U-shaped pipe for balancing air pressure

Abstract

The utility model relates to a U-shaped tube for balancing air pressure, which aims to solve the technical problem of potential safety hazards caused by unbalanced pressure at present, and comprises a U-shaped test tube and a pressure balancing branch tube, a U-shaped test tube; wherein tube openings at two ends of the U-shaped test tube are respectively connected with a rubber plug in an inserted manner, and an electrode is connected into a through hole formed in each rubber plug in a penetrating manner and is inserted into the U-shaped test tube; the pressure balance branch pipe is fixedly arranged in the middle of the U-shaped test tube; wherein the pressure balance branch pipe is communicated with an inner cavity of the U-shaped test tube, the direction of the pressure balance branch pipe is consistent with that of a tube opening of the U-shaped test tube, and the pressure balance device has the advantages that the pressure balance branch pipe is communicated with the atmospheric environment, and pressure balance can be kept in the gas generation and storage process in the experiment process.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical teaching experiment technical field especially, a kind of U-tube for balancing gas pressure. BACKGROUND

[0002] In current ordinary high school chemistry teaching, the working principle of hydrogen-oxygen fuel cell and its experimental phenomenon are always the emphasis and difficulty of teaching. The traditional teaching instrument usually uses ordinary U-tube, and the discharge process of hydrogen-oxygen fuel cell is demonstrated by inserting graphite electrode into it to prepare hydrogen and oxygen by electrolysis of water, and then current meter (or light-emitting diode, music box, etc.) is used to display.

[0003] Gas is stored by using rubber plug to block the pipe opening. The design of ordinary U-tube lacks gas pressure balancing instrument. When gas is continuously generated and accumulated on both sides of the pipe opening, the instrument will be broken and the experimental liquid will leak along the gap between the pipe opening and the rubber plug due to the unbalanced pressure, which has safety hazards.

[0004] In view of this, we propose a U-tube for balancing gas pressure. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the shortcomings of the prior art, adapting to the actual needs, and providing a U-tube for balancing gas pressure to solve the technical problem of safety hazards caused by unbalanced pressure.

[0006] In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows: a U-tube for balancing gas pressure is designed, which comprises a U-shaped test tube and a pressure balance branch pipe.

[0007] U-shaped test tube;

[0008] Among them, the two ends of the U-shaped test tube are respectively inserted with rubber plugs, the electrodes are inserted into the U-shaped test tube, and the electrodes are inserted into the U-shaped test tube.

[0009] The pressure balance branch pipe is fixedly arranged in the middle of the U-shaped test tube.

[0010] Among them, the pressure balance branch pipe is communicated with the inner cavity of the U-shaped test tube, and the direction of the pressure balance branch pipe is consistent with the direction of the pipe opening of the U-shaped test tube.

[0011] Preferably, the rubber plug insertion end is designed as a circular truncated cone.

[0012] Preferably, the two outer walls of the pipe opening end of the U-shaped test tube are respectively fixedly provided with exhaust branch pipes.

[0013] Among them, the exhaust branch pipe gas outlet end can be sleeved with a balloon.

[0014] Preferably, the air outlet end of the exhaust branch pipe is arranged with a clamping structure;

[0015] The clamping structure comprises a half-clamp and a connecting plate;

[0016] The two half-clamps are abutted and clamped on the air outlet end of the exhaust branch pipe;

[0017] The two connecting plates are respectively fixed on one end of the two half-clamps;

[0018] Wherein, a torsion spring is arranged between the two connecting plates.

[0019] Preferably, an annular groove is formed on the outer wall of the air outlet end of the exhaust branch pipe, and the two half-clamps are abutted and clamped in the annular groove.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] 1. The utility model discloses a U-shaped test tube and a pressure balance branch pipe, which are connected with the atmosphere, can keep pressure balance during gas generation and storage, and solve the problems of instrument rupture and experimental liquid leakage along the gap between the pipe opening and the rubber plug.

[0022] 2. The utility model discloses an exhaust branch pipe, which is connected with a balloon, realizes effective storage of hydrogen and oxygen, directly displays the gas generation process, and judges the generation volume of the gas on both sides of the U-shaped test tube by observing and comparing the inflation degree of the balloon.

[0023] 3. The utility model discloses a half-clamp, a connecting plate, a torsion spring and an annular groove, which further fix the balloon connected with the exhaust branch pipe and facilitate the removal of the balloon. DRAWINGS

[0024] Fig. 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Fig. 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0026] Fig. 3 It is a schematic diagram of the clamping structure connection of the utility model;

[0027] Fig. 4 It is a schematic diagram of the rubber plug structure of the utility model;

[0028] In the drawing: 1, U-shaped test tube; 2, pressure balance branch pipe; 3, rubber plug; 4, electrode; 5, exhaust branch pipe; 6, clamping structure;

[0029] 301, perforation;

[0030] 501, annular groove;

[0031] 601, half clasp; 602, connecting plate; 603, torsion spring. DETAILED DESCRIPTION

[0032] The utility model is further illustrated below in combination with the drawings and examples:

[0033] Example 1: a U-shaped tube for balancing gas pressure, referring to Figs. 1 to 4 , comprising a U-shaped test tube 1 and a pressure balance branch pipe 2;

[0034] The U-shaped test tube 1; wherein the two end openings of the U-shaped test tube 1 are respectively plugged with rubber plugs 3, the electrodes 4 are inserted into the U-shaped test tube 1, the pressure balance branch pipe 2 is fixedly arranged in the middle of the U-shaped test tube 1; wherein the pressure balance branch pipe 2 is in communication with the inner cavity of the U-shaped test tube 1, and the pressure balance branch pipe 2 is oriented in the same direction as the opening of the U-shaped test tube 1.

