JPS5830839A - Powder and fragments discharging apparatus of haulage car therefor - Google Patents

Abstract

PURPOSE:To reduce the concentration of oxygen in exhaust gas and intend to exhaust the pulverized coal safely, by providing throttle valve in exhaust pipe which introduces engine exhaust gas into a powder and grains container tank to throttle the exhaust gas and drive the engine in a high load condition in order to prevent the explosion of power and grains. CONSTITUTION:After the pulverized coal is thrown into the powder and grains container tank 2 from a manhole 29, a switching valve 13 is opened to let an inert gas flow into said powder and grains tank 2 from an inert gas container tank 11 to prevent the pulverized coal from explosion on the way of transportation. When the pulverized coal is exhausted from a powder and grains tank 2, after a dump cylinder 3 is extended and said tank 2 has been tilted, switching valves 23, 25 are opened, then closing said valve 24, and the exhaust gas from the engine 5 is guided to flow into a discharge part 4 through an exhaust pipe 6, introducing pipe 7 and supply pipe 8. In this case, as the introducing pipe 7 is throttled by a variable throttle valve 10, the engine 5 is always operated at a high load to reduce the oxygen concentration in exhaust gas and exhaust of pulverized coal can be carried out safely.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a granular material transport vehicle that discharges dangerous granular materials such as pulverized coal using engine exhaust gas.

In dust explosions, the lower the oxygen concentration, the lower the explosion pressure and the rate of pressure rise, and it is said that the degree reaches 16 or less.

In this sense, it is effective to use vehicle engine exhaust gas.

However, the oxygen concentration in the engine exhaust gas varies depending on the operating conditions, and especially when operating with a light load, the oxygen concentration in the exhaust gas becomes high due to excess air (around the 17th cycle). On the other hand, when operating under high load, the fuel runs out and a large amount of oxygen in the air is consumed, resulting in a low oxygen concentration in the exhaust gas.
(approximately 7%) - The power required to discharge dangerous powder and granules such as pulverized coal using engine exhaust gas is small compared to the output of the vehicle engine, so there will be excess air and the oxygen concentration in the exhaust gas will be high. May cause dust explosion.

In view of this, the present invention is designed to reduce the oxygen concentration in the exhaust gas by systematically operating the engine at a high load, thereby making it possible to safely discharge hazardous particulate matter such as pulverized coal.

Embodiments of the present invention will be described below with reference to the drawings.

A first embodiment of the present invention is shown in FIG. A dump cylinder 3 is interposed between the section and the vehicle body 1.

4 is a discharge part formed at the lower rear end of the powder storage tank 2. 05 is the engine of the powder transport vehicle V, and in the middle of the exhaust pipe 6 of this engine 5 is one end of the introduction pipe 7. The other end of the introduction pipe 7 is connected to the discharge section 4 via a primary air supply pipe 8 and a secondary air supply pipe 9. 10 is a variable throttle valve interposed in the middle of the introduction pipe 7;
By appropriately constricting the introduction pipe 7 in the middle, the pressure inside the pipe from the engine 5 to the throttle valve 10 can be made high. Reference numeral 11 denotes a tank for storing an inert gas such as nitrogen gas, which is connected to the upper part of the powder storage tank 2 via a pipe 12, and an on-off valve 13 is provided in the middle of the pipe 12 as a valve device.

Reference numeral 14 denotes a communication pipe that communicates the discharge portion 4 with the inert gas storage tank 11, and an on-off valve 15 and a check valve 16 are interposed in the middle of the communication pipe 14, respectively.

A back pressure air supply pipe 17 is connected at one end to the introduction pipe 7 and at the other end to the pipe 12, with an on-off valve 18 and a check valve 19 interposed in the middle thereof.

Note that 20 is a cooler interposed in the middle of the introduction pipe 7;
21, 22 are filters, 25, 24, 25.26 are M
The valve is closed, 27 and 28 are Chetsuta valves, and 29 is a manhole. Figure 2 shows a second embodiment of the present invention, in which the same parts as in the first embodiment are designated by the same symbols.
A combustor Op is connected to the combustor Op, which enables pressurization.

In addition, 60 is a branch tube, 31 is a sakushi filter, 52
, 55 and 54 are on-off valves.

Next, to explain the operation of the present invention, first, in the first embodiment shown in FIG. Inert gas is caused to flow into the powder storage tank 2 from the tank 11 to prevent the pulverized coal from exploding during transportation. Next, when discharging pulverized coal from the 115-body storage tank 2, the dump cylinder 6 is extended,
Tilt the powder storage tank 2, and then close the on-off valve 7!6
25 is opened, while the closing valve 24 is closed to allow exhaust gas from the engine 5 to flow into the discharge part 4 via the exhaust pipe 6, the introduction pipe 7, and the secondary air supply pipe 8, and the pulverized coal is removed from the exhaust gas. It is mixed inside and discharged outside. At this time, a variable throttle valve 10 is installed in the middle of the introduction pipe 7, and since the introduction pipe 7 is throttled by the variable throttle valve 10, the pressure inside the introduction pipe of the engine 5 becomes high at the variable throttle valve 10. , powder storage tank 2
Since the inside of the fs introduction pipe is at a predetermined pressure (low pressure), the engine 5 is always operated at a high load, the oxygen concentration in the exhaust gas is reduced, and the pulverized coal can be safely discharged. . The exhaust gas from engine 5 is filtered through filter 2.
1 and 22 remove impurities, and further cooler 2
0, the temperature of the exhaust gas is lowered and can be supplied to the discharge section 4.

In addition, if the amount of fine powder particles is large and the amount of exhaust gas is too large to be discharged, the on-off valve 15 can be opened to prevent inert gas from flowing.

