Pressure relief valve with a poppet valve seal
OwnerWolfgang Vossinventor
Life of this patent
Estimating the term…
Abstract
A pressure relief valve 1 having small dimensions and generating a high flow rate comprises an annular channel 15 between the pressure medium inlet 7 and the pressure medium outlet 8, the channel acting on a sealing cone 17 made of a special plastic material at the upper end of the closing unit 17 in case of pressure peaks such that the same is lifted out of the sealing seat 12 against the force of the valve spring 6. An embodiment is also possible in which the corresponding sealing rings 76, 80 must be passed over. The inner bore 9 of the pressure relief valve 1 has a stepped wall 21, so that a differential pressure relieving the valve spring 6 is generated.
Claims14
A pressure relief valve for use in hydraulic, oil-in-water and water assemblies, in particular for hydraulic props used at a pressure above 400 bar in underground mining and tunnel construction, comprising a closing unit (10, 50), which is arranged displaceably between a pressure medium inlet (7) and a pressure medium outlet (8) against the force of an adjustable valve spring (6) and which at normal pressure is kept in a sealing position by means of the valve spring (6), characterized in that between the pressure medium inlet (7) and the pressure medium outlet (8) an annular channel (15) that is sealed by the closing unit (10, 50) with respect to the pressure medium outlet (8) is configured, wherein the closing unit (10, 50) is acted on in case of pressure peaks such that it can be moved into the open position against the force of the valve spring (6) and a valve shaft (18) and/or an inner bore (9) receiving it are configured to generate a differential pressure relieving the valve spring (6), and wherein a sealing cone (17) is detachably connected to the valve shaft (18) by means of a countersunk screw (25) that also captures a spring plate (24).
A pressure relief valve for use in hydraulic, oil-in-water and water assemblies, in particular for hydraulic props used at a pressure above 400 bar in underground mining and tunnel construction, comprising a closing unit (10, 50), which is arranged displaceably between a pressure medium inlet (7) and a pressure medium outlet (8) against the force of an adjustable valve spring (6) and which at normal pressure is kept in a sealing position by means of the valve spring (6), characterized in that between the pressure medium inlet (7) and the pressure medium outlet (8) an annular channel (15) that is sealed by the closing unit (10, 50) with respect to the pressure medium outlet (8) is configured, wherein the closing unit (10, 50) is acted on in case of pressure peaks such that it can be moved into the open position against the force of the valve spring (6) and a valve shaft (18) and/or an inner bore (9) receiving it are configured to generate a differential pressure relieving the valve spring (6), characterized in that a rectangular sealing ring (20) comprising PTFE is arranged at the lower end (19) of the valve shaft (18) and is pressed onto a wall slinger washer (33) by means of a ring screw (32) having a circumferential tip (31).
A pressure relief valve for use in hydraulic, oil-in-water and water assemblies, in particular for hydraulic props used at a pressure above 400 bar in underground mining and tunnel construction, comprising a closing unit (10, 50), which is arranged displaceably between a pressure medium inlet (7) and a pressure medium outlet (8) against the force of an adjustable valve spring (6) and which at normal pressure is kept in a sealing position by means of the valve spring (6), characterized in that between the pressure medium inlet (7) and the pressure medium outlet (8) an annular channel (15) that is sealed by the closing unit (10, 50) with respect to the pressure medium outlet (8) is configured, wherein the closing unit (10, 50) is acted on in case of pressure peaks such that it can be moved into the open position against the force of the valve spring (6) and a valve shaft (18) and/or an inner bore (9) receiving it are configured to generate a differential pressure relieving the valve spring (6), characterized in that a guide sleeve (38) is associated with the valve shaft (18) and arranged between a wall slinger washer (33) and the front part (41) of the pressure medium inlet (7) in a longitudinally grooved ring (49), enveloping the valve shaft (18).
Dependencies are inferred from the claim text.