DEVICES FOR INJECTING ANTISEPTIC SOLUTION INTO WATER PIPE AND SMALL WATER SUPPLY SYSTEM

To provide a ball vibration type chemical injection device by which chemicals are injected without power, and which automatically controls injection quantity and injection time of the chemicals, enables the chemicals to be injected in the state that the chemicals are divided into a micro-size and finely controls injection rate, supplementation rate and injection quantity of the chemicals, and a simple waterworks facility comprising the ball vibration type chemical injection device. In a chemical injection device for simple waterworks capable of supplying chemicals without power, the ball vibration type chemical injection device comprises: a float(11) which is lifted and lowered along a guide erected on the bottom of a chemical tank with being interlocked with a level height of the chemicals, and on a central part of which a connection part(29) is formed; a connection member(12) which is assembled into the connection part of the float such that the connection member is capable of being disassembled from the connection part, from the wall surface of which a projection having fixed thickness is projected toward the inner center of the connection member such that a hole is formed in a central part of the connection member, and in which an air passage(16) is connected with the inner surface of a lower part of the connection member that is divided by the projection; a lower adjusting member(13) which is inserted onto the lower inner surface of the connection member to form an air-liquid mixing chamber connected with the air passage, and through which a chemical suction passage(24) is formed; an air tube(17) which is inserted into the air inflow side of the air passage, and at the middle of which an air supply amount control valve(18) is installed; an upper adjusting member(15) which is inserted onto the upper inner surface of the connection member divided by the projection to form a chemical milling chamber, and through which a chemical discharge passage(25) is formed; a vibration ball(14) installed inside the chemical milling chamber; and a chemical injection tube(19) inserted into the discharge side of the chemical discharge passage.