Disposable soil powder sample sampling device

Abstract

The invention relates to the field of soil detection experiment equipment, in particular to a disposable soil powder sample sampling device which comprises a spoon handle and a sampling spoon head, a clamping mechanism used for clamping the sampling spoon head is additionally arranged in the spoon handle, the spoon handle and the sampling spoon head are connected into a whole through the clamping mechanism, and the sampling spoon head is connected with the spoon handle through the clamping mechanism. A button is additionally arranged at the position, close to the tail end, of the spoon handle and used for releasing the sampling spoon head. The clamping mechanism comprises two first clamping rods, a driving part is installed in the spoon handle in the length direction of the spoon handle, the two first clamping rods are installed on the driving part in a hinged mode and distributed on the left side and the right side of the driving part, one end of each first clamping rod is connected with the driving part in a hinged mode, and the other end of each first clamping rod is connected with the spoon handle in a hinged mode. The other ends of the first clamping rods extend out of the spoon handle and abut against the sampling spoon head, and the two first clamping rods are clamped on the left side and the right side of the sampling spoon head. The purpose of the invention is to reduce the operating cost of a laboratory.

Description

Technical Field

[0001] The present application relates to the field of soil testing experimental equipment, and in particular to a disposable soil powder sample sampling device. Background Art

[0002] In soil testing experiments, accurate sampling and weighing are key to ensuring the reliability of test results. Currently, the sampling and weighing tools commonly used in laboratories are mainly divided into two categories: one is disposable plastic weighing spoons, and the other is reusable plastic or glass weighing spoons.

[0003] In the related art, disposable plastic weighing spoons are usually made of polymer materials such as polypropylene (PP), which are low-cost and easy to use. Experimenters can use this type of weighing spoon to scoop soil powder directly from the sample container and discard it after weighing. The operating process is: sampling → weighing → discarding, without the need for a cleaning step, which avoids cross-contamination between different samples to a certain extent; reusable metal (plastic) or glass weighing spoons rely on the post-experimental cleaning process to achieve reuse. When in use, experimenters need to strictly clean (such as soaking in dilute nitric acid, ultrasonic cleaning, etc.) and dry it after each sampling to remove residual soil powder and possible attached heavy metal ions to ensure the purity of the next sampling.

[0004] While disposable plastic weighing spoons avoid cross-contamination, the plastic waste generated after extensive use is difficult to degrade, which is inconsistent with current green chemistry and environmental protection concepts and increases laboratory waste disposal costs. Furthermore, some low-quality disposable weighing spoons may have insufficient material stability. When exposed to acidic or alkaline soil samples, they may release contaminants, potentially interfering with test results.

[0005] Although reusable weighing spoons reduce material waste, their cleaning and disinfection process is cumbersome and time-consuming. If they are not cleaned thoroughly, cross-contamination between different samples can easily occur, thereby affecting the accuracy of soil heavy metal and organic matter determination. Metal weighing spoons may chemically react with certain components in the soil (such as stainless steel spoons may rust in a humid environment), introducing additional metal ion contamination. Glass weighing spoons are fragile and inconvenient to carry. Summary of the Invention

[0006] This application provides a disposable soil powder sample collection device designed to significantly reduce environmental pollution while meeting the need for single-use, in line with green chemistry and environmental protection concepts. Furthermore, compared to the wastewater pollution that may be generated during the cleaning and disinfection process of reusable weighing spoons, this device is discarded as a whole after use, eliminating the need for a complex cleaning process, further reducing the environmental burden. At the same time, it reduces the consumption of resources such as chemical reagents, water and electricity required for cleaning and disinfection, as well as the high processing costs incurred by the large amount of non-degradable plastics during waste disposal, thereby comprehensively reducing laboratory operating costs.

[0007] This application provides a disposable soil powder sample sampling device, which adopts the following technical solutions:

[0008] A disposable soil powder sample sampling device includes a spoon handle and a sampling spoon head, wherein a clamping mechanism for clamping the sampling spoon head is added inside the spoon handle, and the spoon handle and the sampling spoon head are connected as a whole through the clamping mechanism. A button is added near the tail end of the spoon handle, and the button is used to release the sampling spoon head; the clamping mechanism includes two first clamping rods, and a driving member is installed inside the spoon handle along its length direction. The two first clamping rods are hingedly installed on the driving member, and the two first clamping rods are distributed on the left and right sides of the driving member. One end of the first clamping rod is hingedly connected to the driving member, and the other end of the first clamping rod extends out of the spoon handle and presses against the sampling spoon head, and the two first clamping rods are clamped on the left and right sides of the sampling spoon head.

