Device for measuring moisture absorption rate of granular fertilizer

Abstract

The utility model belongs to the technical field of fertilizer analysis and detection, and particularly relates to a device for measuring the moisture absorption rate of a granular fertilizer, which comprises a support frame and a plurality of sample loading components arranged on the support frame, each sample loading component comprises a cup sleeve and a sample cup, a plurality of through holes are uniformly distributed on the outer wall of each sample cup, and the through holes are communicated with the sample cups. A cup cover is arranged on an opening of the sample cup, and a lifting hook is arranged on the cup cover; and the outer side of the sample cup is sleeved with a cup sleeve. According to the measuring device, the problem that the moisture absorption rate cannot be accurately measured due to the fact that a sample is influenced by external air when being put into the constant-temperature and constant-humidity chamber or taken out of the constant-temperature and constant-humidity chamber and the weight of the sample is changed after the sample is influenced can be avoided, the consistency of the detection result and the actual moisture absorption condition is ensured, and the measurement deviation is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of fertilizer analysis and testing technology, and in particular relates to a device for determining the moisture absorption rate of granular fertilizer. Background Technology

[0002] The hygroscopic rate of granular fertilizer refers to the degree to which granular fertilizer absorbs moisture from the environment under proper protection and at a certain temperature and humidity. Hygroscopic rate is an effective evaluation indicator during the production, storage, and use of granular fertilizer. After absorbing moisture, fertilizer may clump or deteriorate, affecting its efficacy and ease of use. For example, if compound fertilizers or blended fertilizers absorb a lot of moisture, the nutrients may undergo chemical reactions, leading to the loss of effective components and affecting crop absorption and utilization. Furthermore, hygroscopic fertilizers are prone to clumping during storage, which makes fertilization difficult, affecting both mechanical and manual fertilization. Studies have shown that fertilizers with high hygroscopic rates can have a clumping rate of over 30% after a certain period of storage, significantly increasing fertilization costs and reducing fertilization efficiency.

[0003] Currently, there is no unified, accurate, and efficient device or method for testing the hygroscopicity of granular fertilizers. Traditional evaluation methods simply involve placing the fertilizer in an environment with specific temperature and humidity, and then visually assessing its hygroscopicity after a period of time. However, this method struggles to precisely control influencing factors such as environmental humidity, temperature, and sample placement. Furthermore, when testing in natural environments, temperature and humidity may fluctuate with weather changes, leading to inaccurate measurement results. Moreover, variations in airflow, temperature, humidity, and stacking pressure during actual storage and transportation of fertilizers result in inconsistent evaluation standards, causing discrepancies between test results and actual hygroscopicity. Therefore, standardizing measurement methods and evaluation criteria is essential for facilitating quantitative evaluation and communication.

[0004] With the development of the fertilizer industry, the demand for accurate testing of the moisture absorption rate of granular fertilizers is increasing. Manufacturers need accurate data to optimize fertilizer formulations and add appropriate moisture-proofing agents and other additives to reduce moisture absorption. In warehousing and logistics, accurate moisture absorption rate data helps determine reasonable storage conditions and packaging methods. For example, if the moisture absorption rate of a particular granular fertilizer can be accurately measured, suitable moisture-proof packaging materials, such as plastic films with good moisture barrier properties, can be selected based on its characteristics, thereby extending the fertilizer's shelf life and reducing fertilizer loss due to moisture absorption. Utility Model Content

[0005] In view of the technical problems existing in the background art, the present invention provides a device for measuring the moisture absorption rate of granular fertilizer.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] An apparatus for determining the moisture absorption rate of granular fertilizer includes a support frame and several sample loading components disposed on the support frame. The sample loading components include a cup sleeve and a sample cup. Several through holes are evenly distributed on the outer wall of the sample cup. A cup lid is disposed on the opening of the sample cup, and a hook is disposed on the cup lid. A cup sleeve is fitted over the outer side of the sample cup.

[0008] Optionally, the bottom end of the support frame is disposed on the base.

[0009] Optionally, the support frame is provided with a triangular support block, and the tip of the support block is detachably connected to a lifting ring assembly, and the hook is connected to the lifting ring assembly.

