High frequency machine is the preferred equipment for plastic heat sealing. It uses high-frequency electric field to make molecules inside the plastic vibrate to generate heat energy and fuse various products. It is mainly used for plastic welding, welding, bronzing, etc. It is mainly used for various PVC TPUs. Now let's know the precautions for using electronic tubes in the high frequency machine and what are the anti-interference skills?
1、 Precautions for the use of electronic tubes in high cycle machines
The working voltage range of the electronic tube can reach hundreds of volts to more than 50KV. Such high voltage is fatal. Therefore, in the process of designing the instrument, all high-voltage lines or connectors are wrapped with safe peripheral objects, and interlock switches are set at the door of the primary coil. In addition, when opening the door, it is also required to provide a function, that is, a capacitor that releases high-voltage electricity. When the inlet is open, the electronic tube must not be used. The circuit does not allow the inlet interlock to be shunted. You must always remember that high-voltage electricity will cause fatal electric shock.
X-ray radiation; Use electronic tubes at 15KV or higher. If you send an electron tube, it will produce harmful x-rays. In this case, appropriate x-ray shielding must be provided. If you have any questions about providing x-ray shielding, please consult an x-ray protection expert. The device user shall not attempt to move or change the x-ray protective shield.
Glass explosion; Some high cycle glass made of high cycle glass cover or other parts of the ceramic. Therefore, the explosion caused by the destruction of these fragile substances may produce a large number of glass fragments. The larger the tube, the greater the damage. Therefore, when using electronic tubes with glass or ceramics, it is recommended to use eye masks, face masks, leather gloves or thick cloth gloves.
Surface overheating; The electronic tube of the high frequency machine will be very hot during use. Even if the tube is used up, it will last for a period of time. To prevent burns, do not touch electronic tubes or related parts until they have cooled sufficiently. In addition, if any flammable substance is placed in the accessories of the electronic tube, it may cause a fire.
2、 Techniques to Prevent Interference Caused by High Frequency Wave Machines
When building the plant, do a good job of system shielding. Use 0.3 galvanized sheet or small mesh wire mesh to shield the surrounding area. Drive 50mm iron pipes into the ground for 2-3 meters, and make one every two meters to connect the shielding mesh and the iron pipe. In this way, high-frequency signals are not easily radiated from the plant and play the role of overall shielding.
The high-frequency frame and shell shall be well grounded to strengthen the shielding of the body and reduce the body radiation. It is recommended that the width be 50mm × The angle iron with a length of more than 50mm and no less than 2m shall be driven into the ground as the grounding body, and then the high-frequency frame shall be connected with the shell and the grounding body with copper wire with an area of more than 10mm square. The connection shall be as short as possible, without looping, and turning shall be avoided as far as possible, so as to strengthen the shielding of the fuselage and reduce the intensity of the interference signal radiated outward. If there are multiple high-frequency machines in the car (room), try to bury a ground wire beside each machine (or two adjacent machines).
Adjust the position and direction. If there are cables hanging on the exterior wall of the house, try to set the high-frequency wave machine at the end far away from the cables. In addition, the electronic tube of the high frequency machine will be very hot during use. Even if the tube is used up, it will last for a period of time. To prevent burns, do not touch electronic tubes or related parts until they have cooled sufficiently. In addition, if any flammable substance is placed in the accessories of the electronic tube, it may cause a fire. The electronic tube case of the high frequency machine has two right angle directions, that is, the galvanized iron plate is fixed on the shield on the galvanized angle iron frame. The radiation is weak, and it should face the cable or nearby TV users.
Amplifiers and steel strands near the high frequency machine must be reliably grounded to enhance their shielding capacity. When the cable is hung on the external wall of the high-frequency machine room, the reinforced concrete components (such as ring beam and cement Duoye floor) should be selected for external testing, and the external side of the brick wall should not be selected, so the cable radiation is weak.
Adjust the position of the amplifier or cable. When the inlet cable of the amplifier is close to the high-frequency machine (within 10m), the amplifier can move forward and the outlet cable is close to the high-frequency machine. Because the TV signal level here is high, it is conducive to increasing the level difference between the TV signal and the intrusion interference, or adjusting the trunk cable to keep it away from the high-frequency machine.
Ensure that the cable joints are reliable. The connection between amplifiers shall adopt direct connector as far as possible. The joints of ordinary lines shall be standardized and reliable, and special attention shall be paid to the waterproof of the joints to prevent water from entering the joints and causing mildew of the outer conductor braided mesh, resulting in poor shielding and series connection of interference signals.
Thank you for your patient reading. The above is an introduction to the precautions and anti-interference techniques for the use of electronic tubes in the high-frequency machine. Part of the content comes from the network and is only for reference. If you want to know more about the high frequency machine, please call us for details, and we will serve you wholeheartedly.
