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    • 5. 发明授权
    • Lock apparatus for introducing dry granular materials into a pneumatic
conveying conduit and spray gun for such materials
    • 用于将干燥颗粒材料引入用于这种材料的气动输送管道和喷枪的锁定装置
    • US4893966A
    • 1990-01-16
    • US212883
    • 1988-06-29
    • Franz Roehl
    • Franz Roehl
    • B65G53/32B65G53/46E04F21/12E04G21/04
    • B65G53/32B65G53/4675E04F21/12E04G21/04Y10T137/86413Y10T137/86445
    • A lock apparatus for introducing granular dry material into a pneumatic conveying conduit (32), for example of a concrete gun, consisting of a material feeding hopper (4) having a shut-off valve (6) actuable by a pneumatic working cylinder (8). Beneath the shut-off valve (6) two hose portions (16 and 22) are arranged in series and on each of said portions a hose squeezing means (34 and 38) engages between which the hose portions (16 and 22) form a lock chamber (44) which is additionally provided with a blowing air connection (62). By the shut-off valve (6) and the upper hose squeezing means (34) an antechamber (42) is formed. When the upper hose squeezing means (34) is closed and the shut-off valve (6) opened the antechamber (42) is filled from the feeding hopper (4) by free fall. At the same time the lock chamber (44) can be discharged into the blow conduit (32) by opening the hose squeezing means (38). The uppermost (6) and lowermost (38) shut-off members then close again and by opening the upper hose squeezing means (34) the contents of the antechamber (42) are discharged into the lock chamber (44). The hose squeezing means (34 and 38) operate against an empty hose. The sole material-contacted shut-off member is the shut-off valve (6). The apparatus otherwise comprises no wearing sealing parts.
    • 一种用于将颗粒状干燥材料引入到例如混凝土喷枪的气动输送管道(32)中的锁定装置,其由具有可由气动工作缸(8)致动的截止阀(6)的材料进料斗(4)组成 )。 在截止阀(6)下方,两个软管部分(16和22)串联布置,并且在每个所述部分上,软管挤压装置(34和38)接合在其间,软管部分(16和22)形成锁 另外设置有吹风空气连接(62)的室(44)。 通过截止阀(6)和上软管挤压装置(34)形成前室(42)。 当上部软管挤压装置(34)关闭并且关闭阀(6)打开的前厅(42)由进料斗(4)通过自由落体填充时。 同时,通过打开软管挤压装置(38)可以将锁定室(44)排出到吹风管道(32)中。 最上(6)和最下(38)关闭件然后再次关闭,并且通过打开上软管挤压装置(34),前厅(42)的内容物被排放到锁室(44)中。 软管挤压装置(34和38)对空的软管进行操作。 唯一的材料接触的切断构件是截止阀(6)。 该设备否则不包括佩戴的密封部件。