[0010] Optionally, the lifting ring assembly includes an upper ring body and a lower hook body, the upper ring body and the lower hook body are integrally manufactured, and a positioning block is provided at one end of the upper ring body; the tip of the support block is provided with a stepped hole, and the positioning block is inserted into the stepped hole.

[0011] Optionally, the positioning block and the stepped hole are both set to a regular polygon shape.

[0012] Optionally, a first positioning hole is provided on the inner wall at the junction of the upper ring body and the lower hook body, and a second positioning hole is provided inside the positioning block, with the first positioning hole and the second positioning hole facing each other; a threaded hole communicating with the stepped hole is provided on the support block, and a support screw is connected in the threaded hole, with one end of the support screw located in the second positioning hole and the other end passing through the first positioning hole.

[0013] Optionally, the support screw is provided with two nuts, which are respectively attached to the side walls of the upper ring and the lower hook; the support screw is provided with one nut, which is attached to the end of the support block.

[0014] Optionally, the sample cup has an opening at the top, the inner wall of the opening is provided with an internal thread, the outer wall of the opening is provided with a thread, the inner wall of the opening is threadedly connected to the outer wall of the lid, and the outer wall of the opening is threadedly connected to the inner wall of the sleeve.

[0015] Optionally, the bottom end of the cup sleeve is threaded with a bottom cover.

[0016] This utility model has the following advantages and beneficial effects:

[0017] This invention provides a device for measuring the moisture absorption rate of granular fertilizers. The combination of a sample cup and a cup sleeve facilitates the protective transport of samples. This device avoids the problem of the sample being affected by external air when placed in or removed from a constant temperature and humidity chamber, which could lead to weight changes and make it impossible to accurately measure the moisture absorption rate. This ensures that the test results are consistent with the actual moisture absorption and reduces measurement deviation. Attached Figure Description

[0018] Figure 1 This is a front view of the method for determining the moisture absorption rate of granular fertilizer in this utility model.

[0019] Figure 2 for Figure 1 Top view;

[0020] Figure 3 for Figure 1 A magnified view of a portion of point a.

[0021] Figure 4 This is a partial structural diagram of the sample cup in this utility model;

[0022] Figure 5 This is a cross-sectional view of the lifting ring assembly in this utility model.

[0023] Reference numerals: 1-base, 2-support frame, 3-support block, 31-stepped hole, 32-threaded hole, 4-upper ring body, 41-first positioning hole, 42-lower hook body, 43-positioning block, 431-second positioning hole, 5-cup lid, 51-hook, 6-cup sleeve, 7-sample cup, 71-through hole, 72-cup mouth, 8-bottom cover, 9-support screw, 91-nut one, 92-nut two. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Example

[0027] like Figures 1-5As shown, an apparatus for determining the moisture absorption rate of granular fertilizer includes a support frame 2 and several sample loading components mounted on the support frame 2. This invention includes three sample loading components. Each sample loading component includes a cup sleeve 6 and a sample cup 7, which work together. The outer wall of the sample cup 7 has several through holes 71 evenly distributed to facilitate air permeability and enable moisture absorption rate testing. The diameter of each through hole 71 must be larger than the diameter of the sample to prevent leakage. A cup lid 5 is provided on the opening of the sample cup 7, and a hook 51 is provided on the cup lid 5. The entire sample loading component is suspended from the support frame 2 by the hook 51 on the cup lid 5. The cup sleeve 6 is fitted over the outside of the sample cup 7 to protect the sample before and after testing, preventing external environmental influences.

[0028] Furthermore, the bottom end of the support frame 2 is mounted on the base 1, and stable support is achieved through the base 1.

[0029] Furthermore, a triangular support block 3 is provided on the support frame 2, and a lifting ring assembly is detachably connected to the tip of the support block 3, with the hook 51 connected to the lifting ring assembly.

[0030] Reference Figure 1 The lifting ring assembly can be a ring-shaped body, welded or otherwise mounted on the support block 3. However, this method makes the lifting ring assembly prone to shaking and its real-time disassembly capability weak.

[0031] like Figure 5 As shown, this utility model further designs the lifting ring assembly to ensure that it can be stably connected to the support block 3, while also being highly detachable.

