Hydraulic pressure relief depressurization valve assembly for quick coupling

A hydraulic pressure relief depressurization valve assembly for quick coupling comprising a directional fluid body (10) which has grooves in its outer portion enabling an arrangement of sealing elements (11 and 12) along with the attachment of a tank access manifold (20), at an inner portion of the directional fluid body (10) are arranged first and second grooves (13 and 14) interspersed by a pressurized seal (15), a rear directional coupling seal (16), a lower directional coupling seal (17) and a depressurization safety seal (18), wherein either connecting and/or disconnecting a hose allows for directing a fluid to the tank access manifold (20) through the first and second grooves (13 and 14);

• the tank access manifold (20) defining an upper hole that receives an access terminal (21), the access terminal (21) being fitted and sealed to the tank access manifold (20) through an access terminal sealing ring (22), the tank access manifold (20) fitted over the directional fluid body (10), the tank access manifold (20) and the directional fluid body (10) together forming a relief chamber (23), wherein the relief chamber (23) is interconnected with the first and second grooves (13 and 14) and is sealed by the pressurized seal (15) and the depressurization safety seal (18);
• an intermediate sleeve (30) provided in its outer portion with a spring groove allowing for the disposition of a spring (31) and a vent protector groove that receives a vent protector (32) and in its inner portion the intermediate sleeve has and intermediate seal (33) arranged with a relief valve (50), the intermediate sleeve (30) which is fitted and fixed superimposed on an end of the directional fluid body (10), leaning against the tank access manifold (20);
• a coupling gantry (40) which is fitted and fixed superimposedly on an end of the intermediate sleeve (30), together with the intermediate sleeve (30) forming a spring chamber (41) that houses the spring (31) and in an inner portion of the coupling gantry (40) is a sealing ring (42) fixed to an inner frame (50);
• the relief valve (50) provided with a seal (51) arranged in a central portion, a set of directional fluid holes (52) and a set of holes (53) of larger diameter for valve equalization, the relief valve (50) having in its central portion a passage section (54) of pressurized fluid;
• the seal (51) is arranged next to a chamber (34) formed by a junction of the intermediate sleeve (30) with the directional fluid body (10), the chamber (34) having a vent hole (35) arranged next to the vent protector (32) depicted on the outer portion of the intermediate sleeve (30);
• the relief valve (50) when at rest keeps the set of directional fluid holes (52) aligned on the inner portion of the directional fluid body (10), and the set of holes (53) is arranged between the rear directional coupling and lower directional coupling seals (16 and 17) and between the first and second grooves (13 and 14), keeping a line pressurized;
• when the relief valve (50) is moved, through an action of pushing the coupling gantry (40), the set of directional fluid holes (52) are displaced along the first groove (13) between the pressurized and rear directional coupling seals (15 and 16) and the seal (51) and the set of holes (53) are displaced inside the chamber (34) in order to relieve a pressure in the line, directing the fluid back to a tank through the access terminal (21) allowing air to exit the vent hole (35) when connecting the hose to the coupling gantry (40);
• and
• when the relief valve (50) is moved through an action of pulling the coupling gantry (40), the set of directional fluid holes (52) are displaced along with the second groove (14) between the lower directional coupling and depressurization safety seals (17 and 18) in order to relieve the pressure, directing the fluid to return to the tank through the access terminal (21) when disconnecting the hose from the coupling gantry (40).