CN2152727Y

CN2152727Y - Shutoff prevention angle cock

Info

Publication number: CN2152727Y
Application number: CN 93233519
Authority: CN
Inventors: 唐国良
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-20
Filing date: 1993-03-20
Publication date: 1994-01-12
Anticipated expiration: 2003-03-20

Abstract

The utility model relates to an angle cock which utilizes the pressure air in the train pipe of railway rolling stock to prevent from being shut off, wherein, after the train pipe is charged, the pressure air drives the piston rods arranged on the spring cover and in the valve core to move up to cause an octagonal shaft to be inserted into an anti-rotation disc, and then the angle cock can be prevented from being shut off; when a train is shut down by service braking, the angle cock can not be shut off, either; only when the air pressure of the train pipe is reduced down to setting value, a return spring can drive the piston rods down to the lower part, and then the angle cock can be shut off. The pressure air can be discharged from the train pipe after the angle cock is shut off. The utility model is provided with the functions of air discharge and shutoff prevention after being charged, and the design is reasonable and safe, providing a new style safety device for safe driving on railway.

Description

Shutoff prevention angle cock

The utility model relates to the rolling stock's air brake equipment in the traffic and transport field, is installed on the tail end of rolling stock train pipe.

Present rolling stock brake equipment, have only minority import locomotive to use the knuckle plug of band exhaust, have no progeny and can discharge the pressure air of train flexible pipe in the pass, and a large amount of angle cocks that use only have and turn on and off two kinds of functions, Dg25.32 angle cock for example, this kind angle cock is had a mind to easily after train fills wind or is by mistake turn-offed and be difficult to realize, even the angle cock of band exhaust, when turn-offing simultaneously, adjacent two plug doors also are difficult to realize, make the train forfeiture braking function that travels, cause train to put the slope, dash real, off-line even the grave accident of running multiple take place, this is that railway interests is in driving secure context key subjects anxious to be solved, simultaneously, this kind angle cock is also had no progeny in the pass easily and is caused injury to human body when untiing the train flexible pipe.

The purpose of the utility model is intended to develop and a kind ofly has degassing function, rolling stock train pipe and fill the anti-shutoff angle cock that prevents to turn-off, guarantee train traffic safety behind the wind.

Fig. 1 is the utility model structural representation.

The technical solution of the utility model is: at the cock body 2 of existing angle cock, cut down core 1, on the basis of spring 7, redesign a kind of spring cup 8, be processed with above the fixedly square hole of piston cylinder 19 and anti-rotation, cavity at spring cup 8 and cock body 2 compositions is equipped with piston rod 9, return spring 14, anti-rotation disks 5, cut down centering spring seat 16 is housed in the core 1, anti-rotation disks 5 is fixed on cuts down core 1 bottom, piston rod 9 can move up and down, three ones of piston rod 9 upper, middle and lowers are respectively guide rod 20, square body 21 and piston 22, have the ventilating duct 4 of connection on spring cup 8 and the cock body 2,4 liang of ventilating ducts End is communicated with respectively the train pressure air pipe of piston cylinder 19 cavity of resorptions and cock body 2, anti-rotation disks 5 has and the match interior square hole of size of piston rod square body 21, cock body 2 has steam vent 18, cut down core 1 and have steam vent 17 by the hose side, cock body 2 also passes through steam vent 13 outer logical atmosphere with the cavity that spring cup 8 forms.

Below in conjunction with accompanying drawing the technical solution of the utility model is described in further detail:

As shown in Figure 1, on cock body 2 and spring cover 8, have air flue 4 until the middle part of spring cover 8 piston cylinder 19, air flue 4 other ends communicate with the pressure air of rolling stock train pipe, piston rod 9 is installed on spring cover 8 and cuts down in the core 1, piston rod 9 is by guide rod 20, square body 21, piston 22 3 parts are formed an integral body, square body 21 is all directions body or is spline, gear, ratchet or other positioning uniies, guide rod 20 all has seal ring 15 and 12 with piston 22, cut down spring perch 16 is housed in the core 1, between all directions body 21 of spring perch 16 and piston rod 9, restoring spring 14 is housed, the anti-rotation disks 5 in hole, all directions in band is equipped with in the bottom of cutting down core 1, because the variation of train pipe air pressure, piston rod 9 can move up and down, and cock body 2 has deflation hole 18 and cuts down core 1 and has deflation hole 17 by train flexible pipe side, closes when angle cock is opened, close the then logical atmosphere of having no progeny, cavity in that cock body 2 and spring cover 8 are formed has deflation hole 13, leads to atmosphere all the time.

