High-sealing pressure relief type alcohol lamp cap

Abstract

The utility model discloses a high-sealing pressure relief type alcohol lamp cap, which belongs to the technical field of chemical experiment supplies and comprises a lamp cap body, a pressure relief device and a sealing device, the pressure relief device is arranged on the side surface of the upper end of the lamp cap body, the sealing device is positioned at the bottom of the alcohol lamp cap and is tightly attached to the lamp cap body, and an air passage is arranged on the lamp cap body; the pressure relief device comprises a base which is in a circular truncated cone shape, and the area of the lower bottom face of the circular truncated cone is larger than that of the upper bottom face of the circular truncated cone. A central hole is formed in the base and is communicated with the air passage; the linkage rod penetrates through the central hole, and the front end of the linkage rod extends into the air passage; the spring is wound on the linkage rod in the central hole, and the rear end of the spring is positioned through a limiting block arranged on the linkage rod; a button is arranged at the rear end of the linkage rod, and a sealing rubber ring A is arranged at the front end. The high-sealing pressure relief type alcohol lamp cap provided by the utility model not only can solve the problem of negative pressure after an alcohol lamp is extinguished and avoid the problem that the alcohol lamp cap is difficult to take down, but also can ensure long-term effectiveness of alcohol in sealing.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical experiment article technical field, concretely is a alcohol lamp cap. BACKGROUND

[0002] Alcohol lamp is a kind of heating instrument with alcohol as fuel, is often used in chemical experiment, and the material of alcohol lamp cap is generally plastic or glass, and the shape is cylindrical.

[0003] The traditional use method is to cover alcohol lamp cap on alcohol lamp to extinguish flame, but alcohol lamp cap is often adsorbed on alcohol lamp and difficult to take down. To avoid this situation, alcohol lamp cap is immediately taken down after extinguishing flame, and alcohol lamp cap is covered again after alcohol lamp cap is filled with air. This not only repeats operation, increases failure rate, and is easy to cause alcohol evaporation.

[0004] The applicant finds that China patent discloses "a kind of alcohol lamp cap", and its publication number is "CN204648225U", the patent mainly by setting air inlet hole, flameout device and clamping device in lamp cap body, although alcohol lamp can be immediately extinguished, prevent alcohol lamp cap difficult to take down, but cannot guarantee sealing, and the problem of alcohol evaporation failure is not solved. For this reason, we propose a kind of high sealing pressure relief type alcohol lamp cap. SUMMARY

[0005] The utility model aims at providing a kind of high sealing pressure relief type alcohol lamp cap, not only can solve the problem of negative pressure after alcohol lamp is extinguished, avoid alcohol lamp cap difficult to take down, and also can guarantee long-term effectiveness of alcohol in sealing.

[0006] To solve the problems in the background art, the utility model provides the following technical scheme: a kind of high sealing pressure relief type alcohol lamp cap, including lamp cap body, characterized by: still include pressure relief device and sealing device, the upper end side of lamp cap body is equipped with pressure relief device, sealing device is located at the bottom of alcohol lamp cap and is tightly attached to lamp cap body, and air passage is opened on lamp cap body;The pressure relief device includes base, and the base is equipped with central hole in the inside, and is communicated with air passage;Linkage rod passes through central hole, and linkage rod front end is deeply into air passage;Spring is wound on the linkage rod in central hole, and rear end is positioned by being equipped with limiting block on linkage rod;Button is equipped at the rear end of linkage rod, and sealing rubber ring A is equipped at the front end of linkage rod, to guarantee the sealing property of air passage.

[0007] Further, the base, air passage and lamp cap body are formed by one-time casting.

[0008] Further, the base is circular truncated cone shape, and the area of lower bottom surface is larger than that of upper bottom surface, and the lower bottom surface is attached to the inner wall of lamp cap body.

[0009] Further, the sealing rubber ring A is connected and fixed with the linkage rod through the clamping groove.

[0010] Further, the sealing device is a sealing rubber ring B, and the sealing rubber ring B is provided with a connecting groove to facilitate close adhesion to the lamp cap body.

[0011] Further, the spring is an alloy steel spring with spiral lines arranged densely, and the sealing rubber ring A is closely adhered to the bottom surface of the base circular table by the elastic force.

[0012] Through the above technical scheme, the following technical effects can be achieved:

[0013] 1. The pressure relief device arranged on the upper end of the alcohol lamp cap can effectively solve the problem that the alcohol lamp cap is difficult to be taken off from the alcohol lamp body, and the press type design can reduce the frequency of the cap when the alcohol lamp is extinguished, avoid the failure operation, and improve the experimental safety.

[0014] 2. The sealing device arranged on the bottom of the alcohol lamp cap can effectively solve the problem of failure caused by alcohol evaporation. DRAWINGS

[0015] Fig. 1 It is an overall three-dimensional schematic view of the embodiment of the utility model;

[0016] Fig. 2 It is a front view of the pressure relief device in the embodiment of the utility model;

[0017] Fig. 3 It is a front view of the sealing device in the embodiment of the utility model;

[0018] In the figure: 1, lamp cap body; 2, pressure relief device; 21, center hole; 22, base; 23, spring; 24, sealing rubber ring A; 25, button; 26, linkage rod; 27, clamping groove; 28, limiting block; 3, sealing device; 31, sealing rubber ring B; 32, connecting groove; 4, air duct. DETAILED DESCRIPTION

[0019] The specific embodiments of the utility model will be further described below in combination with the drawings. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation on the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as there is no conflict.

