A novel stirring rod for soil mechanical composition determination
By designing an adjustable-length stirring rod assembly, the problems of rubber head wear and length fixation were solved, enabling the stirring rod to adapt to different depths and experiments, thus improving the accuracy and practicality of the measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU VOCATIONAL COLLEGE OF SCI & TECH
- Filing Date
- 2025-04-01
- Publication Date
- 2026-06-26
AI Technical Summary
Existing glass stirring rods have rubber tips that wear out easily during use, leading to inaccurate measurements. Furthermore, their fixed length makes them unsuitable for different depths and experimental requirements.
Design a stirring rod assembly including an outer tube, a rod body, and a retaining spring. The length of the stirring rod can be adjusted by the elastic deformation of the retaining spring and the retaining block structure. Combined with the ball head and convex head structure, it can meet different experimental requirements.
The length of the stirring rod is adjustable to adapt to different depths and experimental needs, thus improving the accuracy and practicality of the measurement.
Smart Images
Figure CN224404579U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stirring rod structure technology, specifically to a novel stirring rod for determining the mechanical composition of soil. Background Technology
[0002] Soil testing systematically analyzes soil composition, structure, and function using physical, chemical, and biological methods. Its core objectives include determining key indicators such as soil nutrient content (e.g., nitrogen, phosphorus, potassium), pH value, organic matter ratio, heavy metal concentration, and microbial activity. In experimental procedures, rubber-tipped glass stirrers are widely used for stirring and extraction in various sample pretreatment processes. For example, in soil cation exchange capacity experiments, the traditional method involves manually stirring soil samples containing extractants using a rubber-tipped glass stirrer to allow cations adsorbed on the soil surface to exchange into the extract.
[0003] However, when using existing glass rods, the contact gap between the rubber head structure and the glass rod is prone to wear and cracking over time, often leaving some soil behind, which can lead to inaccurate measurements. In addition, the length of the glass rod is a fixed value, so it cannot be used for stirring work at different depths and in different experiments, and cannot meet the needs of different sized glass rods for different parameters in the laboratory. Utility Model Content
[0004] Technical problems to be solved
[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a novel stirring rod for determining the mechanical composition of soil, which can effectively solve the problems in the existing technology.
[0006] Technical solution
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] This utility model provides a novel stirring rod for determining the mechanical composition of soil, including a washing and screening assembly and a stirring rod assembly. The stirring rod assembly includes an outer tube, a rod body disposed inside the outer tube, and a retaining spring disposed inside the rod body. Both the outer tube and the rod body have through slots on one side to form a connecting hole and a positioning hole. The retaining spring is inclinedly disposed inside the rod body, and a retaining block is fixed to the outer side of the bottom end of the retaining spring. The retaining block is disposed in the connecting hole and the positioning hole. A protrusion is fixed to the bottom end of the outer tube, and a ball head is fixed to the top end of the rod body.
[0009] Furthermore, multiple sets of connection holes are equidistantly formed on the side wall of the outer tube.
[0010] Furthermore, the top end of the retaining spring is fixed to the inner wall of the rod, and the retaining spring is made of a shaped material with elastic potential energy.
[0011] Furthermore, the protrusion is a frustum-shaped structure that is smaller at the top and larger at the bottom, and multiple sets of columnar structures are fixed in an array at the bottom of the protrusion, with their bottom ends protruding from the bottom of the protrusion.
[0012] Furthermore, a set of positioning holes is provided, and the outer side of the card block has a rounded corner structure and protrudes beyond the outer side of the connecting hole.
[0013] Furthermore, the radius of the ball head is greater than the outer diameter of the outer tube.
[0014] Beneficial effects
[0015] The technical solution provided by this utility model has the following advantages compared with the known public technology:
[0016] This invention utilizes a combination structure of a rod, an outer tube, and a retaining spring. When operating the stirring rod, the user can press inward using the retaining block structure on the outside of the retaining spring. The retaining spring bends and deforms, and the retaining block structure retracts into the positioning hole. At this time, the user can use the external ball head structure to move the internal rod within the outer tube, pull the rod out of the outer tube, and adjust the length of the stirring rod. Once the specified length is reached, the retaining spring deforms, causing the retaining block to pop out and engage in the designated connection hole on the outer tube. This achieves a combined fixation of the retaining block, connection hole, and positioning hole. Compared to existing structures, this device has the function of adjusting according to the depth of different tools, meeting the needs of on-site operation.
[0017] In this device, the bottom end of the outer tube is fixed with a protruding head structure with multiple sets of columnar structures, which facilitates the mixing and determination of soil mechanical composition experiments. The ball head structure fixed on the outside of the rod can be used for soil cation mixing and testing experiments, meeting the needs of different experiments and expanding the practicality of this device. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a structural schematic diagram of the washing and screen assembly and the stirring plate assembly;
[0020] Figure 2 This is a structural exploded view of the washing and screen assembly and the stirring plate assembly.
[0021] Figure 3 This is an exploded view of the structure of this utility model.
