CN2516410Y - Double-cavity booster relay valve and its brake pipe system - Google Patents

Abstract

The utility model belongs to a valve technical field, which discloses a dual-chamber boosting relay valve and a braking pipeline system which utilizes the boosting relay valve. The utility model is characterized in that: the dual-chamber boosting relay valve comprises a shell, a cylindrical cavity inside the shell, a piston with cylinder and a hollow long stem piston for matching with the piston with cylinder, a valve block barrel, a reset spring, two directive flow inlets and two sets of compressible flow inlet and outlet for controlling a braking chamber, and a piston curl; and the braking pipeline system comprises a wet air reservoir, a four-circuit protection valve, a pedal braking valve and a trailer braking valve, and a dual-chamber boosting relay valve. The utility model can solve the problems of the prior car with trailer that the trailer can not be braked once the exposed braking pipeline of the trailer connecting with the front-wheel drive of the car has a failure, so the traffic safety of the car with trailer can be enhanced.

Description

Two-chamber power-assisted relay valve and drag pipeline system thereof

Technical field:

The utility model belongs to valve technology field, relates to a kind of air brake valve specifically and utilizes the drag pipeline system of this valve as control servo valve.

Prior art:

At present, have the trailer automobile pneumatic brake brake piping system structure as shown in the figure: the compressed air stream in the main air reservoir (source of the gas) 26 is after pin touches on the brake brake activation valve 27, one the tunnel enters the brake of the trailing wheel brake repair room control trailing wheel 29 of main car, another road in front wheel brake chamber control front-wheel 28 brakes that enter main car, also as the instruction pneumatic circuit 30 of trailer back axle with the be connected braking of control trailer four-wheel 32 of braking valve 31.Its shortcoming is when being exposed to the order pipeline 30 between main car and the trailer or controlling main car front-wheel pipeline when breaking down, make whole trailer just can not realize braking, and the enforcement that the appearance of this fault can drive for the driver master worker bring great potential safety hazard.

Summary of the invention:

The purpose of this utility model just provides a kind of drag pipeline system that can the two-chamber power-assisted relay valve door of the chance of repeatedly braking is provided the trailer of automobile and utilize this valve.

The technical scheme of its two-chamber power-assisted relay valve is: comprise that inside has the column type tube chamber of boss ring, the shell of lower ending opening, middle part and bottom are fixed with the interior platform ring of two upper end bands up and down in the described tube chamber, the inboard, bottom is fixed with the cylindricality cylinder barrel that seals slipping ring, and inside respectively is set with a upper end and has diameter greater than valve shelves tube interior platform ring diameter wing limit and that be fixed with retracing spring together between the sealing slipping ring, and described tube chamber is divided into upper and lower two independent cavity; Have the first instruction gas port on the housing in described pillar buoy chamber from top to bottom in proper order, the first compressed air stream inlet, outlet and the second instruction gas port, second compressed air stream are imported and exported, and described first and second compressed air stream import is connected with the formed space of valve shelves tube with described cylindricality cylinder barrel; The center that is fixed with in the described upper chamber has the relay piston that can seal slip along inner wall surface thereof of the tube of falling the oral pillar, and its tube of falling the oral pillar is corresponding with the garden platform ring anchor ring of described upward valve shelves tube; In described lower chambers, fix one with its wall sealing piston that slide, the hollow stock of center band, the upper end of its hollow core stock has the venting eyelet and is inserted in the described tube of falling the oral pillar, and its lower end is then corresponding with the garden platform ring anchor ring of described lower valve shelves tube; Described two pistons are divided into upper and lower separate chamber the open air chamber of first and second sealed air chamber and first and second respectively, and wherein said first and second instruction airflow orifice is then opened on the housing in first and second sealed air chamber.

Additional technical feature is: the described first instruction airflow orifice is at the side wall surface of described shell; Be fixed with piston reset spring between the bulge loop of described relay piston with tube chamber mesospore; The end face of described relay piston is a concave panel; The shell of the column casing of described relay piston is a platform shape shape; The bottom enclosure of described hollow stock piston is a platform shape shape.

Utilize the drag pipeline system of the described dual-chamber brake of claim 1; for wet air tank behind four-loop protection valve respectively with main air reservoir and the trailer relay valve that is communicated with trailer air tank and brake repair room by pipeline connection, it is characterized by from three pipelines of main air reservoir output:

Article one, pipeline is after pin is stepped on brake activation valve, as the first instruction compression air-flow, the first instruction airflow orifice connection together of dual-chamber brake;

The second pipeline is communicated with main back wheels of vehicle brake repair room after first compressed air stream of described two-chamber power-assisted relay valve is imported and exported.

Article three, pipeline is after pin is stepped on brake activation valve; the second instruction admission port with main car front wheel brake chamber and two-chamber power-assisted relay valve is communicated with respectively; the described pipeline that is connected in loop protection valve and trailer relay valve; after second compressed air stream import and export connection with the two-chamber power-assisted relay valve, be communicated with the instruction air-flow input port of described trailer braking valve again.

