Soil bulk density sampling device

Abstract

The utility model relates to the technical field of soil sampling, in particular to a soil bulk density sampling device, and solves the problems that in the prior art, a cutting ring and a large piece of soil are dug out together, and then soil outside the cutting ring is cut off by a soil cutter, so that a large amount of time is consumed, and the soil bulk density sampling device is easily damaged due to the viscidity of the soil. And in the process of cutting the soil outside the cutting ring, the soil inside the cutting ring is easily brought out, so that the sampling fails, and the soil needs to be collected again. A soil bulk density sampling device comprises a cylindrical soil sampler, an outer connecting rod is fixedly connected to the top of the cylindrical soil sampler, a supporting platform is installed on the upper portion of the inner side of the cylindrical soil sampler, and a cutting ring is installed on one side of the inner side of the cylindrical soil sampler. According to the soil sampler, cutting and shaping of a soil sample are facilitated, the soil sample is prevented from being compressed, the accuracy of volume weight is prevented from being influenced, and the soil sampler can be drilled into soil only by pressing the grip downwards with two hands when sampling is carried out in soft soil.

Description

Technical Field

[0001] The utility model relates to the technical field of soil sampling, in particular to a soil bulk density sampling device. Background Art

[0002] Soil bulk density refers to the oven-dry weight of soil per unit volume under its natural structure, expressed in grams per cubic centimeter. The size of soil bulk density is related to soil texture, structure, organic matter content, and soil compaction. The value of soil bulk density can be used to calculate the total porosity of the soil, the air content, and the weight of the soil in the arable layer at a certain depth per mu of land. The size of soil bulk density reflects the soil structure, air permeability, water permeability, and water retention capacity. The lower the soil bulk density, the better the soil structure, air permeability, and water permeability. The greater the soil bulk density, the lower the porosity, and the greater the degree of soil compaction. Understanding the compaction of the soil based on the soil bulk density is of great significance for scientifically regulating the soil environment, determining crop cultivation measures, and promoting high-yield and high-quality crops.

[0003] Methods for determining soil bulk density include the knife ring method, wax seal method, mercury displacement method, sand filling method, and gamma ray method. The wax seal method and mercury displacement method are primarily used to determine the bulk density of hard and brittle soils with irregular shapes, but they are inefficient and produce unstable test results. The mercury displacement method is rarely used because mercury vapor is harmful to human health. The sand filling method is complex and time-consuming, often used on rocky soils, and is generally not used for large-scale measurements. The gamma ray method requires special equipment and protective equipment, making it difficult to use widely. The knife ring method is currently the most commonly used measurement method, but it also presents many problems in actual use. First, the knife ring requires a handle and hammer to be used. During use, the knife ring and handle must be combined, and then the hammer must be used to press the knife ring into the soil multiple times, making the operation time-consuming and labor-intensive. Secondly, a shovel is needed to dig out the ring cutter pressed into the soil. In order to avoid damaging the ring cutter and the soil sample taken during the excavation process, the ring cutter is often dug out together with a large piece of soil, and then the soil outside the ring cutter is cut off little by little with a soil-cutting knife. This not only takes a lot of time, but also often due to the stickiness of the soil, the soil inside the ring cutter is easily brought out during the process of cutting the soil outside the ring cutter, resulting in sampling failure and the need for re-collection. Utility Model Content

[0004] The purpose of the utility model is to provide a soil bulk density sampling device, which solves the problem in the prior art that a ring knife is dug out together with a large piece of soil, and then the soil outside the ring knife is cut off little by little by a soil cutting knife. This not only consumes a lot of time, but also often due to the stickiness of the soil, the soil inside the ring knife is easily brought out during the process of cutting the soil outside the ring knife, resulting in sampling failure and the need for re-collection.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A soil bulk density sampling device includes a cylindrical soil sampler, the top of the cylindrical soil sampler is fixedly connected to an external connecting rod, a support platform is installed on the upper inner side of the cylindrical soil sampler, and a ring knife can be placed on the inner side of the cylindrical soil sampler, an inner connecting rod is provided on the inner side of the external connecting rod, the upper part of the external connecting rod is fixedly connected to an external rod handle, and the upper part of the internal connecting rod is fixedly connected to an internal rod handle, and the external rod handle and the inner rod handle are elastically connected, and the bottom end of the inner connecting rod is connected to the top end of the support platform by a thread.

