CN201201600Y

CN201201600Y - Adjustable emergency synchronous relay valve

Info

Publication number: CN201201600Y
Application number: CNU2008201192352U
Authority: CN
Inventors: 屠程鑫
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-01
Filing date: 2008-06-20
Publication date: 2009-03-04
Anticipated expiration: 2018-06-20

Abstract

The utility model discloses an adjustable emergency synchronous relay valve capable of realizing pressure adjustment, which comprises an upper valve body, a lower valve body in sealed engagement with the upper valve body, a control port on the upper valve body, and an air inlet mechanism and an air outlet which are arranged on the lower valve body. A piston is arranged on the upper portion of the middle of the lower valve body, the periphery of the piston is provided with a spacer disc, a cavity is arranged between the spacer disc and the piston, an emergency piston is arranged under the piston at the middle of the lower valve body, a valve seat is arranged in an inner cavity of the lower portion of the emergency piston, the valve seat is internally provided with a valve, one side of the lower valve body is provided with a pressure regulating valve, and the pressure regulating valve is communicated with the air outlet. The utility model is adaptable to emergent synchronous braking for multi-axle trailers and semi-trailers.

Description

Adjustable urgent relay valve synchronously

Technical field

The utility model relates to a kind of brake equipment, relates in particular to a kind of urgent relay valve synchronously that is used for the adjustable in pressure on many bridges trailer, the superimposed trailer vehicle.

Background technology

At present, at common many bridges trailer, urgent relay valve synchronously on the superimposed trailer vehicle comprises upper valve body, the following valve body that is sealed and matched with upper valve body, upper valve body one side is provided with and controls the control mouth that source of the gas is connected, following valve body is provided with the admission port that links to each other with the air feed source of the gas, air supply opening that is connected with air receiver and the air extractor duct that links to each other with brake system, following valve body middle upper portion is provided with the little piston in big bottom, top, be provided with emergency piston under the following valve body intermediate piston, the emergency piston inner chamber is provided with valve seat, be provided with valve in the valve seat, by admission port and air supply opening, make supply air line come pressurized air to enter air receiver, work as glancing impact, the pressurized air of coming from pilot piping enters from the control mouth, acts on piston top, piston is moved down close exhaust clearance, and open the air inlet gap, the pressurized air in air receiver arrives air extractor duct from air supply opening through the air inlet gap, because the gas pressure of air extractor duct is in the less piston bottom of area, thereby output pressure increases fast, thereby plays brake action; And when brake off, control mouthful exhaust, the air pressure of air extractor duct makes and moves on the piston, thereby opens exhaust clearance, closes the air inlet gap, and opens valve, makes air extractor duct air pressure through valve and exhausr port exhaust to atmosphere.The deficiency that this urgent relay valve synchronously exists is: because the output pressure of air extractor duct size is recently determined by the piston upper end and the area of small end, and the size of piston upper and lower side is changeless, thereby the output pressure of air extractor duct also is invariable, in order to play braking effect preferably, the size of braking force is that the vehicle by rated load, nominal load carries out design-calculated, and in fact, when vehicle during in zero load, because load is less, if the braking force when still adopting rated load, nominal load is bound to vehicle is produced harmful effect.

The utility model content

Technical problem to be solved in the utility model provides a kind of pressure controlled urgent relay valve synchronously of realizing.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model comprises upper valve body, the following valve body that is sealed and matched with upper valve body, described upper valve body one side is provided with and controls the control mouth that source of the gas communicates, described valve body down is provided with admission gear and air extractor duct, described valve body middle upper portion down is provided with piston, described piston periphery is provided with every dish, described every the dish and piston between be provided with cavity, be provided with emergency piston under the valve body intermediate piston under described, emergency piston top inner chamber is stretched in described piston bottom, described emergency piston lower lumen is provided with valve seat, be provided with valve in the described valve seat, described valve body one side down is provided with pressure regulating valve, and described pressure regulating valve is connected with cavity and air extractor duct.

Because the utility model is provided with pressure regulating valve in following valve body one side, make pressure regulating valve and be connected with cavity and air extractor duct between the piston every dish, by the pressure of adjusting pressure regulating valve, thereby make the delivery pressure of air extractor duct adjustable.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is that the A-A of Fig. 1 is to cut-away view.

