JP2007151405A - Warm water disinfection apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve operation efficiency of warm water disinfection and to strictly control a warm water temperature, a warm water immersion time, a cold water temperature, a cold water immersion time, etc. <P>SOLUTION: The warm water disinfection apparatus 1 is equipped with a warm water disinfection tank 3 for immersing seeds in warm water and disinfecting them and a cooling tank 4 for immersing the seeds disinfected by warm water in cold water. The warm water disinfection tank 3 is connected to the cooling tank 4 and a conveying apparatus 5 for successively handing and conveying a plurality of unhulled rice storage bags (seed storage containers) 6 above both the tanks 3 and 4. The plurality of unhulled rice storage bags 6 are successively moved from the warm water disinfection tank 3 through the cooling tank 4 by the conveying action of the conveying device 5 to continuously carry out the warm water disinfection and cooling of seeds. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hot water disinfection device that disinfects seeds such as seed pods by immersing them in warm water.

There is known a hot water disinfection device that disinfects seed pods by soaking them in warm water (for example, see Patent Documents 1 to 4). This type of hot water disinfection device is provided with a hot water disinfection tank containing hot water and a cooling tank containing cold water. For example, when disinfecting seed water with hot water, the seed material stored in the container is heated to 60 ° C. hot water. After soaking for 10 minutes, cool immediately by soaking in cold water of 20 ° C or lower. The reason for cooling after hot water disinfection is to return the seed pods to their original state as quickly as possible to avoid a decrease in germination rate. In such a hot water disinfection method, in order to obtain a sufficient disinfection effect while avoiding a decrease in germination rate, it is required to strictly control the hot water temperature, the cold water temperature, the hot water immersion time, the cold water immersion time, and the like. .
Japanese Patent No. 3691664 Japanese Patent No. 3595954 Japanese Patent No. 3448773 JP 2004-290011 A

  However, in a conventional hot water disinfection device, a basket-shaped seed storage container containing a large amount of seed vats is suspended by a self-propelled crane and immersed in the hot water in the hot water disinfection tank at once, so that the temperature of the hot water drops sharply. There is a problem that strict temperature control becomes difficult. In addition, when a large amount of seed pods are packed in a soot bag and immersed in warm water, the hot water does not quickly penetrate into the center of the soot bag, and the processing temperature may vary. Conventionally, since the seed storage container is moved by a manually operated self-propelled crane, not only the work efficiency is poor, but also the hot water immersion time and the cold water immersion time may vary.

The present invention has been created in order to solve these problems in view of the above circumstances, and is a hot water disinfection tank for disinfecting seeds by immersing the seeds in warm water, and a hot water disinfected seed in the cold water. A hot water disinfection device comprising a cooling bath for cooling, and a continuous connection of the hot water disinfection bath and the cooling bath, and a transport device for sequentially suspending and transporting a plurality of seed storage containers over the two baths, A plurality of seed storage containers are sequentially moved from the hot water disinfection tank to the cooling tank by the transport operation of the transport device, and the seed hot water disinfection and cooling are continuously performed. In this way, it is possible to sequentially put a small amount of seeds into the hot water disinfection tank or cooling tank without putting a large amount of seeds into the hot water disinfection tank or cooling tank at once. Strict temperature control is possible by suppressing temperature changes. In addition, by dividing the seeds, hot water or cold water can quickly penetrate into the center, and the processing temperature can be made uniform. Moreover, since the seed storage container is continuously conveyed from the hot water disinfection tank to the cooling tank, not only the work efficiency is improved, but also the hot water immersion time and the cold water immersion time can be strictly managed.
Moreover, when the said seed storage container is transferred from a hot water disinfection tank to a cooling tank, the transfer assistance means which makes the moving speed of a seed storage container faster than the conveyance speed of a conveying apparatus is provided. If it does in this way, since the transfer time from a hot water disinfection tank to a cooling tank can be shortened, the inconvenience which arises in a variation in temperature processing in the process of moving from a hot water disinfection tank to a cooling tank can be avoided.
In addition, the transport device includes a swingable hanger that suspends the seed storage container and a transport chain that transports the hanger laterally, and the transfer assisting means fixes the upper end side of the hanger. It is characterized in that the lower end side of the hanger is forcibly swung to the transport downstream side by abutting on the part. If it does in this way, the conveyance speed of a seed storage container can be accelerated with a comparatively simple composition.
In addition, a plurality of spouts for ejecting hot water or cold water from below toward the seed storage container moving in the tank are provided along the moving direction of the seed storage container. If it does in this way, warm water and cold water can osmose | permeate to the center part of a seed storage container, and the temperature processing can be made more uniform.

  Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1 to FIG. 4, reference numeral 1 denotes a hot water disinfection device for disinfecting seed potatoes. 3, a cooling tank 4, a transfer device 5 provided on a beam portion of the carriage frame 2, and the like.

  The hot water disinfection tank 3 and the cooling tank 4 are both open water tanks. The hot water disinfection tank 3 is filled with hot water of about 60 ° C., and the cooling tank 4 is cold water of about 17 ° C. to 20 ° C. Is put. In this embodiment, about 4 kg of seed pods are stored in a cocoon storage bag 6 (a seed storage container that allows inflow of hot water or cold water) consisting of a net bag with a hanging string, and this is immersed in the hot water disinfection tank 3 for about 10 minutes. Thereafter, the seed tank is sterilized by cooling in the cooling tank 4 for about 7 minutes. In this embodiment, when the hot water disinfection tank 3 and the cooling tank 4 are connected on the bogie frame 2, the hot water disinfection tank 3 and the cooling tank 4 are offset to one side of the bogie frame 2. Work step 7 is secured on the other side of 2.

  As shown in FIGS. 1-5, the conveying apparatus 5 is a chain conveyor provided over both tanks 3 and 4 and is driven by a conveying motor 8 through a chain transmission mechanism 8a. A plurality of driven sprockets 10, an endless transport chain 11 suspended from the drive sprocket 9 and the driven sprocket 10, and a plurality of hangers 12 connected to the transport chain 11 at a predetermined interval. The plurality of hangers 12 are moved at a low speed (a speed that makes one round in 40 minutes) along the oval-shaped conveyance path in plan view in accordance with the driving of the conveyance motor 8. It is preferable that the moving speed of the hanger 12 can be adjusted according to the material to be processed. For example, when warm rice is treated with hot water for about 10 minutes, the moving speed is about 300 mm per minute. When other seeds are treated with hot water, the moving speed is increased or decreased according to the appropriate hot water treatment time.

  The upper end of the hanger 12 is connected to the transport chain 11 via a hanger bracket 13. The hanger bracket 13 includes a guide roller 14 that supports the suspension load of the hanger 12, and supports the hanger 12 through a support shaft 15 so as to be swingable back and forth. Further, the lower end portion of the hanger 12 is formed in an inverted T shape, and hooks 12a for suspending the bag storage bag 6 are provided at both ends thereof. Note that the member denoted by reference numeral 16 shown in FIG. A roller rail on which the roller 14 rolls and is formed in an oval shape in plan view.

  The transport device 5 configured as described above passes the bag storage bag 6 hooked on the hanger 12 (hook 12a) on the front side of the hot water disinfection tank 3 through the hot water disinfection tank 3 and the cooling tank 4, It is conveyed to the rear of the cooling tank 4. That is, the seed soup in the basket storage bag 6 suspended on the hanger 12 moves in the hot water disinfection tank 3 over a predetermined time (about 10 minutes) in accordance with the transport operation of the transport device 5, thereby performing hot water disinfection treatment. Then, it is transferred into the cooling tank 4 and cooled by moving in the cooling tank 4 over a predetermined time (about 7 minutes).

  The transfer device 5 according to the present embodiment is configured to control the movement speed of the bag storage bag 6 when transferring the bag storage bag 6 from the hot water disinfection tank 3 to the cooling tank 4 or when transferring it from the cooling tank 4 to the outside of the tank. The transfer assisting means for making the speed faster than the transport speed (transport chain speed) of 5 is provided. In this way, since the transfer time from the hot water disinfection tank 3 to the cooling tank 4 and the transfer time from the cooling tank 4 to the outside of the tank can be shortened, even in the same bag storage bag 6, the hot water (or cold water) comes out first. The time difference between the part and the part that comes out later can be made as small as possible, and the variation in the processing temperature in the bag storage bag 6 can be suppressed.

