阅读说明：本技术 气助式后处理取气系统 (Gas-assisted post-treatment gas taking system ) 是由 孙立州 刘光喜 范武德 吴玉姣 付莹 于 2019-10-25 设计创作，主要内容包括：本发明涉及气助式后处理取气系统,为解决现有气顶油制动系统制动后排气浪费的问题；提供一种气助式后处理取气系统,包括空气泵、与空气泵连接的后处理用气罐、与后处理用气罐连接的气助式后处理系统,其特征在于还包括与空气泵连接的制动用气罐、与制动用气罐连接的制动阀、制动排气回收阀,所述制动排气回收阀的进气口与所述制动阀的排气口相连,所述制动排气回收阀的回收排气口与后处理用气罐连接。在本发明中,解除制动时,通过制动阀进入到制动阀与加力器之间气路中压缩空气通过制动排气回收阀进入到后处理用气罐,对气助式后处理系统用气进行补充。这不仅回收了制动排气,节约了能源,同时还避免了制动阀向大气中排压缩空气所产生的噪声。(The invention relates to an air-assisted post-treatment air extraction system, which aims to solve the problem of exhaust waste after braking of the conventional air-supported oil braking system and provides air-assisted post-treatment air extraction systems, which comprise an air pump, a post-treatment air tank connected with the air pump and an air-assisted post-treatment system connected with the post-treatment air tank.)

The air-assisted aftertreatment air intake system comprises an air pump, an air tank for aftertreatment connected with the air pump, and an air-assisted aftertreatment system connected with the air tank for aftertreatment, and is characterized by further comprising an air tank for braking connected with the air pump, a brake valve connected with the air tank for braking, and a brake exhaust recovery valve, wherein an air inlet of the brake exhaust recovery valve is connected with an air outlet of the brake valve, and a recovery air outlet of the brake exhaust recovery valve is connected with the air tank for aftertreatment.

2. The air-assisted aftertreatment air intake system of claim 1, wherein the brake exhaust recovery valve is a two-position three-way valve, a third air port of the brake exhaust recovery valve is communicated with the atmosphere, the air inlet is communicated with the left control end, the air inlet is communicated with the recovery exhaust port when the brake exhaust recovery valve is in the left position, and the air inlet is communicated with the third air port when the brake exhaust recovery valve is in the right position.

3. The air-assisted aftertreatment air extraction system of claim 2, wherein the recovery exhaust port of the brake exhaust recovery valve is in communication with a right control end of the brake exhaust recovery valve.

4. An air-assisted aftertreatment air intake system according to claim 2 or 3, wherein the brake exhaust gas recovery valve comprises a one-way valve, and when the brake exhaust gas recovery valve is in the left position, the air inlet is communicated to the recovery exhaust port in one way through the one-way valve.

5. The air-assisted aftertreatment air intake system of claim 1, wherein the brake exhaust recovery valve is composed of a check valve and an air-controlled switch valve, an air inlet end and an air outlet end of the check valve correspond to an air inlet and a recovery exhaust port of the brake exhaust recovery valve respectively, the air inlet end and a control end of the air-controlled switch valve are connected and communicated with the air inlet end of the check valve, the air outlet end of the air-controlled switch valve is communicated with the atmosphere, and the air-controlled switch valve is turned off when the control end pressure of the air-controlled switch valve is greater than a preset value.

6. An air-assisted aftertreatment air induction system according to claim 1 wherein the brake valve is a dual circuit brake valve.

7. The gas-assisted aftertreatment gas extraction system of claim 6, wherein the braking gas cylinders comprise a th gas cylinder and a second gas cylinder, and wherein the two gas inlets of the dual-circuit brake valve are connected to the th gas cylinder and the second gas cylinder, respectively.

