WO2011023085A1

WO2011023085A1 - Automatic inflation and constant pressure device for elastic container

Info

Publication number: WO2011023085A1
Application number: PCT/CN2010/076236
Authority: WO
Inventors: 王晓光
Original assignee: Wang Xiaoguang
Priority date: 2009-08-31
Filing date: 2010-08-23
Publication date: 2011-03-03
Also published as: CN101644250A

Abstract

An automatic inflation and constant pressure device for an elastic container (1) comprises the elastic container (1) and a two-stage air pump that consists of a small air pump (2) and a large air pump (3) connected serially. The two-stage air pump is installed in the elastic container (1). The working cross-sectional area of the small air pump (2) is smaller than the working cross-sectional area of the large air pump (3). When in operation, the two pumps operate simultaneously or alternately, so that air with specified pressure is filled into the elastic container (1) till a constant pressure is achieved. The adjustment of pressure from opening one-way valves (4, 5, 6) can control the final air pressure.

Description

[Name of invention made by ISA according to Rule 37.2] Automatic inflation constant pressure device for elastic containers

Technical field

The present invention relates to an automatic inflation and constant pressure technique, and more particularly to a technique for automatically charging and constant pressure mounted in an elastic container.

Background technique

At present, there are many types of known elastic containers, such as various pneumatic tires, various inflatable balls, swimming rings, elastic air bags, piston structures, and all other compressible rebound containers. For convenience of description, hereinafter referred to as an elastic container. Common inflation methods are: inflator, electric air pump, mouth blowing. Regarding the technique of achieving automatic inflation and constant pressure by a built-in device, there is a prior art disclosure for a tire. The analysis found that the disclosed technology has three things in common: 1. placed inside the tire; 2. uses a single-stage air pump structure; 3. achieves inflation by self-deformation during tire rotation. It has been found through research that in the actual working process, the above-mentioned technology using a single-stage air pump is difficult or impossible to generate the rated air pressure required for the tire due to the limited deformation of the air pump. Because the single-stage air pump inhales the normal atmospheric pressure, when the tire is deformed, the deformation compression of the air pump is also small, the compression ratio of the air pump is very low, the air pressure in the air pump is much smaller than the tire air pressure, so the inflation cannot be continued, and the tire cannot be reached. Rated air pressure. In addition, the more commonly used is the built-in connecting rod piston type, which pushes the connecting rod to achieve inflation by striking the connecting rod or through an external cam and a crankshaft, which is often easy to damage the tire and the inflatable device itself. Others use an external piston cylinder structure that is driven by a cam or crankshaft. So far, no practical products related to the technology have been seen on the market.

technical problem

The invention overcomes the disadvantages of the prior art that the structure is complicated, the cost is high, the installation is cumbersome, the wear is easy, and the principle defects are caused. The invention has many advantages, such as: high pressure gas generation, simple structure, low cost, easy realization, low wear resistance, integral processing with the inflated structure, automatic inflation and constant pressure by self-deformation, and the like. Those skilled in the art will be able to appreciate additional benefits or other objects of the claimed invention as defined in the claims after reading the specification.

Technical solution

The technical solution adopted by the present invention to solve the technical problem thereof is that one embodiment of the present invention comprises a two-stage air pump and an elastic container composed of two air pumps in series. The secondary air pump is installed inside the elastic container, and the secondary air pump is a series structure directly or indirectly compressed by the same pressure. Both ends of the secondary air pump compression direction are respectively installed at opposite ends of the elastic container in the pressure transmission direction, and the small air pump intake air The end is connected to the atmosphere through a one-way valve, and the outlet end of the small air pump is connected to the intake end of the atmospheric pump through a one-way valve, and the outlet end of the atmospheric pump is connected to the inner space of the elastic container through a one-way valve, and the elastic container passes through repeated deformation and deformation. The built-in secondary air pump is compressed to inflate, and the working cross-sectional area of the small air pump is smaller than the working cross-sectional area of the atmospheric pump.

One embodiment of the present invention adopts the following structure to realize the function of high pressure inflation and constant pressure:

1. The small air pump is an extremely compact pressure-resistant structure in the internal space. When it is compressed to the limit, the internal residual volume is very small, so as to ensure the air pump stroke energy caused by the deformation of the elastic container under the action of the rated air pressure and pressure F. The air pressure is not lower than the rated air pressure to achieve the function of generating a high compression ratio gas through a short stroke. In the embodiment the remaining volume is generally less than 10% of the working volume of the air pump. According to the pressure formula: P=F/S, the force area S1 of the small air pump is designed according to less than F/P, F is the repeated pressure value, and P is the rated pressure of the elastic container, so that as long as the pressure F≥P*S1, then It can meet the rated air pressure requirements of elastic containers, and in practical applications, F is much larger than P*S1, for example in pneumatic tires.