[0007] Preferably, the inner wall of the cylindrical soil taker is smooth, which facilitates the up and down movement of the supporting platform and the removal of the ring knife.

[0008] Preferably, a spring is sleeved on the upper portion of the inner connecting rod, and the outer rod handle and the inner rod handle are elastically connected via the spring.

[0009] Preferably, a foot handle is fixedly connected to one side of the lower portion of the outer connecting rod.

[0010] Preferably, the outer rod handle is located at the top connected to the outer rod, and the inner rod handle is located at the top connected to the inner rod.

[0011] Preferably, the pedal handle is coated with anti-slip material, and an observation hole is opened on one side of the top of the support platform.

[0012] The utility model has at least the following beneficial effects:

[0013] The utility model relates to a soil bulk density sampling device. When the soil bulk density sampling device is in use, the support platform can be disassembled and removed at any time for cleaning to prevent soil adhesion and blockage from affecting the soil sampling effect. Air holes are left on the upper part, which can not only remove the air in the cylindrical soil sampler when taking soil, but also facilitate observation of the soil sample in the soil sampler. The diameter of the support platform is consistent with the ring knife, and it fits tightly with the inner wall of the cylindrical soil sampler. The whole is cylindrical and in the shape of a "concave". The concave space can make the soil sample in the ring knife slightly convex, which is convenient for cutting and shaping the soil sample and avoids compressing the soil sample to affect the accuracy of the bulk density. When sampling in the soil, you only need to press down the handle with both hands to drill the soil sampler into the soil. In harder soil, you can step on the foot pedal handle or easily exert force to drill the soil sampler into the soil. The cylindrical soil sampler is of appropriate size, and the inner wall can fit tightly with the ring knife without leaving a gap in the middle. The bottom end is sharpened and can be easily drilled into the soil for rapid soil sampling. The elasticity of the spring is used to lift the inner connecting rod and the support platform, making it convenient to place the ring knife into the cylindrical soil sampler each time sampling is completed. After the sampling is completed, you only need to gently press the inner rod handle to push the ring knife and soil sample out of the circular soil sampler through the support platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the overall main structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the top view of the structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the ring cutter structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the cylindrical earth-taking device of the present invention when viewed from above.

[0019] In the figure: 1. Cylindrical soil sampler; 2. Ring knife; 3. External connecting rod; 4. External rod handle; 5. Foot pedal handle; 6. Internal connecting rod; 7. Support platform; 8. Internal rod handle; 9. Spring; 10. Observation hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] Reference Figure 1-4 A soil bulk density sampling device includes a cylindrical soil sampler 1, an outer connecting rod 3 is fixedly connected to the top of the cylindrical soil sampler 1, a support platform 7 is installed on the upper inner side of the cylindrical soil sampler 1, and a ring knife 2 is placed inside the cylindrical soil sampler 1, an inner connecting rod 6 is provided on the inner side of the outer connecting rod 3, an outer rod handle 4 is fixedly connected to the upper part of the outer connecting rod 3, and an inner rod handle 8 is fixedly connected to the upper part of the inner connecting rod 6, and the outer rod handle 4 and the inner rod handle 8 are elastically connected, and the inner connecting rod 6 The bottom end is connected to the top of the support platform 7 by a threaded connection, and the support platform 7 can be unscrewed. The foot pedal handle 5 is coated with anti-slip material, and an observation hole 10 is provided on one side of the top of the support platform 7. Specifically, the diameter of the support platform 7 is consistent with the ring knife 2, and it fits tightly with the inner wall of the cylindrical soil sampler 1. The whole is cylindrical and in the shape of a "concave". The concave space can make the soil sample in the ring knife 2 slightly convex, which is convenient for cutting and shaping the soil sample, and avoids compressing the soil sample, thereby avoiding affecting the accuracy of the bulk density.

