CN2456982Y - Pneumatic-control valve and its braking pipeline system - Google Patents

Abstract

The utility model belongs to the technical field of a valve. The utility model discloses a pneumatic-control valve structure and a braking pipeline system which utilizes the valve. The utility model has the main technical characteristics that the utility model comprises a housing, a housing inner column-shaped cavity, a piston with a piston rod and a reset spring, inlets and outlets of control air stream and under control air stream, a pneumatic brake valve which is composed of a piston valve gate and a sealing spacing ring, and the braking pipeline which is composed of a wet air container, a manual valve, and a pneumatic control valve. The problem that a steal brake and the brake is relieved and recovered slowly in the process of vehicle running because the airflow air pressure of the manual valve and a trailer braking valve in not matched at present is solved, and safety hidden troubles are eliminated.

Description

Pneumatic control valve and drag pipeline system thereof

The utility model is a valve technology field, relates to a kind of compression air brake control cock specifically and utilizes the drag pipeline system of this valve as by-pass valve control.

At present, the structure of pneumatic brake brake piping system that has the automobile of trailer is: the pressurized air in the wet air tank (being source of the gas) is behind hand valve, one the tunnel enters the drg that main car braking during standstill air chamber is controlled main car, and another road is through the drg of dual circuit trailer braking valve control trailer.But because the output pressure design maximum amount of hand valve is between 441-490Kpa; and realize that with the trailer of being controlled the required 833Kpa of dual circuit trailer braking valve of brake obviously can not mate, so pulling brake after regular meeting's generation trailer is stopped (promptly occurring the brake phenomenon suddenly) and parking brake steathily in traveling process, the automobile that band is pulled removes slow phenomenon.The frequent appearance of this phenomenon is driven to exercise for comrade driver and be caused great potential safety hazard.

The purpose of this utility model just provides the pneumatic control valve that a kind of air-flow air pressure of controlling air pressure and input, output pressure and brake is complementary.

Second purpose of the present utility model just provides a kind of drag pipeline system that slow defective is removed in the back of stopping steathily and brake that overcome.

The technical scheme that realizes the pneumatic control valve that the purpose of this utility model proposes is: its structure comprises cylindrical outer cover, the upper end side of described shell has the import of control air-flow, its lower end has the import and the outlet of Be Controlled air-flow, a band platform ring that can slide along its inner wall sealing and the relay piston of piston rod are arranged in the cylindrical cavity that described enclosure forms, this piston is divided into sealed air chamber and open air chamber two parts with described cavity, in the cavity of open air chamber, be with the little cylindrical cavity of the lower ending opening of garden platform in the band, being set with a band retracing spring in the cavity of this little cylindricality can slide and unlatching along its inwall, closing the Be Controlled air-flow advances, the column casing of outlet, described piston rod enters little cylindrical cavity and promotes the column casing slip, in open air chamber, be fixed with a leak free piston spacer ring around piston rod, piston rod can seal slip, is fixed with piston reset spring between described piston spacer ring is with piston platform ring.

Fixing " O " shape seal ring on the described in addition piston spacer ring.

The pressurized air that consists of in the wet air tank that realizes the drag pipeline system that overcomes the slow defective of releasing of stopping steathily and brake that the utility model purpose is proposed is divided into three the tunnel:

The first via is communicated with the control airflow inlet of the gentle pressure-controlled valve of main car compressed air brake cylinder respectively through manual brake activation valve;

The second the tunnel then is communicated with the import of the Be Controlled air-flow of pneumatic control valve, and is communicated with the trailer braking protection valve air chamber through air stream outlet.

Third Road is communicated with the control trailer braking protection valve with the trailer braking protection valve air chamber after then being communicated with brake activation valve again.

Pneumatic brake control cock that the utility model proposed and drag pipeline system thereof are compared with prior art and are had the following advantages: owing to fixed a sealing spacer ring so reduced the volume of piston cavity in the cavity of pneumatic control valve, make the pressurized air of source of the gas enter air pressure behind the piston and the phenomenon that die-offs because of the increase in space can not occur, make output pressure identical with the air pressure of source of the gas; Its two owing to be fixed with retracing spring in piston and sealing between the spacer ring, it can reset piston rapidly after cutting off the vapour source, has overcome to only depend on the slow problem of air-flow air pressure promotion piston reset in the prior art; They are three years old, owing in the drag pipeline system, be communicated with pneumatic control valve, it promptly is the piston of the hand valve control pneumatic control valve of 441～490KPa by the output maximum gas pressure, and the trailer drag air chamber of air pressure to be the source of the gas of 883KPa directly need through the control of this valve 883KPa air pressure, the output pressure that has solved the parking brake valve is with the unmatched problem of the required air pressure in trailer drag chamber, overcome stopping steathily of existing in the driving process and parking brake and removed the slow defective that resets, eliminated existing potential safety hazard in the automobile traveling process.

Below in conjunction with accompanying drawing and example the pneumatic control valve that the utility model proposed and the structure and the principle of drag road system are described in further details:

Fig. 1: the constructional drawing of pneumatic control valve;

Fig. 2: drag pipeline system figure.

