A device for unloading a ring knife sample in a laboratory sampling cylinder

Abstract

The utility model relates to a kind of unloading and taking device of ring cutter sample in sampling cylinder for laboratory, including support frame, fastening mechanism and transmission mechanism.Support frame provides stable basis and support for the whole unloading and taking process.Fastening mechanism is used to clamp and fix sampling cylinder.Transmission mechanism provides driving force for unloading and taking operation and is responsible for converting power into ejecting force.Compared with prior art, the unloading and taking device of ring cutter sample in sampling cylinder for laboratory provided by the utility model can flexibly switch power source according to sample resistance, takes into account the convenience of conventional operation and the adaptability of high resistance working condition, and single-person operation is more free, significantly improves the flexibility and operation efficiency of the device.At the same time, power is transmitted to rack through large gear and pinion, which amplifies the thrust and makes it easier to eject the ring cutter sample;At the same time, the rack moves at a speed slower than the speed of manual operation, which slows down the speed and meets the requirement of stable ejection of the sample.

Description

Technical Field

[0001] This utility model belongs to the field of sampling cylinder technology, and more specifically, it relates to a device for unloading ring knife samples in a laboratory sampling cylinder. Background Technology

[0002] A ring sample is a cylindrical, undisturbed soil column vertically and undisturbed cut from the soil mass using a specially designed, standard-sized thin-walled ring sampler. It is a crucial sample source for fundamental geotechnical tests, determining the natural density and moisture content of soil. Its quality and representativeness directly impact the accuracy of engineering surveys and designs. The key to successful operation lies in maintaining the original shape of the soil sample and precisely controlling its volume; it is best suited for fine-grained soils (clay, silt) and slightly denser sandy soils.

[0003] Currently, the devices used in laboratories to remove samples from the ring cutter inside the sampling tube are all simple, self-made temporary equipment. There are two main types: First, manual pushing of the ring cutter placed inside the sampling tube is used for sample removal, with moderate tapping of the tube wall to generate vibration and assist in sample removal when resistance is encountered; second, a self-made support frame is used to fix the sampling tube, and a hydraulic jack installed at the bottom of the frame continuously applies force to push the ring cutter inside the tube to complete sample removal.

[0004] However, both of the above methods have many drawbacks. For example, when unloading samples by manually pushing and gently tapping: the efficiency is low and the labor intensity is high, relying on manual operation is time-consuming and laborious; uneven force can easily cause the ring cutter to fall off, affecting the continuity of operation and sample safety; tapping can easily cause secondary disturbances, damaging the original structure and physical properties of the sample; the controllability of operation is poor and there are safety risks, as the precision of manual control is limited, and the tapping process may cause sample disintegration, ring cutter displacement, or accidental injury to personnel. In addition, for unloading samples by pushing with hydraulic jacks: the reset efficiency is low and the operation is cumbersome: after the jack reaches the end of its stroke, the depressurization and reset process is time-consuming and laborious; when the piston cannot be pressed down, it needs to be moved out and adjusted, further increasing the operational burden; there are safety hazards in equipment handling: repeated movement of the jack can easily cause the equipment to be bumped and damaged, and there is a risk of operators being injured by falling or being pinched; equipment movement can cause damage to the original sample: repeated movement of the equipment can lead to misalignment of the positioning, and the applied thrust may not be aligned with the central axis of the sample, causing deformation of the original sample. Insufficient effective stroke requires additional assistance: The typical lifting stroke (10-20cm) of a small hydraulic jack is often less than the length of a standard sampling cylinder, requiring the use of tools such as pads for segmented operation, which reduces efficiency and introduces errors; in addition, hydraulic jacks are prone to hydraulic oil leakage due to long-term use or improper maintenance, affecting equipment performance and environmental cleanliness.

[0005] In view of this, this utility model is hereby proposed. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a device for unloading ring cutter samples from a laboratory sampling cylinder, thereby resolving the issues existing in the prior art.

[0007] This utility model discloses a device for unloading ring cutter samples from a laboratory sampling cylinder, which is achieved through the following specific technical means:

[0008] A device for unloading ring cutter samples from a laboratory sampling tube includes a support frame, a fastening mechanism, and a transmission mechanism.

[0009] The support frame includes a top plate, a bottom plate, and side plates, with the top plate connected to the bottom plate via the side plates;

[0010] The fastening mechanism includes two sets of semi-circular clamping plates, a lead screw, a lead screw support plate, and a handwheel. The lead screw passes through the lead screw support plate, one end of the lead screw is connected to the semi-circular clamping plate, and the other end is connected to the handwheel. The lead screw support plate is fixed to the top plate.