[0032] like Figure 5 As shown, the lifting ring assembly includes an upper ring body 4 and a lower hook body 42. The upper ring body 4 and the lower hook body 42 are manufactured as a single unit. A positioning block 43 is provided at one end of the upper ring body 4. A stepped hole 31 is provided at the tip of the support block 3. The positioning block 43 is inserted into the stepped hole 31. This method facilitates the assembly and disassembly of the lifting ring assembly.

[0033] Furthermore, both the positioning block 43 and the stepped hole 31 are designed as regular polygons. In this way, the position of the positioning block 43 is fixed after it is inserted into the stepped hole 31, and the positioning block 43 cannot rotate, thereby achieving the fixation of the lifting ring assembly.

[0034] Furthermore, a first positioning hole 41 is provided on the inner wall at the junction of the upper ring body 4 and the lower hook body 42, and a second positioning hole 431 is provided inside the positioning block 43. The first positioning hole 41 and the second positioning hole 431 are directly opposite each other and located on the same horizontal axis. A threaded hole 32 communicating with the stepped hole 31 is provided on the support block 3. A support screw 9 is connected in the threaded hole 32. One end of the support screw 9 is located in the second positioning hole 431, and the other end passes through the first positioning hole 41. In this way, the two ends of the upper ring body 4 are connected by the support screw 9, which strengthens the overall support strength of the lifting ring assembly and avoids the limitation of the load-bearing capacity of the lifting ring assembly caused by relying solely on the insertion of the positioning block 43 and the stepped hole 31. Secondly, by using the threaded connection between the support screw 9 and the support block 3, the support block 3, the support screw 9 and the lifting ring assembly are connected as a whole, which strengthens the overall support strength. This structure is not only reliable and stable in connection, but also convenient to assemble and disassemble.

[0035] Furthermore, the support screw 9 is provided with two nuts 91, which are respectively attached to the two side walls of the upper ring body 4 and the lower hook body 42 to fix the support screw 9 to the upper ring body 4 and the lower hook body 42; the support screw 9 is provided with a second nut 92, which is attached to the end of the support block 3 to further achieve the locking effect between the support screw 9 and the support block 3.

[0036] In this invention, the sample cup 7 has an upper opening 72. The inner wall of the opening 72 is provided with an internal thread, and the outer wall of the opening 72 is provided with a thread. The inner wall of the opening 72 is threadedly connected to the outer wall of the cup lid 5, and the outer wall of the opening 72 is threadedly connected to the inner wall of the cup sleeve 6. The threaded connection facilitates the assembly and disassembly of the cup sleeve 6 and the cup lid 5.

[0037] In this utility model, the bottom end of the cup sleeve 6 is threadedly connected to the bottom cover 8, and the bottom end of the sample cup 7 is set tightly against the inner wall of the bottom cover 8.

[0038] This invention provides a device for measuring the moisture absorption rate of granular fertilizer. The combination of sample cup 7 and cup sleeve 6 facilitates protective transportation of the sample. This device can avoid the problem of the sample being affected by the outside air when it is placed in or taken out of the constant temperature and humidity chamber, which would cause the sample to change in weight and thus make it impossible to accurately measure the moisture absorption rate. This ensures that the test results are consistent with the actual moisture absorption and reduces measurement deviation.

[0039] Moisture absorption rate analysis and testing procedures:

[0040] First, open the threaded connection between sample cup 7 and cup sleeve 6, remove cup lid 5, accurately weigh 500g of 2-4mm granular fertilizer sample and place it into sample cup 7. Replace cup lid 5 and cup sleeve 6, and accurately weigh its mass as m1. Prepare the other two sample cups 7 in the same manner and weigh them accurately as well. Remove cup sleeve 6 from each sample cup 7, and place them sequentially on the lifting ring assembly of support block 3. Place the entire moisture absorption rate measuring device into a constant temperature and humidity chamber with adjusted temperature and humidity. After 24 hours, remove the corresponding cup sleeves, replace them with cup sleeves 6, and accurately weigh their mass on a balance as m2. Calculate the moisture absorption rate based on the change in mass.

