CN113198559A

CN113198559A - Fastening device for preventing test tube from loosening

Info

Publication number: CN113198559A
Application number: CN202110383934.8A
Authority: CN
Inventors: 陈为敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2021-08-03

Abstract

The invention relates to the technical field of chemical test tubes and discloses a fastening device for preventing a test tube from loosening. This prevent that test tube is not hard up tightly installs, appear becoming flexible between test tube and test tube clamp, outside air can follow spacing hole entering seal box this moment, promote the slider to move to the outside for two passageways of piezo-resistor, the opposite face polarity of two magnet and electro-magnet is opposite, when two passageways of piezo-resistor, electro-magnet two inhales with two magnet mutually, make the test tube clamp tightly install the test tube once more, prevent that the test tube from dropping and appearing damage or inside dangerous reagent and cause the injury to operating personnel, the security in the experimentation has been improved.

Description

Fastening device for preventing test tube from loosening

Technical Field

The invention relates to the technical field of chemical test tubes, in particular to a fastening device for preventing a test tube from loosening.

Background

At present, when a chemical test is carried out in a laboratory, a test tube is often used, liquid is difficult to avoid flowing out of the exterior of the test tube in the test process, and a plurality of chemical articles are corrosive and can injure hands of people; sometimes can be through heating the test tube, experiment to the material wherein, but the test tube outside scalds very much after the heating and can't take, only waits to go on again after its cooling, can influence experimental accuracy nature like this, and in order to improve the accurate nature of experiment, operating personnel often uses the test tube clamp to remove the test tube.

But when carrying out the centre gripping to the test tube, because the particularity of test tube, at the in-process by the centre gripping, receiving under the external force influence such as rocking, it is not hard up to cause the centre gripping very easily, the condition that drops by the centre gripping thing appears even, corrosive chemical reagent can splash out and cause the injury to operating personnel, still can lead to the test tube to break, increase the experimentation cost, consequently, we have provided one kind and have prevented that the test tube is not hard up and tightly close the device and solve above problem, can tightly close the test tube automatically when the test tube is not hard up, and easy operation has improved the security in the experimentation, avoid the test tube damaged, save the experimentation cost.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a fastening device for preventing a test tube from loosening, which has the advantages of simple operation, improvement of safety in the experimental process, avoidance of test tube damage and saving of experimental cost, and solves the problems that when the test tube is clamped, due to the particularity of the test tube, clamping loosening is easily caused under the influence of external forces such as shaking and the like in the clamping process, even clamped objects fall off, some corrosive chemical reagents can splash out to damage operators, the test tube can be broken, and the experimental cost is increased.

(II) technical scheme

In order to realize the purposes of simple operation, improving the safety in the experimental process, avoiding the damage of a test tube and saving the experimental cost, the invention provides the following technical scheme: a tight fastening device for preventing test tubes from loosening comprises a test tube clamp, a closed box and an air cavity, wherein a limiting hole is formed in the test tube clamp, a movable rod is inserted in the limiting hole, a first dielectric plate is fixedly installed in the movable rod, a first positive plate is fixedly installed in the test tube clamp, a first negative plate is fixedly installed in the test tube clamp, a first piezoresistor is fixedly installed in the test tube clamp, a sliding block is movably connected in the closed box, a second dielectric plate is fixedly installed in the sliding block, a second negative plate is fixedly installed in the test tube clamp, a second piezoresistor is fixedly installed in the test tube clamp, a second positive plate is fixedly installed in the test tube clamp, a first magnetic block is movably connected in the air cavity, a connecting spring is movably connected in the inner side of the first magnetic block, and a first electromagnet is movably connected in the outer side of the connecting spring, the outer side of the test tube clamp is movably connected with a second electromagnet, the right side of the second electromagnet is movably connected with a movable spring, the right side of the movable spring is movably connected with a second magnetic block, and the bottom of the closed box is movably connected with an electromagnetic valve.

The test tube has two, and the inner structure of left side test tube clamp and right side test tube clamp is the same completely, and the seal box is located the inside of test tube clamp, and when carrying out the centre gripping to the test tube, the test tube clamp removes to both sides.