The specific embodiment

Below in conjunction with the drawings and the specific embodiments the utility model is described in further detail:

Extremely shown in Figure 2 as Fig. 1, the utility model comprises upper valve body 1, the following valve body 2 that is connected with upper valve body 1, upper valve body 1 one sides are provided with control mouth 3, control mouth 3 is connected with the control source of the gas, following valve body 2 one sides are provided with admission port 4, admission port 4 is connected with the air feed source of the gas, following valve body 2 opposite sides are provided with air supply opening 5, air supply opening 5 is connected with air receiver, following valve body 2 belows are provided with a plurality of air extractor ducts 6, air extractor duct 6 is connected with brake system, be provided with piston 7 at following valve body 2 middle upper parts, piston 7 is up big and down small structure, piston 7 peripheries are provided with every dish 8, present little macrostructure down every dish 8, between dish 8 and piston 7, be provided with cavity 9, be provided with emergency piston 10 under the piston 7, emergency piston 10 is presented little macrostructure down, emergency piston 10 top inner chambers are stretched in described piston 7 bottoms, emergency piston 10 intermediate pistons 7 belows are provided with valve seat 11, be provided with valve 12 in the valve seat 11, be provided with exhaust clearance 13 between piston 7 bottoms and valve 12 upper surfaces, be provided with the gap between valve seat 11 and the valve 12, valve seat 11 peripheries are provided with valve spring 14, and valve spring 14 is connected with valve 12 upper ends, and valve 12 is moved up and down, close or the unlatching effect thereby play, emergency piston 10 lower, outer perimeter are provided with lining 15, and lining 15 peripheries are sealed and matched with following valve body 2, and lining 15 belows are provided with spring perch 16, spring perch 16 is provided with exhausr port 17, and exhausr port 17 places also are provided with dustproof sheet 18; Be provided with pressure gap 19 between emergency piston 10 and the following valve body 2, pressure gap 19 is connected with admission port 4, emergency piston 10 is provided with air inlet gap 20 with valve 12 upper surfaces, is provided with inlet chamber 21 between emergency piston 10 peripheries and following valve body 2 inner chambers, and inlet chamber 21 is connected with air inlet gap 20; Following valve body 2 one sides are provided with pressure regulating valve 25, and pressure regulating valve 25 is connected with cavity 9 and air extractor duct 6.

Working process of the present utility model is as follows:

The pressurized air of coming from the air feed source of the gas is entered by admission port 4, enter inlet chamber 19 by check valve, and charge into air receiver through air inlet gap 20 and air supply opening 5, when taking place that tractor truck breaks off relations or supply air line breaks, check valve is closed under air supply opening 5 pressure effects, air pressure can not be discharged from admission port 4, simultaneously emergency piston 10 is used at pressure and is moved, thereby open air inlet gap 20, close exhaust clearance 13, make the pressurized air of air supply opening 5 enter brake repair room by air extractor duct 6, thereby realize autobrake through air inlet gap 20.

When the vehicle normal load, make pressure regulating valve be in closed condition, the pressurized air of coming from pilot piping enters from control mouth 3, act on piston 7 tops, piston 7 is moved down close exhaust clearance 13, and open air inlet gap 20, pressurized air in air receiver 20 arrives air extractor ducts 6 from air supply opening 5 through the air inlet gap, because the cavity 9 between dish 8 and piston 7 is in closed condition with air extractor duct 6, air pressure in the cavity 9 communicates with exhausr port 17 through piston 7, exhaust to atmosphere, actual piston 7 lower reaction areas are much smaller than piston 7 top areas, and the gas pressure of air extractor duct 6 is in less piston 7 bottoms of area, thereby output pressure increases fast, thereby plays good brake action.

And when vehicle load is light, the pressurized air of coming from pilot piping enters from control mouth 3, act on piston 7 tops, piston 7 is moved down close exhaust clearance 13, and open air inlet gap 20, pressurized air in air receiver 20 arrives air extractor ducts 6 from air supply opening 5 through the air inlet gap, by regulating the opening of pressure regulating valve 25, make the air pressure part of the cavity 9 between dish 8 and piston 7 enter air extractor duct 6, thereby the practical function area of piston 7 bottoms increases, thereby output pressure is reduced, reduced braking force thereby compare with normal load.

Claims

1, a kind of adjustable urgent relay valve synchronously, comprise upper valve body, the following valve body that is sealed and matched with upper valve body, described upper valve body one side is provided with and controls the control mouth that source of the gas communicates, described valve body down is provided with admission gear and air extractor duct, described valve body middle upper portion down is provided with piston, described piston periphery is provided with every dish, described every the dish and piston between be provided with cavity, be provided with emergency piston under the valve body intermediate piston under described, emergency piston top inner chamber is stretched in described piston bottom, described emergency piston lower lumen is provided with valve seat, be provided with valve in the described valve seat, it is characterized in that described valve body one side down is provided with pressure regulating valve, described pressure regulating valve is connected with cavity and air extractor duct.