Auxiliary test device for methylene blue test of machine-made sand

Abstract

The utility model discloses an auxiliary test device for a methylene blue test of machine-made sand, and relates to the technical field of civil and architectural engineering detection. The device comprises a syringe, wherein a liquid pumping mechanism is arranged on the syringe; the liquid pumping mechanism comprises a connecting rod slidably mounted on the inner wall of the bottom end of the syringe, the bottom end of the connecting rod extends out of the syringe, a piston is slidably mounted on the inner wall of the syringe, the bottom end of the piston is fixedly connected with the connecting rod, and a first pulling plate is fixedly mounted at the bottom end of the connecting rod. Through the arrangement of the liquid pumping mechanism, the problems that the test efficiency is low or the test data is inaccurate due to the fact that the methylene blue solution cannot be sucked out or is excessively sucked when a green hand operates when a tester mostly adopts the thin end of an ear washing bulb to abut against the upper end of a pipette to roughly suck a certain amount of the methylene blue solution in actual operation are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of civil engineering detection, in particular to an auxiliary test device for machine-made sand methylene blue test. Background Art

[0002] According to "Construction Sand" GB / T 14684-2022 and "Standard for Inspection Methods of Ordinary Sand and Gravel" JGJ 52-2006, the methylene blue test should be carried out as follows:

[0003] Weigh 200g of the sample, accurate to 1g. Pour the sample into a beaker containing (500±5)mL of distilled water, and stir with an impeller stirrer at (600±60)r / min for 5min to form a suspension, then continue stirring at (400±40)r / min until the end of the test.

[0004] Add 5mL of methylene blue solution to the suspension, stir at (400±40) r / min for at least 1min, then use a glass rod to take a drop of suspension (the drop of suspension should make the diameter of the precipitate within 8-12mm), and drop it on the filter paper (placed on an empty beaker or other suitable support so that the surface of the filter paper does not contact any solid or liquid). If no color halo appears around the precipitate, add another 5mL of methylene blue solution, continue stirring for 1min, and then use a glass rod to take a drop of suspension and drop it on the filter paper. If no color halo appears around the precipitate, repeat the above steps until a stable light blue color halo of about 1mm wide appears around the precipitate. At this time, continue stirring without adding methylene blue solution, and perform a dip-dyeing test every 1min. If the color halo disappears within 4min, add another 5mL of methylene blue solution; if the color halo disappears in the 5th minute, add another 2mL of methylene blue solution. In both cases, the stirring and dipping test should be continued until the color halo can last for 5 minutes.

[0005] However, the specification does not give a detailed description of the method for quantitatively adding methylene blue solution. In actual operation, test personnel often use the thin end of the ear bulb to press against the upper end of the pipette to roughly absorb a certain amount of methylene blue solution. When novice operators operate, it is easy to fail to absorb or absorb too much methylene blue solution, resulting in low test efficiency or inaccurate test data. Utility Model Content

[0006] The utility model aims to provide an auxiliary test device for a machine-made sand methylene blue test. By setting a liquid extraction mechanism, the utility model solves the problem that in actual operation, test personnel often use the thin end of an ear washing bulb to press against the upper end of a pipette to roughly absorb a certain amount of methylene blue solution. When a novice operates, it is easy to fail to absorb or absorb too much methylene blue solution, resulting in low test efficiency or inaccurate test data.

[0007] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0008] The utility model is a machine-made sand methylene blue test auxiliary test device, comprising a syringe, on which a liquid extraction mechanism is arranged;

[0009] The liquid extraction mechanism includes a connecting rod slidably mounted on the inner wall of the bottom end of the syringe, the bottom end of the connecting rod extends outside the syringe, a piston is slidably mounted on the inner wall of the syringe, the bottom end of the piston is fixedly connected to the connecting rod, and a pull plate is fixedly mounted on the bottom end of the connecting rod.

