CN202732050U - Ammonia concentration control device of car urea tank filler pipe orifice - Google Patents

Abstract

The utility model relates to an ammonia concentration control device of a car urea tank filler pipe orifice. An inlet control valve and a working vent valve are mounted at the upper part of an urea tank body; an outlet of the inlet control valve is located in a box body cavity and provided with a self-closing valve; an inlet of the inlet control valve is connected with a urea filler pipe; a trumpet-shaped filler pipe orifice is formed at the upper end of the urea filler pipe; an outlet of the working vent valve is connected with a working vent pipe; a turnover stop valve is mounted on the top wall of the box body; a pressure retaining valve is mounted at the outlet of the turnover stop valve; and the pressure retaining valve is used for starting to vent when the pressure is higher than the preset starting pressure, and automatically cutting off when the pressure is lower than the preset closing pressure. Under the non-filling situation, the ammonia concentration and the pressure are both low, the ammonia is slowly discharged through the working vent valve, and the pressure retaining valve is at the closed status; when the urea solution is filled, the ammonia pressure is quickly raised to enable the pressure retaining valve to open and quickly release ammonia; the pressure retaining valve is far away from the urea filler pipe orifice, the ammonia concentration around the filler pipe orifice is relatively low, so that the ammonia cannot damage the health of the filling person.

Description

Automobile urea box filling mouth of pipe ammonia concentration control gear

Technical field

The utility model relates to a kind of automobile urea box, particularly a kind of automobile urea box filling mouth of pipe ammonia concentration control gear.

Background technique

Enhancing along with global environmental protection consciousness; relevant policy and rules have proposed stricter requirement to automobile main frame maker; particularly more and more stricter to the emission request of nitrogen oxide in the vehicle exhaust; enforcement along with EURO 6; the emission limit of nitrogen oxide is 0.07g/km, meet this requirement, with regard to present controlling method; each assembly plant mainly adopts selective catalytic reduction system operating (Selective Catalytic Reduction), i.e. SCR system.Utilize this system that automobile-used urea liquid is sprayed into offgas duct and NO _XChemical reaction occurs, and finally is converted into the nitrogen G﹠W and discharges.So the SCR system can solve exhaust gas from diesel vehicle NO effectively _XEmission problem, but need to use urea liquid in the SCR system, and this solution can resolve into the toxic gas-ammonia with penetrating odor.

Be applied to now SCR urea box storage system on the car body in filling during urea liquid, the certain density ammonia of the inner savings of urea box can directly be discharged in the air by the filling mouth of pipe of opening, the corrosive action that not only can produce some parts around the vehicle body is carried out the healthy of urea filling staff but also may endanger.

The model utility content

The purpose of this utility model is, overcomes problems of the prior art, and a kind of automobile urea box filling mouth of pipe ammonia concentration control gear is provided, so that in the urea box during filling urea liquid, the ammonia concentration around the filling mouth of pipe is lower.

For solving above technical problem, a kind of automobile urea box filling mouth of pipe ammonia concentration control gear provided by the utility model, urea box casing top is equipped with inlet control valve and work outlet valve, the outlet of described inlet control valve is positioned at cabinets cavity and is provided with self-closing valve, the entrance of described inlet control valve is connected with the urea filler pipe, the upper end of described urea filler pipe is provided with the flaring filling mouth of pipe, the outlet of described work outlet valve is connected with the work outlet pipe, on the described casing roof upset cut-off valve is installed, the outlet of described upset cut-off valve is equipped with pressure retaining valve, described pressure retaining valve is set with engaging pressure and is higher than the setting cracking pressure opens exhaust, is lower than the setting closing pressure and automatically cuts off.