[0009] By adopting the above technical solution, when in use, the experimenter selects a sampling device of corresponding specifications according to the required sampling volume, scoops soil powder with the sampling spoon head, and places it on the scale for weighing. After weighing, press the button at the end of the spoon handle to automatically fall off the disposable sampling spoon head after weighing, and then take out a new disposable sampling spoon head from the disposable sampling sleeve for weighing. After use, the disposable sampling spoon head can be directly discarded without the need to be cleaned again.

[0010] With this setup, the inner wall of the disposable sampling spoon head is smooth and has a specific curvature, which can quickly scoop up soil powder and form a flat sample surface. Combined with a variety of capacities and scale markings, the sampling volume can be precisely controlled to ensure the consistency of each sampling volume, which in turn helps improve the accuracy of the test. At the same time, traditional disposable plastic weighing spoons produce difficult-to-degrade plastic waste when used in large quantities. This sampling spoon head is made of optimizable environmentally friendly materials, and biodegradable materials can be selected according to actual needs. While meeting the needs of disposable use, it significantly reduces pollution to the environment, in line with green chemistry and environmental protection concepts. Furthermore, compared to the wastewater pollution that may be generated during the cleaning and disinfection process of reusable weighing spoons, this device is discarded as a whole after use, eliminating the need for a complex cleaning process, further reducing the environmental burden.

[0011] Although this device is disposable, in the long run, it avoids the cost of repeated experiments caused by experimental errors due to incomplete cleaning of reusable weighing spoons. It also reduces losses caused by unstable materials of low-quality disposable weighing spoons that interfere with test results. It also reduces the consumption of resources such as chemical reagents, water, and electricity required for cleaning and disinfection, as well as the high processing costs of large amounts of non-degradable plastics during waste disposal, thereby reducing laboratory operating costs. This device is disposable and discarded after use, fundamentally eliminating the problem of cross-contamination between different samples caused by sharing weighing tools and incomplete cleaning. It ensures the independence and accuracy of each sample's test results, providing more reliable protection for soil heavy metal determination experiments. The sampling spoon head is clamped and positioned using two first clamping rods.

[0012] Preferably, the first clamping rod includes a first rod body and a second rod body, one end of the first rod body is hingedly connected to the driving member, the other end of the first rod body is connected to the second rod body, one end of the second rod body is tightly connected to the first rod body, and the other end of the second rod body abuts against the sampling spoon head.

[0013] By adopting the above technical solution, the sampling spoon head is clamped and positioned by using the two second rods.

[0014] Preferably, the first rod body and the driving member are hingedly connected via a corresponding hinged rod, one end of the hinged rod is hingedly connected to the driving member, and the other end of the hinged rod is hingedly connected to the end of the first rod body.

[0015] By adopting the above technical solution, the driving member and the first rod body are hingedly connected by a hinged rod, so that the driving member drives the two first clamping rods to slide towards or away from each other during the sliding process, thereby clamping and removing the sampling spoon head.

[0016] Preferably, a first wedge and a second wedge are installed in the spoon handle along its length direction, the first wedge is located directly below the button, the first wedge and the button are connected by a corresponding connecting rod, the second wedge is integrally connected to the end of the driving member close to the button, and the first wedge and the second wedge are wedge-fitted at their ends close to each other.

[0017] By adopting the above technical solution, in specific use, after the sampling and weighing of the sampling spoon head is completed, the experimenter presses the button downward, and the button drives the first wedge block downward synchronously through the connecting rod while moving downward. During the downward process, the first wedge block drives the second wedge block to slide in the direction away from the first wedge block, and the second wedge block synchronously drives the driving member to slide, thereby causing the driving member to push the sampling spoon head out for discard.

[0018] Preferably, a first return spring is installed vertically between the bottom of the first wedge and the inner wall of the spoon handle.

[0019] By adopting the above technical solution, the first reset spring is used to assist the button in resetting.

[0020] Preferably, two second clamping rods are provided at one end of the spoon handle close to the sampling spoon head, and the two second clamping rods are distributed on the left and right sides of the sampling spoon head close to the tail end.

