Permeation tube for measuring methane emission of ruminant rumen

Abstract

The utility model relates to the technical field of measuring ruminant rumen methane emission, in particular to a permeation tube for measuring ruminant rumen methane emission, which comprises a nut, a filter disc, a permeation membrane, a gasket and a tube body, and an external thread is arranged outside one end of the nut; the tube body is in a hollow cylindrical shape, one end of the tube body is closed, the other end of the tube body is open and is provided with an internal thread, the nut is spirally connected with the tube body, the filter disc, the permeable membrane and the gasket are sequentially arranged at the end, close to the nut, in the tube body, the permeation tube has more SF6 gas loading capacity and longer slow release time, operation is more convenient and faster, and the permeation tube is suitable for being used in the field of SF6 gas storage. The weight error caused by abrasion in the screwing process is reduced, the sealing performance is better, the gas filling efficiency is higher, the appearance is smoother, and the injury degree to animals in the feeding process is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of determination of ruminant rumen methane emission, and particularly relates to a permeation tube for determining ruminant rumen methane emission. BACKGROUND

[0002] Climate change is destroying the natural and human systems on which people rely to maintain health. Methane, as the second largest greenhouse gas leading to global warming, has a global warming potential of 83 times that of carbon dioxide on a time scale of 20 years. With the continuous increase of the world population, the number of animals, and the high-quality development of industrialization and mechanization, the corresponding CH4 emission is also increasing, which will inevitably accelerate global warming and exacerbate its threat to human health. Global 16% of CH4 emission comes from ruminants, and about 73% of CH4 emission in agricultural production comes from livestock. Methane produced by fermentation in the gastrointestinal tract of ruminants not only causes 2%-12% of feed energy waste, but also is the main source of CH4 emission in agricultural production. However, how to accurately determine the CH4 emitted by ruminants is the primary condition for realizing methane emission reduction, especially according to the actual situation of our country to determine the CH4 emission of different breeds of ruminants. In addition, the determination of ruminant methane emission in China started late, and the obtained methane emission measured value is very scarce. Combined with the fact that there are many local characteristic ruminant breeds in China, the CH4 emission data is even blank. This makes IPCC use prediction models to estimate when evaluating the methane emission of ruminants in China, resulting in the greenhouse gas emission of China being seriously overestimated.

[0003] Among the methods for determining ruminant methane, the sulfur hexafluoride (SF6) tracer technology can be used for ruminants in free grazing and feeding, and is widely used in many scientific researches. The core of SF6 tracer technology is the preparation of permeation tube. The existing permeation tube for cattle and sheep has a small SF6 loading capacity, a short slow-release time, and is difficult to be applied to animal experiments with a long test period. Moreover, the operation process is complicated and at least two technicians are required to cooperate to complete the SF6 filling and sealing work, and the filling efficiency is extremely low. In view of the above shortcomings of the permeation tube, the utility model provides a permeation tube for determining ruminant rumen methane emission, which has more SF6 gas loading capacity, longer slow-release time, more convenient and fast operation, reduces the weight error caused by abrasion during twisting, technicians can independently complete the preparation of the whole permeation tube, has better sealing performance, higher gas filling efficiency, smoother outer surface, and reduces the degree of injury to animals during feeding. SUMMARY

[0004] The utility model provides a kind of permeation tube for determining ruminant rumen methane emission, the permeation tube includes nut 1, filter disc 2, permeation membrane 3, gasket 4 and pipe body 5, the outer portion of the nut 1 one end is provided with external thread;The pipe body 5 is hollow cylindrical, one end is closed, the other end is open, is provided with internal thread, the nut 1 and pipe body 5 spiral connection, the filter disc 2, permeation membrane 3 and gasket 4 are sequentially placed in pipe body 5 close to the one end of nut 1.

[0005] Preferably, the outer diameter of the pipe body 5 is 10-15mm; inner hole diameter is 4-9mm.

[0006] Preferably, the inner hole diameter depth of the pipe body 5 is 20-40mm.

[0007] Preferably, the pipe body 5 and nut 1 are prepared by brass.

[0008] Preferably, the filter disc 2 is stainless steel sintering.

[0009] Preferably, the permeation membrane 3 is Teflon membrane.

[0010] Preferably, the gasket 4 is nylon gasket.

[0011] Preferably, the height of the permeation tube is 25-45mm.

[0012] Preferably, the release rate of SF6 of the permeation tube is 0.6-15mg / d at 39℃.

[0013] The utility model has the advantages that: the utility model provides a kind of permeation tube for determining ruminant rumen methane emission, the permeation tube has more SF6 gas loading, longer sustained-release time, operation is more convenient and fast, reduces the weight error generated due to abrasion when screwing, better sealing, gas filling efficiency is higher, more smooth outer surface, reduces the injury degree to animal when feeding. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A kind of permeation tube for determining ruminant rumen methane emission

[0015] Figure 2 A kind of permeation tube for determining ruminant rumen methane emission

[0016] Note: 1. nut; 2. filter disc; 3. permeation membrane; 4. gasket; 5. pipe body DETAILED DESCRIPTION

[0017] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein like reference numerals refer to like elements or elements with similar functions throughout the figures. The embodiments described below are exemplary and intended to provide an explanation of the application, and are not intended to restrict the application.