[0011] The transmission mechanism includes a top cap, a rack, a first rotating shaft, and a second rotating shaft. The top cap is disposed on the top of the rack and is located below the clamping space formed by the two sets of semi-circular clamping plates. A first gear and a second gear are disposed on the first rotating shaft, and the first gear meshes with the rack. A third gear is disposed on the second rotating shaft, and the second gear meshes with the third gear.

[0012] Preferably, the transmission mechanism further includes a third rotating shaft, on which a fourth gear is disposed, the fourth gear meshing with the third gear, and a ratchet assembly is disposed at the end of the third rotating shaft, the ratchet assembly including a ratchet, a pawl and a lever, the ratchet and the lever being connected to the end of the third rotating shaft, the pawl contacting the ratchet teeth of the ratchet to control the rotation direction of the ratchet assembly.

[0013] Preferably, the pawl is connected to a lifting device, which can lift the pawl away from the ratchet teeth.

[0014] Preferably, a rocking rod is provided at the end of the second rotating shaft.

[0015] Preferably, the rocker arm and the ratchet assembly are located on the outside of the side plate.

[0016] Preferably, the radius of the first gear is smaller than the radius of the second gear.

[0017] Preferably, the top cap and the rack are connected in a detachable manner.

[0018] Compared with existing technologies, the present invention provides a device for unloading ring cutter samples from a laboratory sampling cylinder. This device allows for flexible switching of the power source based on sample resistance, balancing ease of routine operation with adaptability to high-resistance conditions. It also provides greater freedom for single-person operation, significantly improving the device's flexibility and operational efficiency. Simultaneously, power is transmitted to the rack via a large gear and a small gear, amplifying the thrust and making it easier to eject the ring cutter sample. Furthermore, the rack's movement speed is lower than that of a human hand, providing a deceleration effect and meeting the requirement for stable sample ejection.

[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a sampling device for removing ring cutter samples from a laboratory sampling tube, provided in an embodiment of this utility model.

[0021] Figure 2 This is a front view of a sample removal device for a ring cutter in a laboratory sampling tube provided in this embodiment of the present invention.

[0022] Figure 3 This is a right view of a sample removal device for a ring cutter in a laboratory sampling tube provided in this embodiment of the present invention.

[0023] Figure 4 This is a top view of a sampling device for removing ring cutter samples from a laboratory sampling cylinder, provided in an embodiment of this utility model.

[0024] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0025] 1. Top plate; 2. Side plate; 3. Bottom plate; 4. Semi-circular clamping plate; 5. Lead screw; 6. Lead screw support plate; 7. Handwheel; 8. Top cap; 9. Rack; 10. First rotating shaft; 11. Second rotating shaft; 12. Third rotating shaft; 13. First gear; 14. Second gear; 15. Third gear; 16. Fourth gear; 17. Rocking lever; 18. Ratchet assembly; 19. Ratchet; 20. Pad; 21. Lever. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations. 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 present 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.

[0027] like Figure 1-4 As shown in the figure, the present invention provides a device for unloading ring cutter samples from a laboratory sampling tube, comprising a support frame, a fastening mechanism and a transmission mechanism.

[0028] The support frame includes a top plate 1, a bottom plate 3, and side plates 2, wherein the top plate 1 is connected to the bottom plate 3 via the side plates 2;

[0029] The fastening mechanism includes two sets of semi-circular clamping plates 4, a lead screw 5, a lead screw 5 support plate, and a handwheel 7. The lead screw 5 passes through the lead screw 5 support plate, one end of the lead screw 5 is connected to the semi-circular clamping plate 4, and the other end is connected to the handwheel 7. The lead screw 5 support plate is fixed to the top plate 1.

[0030] The transmission mechanism includes a top cap 8, a rack 9, a first rotating shaft 10, and a second rotating shaft 11. The top cap 8 is located on top of the rack 9 and below the clamping space formed by the two sets of semi-circular clamping plates 4. A first gear 13 and a second gear 14 are mounted on the first rotating shaft 10, and the first gear 13 meshes with the rack 9. A third gear 15 is mounted on the second rotating shaft 11, and the second gear 14 meshes with the third gear 15. The transmission mechanism also includes a third rotating shaft 12, on which a fourth gear 16 is mounted, and the fourth gear 16 meshes with the third gear 15. A ratchet set 19 18 is located at the end of the third rotating shaft 12. The ratchet set 19 18 includes a ratchet 19, a pawl 20, and a lever 21. The ratchet 19 and the lever 21 are both connected to the end of the third rotating shaft 12. The pawl 20 contacts the ratchet teeth of the ratchet 19 to control the rotation direction of the ratchet set 19 18. The pawl 20 is connected to a lifting device, which can lift the pawl 20 away from the ratchet. A rocking rod 17 is provided at the end of the second rotating shaft 11. The rocking rod 17 and the ratchet 19 group 18 are located on the outside of the side plate 2. The radius of the first gear 13 is smaller than the radius of the second gear 14. The top cap 8 and the rack 9 are detachably connected.