The positive plate I and the negative plate I are identical in size and shape, and are symmetrically distributed relative to the dielectric plate, and when the dielectric plate I moves, the relative area between the positive plate I and the negative plate I is increased.

The first voltage sensitive resistor is electrically connected with the first negative plate, when the current between the first positive plate and the first negative plate is larger than the minimum path voltage of the first voltage sensitive resistor, the first voltage sensitive resistor is connected with the first negative plate in an on-way mode, the second voltage sensitive resistor is electrically connected with the second negative plate, the current between the second positive plate and the second negative plate is larger than the minimum path voltage of the second voltage sensitive resistor, and the second voltage sensitive resistor is connected with the on-way mode.

The second positive plate and the second negative plate are symmetrically distributed around the second dielectric plate, the length of the second positive plate is smaller than that of the second dielectric plate, and when the second dielectric plate moves, the relative area between the second positive plate and the second negative plate is increased.

The electromagnetic valve is a timing one-way control valve and is electrically connected with the piezoresistor, and when the piezoresistor is connected, the electromagnetic valve is opened to evacuate gas in the closed box.

The first magnet and the first electromagnet are opposite in polarity, the first electromagnet is electrically connected with the first voltage dependent resistor, and when the first voltage dependent resistor is switched on, the first electromagnet is electrified and attracted with the first magnet.

The opposite surfaces of the second magnet and the second electromagnet are opposite in polarity, the second electromagnet is electrically connected with the second piezoresistor, and when the second piezoresistor is switched on, the second electromagnet and the second magnet attract each other, so that the test tube clamp can tightly clamp the test tube again.

(III) advantageous effects

Compared with the prior art, the invention provides a fastening device for preventing a test tube from loosening, which has the following beneficial effects:

1. this prevent that test tube is not hard up tightly installs, appear becoming flexible between test tube and test tube clamp, outside air can follow spacing hole entering seal box this moment, promote the slider to move to the outside for two passageways of piezo-resistor, the opposite face polarity of two magnet and electro-magnet is opposite, when two passageways of piezo-resistor, electro-magnet two inhales with two magnet mutually, make the test tube clamp tightly install the test tube once more, prevent that the test tube from dropping and appearing damage or inside dangerous reagent and cause the injury to operating personnel, the security in the experimentation has been improved.

2. This prevent that test tube is not hard up tightly installs, when carrying out the centre gripping to the test tube, test tube extrusion movable rod, the inside fixedly connected with of movable rod dielectric plate one for a piezo-resistor access, solenoid valve and a piezo-resistor electric connection, an electro-magnet circular telegram is inhaled mutually with a magnetic path, evacuates the inside gas of seal box, and the seal box is inside to be in the vacuum state, tightly installs for test tube automatic adjustment and provides the condition, easy operation, and the security is high, and has practiced thrift the experiment cost, avoids the test tube to drop.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the test tube clamp closing structure of the present invention;

FIG. 3 is an enlarged view of the test tube holder of the present invention;

FIG. 4 is a schematic diagram of a moving structure of the magnetic block of the present invention.

In the figure: 1. a test tube clamp; 2. a closed box; 3. an air cavity; 4. a limiting hole; 5. a movable rod; 6. a first dielectric plate; 7. a first positive plate; 8. a first negative plate; 9. a first voltage dependent resistor; 10. a slider; 11. a second dielectric plate; 12. a negative plate II; 13. a second voltage dependent resistor; 14. a second positive plate; 15. a first magnetic block; 16. a connecting spring; 17. an electromagnet I; 18. an electromagnet II; 19. a movable spring; 20. a second magnetic block; 21. an electromagnetic valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a clamping device for preventing a test tube from loosening comprises two test tube clamps 1, a sealing box 2 and a gas cavity 3, wherein the internal structures of the left test tube clamp 1 and the right test tube clamp 1 are completely the same, the sealing box 2 is positioned inside the test tube clamp 1, when clamping the test tube, the test tube clamp 1 moves towards two sides, a limiting hole 4 is formed inside the test tube clamp 1, a movable rod 5 is inserted into the limiting hole 4, a dielectric plate I6 is fixedly installed inside the movable rod 5, a positive plate I7 is fixedly installed inside the test tube clamp 1, the size and shape of the positive plate I7 is the same as that of the negative plate I8, the positive plate I7 and the negative plate I8 are symmetrically distributed about the dielectric plate I6, when the dielectric plate I6 moves, the relative area between the positive plate I7 and the negative plate I8 increases, the negative plate I8 is fixedly installed inside the test tube clamp 1, the inside fixed mounting of test-tube clamp 1 has piezo-resistor 9, and piezo-resistor 9 and negative plate 8 electric connection, and when the electric current between positive plate 7 and negative plate 8 is greater than the minimum path voltage of piezo-resistor 9, piezo-resistor 9 passageway.