Dual-chamber brake provided by the utility model and drag pipeline system thereof are compared with prior art, have the following advantages: because this dual-chamber brake has two brake chambers that work alone, the centre has a hollow stock that two brake pistons are connected, when the instruction air-flow of cavity of resorption lost efficacy, the relay piston of epicoele can promote to be fixed in the cavity of resorption piston on the hollow stock, realizes the control to compressed air stream import and export in the cavity of resorption; And when the instruction air-flow of epicoele lost efficacy, the piston that is fixed in the cavity of resorption on the hollow stock was realized control to compressed air stream import and export in its cavity of resorption by the instruction air-flow of cavity of resorption in the same old way.In the brake line system, promptly no matter which brake line of front and rear wheel of main car breaks down, and all can not influence the braking brake control of trailer, has promptly improved the traffic safety of heavily loaded band tandem truck widely.

Description of drawings:

Fig. 1: the drag pipeline system figure of existing use;

Fig. 2: two-chamber power-assisted relay valve structural representation;

Fig. 3: the drag pipeline system figure that the utility model proposes.

Embodiment:

Promptly in conjunction with the accompanying drawings the structure of the two-chamber power-assisted relay valve that the utility model proposed and the principle of drag pipeline system thereof are described in further details:

Be illustrated in figure 2 as the structural representation of two-chamber power-assisted relay valve.Comprise the column type shell, its sidepiece has the first instruction airflow orifice 1 (this instruction airflow orifice also can be opened the top at shell) from top to bottom, its middle part and bottom have the first compressed air stream import and export 2,3 and second compressed air stream imports and exports 4,5, upper and lower cylindricality cylinder barrel 9,10, the first cylinder barrels 9 that are fixed with first and second garden platform ring 7,8 lower ending openings in two bands are divided into upper and lower two cavitys independently with whole column casing on the barrel of the column casing that forms in the shell.Its centre is arranged for the tube of falling the oral pillar 11 and with the relay piston 13 of cavity wall through piston ring 12 sealing slips in upper plenum, be fixed with the first sealing slipping ring 14 on the inwall of first cylinder barrel 9, the upper end has the first valve shelves tube 15 on wing limit and fixes wherein through first retracing spring 16, and on can promoting by the column casing 11 of relay piston 13, lower slider, import and export 2,3 connection and cut-out to realize first compressed air stream.The inwall lower end of second cylinder barrel 10 in following cavity is fixed with the second sealing slipping ring 17, and its upper end has the second valve shelves tube 18 on wing limit and fixes wherein through second retracing spring 19.The upper end has hollow stock 42 upper ends of the hollow stock piston 20 of venting eyelet 6 and inserts in the tube of falling the oral pillar 11 of relay piston 13, the lower end is then corresponding with the wing limit of the second valve shelves tube 18, on the shell wall of second sealed air chamber 21 that forms on this piston, have the second instruction airflow inlet 22, enter compressed air stream by this import and can promote the upper and lower mobile of hollow stock piston and promote the second valve shelves tube, realize the connection and the cut-out of the second compressed air stream import and export 4,5.

In order to realize resetting of relay piston 13 and hollow stock piston 20, be fixed with retracing spring 24 at 23 of the bulge loops of two-piston and cavity.

Its principle of work is: compressed air stream promotes relay piston 13 and hollow stock piston 20 moves down simultaneously after compressed air stream enters first and second sealed air chamber 25,21 of relay valve from first and second instruction airflow inlet 1,22, and promotes first and second valve shelves tube 15,18 and move down the import that has realized first and second compressed air stream and export 2 and 3,4 and be communicated with 5; When cutting off the compressed air stream of first and second instruction airflow inlet 1,22, then relay piston and hollow stock piston move on action of reset spring, move on first and second valve shelves tube simultaneously, realize closing of first and second import and export of compressed air stream.

When the second instruction airflow pipeline breaks down, because the first instruction air-flow is when promotion relay piston 13 moves down, promote hollow stock piston 20 by column casing 11 and also move down, can realize in the same old way that promptly the connected sum of first and second compressed air stream import and export cuts off.

In order to prevent that when ambient temperature is below the freezing point temperature the moisture content in its wet gas current makes relay piston influence pistons work with the freezing bonding of outer casing inner wall face, the end face of its relay piston can be made concave surface.