[0010] Furthermore, a soft gasket 1 is fixedly installed on the top of the pull plate 1, the connecting rod passes through the soft gasket 1, an anti-slip sheet is fixedly installed on the bottom end of the pull plate 1, two pull plates 2 are fixedly installed on the outer wall of the injection barrel, and soft gaskets 2 are respectively fixedly installed on the tops of the two pull plates 2.

[0011] Furthermore, a connecting hard tube 1 is fixedly installed on the top of the injection barrel, a threaded groove 1 is opened on the outer wall of the connecting hard tube 1, a connecting hard tube 2 is threadedly sleeved on the threaded groove 1, a sealing gasket is fixedly sleeved on the outer wall of the connecting hard tube 1, the top of the sealing gasket is in contact with the connecting hard tube 2, and a connecting hose 1 is fixedly installed on the end of the connecting hard tube 2.

[0012] Furthermore, a connecting hard pipe three is fixedly installed at the end of the connecting hose one, a hand-held plate is fixedly sleeved on the outer wall of the connecting hard pipe three, a thread groove two is opened on the outer wall of the connecting hard pipe three, and a connecting hard pipe four is sleeved in the inner thread of the thread groove two.

[0013] Furthermore, a thread groove three is provided on the inner wall of the connecting hard pipe four, a connecting hard pipe five is installed on the inner thread of the thread groove three, and a hard pipe scale line is provided on the outer wall of the connecting hard pipe five.

[0014] Furthermore, a pipette is fixedly installed at the bottom end of the connecting hard tube 5, a liquid extraction tube is fixedly installed at the bottom end of the pipette, and a plurality of scale lines are opened on the outer wall of the injection barrel.

[0015] The utility model has the following beneficial effects:

[0016] By setting up a liquid extraction mechanism, when it is necessary to extract liquid, the pull plate 1 on the connecting rod can be pulled to drive the piston in the syringe to move upward, so that the liquid is sucked into the syringe from the outside through the pipette, and after the liquid is taken out, the pull plate 1 on the connecting rod is pushed again to drive the piston in the syringe to move downward, so that the liquid in the syringe is injected onto the test paper, so that the test solution can be quantitatively and stably extracted. When a novice operates, it is easy to fail to suck out or over-absorb the methylene blue solution, resulting in inaccurate data. The utility model can also be used repeatedly in experiments to improve the test efficiency of the detection personnel;

[0017] By providing a plurality of pull plates, soft gaskets and anti-slip sheets, when the user operates the device, the user can place the index finger and the middle finger on the two pull plates 2, and the thumb on the pull plate 1. At this time, the soft gasket 2 will protect the user's fingers, and the anti-slip sheet on the pull plate 1 will increase the friction force on the user's fingers, thereby reducing the errors caused by operational errors due to finger sliding, so that the device can be more firmly fixed in the desired position, reducing the risk of accidental movement or tilting, and ensuring the safety and accuracy of operation.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a structural schematic diagram of an auxiliary test device for machine-made sand methylene blue test of the utility model;

[0021] Figure 2 This is a front cross-sectional structural schematic diagram of a machine-made sand methylene blue test auxiliary test device of the utility model;

[0022] Figure 3 This utility model is a kind of machine-made sand methylene blue test auxiliary test device Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0023] Figure 4 This utility model is a kind of machine-made sand methylene blue test auxiliary test device Figure 2 A schematic diagram of the enlarged structure of B;

[0024] Figure 5 This utility model is a kind of machine-made sand methylene blue test auxiliary test device Figure 2Schematic diagram of the enlarged structure of C in the figure.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] Syringe; 2. Connecting rod; 3. Piston; 4. Pull plate 1; 5. Soft gasket 1; 6. Anti-skid sheet; 7. Pull plate 2; 8. Soft gasket 2; 9. Connecting hard tube 1; 10. Threaded groove 1; 11. Connecting hard tube 2; 121. Connecting hose 1; 122. Connecting hard tube 3; 12. Sealing gasket; 13. Hand-held plate; 14. Threaded groove 2; 15. Connecting hard tube 4; 16. Threaded groove 3; 17. Connecting hard tube 5; 171. Hard tube graduation line; 18. Pipette; 19. Extraction tube; 20. Graduation line. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-5 As shown, the utility model is an auxiliary test device for machine-made sand methylene blue test, comprising a syringe 1, on which a liquid extraction mechanism is provided;

