PROBLEM TO BE SOLVED: To provide a valve for grease injection that can suppress excessive pressure to a foreign matter entry preventive valve owing to a back flow of grease in the case that a back-flow preventive valve does not function.SOLUTION: A foreign matter entry preventive valve 18 is arranged upstream from a back flow preventive valve 17 of a flow passage 15 of a valve body 16. A groove part 47 is provided which links an upstream side and a downstream side of a foreign matter entry preventive valve body 44 at a periphery of the foreign matter entry preventive valve body 44 of the flow passage 15. When the back flow preventive valve 17 does not function, high-pressure grease from the groove part 47 bypasses the foreign matter entry preventive valve body 44 to be discharged to outside a valve 10 for grease injection, thereby suppress excessive pressure to the foreign matter entry preventive valve 18 due to a back flow of the grease.SELECTED DRAWING: Figure 1
【課題】逆流防止弁が機能しなかったときのグリースの逆流による異物侵入防止弁への過剰な圧力を抑制できるグリース注入用バルブを提供する。【解決手段】バルブ本体16の流路15の逆流防止弁17の上流側に異物侵入防止弁18を配置する。流路15の異物侵入防止弁本体44の周囲にて異物侵入防止弁本体44の上流側と下流側とを連通して溝部47を設ける。逆流防止弁17の機能不全時には溝部47から高圧のグリースが異物侵入防止弁本体44をバイパスしてグリース注入用バルブ10の外部へと排出され、グリースの逆流による異物侵入防止弁18への過剰な圧力を抑制できる。【選択図】図1
INCOMPRESSIBLE LIQUID INJECTION DEVICE
非圧縮性流体注入装置
2017-08-10
Patent
Electronic Resource
Japanese