8. The gas-assisted aftertreatment gas extraction system of claim 7, wherein the aftertreatment gas tank is cylindrical with a flat end, the th and second gas tanks are each cylindrical with a end being a flat circle and the other end being a hemisphere, the diameters of the flat circular ends of the th and second gas tanks are equal to the diameter of the aftertreatment gas tank, the th, aftertreatment and second gas tanks are arranged in order in the axial direction and the th and second gas tanks are welded to the aftertreatment gas tanks, respectively.

Technical Field

The invention relates to post-treatment systems, in particular to a gas-assisted post-treatment gas taking system.

Background

At present, the emission of engineering machinery is upgraded, different manufacturers adopt different technical routes to meet the requirements of regulations, wherein parts of post-treatment routes of engine manufacturers adopt an air-assisted urea injection system, urea liquid is atomized under the injection of compressed air, and the use efficiency of the urea liquid is improved.

In the pneumatic oil braking system, high-pressure air enters an assistor through a brake valve during braking, the assistor outputs brake fluid to drive a brake to brake, and when the brake is released, the compressed air entering the assistor is directly exhausted into the atmosphere, and the compressed air exhausted from the brake valve has pressure and is directly exhausted into the atmosphere, so that energy loss is caused.

Disclosure of Invention

The invention aims to solve the technical problem that the exhaust is wasted after the existing gas cap oil braking system brakes, and provides gas-assisted aftertreatment gas extraction systems so as to exhaust after the gas cap oil braking system brakes and achieve the purpose of saving energy.

The invention provides air-assisted post-treatment air intake systems, which comprises an air pump, a post-treatment air tank connected with the air pump, and an air-assisted post-treatment system connected with the post-treatment air tank, and is characterized by also comprising a braking air tank connected with the air pump, a brake valve connected with the braking air tank, and a braking exhaust gas recovery valve, wherein the air inlet of the braking exhaust gas recovery valve is connected with the exhaust port of the brake valve, and the recovery exhaust port of the braking exhaust gas recovery valve is connected with the post-treatment air tank.

The air-assisted post-treatment air intake system comprises a brake exhaust recovery valve, a brake exhaust recovery valve, a one-way exhaust valve and a one-way exhaust valve, wherein the brake exhaust recovery valve is a two-position three-way valve, a third air port of the brake exhaust recovery valve is communicated with the atmosphere, an air inlet of the brake exhaust recovery valve is communicated with a recovery exhaust port when the brake exhaust recovery valve is in a left position, and the air inlet of the brake exhaust recovery valve is communicated with the third air port when the brake exhaust recovery valve is in the right position.

In the above air-assisted post-treatment air intake system, the brake exhaust gas recovery valve may also take other forms so as to guide the brake exhaust gas to the post-treatment air tank when the pressure of the air inlet is greater than or has a recovery value, and release the brake exhaust gas to the atmosphere when the pressure of the brake exhaust gas is lower than a predetermined value or has no recovery value, for example, the brake exhaust gas recovery valve may be composed of a check valve and a pneumatic control switch valve, an air inlet end and an air outlet end of the check valve respectively correspond to an air inlet and a recovery exhaust outlet of the brake exhaust gas recovery valve, the air inlet end and the control end of the pneumatic control switch valve are connected and communicated with the air inlet end of the check valve, the air outlet end of the pneumatic control switch valve is communicated with the atmosphere, the pneumatic control switch valve is closed when the pressure of the pneumatic control switch valve is greater than a predetermined value, that is, the pneumatic control switch valve is closed when the pressure of the air inlet is greater than the predetermined value, the brake exhaust gas is guided to the post-treatment air.

In the air-assisted aftertreatment air intake system, the brake valve is a double-loop brake valve, the air tank for braking comprises a th air tank and a second air tank in steps, two air inlets of the double-loop brake valve are respectively connected with a th air tank and the second air tank, and the th air tank and the second air tank can respectively supply air to front axle braking and rear axle braking of a vehicle through the double-loop brake valve, so that the reliability of the brake system is improved.

