0023] In some embodiments, thermal insulation material is evenly arranged outside the eyewash pipe to isolate the pipe from the external environment and reduce heat loss.

[0024] The integrated control box is connected to the temperature sensor and the electric heat tracing to control the start and stop of the electric heat tracing based on the temperature of the eyewash pipe. The integrated control box can be arranged beside the pipeline.

[0025] In some embodiments, the integrated control box includes a PLC, which is connected to the temperature sensor and is used to receive a temperature signal fed back by the temperature sensor and send a control signal to control the start and stop of the electric heating.

[0026] In some embodiments, the integrated control box further includes a circuit breaker, a control relay and a junction box.

[0027] The multiple circuit breakers are respectively connected to the power supply; one end of the multiple control relays is connected to the corresponding circuit breaker, and the other end is connected to the PLC to receive the control signal sent by the PLC; one end of the multiple junction boxes is connected to the corresponding control relay, and the other end is connected to the corresponding electric heating to transmit electrical energy to the electric heating.

[0028] The temperature sensor is used to obtain the temperature of the eyewash pipe.

[0029] In some embodiments, there are multiple temperature sensors, which are attached to the outer wall of the eyewash pipe at intervals to detect the real-time temperature at different positions of the eyewash pipe. The temperature sensors are not in contact with the electric heat trace.

[0030] In some embodiments, the integrated control box and electric heating etc. are explosion-proof equipment.

[0031] In some embodiments, a touch screen is further included; the touch screen is connected to the PLC to display the temperature value of the eyewash pipe in real time.

[0032] In some embodiments, a preset temperature setting device is further included; the preset temperature setting device is used to set a preset temperature range of the eyewash pipe and send it to the PLC; the PLC controls the on and off of the relay based on the preset temperature range to start and stop the electric heating. In some embodiments, the preset temperature setting device can be implemented through a touch screen.

[0033] In some embodiments, a leakage monitor is also included; the leakage monitor is connected to the PLC, and when a leakage current is detected, the PLC controls the relay to disconnect. For example, when the electric heating cable breaks, discharge will occur, and the generated leakage current will cause the circuit breaker to disconnect to ensure safety.

[0034] Figure 2 An exemplary flow chart of a method for controlling the electric heating of a pipe in an ammonia area eyewash station according to some embodiments of the present invention. Figure 2 As shown, the pipe electric heating control method for the ammonia area eyewash station can include the following:

[0035] S1: Get the temperature of the eyewash pipe.

[0036] In some embodiments, the temperature of the eyewash pipe can be obtained by a temperature sensor. For example, temperature sensors can be arranged at intervals along the outer wall of the eyewash pipe, and the temperatures at multiple locations can be obtained by temperature sensors at multiple locations.

[0037] In some embodiments, determining a location of the temperature sensor on the eyewash pipe includes:

[0038] Determine the starting point and the end point of the electric heating, and respectively set temperature sensors on the outer wall of the eyewash pipe at the starting point and the end point of the electric heating;

[0039] Obtain the temperature values ​​of multiple points on the outer wall of a portion of the eyewash pipe at multiple times and the outlet water temperature of the eyewash at that time; the portion of the eyewash pipe refers to the portion of the eyewash pipe installed with electric heating;

[0040] Based on the correlation between the temperature values ​​of multiple points on the outer wall of the eyewash pipe and the outlet water temperature value, multiple points on the eyewash pipe where the temperature sensors are installed are determined; wherein the formula for determining the multiple points on the eyewash pipe where the temperature sensors are installed is:

[0041]

[0042] Among them, R represents the temperature value x at a certain point in the eyewash pipe i Correlation with the outlet water temperature value y; x i Indicates the temperature value of the eyewash pipe where the temperature sensor is to be set. i is the position variable, x i ∈0 represents the temperature value at this position when no electric heating is performed, x i ∈1 indicates the temperature value at the position when electric heating is performed; y indicates the outlet water temperature value, y∈0 indicates the temperature value at the outlet when no electric heating is performed, and y∈1 indicates the temperature value at the outlet when electric heating is performed; E[*] indicates the expected value; n indicates the total number of moments; Represents x i The mathematical expectation of y represents the mathematical expectation of y.