[0031] In this utility model, the device mainly includes the following components:

[0032] Support frame: Consists of the main frame of the device, providing a stable foundation and support for the entire unloading process. The support frame consists of a top plate 1, a bottom plate 3, and [other components].

[0033] Fastening part: Integrated into the top of the support frame, used to clamp and fix the sampling cylinder. This part consists of a semi-circular pipe clamp, lead screw 5, lead screw 5 support plate and handwheel 7.

[0034] Power unit: Located on the outside of the support frame side plate 2, it provides driving force for unloading operations. It includes two power input methods: rocker arm 17 drive, and a compound drive consisting of lever 21 mechanism and ratchet 19 mechanism.

[0035] Force transmission section: Located inside the support frame, it is responsible for converting power into ejection force. Its core components include four meshing gears, a rotating shaft, a rack 9, and a cap 8 mounted on the top of the rack 9. Power is transmitted to the rack 9 through the gear set and the rotating shaft, driving the rack 9 and its cap 8 to move up and down in a linear motion, thereby ejecting and unloading the ring cutter sample from the sampling cylinder.

[0036] The operation method of the unloading device of this utility model:

[0037] Step 1: Fix the sampling tube.

[0038] Place the sample tube from Kaifeng in the center of the semi-circular tube clamp.

[0039] Turn the handwheel 7 clockwise to drive the lead screw 5 to tighten the tube clamp and firmly hold the sampling tube.

[0040] Step 2: Extract the ring cutter sample.

[0041] Adjust the device to ensure that the top cap 8 is aligned with the bottom of the ring sample inside the sampling tube.

[0042] Rotate the rocker arm 17 clockwise at a constant speed. The power drives the rack 9 and the top cap 8 to rise slowly through the transmission system, and smoothly push the ring cutter sample out of the sampling cylinder.

[0043] When the rocker lever 17 stops turning, the anti-return pawl 20 in the ratchet 19 group 18 automatically engages with the ratchet 19 tooth groove, locking the mechanism and preventing the rack 9 and top cap 8 from falling back unexpectedly.

[0044] Use a scraper or flat knife to remove the ejected ring cutter sample.

[0045] Effort-saving operation option: If the pushing resistance is high, lever 21 can be used instead of rocker 17 to provide power, making operation easier. Lever 21 also drives the ratchet 19-gear-rack 9 system.

[0046] Step 3: Reset the device.

[0047] It has been confirmed that all the samples from the ring cutter inside the sampling cylinder have been collected.

[0048] With your left hand, pull up the anti-return pawl 20 to release the lock on the ratchet 19, and with your right hand, turn the rocker lever 17 counterclockwise.

[0049] The rack 9 drives the top cap 8 to descend until it is completely separated from the sampling cylinder.

[0050] Turn handwheel 7 counterclockwise to loosen the semi-circular tube clamp and remove the empty sampling tube.

[0051] This completes the process of unloading the ring cutter sample from a single sampling cylinder.

[0052] Loop operation:

[0053] By repeating step one to fix the new sampling cylinder, step two to extract the sample, and step three to reset the device, the unloading of ring cutter samples from multiple sampling cylinders can be completed continuously and efficiently.

[0054] Compared with the prior art, the present invention has the following advantages:

[0055] ① The dual power source collaborative design (rocker 17 + lever 21 ratchet 19 group 18) allows for flexible switching of the power source according to the sample resistance, taking into account both the convenience of conventional operation and the adaptability to high resistance conditions. It also allows for greater freedom of single-person operation and significantly improves the flexibility and efficiency of the device.

[0056] ② Gear 3 and gear 4 rotate coaxially, and gear 3 (large gear) drives gear 4 (small gear). The power is transmitted to rack 9 through the large gear and small gear, which amplifies the thrust and makes it easier to eject the ring cutter sample. At the same time, the moving speed of rack 9 is less than the operating speed of human hand, which has a deceleration effect and meets the requirement of smooth ejection of the sample.

[0057] ③ The device reset operation is simple and efficient. Simply lift the anti-return pawl 20 and turn the rocker lever 17 counterclockwise to drive the system reset. The operation is easy and effortless, and the reset process is quick and smooth.

