Novel three-bridge emergency relay valve

Abstract

The invention discloses a novel three-bridge emergency relay valve, which comprises a valve body, a valve cover, a piston, a sealing valve, a reset spring, a valve seat, a check ring, a small spring, a sealing gasket, a check valve, a first air inlet connector, a multi-position valve rod, an adjusting rod, an adjusting connector, a clamping spring, a control handle, a fast-discharging film and a second air inlet connector. The sealing valve, the reset spring and the valve seat are sequentially installed in the valve body, and the check ring is used for fixing and positioning. The small spring, the sealing gasket and the check valve are sequentially filled in the valve body. The multi-position valve rod is installed in the valve cover, the adjusting rod is installed in the adjusting connector, the clamping spring is clamped on a clamping spring groove of the adjusting rod to perform route limiting on the adjusting rod, the control handle is further installed on the adjusting rod to form a sub-unit, and the installed sub-unit is filled in the valve cover where the multi-position valve rod is installed. The fast-discharging film is placed in a control opening end of the valve cover, the second air inlet connector is screwed on, and a third exhausting port is arranged on the second air inlet connector. The piston is arranged between the valve cover and the valve body and then the valve cover and the valve body are fixedly connected. The novel three-bridge emergency relay valve can perform exhausting fast, reduces abrasion between a braking pad and a tyre, is favorable for dragging moving of a trailer on site, simultaneously saves installation space and reduces production cost.

Description

【Technical field】 [0001] The invention relates to auto parts, in particular to a novel three-bridge emergency relay valve. 【Background technique】 [0002] The design of emergency relay valves for domestic trailers is generally taken from abroad. Existing products from abroad are imported and imitated, and they are copied without independent innovation. As a result, they encounter many patent barriers when opening up international market sales. [0003] Moreover, the general three-bridge emergency relay valves at home and abroad all have the following shortcomings: [0004] ① The control chamber of the ordinary three-axle emergency relay valve has a large volume. When the brake is released, the gas needs to be exhausted through the connecting pipeline to the trailer valve. The exhaust path is long and the exhaust speed is slow, resulting in slow start of the vehicle. At the same time, the length of the emergency relay valve of the three axles also causes the exhaust to be sl...

AI Technical Summary

Problems solved by technology

[0004] ① The control chamber of the ordinary three-axle emergency relay valve has a large volume. When the brake is released, the gas needs to be exhausted through the connecting pipeline to the trailer valve. The exhaust path is long and the exhaust speed is slow, resulting in slow start of the vehicle.

At the same time, the length of the three-axle emergency relay valve also leads to slow exhaust and premature wear of brake pads and tires.

[0005] ② After the multi-axle trailer is separated from the tractor head and the main air supply source is disconnected, the air pressure of the rear air storage tank acts on the driving chamber of the spring brake chamber through the three-axle emergency relay valve, so that the rear trailer produces parking brake, but the current form The rear trailer lacks the function of releasing the brake. Once the brake is applied, the brake cannot be released without an external air source except for emptying the air storage tank and unloading the pressure of the outlet cylinder. As a result, the air source of some tractors fails and When the rear trailer needs to be moved, the drag cannot be completed

[0006] ③Conventional three-bridge relay valve, the structure is relatively complex; the weight is heavy, about 2.64Kg; the overall space is large, and the height is about 170mm; the overall processing technology requirements for accessories are high, resulting in high product costs

[0007] ④ The product has single performance and no auxiliary functions

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