[0043] The positions of the temperature sensors to be set whose correlation is greater than the set value are used as the positions to set the temperature sensors, or the correlations are sorted from high to low, and the positions of the temperature sensors to be set with a preset number of top rankings are used as the positions to set the temperature sensors.

[0044] S2: Determine whether the temperature is within a preset temperature range.

[0045] The preset temperature range may refer to a preset temperature range of the eyewash pipe. Within the preset temperature range, the water temperature of the eyewash pipe is suitable for showering. In some embodiments, the preset temperature range may be set by a preset temperature setter. For example, the preset temperature setter may be a touch screen, and a suitable temperature range may be input through the touch screen.

[0046] S3: If the temperature exceeds the preset temperature range, stop supplying power to the electric heating.

[0047] S4: If the temperature is lower than the preset temperature range, supply power to the electric heating.

[0048] If the temperature is within the preset temperature range, no operation is performed.

[0049] In some embodiments, the method further comprises stopping supplying power to the electric heat trace if the electric heat trace is broken.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pipeline electric heating control device for an ammonia area eyewash, characterized in that: Includes electric heat tracing, integrated control box and temperature sensor; The electric heat tracing is laid along the eyewash pipe to heat the eyewash pipe; the eyewash pipe refers to the pipe supplying water to the eyewash in the ammonia area; The integrated control box is in communication with the temperature sensor and the electric heat tracing to control the start and stop of the electric heat tracing based on the temperature of the eyewash pipe; The temperature sensor is used to obtain the temperature of the eyewash pipe.

2. The pipeline electric heating control device for the ammonia area eyewash according to claim 1 is characterized in that: There are a plurality of temperature sensors, which are attached at intervals on the outer wall of the eyewash pipe and are used to detect the real-time temperature at different positions of the eyewash pipe.

3. The pipeline electric heating control device for the ammonia area eyewash according to claim 1 is characterized in that: The outside of the eyewash pipe is evenly provided with heat-insulating materials.

4. The pipeline electric heating control device for the ammonia area eyewash according to claim 1 is characterized in that: The integrated control box includes a PLC, which is connected to the temperature sensor and is used to receive a temperature signal fed back by the temperature sensor and send a control signal to control the start and stop of the electric heating.

5. The pipeline electric heating control device for the ammonia area eyewash according to claim 4 is characterized in that: The integrated control box also includes a circuit breaker, a control relay and a junction box; The plurality of circuit breakers are respectively connected to a power source; One end of the plurality of control relays is connected to the corresponding circuit breaker, and the other end is connected to the PLC to receive a control signal sent by the PLC; One end of the plurality of junction boxes is connected to the corresponding control relay, and the other end is connected to the corresponding electric heat tracing to transmit electrical energy to the electric heat tracing.

6. The pipeline electric heating control device for the ammonia area eyewash according to claim 4 is characterized in that: Also includes a touch screen; The touch screen is connected to the PLC to display the temperature value of the eyewash pipe in real time.

7. The pipeline electric heating control device for the ammonia area eyewash according to claim 5 is characterized in that: Also included is a preset temperature setter; The preset temperature setter is used to set the preset temperature range of the eyewash pipe and send it to the PLC; The PLC controls the on and off of the relay based on the preset temperature range to start and stop the electric heating.

8. The pipeline electric heating control device for the ammonia area eyewash according to claim 4 is characterized in that: Also includes leakage monitor; The leakage monitor is connected to the PLC, and when leakage current is detected, the PLC controls the relay to disconnect.

9. A method for controlling electric heating of pipelines of an ammonia area eyewash station, characterized in that: include: Get the temperature of the eyewash pipe; Determining whether the temperature is within a preset temperature range; If the temperature exceeds the preset temperature range, the power supply to the electric heating is stopped; If the temperature is lower than the preset temperature range, supplying power to the electric heating; If the temperature is within the preset temperature range, no operation is performed.

10. The pipeline electric heating control method of the ammonia area eyewash according to claim 9 is characterized in that: The method also includes stopping supplying power to the electric heat tracing if the electric heat tracing is broken.

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