  The transfer assist means of the present embodiment is an angle adjustment roller 17 (fixed portion) provided in a fixed manner on the upper end movement locus of the hanger 12, and the upper end portion of the hanger 12 is brought into contact with the angle adjustment roller 17. The lower end side of the hanger 12 is forcibly swung to the downstream side of conveyance. If it does in this way, the conveyance speed of bag storage bag 6 can be sped up by the comparatively simple composition using the principle of leverage. In the present embodiment, inclined guides 3 a and 4 a for guiding the transfer of the bag storage bag 6 are formed at the end portions of the hot water disinfection tank 3 and the cooling tank 4.

  Next, equipment provided in the hot water disinfection tank 3 and the cooling tank 4 will be described with reference to FIGS. 3, 4, 7, and 8. The hot water sterilization tank 3 includes hot water jetting means for jetting hot water from below toward the bag storage bag 6 moving in the hot water sterilization tank 3, hot water heating means for heating the hot water in the hot water sterilization tank 3, Hot water temperature reducing means for reducing the temperature of hot water in the hot water disinfection tank 3, hot water temperature detection means for detecting the temperature of hot water in the hot water disinfection tank 3, control means for controlling the hot water warming means and the hot water temperature reducing means, Hot water supply means for supplying hot water to the hot water disinfection tank 3 and overflow processing means for processing hot water overflowing from the hot water disinfection tank 3 are provided.

  The hot water jetting means of this embodiment includes a suction pipe 19 that sucks hot water in the hot water disinfection tank 3 through a filter 18, a pump 21 that sends the sucked hot water to the circulation pipe 20, and a predetermined interval between the circulation pipe 20. And a plurality of jet outlets 22 provided. And since the circulation pipe 20 is arrange | positioned along the moving direction of the bag storage bag 6, and spouts warm water toward the upper bag storage bag 6 from the some jet nozzle 22, it is warm water to the center part of the bag storage bag 6. In addition, the hot water temperature in the tank can be made uniform by the action of stirring the hot water.

  The hot water heating means of the present embodiment includes a heat exchange pipe 23 that is piped to the bottom of the hot water disinfection tank 3, a boiler 24 that supplies high temperature water to the heat exchange pipe 23, and high temperature water that is supplied to the heat exchange pipe 23. And a proportional control valve 25 for adjusting the flow rate of the gas. If it does in this way, not only the warm water in the warm water disinfection tank 3 can be heated uniformly and quickly by the heat exchange method, but also the warming adjustment with high accuracy by the proportional control valve 25 becomes possible.

  The hot water temperature reducing means of this embodiment includes a perforated cold water supply pipe 26 that additionally supplies cold water from the upper part of the hot water disinfection tank 3, and a proportional control valve 27 that adjusts the flow rate of the cold water supplied to the cold water supply pipe 26. It is configured with. In this way, not only the temperature of the hot water can be reduced with a relatively simple configuration, but also the temperature reduction can be adjusted with high accuracy by the proportional control valve 27.

  The hot water temperature detection means of the present embodiment is a temperature sensor 28 disposed in the hot water disinfection tank 3, and the temperature detected by the temperature sensor 28 is input to the control means. The control means of the present embodiment is composed of a controller 29 having a PID control function and a temperature adjuster, and hot water according to the detected temperature of the temperature sensor 28 so that the hot water temperature in the hot water disinfection tank 3 becomes an appropriate temperature. Control of the heating means (proportional control valve 25) and hot water temperature reducing means (proportional control valve 27) is performed. If it does in this way, not only the warm water in the hot water disinfection tank 3 is adjusted for warming, but also the temperature is adjusted for temperature control, which enables speedy and highly accurate temperature control. In addition, the control system of a warm water heating means and a warm water temperature reduction means is not restricted to PID control, and an arbitrary control system can be applied.