[0058] ④ The top cap 8 and the rack 9 are connected by a threaded pair, which can be quickly disassembled and assembled by screwing. A series of top cap 8 components are provided to accurately adapt to different specifications of ring cutters.

[0059] ⑤ Drive the lead screw 5 to tighten the semi-circular tube clamp, achieving stepless compatibility of Φ80-Φ110mm standard sampling tubes, with an adjustable stroke ≥30mm.

[0060] This device fundamentally solves the problem of difficult sample removal from the sampling tube using the ring cutter, and has three core advantages:

[0061] 1) Advantages of ergonomics: high efficiency and safety

[0062] ① Dual-power coordinated operation

[0063] Joystick 17 in normal mode: quick operation under light load, improving efficiency by more than 30%.

[0064] Lever 21, ratchet 19, labor-saving mode: thrust is amplified 5-8 times in high-resistance conditions, breaking through the limitations of traditional single drive.

[0065] ②Intrinsically safe design

[0066] Ratchet 19 self-locking (check pawl 20): prevents falling back in real time during the lifting process, avoiding the risk of ring cutter sample collapse.

[0067] Rigid fixing with pipe clamps: eliminates off-center load accidents caused by sampling cylinder misalignment.

[0068] 2) Advantages of the transmission system: precise force control and smoothness

[0069] ① Gear power amplification system: The large coaxial wheel drives the small wheel, doubling the output thrust and reducing the operating force by 40-60%.

[0070] ② Motion control: The linear speed of rack 9 is slowed down, the lifting speed is stabilized, and the secondary disturbance of the sample is reduced.

[0071] 3) Advantages of the operation process: extremely simple reset and continuity

[0072] ①One-button reset system

[0073] The pawl 20 lever lifts and the joystick reverses in a linked design, with a reset time of less than 5 seconds.

[0074] The top cap 8 automatically aligns and disengages, requiring zero manual adjustment.

[0075] ② Modular quick-change

[0076] The pipe clamp is compatible with Φ80-Φ110 standard sampling cylinders, and the conversion time is less than 15 seconds.

[0077] The interval between cyclical operations has been reduced to half of the original manual labor.

[0078] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0079] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0080] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0081] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need further definition and explanation in subsequent figures.

Claims

1. A device for removing a ring sample from a laboratory sampling tube, characterized in that, Includes support frame, fastening mechanism and transmission mechanism; The support frame includes a top plate, a bottom plate, and side plates, with the top plate connected to the bottom plate via the side plates; The fastening mechanism includes two sets of semi-circular clamping plates, a lead screw, a lead screw support plate, and a handwheel. The lead screw passes through the lead screw support plate, one end of the lead screw is connected to the semi-circular clamping plate, and the other end is connected to the handwheel. The lead screw support plate is fixed to the top plate. The transmission mechanism includes a top cap, a rack, a first rotating shaft, and a second rotating shaft. The top cap is disposed on the top of the rack and is located below the clamping space formed by the two sets of semi-circular clamping plates. A first gear and a second gear are disposed on the first rotating shaft, and the first gear meshes with the rack. A third gear is disposed on the second rotating shaft, and the second gear meshes with the third gear.

2. The device for unloading a ring cutter sample from a laboratory sampling tube according to claim 1, characterized in that, The transmission mechanism further includes a third rotating shaft, on which a fourth gear is mounted. The fourth gear meshes with the third gear. A ratchet assembly is provided at the end of the third rotating shaft. The ratchet assembly includes a ratchet, a pawl, and a lever. The ratchet and the lever are both connected to the end of the third rotating shaft. The pawl contacts the ratchet teeth of the ratchet to control the rotation direction of the ratchet assembly.

3. The device for unloading a ring cutter sample from a laboratory sampling tube according to claim 2, characterized in that, The pawl is connected to a lifting device, which can lift the pawl away from the ratchet teeth.

4. The device for unloading a ring cutter sample from a laboratory sampling tube according to claim 3, characterized in that, A rocking rod is provided at the end of the second rotating shaft.

5. The device for unloading a ring cutter sample from a laboratory sampling tube according to claim 4, characterized in that, The rocker arm and the ratchet assembly are located on the outside of the side plate.

6. The device for unloading a ring cutter sample from a laboratory sampling tube according to claim 5, characterized in that, The radius of the first gear is smaller than the radius of the second gear.

7. The device for unloading a ring cutter sample from a laboratory sampling tube according to claim 6, characterized in that, The top cap and the rack are connected in a detachable manner.

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