[0022] This program has the following working process:

[0023] In harder soil, you can step on the foot pedal handle 5, or you can easily exert force to drill the soil sampler into the soil. The cylindrical soil sampler 1 is of appropriate size, and the inner wall can fit tightly with the ring knife 2 without leaving a gap in the middle. The bottom end is sharpened and can easily drill into the soil to achieve rapid soil extraction. The elasticity of the spring 9 is used to lift the inner connecting rod 6 and the support platform 7, making it convenient to place the ring knife 2 into the cylindrical soil sampler 1 each time sampling is performed. After the sampling is completed, you only need to gently press the inner rod handle 8 to push the ring knife 2 and the soil sample out of the circular soil sampler through the support platform 7.

[0024] According to the above working process, we can know that:

[0025] The diameter of the support platform 7 is consistent with that of the ring knife 2, and it fits tightly with the inner wall of the cylindrical soil sampler 1. The overall shape is cylindrical and "concave". The concave space can make the soil sample in the ring knife 2 slightly convex, which is convenient for cutting and shaping the soil sample, and avoids compressing the soil sample, so as to avoid affecting the accuracy of the bulk density.

[0026] Furthermore, the inner wall of the cylindrical soil extractor 1 is smooth, which facilitates the up and down movement of the supporting platform 7 and the removal of the ring knife 2.

[0027] Furthermore, a spring 9 is provided on the upper part of the inner connecting rod 6, and the outer rod handle 4 and the inner rod handle 8 are elastically connected by the spring 9. Specifically, the elasticity of the spring 9 is used to lift the inner connecting rod 6 and the support platform 7, so that the ring knife 2 can be placed in the cylindrical soil sampler 1 each time sampling is performed.

[0028] Furthermore, a pedal handle 5 is fixedly connected to one side of the lower portion of the outer connecting rod 3. Specifically, the pedal handle 5 is used to facilitate operation of the soil extractor.

[0029] Furthermore, the outer rod handle 4 is located at the top of the outer connecting rod 3 , and the inner rod handle 8 is located at the top of the inner connecting rod 6 .

[0030] To sum up: the support platform 7 and the ring knife 2 are both non-slip connected to the inner wall of the cylindrical soil sampler 1 through threads to enhance the stability of the support platform 7 and the ring knife 2. The elasticity of the spring 9 is used to lift the inner connecting rod 6 and the support platform 7, making it convenient to place the ring knife 2 into the cylindrical soil sampler 1 each time sampling is taken.

[0031] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A soil bulk density sampling device, comprising a cylindrical soil sampler (1), characterized in that: The top of the cylindrical earth picker (1) is fixedly connected to an outer connecting rod (3), the upper inner portion of the cylindrical earth picker (1) is provided with a support platform (7), and a ring knife (2) is provided on one inner side of the cylindrical earth picker (1), an inner connecting rod (6) is provided on the inner side of the outer connecting rod (3), the upper portion of the outer connecting rod (3) is fixedly connected to an outer rod handle (4), and the upper portion of the inner connecting rod (6) is fixedly connected to an inner rod handle (8), and the outer rod handle (4) and the inner rod handle (8) are elastically connected, and the bottom end of the inner connecting rod (6) is connected to the top end of the support platform (7) by a thread, so that the support platform (7) can be unscrewed.

2. A soil bulk density sampling device according to claim 1, characterized in that: The inner wall of the cylindrical soil taker (1) is smooth, which facilitates the up and down movement of the support platform (7) and the removal of the ring knife (2).

3. A soil bulk density sampling device according to claim 2, characterized in that: The upper part of the inner connecting rod (6) is sleeved with a spring (9), and the outer rod handle (4) and the inner rod handle (8) are elastically connected via the spring (9).

4. A soil bulk density sampling device according to claim 1, characterized in that: A pedal handle (5) is fixedly connected to one side of the lower portion of the outer connecting rod (3).

5. A soil bulk density sampling device according to claim 1, characterized in that: The outer rod handle (4) is located at the top of the outer connecting rod (3), and the inner rod handle (8) is located at the top of the inner connecting rod (6).

6. A soil bulk density sampling device according to claim 4, characterized in that: The pedal handle (5) is coated with anti-skid material, and an observation hole (10) is opened on one side of the top of the support platform (7).

Images