  The hot water replenishing means of the present embodiment includes a hot water replenishing pipe 30 piped in the hot water disinfection tank 3, and a manual valve (not shown) interposed in the hot water supply path of the hot water replenishing pipe 30, Hot water is supplied into the hot water disinfection tank 3 in accordance with the opening / closing operation of the manual valve. Moreover, the overflow processing means of this embodiment is provided with the upper end edge part of the hot water disinfection tank 3, and is equipped with the tub 31 connected to the hot water sterilization tank 3 through the hole 31a, and the drain pipe 32 connected to the tub 31. It is configured. Moreover, in this embodiment, the hot water or cold water is replenished in the hot water disinfection tank 3 so that overflow always occurs, whereby the waste floating in the hot water disinfection tank 3 is discharged through the basket 31 and the drain pipe 32. I am doing so.

  In the cooling tank 4, cold water jetting means for jetting cold water from below toward the bag storage bag 6 moving in the cooling tank 4, cold water cooling means for cooling the cold water in the cooling tank 4, A cold water supply means for supplying cold water and an overflow processing means for processing the cold water overflowing from the cooling tank 4 are provided.

  The cold water jetting means of the present embodiment has a predetermined interval between the suction pipe 34 that sucks the cold water in the cooling tank 4 through the filter 33, the pump 36 that sends the sucked cold water to the circulation pipe 35, and the circulation pipe 35. And a plurality of jet outlets 37 provided. And the circulation pipe 35 is arrange | positioned along the moving direction of the bag storage bag 6, and since cold water is spouted toward the upper bag storage bag 6 from the several jet nozzle 37, cold water is carried out to the center part of the bag storage bag 6. In addition, the temperature of the cold water in the tank can be made uniform by the action of stirring the cold water.

  The cold water cooling means of the present embodiment includes a suction pipe 38 for sucking hot water in the hot water disinfection tank 3 through the filter 33, a cooling device (chiller) 39 for cooling the sucked cold water, and the cooled cold water in the cooling tank. 4 and a cold water reduction pipe 40 that is returned to the inside. In this way, the chilled water in the cooling tub 4 can be actively cooled by the cooling device 39, so that it is not only affected by changes in the water temperature of the tap water, but also at large temperature changes due to the introduction of the bag storage bag 6. Respond quickly and maintain cold water at an appropriate temperature.

  The cold water supply means of the present embodiment includes a cold water supply pipe 41 piped in the cooling tank 4 and a manual valve (not shown) interposed in the cold water supply path of the cold water supply pipe 41. In accordance with the opening / closing operation of the manual valve, cold water is supplied into the cooling tank 4. In addition, the overflow processing means of the present embodiment is provided with an upper edge of the cooling tank 4 and a ridge 42 communicating with the cooling tub 4 through a hole 42a, and a drain pipe 43 connected to the ridge 42. ing. In the present embodiment, in order to always cause overflow, the cooling tank 4 is replenished with cold water so that the dust floating in the cooling tank 4 is discharged through the gutter 42 and the drain pipe 43. .

  In the hot water disinfection apparatus 1 according to the present embodiment, the upper part of the hot water disinfection tank 3 is covered with the cover 44 to prevent the diffusion of steam rising from the hot water disinfection tank 3 and the inside of the cover 44 through the exhaust duct 45. The steam is exhausted. The cover 44 has a slit 44a facing the conveyance direction of the hanger 12 in the upper portion, and interference with the hanger 12 is avoided by the slit 44a. Further, on the work step 7 side of the cover 44, there is provided a door 44b that is opened and closed with the lower end portion as a rotation fulcrum (hinge). When the door 44 is opened, the door 44b is opened through a maintenance opening formed in the cover 44. Thus, maintenance in the hot water disinfection tank 3 becomes possible. In addition, glass windows 46 and 47 for confirming the state in the tank are provided on the side surfaces of the hot water disinfection tank 3 and the cooling tank 4.

  Next, the flow of work in the hot water disinfection facility will be described with reference to FIG. As shown in this figure, the hot water sterilization facility was sterilized with hot water using the seed sachet bagging device 48 for stuffing seed candy into the bag storage bag 6, the hot water sterilization device 1 according to the embodiment of the present invention, and the hot water sterilization device 1. The apparatus includes a dehydration processing device 49 that dehydrates the seed pod and a seed pod dehumidifier 50 that dehumidifies the dehydrated seed pod.

