CN106694470A - Blackboard eraser dust remover - Google Patents

Abstract

The invention discloses a dust remover for a blackboard. Dust-absorbing liquid is stored in a sealed box. A water outlet is provided at the bottom of the box. There is a water injection port, the box body is provided with an absorption chamber for placing a blackboard eraser, the top of the absorption chamber is open and a cover is provided, the blackboard eraser is placed in a suction groove in the absorption chamber, and a groove is provided at the bottom of the suction groove Bottom hole, the bottom of the absorption chamber is provided with a through hole and the through hole is connected to one of the ports of the tee through a pipeline with a check valve in the absorption chamber, the other port of the tee is connected to the gas cylinder through a pipeline, and the rest of the tee One port extends into the dust-absorbing liquid through a pipeline with a one-way valve for the exhaust pipe. The ash remover of the present invention can remove the ash attached to the blackboard eraser conveniently and quickly without causing environmental pollution and harm to human health. damage, and simple structure, low manufacturing cost, easy to popularize.

Description

blackboard eraser

technical field

The invention relates to teaching office equipment, in particular to a technology for erasing dust from a blackboard with a dust-absorbing function.

Background technique

At present, blackboard writing teaching is still the main way of classroom teaching, which requires frequent use of the blackboard to wipe the blackboard. In the process of wiping the blackboard with the blackboard, the chalk dust attached to the blackboard eraser accumulates more and more. If it is not removed, not only the blackboard cannot be wiped clean, but also the dust will fly during the blackboard wiping process, which is easily inhaled into the lungs by the human body, affecting human health. Therefore need often to remove the chalk dust attached to the blackboard eraser.

The traditional blackboard eraser dust removal method is to slap the blackboard eraser on an object, which inevitably raises bursts of dust, which not only pollutes the environment but is also easily inhaled by the human body through the mouth and nose, causing harm to the human body.

Contents of the invention

The technical problem to be solved by the present invention is to realize a dust removal device that can conveniently and quickly remove the dust attached to the blackboard eraser without causing environmental pollution and harm to human health.

In order to achieve the above object, the technical solution adopted in the present invention is: a blackboard erasing device, a dust-absorbing liquid is stored in a sealed box, a water outlet is provided at the bottom of the box, and a water outlet valve is provided on the water outlet. The side or top of the box body is provided with a water injection port, and the box body is provided with an absorption chamber for placing a blackboard eraser. The top of the absorption chamber is open and provided with a cover. The bottom of the suction tank is provided with a bottom hole, the bottom of the absorption chamber is provided with a through hole, and the through hole is connected to one port of the tee through a pipeline with a check valve in the absorption chamber, and the other port of the tee is connected to the other port of the tee through a pipeline. The gas cylinder, the remaining port of the tee extends into the dust-absorbing liquid through a pipe with a one-way valve for the exhaust pipe. The one-way valve in the absorption chamber only allows the gas to flow from the absorption chamber to the three-way. The exhaust pipe The one-way valve only allows gas to flow from the tee to the tank.

The cover is provided with a pressing rod, a return spring is arranged between the pressing rod and the cover, and the end of the pressing rod extending into the absorption chamber is provided with a clapping plate for clapping the blackboard eraser.

A guide column is vertically fixed in the absorption chamber, the suction groove is fixed on the guide column, and a supporting spring is arranged between the suction groove and the bottom surface of the absorption chamber.

The outer wall of the suction groove fits in a gap with the inner wall of the absorption chamber, and the inner wall of the suction groove is provided with a ring of sealing strips supporting the blackboard eraser.

The bottom surface of the absorption chamber is a downwardly recessed funnel structure, the through hole is located at the center of the funnel structure, the guide post is fixed around the through hole, and air holes are provided on the side of the guide post.

The bottom surface of the box body is in a funnel structure sunken downwards, and the box body is a transparent box body.

The air cylinder is vertically fixed on the top of the box body, the outlet/suction hole of the air cylinder is downward and is provided with a pipeline extending vertically downward, the bottom end of the pipeline is provided with a storage cavity, and the side of the storage cavity is communicated with through the pipeline Three-way, the bottom surface of the storage chamber extends into the dust suction liquid through a vertically downward pipe provided with a dust discharge check valve, and the dust discharge check valve only allows the gas to flow from the storage chamber to the box.

The ash remover of the present invention can conveniently and quickly remove the ash attached to the blackboard eraser without causing environmental pollution and harm to human health, and has simple structure, low manufacturing cost and easy popularization.

