Patent Application
20200245598
This application claims priority to The Netherlands Patent Application No. 2022515 filed Feb. 5, 2019, the disclosure of which is hereby incorporated by reference in its entirety.
The present invention relates to a novel design for a perch for poultry on which the presence of poultry mite can be decreased. The invention also relates to a method for sanitizing an accommodation for poultry, a sanitization system, and a joining piece suitable for such a perch.
The poultry mite (Dermanyssus gallinae, also called the red mite) is the most significant pest in the poultry industry. This pest causes considerable damage in poultry farming and affects the health and well-being of people and animals. In professional poultry farming in the Netherlands, the damage is valued at around €11.5 million per year due to production losses and countermeasure costs. To safeguard the production and the well-being and health of poultry, it is important to combat and to control poultry mite.
The use of pesticides is of only limited effectiveness in practice, since the mites spend most of the day in holes and cracks, and the likelihood of effective contact with the pesticide is therefore low. Furthermore, the mite quickly develops resistance to pesticides, and the use of relatively strong pesticides is a threat to public health and thus undesirable.
For this reason, practical methods are sought in the industry that make it possible physically to repel or to eliminate poultry mite from locations where poultry spend the most time in a poultry shed, such as the perches for poultry. On perches, the risk of poultry mite visiting the poultry is relatively high: for most of the day the poultry mite hide in dark corners and gaps in the perches or the supporting structures thereof, while often at night, when the poultry are roosting on the perch and it is dark, the poultry mite move onto the poultry and feed parasitically on the poultry's blood.
Physically removing poultry mite from a poultry shed daily at an effective time is therefore in principle of interest as a method for further limiting the risk to the poultry. In practice, there is a need in this context for a practical, workable method that is economically attractive for implementation in a poultry shed which houses a great many metres of perches.
The object of the invention is therefore to develop an economically attractive and effective method for ridding poultry of poultry mite. In particular, the object of the invention is to provide a perch that is specifically designed to allow the method to be applied, wherein the perch preferably forms part of a sanitization system for carrying out this method. It is additionally important for the sanitization method according to the invention to trouble or to disturb the poultry as little as possible.
Although the measures according to the invention are primarily designed for combating poultry mite, it is also possible for these measures to be used against other parasites, preferably against parasites that exhibit similar behaviour.
According to a first aspect of the invention, this objective is achieved by providing a perch for poultry to be placed in a room for accommodating poultry, comprising at least one elongated tube with an inner chamber allowing flow-through, which tube is provided with a series of access channels that run between the outside of the tube and the inner chamber of the tube. The tube's inner chamber allowing flow-through may be connected to the intake connection of an air pump.
This measure provides the poultry mite with the opportunity to hide during the day in small chambers, such as the interior of the tube. It is then straightforward to remove the populations of poultry mite or other parasites from the interior of the tube.
Preferably, the access channels have a smallest cross section of between 1 and 10 mm2 and the access channels are arranged in the tube according to a regular pattern. Most preferably, the access channels are round and have a diameter of 3 mm. In this way, the poultry mite are given a sufficient degree of access to the interior of the tube, thus preventing the poultry mite from hiding elsewhere in the room in which the poultry are accommodated. The number of access channels per length of tube is chosen according to the specific situation.
Preferably, the wall thickness of the tube is between 0.8 mm and 1.5 mm, and is most preferably 1.25 mm. In this way, the tube is sturdy enough for catchers to stand on during catching of the poultry and the access channel is long enough for the interior of the tube to provide the poultry mite with sufficient shelter. These dimensions assume a steel embodiment of the tube. It is however highly conceivable for the tube to be made of plastic, in which case a greater wall thickness is necessary, possibly even up to 5 mm.
The access channels may be arranged at the same distance from one another, but it is advantageous for the access channels to be positioned in proximity to the mounting points of the perches. When, in the dawn twilight, the poultry mites seek a place to hide, they will move to the mounting points and pass the access channels.