[0021] By adopting the above technical solution, the two second clamping rods are used to clamp and position the tail end of the sampling spoon head. Furthermore, the two first clamping rods and the two second clamping rods can be used to clamp and position different parts of the sampling spoon head, which is conducive to improving the stability of the clamping mechanism in clamping and positioning the sampling spoon head.

[0022] Preferably, the second clamping rod is an "L"-shaped structure as a whole, one end of the second clamping rod is hingedly connected to the spoon handle, the other end of the second clamping rod is pressed against the sampling spoon head, and a rubber pad is installed at the end of the second clamping rod connected to the sampling spoon head.

[0023] By adopting the above technical solution, the rubber pad has a soft texture and can provide a certain protection for the sampling spoon head. The rubber pad has a certain elasticity and can effectively increase the clamping force of the two second clamping rods on the sampling spoon head, further improving the stability of the clamping and positioning of the sampling spoon head by the two second clamping rods.

[0024] Preferably, a second return spring is installed on each side of the two second clamping rods that are close to each other.

[0025] By adopting the above technical solution, the two second reset springs are used to assist the two second clamping rods in resetting.

[0026] Preferably, the driving member is integrally connected to a pressure block at one end close to the sampling spoon head, and the pressure block is spherical as a whole. Abutment blocks are installed on the sides where the two second clamping rods are close to each other, and the sides where the two abutment blocks are close to each other are in a curved arc shape. The pressure block is used to drive the two abutment blocks to slide in a direction away from each other.

[0027] By adopting the above technical solution, when the sampling spoon head completes sampling, the driving member drives the pressing block to slide toward the two abutting blocks until the pressing block and the two abutting blocks abut each other. Under the action of the pressing block, the two abutting blocks move away from each other, and then drive the two second clamping rods to slide away from each other through the two abutting blocks. By setting the pressing block as a whole to a spherical shape and setting the two abutting blocks to curved arc surfaces, the contact between the pressing block and the abutting blocks can be made more stable, which is conducive to improving the stability of the pressing block in the process of driving the two second clamping rods to move.

[0028] Preferably, a counter is connected to one side of the spoon handle.

[0029] By adopting the above technical solution, a counter can be used to remind the experimenter of the number of disposable sampling spoon heads used, thereby facilitating the management and use of the experimenter and improving the overall experience of using the device.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. During specific use, the experimenter selects a sampling device of corresponding specifications according to the required sampling volume, scoops soil powder with the sampling spoon head, and places it on the balance for weighing. After weighing, press the button at the end of the spoon handle to automatically remove the disposable sampling spoon head after weighing. Then, take out a new disposable sampling spoon head from the disposable sampling sleeve for weighing. After use, the disposable sampling spoon head can be directly discarded without the need for further cleaning.

[0032] With this setup, the inner wall of the disposable sampling spoon head is smooth and has a specific curvature, which can quickly scoop up soil powder and form a flat sample surface. Combined with a variety of capacities and scale markings, the sampling volume can be precisely controlled to ensure the consistency of each sampling volume, which in turn helps improve the accuracy of the test. At the same time, traditional disposable plastic weighing spoons produce difficult-to-degrade plastic waste when used in large quantities. This sampling spoon head is made of optimizable environmentally friendly materials, and biodegradable materials can be selected according to actual needs. While meeting the needs of disposable use, it significantly reduces pollution to the environment, in line with green chemistry and environmental protection concepts. Furthermore, compared to the wastewater pollution that may be generated during the cleaning and disinfection process of reusable weighing spoons, this device is discarded as a whole after use, eliminating the need for a complex cleaning process, further reducing the environmental burden.

[0033] Although this device is disposable, in the long run, it avoids the cost of repeated experiments caused by experimental errors due to incomplete cleaning of reusable weighing spoons, and reduces the losses caused by the unstable materials of inferior disposable weighing spoons interfering with the test results; at the same time, it reduces the consumption of resources such as chemical reagents, water and electricity required for cleaning and disinfection, as well as the high processing costs caused by the large amount of non-degradable plastics in the waste treatment process, which comprehensively reduces the operating costs of the laboratory. This device is for single use and is directly discarded after use. It eliminates the problem of cross-contamination between different samples caused by sharing weighing tools and incomplete cleaning, and ensures the independence and accuracy of the test results of each sample, providing a more reliable guarantee for soil heavy metal determination experiments. The sampling spoon head is clamped and positioned using two first clamping rods;

[0034] 2. When the sampling spoon has finished weighing, the experimenter presses the button downward. As the button moves downward, it drives the first wedge downward synchronously through the connecting rod. As the first wedge moves downward, it drives the second wedge to slide away from the first wedge. The second wedge also drives the driving member to slide, causing the driving member to push out the sampling spoon for disposal.