When rolling stock train pipe fills wind, pressure air is through cock body 2, the air flue 4 that extension pipe 3 and spring cover 8 are communicated with arrives in the piston lower piston cylinder 19 of piston rod 9, when reaching certain blast, tension force and 20 blast of piston rod 9 guide rods that promotion piston rod 9 overcomes restoring spring 14 move up, all directions body 21 insertions at piston rod middle part are installed in the anti-rotation disks of cutting down on the core 15, and lower part is still in the square hole of fixing spring cover 8, therefore cutting down core can not rotate, promptly can not turn-off, guide rod 20 parts at piston rod 9 are equipped with seal ring 15, it is the difference of pressure that destroys for the pressure air that prevents the train pipe seals in the cavity that cock body 2 and spring cover 8 form about the piston rod, in case seal ring 12 and seal ring 15 are slightly sewed, can arrange to atmosphere by vent 13, and the reliability that pressure influences the piston rod action is closed in unlikely formation.

After train comes to a complete stop, impose again when the pressure drop of train manage-style is to setting behind the emergency brake, the difference of pressure of guide rod 20 tops of piston rod 9 and piston below reduces, restoring spring 14 is pushed piston rod 9 to below, body 21 leaves anti-rotation disks 5 from all directions, and cut down core 1 and can rotate this moment, can turn-off, the setting of above-mentioned operating value can change the stiffness of the ratio of the guide rod 20 of piston rod and piston 22 sections and restoring spring 14 and gives amount of compression and finish.

Angle cock closes has no progeny, and to atmosphere, train flexible pipe ventilation pressure loss to 0 just can be untied the train flexible pipe to the remaining pressure air of train flexible pipe through vent 17 and vent 18 rows, unlikely human body is damaged.

Extension pipe 3 is welded on the cock body 2, and this can save wide variety of materials and expense like this at old angle cock transformation, if new system, then should be with extension pipe 3 and cock body 2 casts solid.

Advantage: both had degassing function, the rolling stock train pipe is filled prevent from behind the wind turn-offing, guarantee train traffic safety, the utility model is reasonable in design, it is simple, safe and reliable to be skillfully constructed, to make, for China's train operating safety has solved a great problem, be worth promoting.

The accompanying drawing marking explanation:

1-cuts down core 2-cock body 3-extension pipe 4-air flue

5-anti-rotation disks 6-hold-down bolt 7-spring

8-spring cover 9-piston rod 10-assembles sighthole

11-screw plug 12-seal ring 13-vent

14-restoring spring 15-seal ring 16-centering spring seat

17-vent 18-vent 19-piston cylinder

20-guide rod 21-square body 22-piston

Claims

1, the anti-shutoff angle cock of a kind of rolling stock air brake, has cock body (2), cut down core (1), spring (7), it is characterized in that also having spring cover (8), be processed with the fixedly square hole of piston cylinder (19) and anti-rotation above, cavity at spring cover (8) and cock body (2) composition is equipped with piston rod (9), restoring spring (14), anti-rotation disks (5), cut down centering spring seat (16) is housed in the core (1), anti-rotation disks (5) is fixed on cuts down core (1) bottom, piston rod (9) can move up and down, three ones of piston rod (9) upper, middle and lowers are respectively guide rod (20), square body (21) and piston (22), have the air flue (4) of connection on spring cover (8) and the cock body (2), air flue (4) two ends are communicated with the train pressure air pipe of piston cylinder (19) cavity of resorption and cock body (2) respectively, and anti-rotation disks (5) has and the match interior square hole of size of piston rod square body (21).

2, according to the anti-shutoff angle cock of claim 1, it is characterized in that cock body (2) has deflation hole (18), cut down core (1) and have deflation hole (17) by train flexible pipe side, cock body (2) also passes through the outer logical atmosphere of deflation hole (13) with the cavity that spring cover (8) is formed.

3, according to the anti-shutoff angle cock of claim 1, the square body (21) that it is characterized in that described piston rod (9) is body from all directions or, gear strong for spending, ratchet or other positioning uniies.

4,, it is characterized in that guide rod (20) partial sum piston (22) part of described piston rod (9) is equipped with seal ring (15), (12) respectively according to the anti-shutoff angle cock of claim 1.

5,, it is characterized in that also being welded with on the cock body (2) extension pipe (3) or extension pipe (3) and cock body (2) cast solid according to the anti-shutoff angle cock of claim 1.