Be illustrated in figure 3 as the braking automobile pipeline system diagram that the two-chamber valve is installed: promptly wet air tank 34 is communicated with by the admission port 37 of pipeline 38 with main air reservoir 26 and trailer braking valve 31 behind four-loop protection valve 35.3 pipelines of main air reservoir 26 outputs: article one pipeline 33 is after pin is stepped on brake activation valve 27, as the first instruction compression air-flow, the first instruction airflow inlet, 1 connection together of two-chamber power-assisted relay valve 36, the brake of main back wheels of vehicle 29 is controlled with the first compressed air stream import and export, 2,3 connections of two-chamber power-assisted relay valve 36 from the second pipeline 40 that main air reservoir picks out with realization.Article three, 41 of pipelines instruct airflow inlet 22 to be communicated with second of main car front-wheel 28 and two-chamber power-assisted relay valve respectively after pin is stepped on brake activation valve, to realize control to wheel brake before the main car, and after connecting via pipeline 38, the second compressed air stream import and export 4,5 with the two-chamber power-assisted relay valve is communicated with, is re-used as the instruction air-flow of trailer braking valve 31, to realize the brake control of trailer inflator 39 to its brake repair room 32.

Its principle of work: when each pipeline trouble free, this brake line system can realize the brake control to main car and trailer.When the pipeline of the main car front-wheel of control breaks down, promptly main car front-wheel can't be braked, second of the two-chamber power-assisted relay valve 36 instruction airflow inlet 22 airless input simultaneously, but give the first instruction airflow inlet, the 1 input pressurized air of two-chamber power-assisted relay valve by the second pipeline, promptly can realize control to the second compressed air stream import and export 4,5 in the same old way, promptly can give trailer braking valve input instruction air-flow, still can realize brake control trailer.The drag get out of hand of main back wheels of vehicle then when article one pipeline breaks down, but, promptly realize drag control to trailer owing to the 3rd pipeline arranged to main car front-wheel and the two-chamber power-assisted relay valve second instruction airflow inlet.

In a word, no matter that pipeline breaks down and all can ensure brake control to trailer, has improved running safety.

Claims (7)

1, a kind of two-chamber power-assisted relay valve, comprise that inside has the column type tube chamber of boss ring, the shell of lower ending opening, in the middle part of it is characterized by in the described chamber and bottom is fixed with the interior platform ring of two upper end bands up and down, the inboard, bottom is fixed with the cylindricality cylinder barrel that seals slipping ring, and inside respectively is set with a upper end and has diameter greater than valve shelves tube interior platform ring diameter wing limit and that be fixed with retracing spring together between the sealing slipping ring, and described tube chamber is divided into upper and lower two independent cavity; Have the first instruction gas port on the housing in described pillar buoy chamber from top to bottom in proper order, the first compressed air stream inlet, outlet and the second instruction gas port, second compressed air stream are imported and exported, and described first and second compressed air stream import is connected with the formed space of valve shelves tube with described cylindricality cylinder barrel; The center that is fixed with in the described upper chamber has the relay piston that can seal slip along inner wall surface thereof of the tube of falling the oral pillar, and its tube of falling the oral pillar is corresponding with the garden platform ring anchor ring of described upward valve shelves tube; In described lower chambers, fix one with its wall sealing piston that slide, the hollow stock of center band, the upper end of its hollow core stock has the venting eyelet and is inserted in the described tube of falling the oral pillar, and its lower end is then corresponding with the garden platform ring anchor ring of described lower valve shelves tube; Described two pistons are divided into upper and lower separate chamber the open air chamber of first and second sealed air chamber and first and second respectively, and wherein said first and second instruction airflow orifice is then opened on the housing in first and second sealed air chamber.

2, a kind of two-chamber power-assisted relay valve as claimed in claim 1 is characterized by the side wall surface of the described first instruction airflow orifice at described shell.

3, a kind of two-chamber power-assisted relay valve as claimed in claim 1 is characterized by between the bulge loop of described relay piston with tube chamber mesospore and is fixed with piston reset spring.

4, a kind of two-chamber power-assisted relay valve as claimed in claim 1, the end face that it is characterized by described relay piston is a concave panel.

5, a kind of two-chamber power-assisted relay valve as claimed in claim 1, the shell that it is characterized by the column casing of described relay piston is a platform shape shape.

6, a kind of two-chamber power-assisted relay valve as claimed in claim 1, the bottom enclosure that it is characterized by described hollow stock piston is a platform shape shape.

7, utilize the drag pipeline system of the described dual-chamber brake of claim 1; for wet air tank behind four-loop protection valve respectively with main air reservoir and the trailer relay valve that is communicated with trailer air tank and brake repair room by pipeline connection, it is characterized by from three pipelines of main air reservoir output:

Article one, pipeline is after pin is stepped on brake activation valve, as the first instruction compression air-flow, the first instruction airflow orifice connection together of dual-chamber brake;

The second pipeline is communicated with main back wheels of vehicle brake repair room after first compressed air stream of described two-chamber power-assisted relay valve is imported and exported.

Article three, pipeline is after pin is stepped on brake activation valve; the second instruction admission port with main car front wheel brake chamber and two-chamber power-assisted relay valve is communicated with respectively; the described pipeline that is connected in loop protection valve and trailer relay valve; after second compressed air stream import and export connection with the two-chamber power-assisted relay valve, be communicated with the instruction air-flow input port of described trailer braking valve again.

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