[0035] 3. After the sampling spoon head has completed sampling, the driving member drives the pressing block to slide toward the two abutting blocks until the pressing block and the two abutting blocks abut against each other. Under the action of the pressing block, the two abutting blocks move away from each other, and then drive the two second clamping rods to slide away from each other through the two abutting blocks. Setting the pressing block as a whole in a spherical shape and setting the two abutting blocks as curved arc surfaces can make the contact between the pressing block and the abutting blocks more stable, which is conducive to improving the stability of the pressing block in driving the two second clamping rods to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0037] Figure 2 This is a structural diagram showing the positional relationship between the first wedge block, the second wedge block, and the driving member in an embodiment of the present application;

[0038] Figure 3 yes Figure 2 The enlarged schematic diagram in the middle;

[0039] Figure 4 It is a structural diagram showing the position relationship of the first return spring in detail in an embodiment of the present application.

[0040] Figure numerals: 1, spoon handle; 2, sampling spoon head; 3, button; 4, first clamping rod; 41, first rod body; 42, second rod body; 5, driving member; 6, hinged rod; 7, first wedge block; 8, second wedge block; 9, first return spring; 10, second clamping rod; 11, rubber pad; 12, second return spring; 13, pressure block; 14, abutment block; 15, counter. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0042] Example:

[0043] The present application embodiment discloses a disposable soil powder sample sampling device, referring to Figure 1 and Figure 2, including a spoon handle 1 and a sampling spoon head 2. The spoon head is made of degradable paper, and the inner wall of the spoon head is smooth and has a specific curvature, which can facilitate the rapid scooping of soil powder and form a flat sample surface, while ensuring the consistency of the sampling amount. The spoon head capacity is set in a variety of specifications, which can be distinguished by the logo on the spoon head. A clamping mechanism for clamping the sampling spoon head 2 is added near the front end of the spoon handle 1, and the spoon handle 1 and the sampling spoon head 2 are connected as a whole through the clamping mechanism. At the same time, a button 3 is added near the tail end of the spoon handle 1. The button 3 has the function of releasing the disposable sampling spoon head 2 with one button, which can effectively reduce human contact and keep the sample clean. The entire spoon handle 1 adopts a hollow cylindrical structure and the spoon handle 1 is provided with anti-slip threads on the side, which can effectively prevent the spoon handle 1 from falling out of the hand of the staff during the sampling process.

[0044] During specific use, the experimenter selects a sampling device of corresponding specifications according to the required sampling volume, scoops up soil powder with the sampling spoon head 2, and places it on the scale for weighing. After weighing, press the button 3 at the end of the spoon handle 1 to automatically fall off the disposable sampling spoon head 2 after weighing is completed, and then take out a new disposable sampling spoon head 2 from the disposable sampling sleeve for weighing. The disposable sampling spoon head 2 can be directly discarded after use without the need to be cleaned again.

[0045] With this configuration, the inner wall of the disposable sampling spoon head 2 is smooth and has a specific curvature, which can quickly scoop up soil powder and form a flat sample surface. Combined with a variety of capacities and scale markings, the sampling volume can be precisely controlled to ensure consistency in the amount of sampling each time, thereby improving the accuracy of the test. At the same time, traditional disposable plastic weighing spoons generate difficult-to-degrade plastic waste when used in large quantities. However, this sampling spoon head 2 is made of optimizable environmentally friendly materials, and biodegradable materials can be selected according to actual needs. While meeting the needs of disposable use, it significantly reduces pollution to the environment, in line with green chemistry and environmental protection concepts. Furthermore, compared to the wastewater pollution that may be generated during the cleaning and disinfection process of reusable weighing spoons, this device is discarded as a whole after use, eliminating the need for a complex cleaning process, further reducing the environmental burden.