In the above-mentioned gas-assisted aftertreatment gas extraction system, the gas pitcher for aftertreatment is that the tip is planar cylindrical, gas pitcher and second gas pitcher all are that end is planar circular and end is hemispherical cylindrical in addition, the diameter of the planar circular end of gas pitcher and second gas pitcher equals the diameter of the gas pitcher for aftertreatment, gas pitcher, gas pitcher for aftertreatment and second gas pitcher are arranged in proper order in axial direction and the planar circular end of gas pitcher and second gas pitcher welds with the gas pitcher for aftertreatment respectively.

Compared with the prior art, the invention has the advantages that the brake exhaust recovery valve enters the post-treatment gas tank when the brake is released, the air is used for supplementing the gas for the air-assisted post-treatment system, the energy is saved, the noise generated by the compressed air discharged to the atmosphere by the brake valve is avoided, the frequent operation time of the air pump is shortened, and the service life of the air pump is prolonged.

Drawings

FIG. 1 is a schematic diagram of the gas-assisted aftertreatment gas extraction system of the present invention.

Detailed Description

The following description of the embodiments refers to the accompanying drawings.

As shown in fig. 1, the air-assisted post-treatment air intake system in the present embodiment includes an air pump 1, a post-treatment air tank 3 connected to the air pump 1, an air-assisted post-treatment system 8 connected to the post-treatment air tank 3, a braking air tank connected to the air pump 1, a brake valve 7 connected to the braking air tank, and a brake exhaust recovery valve 6.

The brake air tank comprises a th air tank 4 and a second air tank 5, the brake valve 7 is a double-loop foot brake valve, a th brake compressed air output port of the double-loop foot brake valve is connected with the front axle brake assembly 9, a second brake compressed air output port is connected with the rear axle brake assembly 10, the front axle brake assembly 9 and the front axle brake assembly 10 both comprise an assistor connected with the double-loop foot brake valve and a brake connected with the assistor, and two air inlets of the double-loop foot brake valve are respectively connected with the th air tank 4 and the second air tank 5.

The air pump 2 is connected with the th air tank 4, the second air tank 5 and the post-treatment air tank 3 through the air charging assembly 2, and the air charging assembly 2 comprises a pressure regulating valve, a filter, a dryer and other components so as to carry out dehumidification, dust removal and pressure regulation on compressed air entering the air tanks, so that the compressed air entering the brake air tank and the post-treatment air tank 3 are different and respectively accord with the application requirements of the air charging assembly and the post-treatment air tank.

When the brake exhaust recovery valve is in the left position, the air inlet is communicated with the recovery exhaust outlet, and when the brake exhaust recovery valve is in the right position, the air inlet is communicated with the recovery exhaust outlet, and when the brake exhaust recovery valve is in the exhaust initial stage when the brake is released, the exhaust pressure is higher than the pressure in the post-treatment air tank, the brake exhaust recovery valve controls to open the brake exhaust recovery valve through the pressure of the air inlet, so that high-pressure brake exhaust with recovery value enters the post-treatment air tank.

In this embodiment, the post-treatment gas tank, the th gas tank, and the second gas tank constitute a three-segment integrated gas tank, wherein the post-treatment gas tank is located at an intermediate position, the post-treatment gas tank is cylindrical and has both end portions being flat, the th gas tank and the second gas tank are located at both ends of the post-treatment gas tank, the th gas tank and the second gas tank are both cylindrical in which the end is flat circular and the end is hemispherical, the diameters of the flat circular ends of the th gas tank and the second gas tank are equal to those of the post-treatment gas tank, the th gas tank, the post-treatment gas tank, and the second gas tank are arranged in order in the axial direction, and the flat circular ends of the th gas tank and the second gas tank are welded to the post-treatment gas tank, respectively.

The invention enters the brake exhaust recovery valve into the post-treatment gas tank when the brake is released, is used for supplementing gas for the gas-assisted post-treatment system, saves energy, simultaneously avoids noise generated by the compressed air discharged to the atmosphere from the brake valve, reduces the frequent operation time of the air pump and prolongs the service life of the air pump.