During the operation of the steam turbine, due to the long-term influence of harsh environments such as high temperature and high pressure, bolts and other connecting parts are prone to loosening or damage due to thermal expansion and contraction, stress relaxation, etc., thus affecting the sealing and operating efficiency of the steam turbine. In order to solve this problem, professional technicians usually use bolt heating rods for heating. Among them, the steam turbine bolt heating rod DJ-15 has become a trusted choice for many industrial users with its high efficiency, safety and convenience.

The steam turbine bolt heating rod DJ-15 is a tool specially designed for heating steam turbine bolts. It uses the principle of resistance heating to heat the bolts through the heat generated by the current passing through the resistance wire, so that the bolts expand and elongate due to heat, thereby facilitating the tightening or removal of the bolts. The heating rod has the characteristics of simple structure, easy use, high power and long service life. It is widely used in the maintenance process of steam turbines in the power, chemical and other industries, especially when large-diameter stud bolts need to be hot-tightened or removed, and it shows excellent performance.

The steam turbine bolt heater DJ-15 is equipped with a heat-resistant insulating handle and is made of high-temperature and durable materials to ensure that operators can use it safely in high-temperature environments. Here we will learn about the detailed usage of this heating rod.

I. Preparation

1. Check the equipment: Before use, the heating rod should be carefully checked to ensure that its appearance is not damaged, the insulation layer is intact, and the resistance wire is not exposed or broken. At the same time, check whether the power cord and plug are intact to avoid safety hazards.

2. Prepare the power supply: According to the rated voltage requirements of the heating rod, prepare the corresponding AC or DC power supply, and ensure that the power supply voltage is stable. Before use, the power supply voltage should be measured with a voltmeter to ensure that it meets the requirements of the heating rod.

3. Select the heating rod: According to the diameter of the bolt and the required heating temperature, select the appropriate heating rod model and specification. Generally speaking, the larger the bolt diameter, the greater the power and length of the required heating rod.

II. Operation steps

1. Connect the power supply: Insert the power plug of the heating rod into the power socket and ensure that the connection is firm and reliable. When connecting the power supply, pay attention to the direction of the power cord to avoid tripping or pulling and causing damage to the power cord.

2. Adjust the temperature: If the heating rod is equipped with an intelligent temperature control system, the target temperature can be set through the operation panel or knob. If there is no intelligent temperature control system, it is necessary to adjust the heating time and current size according to experience or the instructions of the heating rod to control the heating temperature.

3. Insert the bolt hole: Insert the heating rod into the bolt hole that needs to be heated, and ensure that the heating part of the heating rod is in close contact with the bolt bare rod part. During the insertion process, care should be taken to avoid sparks or damage caused by friction between the heating rod and the bolt hole wall.

4. Start heating: Turn on the power switch, the heating rod starts to work, and heats the bolt. During the heating process, the working state and temperature changes of the heating rod should be closely observed to ensure uniform heating and avoid local overheating that causes damage to the bolt. At the same time, attention should be paid to the elongation of the bolt. When the bolt reaches the expected elongation, the power switch should be turned off immediately.

5. Bolt cooling: After heating is completed, turn off the power switch and wait for the bolt to cool naturally. During the cooling process, operations such as knocking or vibrating the bolt should be avoided to avoid affecting the initial stress and sealing of the bolt. The cooling time depends on the material and size of the bolt, which is generally about a few minutes.

6. Bolt tightening or disassembly: When the bolt cools to room temperature, it can be tightened or disassembled as needed. During the tightening process, appropriate tools should be used to apply appropriate torque to ensure that the bolt reaches the required initial stress. During the disassembly process, special disassembly tools or wrenches should be used to avoid damage to the bolts or connecting parts.

III. Precautions

1. Safety protection: During the operation, the operator should wear appropriate protective equipment, such as insulating gloves, protective glasses, protective clothing, etc. to prevent the risk of electric shock or burns. At the same time, the working area should be well ventilated to avoid the accumulation of harmful gases or steam.

2. Heating time: The heating time should be adjusted according to the diameter, material and required temperature of the bolt. Too long heating time may cause the bolt to overheat, deform or damage; too short heating time may cause insufficient bolt temperature, insufficient elongation or insufficient initial stress. Therefore, during the heating process, the elongation and temperature changes of the bolt should be closely monitored, and the heating time and current should be adjusted in time.

3. Regular inspection: Regular inspection and maintenance of the heating rod is the key to ensure its normal operation and extend its service life. Before and after use, the appearance of the heating rod should be inspected to ensure that it is not damaged, deformed, or exposed. At the same time, the resistance value of the heating rod should be measured and calibrated regularly to ensure its heating efficiency and accuracy. In addition, the power cord and plug should be inspected and maintained regularly to ensure that their connection is firm and reliable, without damage or aging.

4. Storage requirements: After use, the heating rod should be properly stored in a dry, ventilated, non-corrosive gas environment. Avoid exposing it to a humid, high temperature or direct sunlight environment to avoid damaging the heating rod or affecting its service life. At the same time, the heating rod should be stored separately from the power cord and plug to avoid damage caused by entanglement or extrusion.

The turbine bolt heater DJ-15 plays an important role in turbine maintenance with its high efficiency, safety and convenience. By properly using and maintaining the heating rod, the bolt heating task can be successfully completed, the reliability and stability of the turbine can be improved, and a strong guarantee can be provided for the smooth progress of industrial production.

When looking for high-quality, reliable steam turbine bolt heaters, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:

E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229