[0046] Although this device is disposable, in the long run, it avoids the cost of repeated experiments caused by experimental errors due to incomplete cleaning of reusable weighing spoons. It also reduces losses caused by unstable materials of low-quality disposable weighing spoons that interfere with test results. It also reduces the consumption of resources such as chemical reagents, water, and electricity required for cleaning and disinfection, as well as the high processing costs of large amounts of non-degradable plastics during waste disposal, thereby reducing laboratory operating costs. This device is disposable and directly discarded after use, fundamentally eliminating the cross-contamination problem caused by sharing weighing tools and incomplete cleaning between different samples. It ensures the independence and accuracy of each sample's test results, providing more reliable protection for soil heavy metal determination experiments.

[0047] Specifically, refer to Figure 2 and Figure 3 The clamping mechanism includes two first clamping rods 4. A driving member 5 is mounted along the length of the spoon handle 1. The two first clamping rods 4 are hingedly mounted on the driving member 5 and are located on either side of the driving member 5. One end of the first clamping rod 4 is hingedly connected to the driving member 5. The other end of the first clamping rod 4 extends out of the spoon handle 1 and abuts against the sampling spoon head 2. The two first clamping rods 4 clamp onto the left and right sides of the sampling spoon head 2, thereby clamping the sampling spoon head 2 in place. The two first clamping rods 4 are used to clamp and position the front end of the sampling spoon head 2.

[0048] In specific use, after the sampling spoon head 2 has finished sampling and weighing, the experimenter presses the button 3 downward. The button 3 moves downward, driving the driving member 5 toward the sampling spoon head 2. During this process, the two first clamping rods 4 move away from each other, releasing the two first clamping rods 4 from their position on the sampling spoon head 2, thereby achieving automatic removal of the sampling spoon head 2. The driving member 5 pushes the sampling spoon head 2 away from the spoon handle 1 during the automatic removal process, thereby helping the sampling spoon head 2 to fall off more smoothly.

[0049] Specifically, refer to Figure 2 and Figure 3 The first clamping rod 4 includes a first rod body 41 and a second rod body 42. The first rod body 41 is generally rectangular, with one end hingedly connected to the driving member 5 and the other end connected to the second rod body 42. The second rod body 42 is generally L-shaped, with one end of the second rod body 42 fastened to the first rod body 41 by a fastening bolt. The other end of the second rod body 42 abuts against the sampling spoon head 2, thereby clamping and positioning the sampling spoon head 2.

[0050] Specifically, refer to Figure 2 and Figure 3The first rod body 41 and the driving member 5 are hingedly connected through the corresponding hinged rod 6. One end of the hinged rod 6 is hingedly connected to the driving member 5, and the other end of the hinged rod 6 is hingedly connected to the end of the first rod body 41. The hinged rod 6 is used to hinge the driving member 5 and the first rod body 41, so that the driving member 5 drives the two first clamping rods 4 to slide toward or away from each other during the sliding process, thereby clamping and falling off the sampling spoon head 2.

[0051] Specifically, refer to Figure 2 and Figure 3 A first wedge 7 and a second wedge 8 are installed along the length of the spoon handle 1. The first wedge 7 is located directly below the button 3 and is connected to the bottom of the button 3. The second wedge 8 is integrally connected to the end of the driver 5 near the button 3. The first wedge 7 and the second wedge 8 are wedge-shaped with each other at their ends. In specific use, after the sampling spoon head 2 has completed sampling and weighing, the experimenter presses the button 3 downward. The button 3 moves downward and simultaneously drives the first wedge 7 downward through the connecting rod. During the downward movement, the first wedge 7 drives the second wedge 8 to slide away from the first wedge 7, and the second wedge 8 simultaneously drives the driver 5 to slide, thereby causing the driver 5 to push out the sampling spoon head 2 for discarding.

[0052] Reference Figure 2 、 Figure 3 as well as Figure 4 A first reset spring 9 is installed vertically between the bottom of the first wedge 7 and the inner wall of the spoon handle 1, and the first reset spring 9 assists the button 3 in resetting.