  In the case of disinfecting hot water with hot water in a facility configured in this way, first, the raw material is introduced into the seed material input unit 51 of the seed material bag filling device 48. The seeds thrown here are lifted by the hopper 53 via the whipping cylinder 52. A hanger 54 for hooking the bag storage bag 6 in an open state is provided at the bag discharge portion of the hopper 53. By discharging a predetermined amount (4 kg) of the seed bag into the bag storage bag 6 hooked there, the bag of the seed bag is discharged. Stuffing is performed.

  Next, the bag storage bag 6 filled with seeds is carried to the hot water disinfection device 1, and the bag storage bag 6 is hooked on the hook 12 a of the hanger 12 at the transfer start position of the transfer device 5. This operation is sequentially repeated every time the empty hanger 12 returns. The bag storage bag 6 hooked on the hanger 12 is first subjected to hot water disinfection treatment by moving in the hot water disinfection tank 3 over a predetermined time (about 10 minutes) according to the transport operation of the transport device 5, and then It is transferred into the cooling tank 4 and cooled by moving in the cooling tank 4 over a predetermined time (about 7 minutes). After that, when transported to the outside of the cooling tank 4, the bag storage bag 6 is removed from the hanger 12. This operation is repeated every time the basket storage bag 6 is discharged from the cooling tank 4.

  Next, the bag storage bag 6 that has been processed by the hot water disinfection device 1 is transported to the dehydration device 49 and placed in the dehydrator 55 for dehydration. After the dehydration, the soot storage bag 6 is placed on the dehumidifying carriage 56 and carried to the seed soup dehumidifying device 50. Then, when the dehumidifying trolley 56 is carried into the budding chamber (dehumidifying chamber) 57 of the seed and dehumidifier 50 and dehumidified for a predetermined time, a series of operations is completed.

  According to the present embodiment configured as described, the hot water disinfection apparatus 1 includes a hot water disinfection tank 3 for disinfecting seeds by immersing the seeds in warm water and a cooling tank 4 for immersing the seeds subjected to the hot water disinfection in cold water to cool the seeds. In addition, the hot water disinfection tank 3 and the cooling tank 4 are connected in series, and a transport device 5 is provided for sequentially suspending and transporting a plurality of basket storage bags (seed storage containers) 6 over both the tanks 3 and 4. Since the plurality of basket storage bags 6 are sequentially moved from the hot water sterilization tank 3 to the cooling tank 4 by the transfer operation of the transfer device 5, seed hot water sterilization and cooling are continuously performed. Without putting into the hot water disinfection tank 3 or the cooling tank 4 at once, the subdivided soot can be sequentially put into the hot water disinfection tank 3 or the cooling tank 4, and as a result, the rapid temperature in the hot water disinfection tank 3 or the cooling tank 4 Strict temperature control becomes possible by suppressing changes. In addition, by dividing the seed potatoes, hot water or cold water can quickly penetrate into the center, and the processing temperature can be made uniform. Moreover, since the bag storage bag 6 is continuously conveyed from the hot water disinfection tank 3 to the cooling tank 4, not only the work efficiency is improved, but also the hot water immersion time and the cold water immersion time can be strictly managed. .

  Further, when the basket storage bag 6 is transferred from the hot water sterilization tank 3 to the cooling tank 4, a transfer assisting means for making the moving speed of the basket storage bag 6 faster than the transfer speed of the transfer device is provided. The transfer time to the tank 4 can be shortened. As a result, it is possible to avoid the inconvenience that the temperature treatment varies in the process of moving from the hot water disinfection tank 3 to the cooling tank 4.

  In addition, the transport device 5 includes a swingable hanger 12 that suspends the bag storage bag 6 and a transport chain 11 that transports the hanger 12 in the lateral direction. Since the lower end side of the hanger 12 is forcibly swung to the downstream side of conveyance by bringing the upper end side into contact with the angle adjusting roller 17, the bag storage bag 6 can be conveyed with a relatively simple configuration. You can speed up.