The second piezoresistor 13 is electrically connected with the second negative plate 12, the current between the second positive plate 14 and the second negative plate 12 is greater than the minimum access voltage of the second piezoresistor 13, the second piezoresistor 13 is connected with a passage, the inside of the closed box 2 is movably connected with the slider 10, the second dielectric plate 11 is fixedly installed inside the slider 10, the second negative plate 12 is fixedly installed inside the test tube clamp 1, the second piezoresistor 13 is fixedly installed inside the test tube clamp 1, the second positive plate 14 and the second negative plate 12 are symmetrically distributed about the second dielectric plate 11, the length of the second positive plate 14 is smaller than that of the second dielectric plate 11, the relative area between the second positive plate 14 and the second negative plate 12 is increased when the second dielectric plate 11 moves, and the first magnetic block 15 is movably connected inside the air cavity 3.

When the piezoresistor I9 is in a passage, the electromagnet I17 is electrified and attracted to the electromagnet I15, the inner side of the magnet I15 is movably connected with a connecting spring 16, the outer side of the connecting spring 16 is movably connected with the electromagnet I17, the outer side of the test tube clamp 1 is movably connected with an electromagnet II 18, the right side of the electromagnet II 18 is movably connected with a movable spring 19, the right side of the movable spring 19 is movably connected with a magnet II 20, the opposite surfaces of the magnet II 20 and the electromagnet II 18 are opposite in polarity, the electromagnet II 18 is electrically connected with a piezoresistor II 13, when the piezoresistor II 13 is in the passage, the electromagnet II 18 and the magnet II 20 are attracted, so that the test tube clamp 1 tightly closes the test tube again, the bottom of the closed box 2 is movably connected with an electromagnetic valve 21, and the electromagnetic valve 21 is a timing one-way control valve, and the electromagnetic valve 21 is electrically connected with the first piezoresistor 9, and when the first piezoresistor 9 is in a passage, the electromagnetic valve 21 is opened to evacuate the gas in the closed box 2.