[0018] Example 1, Preparation of a permeation tube for determining methane emissions from the rumen of a cow

[0019] As shown in Figure 1 and 2 The utility model provides a kind of permeation tube for determining methane emissions from the rumen of a cow, for determining the permeation tube comprising screw cap 1, filter disc 2, permeation membrane 3, gasket 4 and pipe body 5 are made of, the outer portion of screw cap 1 one end is provided with external thread;The pipe body 5 is hollow cylindrical, one end is closed, the other end is open, is provided with internal thread, the screw cap 1 and pipe body 5 spiral connection, the filter disc 2, permeation membrane 3 and gasket 4 are placed in pipe body 5 close to screw cap 1 one end in sequence, the outer diameter of the pipe body 5 is 13mm;Inner hole diameter is 7mm;The inner hole depth of the pipe body 5 is 30mm;Internal volume is 1.5ml;The pipe body 5 and screw cap 1 are prepared by brass, the filter disc 2 is stainless steel sintering, the permeation membrane 3 is Teflon membrane, the gasket 4 is nylon gasket, the height of the permeation tube is 35mm, the release rate of SF6 of the permeation tube is 2.5mg / d under 39 ℃, and SF6 loading capacity is 600mg.

[0020] Example 2, Preparation of a permeation tube for determining methane emissions from the rumen of a cow

[0021] As shown in Figure 1 and 2 The utility model provides a kind of permeation tube for determining methane emissions from the rumen of a cow, for determining the permeation tube comprising screw cap 1, filter disc 2, permeation membrane 3, gasket 4 and pipe body 5 are made of, the outer portion of screw cap 1 one end is provided with external thread;The pipe body 5 is hollow cylindrical, one end is closed, the other end is open, is provided with internal thread, the screw cap 1 and pipe body 5 spiral connection, the filter disc 2, permeation membrane 3 and gasket 4 are placed in pipe body 5 close to screw cap 1 one end in sequence, the outer diameter of the pipe body 5 is 15mm;Inner hole diameter is 9mm;The inner hole depth of the pipe body 5 is 40mm;Internal volume is 3ml;The pipe body 5 and screw cap 1 are prepared by brass, the filter disc 2 is stainless steel sintering, the permeation membrane 3 is Teflon membrane, the gasket 4 is nylon gasket, the height of the permeation tube is 45mm, the release rate of SF6 of the permeation tube is 15mg / d under 39 ℃, and SF6 loading capacity is 3000mg.

[0022] Example 3, Preparation of a permeation tube for determining methane emission of sheep rumen

[0023] As Figure 1 and 2 shown, the utility model provides a permeation tube for determining methane emission of sheep rumen for determining the permeation tube includes cap 1, filter disc 2, permeation membrane 3, gasket 4 and pipe body 5 constitute, the outside of one end of cap 1 is provided with external thread, the pipe body 5 is hollow cylindrical, one end is closed, the other end is open, is provided with internal thread, cap 1 and pipe body 5 spiral connection, filter disc 2, permeation membrane 3 and gasket 4 are in succession in the one end close to cap 1 of pipe body 5, the outer diameter of pipe body 5 is 10mm, the inner hole diameter is 4mm, the inner hole depth of pipe body 5 is 20mm, the internal volume is 0.3ml, pipe body 5 and cap 1 are prepared by brass, filter disc 2 is stainless steel sintering, permeation membrane 3 is Teflon membrane, gasket 4 is nylon gasket, the height of permeation tube is 25mm, the release rate of SF6 of permeation tube is 0.6mg / d under 39 DEG C, and SF6 loading is 150mg.

[0024] Example 4, Preparation of a permeation tube for determining methane emission of sheep rumen

[0025] As Figure 1 and 2 shown, the utility model provides a permeation tube for determining methane emission of sheep rumen for determining the permeation tube includes cap 1, filter disc 2, permeation membrane 3, gasket 4 and pipe body 5 constitute, the outside of one end of cap 1 is provided with external thread, the pipe body 5 is hollow cylindrical, one end is closed, the other end is open, is provided with internal thread, cap 1 and pipe body 5 spiral connection, filter disc 2, permeation membrane 3 and gasket 4 are in succession in the one end close to cap 1 of pipe body 5, the outer diameter of pipe body 5 is 10mm, the inner hole diameter is 4mm, the inner hole depth of pipe body 5 is 20mm, the internal volume is 0.3ml, pipe body 5 and cap 1 are prepared by brass, filter disc 2 is stainless steel sintering, permeation membrane 3 is Teflon membrane, gasket 4 is nylon gasket, the height of permeation tube is 25mm, the release rate of SF6 of permeation tube is 0.6mg / d under 39 DEG C, and SF6 loading is 150mg.

Claims

1. A permeation tube for measuring rumen methane emissions in ruminants, characterized in that, The permeation tube comprises a nut (1), a filter (2), a permeation membrane (3), a washer (4), and a tube body (5). The nut (1) has an external thread on one end. The tube body (5) is a hollow cylinder with one end closed and the other end open, and has an internal thread. The nut (1) and the tube body (5) are connected by a screw. The filter (2), the permeation membrane (3), and the washer (4) are placed in the tube body (5) in sequence near the end of the nut (1).

2. The permeation tube as described in claim 1, characterized in that, The outer diameter of the tube (5) is 10-15 mm; the inner diameter is 4-9 mm.

3. The permeation tube as described in claim 1, characterized in that, The inner hole depth of the tube body (5) is 20-40mm.

4. The permeation tube as described in claim 1, characterized in that, The tube body (5) and the nut (1) are both made of brass.

5. The permeation tube as described in claim 1, characterized in that, The filter element (2) is made of sintered stainless steel.

6. The permeation tube as described in claim 1, characterized in that, The permeation membrane (3) is a Teflon membrane.

7. The permeation tube as described in claim 1, characterized in that, The gasket (4) is a nylon gasket.

8. The permeation tube as described in claim 1, characterized in that, The height of the permeation tube is 25-45mm.

9. The permeation tube as described in claim 1, characterized in that, The SF6 release rate of the permeation tube at 39°C is 0.6-15 mg / d.

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