[0053] Further, refer to Figure 2 、 Figure 3 as well as Figure 4 Two second clamping rods 10 are attached to the end of the spoon handle 1 near the sampling spoon head 2. The two second clamping rods 10 are located on the left and right sides of the sampling spoon head 2 near the tail end. The two second clamping rods 10 are used to clamp and position the tail end of the sampling spoon head 2. Furthermore, the two first clamping rods 4 and the two second clamping rods 10 can be used to clamp and position different parts of the sampling spoon head 2, which helps to improve the stability of the clamping mechanism in clamping and positioning the sampling spoon head 2.

[0054] Specifically, refer to Figure 2 、 Figure 3 as well as Figure 4The second clamping rod 10 has an "L"-shaped structure as a whole. One end of the second clamping rod 10 is hingedly connected to the spoon handle 1, and the other end of the second clamping rod 10 is pressed against the sampling spoon head 2. A rubber pad 11 is installed at the end where the second clamping rod 10 is connected to the sampling spoon head 2. The rubber pad 11 is soft in texture and can provide a certain protection for the sampling spoon head 2. The rubber pad 11 has a certain elasticity, which can effectively improve the clamping force of the two second clamping rods 10 on the sampling spoon head 2, and further improve the stability of the clamping and positioning of the sampling spoon head 2 by the two second clamping rods 10.

[0055] Further, refer to Figure 2 、 Figure 3 as well as Figure 4 A second return spring 12 is installed on the side where the two second clamping rods 10 are close to each other, and the two second return springs 12 are used to assist the two second clamping rods 10 to reset.

[0056] Specifically, refer to Figure 2 、 Figure 3 as well as Figure 4 , the end of the driving member 5 close to the sampling spoon head 2 is integrally connected with a pressure block 13, and the pressure block 13 is spherical as a whole. The sides of the two second clamping rods 10 close to each other are both installed with abutment blocks 14, and the sides of the two abutment blocks 14 close to each other are both in the shape of a curved arc. When the sampling spoon head 2 completes sampling, the driving member 5 drives the pressure block 13 to slide in the direction close to the two abutment blocks 14 until the pressure block 13 and the two abutment blocks 14 abut. Under the action of the pressure block 13, the two abutment blocks 14 move in the direction away from each other, and then drive the two second clamping rods 10 to slide in the direction away from each other through the two abutment blocks 14. Setting the pressure block 13 as a spherical shape and setting the two abutment blocks 14 as curved arc surfaces can make the contact between the pressure block 13 and the abutment blocks 14 more stable, which is conducive to improving the stability of the pressure block 13 driving the two second clamping rods 10 to move.

[0057] In this embodiment, referring to Figure 1 and Figure 2 A counter 15 is connected to one side of the spoon handle 1. The counter 15 can remind the experimenter of the number of disposable sampling spoon heads 2 used, thereby facilitating the management and use of the experimenter and improving the experience of using the entire device.

[0058] The implementation principle of the disposable soil powder sample sampling device of the embodiment of the present application is:

[0059] During specific use, the experimenter selects a sampling device of corresponding specifications according to the required sampling volume, scoops up soil powder with the sampling spoon head 2, and places it on the scale for weighing. After weighing, press the button 3 at the end of the spoon handle 1 to automatically fall off the disposable sampling spoon head 2 after weighing is completed, and then take out a new disposable sampling spoon head 2 from the disposable sampling sleeve for weighing. The disposable sampling spoon head 2 can be directly discarded after use without the need to be cleaned again.

[0060] With this configuration, the inner wall of the disposable sampling spoon head 2 is smooth and has a specific curvature, which can quickly scoop up soil powder and form a flat sample surface. Combined with a variety of capacities and scale markings, the sampling volume can be precisely controlled to ensure consistency in the amount of sampling each time, thereby improving the accuracy of the test. At the same time, traditional disposable plastic weighing spoons generate difficult-to-degrade plastic waste when used in large quantities. However, this sampling spoon head 2 is made of optimizable environmentally friendly materials, and biodegradable materials can be selected according to actual needs. While meeting the needs of disposable use, it significantly reduces pollution to the environment, in line with green chemistry and environmental protection concepts. Furthermore, compared to the wastewater pollution that may be generated during the cleaning and disinfection process of reusable weighing spoons, this device is discarded as a whole after use, eliminating the need for a complex cleaning process, further reducing the environmental burden.

