Liquid injection apparatus for use in a method of lining the internal surface of a pipe

A liquid injection apparatus for use in a method of lining an internal surface of a pipe, which method including using the liquid injection apparatus to introduce a necessary amount of resin into the pipe through an open end thereof and to cause the resin to move until the front end of the resin reaches an inner end of the pipe, and sucking the resin back from the inner end so as to line the internal surface of the pipe with the resin, said liquid injection apparatus comprising:

• a push car having a frame structure;
• a liquid tank for storing a necessary amount of liquid to be injected into the pipe;
• a liquid pump for pumping the necessary amount of liquid so as to inject the liquid into the pipe:
• and
• a liquid injection controlling device for controlling the pressure of the liquid being supplied through the liquid pump, stopping the liquid injection after a predetermined amount of liquid has been injected into the pipe, and stopping the liquid injection if the liquid pressure in the pipe changes beyond a predetermined range;
• wherein the liquid tank, the liquid pump and the liquid injection controlling device are installed together in the push car so as to be easily movable.