Automatic pressure relief safety valve for unpowered balloon

Abstract

The utility model relates to the technical field of high-altitude pressure relief valves, and discloses an unpowered balloon automatic pressure relief safety valve which comprises a valve body and a valve element shaft arranged in an inner cavity of the valve body in a sliding mode, a pressure sensing film box is fixedly arranged between the upper portion of the valve body and the valve element shaft in a sealed mode, and an exhaust hole is formed in the valve body. A pressure relief hole is formed in the valve element shaft, an exhaust channel communicated with the pressure relief hole is formed in the valve element shaft in the central axis direction, when the end, away from the valve body, of the valve element shaft is pressed, the pressure sensitive film box is compressed, and the pressure relief hole is communicated with the exhaust hole to relieve pressure in the balloon through the exhaust channel. According to the utility model, after the pressure in the ball is increased, the pressure is automatically released, and after the pressure in the ball is released to the safe pressure, the pressure is automatically stopped, so that the safety of the product is effectively protected.

Description

Technical Field

[0001] The utility model relates to the technical field of high-altitude pressure relief valves, in particular to a power-free balloon automatic pressure relief safety valve. Background Art

[0002] In daily life, it can be seen that large hydrogen balloons are launched into the air or banners are hung during some celebration activities to enhance the festival atmosphere. However, since the balloon is sealed after being filled with hydrogen or other gases at a certain pressure and the spherical material generally has no stretchability, especially outdoors in summer, after the balloon is exposed to the sun, the gas inside the balloon will expand as the temperature rises, the internal pressure increases, and there is a risk of explosion, and such explosion incidents have occurred in the past.

[0003] In the use of large balloons such as meteorological balloons, similar problems will also be encountered. For example, because meteorological balloons rise to a relatively high altitude, after being released on the ground, during the continuous rising process, the external air pressure gradually decreases, so the internal pressure of the spherical body gradually increases. To avoid the spherical body bursting due to too high internal pressure, it is necessary to relieve the pressure inside the spherical body to ensure that the internal pressure is within a safe range for normal use. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a power-free balloon automatic pressure relief safety valve, which solves the problem that existing meteorological balloons or large balloons burst during the rising process due to the decrease of external air pressure and the increase of internal pressure.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model is realized through the following technical solutions:

[0008] A power-free balloon automatic pressure relief safety valve includes a valve body and a valve core shaft slidably arranged in the inner cavity of the valve body. A pressure-sensitive membrane box is fixedly arranged between the upper part of the valve body and the valve core shaft in a sealed manner. An exhaust hole is arranged on the valve body, a pressure relief hole is arranged on the valve core shaft, and an exhaust channel communicating with the pressure relief hole is arranged along the central axis direction on the valve core shaft. When one end of the valve core shaft away from the valve body is pressed, the pressure-sensitive membrane box is compressed, and the pressure relief hole communicates with the exhaust hole through the exhaust channel to relieve the pressure inside the balloon.

[0009] Preferably, the valve body is fixedly connected to the surface of the balloon through a fastening nut, and sealing gaskets are arranged between the surface of the balloon and the valve body and the fastening nut respectively to ensure the sealing performance of the connection.

[0010] Preferably, a filter cotton is arranged in a squeezing manner between the inner cavity of the fastening nut and the lower end surface of the valve body.

[0011] Preferably, sealing rings are symmetrically arranged on both sides of the inner cavity of the valve body at the exhaust holes, and the sealing rings are embedded in the valve body and are in interference fit with the valve core shaft.

[0012] Preferably, the inner cavity of the pressure-sensitive diaphragm box communicates with the exhaust passage through a constant-pressure ventilation hole, and the constant-pressure ventilation hole is arranged through the valve core shaft.

[0013] Preferably, an annular exhaust groove is formed on the inner wall of the valve body outside the exhaust hole.

[0014] (III) Beneficial effects

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

[0016] For the non-powered balloon automatic pressure relief safety valve, through the arranged pressure-sensitive diaphragm box, when the balloon rises or is heated (such as exposed to the sun), and the internal pressure rises and exceeds the working pressure range, the pressure-sensitive diaphragm box is compressed due to the increase in the internal pressure of the balloon, resulting in the communication between the pressure relief hole of the valve core shaft and the exhaust hole. At this time, the exhaust passage exhausts and relieves the pressure inside the balloon. When the internal pressure of the balloon returns to the rated pressure range, due to the decrease in the internal pressure of the balloon, the pressure-sensitive diaphragm box returns to its original position by its own elastic force, automatically closing the valve body again to keep the balloon within the rated pressure range and ensure the safety of the balloon. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic cross-sectional structure diagram of the present utility model in the A-A direction;

[0019] Figure 3 is a schematic diagram of the installation structure of the present utility model and the balloon;

[0020] Figure 4 is a schematic diagram of the pressure relief state structure of the present utility model.

[0021] In the figure: 1, valve body; 2, fastening nut; 3, filter cotton; 4, gasket; 5, exhaust hole; 6, sealing ring; 7, valve core shaft; 8, pressure-sensitive diaphragm box; 9, pressure relief hole; 10, constant-pressure ventilation hole; 11, exhaust passage. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figure 1 , the present utility model provides a technical solution: a non-powered balloon automatic pressure relief safety valve, including a valve body 1 and a valve core shaft 7 slidably disposed in the inner cavity of the valve body 1. A pressure-sensitive diaphragm box 8 is hermetically fixed between the upper part of the valve body 1 and the valve core shaft 7. An exhaust hole 5 is provided on the valve body 1, a pressure relief hole 9 is provided on the valve core shaft 7, and an exhaust passage 11 communicating with the pressure relief hole 9 is arranged along the central axis direction on the valve core shaft 7. When one end of the valve core shaft 7 away from the valve body 1 is pressed, the pressure-sensitive diaphragm box 8 is compressed, and the pressure relief hole 9 communicates with the exhaust hole 5 through the exhaust passage 11 to relieve the pressure inside the balloon.