2. The two-stage air pump series structure is adopted, and the atmospheric pump can realize the function of storing high-pressure gas, inflating the elastic container and controlling the charging or stopping of the small air pump. The final inflation pressure can be adjusted by adjusting the opening pressure of the output check valve of the atmospheric pump.

For ease of understanding, the working process can be approximated as follows: a small air pump inflates the atmospheric pump and an atmospheric pump inflates the elastic container. When the air is inflated to a certain moment, the atmospheric pump is full, the small air pump cannot be deployed, and the atmospheric pump continues to inflate the elastic container under pressure, and then the small air pump is deployed to continue to inflate the atmospheric pump until the atmospheric pump generates insufficient air pressure under pressure to open the one-way. The valve no longer inflates the flexible container. The atmospheric pump is in full condition, and the small air pump can no longer be deployed and stops inflating. While the actual work process is much more complicated, the secondary air pumps work either simultaneously or separately.

The structure and working principle of the embodiment will be explained below with reference to FIG. 2:

First define the working parameters: 1. P0 is atmospheric pressure, P1 is the air pressure of the small air pump, P2 is the air pressure of the atmospheric pump, P3 is the air pressure of the elastic container; 2. The opening air pressure of the check valve (4) (5) (6) respectively For Pb1, Pb2, Pb3, the opening air pressure of the check valve is adjustable. In this embodiment, the Pb1 and Pb2 opening air pressures are extremely small, which can be neglected in the calculation; 3. In the pressure direction, the small air pump working cross-sectional area is S1, which is large. The working section area of the air pump is S2, S1 < S2; 4. The pressure F is repeatedly applied. The following equality expressions all use approximations.

Assume that it starts to work in the natural expansion state of the elastic container, P1=P0, P2=P1, P3=P2, the following works:

1. When the elastic container is subjected to the pressure F, it is compressed, and when the elastic container has a small air pressure, a large stroke compression can be produced. Because the force area S1 < S2, P1> P2, the small air pump inflates the atmospheric pump, and when P2>P3+Pb3, the atmospheric pump inflates the elastic container. When the inflation reaches equilibrium, P3+Pb3=P2, P2=P1, P3>P0, and the check valve (4)(5)(6) is closed.

2. When the pressure F is withdrawn, the shape of the elastic container becomes restored. At this time, since the gas of the atmospheric pump is pressed into the elastic container, the atmospheric pump recovers a small amount of deformation so that P2 = P3, but remains Compressed state; since the gas of the small air pump is pressed into the atmospheric pump, the small air pump will be deployed when the elastic container recovers under the pressure of P3, and when P1 < P0, the check valve (4) is opened, and the small air pump draws in air. When equilibrium is reached, P1 = P0. P2>P1, P3=P2, check valves 4, 5, and 6 are closed.

3.

Cycle

1, 2 process. After each inflation, the atmospheric pump expands, and after the pressure is removed, the volume of the small air pump to resume expansion will be slightly smaller than the last time. Until the atmospheric pump is fully expanded, the small air pump is compressed to the limit. At this time, the pressure F acts directly on the atmospheric pump through the hard pump of the small air pump, and the atmospheric pump is compressed to continue to inflate the elastic container. After the loss of force, the atmospheric pump becomes smaller due to the discharge of air, and the small air pump is again released to a certain extent.

4.

Cycle

1, 2, and 3 processes. As the pressure of P3 rises, the pressure F can only cause slight deformation of the elastic container. At this time, the gas of the small air pump is completely pressed into the atmospheric pump, the atmospheric pump expands to the limit, and the slight deformation directly acts on the atmospheric pump. If the pressure P2 ≤ P3 + Pb3 at this time, the check valve (6) cannot be opened, the elastic container can no longer be inflated. When the pressure is withdrawn, the elastic container and the atmospheric pump recover at the same time, and the small air pump is no longer opened. At this time, P3 reaches the rated pressure. Under the repeated action of the pressure F, since the small air pump cannot be deployed, the process of inflation can no longer be achieved, thereby achieving the purpose of constant pressure.