To clarify, it should be noted that the access channel is aimed at luring in poultry mite or another parasite, since poultry mite naturally seek out a dark hiding place, such as the interior of the perch. Indeed, there is no more attractive hiding place for the poultry mite on the perch than the inner chamber of the tube openings in the tube accessed through the access channels. To increase the attractiveness for the poultry mite, pheromones may be applied in the hiding place. Once the mite is in its hiding place, the inner chamber of the perch can be sucked clear by a sanitation system discussed below and the poultry mite thereby removed.
It is also advantageous for the tube to be provided with sloping surfaces that face outwards in the upwards direction and for the access channels to be configured as openings arranged in the narrow, sloping surfaces of the tube. In this way, the blocking of the access channels by the poultry's droppings is prevented. Additionally and preferably, the tube has a cross section in the shape of an isosceles triangle with rounded corners, the tube is positioned with the widest side facing upwards and the access channels are configured as openings arranged in the narrow, sloping surfaces of the tube. The width of the tube provides the poultry with sufficient comfort for their feet when perching and the sloping sides remain mostly in the shade, so that the interior of the tube is dark. However, the tube may take another shape, such as a round, elliptical or mushroom shape.
To keep the perches managable during installation and to prevent sagging, the perch preferably comprises at least two tubes that are positioned in line with one another, the inner chambers of which are connected to one another by a joining piece that extends on the outside of the tubes and joins both tubes together with an airtight seal. The airtight seal makes it possible to remove the poultry mites from the interior of the tube by means of air movement.
To remove the poultry mites, it is advantageous for a first end of the perch to comprise a connecting piece that is configured for connection to a suction air pump. By switching on the air pump, an airflow that carries the poultry mites along with it can be created in the interior of the tube.
To obtain a high airspeed in the tube, which is desirable for carrying the poultry mite away, the tubes are preferably connected to the air pump in succession. According to a preferred embodiment, the connecting piece is therefore provided with a controllable valve.
The invention further relates to a perch unit for poultry to be placed in a room for accommodating poultry, comprising a series of perches according to one of the preceding claims running parallel to one another and a frame that supports and connects the perches to one another.
The invention also relates to a sanitization system for a poultry accommodation, comprising at least one perch of the abovementioned type, wherein the connecting piece of each perch is connected to a central discharge line and wherein the central discharge line is connected downstream to a pump that is configured to create a reduced pressure in the discharge line. As a result, an airflow is created that carries the poultry mites along with it from the inside of the perch to a treatment room via the central discharge line.
As an alternative to the local valves that are each connected to a perch as described above, it is also possible for the intake side of the air pump to be connected to a common outlet connection of a controllable multiway valve and for the inlet connections of the multiway valve each to be connected to a perch. This embodiment affords the possibility of the valve being sited in a central location.
A special measure proposes a sanitization system of the type described above, wherein a main valve is provided on the central discharge line, upstream from the treatment chamber, and wherein an overpressure line is connected to the central discharge line via a return valve so as to create an increased pressure in the perch.
For the sake of clarity, it should be noted that, in the context of the invention, the terms “downstream” and “upstream” refer to the direction of the extracting airflow that flows from the perch to the treatment chamber, and ultimately the pump, via the central discharge line.
The invention also relates to a method for sanitizing an accommodation for poultry that is provided with a sanitization system of the abovementioned type, wherein a reduced pressure is created in the interior of the perch by the pump and the poultry mite present in the interior of the perch is carried along thereby.
A preferred embodiment proposes a method wherein the end of the perch opposite the connected end is provided with a controllable shut-off valve, and pumping is initially effected with the shut-off valve closed and the shut-off valve is subsequently opened.
In this way, the population of poultry mite that is present in the joining piece and around the access channel is first sucked further into the inner chamber of the perch, wherein a relatively low extraction speed prevails in the inner chamber of the perch itself and the poultry mite remains in the tube. Next, after the end valve has been opened, a higher extraction speed is created in the inner chamber of the perch, by means of which all poultry mite present are sucked away to the treatment chamber via the central discharge line.