[0020] Please refer to Figs. 1-3The application discloses a high-sealing pressure relief type alcohol lamp cap which comprises a cap body 1, a pressure relief device 2 and a sealing device 3, the upper side of the cap body 1 is provided with the pressure relief device 2, the sealing device 3 is tightly attached to the bottom of the alcohol lamp cap and the cap body 1, and a gas passage 4 is formed in the middle of the upper end of the cap body 1; the pressure relief device 2 comprises a base 22, the inside of the base 22 is provided with a central hole 21 which is communicated with the gas passage 4; a linkage rod 26 penetrates through the central hole 21, the front end of the linkage rod 26 is deeply inserted into the gas passage 4; a spring 23 is wound on the linkage rod 26 in the central hole 21, and the rear end of the spring 23 is positioned by a limiting block 28 arranged on the linkage rod 26; a button 25 is arranged at the rear end of the linkage rod 26, and a sealing rubber ring A 24 is arranged at the front end of the linkage rod 26 so as to ensure the sealing property of the gas passage 4; the sealing rubber ring A 24 is a perfluoroether sealing rubber ring.

[0021] The base 22, the gas passage 4 and the cap body 1 are integrally formed by one-time casting.

[0022] The base 22 is in the shape of a circular truncated cone, the lower bottom surface of the circular truncated cone is larger than the upper bottom surface, and the lower bottom surface is attached to the inner wall of the cap body 1, so that the service life of the pressure relief device is prolonged.

[0023] The sealing rubber ring A 24 is connected and fixed to the linkage rod 26 through a clamping groove 27.

[0024] The sealing device 3 is a sealing rubber ring B 31, a connecting groove 32 is arranged on the sealing rubber ring B 31 so as to be tightly attached to the cap body 1, and the sealing rubber ring B 31 is a polytetrafluoroethylene sealing rubber ring.

[0025] The spring 23 is an alloy steel spring with a spiral line arrangement which is dense, so that the mechanical fatigue strength is improved, and the sealing rubber ring A 24 is tightly attached to the upper bottom surface of the base circular truncated cone by the elastic force.

[0026] The cap body 1 is made of high-temperature-resistant high-boron-silicon material.

[0027] The button 25 is a press type, and compared with a rotary knob type, the button is more convenient to operate and is not easy to be damaged.

[0028] In specific use, the alcohol lamp cap is used to cover the alcohol lamp so as to extinguish the flame, so that the internal air pressure of the alcohol lamp cap is less than the external air pressure, at this moment, the external air is introduced into the gas passage 4 through the central hole 21 by pressing the button 25, so that the internal and external air pressures of the alcohol lamp are consistent, the alcohol lamp cap is not adsorbed on the cap body 1 of the alcohol lamp, and the alcohol lamp cap does not need to be taken down again, so that the problem that the alcohol lamp cap is difficult to take down and the problem that the alcohol lamp is overturned due to the mistaken operation when the cap is taken down are solved.

[0029] The sealing rubber ring B 31 arranged at the bottom of the alcohol lamp cap is high-temperature-resistant, has good sealing property and is resistant to organic solvents, so that the sealing property of alcohol is ensured, the alcohol is not volatilized at all, and the service life of the alcohol is prolonged.

[0030] The embodiments of the present application are described in detail in conjunction with the accompanying drawings, but the present application is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and spirits of the present application, and still fall within the protection scope of the present application.

Claims

1. A high seal pressure relief alcohol lamp cap, comprising a cap body (1), characterized in that: The lamp cap body (1) is provided with a pressure relief device (2) on the upper end side, and a sealing device (3) is tightly attached to the bottom of the alcohol lamp cap and the lamp cap body (1), and a gas passage (4) is formed on the lamp cap body (1); the pressure relief device (2) comprises a base (22), the inside of the base (22) is provided with a central hole (21) which is in communication with the gas passage (4); a linkage rod (26) passes through the central hole (21), and the front end of the linkage rod (26) extends into the gas passage (4); a spring (23) is wound around the linkage rod (26) in the central hole, and the rear end is positioned by a limiting block (28) arranged on the linkage rod (26); a button (25) is arranged at the rear end of the linkage rod (26), and a sealing rubber ring A (24) is arranged at the front end of the linkage rod (26) to ensure the sealing property of the gas passage (4).

2. The high seal pressure relief alcohol lamp cap according to claim 1, wherein: The base (22), the gas passage (4) and the lamp cap body (1) are formed by one-time casting.

3. The high seal pressure relief alcohol lamp cap of claim 2, wherein: The base (22) is in the shape of a circular truncated cone, the lower bottom surface of the circular truncated cone is larger than the upper bottom surface, and the lower bottom surface is attached to the inner wall of the lamp cap body (1).

4. The high seal pressure relief alcohol lamp cap of claim 3, wherein: The sealing rubber ring A (24) and the linkage rod (26) are connected and fixed by a clamping groove (27).

5. The high seal pressure relief alcohol lamp cap of claim 4, wherein: The sealing device (3) is a sealing rubber ring B (31), and a connecting groove (32) is arranged on the sealing rubber ring B (31) to facilitate the tight attachment to the lamp cap body (1).

6. The high seal pressure relief alcohol lamp cap of claim 3, wherein: The spring (23) is a spiral-wound alloy steel spring with high density, and the spring is used to tightly attach the sealing rubber ring A (24) to the upper bottom surface of the base.

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