JP4768472B2 - Grain suction transfer device - Google Patents

Description

  The present invention relates to a grain suction conveyance device.

  Conventionally, as shown in FIG. 5, a grain supply unit 200 that supplies grains 100 such as rice and wheat to be conveyed, and an air conveyance pipeline that air-transports the grains 100 supplied from the grain supply unit 200. A conveyance pipe 300, a grain collection unit 400 that communicates with the conveyance pipe 300, receives and collects the grain 100 that has been conveyed by air, and communicates with the grain collection unit 400, and an air flow is generated in the conveyance pipe 300 by intake air. There was a grain suction conveyance device provided with the suction mechanism 500 to be generated (see, for example, Patent Document 1).

In FIG. 5, reference numeral 410 denotes a grain receiving unit constituting the grain collecting unit 400, 420 denotes a rotary valve for discharging grains provided at the lower part of the grain receiving unit 410, 430 denotes a grain collecting hopper, and 600 denotes a dust collector.
JP 2006008304 A

However, in the conventional grain suction conveyance device described above, when the outside air temperature decreases, for example, in winter, condensation may occur in the conveyance pipe 300 that constitutes the air conveyance pipeline. There was a risk of sticking and causing tube clogging. Particularly, when the outside air temperature became 10 ° C. or less, as shown, Oite condensation on the bent portion component of the transport pipe 300 occurs, the adhesion amount of grain to be conveyed have often increases.

  Therefore, in the past, an electric heater was used to prevent condensation by partially heating, but condensation may occur in unexpected places, and the electric heater can be used. In that case, the cost burden was large.

  An object of this invention is to provide the grain suction conveyance apparatus which can solve the said subject.

(1) The present invention according to claim 1 includes a grain supply unit that stores grains to be conveyed, an air conveyance line that conveys the grains supplied from the grain supply unit by air, and the air conveyance line. A suction mechanism that receives and collects the air-carrying grain and communicates with the grain collecting part that communicates the terminal part of the air conveying pipe and communicates with the grain collecting part, and generates an air flow in the air conveying pipe by intake air And a conveyance path heating means for heating the air conveyance pipeline by the exhaust air from the suction mechanism, and the conveyance path heating means is arranged outside the inner pipe constituting the air conveyance pipeline. An outer pipe is provided, and an exhaust pipe extended from the suction mechanism is communicated with a space formed between the inner pipe and the outer pipe, and the tip from the exhaust pipe is connected to the air conveyance pipe line. The branch flow channel communicated with It provided with an adjustment valve.

(2) In the present invention according to claim 2, in the grain suction conveyance device according to claim 1, there is provided a branch intake pipe branched from the middle of the air conveyance pipe and having a terminal end connected to the grain recovery section. It is characterized by that.

  According to the present invention, the exhaust air from the suction mechanism whose temperature is higher than that of the outside air can be used to raise the internal atmosphere temperature over the entire air conveyance pipe line, so that the dew point can be increased, and the air conveyance pipe line Condensation inside can be effectively prevented. In addition, since the exhaust that was originally only released into the outside air can be used effectively, it is advantageous in terms of cost.

The grain suction conveyance device according to the present embodiment includes a grain supply unit that stores grains to be conveyed, an air conveyance pipeline that pneumatically conveys the grain supplied from the grain supply unit, and an air from the air conveyance pipeline. A grain collection unit that receives and collects the conveyed grain, and a suction mechanism that is connected to the grain collection unit that communicates with a terminal part of the air conveyance line, and generates an air flow in the air conveyance line by intake air; Are provided with conveying path heating means for heating the air conveying pipeline by the exhaust air (hereinafter also referred to as “exhaust”) from the suction mechanism.
That is, it is known that the exhaust from the suction mechanism is usually about 15 to 30 ° C. higher than the outside air temperature as a feature of the grain suction conveyance device.

  Therefore, in order to prevent dew condensation from occurring in the air conveyance pipeline when the outside air temperature decreases, the exhaust from the suction mechanism having a temperature higher than the outside temperature is used to increase the temperature of the air conveyance pipeline. The dew point of the air conveyance pipe is increased by raising the temperature in the air conveyance pipe line, thereby effectively preventing condensation.

In the grain suction conveyance device having the above-described configuration, as the conveyance path heating means, as an example, the outside air communication port provided on the start end side of the air conveyance pipe and the exhaust pipe extended from the suction mechanism communicate with each other. The exhaust air can be introduced into the air conveyance pipeline. That is, by introducing and circulating the exhaust gas that was originally only released to the outside air into the air conveyance pipe line, it is possible to effectively raise the temperature inside the air conveyance pipe line. As described above, the exhaust gas that has been discarded can be used effectively, so that energy is saved, and the cost for preventing condensation can be reduced. The communication between the outside air communication port and the exhaust pipe does not necessarily have to be connected, and it is only necessary that the tip of the exhaust pipe faces the outside air communication port.