[0061] Although this device is disposable, in the long run, it avoids the cost of repeated experiments caused by experimental errors due to incomplete cleaning of reusable weighing spoons. It also reduces losses caused by unstable materials of low-quality disposable weighing spoons that interfere with test results. It also reduces the consumption of resources such as chemical reagents, water, and electricity required for cleaning and disinfection, as well as the high processing costs of large amounts of non-degradable plastics during waste disposal, thereby reducing laboratory operating costs. This device is disposable and directly discarded after use, fundamentally eliminating the cross-contamination problem caused by sharing weighing tools and incomplete cleaning between different samples. It ensures the independence and accuracy of each sample's test results, providing more reliable protection for soil heavy metal determination experiments.

[0062] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. Disposable soil powder sample sampling device, characterized by: The invention comprises a spoon handle (1) and a sampling spoon head (2), wherein a clamping mechanism for clamping the sampling spoon head (2) is added in the spoon handle (1), and the spoon handle (1) and the sampling spoon head (2) are connected as a whole through the clamping mechanism, and a button (3) is added near the tail end of the spoon handle (1), and the button (3) is used to release the sampling spoon head (2); the clamping mechanism comprises two first clamping rods (4), and a driving member (5) is installed in the spoon handle (1) along its length direction, and the two first clamping rods (4) are hingedly installed on the driving member (5), and the two first clamping rods (4) are distributed on the left and right sides of the driving member (5), one end of the first clamping rod (4) is hingedly connected to the driving member (5), and the other end of the first clamping rod (4) extends out of the spoon handle (1) and presses against the sampling spoon head (2), and the two first clamping rods (4) are clamped on the left and right sides of the sampling spoon head (2).

2. The disposable soil powder sample sampling device according to claim 1, characterized in that: The first clamping rod (4) comprises a first rod body (41) and a second rod body (42), one end of the first rod body (41) is hingedly connected to the driving member (5), the other end of the first rod body (41) is connected to the second rod body (42), one end of the second rod body (42) is tightly connected to the first rod body (41), and the other end of the second rod body (42) abuts against the sampling spoon head (2).

3. The disposable soil powder sample sampling device according to claim 2, characterized in that: The first rod body (41) and the driving member (5) are hingedly connected via a corresponding hinged rod (6), one end of the hinged rod (6) is hingedly connected to the driving member (5), and the other end of the hinged rod (6) is hingedly connected to the end of the first rod body (41).

4. The disposable soil powder sample sampling device according to claim 3, characterized in that: A first wedge block (7) and a second wedge block (8) are installed in the spoon handle (1) along its length direction. The first wedge block (7) is located directly below the button (3). The first wedge block (7) and the button (3) are connected via a corresponding connecting rod. The second wedge block (8) is integrally connected to an end of the driving member (5) close to the button (3). The first wedge block (7) and the second wedge block (8) are wedge-fitted at their ends close to each other.

5. The disposable soil powder sample sampling device according to claim 4, characterized in that: A first return spring (9) is installed vertically between the bottom of the first wedge (7) and the inner wall of the spoon handle (1).

6. The disposable soil powder sample collection device according to claim 5, characterized in that: Two second clamping rods (10) are provided at one end of the spoon handle (1) close to the sampling spoon head (2), and the two second clamping rods (10) are distributed on the left and right sides of the sampling spoon head (2) close to the tail end.

7. The disposable soil powder sample collection device according to claim 6, characterized in that: The second clamping rod (10) is in an "L"-shaped structure as a whole. One end of the second clamping rod (10) is hingedly connected to the spoon handle (1), and the other end of the second clamping rod (10) is pressed against the sampling spoon head (2). A rubber pad (11) is installed at the end of the second clamping rod (10) connected to the sampling spoon head (2).

8. The disposable soil powder sample collection device according to claim 7, characterized in that: A second return spring (12) is installed on each side of the two second clamping rods (10) that are close to each other.

9. The disposable soil powder sample collection device according to claim 8, characterized in that: The driving member (5) is integrally connected to a pressure block (13) at one end close to the sampling spoon head (2); the pressure block (13) is spherical in shape as a whole; abutment blocks (14) are installed on the sides close to each other of the two second clamping rods (10); the sides close to each other of the two abutment blocks (14) are in a curved arc shape; the pressure block (13) is used to drive the two abutment blocks (14) to slide in a direction away from each other.

10. The disposable soil powder sample collection device according to claim 9, characterized in that: One side of the spoon handle (1) is connected to a counter (15).

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