Be illustrated in figure 1 as the structure principle chart of manual pneumatic brake control valve.Its structure includes the shell 1 of tubular, has an import 12 as the control air-flow in the upper end of this shell, and its lower end has the import 8 and the outlet 14 of the compressed air stream of being controlled by the control air-flow.Center fixed in the cylindrical inner chamber of this control cock has a sealing spacer ring 5, and inner chamber is divided into upper and lower two parts.The relay piston 2 that the sealing spacer ring 5 that wherein has its piston rod 6 to pass in the cavity of top to have the O RunddichtringO 17 that seals slides, and between the platform ring 18 of piston is with spacer ring 5, be fixed with a retracing spring 4, then be with a cylinder barrel 13 that has interior garden platform 16 in the cavity of lower part, in this cylinder barrel, be set with the trunnion piston valve 7 of a band ring washer 9, the lower end is fixed with sealing slipping ring 10, and the retracing spring 15 of a simple shape piston valve is installed between sealing slipping ring and ring washer.The import and export of opening as previously mentioned at the compressed air stream of shell lower end 8,14 is communicated with, cuts off through this trunnion piston valve 7, promptly the piston in the cavity of top slides, and the piston of its piston rod 6 passes the take blame for others ring washer 9 of tube of spacer ring 5 and makes its upper and lower slip and realize the switch of piston valve 7.

Its principle of work is: the control air-flow enters in the cavity sealing air chamber 3 through its import 12, and compression relay piston 2 moves down, and piston rod 6 promotes valve ring washer 9 and opens valve, and compressed air stream enters and exports 14 through valve 7 from it from its import 8 and flows out.When cutting off compressed air stream, need at first control the air-flow decompression, on under piston reset spring 4 effects, move, be trunnion piston valve 7 under its retracing spring 15 effects also with on move the cut-out that realizes compressed air stream, the high pressure draft that exports 14 sides then conforms to the principle of simplicity to emit in the passage 11 of shape piston bore.

Be illustrated in figure 2 as the vehicle brake pipe path control system that adopts pneumatic control valve, be that the source of the gas 20 of 833KPa is told three road air- flow delivery pipes 21,22,23 promptly from output pressure, after air flow inlet 8 connections of first via air-flow delivery pipe 21 with pneumatic control valve 30, be communicated with through the brake repair room 29 of its outlet 14 with auto trailer, and the second road air-flow delivery pipe 22 is told two-way again behind manually actuated control valve 24, one of them road gas flow tube 26 is communicated with the compressed air brake cylinder 25 of main car, realizes the control to main car wheel; 19 of another road gas flow tube are communicated with to realize that first via gas flow tube 21 is opened the control of closing to realize the brake of trailer with the control air pressure imports 12 of pneumatic control valve, after Third Road gas flow tube 23 is communicated with driving brake activation valves 27, again through gas flow tube 28 with trailer braking protection valve air chamber 29; Be communicated with the braking that is used to control the gas trailer.It is the direct connection that needs the trailer braking valve of 833KPa pressure together of parking brake valve control control of 441～490KPa through peak output air pressure that this vehicle brake pipe path control system can make the wet air tank of the air-flow that produces 833KPa, the automobile brake pipeline that has overcome existing employing dual circuit trailer braking valve often is unworthy of with the trailer braking valve that needs 833KPa pressure because of output pressure only is 441～490KPa, easily causes normal appearance in the driving process to stop steathily and parking brake is removed the problem of slow hidden danger.In this vehicle brake pipe path control system, separately each is with a pipeline for service brake (service brake) and parking brake (braking during standstill), in case service brake is malfunctioning, can press braking during standstill is the may command trailer, thereby has increased traveling security.

Claims (3)

1, a kind of pneumatic control valve, its structure includes: cylindrical outer cover, the upper end side of described shell has the import of control air-flow, its lower end has the import and the outlet of Be Controlled air-flow, a band platform ring that can slide along its inner wall sealing and the relay piston of piston rod are arranged in the cylindrical cavity that described enclosure forms, this piston is divided into sealed air chamber and open air chamber two parts with described cavity, in the cavity of open air chamber, be with the little cylindrical cavity of the lower ending opening of garden platform in the band, being set with a band retracing spring in the cavity of this little cylindricality can slide and unlatching along its inwall, closing the Be Controlled air-flow advances, the column casing of outlet, described piston rod enters little cylindrical cavity and promotes the column casing slip, it is characterized by in open air chamber and be fixed with a leak free piston spacer ring around piston rod, piston rod can seal slip, is fixed with piston reset spring between described piston spacer ring is with piston platform ring.

2, a kind of pneumatic control valve as claimed in claim 1, its feature be fixing " O " shape seal ring on described piston spacer ring.

3, utilize the drag pipeline system of the described pneumatic control valve of claim 1, it is characterized by: the pressurized air in the wet air tank is divided into three the tunnel:

The first via is communicated with the control airflow inlet of the gentle pressure-controlled valve of main car compressed air brake cylinder respectively through manual brake activation valve;

The second the tunnel then is communicated with the import of the Be Controlled air-flow of pneumatic control valve, and is communicated with the trailer braking protection valve air chamber through air stream outlet.

Third Road is communicated with the control trailer braking protection valve with the trailer braking protection valve air chamber after then being communicated with brake activation valve again.

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