[0029] The liquid extraction mechanism includes a connecting rod 2 slidably mounted on the inner wall of the bottom end of the injection barrel 1, the bottom end of the connecting rod 2 extends to the outside of the injection barrel 1, a piston 3 is slidably mounted on the inner wall of the injection barrel 1, the bottom end of the piston 3 is fixedly connected to the connecting rod 2, and a pull plate 4 is fixedly mounted on the bottom end of the connecting rod 2.

[0030] Among them Figure 1 and Figure 3 As shown, a soft gasket 5 is fixedly installed on the top of the pull plate 4, the connecting rod 2 passes through the soft gasket 5, an anti-slip sheet 6 is fixedly installed on the bottom end of the pull plate 4, two pull plates 2 7 are fixedly installed on the outer wall of the injection cylinder 1, and soft gaskets 2 8 are fixedly installed on the tops of the two pull plates 2 7 respectively.

[0031] By providing the anti-slip sheet 6, the device can be prevented from sliding or shifting during operation, and the friction force can be increased, so that the device can be more firmly fixed in the desired position, the risk of accidental movement or tilting can be reduced, and the safety and accuracy of the operation can be ensured.

[0032] Among them Figure 2 and Figure 4As shown, a connecting hard tube 9 is fixedly installed on the top of the injection barrel 1, a threaded groove 10 is opened on the outer wall of the connecting hard tube 9, a connecting hard tube 2 11 is threadedly sleeved on the threaded groove 10, a sealing gasket 12 is fixedly sleeved on the outer wall of the connecting hard tube 9, the top of the sealing gasket 12 is in contact with the connecting hard tube 2 11, and a connecting hose 121 is fixedly installed on the end of the connecting hard tube 2 11.

[0033] By providing the threaded groove 10, a firm connection between the liquid extraction tube and other components can be ensured, thereby avoiding loosening or breaking during use and ensuring the safety of experimental operation.

[0034] As shown in the figure, a connecting hard pipe 3 122 is fixedly installed at the end of a connecting hose 121, a hand-held plate 13 is fixedly sleeved on the outer wall of the connecting hard pipe 3 122, a thread groove 2 14 is opened on the outer wall of the connecting hard pipe 3 122, and a connecting hard pipe 4 15 is threadedly sleeved in the thread groove 2 14.

[0035] By providing the thread groove 14, better sealing performance can be provided, effectively preventing liquid from leaking at the connection point, and ensuring the accuracy and stability of the experimental operation.

[0036] Among them Figure 5 As shown, a thread groove three 16 is provided on the inner wall of the connecting hard pipe four 15 , a connecting hard pipe five 17 is installed in the inner thread of the thread groove three 16 , and a hard pipe scale line 171 is provided on the outer wall of the connecting hard pipe five 17 .

[0037] The thread groove 16 is provided to facilitate disassembly and replacement, and facilitates cleaning, maintenance and replacement of liquid extraction tubes of different specifications or types, thereby improving the flexibility and convenience of operation.

[0038] Among them Figure 2 and Figure 5 As shown, a pipette 18 is fixedly installed at the bottom end of the connecting hard tube 5 17 , a liquid extraction tube 19 is fixedly installed at the bottom end of the pipette 18 , and a plurality of scale lines 20 are opened on the outer wall of the injection barrel 1 .

[0039] By providing the pipette 18, a specified volume of liquid can be precisely and accurately sucked and released to transfer a sample, a reagent or a solution from one container to another, thereby realizing a liquid pipetting operation.