The invention will the explained in greater detail below by means of a specific embodiment of the invention as is illustrated in the appended figures, which show:
An elongated groove 38 is present as the access channel between the two entrances 28, which are surrounded by sleeve 40. When the respective ends of connected tubes are inserted into the respective end segments 34, the groove 38 will be in open communication with the inner chamber 30 of the joining piece 24 at the location of the middle segment 36, and thus the access channel 38 will run from the outside of the joining piece to an inner chamber of the joining piece. The channel 38 thus allows an airflow between the outside of a perch and the inner chamber of a perch.
The underside of the joining piece is provided with a profile 48 combined with a small steel tube 46 that acts as a reinforcing structure for the joining piece. The small tube 46 bridges the middle segment 36 and thus forms a rigid bridging part between the two ends of tubes that are connected to the two respective end segments 34. This reinforcing structure makes it possible for the rest of the joining piece to be formed from an elastomer which is advantageous for contacting tubes in a clamping manner, while the joining piece as a whole provides sufficient rigidity and strength as a component of the perch.
Inside the second part 54 of the sanitization system, which is optionally arranged outside the poultry shed, the discharge line 7 leads, after passing main valve 9, through a cyclone filter 58, which also acts as a treatment chamber for killing poultry mite. To this end, the cyclone 58 is provided with features for subjecting the poultry mite to a treatment, such as exposure to hot air, hot water, electricity, UV radiation, water and soap or pesticides, or a combination thereof. Depending on the required capacity of the sanitization system, additional cyclones may be arranged in series with cyclone 58, which may or may not be provided with the abovementioned features.
The discharge line 7 then leads to a pump 60 for creating a reduced pressure in the discharge line 7. The pump 60 creates an extracting airflow from the inside of a selected perch 1, the valve 11 of which is opened, to the treatment chamber 58 via the central discharge line 7. Behind the pump 60, the pumped-out air is passed into the outside air via end 70 of line 7. When applying a reduced pressure in the sanitization system, the non-return valves 56 close those perches, the valves 11 at the first end of which are not open, off at the other, second end too, such that the reduced pressure can only be present in a selected perch.
Downstream of the pump 60, an overpressure line 62 is provided which is connected to the return valve 64, so as to be able to create a reverse, expelling airflow in the first part of the sanitization system 52 with perches. By closing the main valve 9 and the first auxiliary valve 66, and opening second auxiliary valve 68, air is drawn in from the end 70 in order to purge the sanitization system using pump 60 via return valve 64.
The above sanitization system provides an adequate and practical means for the periodic, and preferably daily, removal of poultry mite from perches.
The joining pieces 24 between the tubes 21, 22 of a perch 1 provide a hiding place for poultry mite during (day)light hours in the poultry shed. The pump 60 is activated at least once a day, whereby a reduced pressure is created in the inner chamber of the perch so that as many mites as possible in the vicinity of the entrances 28 into the access channels are sucked into the inner chamber, where a considerable number of poultry mites are already hiding. By then opening the end valve 15, a stronger extracting airflow can be created, by means of which the poultry mite are carried into the treatment chamber, in this case cyclone 58, via the discharge line 7, where they are killed. After these actions, the majority of poultry mite have been removed from the perches, and the health risk to the poultry has been greatly reduced.
It is furthermore possible within this system for the removal of poultry mite to be carried out per individual perch, and for this to be carried out on a timer and to be automated.
Once all of the perches have been sanitized, a brief, sharp expelling airflow can be sent through each perch by the pump 60 via overpressure line 62 and by opening return valve 64. This step is intended to prevent the access channels 38 from becoming clogged or blocked in any way by sticky substances such as poultry droppings. Such a system may be self-cleaning, and thus requires little maintenance. The non-return valves 56 ensure that the expelling air flow escapes only via the access channels 38, and thus that a sharp, effective airflow is obtained so as to purge the access channels 38.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2022515 | Feb 2019 | NL | national |