  Furthermore, it is preferable to provide an exhaust air amount adjusting valve and a temperature sensor in the middle of the exhaust pipe.

In other words, if all the exhaust from the suction mechanism is introduced into the air conveyance pipe, the temperature may rise excessively, and if it rises too much, the grain to be conveyed may deteriorate in quality. It is possible to influence. Therefore, the exhaust amount is adjusted so that it can be used in the range of 20 to 90% of the exhaust amount. The exhaust air amount adjustment valve may be a manual type or an automatic adjustment type. In particular, in the case of the automatic adjustment type, an air conditioning control unit is provided, and the valve opening / closing actuator of the exhaust air amount adjusting valve and the temperature sensor are connected to the air conditioning control unit, and detection from the temperature sensor is performed. Depending on the temperature, the valve opening and closing actuator is opened and closed, and the exhaust gas and the outside air are mixed appropriately, whereby the temperature in the air carrying conduit can be maintained at a predetermined temperature. Furthermore, since there is moderate humidity in the exhausted air, it is possible to prevent the grains to be transported from drying if this does not cause an excessive increase in the amount of saturated steam.

Further, as the implementation form of the conveying path heating means, an outer tube disposed outside the inner tube constituting said air conveying conduit, the space formed between the inner tube and the outer tube, the suction An exhaust pipe extended from the mechanism may be communicated.

  That is, the air conveyance pipe line has a double-pipe structure, and an inner pipe that actually conveys the grain and an outer pipe that surrounds the inner pipe are provided, and the gap between the outer pipe and the inner pipe is an exhaust passage. The inner tube is heated from the outside to raise the internal temperature.

  In this case, a branch flow path whose tip is communicated with the air conveyance pipe line from the exhaust pipe may be extended, and a discharge air amount adjustment valve may be provided in the branch flow path.

  That is, when it is desired to give appropriate moisture or the like in the air conveyance pipe line, a part of the exhaust gas can be introduced into the air conveyance pipe line while adjusting the opening degree of the exhaust air amount adjusting valve. Even in this case, the communication between the exhaust pipe and the air conveyance pipe is not necessarily connected, and the tip of the exhaust pipe faces the opening at the start end of the air conveyance pipe. It doesn't matter.

By the way, in the grain sucking and conveying apparatus described above, it is possible to provide a branched intake pipe which branches from the middle of the air conveying pipe and whose end is connected to the grain collecting unit.
That is, with this configuration, in addition to the above-described effects, the grain intake speed can be reduced by providing a branch intake path in the middle of the air conveyance pipe, reducing the impact applied to the grain and reducing the grain. Can be prevented as much as possible.

  In order to prevent the grains moving in the air conveyance pipe from flowing into the branch intake pipe, the branch intake pipe is preferably branched upward from the air conveyance pipe, more preferably Furthermore, it is preferable that the air conveyance pipe is once branched in the direction opposite to the grain conveyance direction.

  That is, it is configured to be able to give greater resistance, including the gravity of the grain itself, rather than the force that attracts the grain conveyed through the air conveyance conduit to the branch intake flow path, and the grain has no resistance. The air conveyance pipe that can go straight is softly conveyed to the grain recovery unit at a reduced conveyance speed.

  Hereinafter, specific embodiments of the grain suction and conveyance device according to the present invention will be described with reference to the drawings. Here, although the grain to be conveyed is described as rice, it is natural that wheat or beans may be used.

[ Reference example ]
FIG. 1 is a schematic overall explanatory view showing a grain suction conveyance device A according to a reference example .

  As shown in the figure, the grain suction conveyance device A includes a grain supply unit 1, an air conveyance line 2 serving as a conveyance path for grains a such as rice supplied from the grain supply unit 1, and the air conveyance line 2. Grain collection unit 4 that receives grain a that has been conveyed through air, and suction connected to and communicated with the grain collection unit 4 and sucking grain a together with air through the grain collection unit 4 and the air conveyance conduit 2 And a mechanism 3.

