JPH035600Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention applies pressure from vehicle exhaust gas to the loading tank of a tank lorry, making it possible to discharge the cargo in the tank. This invention relates to an exhaust gas pumping device for a tank lorry.

[Purpose of the invention] Generally, when slurry is loaded onto a tank truck and transported, the water on the surface of the slurry may evaporate and dry. Furthermore, when the slurry is discharged, the slurry liquid level and the tank inner wall surface are dried due to the heat of the exhaust gas, which may cause adverse effects such as clogging in the pipe line when the slurry is discharged.

This invention was developed in view of the circumstances described above, and its outline is that a loading tank of a tank lorry is communicated with the vehicle's exhaust pipe via a branch pipe, and a first pipe is connected to the tank or branch pipe. A pressure regulating valve is directly attached, and a second pressure regulating valve having a lower set pressure than the first pressure regulating valve is attached via an opening/closing means, so that the pressure inside the tank can be adjusted in two stages. By being composed of
To provide an exhaust gas pumping device for a tank lorry, which prevents the liquid surface of slurry from drying, prevents the inner wall surface of the tank from drying, maintains product quality, and facilitates cleaning of the inside of the tank, etc. be.

[Example] An example of this invention will be described below based on the accompanying drawings.

FIG. 1 is a schematic piping diagram of the device of this invention. In the drawing, 1 is a tank for loading a tank lorry, a discharge port 2 is formed below the end of the tank 1, and the discharge port 2 is connected to a discharge valve 3. It is possible to communicate with the outside via. A relief valve 4, which is a first pressure regulating valve, is disposed in the upper part of the tank 1, and a branch pipe line branched from the branch part 5a of the exhaust pipe 5 of the vehicle is disposed in the upper part of the tank 1. The end of a flexible rubber hose 6 constituting the section is communicated via a conduit 7 which likewise constitutes a part of the branch conduit. Conduit 7
A relief valve 9 which is a second pressure regulating valve whose pressure is regulated to be lower than that of the relief valve 4 via a two-way valve 8 is disposed above the pressure relief valve 9 . In addition, a two-way valve 10 is installed in the connecting part of the pipe line 7 with the tank 1, and a check valve 11 that is opened only in the direction of the tank 1 is installed in the middle of the pipe line 7.
A humidifying cooler 12 is installed near the connecting portion with the rubber hose 6. A relief valve 13 is provided in the pipe line 7 between the humidification cooler 12 and the rubber hose 6.
A pressure gauge 14 and a two-way valve 15 are respectively provided. In addition, the pipe line 7 on the tank 1 side of the humidifying cooler 12
can be communicated with the outside via a two-way valve 16.
A muffler 17 is disposed on the engine side of the branch part 5a of the exhaust pipe 5, and a spark preventer 18 is disposed on the branch part 5a side, and a two-way valve 19 is disposed on the discharge side of the branch part 5a of the exhaust pipe 5. will be placed.

FIG. 2 is a partial piping diagram showing another embodiment of the device of this invention, which is almost the same as the embodiment shown in FIG. 1, except for the relief valve which is the second pressure regulating valve. 9 is attached to the upper part of the tank 1 via a two-way valve 10 instead of being attached to the pipe line 7, and the other configuration is the same as that shown in the first figure. The same reference numerals are given to the members and their explanations are omitted. The device shown in the second figure also has the same effects as the device shown in the first figure, which will be described later.

[Operation] Since the device of this invention is as described above, when the slurry A in the tank 1 is forced to the outside, the relief valve 13 is closed after both the two-way valves 15 and 19 are closed. After confirming the set relief pressure that has been adjusted using the pressure gauge 14, the two-way valve 15 is gradually opened, and the two-way valve 10 is also opened. Enter tank 1 in a humid state, and
Pressurize the inside. When the discharge valve 3 is opened, the slurry that is the load is discharged to the outside from the discharge port 2. Note that when the internal pressure of the tank 1 exceeds a set value, the pressure is regulated by the relief valve 4.

Also, when the tank lorry is traveling, the inside of the tank 1 can be pressurized to a constant pressure, but in this case, the two-way valve 8 is opened, the relief valve 9 is adjusted, and then the two-way valve 15 is closed. Then, the two-way valve 19 is opened. (However, both the two-way valves 10 and 8 are in an open state.) Thereby, the inside of the tank 1 is maintained at the set pressure of the relief valve 9 which is lower than the set pressure of the relief valve 4.

[Effect of the invention] As described above, the exhaust gas pumping device for a tank lorry according to this invention humidifies the exhaust gas sent into the tank by the humidifying cooler when pumping the slurry inside the tank to the outside. Since the slurry is cooled and then sent into the tank, the liquid level of the slurry and the inside of the tank do not dry out, and
Since the pressure inside the tank can be maintained at a constant level while driving, the saturated vapor pressure is lowered, preventing the slurry level in the tank and the inside surface of the tank from drying out, maintaining the quality of the product inside the tank, and preventing discharge to the outside. This has the effect of preventing clogging in the piping when cleaning, and making it easier to clean the inside of the tank, etc.

[Brief explanation of the drawing]

FIG. 1 is a schematic piping diagram of the device of this invention, and FIG. 2 is a partial schematic piping diagram of another embodiment of the device of this invention. In the drawings, 1...Tank, 2...Discharge port, 3...Discharge valve, 4...Relief valve (first pressure regulating valve), 5...Exhaust pipe, 6...Rubber hose (branch pipe line), 7... Pipe line (branch pipe line),
8, 10, 15, 16, 19...Two-way valve, 9...
Relief valve (second pressure regulating valve), 11... Check valve,
12... Humidification cooler, 13... Relief valve, 14
...pressure gauge, 17...silencer, 18...spark preventer.

Claims (1)

[Scope of utility model registration request] The tank lorry's loading tank has a discharge port at the bottom of the tank and a discharge valve at the tip of the discharge port.In order to introduce exhaust gas into the loading tank of the tank lorry, the exhaust pipe branches off from the vehicle's exhaust pipe through a branch pipe. A valve that opens and closes in a reciprocal relationship with the pipe is provided, and the branch pipe is further provided with a humidifying cooler, a check valve, and a switching valve in this order to communicate with the loading tank, and the branch pipe is connected to the loading tank or the branch pipe. A first pressure regulating valve is installed in the pipeline, and a second pressure regulating valve having a lower set pressure than the first pressure regulating valve is attached via an opening/closing means, and the pressure inside the tank is adjusted in two stages. An exhaust gas pumping device for a tank lorry that is configured to be able to