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(Knowledge popularization) What are the preliminary preparations for installing an X-ray machine?

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Update time : 2023-09-20 11:28:00
Before installing the X-ray machine, preparation work is very important. If the installation workflow cannot be worked out skillfully, quickly and standardizedly before the X-ray machine is installed, and there is a lack of a comprehensive and systematic design concept, it will be a problem for future installation work. , the actual operation brings a lot of inconvenience, Yueshen Medical specially summarizes several preliminary preparations for installing the X-ray machine for you.

1. Grounding problem
Grounding is a very important task for the installation and use of X-ray machines. It has two specific meanings. On the one hand, it is safety grounding, which is mainly for the personal safety of staff and patients. On the other hand, the working ground is used to find the discharge point or circuit measurement reference point for each circuit.
The success or failure of grounding work is one of the key issues related to the safety of personnel and the normal use of machines. Grounding is measured by the grounding resistance value and must be regularly inspected by functional departments. The value must be within the specified range and cannot exceed the upper limit.
Generally, the grounding point resistance of ordinary X-ray machines is ≤3 ohms, and special-purpose machines such as vascular subtraction (DSA) require ≤1 ohms. The production method is: if the pit is dug at a depth of (1.5~2) meters from the ground according to the conventional method, the pit area will be (1~1.5) square meters, and the cost of laying a copper plate of a certain thickness at the bottom of the pit will be very high, and the contacts of the leads will be very expensive. Only one, unstable. In actual practice, three galvanized pipes (diameter 50 mm, length 2500 mm) can be used. Each galvanized pipe is 3 meters apart and smashed into the ground. The head of the galvanized pipe is 300~500 mm away from the ground. Each pipe is flattened. The irons are connected together, and a grounding wire is welded to each galvanized pipe and connected to the terminal of the grounding wire. The machine's ground wire is also connected to this terminal. This method can meet the machine requirements, has low cost, is easy to operate, and has high stability. It should be the preferred method in work.
2. Power supply problem
According to the different requirements of the machine on the internal resistance of the power supply, the instantaneous power of the machine and the distance from the power transformer are mainly considered to determine the wire diameter (mainly copper core wire) of the machine's power cord.
Generally, the diameter of the power cord (copper core) of ordinary photographic X-ray machines and gastrointestinal X-ray machines is 30 square millimeters, and the diameter of the power cord of more special machines such as SA and CT is preferably 50 square millimeters. The power cord must be in a three-phase five-wire format (three phase wires, one neutral wire, and one ground wire) or a three-phase four-wire format (three phase wires, one neutral wire, and another ground wire). Pay attention to the wiring of the phase wires. Phase sequence arrangement. The power control box is placed in the control room where it is convenient to open and close.
3. Room design
Room design includes the design of the machine room and control room. Comprehensive consideration and reasonable design based on machine model, performance, work convenience, radiation protection and other requirements are also important preliminary preparations. Because the X-ray machine is a special machine, the X-rays generated will cause certain radiation damage to the human body. Therefore, the protection of workers is a very important task and must be paid great attention to. Under the premise of ensuring that the protection of staff and working environment meets national standards, other aspects such as the rationality of room layout and work convenience should be considered.
First determine the position of the machine center point in the room based on the machine performance. In addition, the room height refers to the actual height of the room ceiling from the ground (net height after decoration), which must meet the maximum distance requirements for machine operation to avoid affecting operation. The design of the observation window (commonly known as lead glass) requires lead glass with a certain lead equivalent radiation protection, located at the horizontal center of the wall, with the lower edge of the glass at an actual distance (800~850) mm from the ground.
The wall holes in the computer room and control room must be preset for the cables connecting the console, control cabinet, and bed. Generally, the holes are determined by considering the frequency of the machine, whether it is industrial frequency, medium frequency, high frequency, and the configuration of the power supply voltage regulator. The size of the wall hole is generally square or circular, 200 mm × 200 mm in size, 100 mm from the ground, and the number is 1 to 2.
If a new computer room is built, an underground cable trench should be reserved. The size of the cable tray will be determined based on the machine model and the number of cables (it must be used overhead). The design of the room door consists of the machine room door and the machine room control room door. This door requires special treatment, emphasizing protective performance and easy opening. It is recommended that the shape of the machine room door be a double door and a double door.
In short, the installation of machines is a comprehensive project. It is necessary to take the overall situation into consideration, not to be impatient, but to implement it step by step and according to the plan, so as to create favorable conditions for the smooth installation of the machine.
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