The working principle is as follows: the test tube clamp comprises two test tube clamps 1, the internal structures of the left test tube clamp 1 and the right test tube clamp 1 are completely the same, the closed box 2 is positioned inside the test tube clamp 1, when a test tube is clamped, the test tube clamp 1 moves towards two sides and is fixed through a middle groove, a limiting hole 4 is formed inside the groove, a movable rod 5 is inserted into the limiting hole 4, the test tube extrudes the movable rod 5, a dielectric plate I6 is fixedly connected inside the movable rod 5, the dielectric plate I6 moves outwards, the relative area between a positive plate I7 and a negative plate I8 is increased, the piezoresistor I9 is electrically connected with the negative plate I8, when the current between the positive plate I7 and the negative plate I8 is greater than the minimum path voltage of the piezoresistor I9, the piezoresistor I9 is connected with the electromagnetic valve 21, and the electromagnetic valve I17 is electrically connected with the piezoresistor I9, when the piezoresistor I9 is in a passage, the electromagnet I17 is electrified and attracted with the magnetic block I15, the gas in the closed box 2 is evacuated, the inside of the closed box 2 is in a vacuum state, the slide block 10 is movably connected in the closed box 2, when looseness occurs between the test tube and the test tube clamp 1, external air can enter the closed box 2 from the limiting hole 4, the vacuum environment in the closed box 2 disappears at the moment, the slide block 10 is pushed to move outwards, the dielectric plate II 11 is fixedly connected in the slide block 10, the relative area between the positive plate II 14 and the negative plate II 12 is increased, the current between the positive plate II 14 and the negative plate II 12 is larger than the minimum passage voltage of the piezoresistor II 13, the polarities of the opposite surfaces of the magnetic block II 20 and the electromagnet II 18 are opposite, the electromagnet II 18 is electrically connected with the piezoresistor II 13, when the passage of the piezoresistor II 13 is in a passage, the electromagnet II 18 is attracted with the magnetic block II 20, make test tube clamp 1 tightly bind once more to the test tube, prevent that the test tube from dropping and appearing the damage or inside dangerous reagent causes the injury to operating personnel.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a prevent tight device of fastening that test tube is not hard up, includes test tube clamp (1), seal box (2) and air cavity (3), its characterized in that: the test tube comprises a test tube holder (1), wherein a limiting hole (4) is formed in the test tube holder (1), a movable rod (5) is inserted into the limiting hole (4), a dielectric plate I (6) is fixedly arranged in the movable rod (5), a positive plate I (7) is fixedly arranged in the test tube holder (1), a negative plate I (8) is fixedly arranged in the test tube holder (1), a piezoresistor I (9) is fixedly arranged in the test tube holder (1), a slider (10) is movably connected in the closed box (2), a dielectric plate II (11) is fixedly arranged in the slider (10), a negative plate II (12) is fixedly arranged in the test tube holder (1), a piezoresistor II (13) is fixedly arranged in the test tube holder (1), and a positive plate II (14) is fixedly arranged in the test tube holder (1), the inside swing joint of air cavity (3) has magnetic block one (15), the inboard swing joint of magnetic block one (15) has connecting spring (16), the outside swing joint of connecting spring (16) has electro-magnet one (17), the outside swing joint of test tube clamp (1) has electro-magnet two (18), the right side swing joint of electro-magnet two (18) has floating spring (19), the right side swing joint of floating spring (19) has magnetic block two (20), the bottom swing joint of seal box (2) has solenoid valve (21).

2. The tightening device for preventing the test tube from loosening of claim 1, wherein: the test tube clamp is characterized in that the number of the test tube clamps (1) is two, the inner structures of the left side test tube clamp (1) and the right side test tube clamp (1) are completely the same, and the closed box (2) is located inside the test tube clamps (1).

3. The tightening device for preventing the test tube from loosening of claim 1, wherein: the size and shape of the first positive plate (7) and the size and shape of the first negative plate (8) are the same, and the first positive plate (7) and the first negative plate (8) are symmetrically distributed around the first dielectric plate (6).

4. The tightening device for preventing the test tube from loosening of claim 1, wherein: the first piezoresistor (9) is electrically connected with the first negative plate (8), and the second piezoresistor (13) is electrically connected with the second negative plate (12).

5. The tightening device for preventing the test tube from loosening of claim 1, wherein: the positive plate II (14) and the negative plate II (12) are symmetrically distributed around the dielectric plate II (11), and the length of the positive plate II (14) is smaller than that of the dielectric plate II (11).

6. The tightening device for preventing the test tube from loosening of claim 1, wherein: the electromagnetic valve (21) is a timing one-way control valve, and the electromagnetic valve (21) is electrically connected with the first piezoresistor (9).

7. The tightening device for preventing the test tube from loosening of claim 1, wherein: the opposite surfaces of the first magnetic block (15) and the first electromagnet (17) are opposite in polarity, and the first electromagnet (17) is electrically connected with the first piezoresistor (9).

8. The tightening device for preventing the test tube from loosening of claim 1, wherein: the opposite surfaces of the second magnetic block (20) and the second electromagnet (18) are opposite in polarity, and the second electromagnet (18) is electrically connected with the second piezoresistor (13).