Description of drawings

The following is a brief description of the content expressed in each drawing in the description of the present invention and the marks in the figure:

Fig. 1 is the structural representation of blackboard eraser;

Figure 2 is a partially enlarged schematic diagram of the absorption chamber in Figure 1;

The marks in the above figures are: 1. Box body; 2. Inflator; 3. Piston rod; 4. Pressure rod; 5. Cover; 6. Water injection port; 7. Water outlet valve; 8. Water outlet; 9. Outrigger ;10, clear water; 11, absorption chamber; 12, one-way valve of absorption chamber; 13, one-way valve of exhaust pipe; 14, suction groove; 15, groove bottom hole; 16, air hole; 17, guide column; 19. Blackboard eraser.

detailed description

As shown in Figure 1, it is mainly composed of a box body 1, an air cylinder 2, an absorption chamber 11, a one-way valve, a water injection port 6, a water outlet port 8, and legs 9. The sealed box body 1 is supported by the legs 9, and the box body The dust-absorbing liquid is stored in the body 1, and clean water 10 can be used. The bottom of the box body 1 is provided with a water outlet 8, which is used to discharge the liquid that is dissolved with chalk dust inside. The bottom surface of the box body 1 is preferably a downwardly sunken funnel structure, so that The chalk dust is discharged in a concentrated manner, and the water outlet 8 is provided with a water outlet valve 7, which can control the timing of discharging liquid with chalk dust dissolved in it. The box body 1 is a transparent box body 1, so that it is convenient to observe whether there is too much chalk dust dissolved in the liquid, which is convenient and timely For cleaning, the side or top of the box body 1 is provided with a water injection port 6, which is convenient for injecting dust-absorbing liquid.

The box body 1 is provided with an absorption chamber 11 for placing a blackboard eraser 19. The blackboard eraser 19 is placed in the suction groove 14 in the absorption chamber 11. The evenly distributed groove bottom holes 15 at the bottom of the suction groove 14 help to evenly distribute the negative pressure. At the bottom of the blackboard eraser 19, to improve the efficiency of absorbing chalk dust, the bottom of the absorption chamber 11 is provided with a through hole, and the chalk dust falling into the absorption chamber 11 by the suction groove 14 can be discharged from the through hole, and the top of the absorption chamber 11 is open and provided with The lid 5 has an opening for putting in the blackboard eraser 19, and the lid 5 is used for sealing to ensure that the absorption chamber 11 is a relatively airtight space.

Lid 5 is provided with depression bar 4, is provided with return spring between depression bar 4 and cover 5, and depression bar 4 stretches into absorption chamber 11 and one end is provided with and is used to beat blackboard eraser 19 clapping plate, blackboard eraser is like this When 19 is put into the suction groove 14, you can utilize the pressing bar 4 to make the clapping board hit the blackboard eraser 19, so that the chalk dust accumulated on the blackboard eraser 19 falls into the bottom of the absorption chamber 11 as much as possible.

In order to improve the deashing effect of the clapping plate, a guide post 17 is vertically fixed in the absorption chamber 11. The guide post 17 is composed of two hollow cylindrical bodies nested in each other. One column is fixed on the bottom of the absorption chamber 11, and the other column is The body is fixed on the bottom surface of the suction groove 14, and a support spring is provided between the suction groove 14 and the bottom surface of the absorption chamber 11. The support spring is preferably placed in the guide column 17, so that the suction groove 14 can vibrate with the beating plate. In addition, the suction groove The outer wall of 14 cooperates with the inner wall of the absorption chamber 11. The inner wall of the suction groove 14 is provided with a sealing strip 18 supporting the blackboard eraser 19, so as to prevent chalk dust from entering the upper part of the absorption chamber 11 during vibration, and ensure that the dust will not scatter when the lid 5 is opened. Condition.

There is a tee in the box body 1, and one interface of the tee is connected to the through hole in the absorption chamber 11 through a pipeline with an absorption chamber check valve 12, and one interface extends into the through hole through a pipeline with an exhaust pipe check valve 13. In the dust-absorbing liquid, the last interface is connected to the gas cylinder 2 through a pipeline, in which the one-way valve 12 of the absorption chamber only allows the gas to flow from the absorption chamber 11 to the three-way, and the one-way valve 13 of the exhaust pipe only allows the gas to flow from the three-way to the box 1 circulation.

In order to improve the dust-absorbing effect of the absorption chamber 11, the bottom surface of the absorption chamber 11 is a downwardly recessed funnel structure, which can ensure that as much chalk dust as possible can be discharged from the through hole. The through hole is located in the center of the funnel structure, and the guide column 17 surrounds the through hole Fixed, so the side of the guide post 17 is provided with many air holes 16 to ensure that dust can enter the guide post 17 from the air holes 16.