[0041] Expression for moisture absorption rate:

[0042] w% - Moisture absorption rate, %;

[0043] m1 - Mass of the sample cup and cup sleeve before moisture absorption, g;

[0044] m2 - Mass of the cup and cup sleeve after moisture absorption + sample, in g;

[0045] 500 - Mass of the test sample, g.

[0046] The relationship between temperature, humidity and moisture absorption rate:

[0047] The higher the ambient temperature, the stronger the air's ability to evaporate moisture, and the lower the hygroscopicity and moisture absorption rate of the granular fertilizer. Conversely, the higher the ambient humidity, the weaker the air's ability to evaporate moisture, and the higher the hygroscopicity and moisture absorption rate of the granular fertilizer. The opposite is also true. For ease of quantitative evaluation and communication, this invention uses a temperature of 20℃ and a humidity of 65%.

[0048] Determining the through hole of the sample cup: The particle size of granular fertilizer is usually controlled at 2-4mm. In order to ensure that the granular fertilizer to be tested is in full contact with the air, it is calculated that the height of the sample cup is 150mm, the diameter is 100mm, and the diameter of the through hole is Φ1.5mm. The corresponding size of the sample cup can also be adjusted according to the bulk density of the material.

[0049] The base, support frame, sample cup, cup sleeve, etc. are made of galvanized material or stainless steel, and the material thickness should be 3-5mm.

[0050] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An apparatus for determining the moisture pick-up of a granular fertilizer, characterized by: The application relates to a sample loading device, which comprises a supporting frame and a plurality of sample loading assemblies arranged on the supporting frame, wherein the sample loading assemblies comprise a cup sleeve and a sample cup, the outer wall of the sample cup is uniformly provided with a plurality of through holes, an opening of the sample cup is provided with a cup cover, the cup cover is provided with a hook, and the outer side of the sample cup is sleeved with the cup sleeve.

2. The apparatus for determining the moisture absorption rate of a particulate fertilizer of claim 1, wherein: The bottom end of the supporting frame is arranged on a base.

3. The apparatus for determining the moisture absorption rate of a particulate fertilizer of claim 1, wherein: The supporting frame is provided with triangular supporting blocks, the tip of each supporting block is detachably connected with a lifting ring assembly, and the hook is connected with the lifting ring assembly.

4. The apparatus for determining the moisture absorption rate of a particulate fertilizer of claim 3, wherein: The lifting ring assembly comprises an upper ring body and a lower hook body, the upper ring body and the lower hook body are integrally manufactured, one end of the upper ring body is provided with a positioning block, the tip of the supporting block is provided with a stepped hole, and the positioning block is inserted into the stepped hole.

5. The apparatus for determining the moisture absorption rate of a particulate fertilizer of claim 4, wherein: The positioning block and the stepped hole are both arranged in a regular polygonal shape.

6. The apparatus for determining the moisture absorption rate of a particulate fertilizer of claim 4, wherein: The inner wall of the joint of the upper ring body and the lower hook body is provided with a first positioning hole, the inner portion of the positioning block is provided with a second positioning hole, the first positioning hole and the second positioning hole are opposite to each other, the supporting block is provided with a threaded hole which is in communication with the stepped hole, a supporting screw is connected in the threaded hole, one end of the supporting screw is arranged in the second positioning hole, and the other end of the supporting screw is arranged in the first positioning hole.

7. The apparatus for determining the moisture absorption rate of a particulate fertilizer of claim 6, wherein: Two nuts are arranged on the supporting screw, the two nuts are respectively arranged in close contact with the two side walls of the upper ring body and the lower hook body, and one nut is arranged on the supporting screw in close contact with the end of the supporting block.

8. The apparatus for determining the moisture absorption rate of a particulate fertilizer of claim 1, wherein: The upper portion of the sample cup is provided with a cup opening, the inner wall of the cup opening is provided with internal threads, the outer wall of the cup opening is provided with external threads, the inner wall of the cup opening is screw-connected with the outer wall of the cup cover, and the outer wall of the cup opening is screw-connected with the inner wall of the cup sleeve.

9. The apparatus for determining the moisture absorption rate of a particulate fertilizer of claim 1, wherein: The bottom end of the cup sleeve is screw-connected with a bottom cover.

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