Pressure self-sealing device for manhole cover of powder tanker

Pressure self-sealing device for manhole cover of powder tanker

CN
  • CN 103,213,781 B
  • Filed: 03/28/2013
  • Issued: 04/08/2015
  • Est. Priority Date: 03/28/2013
  • Status: Active Grant
First Claim
Patent Images

1. manhole cover of powder tanker pressure self-sealing device, comprise tank body, be connected to the manhole collar on tank body, match with manhole cover in the top of manhole collar, manhole cover there is handle (30), mounting sealing device in manhole cover, manhole collar arranges locking mechanism, it is characterized in that:

  • described sealing arrangement comprises the seal ring (5) that cross section is Y shape, described seal ring (5) comprises to be faced directly (51), long curved surface (52), short curved surface (54) and interior inclined-plane (56) composition upper limb (58), bottom wing (59) and base portion (50), hold down groove (53) is shaped with in the corner facing (51) and short curved surface (54) directly, protruding sealing lip (55) is shaped with at the head of upper limb (58) and bottom wing (59), on seal ring, lower wing section becomes large from sealing lip oral area gradually to base portion (50), arc surface (57) is shaped with at the mid point of interior inclined-plane (56), resilient mounting circle (6) is set in arc surface (57), circular groove (31) is shaped with in described manhole cover (3), convex shoulder (32) is had in circular groove, in circular groove (31), seal ring (5) is installed, the gap (33) of distortion is left between circular groove (31) and long curved surface (52), convex shoulder (32) matches with the hold down groove (53) of seal ring (5), one end of described manhole cover is connected with manhole collar through hinge (7), described manhole collar (2) comprises circular connecting cylinder (21), the outside of connecting cylinder is shaped with backplate (22), the inner side of connecting cylinder (21) is shaped with and holds decorative cover (23), what hold decorative cover (23) is the conical surface (231) above, the sealing lip (55) of described seal ring (5) upper limb (58) contacts with the end face (34) of manhole cover (3) circular groove (31), the conical surface (231) that sealing lip (55) and the manhole collar (2) of seal ring (5) bottom wing (59) hold decorative cover (23) contacts, the conical surface that bottom wing (59) sealing lip (55) realizes sweeping manhole collar (2) at the closing process of manhole cover (3) holds decorative cover (23), automatic cleaning sealing surfaces, avoid residual powder interference seal face, the below of manhole collar (2) backplate (22) is connected with tank body (1), the other end that described locking mechanism is included in manhole cover (3) is shaped with clamp (35), manhole collar (2) backplate (22) arranges stay bearing plate (81), locking slot (82) is shaped with in stay bearing plate (81), camshaft (83) is set in locking slot (82), the upper assembly wrench (84) of camshaft (83), described camshaft (83) comprises the face of cylinder (85) and section (86), camshaft contacts with the clamp (35) of manhole cover, the sealing surfaces of high resiliency seal lip contact sealing manhole collar (2) of y-shaped ring (5), and it is pre-sealed to realize low pressure by the elastic acting force generation seal pressure of seal lip, the sealing lip (55) of seal ring upper limb and the circular groove (31) of manhole cover (3) leave gap (33), avoid seal ring crimp and affect the elastic tension power of sealed lip, guarantee sealing effectiveness, on seal ring (5), bottom wing (58,

         59) cross section becomes large from sealing lip (55) oral area gradually to base portion (50), its shape is arc-shaped, to ensure certain elastic deformation space, keep certain shape retentivity, guarantee sealing effectiveness, by the coated sealing surface holding decorative cover (23) of the lower bead of manhole cover (3), can effectively prevent rainwater and other foreign matter from corroding manhole collar (2) sealing surface, prevent powder from depositing, the sealing of manhole cover (3) and manhole collar (2) is locked and is realized with turning round by sliding of camshaft (83), namely after the manhole cover that closes contacts with manhole collar, camshaft is slided after putting in place along the locking slot (82) of guiding to the clamp (35) of manhole cover (3), the clamp of manhole cover is pushed down by 90 degree of revolutions of camshaft (83), and make the seal ring of manhole cover and the comprehensive uniform contact of manhole collar'"'"'s sealing surfaces, closedown and the locking operation of manhole cover can be completed, whole process one unification pushes away one turn, accomplish without any letup.

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