Maintenance of water coolers 

● Water cooler is a device placed in the cooling water circuit to control the temperature of lubricating oil by utilizing the temperature of cooling water.

● Its heat transfer tube adopts purple copper tube rolled out with heat dissipation fins, which can make two liquid mediums with a certain temperature difference realize heat exchange, so as to achieve the purpose of lowering the oil temperature and ensuring the normal operation of the equipment.

● Cooler long-term work, the cooler tube surface will accumulate scale and increase the thermal resistance and flow resistance, so that the heat transfer performance gradually reduced, so as not to ensure that the cooler requirements.

Obviously, the focus of maintenance should be placed on the dirt cleaning, here are several cleaning methods for reference:

Method 1: the use of electric pipe cleaning tool, that is, driven by an electric motor for rotary movement of a flexible shaft, the end of the shaft set of nylon brush or steel wire brush for rotary scrubbing, and through a non-leakage cover to the water injected into the shaft around, in order to scrub out the loose dirt in a timely manner.

Method 2: with a round tube, one end of the welded and tube inner diameter similar to the wire brush while rotating while advancing, dirt can be deposited in the inner lumen of the tube, will not produce dirt thicker and thicker to make advancing more difficult, this method is more often used, but labor-intensive.

Method 3: the use of high-pressure pumps (pressure 10 ~ 20Mpa) spray high-pressure water for flushing, the effect is better, mainly used for cleaning between the tube.

Method 4: the use of sponge ball on the heat exchanger tube for automatic cleaning. According to different layers of scale with different hardness of the sponge ball, for special hard scale, can be used with a "band" of emery sponge ball. Its role is to use the softer and elastic sponge ball into the heat exchanger tube, sponge ball compression and tube walls are in contact with the ball and the tube wall to produce relative motion, constantly friction tube wall, will be removed from the deposits.

Method 5: Often replace the cooling water, because the water use will produce scale, grease scale, rust scale, which is also a reason for the clogging of the copper pipe. Disassemble the front and rear cover, use the air gun to blow each hole of the copper pipe, blow out the dirt, and then install the front and rear cover, O ring if there is damage replacement.

 水冷却器的维护 

● Most cooler failures are caused by cooler tubes.

● Due to corrosion, vapor erosion, wear and tear of the tube wall thinning and perforation, but also due to thermal expansion and contraction, vibration generated by the fluid movement caused by the joints and other sexual damage. After the cooler tube is broken, the two media will seep into each other and should be repaired in time, there are the following methods for reference:

Method 1: find out the broken cooler tube, with the tube plug to plug both ends. The taper of the tube plug is between 3~5 degrees, the hardness of the tube plug material should be lower or equal to the hardness of the tube, and the total number of plugged tubes shall not exceed 10% of the total number.

Method 2: Remove the broken tube and replace it with a new one for reexpansion.

Method 3: Leakage at the connection between tube end and tube plate should be reexpanded. If corrosion is severe, the tube bundle should be replaced.

Method 4: The cooler out of service in winter should be drained of the medium in the chamber to prevent freezing and cracking the cooler.