The grain a stored in the grain supply unit 1 is supplied to the air conveyance line 2 by driving the suction mechanism 3 and can be conveyed by air to the grain collection unit 4 by suction.
The grain supply unit 1 primarily stores the milling machine (here, the rice milling machine 10) that mills the grain a and the rice after the milling (the grain a) from the rice milling machine 10 via the chute 11, and is conveyed by air. The hopper 12 is supplied to the pipe 2, and a short grain supply cylinder 15 having a grain supply port 14 projects downward from the funnel-shaped bottom surface 13 of the hopper 12. Further, an openable / closable shutter (not shown) is attached to the grain supply cylinder 15, and the opening width of the grain supply port 14 is adjusted by the sliding amount of the shutter, so that the grain a is supplied to the air conveying pipe 2 per hour. The amount is adjusted.

  The air conveyance pipe line 2 is formed such that the start end side and the rear end side are curved upward at substantially right angles, and the start end opening portion 20 that expands the front end and serves as an outside air intake is used as the grain supply. While facing the grain supply port 14 of the hopper 12 of the section 1, the rear end side is bent in a substantially horizontal direction and extended toward the grain collection unit 4, and is attached to the side wall of the grain receiving unit 40 constituting the grain collection unit 4. It penetrates. In the figure, 41 is a grain supply guide that is connected to the terminal end of the air conveyance pipe line 2 and is curved in the grain receiving section 40 and has its tip extended downward, and is conveyed to the side wall 40a of the grain receiving section 40. The grain a is prevented from colliding vigorously so that the grain a is not damaged. Reference numeral 2a denotes a first bent portion of the air conveyance pipe line 2, 2b denotes a second bent portion, and 2c denotes a third bent portion.

As described above, in this reference example , the intake port for the outside air drawn into the air conveyance pipe line 2 by the suction mechanism 3 also functions as a grain input port for taking the grain a into the air conveyance pipe line 2. The outside air can be sucked in while easily supplying the grain a into the air conveying pipe 2 by natural fall, and the grain a is effectively supplied into the air conveying pipe 2 without being dissipated and riding on the air current. Then, the air flows through the air conveyance pipe 2 as it is and is conveyed to the grain collection unit 4.

  In addition, since the grain supply unit 1 and the air conveyance pipe line 2 are independent from each other, a process of connecting the grain supply unit 1 and the air conveyance pipe line 2 by welding or the like when the grain suction conveyance device A is manufactured. This eliminates the need for easy manufacture of the entire grain suction / conveying device A, and this makes it possible to reduce costs.

  As shown in FIG. 1, the grain collection unit 4 is connected to the grain receiving unit 40 communicating with the air conveyance pipe 2 and a grain outlet 42 formed at the lower end of the grain receiving unit 40. A rotary valve 43 and a grain storage hopper 44 disposed below the rotary valve 43 are provided.

  The suction mechanism 3 communicates and connects the intake pipe 30 to the ceiling portion of the grain receiving section 40, and also connects the blower device 31 to the end side of the intake pipe 30 via the dust collector 5. And the start end 32a of the exhaust pipe 32 is connected to the blower device 31 in communication. Reference numeral 50 denotes a rotary valve provided in the dust collector 5.

  With such a configuration, the grain a can be conveyed by air by suction by the suction mechanism 3 having a relatively small capacity compared to an air feeding device of a system that pumps air, and the entire device can be made compact.

In the grain suction conveyance device A having the above-described configuration, in this reference example , the tip 32b of the exhaust pipe 32 is communicated with the hopper 12 of the grain supply unit 1, and the exhaust from the suction mechanism 3 is sent to the air conveyance pipeline 2. Ru can be introduced in the Tei.

In this reference example , an exhaust air amount (exhaust amount) adjustment valve 6 is attached in the middle of the exhaust pipe 32, and a temperature sensor 7 is attached downstream of the exhaust amount adjustment valve 6. A branch exhaust pipe 33 is provided in the middle of the exhaust pipe 32 and upstream of the exhaust amount adjustment valve 6, and its tip 33a is opened to the outside air.

  Note that the communication between the exhaust pipe 32 and the hopper 12 does not necessarily need to be in a connected state as long as the exhaust from the blower device 31 can be introduced into the air conveying pipe 2. That is, when the upper surface of the hopper 12 is opened, the tip 32b of the exhaust pipe 32 may face the opening.

With this configuration, unless the exhaust amount adjustment valve 6 is fully closed, when the blower device 31 of the suction mechanism 3 is driven, the grain a rides on the air conveyance pipe 2 from the rice mill 10 through the hopper 12. On the other hand, the exhaust pipe 32 circulates exhaust air that is normally about 15 to 30 ° C. higher in temperature than the outside air and is circulated from the exhaust pipe 32. At this time, due to the ejector effect when outside air is drawn from the outside air intake port, the exhaust from the exhaust pipe 32 is also smoothly drawn into the air conveying pipe 2 and recirculates.
Therefore, the temperature in the air conveyance pipeline 2 rises over the whole, and the amount of water vapor that can be contained in the air in the air conveyance pipeline 2 also increases. If the reduction is performed, the dew point (temperature at which water vapor is saturated) in the air conveyance pipe line 2 is increased, so that dew condensation is difficult even in winter.

