JPH0311721Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a sampling device that collects samples of powdered material processed in a rotary kiln or the like while keeping it airtight.

Prior Art Conventionally, sampling (sample collection) of powder and granular material dried and fired in a rotary kiln was carried out by entering and exiting a receiving box through an inspection hole or sampling opening provided on the side of a discharge hood. However, the gas flowing inside the rotary kiln is not air or fuel combustion gas, such as nitrogen gas, carbon dioxide gas,
In the case of hydrogen gas or a mixture thereof, the gas flows out from the inspection hole or opening or the outside air flows into the exhaust hood during sampling. That is, when the pressure inside the kiln is higher than the outside pressure, the gas flows out, and when it is lower than the outside pressure, the outside air flows in. Therefore, there is a risk of ignition due to contact between the gas inside the kiln and air, or environmental deterioration due to the outflow of the gas inside the kiln, and in reality, it is impossible to collect samples by such a method. . Therefore, there is a strong need for the development of an airtight sampling device that does not allow outflow of gas within the kiln or inflow of outside air.

On the other hand, as a sampling device for powder and granular materials,
One example is that published in Publication No. 56-13894 (see Figure 5).

In this sampling device, an inclined sleeve is provided passing through the wall of the hotsparo, and a sample intake hole is bored in the upper surface of this sleeve.
The lower end of the sloping sleeve is a series of tube holes,
A sampling measuring sliding piece is provided in the inclined sleeve, and the sliding piece is connected at a predetermined interval by a thin rod to the inside diameter of the sliding piece. The pieces are designed to reciprocate within the range between the inclined sleeve and the tube.

In this device, when a sample is to be collected, the sample is placed between the receiving hole and the sliding piece of the inclined sleeve, and the air cylinder is activated to move the weighing sliding piece back and drop it into the tube. It is something.

Problems that the invention attempts to solve At this time, while separating the inside of Hotsuparo from the outside air,
It is possible to collect samples.

However, since the weighing slide piece fits and slides inside the inclined sleeve, there are cases where the sample (powder or granules) gets caught in the piece and inside the sleeve, making it impossible to operate smoothly. Furthermore, when installed in a hopper or chute in a high-temperature atmosphere, there is a problem that operation becomes difficult due to thermal deformation of the inclined sleeve and sliding piece.

The purpose of this invention is to improve reliability by constantly operating smoothly while sampling powder and granular materials while insulating it from the outside air.

Means for Solving the Problem A sample receiving box having a receiving opening is provided in the middle of the falling particulate matter in the discharge hood, and one end of a conduit penetrating from outside the discharge hood is connected to this receiving box, and the other end is connected to the receiving box. Connected to the sample storage box via a valve, the intermediate rod is connected to the rod of the cylinder provided outside the discharge hood by a connecting member, and the intermediate rod is slidably penetrated into the discharge hood. A lid plate for opening and closing the receiving opening is provided at the end, and a bellows-like air-sealing means is provided at the penetrating portion of the intermediate rod, and one end of the air-sealing means is fixed to the discharge hood and the other end to the connecting member. That's true.

Function When attempting to collect a sample of powder or granular material, open the valve and operate the cylinder to retract the cover plate via the rod. This opens the receiving opening of the sample receiving box, allowing the inside of the discharge hood to be opened. A part of the falling powder flows into the sample receiving box,
The sample is collected through a conduit and a valve into a sample storage box.

Once a predetermined amount of sample has been collected, the cylinder is actuated again to advance the lid plate to close the receiving opening of the sample receiving box and close the valve.

This operation is performed at appropriate time intervals to obtain samples.

At this time, even if the rod moves back and forth and the powder particles collide with the lid plate repeatedly, the bellows-like airtight means reliably prevents gas from flowing out of the kiln or outside air from flowing into the kiln.

In addition, when the gas in the kiln is high temperature, the high temperature heat will be transferred to the cylinder via the rod, but since the rod is connected to the intermediate rod by a connecting member, there is no effect of heat on the cylinder. is significantly reduced.

Embodiment In FIGS. 1 to 3, reference numeral 1 denotes a rotary kiln body, which is rotatably mounted on a support roller device 2 and rotated by a drive device 3.

4 is the input side hood, 5 is the powder input chute,
6 is a discharge hood. Reference numeral 7 denotes a funnel-shaped sample receiving box with a receiving opening 7' at the top, which is provided in the middle of the falling powder and granular material in the discharge hood 6. One end of a conduit 8 is connected to the lower end of this receiving box, and this conduit 8 is discharged. The hood 6 extends outside and a sample storage box 9 is connected to the other end.

10 is a valve provided in the conduit 8 at the top of the storage box 9; 11 is a lid plate that opens and closes the receiving opening 7' of the sample receiving box 7; this lid plate has a chevron shape to prevent falling powder particles from accumulating. .

Reference numeral 12 denotes an air cylinder for advancing and retracting installed on a pedestal provided on the discharge hood 6, and the rod 1 of this cylinder
3 through a connecting member 13b, and the intermediate rod 13a penetrates the wall of the exhaust hood 6 and projects into the exhaust hood 6,
The cover plate 11 is attached to the tip thereof, and the cover plate 11 is moved forward and backward.

