Fastening type sand box cover

A sand box cover and snap-on technology, which is applied in the field of rail transit vehicles, can solve the problems of large operating space of the sand box cover, failure to release the pressure of the sand box cover, and excessive pressure of the sand box, so as to achieve small space occupation and convenient operation , pressure sensitive effect
CN109895809AInactive Publication Date: 2019-06-18XIAN KAITIAN RAILWAY ELECTRICAL
7 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN KAITIAN RAILWAY ELECTRICAL
Publication Date
2019-06-18
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a fastening type sand box cover. The fastening type sand box cover comprises a cover body, the middle of the top of the cover body is provided with an overpressure protection device, which is fixedly connected with the cover body through an overpressure protection seat, inside the overpressure protection seat forms an exhaust channel, one end of the exhaust channel is communicated with the atmosphere, the other end of the exhaust channel is connected with a predischarging port, inside the exhaust channel is provided with an adjusting piece which is movably connected with one end of a pressure maintaining base through a spring, the other end of the pressure maintaining base is fixedly connected with a first sealing ring through a snap spring, and the first sealing ring can be in contact with the inner surface of a pressure maintaining mounting base to block the exhaust channel and the predischarging port or separated from the inner surface of the pressure maintaining mounting base to communicate the exhaust channel and the predischarging port. The fastening type sand box cover solves the problems that an existing sand box is large in operation space and failsto relieve pressure due abnormally excessive large internal pressure and the cover of the existing box is easy to slip off.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of rail transit vehicles, and in particular relates to a buckle-type sand box cover. Background technique

[0002] Rail transit vehicles use the traction and brake adhesion friction generated by the interaction between the wheel and rail to realize the operation of the train. The purpose of sanding is to use sand to increase the friction between the wheel and the rail surface, shorten the braking distance and increase the friction of climbing. . At present, the sand spreading device for EMUs generally adopts the differential pressure sand spreading device, and its principle is to blast the sand in the sand box to the rail surface through the pressure of compressed air. Due to its working characteristics, the differential pressure sand spreading device has an airtight requirement on the sand box cover to maintain the pressure in the sand box.

[0003] At present, the generally used sand box cover is integra...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More