  As for the relationship between temperature and the amount of saturated water vapor, as shown in the graph in FIG. Therefore, for example, if the outside air in the winter is 10 ° C., the temperature in the air conveyance conduit 2 is lowered (for example, the outside air temperature is close to 10 ° C.) with the conventional grain suction conveyance device, and moreover than before the rice milling As the temperature rises and the grain a containing some moisture passes one after another, the water vapor drains, and in particular, condensation occurs near the first bent part 2a and the second bent part 2b, and the grain a adheres to this. As a result, it was a factor causing tube clogging. Therefore, by pulling the exhaust gas having a temperature higher than that of the outside air into the air conveyance pipe line 2, for example, if the temperature rises even by several degrees, the open air becomes higher and it is possible to prevent dew condensation.

Further, if the temperature rise in the air conveyance pipe line 2 becomes excessive, the quality of the grain a may be deteriorated. Therefore, in this reference example , the exhaust amount adjusting valve 6 is used to reduce the quality of the grain a. It is made to mix with outside air in the range of -90%. In particular, in this reference example , the branch exhaust pipe 33 that is open to the outside air is provided upstream of the exhaust amount adjustment valve 6 in advance, so that a part of the exhaust from the blower device 31 is discharged and the exhaust amount is reduced. The outside air and mixing in the range of 20 to 90% described above by the adjusting valve 6 can be smoothly performed.

  The adjustment of the exhaust amount may be appropriately adjusted based on the temperature in the pipe monitored by the temperature sensor 7, but preferably an air conditioning control unit (not shown) is provided, and the exhaust amount is provided in the air conditioning control unit. A valve opening / closing actuator (not shown) of the adjustment valve 6 is connected to the temperature sensor 7, and the valve opening / closing actuator is opened / closed according to the detected temperature from the temperature sensor 7, and exhaust and outside air are discharged. It is preferable to perform so-called feedback that keeps the temperature in the air conveyance pipe line 2 at a predetermined temperature by appropriately mixing.

As described above, according to the present reference example , the internal atmosphere temperature is increased over the entire air conveyance pipe line 2 using the exhaust from the suction mechanism 3 (blower device 31) having a temperature higher than that of the outside air. Therefore, the dew point can be increased, condensation in the air conveyance pipe line 2 can be effectively prevented, and tube clogging caused by the grain a adhering to the pipe wall due to condensation can be prevented. it can.

  In addition, since the exhaust from the blower device 31 that was originally discharged outside the system can be used effectively, the running cost can be greatly reduced compared to using an electric heater or the like.

By the way, in the grain suction conveyance apparatus A according to the present reference example , a branched intake pipe 8 is provided which is branched from the vicinity of the end portion of the air conveyance conduit 2 and whose end portion 81 is connected to the grain receiving portion 40 in communication. The branch intake pipe 8 is provided on the downstream side of the air conveyance pipe line 2, that is, immediately before the grain receiving part 40 of the grain collection part 4. In addition to branching upward and in the opposite direction to the conveying direction, the end portion 51 is extended by being bent toward the grain receiving portion 40 side, and the side wall 40a of the grain receiving portion 40 is penetrated. It is extended obliquely downward at an angle of approximately 45 degrees.

With this configuration, the intake air from the suction mechanism 3 is also made from the front end opening of the branch intake pipe, and the suction force of the air conveyance conduit 2 is reduced. Moreover, since the branch intake pipe 8 is branched upward in the direction opposite to the conveying direction of the grain a, a large resistance including the gravity of the grain a itself causes the grain a to be sucked into the branch intake pipe 8. The grain a is better than the force, and the grain a can be straightly moved without resistance. The grain is softly conveyed to the grain receiving unit 40 of the grain collecting unit 4 at the reduced conveyance speed. Accordingly, the grain a is conveyed into the grain receiving unit 40 at a slow speed, and the impact is mitigated to prevent the grain a from being damaged. In particular, since the grain supply guide 41 is provided in the present reference example , the damage prevention function for the grain a is further enhanced.

  It should be noted that the curvature and circumferential length of the curved portion 52 of the branch intake pipe 8 or the branch angle from the branch portion 53 can be set as appropriate. In addition, a filter (not shown) such as a mesh body having an eye smaller than the grain a to be transported is disposed at the branching portion 53 serving as a communicating portion between the air transporting conduit 2 and the branch intake pipe 8. Thus, it is possible to more reliably prevent the grain a from flowing into the branch intake pipe 8.