Reference numeral 14 denotes a bellows-shaped airtight means provided in the penetrating portion of the intermediate rod 13a, which consists of an outer tube 14a provided outside the wall of the discharge hood 6 and a bellows 14b provided adjacent to the outer tube 14a.
One end is fixed to the outer cylinder 14a, and the other end is fixed to the connecting member 13b.

15 is a switching valve connected to the advance/retreat cylinder 12 via a pipe 16; 17 is a switching valve connected to the valve 1 via a pipe 18;
By switching the switching valves 15 and 17, compressed air is supplied to the cylinders 12 and 19 from a compressed air source (not shown).
The cylinders 12 and 19 are driven by supplying the same to the cylinders 12 and 19.

20 and 21 are timers for each cylinder 12 and 19. 22 is a rotary valve provided at the lower end of the exhaust hood 6.

Although not shown in the drawings, the rotary kiln body 1, portion a of the input side hood 4, and portion b of the discharge side hood 6 are provided with sealing means such as gland packing.

In the above, the powder and granules supplied from the input chute 5 are dried or fired in the rotating kiln body 1, and then fall through the discharge hood 6 and are discharged through the rotary valve 22.

Therefore, when sampling powder and granular materials,
The switching valves 17 and 15 are switched to send air from a compressed air source (not shown) into the cylinders 12 and 19 to open the valve 10 and move (retract) the cover plate 11 via the rod 13 and the intermediate rod 13a to receive it. When the opening 7' is opened, a part of the powder and granules falling in the discharge hood 6 enters the sample receiving box 7 through the receiving opening 7', flows into the sample receiving box 9 from the conduit 8 via the valve 10, be collected.

After a predetermined amount of sampling is completed, the switching valve 15 is switched to operate the cylinder 12 to move (advance) the cover plate 11 to close the receiving opening 7' of the sample receiving box 7.

When there is no powder in the sample receiving box 7 and conduit 8, the switching valve 17 is switched and the valve 10 is closed.

The above operations complete one sampling.

Note that the timers 20 and 21 are used to set an arbitrary time or a certain fixed time at regular time intervals.

Furthermore, although the description has been made regarding a rotary kiln that primarily performs baking, it goes without saying that the present invention can also be applied to a rotary dryer that primarily performs drying.

Effects In this invention, the lid plate moves forward and backward over the receiving opening of the sample receiving box, so even if the receiving box and the lid plate are affected by the heat in the discharge hood and the high temperature of the powder, the lid plate will remain intact even if it is slightly deformed. can operate smoothly at all times with almost no hindrance in its forward and backward movements.

Further, an intermediate rod is connected to a rod of a cylinder provided outside the discharge hood by a connecting member, the intermediate rod is slidably penetrated into the discharge hood, and a lid for opening and closing the receiving opening is provided at the end of the intermediate rod. A plate is provided, and a bellows-like air-sealing means is disposed in the penetrating portion of the intermediate rod, and one end of the air-sealing means is fixed to the discharge hood and the other end to the connecting member.
Even if the rod moves back and forth or the powder collides with the lid plate, the bellows-like airtight means prevents the gas inside the kiln from flowing out or the outside air flowing in. As a result, the gas inside the kiln Not only is it safe as there is no danger of ignition due to contact with outside air (air), but there is also no risk of deterioration of the surrounding environment due to the outflow of gas inside the kiln.

Furthermore, since the other end of the conduit is connected to the sample storage box via a valve, even if the upper opening is not completely blocked by the lid plate, the gas inside the kiln cannot flow out from the conduit or the air can flow in from the sample storage box. Definitely blocked.

Furthermore, since the intermediate rod is connected to the cylinder rod by a connecting member, maintenance, inspection, and replacement of the bellows-like air sealing means, intermediate rod, and cover plate can be easily performed by simply removing the connecting member and without removing the cylinder. In addition, the cylinder can withstand long-term use, even when the gas in the kiln is hot, the thermal effects transmitted through the rod are significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is an overall front view of the rotary kiln of the present invention, Fig. 2 is a longitudinal sectional front view of the main parts of the invention, Fig. 3 is a longitudinal sectional side view of the main parts of the invention, and Fig. 4 is an operational system diagram of the invention. FIG. 5 is a longitudinal sectional front view showing a conventional example. 1... Rotary kiln body, 6... Discharge hood, 7... Sample receiving box, 8... Conduit, 10...
... Valve, 11 ... Sample storage box, 12 ... Cylinder, 13 ... Rod, 14 ... Airtight means.

Claims (1)

[Scope of utility model registration request] In a rotary kiln or the like equipped with a powder discharge hood, a sample receiving box having a receiving opening is provided in the middle of the falling powder or granular material in the discharge hood, and one end of a conduit penetrating from outside the discharge hood is connected to this receiving box. At the same time, the other end is connected to the sample storage box via a valve, and the intermediate rod is connected to the rod of the cylinder provided outside the discharge hood by a connecting member, and the intermediate rod is slidably penetrated into the discharge hood. A cover plate for opening and closing the receiving opening is provided at the end of the intermediate rod, and a bellows-like air sealing means is provided in the penetrating portion of the intermediate rod, and one end of the air sealing means is connected to the discharge hood, and the other end is connected to the exhaust hood. A sampling device for powder and granular materials in a rotary kiln, etc., characterized in that it is fixed to a connecting member.