A pressure tank having a reinforced stainless steel connector that can bear heavy weight and the stainless steel connector makes the pressure tank well water-tightened. The pressure tank mainly contains: an upper chamber, an inner chamber, a sealing washer, a stainless steel connector, a leakproof ring, an elastic diaphragm, a stainless steel ring washer and a lower chamber. The upper chamber has a hole on top thereof. The upper chamber encloses the inner chamber. The inner chamber has an inward protrusion on top thereof. The inward protrusion has a through hole aligned with the hole of the upper chamber and a recession around the through thereof. The sealing washer is installed between the upper chamber and the inner chamber. The sealing washer has a through hole aligned with the through hole of the inner chamber. The stainless steel connector is engaged through the hole of the upper chamber, the through hole of the sealing washer, and the through hole of the inner chamber in order. The leakproof ring is placed around a joint of the inward protrusion and the stainless steel connector and received in the recession of the protrusion. The elastic diaphragm is mounted on an inner side of the inner chamber and defines the upper chamber and a lower chamber. The lower chamber has an inlet for inputting air thereto. Wherein a bottom of the stainless steel connector is riveted to press against the stainless steel ring washer to hold the leakproof ring firmly and secure the inner chamber to the upper chamber.
1. A pressure tank comprising:
an upper chamber having a hole on top thereof;
an inner chamber enclosed by said upper chamber said inner chamber having an inward protrusion on top thereof, said inward protrusion having a through hole aligned with said hole of said upper chamber and a recession around said through hole thereof and open communication therewith;
a sealing washer installed between and in contact with said upper chamber and said inner chamber, said sealing washer having a through hole aligned with said through hole of said inner chamber and said hole of said upper chamber;
a stainless steel fluid connector engaged through said hole of said upper chamber, said through hole of said sealing washer, and said through hole of said inner chamber in order;
a leakproof ring placed around a joint of said inward protrusion and said stainless steel fluid connector, said leakproof ring being received in said recession of said inward protrusion;
a stainless steel ring washer surrounding said stainless steel fluid connector and overlaying said leakproof ring;
an elastic diaphragm mounted on an inner side of said inner chamber and defining said upper chamber and a lower chamber, said lower chamber having an inlet for inputting air thereto;
wherein a bottom of said stainless steel fluid connector being riveted to press against said stainless steel ring washer to hold said leakproof ring firmly and secure said inner chamber and said sealing washer to said upper chamber.
2. The pressure tank as claimed in claim 1 , wherein said stainless steel fluid connector includes a threaded section, a soldering section, and an engaging section, said threaded section of said stainless steel fluid connector being connected to a water pipe, said soldering section of said stainless steel fluid connector being mounted on a lower portion of the said threaded section of the said stainless steel fluid connector, and has a cylindrical shape and an annular recess formed therein so that said soldering section of said stainless steel fluid connector may be soldered on said tank body rapidly, said engaging section being engaged through said hole of said upper chamber, said through hole of said sealing washer, and said through hole of said inner chamber in order.
3. The pressure tank as claimed in claim 2 wherein said engaging section having a thicker portion and a thinner portion, said thinner portion being formed below and connected to said thicker portion for being riveted to press said stainless steel ring washer to hold said leakproof ring firmly.
4. The pressure tank as claimed in claim 3 further comprising a securing ring for securing a bottom periphery of said inner chamber to said upper chamber.
5. The pressure tank as claimed in claim 4 wherein said elastic diaphragm having a reinforced area for resisting a pressure ejected from said inlet of said lower chamber.
6. The pressure tank as claimed in claim 5 wherein said reinforced area of said elastic diaphragm contains plural reinforcing bumps thereon, said reinforced area being thicker than other areas thereof.