[0024] In the present utility model, through the provided pressure-sensitive diaphragm box 8, when the pressure inside the balloon increases due to elevation or heat (such as exposure to the sun) and exceeds the working pressure range, the pressure-sensitive diaphragm box 8 is compressed due to the increase in the internal pressure of the balloon, causing the pressure relief hole 9 of the valve core shaft 7 to communicate with the exhaust hole 5. At this time, the exhaust passage 11 exhausts and relieves the pressure inside the balloon. When the internal pressure of the balloon returns to the rated pressure range, due to the decrease in the internal pressure of the balloon, the pressure-sensitive diaphragm box 8 returns the valve core shaft 7 to its original position by its own elastic force, automatically closing the valve body 1 again to keep the balloon within the rated pressure range and ensure the safety of the balloon.

[0025] Referring to FIG. 3, in this embodiment, the valve body 1 is fixedly connected to the outer wall of the balloon through a fastening nut 2. Sealing gaskets 4 are provided between the outer wall of the balloon and the valve body 1 and the fastening nut 2 to ensure the sealing performance of the connection. Through the provided fastening nut 2, the safety valve can be quickly installed and fixed to the balloon, and at the same time, due to the arranged sealing gaskets 4, the sealing performance after the installation of the safety valve can be effectively ensured.

[0026] Referring to Figure 2 shown, in this embodiment, a filter cotton 3 is squeezed between the inner cavity of the fastening nut 2 and the lower end surface of the valve body 1. The filter cotton 3 provided at the lower part of the valve body 1 can prevent dust from entering the inside of the valve body 1 and avoid affecting the sealing performance between the valve body 1 and the valve core shaft 7.

[0027] Referring to Figure 2 and 3As shown, in this embodiment, sealing rings 6 are symmetrically arranged on both sides of the exhaust hole 5 in the inner cavity of the valve body 1. The sealing rings 6 are embedded in the valve body 1 and are in interference fit with the valve core shaft 7. By providing the sealing rings 6, the sealing performance between the valve core shaft 7 and the inner cavity of the valve body 1 can be effectively ensured, and the service life of the entire balloon under normal conditions can be effectively guaranteed.

[0028] Refer to Figure 4 As shown, in this embodiment, the inner cavity of the pressure-sensitive diaphragm box 8 is communicated with the exhaust passage 11 through the constant-pressure ventilation hole 10, and the constant-pressure ventilation hole 10 is arranged through the valve core shaft 7. By adding the constant-pressure ventilation hole 10 on the valve core shaft 7, the advantage is that the air pressure inside the pressure-sensitive diaphragm box 8 is always kept consistent with the external atmospheric pressure, avoiding the diaphragm box being in a closed space state, enabling the diaphragm box to better sense the internal pressure change of the balloon when being compressed by the external pressure, and allowing for more precise pressure adjustment. If there is no constant-pressure ventilation hole 10, the inside of the diaphragm box is in a closed state. When the diaphragm box is pressed, it not only has to overcome the elastic force of the diaphragm box itself but also the pressure of the air compression inside the diaphragm box, resulting in insensitive pressure sensing.

[0029] Refer to Figure 2 As shown, in this embodiment, an annular exhaust groove is provided on the inner cavity wall of the valve body 1 outside the exhaust hole 5. By providing the annular exhaust groove, it is convenient to quickly discharge gas and quickly relieve the pressure inside the balloon.

[0030] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic pressure relief safety valve for an unpowered balloon, comprising a valve body and a valve core shaft slidably arranged in an inner cavity of the valve body, characterized in that: A pressure-sensitive membrane box is sealed and fixed between the upper part of the valve body and the valve core shaft, the valve body is provided with an exhaust hole, the valve core shaft is provided with a pressure relief hole, and the valve core shaft is provided with an exhaust channel connected with the pressure relief hole along the central axis direction. When the end of the valve core shaft away from the valve body is pressurized, the pressure-sensitive membrane box is compressed, and the pressure relief hole is connected with the exhaust hole to relieve the pressure inside the balloon through the exhaust channel.

2. The automatic pressure relief safety valve for an unpowered balloon according to claim 1, characterized in that: The valve body is fixedly connected to the surface wall of the balloon through a fastening nut, and sealing gaskets are arranged between the surface wall of the balloon and the valve body and the fastening nut to ensure the sealing of the connection.

3. The automatic pressure relief safety valve for an unpowered balloon according to claim 2, characterized in that: Filter cotton is squeezed and arranged between the inner cavity of the fastening nut and the lower end surface of the valve body.

4. The automatic pressure relief safety valve for an unpowered balloon according to claim 1, characterized in that: The inner cavity of the valve body is symmetrically provided with sealing rings on both sides of the exhaust hole. The sealing rings are embedded in the valve body and have an interference fit with the valve core shaft.

5. An automatic pressure relief safety valve for an unpowered balloon according to any one of claims 1 to 4, characterized in that: The inner cavity of the pressure-sensitive membrane box is communicated with the exhaust channel through a constant-pressure vent hole, and the constant-pressure vent hole is arranged through the valve core shaft.

6. The automatic pressure relief safety valve for an unpowered balloon according to claim 5, characterized in that: An annular exhaust groove is provided on the inner cavity wall of the valve body and outside the exhaust hole.

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