With respect to prior art, the utility model has been obtained following beneficial effect: the outlet of inlet control valve is provided with self-closing valve, when the urea rifle is inserted into the filling mouth of pipe in the urea box during filling urea liquid, the self-closing valve of import barrier valve outlet port is opened, the urea liquid complete rear self-closing valve autoshutdown of annotating, the ammonia concentration and the pressure that accumulate in the urea box of non-filling state is lower at ordinary times, slowly discharges by the work outlet valve, and pressure retaining valve did not reach cracking pressure and was in closed condition this moment; When inserting urea rifle filling urea liquid, produce rapidly a large amount of ammonias in the short time, concentration and the pressure of ammonia raise rapidly, in case reach the cracking pressure of pressure retaining valve, this moment, pressure retaining valve was opened rapid release ammonia; The upset cut-off valve normally is in opening state, when the vehicle then autoshutdown that topples; Because pressure retaining valve and the urea filling mouth of pipe is distant, thereby the ammonia concentration around the filling mouth of pipe is lower, can not damage filling personnel's health.

As preferred version of the present utility model, described upset cut-off valve comprises suction chamber spaced apart from each other and exhaust chamber, described suction chamber inserts in the described urea box casing, described exhaust chamber is positioned at the suction chamber top, be provided with suitable upset in the described suction chamber and cut off spool and upset cut-out valve seat, described upset is cut off spool and is positioned at described upset cut-out valve seat below, the central upper portion that valve seat is cut off in described upset is provided with the air hole of linking up suction chamber and exhaust chamber, the both sides of described air hole are respectively equipped with partition, described partition is separated out the liquid storage chamber with the bottom of described exhaust chamber, the diapire of described liquid storage chamber is provided with the return port of linking up exhaust chamber and suction chamber, and the reflux valve of opening or cutting out according to the pressure size is installed in the described return port.Under the normal state, upset is cut off spool lower, upset is cut off valve seat upper, both are in separated state, gas in the casing can enter exhaust chamber by air hole, if vehicle topples, the urea box roof down, upset is cut off spool and is fallen into upset by means of deadweight and cut off valve seat and realize sealing; Under the travelling state, gas is not only arranged through the air hole discharging, a small amount of drop is because vehicle rocks the partition that also can cross air hole and air hole both sides, enter the liquid storage chamber, when the liquid in the liquid storage chamber reach a certain height, the pressure of liquid promoted descending the opening of reflux valve spool, and the liquid that accumulates flows back in the casing by return port, the pressure of reflux valve spool top disappears after liquid has flowed, and resets under the tension force effect of spring return port is closed again.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail, accompanying drawing only provides reference and explanation usefulness, and is non-in order to limit the utility model.

Fig. 1 is the structural representation of the utility model automobile urea box filling mouth of pipe ammonia concentration control gear.

Fig. 2 is the structural representation of upset cut-off valve among Fig. 1.

Among the figure: 1. casing; 2. inlet control valve; 3. urea filler pipe; 3a. the filling mouth of pipe; 4. work outlet valve; 5. work outlet pipe; 6. upset cut-off valve; 6a. suction chamber; 6b. exhaust chamber; 6c. spool is cut off in upset; 6d. valve seat is cut off in upset; 6e. air hole; 6f. partition; 6g. liquid storage chamber; 6h. reflux valve; 7. pressure retaining valve.

Embodiment

As shown in Figure 1, the utility model automobile urea box filling mouth of pipe ammonia concentration control gear, urea box casing 1 top is equipped with inlet control valve 2 and work outlet valve 4, the outlet of inlet control valve 2 is positioned at cabinets cavity and is provided with self-closing valve, the entrance of inlet control valve 2 is connected with urea filler pipe 3, the upper end of urea filler pipe 3 is provided with flaring filling mouth of pipe 3a, the outlet of work outlet valve 4 is connected with work outlet pipe 5, upset cut-off valve 6 is installed on the casing roof, the outlet of upset cut-off valve 6 is equipped with pressure retaining valve 7, pressure retaining valve 7 is similar to the structure of safety valve, regulate the spring tension of pressure retaining valve and then can set its engaging pressure, be higher than the setting cracking pressure, the pressure retaining valve spool overcomes spring tension and is backed down exhaust, be lower than the setting closing pressure, then the pressure retaining valve spool resets under the spring tension effect and again closes.