Due to excessive dust accumulation, it will affect the service life of the piston rod 3 of the gas cylinder 2. Therefore, a storage chamber with three specific interfaces is provided in the box body 1. The storage cavity is preferably a spherical structure, and the gas cylinder 2 is vertically fixed on the top of the box body 1. , the outlet/suction hole 16 of the gas cylinder 2 is downward, the interface on the top of the storage chamber is connected to the outlet/suction hole 16 of the gas cylinder 2 through a vertically upwardly extending pipeline, and the storage chamber is connected to the tee through a laterally extending pipeline (that is, the gas cylinder 2 Connect the tee with a pipeline with a storage cavity), and extend into the dust-absorbing liquid through a pipeline extending vertically downwards, wherein the pipeline extending vertically downwards from the storage cavity is provided with a dust discharge one-way valve, and the dust discharge one-way valve Only gas is allowed to flow from the storage cavity to the box body 1 . In this way, when the gas cylinder 2 is vacuuming, the storage cavity can be used as an intermediate warehouse for storing chalk dust, which can not only reduce the amount of dust entering the gas cylinder 2, but also improve the dust removal effect. The vertically arranged pipeline structure can also ensure dust The discharge is smooth, avoiding the accumulation of dust residues.

During use, during use, first open the cover 5, place the blackboard eraser 19 in the suction groove 14 of the absorption chamber 11, close the cover 5, and pull the piston rod 3 of the gas cylinder 2 to cause a vacuum environment in the cavity of the gas cylinder 2, and pass The pipeline transmits the negative air pressure in the air cylinder 2. Due to negative air pressure, the one-way valve 13 of the exhaust pipe is in a closed state, and the one-way valve 12 of the absorption chamber is in a state of passage, and the negative air pressure is transmitted to the absorption chamber 11, thereby absorbing The chalk ash attached on the blackboard eraser 19 in the chamber 11 is sucked away, and is concentrated in the air cylinder 2 cavities (accommodating cavity), after the piston rod 3 is pulled to the top by hand, and then the piston rod 3 is pushed to the bottom. During this process, high pressure is generated in the cavity of the gas cylinder 2, the one-way valve 12 of the absorption chamber is in the closed state, and the one-way valve of the exhaust port is in the open state, then all the gas in the gas cylinder 2 is passed into the clean water 10 through the conduit through the one-way valve. If want to improve deashing effect, release after available hand pats pressure bar 4 or press down bar 4, make blackboard eraser 19 in the absorption chamber 11 under the effect of spring, vibrate up and down, to strengthen deashing effect, the chalk dust absorbed , all discharged in the clear water 10, through the use of period of time, can open water outlet valve 7, by water outlet 8, sewage is discharged.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods, as long as various insubstantial improvements are adopted in the method concept and technical solutions of the present invention, or there is no improvement Directly applying the conception and technical solutions of the present invention to other occasions falls within the protection scope of the present invention.

Claims (7)

1. Blackboard eraser, characterized in that: dust suction liquid is stored in the sealed box, the bottom of the box is provided with a water outlet, the water outlet is provided with a water outlet valve, and the side or top of the box is provided There is a water injection port, the box is provided with an absorption chamber for placing a blackboard eraser, the top of the absorption chamber is open and a cover is provided, the blackboard eraser is placed in a suction groove in the absorption chamber, and a groove is provided at the bottom of the suction groove Bottom hole, the bottom of the absorption chamber is provided with a through hole and the through hole is connected to one of the ports of the tee through a pipeline with a check valve in the absorption chamber, the other port of the tee is connected to the gas cylinder through a pipeline, and the rest of the tee One port extends into the suction liquid through a pipe with an exhaust pipe check valve that only allows gas to flow from the absorption chamber to the tee The three-way flow to the box. 2. The blackboard erasing device according to claim 1, characterized in that: the cover is provided with a pressure rod, a return spring is provided between the pressure rod and the cover, and the pressure rod extends into the absorbing One end of the room is provided with a clapping board for clapping the blackboard eraser. 3. The blackboard erasing device according to claim 2, characterized in that: a guide column is vertically fixed in the absorption chamber, the suction groove is fixed on the guide column, and there is a gap between the suction groove and the bottom surface of the absorption chamber. With support spring. 4. The blackboard eraser according to claim 3, characterized in that: the outer wall of the suction groove fits in a gap with the inner wall of the absorption chamber, and the inner wall of the suction groove is provided with a ring of sealing strips supporting the blackboard eraser. 5. The blackboard erasing device according to claim 4, characterized in that: the bottom surface of the absorption chamber is a downwardly recessed funnel structure, the through hole is located at the center of the funnel structure, and the guide column surrounds the funnel structure. The hole is fixed, and the side of the guide column is provided with an air hole. 6. The blackboard eraser according to any one of claims 1-5, characterized in that: the bottom surface of the box body is in a downwardly recessed funnel structure, and the box body is a transparent box body. 7. The blackboard eraser according to claim 6, characterized in that: the air cylinder is vertically fixed on the top of the box body, the air outlet/suction hole of the air cylinder is downward and is provided with a vertically extending downward Pipe, the bottom of the pipe is provided with a storage cavity, the side of the storage cavity is connected to the tee through the pipeline, and the bottom surface of the storage cavity extends into the dust-absorbing liquid through a vertically downward pipeline provided with a dust discharge check valve, The dust discharge one-way valve only allows gas to flow from the storage cavity to the box body.