[0022] The labels in the diagram represent: 1. Washing and screening assembly; 2. Stirring rod assembly; 21. Outer tube; 211. Protrusion; 212. Connecting hole; 22. Rod body; 221. Positioning hole; 23. Snap ring; 231. Snap block; 24. Ball head. Detailed Implementation
[0023] 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 only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0024] The present invention will be further described below with reference to the embodiments.
[0025] Example: A novel stirring rod for determining the mechanical composition of soil, see attached figure. Figure 1 - Appendix Figure 3 The system includes a washing and screening assembly 1 and a stirring rod assembly 2. The stirring rod assembly 2 includes an outer tube 21, a rod body 22 disposed inside the outer tube 21, and a retaining spring 23 disposed inside the rod body 22. The outer tube 21 and the rod body 22 are both provided with through slots on one side to form a connecting hole 212 and a positioning hole 221. The retaining spring 23 is inclinedly disposed inside the rod body 22, and a retaining block 231 is fixed to the outer side of the bottom end of the retaining spring 23. The retaining block 231 is disposed in the connecting hole 212 and the positioning hole 221. A protrusion 211 is fixed to the bottom end of the outer tube 21, and a ball head 24 is fixed to the top end of the rod body 22.
[0026] Multiple sets of connection holes 212 are equidistantly opened on the side wall of the outer tube 21. In this device, the bottom end of the outer tube 21 is fixed with multiple sets of columnar structures, which facilitates the mixing and testing experiments of soil mechanical composition. The ball head 24 structure fixed on the outside of the rod 22 can be used for the mixing and testing experiments of soil cations, meeting the needs of different experiments and expanding the practicality of this device.
[0027] The top of the retaining spring 23 is fixed to the inner wall of the rod body 22, and the retaining spring 23 is made of a plastic material with elastic potential energy; the protrusion 211 is a frustum-shaped cone with a smaller top and a larger bottom, and multiple sets of columnar structures are fixed in an array at the bottom of the protrusion 211, with their bottom ends protruding beyond the bottom end of the protrusion 211; a set of positioning holes 221 is provided, and the outer side of the locking block 231 is a rounded corner structure, protruding beyond the outer side of the connecting hole 212; the radius of the ball head 24 is larger than the outer diameter of the outer tube 21; through the combined structure of the rod body 22-outer tube 21-retaining spring 23, when the user operates this stirring rod, the user can use the retaining spring 23 to lock the ball head. When block 231 is pressed inward, the retaining spring 23 bends and deforms, and block 231 retracts into the positioning hole 221. At this time, the user can move the internal rod 22 in the outer tube 21 through the external ball head 24 structure, pull out the rod 22 in the outer tube 21, and adjust the length of the stirring rod. After reaching the specified length, the retaining spring 23 deforms, and block 231 pops outward and locks into the specified connection hole 212 on the outer tube 21, thereby realizing the combination and fixation of block 231-connection hole 212-positioning hole 221. Compared with the existing structure, this device has the function of adjusting according to the depth of different utensils, meeting the needs of on-site operation.
[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.
Claims
1. A novel stirring rod for determining the mechanical composition of soil, characterized in that, The assembly includes a washing and screening component (1) and a stirring rod component (2). The stirring rod component (2) includes an outer tube (21), a rod body (22) disposed inside the outer tube (21), and a retaining ring (23) disposed inside the rod body (22). The outer tube (21) and the rod body (22) are both provided with through slots on one side to form a connecting hole (212) and a positioning hole (221). The retaining ring (23) is inclinedly disposed inside the rod body (22), and a retaining block (231) is fixed on the outer side of the bottom end of the retaining ring (23). The retaining block (231) is disposed in the connecting hole (212) and the positioning hole (221). A protrusion (211) is fixed on the bottom end of the outer tube (21), and a ball head (24) is fixed on the top end of the rod body (22).
2. A novel stirring rod for determining the mechanical composition of soil according to claim 1, characterized in that, Multiple sets of connection holes (212) are equidistantly provided on the side wall of the outer tube (21).
3. A novel stirring rod for determining the mechanical composition of soil according to claim 1, characterized in that, The top of the snap ring (23) is fixed to the inner wall of the rod (22), and the snap ring (23) is made of a plastic material with elastic potential energy.
4. A novel stirring rod for determining the mechanical composition of soil according to claim 1, characterized in that, The protrusion (211) is a frustum-shaped structure with a smaller top and a larger bottom, and multiple sets of columnar structures are fixed in an array at the bottom of the protrusion (211), with their bottom ends protruding from the bottom end of the protrusion (211).
5. A novel stirring rod for determining the mechanical composition of soil according to claim 4, characterized in that, The positioning hole (221) is provided in a set, and the outer side of the card block (231) is a rounded corner structure and protrudes from the outer side of the connecting hole (212).
6. A novel stirring rod for determining the mechanical composition of soil according to claim 1, characterized in that, The radius of the ball head (24) is greater than the outer diameter of the outer tube (21).