Embodiment of the present invention
Next, the grain suction conveyance device B according to the embodiment of the present invention will be described with reference to FIG. In addition, about the component same as a reference example , the same code | symbol is used and the detailed description is abbreviate | omitted.

As shown in the figure, the grain suction conveyance device B according to the present embodiment is similar to the grain suction conveyance device A according to the previous reference example , and the grain supply unit 1 and grains such as rice supplied from the grain supply unit 1 are illustrated. an aerial conveying line 2 serving as a conveying path for a, a cereal recovery unit 4 for receiving the cereal a conveyed by air through the air conveying line 2, and a cereal recovery unit connected in communication with the cereal recovery unit 4 4 and a suction mechanism 3 that sucks the grain a together with the air through the air conveying pipe 2.

  In such a configuration, a characteristic configuration in the present embodiment is that the air conveyance pipe line 2 has a double pipe structure including an inner pipe 21 that actually conveys grain and an outer pipe 22 that surrounds the inner pipe 21. The exhaust pipe 32 ′ extended from the suction mechanism 3 is communicated with a space formed between the inner pipe 21 and the outer pipe 22.

  That is, the space is used as an exhaust passage 23 communicating with the exhaust pipe 32 ′, and exhaust air having a temperature higher than that of the outside air is passed through the exhaust passage 23 to heat the air conveyance conduit 2 from the outside. The internal temperature is raised to increase the dew point.

  In this case, the inner pipe 21 serving as the air conveyance pipe line 2 is covered with the outer pipe 22 and is not directly in contact with the low temperature outside air in winter, so that heat is not rapidly taken away to the outside, and the exhaust flow A relatively high temperature exhaust (15 to 30 ° C. higher than the outside air) flows through the passage 23 so that the inner pipe 21 can be heated, so that the dew point inside the inner pipe 21 is also raised and condensation can be prevented.

  Further, in this case, as shown in FIG. 4, a branch flow path 34 for communicating the tip from the exhaust pipe 32 'to the inside of the air conveyance pipe line 2, that is, the inner pipe 21, is extended. It is also possible to provide an exhaust amount adjusting valve 6.

  That is, when it is desired to give appropriate moisture or the like into the inner pipe 21 (air conveyance pipe line 2), a part of the exhaust gas is introduced into the air conveyance pipe line 2 while adjusting the opening degree of the exhaust amount adjustment valve 6. can do. Even in this case, it is not always necessary to connect the tubular body constituting the branch flow path 34 and the air carrying conduit 2 (inner pipe 21). What is necessary is just the structure which faces the starting end opening part 20 of the pipe line 2.

  Although the present invention has been described through the embodiments described above, the present invention is not limited to the embodiments. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. not.

It is a typical whole explanatory view showing a grain suction conveyance device concerning a reference example . It is a graph which shows the relationship between temperature and saturated water vapor amount. It is a schematic overall view showing a grain suction conveying device according to implementation embodiments. It is an explanatory view showing a modification of the grain suction conveying device according to the implementation embodiments. It is typical whole explanatory drawing which shows the conventional grain suction conveyance apparatus.

Explanation of symbols

A Grain suction conveyance device B Grain suction conveyance device a Grain 1 Grain supply unit 2 Air conveyance line 3 Suction mechanism 4 Grain collection unit 6 Displacement adjustment valve 7 Temperature sensor 8 Branch suction pipe 32 Exhaust pipe

Claims (2)

A grain supply unit for storing grains to be conveyed;
An air conveyance conduit for conveying the grains supplied from the grain supply unit by air;
A grain collection unit that receives and collects the grains conveyed by air from the air conveyance pipeline;
A suction mechanism that is connected in communication with the grain recovery unit that communicates the terminal portion of the air conveyance pipe line, and generates an air flow in the air conveyance pipe line by intake air ;
A conveyance path heating means for heating the air conveyance pipeline by the exhaust air from the suction mechanism;
With
The transport path warming means includes an outer pipe provided outside the inner pipe constituting the air transport pipe, and an exhaust gas extended from the suction mechanism in a space formed between the inner pipe and the outer pipe. A grain having a configuration in which a pipe is communicated, and further, a branch flow path whose tip is communicated with the air conveyance pipe line is extended from the exhaust pipe, and a discharge air amount adjustment valve is provided in the branch flow path Suction transfer device. 2. The grain suction / conveying apparatus according to claim 1, further comprising a branch intake pipe branched from the middle of the air conveying pipe and having a terminal end connected to the grain collecting unit .

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