[0040] A specific application of this embodiment is: when using, first place the device in the corresponding position, then clean the device and place the liquid extraction tube 19 into the liquid, then pull the pull plate 14 on the connecting rod 2, thereby driving the piston 3 in the syringe barrel 1 to move upward, so that the methylene blue liquid is sucked into the pipette from the dark wide-mouth bottle, and the liquid surface at the lower edge of the solution is flush with the fixed volume scale line of the pipette. When pulling, the soft gasket 5 will protect the user's fingers, thereby avoiding discomfort caused by long-term use. After taking out the liquid, push the pull plate 14 on the connecting rod 2 again, thereby driving the piston 3 in the syringe barrel 1 to move downward, thereby injecting the liquid in the pipette into the test suspension being stirred in the beaker. When injecting, the user can put the index finger and middle finger on the two pull plates 17 and put the thumb on the pull plate 14. At this time, the soft gasket 18 will protect the user's fingers, and the anti-slip sheet 6 on the pull plate 14 will increase the friction on the user's fingers, thereby reducing the error caused by operating errors caused by finger sliding.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A machine-made sand methylene blue test auxiliary test device, comprising a syringe (1), characterized in that: The injection barrel (1) is provided with a liquid extraction mechanism; The liquid extraction mechanism comprises a connecting rod (2) slidably mounted on the inner wall of the bottom end of the injection barrel (1), the bottom end of the connecting rod (2) extending outside the injection barrel (1), a piston (3) slidably mounted on the inner wall of the injection barrel (1), the bottom end of the piston (3) being fixedly connected to the connecting rod (2), and a pull plate (4) being fixedly mounted on the bottom end of the connecting rod (2).

2. The machine-made sand methylene blue test auxiliary test device according to claim 1, characterized in that: A soft gasket one (5) is fixedly mounted on the top of the pull plate one (4), the connecting rod (2) passes through the soft gasket one (5), an anti-slip sheet (6) is fixedly mounted on the bottom of the pull plate one (4), two pull plates two (7) are fixedly mounted on the outer wall of the injection cylinder (1), and soft gaskets two (8) are respectively fixedly mounted on the tops of the two pull plates two (7).

3. The machine-made sand methylene blue test auxiliary test device according to claim 1, characterized in that: A connecting hard tube 1 (9) is fixedly mounted on the top end of the injection barrel (1), a thread groove 1 (10) is provided on the outer wall of the connecting hard tube 1 (9), a connecting hard tube 2 (11) is threadedly sleeved on the thread groove 1 (10), a sealing gasket (12) is fixedly sleeved on the outer wall of the connecting hard tube 1 (9), the top end of the sealing gasket (12) is in contact with the connecting hard tube 2 (11), and a connecting hose 1 (121) is fixedly mounted on the end of the connecting hard tube 2 (11).

4. The machine-made sand methylene blue test auxiliary test device according to claim 3, characterized in that: A connecting hard pipe 3 (122) is fixedly mounted on the end of the connecting hose 1 (121), a hand-held plate (13) is fixedly sleeved on the outer wall of the connecting hard pipe 3 (122), a thread groove 2 (14) is opened on the outer wall of the connecting hard pipe 3 (122), and a connecting hard pipe 4 (15) is sleeved on the inner thread of the thread groove 2 (14).

5. The machine-made sand methylene blue test auxiliary test device according to claim 4, characterized in that: The inner wall of the connecting hard pipe four (15) is provided with a thread groove three (16), the inner thread of the thread groove three (16) is provided with a connecting hard pipe five (17), and the outer wall of the connecting hard pipe five (17) is provided with a hard pipe scale mark (171).

6. The machine-made sand methylene blue test auxiliary test device according to claim 5, characterized in that: A pipette (18) is fixedly mounted on the bottom end of the connecting hard tube 5 (17), a liquid extraction tube (19) is fixedly mounted on the bottom end of the pipette (18), and a plurality of scale lines (20) are provided on the outer wall of the injection barrel (1).

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