As shown in Figure 2, upset cut-off valve 6 comprises suction chamber 6a spaced apart from each other and exhaust chamber 6b, suction chamber 6a inserts in the urea box casing, exhaust chamber 6b is positioned at suction chamber 6a top, be provided with suitable upset among the suction chamber 6a and cut off spool 6c and upset cut-out valve seat 6d, upset is cut off spool 6c and is positioned at upset cut-out valve seat 6d below, the central upper portion that valve seat 6d is cut off in upset is provided with the air hole 6e that links up suction chamber 6a and exhaust chamber 6b, the both sides of air hole 6e are respectively equipped with partition 6f, partition 6f is separated out liquid storage chamber 6g with the bottom of exhaust chamber 6b, the diapire of liquid storage chamber 6g is provided with the return port of linking up exhaust chamber 6b and suction chamber 6a, and the reflux valve 6h that opens or close according to the pressure size is installed in the return port.Under the normal state, upset is cut off spool 6c lower, upset is cut off valve seat 6d upper, both are in separated state, gas in the casing can enter exhaust chamber 6b by air hole 6e, if vehicle topples, the urea box roof down, upset is cut off spool 6c and is fallen into upset by means of deadweight and cut off valve seat 6d and realize sealing; Under the travelling state, gas is not only arranged through air hole 6e discharging, a small amount of drop is because vehicle rocks the partition 6f that also can cross air hole 6e and air hole both sides, enter liquid storage chamber 6g, when the liquid among the 6g of liquid storage chamber reach a certain height, the pressure of liquid promoted descending the opening of reflux valve spool, and the liquid that accumulates flows back in the casing by return port, the pressure of reflux valve spool top disappears after liquid has flowed, and resets under the tension force effect of spring return port is closed again.

When the urea rifle is inserted into filling mouth of pipe 3a in the urea box during filling urea liquid, the self-closing valve of inlet control valve 2 outlets is opened, the urea liquid complete rear self-closing valve autoshutdown of annotating, the ammonia concentration and the pressure that accumulate in the urea box of non-filling state is lower at ordinary times, slowly discharges by work outlet valve 4, at this moment pressure retaining valve 7 does not reach cracking pressure and is in closed condition; When inserting urea rifle filling urea liquid, produce rapidly a large amount of ammonias in the short time, concentration and the pressure of ammonia raise rapidly, in case reach the cracking pressure of pressure retaining valve 7, this moment, pressure retaining valve 7 was opened rapid release ammonia; Because pressure retaining valve 7 is distant with urea filling mouth of pipe 3a's, thereby the ammonia concentration around the filling mouth of pipe is lower, can not damage filling personnel's health.

The above only is the better possible embodiments of the utility model, and is non-so limit to scope of patent protection of the present utility model.In addition to the implementation, the utility model can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.

Claims (2)

1. automobile urea box filling mouth of pipe ammonia concentration control gear, urea box casing top is equipped with inlet control valve and work outlet valve, the outlet of described inlet control valve is positioned at cabinets cavity and is provided with self-closing valve, the entrance of described inlet control valve is connected with the urea filler pipe, the upper end of described urea filler pipe is provided with the flaring filling mouth of pipe, the outlet of described work outlet valve is connected with the work outlet pipe, it is characterized in that: on the described casing roof upset cut-off valve is installed, the outlet of described upset cut-off valve is equipped with pressure retaining valve, described pressure retaining valve is set with engaging pressure and is higher than the setting cracking pressure opens exhaust, is lower than the setting closing pressure and automatically cuts off.

2. automobile urea box according to claim 1 filling mouth of pipe ammonia concentration control gear, it is characterized in that: described upset cut-off valve comprises suction chamber spaced apart from each other and exhaust chamber, described suction chamber inserts in the described urea box casing, described exhaust chamber is positioned at the suction chamber top, be provided with suitable upset in the described suction chamber and cut off spool and upset cut-out valve seat, described upset is cut off spool and is positioned at described upset cut-out valve seat below, the central upper portion that valve seat is cut off in described upset is provided with the air hole of linking up suction chamber and exhaust chamber, the both sides of described air hole are respectively equipped with partition, described partition is separated out the liquid storage chamber with the bottom of described exhaust chamber, the diapire of described liquid storage chamber is provided with the return port of linking up exhaust chamber and suction chamber, and the reflux valve of opening or cutting out according to the pressure size is installed in the described return port.

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