[0035] The utility model discloses a U-shaped test tube 1 and a pressure balance branch pipe 2, which are in communication with the atmospheric environment, can maintain pressure balance during gas generation and storage during the experiment, and solve the problems of instrument rupture and experimental liquid leakage along the gap between the opening and the plug due to unbalanced pressure, and have the advantages of safety hazards.

[0036] Specifically, the plug-in end of the rubber plug 3 is designed as a circular truncated cone, which facilitates the insertion of the rubber plug 3 into the opening of the U-shaped test tube 1.

[0037] Further, the two outer walls of the opening end of the U-shaped test tube 1 are respectively fixedly provided with exhaust branch pipes 5; wherein the exhaust end of the exhaust branch pipe 5 can be sleeved with a balloon.

[0038] The utility model discloses an exhaust branch pipe 5, which is connected with a balloon, realizes effective storage of hydrogen and oxygen, directly displays the gas generation process, and can directly judge the generation volume of the gas on both sides of the U-shaped test tube 1 by observing and comparing the inflation degree of the balloon, thereby enhancing the visibility of the experiment.

[0039] Further, the exhaust end of the exhaust branch pipe 5 is provided with a clamping structure 6;

[0040] The clamping structure 6 comprises half clamping rings 601 and connecting plates 602; the two half clamping rings 601 are butted and clamped on the gas outlet end of the exhaust branch pipe 5; the two connecting plates 602 are fixed on one end of the two half clamping rings 601 respectively; wherein a torsion spring 603 is arranged between the two connecting plates 602, and the elastic coefficient of the torsion spring 603 is selected by the person skilled in the art according to the actual situation; an annular groove 501 is formed on the outer wall of the gas outlet end of the exhaust branch pipe 5, and the two half clamping rings 601 are butted and clamped in cooperation with the annular groove 501.

[0041] The utility model discloses a half clamping ring 601, connecting plate 602, torsion spring 603 and annular groove 501 are set up, have the advantage that further fix the balloon connected at the exhaust branch pipe 5, and the balloon is convenient to take down.

[0042] Working principle: during the experiment, the balloon is fixed on the exhaust branch pipe 5, then the two connecting plates 602 are pressed relatively, the torsion spring 603 is compressed, the two half clamping rings 601 are opened, the two half clamping rings 601 are sleeved on the annular groove 501 of the exhaust branch pipe 5, the connecting plate 602 is loosened, under the action of the torsion spring 603, the two half clamping rings 601 are closed and clamped in the annular groove 501, and the balloon port is positioned on the exhaust branch pipe 5. 1mol / sodium sulfate solution is filled in the U-shaped test tube 1, and 2-3 drops of phenolphthalein solution are dropped on both side tube openings, the electrode 4 is inserted into the rubber plug 3 at the tube opening of the U-shaped test tube 1, and the direct current power supply of 3-6V is connected to carry out electrolysis, along with the advancement of the experiment, since the rubber plug 3 blocks the tube opening of the U-shaped test tube 1, the hydrogen and oxygen generated in the experimental process can be stored in the balloon, the two balloons on both sides can be clearly observed to gradually swell, and the swelling degrees of the two balloons on both sides are inconsistent. At the same time, it can be observed that the liquid level of the pressure balance branch pipe 2 is consistent with the liquid level height of the U-shaped test tube 1 on both sides, and the existence of the pressure balance branch pipe 2 balances the atmospheric pressure. After electrolysis for a period of time, the direct current power supply is disconnected, and the electrode 4 is connected to the ammeter, and the discharge process of the hydrogen-oxygen fuel cell can be directly displayed through the deflection of the ammeter pointer.

[0043] The utility model discloses a preferable embodiment, but is not limited to this, and the person skilled in the art can easily understand the spirit of the utility model according to the above embodiment and make different inferences and changes, but as long as not departing from the spirit of the utility model, it is within the protection scope of the utility model.

Claims

1. A U-shaped tube for balancing gas pressure, characterized in that, Include: U-shaped test tube (1); Wherein, the two ends of the U-shaped test tube (1) are respectively inserted with rubber plugs (3), and the through holes (301) opened on the rubber plugs (3) are respectively inserted with electrodes (4), and the electrodes (4) are inserted into the U-shaped test tube (1); Pressure balance branch pipe (2) is fixedly arranged in the middle of the U-shaped test tube (1); Wherein, the pressure balance branch pipe (2) is communicated with the inner cavity of the U-shaped test tube (1), and the pressure balance branch pipe (2) is arranged in the same direction as the U-shaped test tube (1).

2. A U-shaped tube for balancing air pressure as claimed in claim 1, characterized in that The inserted end of the rubber plug (3) is designed as a circular truncated cone.

3. A U-shaped tube for balancing air pressure as claimed in claim 1, characterized in that, The outer walls of the two ends of the U-shaped test tube (1) are respectively fixedly provided with exhaust branch pipes (5); Wherein, the exhaust end of the exhaust branch pipe (5) can be sleeved with a balloon.

4. A U-shaped tube for balancing gas pressure as claimed in claim 3, characterized in that The exhaust end of the exhaust branch pipe (5) is provided with a clamping structure (6); The clamping structure (6) comprises: Two half clamps (601) are abutted and clamped on the exhaust end of the exhaust branch pipe (5); Two connecting plates (602) are respectively fixedly arranged on one end of the two half clamps (601); Wherein, the two connecting plates (602) are arranged with a torsion spring (603).

5. A U-shaped tube for balancing gas pressure as claimed in claim 4, characterized in that The outer wall of the exhaust end of the exhaust branch pipe (5) is provided with an annular groove (501), and the two half clamps (601) are abutted and clamped with the annular groove (501).

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