  In addition, since a plurality of spouts 22 and 37 for jetting hot water or cold water from below toward the bag storage bag 6 moving in the tank are provided along the movement direction of the bag storage bag 6, the center of the bag storage bag 6 Warm water or cold water can be permeated to the part to further uniform the temperature treatment.

  Also, hot water warming means for warming the hot water in the hot water disinfection tank 3, hot water temperature reducing means for reducing the hot water in the hot water disinfection tank 3, and hot water temperature detection for detecting the hot water temperature in the hot water disinfection tank 3. Means and a control means for controlling the hot water warming means and the hot water temperature reducing means so that the hot water temperature in the hot water disinfection tank 3 becomes an appropriate temperature, so that only warm water in the hot water disinfection tank 3 is heated. In addition, the temperature of the hot water can be reduced, and as a result, speedy and highly accurate temperature control becomes possible.

  The hot water heating means is configured to flow high-temperature water through the heat exchange pipe 23 in the hot water sterilization tank 3, and the hot water temperature reducing means is configured to additionally supply cold water into the hot water sterilization tank 3. Depending on the method, the hot water in the hot water disinfection tank 3 can be heated uniformly and quickly, and the temperature of the hot water can be reduced with a relatively simple configuration.

  Further, in providing the cooling tank 4 for cooling the seed sterilized with hot water by immersing it in cold water, the cold water in the cooling tank 4 is circulated through the cooling device 39 and maintained at an appropriate temperature. Not only is it unaffected by changes in water temperature, but it can also quickly respond to large temperature changes accompanying the introduction of the bag storage bag 6 and maintain cold water at an appropriate temperature.

It is the whole hot water disinfection apparatus side view. It is the whole hot water disinfection apparatus top view. It is the whole hot water disinfection apparatus front view which shows a hot water disinfection tank as a cross section. It is the whole hot water disinfection apparatus rear view which shows a cooling tank as a cross section. It is an enlarged side view which shows the transfer part from a hot water disinfection tank to a cooling tank. It is an expanded sectional view which shows a conveying apparatus. It is a block diagram which shows the temperature control system of a hot water disinfection tank. It is a conceptual diagram which shows the temperature control system of a hot water disinfection tank and a cooling tank. It is explanatory drawing which shows the flow of work in a hot water disinfection facility.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water disinfection apparatus 2 Carriage frame 3 Hot water disinfection tank 4 Cooling tank 5 Conveying device 6 Bag storage bag 12 Hanger 17 Angle adjustment roller 22 Jet outlet 23 Heat exchange pipe 24 Boiler 25 Proportional control valve 26 Cold water supply pipe 27 Proportional control valve 28 Temperature Sensor 29 Controller 37 Spout 39 Cooling device

Claims (4)

  A hot water disinfection apparatus comprising a hot water disinfection tank for disinfecting seeds by immersing the seeds in hot water and a cooling tank for cooling the seeds subjected to hot water disinfection in cold water, wherein the hot water disinfection tank and the cooling tank are connected in series. A transport device that sequentially holds and transports a plurality of seed storage containers over the tank is provided, and the plurality of seed storage containers are sequentially moved from the hot water disinfection tank to the cooling tank by the transport operation of the transport apparatus. A hot water disinfection device characterized by continuously performing hot water disinfection and cooling of seeds.   2. The hot water disinfection apparatus according to claim 1, further comprising a transfer assisting means for making the moving speed of the seed storage container faster than the transfer speed of the transfer apparatus when transferring the seed storage container from the hot water disinfection tank to the cooling tank. .   The transport device includes a swingable hanger that suspends the seed storage container, and a transport chain that transports the hanger in the lateral direction, and the transfer assisting means uses the upper end side of the hanger as a fixed portion. 3. The hot water disinfection apparatus according to claim 2, wherein the lower end side of the hanger is forcibly swung to the downstream side of conveyance by abutting.   4. A plurality of spouts for jetting hot water or cold water from below toward the seed storage container moving in the tank are provided along the moving direction of the seed storage container. The hot water disinfection device described.

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