Next, in the second embodiment shown in 2nd vA, when the exhaust gas pressure is low and it is difficult to discharge the pulverized coal, the on-off valve 32.3
After closing the valve 4 and opening the on-off valve 33, if the engine 5 drives the compressor/circulator Op, the exhaust gas from the engine 5 can be pressurized by the compressor/circulator O11 and supplied to the discharge part 4.

Furthermore, if the exhaust gas air volume is insufficient, open/close valve 32.3
4 is opened and the on-off valve 33 is closed, the exhaust gas and the air from the compressor and sir Op are combined in the introduction pipe 7, and a sufficient amount of air can be supplied to the discharge part 4. In this case, it is necessary to adjust the variable throttle valve 10 and the on-off valve 64 so that the oxygen concentration in the mixed state of exhaust gas and air is below the limit oxygen concentration.

As explained above, according to the present invention, the oxygen concentration in the exhaust gas can be lowered by constantly operating the vehicle engine under high load when discharging dangerous particulate matter such as pulverized coal. Dangerous powder and granules can be safely discharged using gas.

[Brief explanation of drawings]

1wJ is a block diagram showing a first embodiment of the present invention, and FIG. 2 is a block diagram showing a second embodiment of the present invention. 1... Vehicle body, 2... Powder storage tank, 4...
・・・Discharge part, 5...Engine, 6...Exhaust pipe,
7...Introduction pipe, 8...-Next air supply pipe, 10.
...Variable throttle valve, 11...Inert gas storage tank, ■...Powder applicant rr Meiwa Shigyo Co., Ltd. Figure 1: Written amendment to the procedure / 1981 Patent Application No. 81977 2, Name of the invention: Powder discharge device for a powder transport vehicle 3, Person making the amendment Relationship with the case Patent applicant: Nishinomiya City 1-5-25, Ozone-cho (235) ShinMaywa Kogyo Co., Ltd. Daifu Shuji Tamagawa 4, agent '6764 product D♀1'' Co., Ltd. E7i2!%-Ter Service High 46, details of amendment as shown in the attached sheet. Contents of the amendment 1. The "Claims" in the specification are corrected as shown in the attached sheet. 2. The following is added on a new line after the 7th line of the 7th page of the specification. In the second embodiment, a throttle valve is inserted in the middle of the introduction pipe, but the same effect can be achieved by configuring the introduction pipe as a small diameter pipe." (1) Powder In a powder and granular material transport vehicle in which one end of an introduction pipe is connected to a discharge part of a granular material storage tank and the other end of the introduction pipe is connected to an exhaust pipe from an engine, a throttling mechanism is interposed in the introduction pipe. A powder discharge device for a powder and granular material transport vehicle consisting of a powder and granular material transport vehicle.The powder and granular material transport vehicle is equipped with an inert gas storage tank, and the inert gas storage tank and the upper part of the powder and granular material storage tank are opened and closed. A granular material discharge device for a granular material transport vehicle according to claim 1, which is connected via a valve.(4) A compressor is drivably connected to the engine, and the compressor is connected to the inlet pipe. A granular material discharge device for a granular material transport vehicle as set forth in claim 1, which is interposed in the middle of the invention. Name: Powder and granular material discharge device 3 for powder and granular material transport vehicle, relationship with the case of the person making the amendment Patent applicant: 1-5-25 Kozone-cho, Nishinomiya City (235) Minatsugu Tamagawa, representative of ShinMaywa Industries Co., Ltd. ゛4 , Agent 6, Contents of amendment Contents of amendment As of March 27, 1981, the procedural amendment submitted was withdrawn.
The specification is amended as follows. 1. In the specification, ``Claim j is corrected as shown in the attached sheet. 2. From the 1st line of the 3rd page of the specification to the 4th unit r of the same page.'' Correct it as follows. ``In view of this, the present invention systematically operates the engine at high load by applying back pressure to the exhaust gas from the exhaust gas, thereby reducing the oxygen concentration in the exhaust gas and safely eliminating hazardous substances such as pulverized coal. 1 3. On page 3 of the specification, line 15, r1o, add 1 as r back pressure generating means after 1. 4. #4 Specification No. 7 After the 7th line of the page, insert a new line and add the following: Note: In the first and second embodiments, a throttle valve is inserted in the middle of the introduction pipe as a means for generating back pressure. ,
In addition, similar effects can be achieved by configuring the introduction tube as a tube with a small diameter. J (1) In a powder transport vehicle in which one end of an introduction pipe is connected to the discharge part of a powder storage tank and the other end of the introduction pipe is connected to an exhaust pipe from an engine, an I A granular material discharge device for a granular material transport vehicle, which is constructed by interposing an earthwork. (1) The scope of the present invention is characterized in that the powder transport vehicle is equipped with an inert gas storage tank, and the inert gas storage tank and the upper part of the powder storage tank are connected via an on-off valve. A powder discharge device for a powder transport vehicle according to item 1. 2) A granular material discharge device for a granular material transport vehicle according to claim 1, wherein a compressor is drivably connected to the engine, and the compressor is interposed in the middle of the introduction pipe.

Claims (3)

[Claims] (1) In a powder transport vehicle in which one end of an introduction pipe is connected to the discharge part of a powder storage tank, and the other end of the introduction pipe is connected to an exhaust pipe from an engine, a part of the introduction pipe is A powder discharge device for a powder transport vehicle equipped with a throttle valve. (2) A claim in which the powder and granular material transport vehicle is equipped with an inert gas storage tank, and the inert gas storage tank and the upper part of the powder and granular material storage tank are connected via an opening/closing boat. A powder discharge device for a powder transport vehicle according to item 1. (3) A powder and granular material transport vehicle according to claim 1 or 2, wherein a compressor is drivably connected to the engine, and the compressor is interposed in the middle of the introduction pipe. Powder discharge device.