5. After the inflation process, the elastic container continues to produce a slight deformation under pressure F, but does not continue to inflate. This allowable deformation range can be set by adjusting the opening pressure Pb3 of the check valve (6). The slight deformation of the elastic container at the rated air pressure P3 and pressure F, the pressure increment of P2 in this deformation range is used to set the opening pressure Pb3 of the check valve (6).

6. When the air pressure in the flexible container P3<P2-Pb3 due to chronic air leakage or slight air leakage or exhausting, etc., under the pressure F, the atmospheric pump again inflates the elastic container, and after the pressure is removed, the elastic container recovers deformation, large The air pump has been compressed, and the small air pump opens to inhale and re-enters the 1, 2, 3, and 4 process cycles until it stops at the rated air pressure.

7. The magnitude of the pressure F is a function of the inflation pressure in the elastic container. In the application of the pneumatic tire, as the load increases, the inflation pressure of the tire automatically increases accordingly, allowing the tire to work at a most suitable air pressure. , just in line with the actual application needs of tires.

8. The inflation parameters can also be adjusted by adjusting the opening air pressure of Pb1 and Pb2. A variety of methods for adjusting the gas pressure can be produced by experimentation.

9. The process described above is a process that is briefly described for ease of understanding, and is not an actual detailed workflow, and the present invention is not limited by the explanation of the embodiments.

While the invention has been described with respect to the preferred embodiments of the invention, it is understood that the invention On the contrary, the invention is intended to cover various modifications and equivalents. In addition, while the various elements of the disclosed invention are shown in various combinations and configurations, this is merely illustrative, and other combinations and configurations, including more, less or a single element, are also within the scope of the invention. Inside.

Beneficial effect

1. The structure is very simple, the performance is reliable, the cost is low, and it is easy to implement. 2. A fully automatic controlled inflation process. 3. Constant constant pressure can be maintained under repeated pressure. 4. Automatically increase the air pressure as the pressure increases and maintain a new air pressure. 5, can be combined with the actual application as a whole, produced as a part, further reducing costs. 6, no wear parts. 7, installed inside the product, light weight, does not affect the appearance and performance of the product. 8, can still be inflated by traditional methods.

DRAWINGS

The invention will be further described below in conjunction with the drawings of the embodiments. The drawings are not to scale in a true scale, and thus the invention is not limited to the structures, shapes and proportions in the drawings. The examples are for illustrative purposes only and do not represent the invention.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional structural view showing an embodiment of the present invention.

Figure 2 is a schematic diagram of the operation of one embodiment of the present invention.

Figure 3 is an embodiment of the present invention in a sports ball.

In Figure 1: 1. elastic container; 2. small air pump; 3. atmospheric pump; 4. check valve; 5. check valve; 6. check valve;

In Figure 2: P0. Atmospheric pressure; P1. Small air pump pressure; P2. Atmospheric pump pressure; P3. Elastic container pressure; Pb1, Pb2, Pb3 The opening pressures of the three check valves are respectively indicated.

In Figure 3: 8. intake hose; 9. communication hose; 10. valve.

BEST MODE FOR CARRYING OUT THE INVENTION

Two embodiments of the present invention are described below with reference to the accompanying drawings:

1. General Embodiment: Referring to Figure 1 and Figure 2, the small air pump is an extremely compact pressure-resistant structure in the internal space. A compact bellows air pump or a piston air pump can be used. When the bellows air pump is used, the maximum outer diameter of the bellows can be used. The reinforcing ribs (7) are added to prevent the bellows from being compressed and deformed in the lateral direction by the P3. The ribs can be made of metal or plastic. The top of the small air pump is mounted on the upper side of the elastic container and is open to the atmosphere through the check valve 1. The bottom of the small air pump is connected to the hard surface of the top of the atmospheric pump, and the check valve (5) is connected to the two air pumps in the middle. The atmospheric pump can adopt a bellows air pump, and the atmospheric pump communicates with the elastic container through the one-way valve (6), and the bottom surface of the atmospheric pump is installed on the lower side of the elastic container. The check valve (4) (5) is a low open air pressure valve, and the check valve (6) is an adjustable open air pressure valve. The opening pressure of the check valve (6) is determined experimentally to achieve the requirement that the charged gas meet the rated air pressure. Preferably, the two air pumps may be made of polypropylene or a rubber material, and the mounting may be by an adhesive bonding method or a vulcanization bonding method.

Second, the application of the ball embodiment: Referring to Figure 3, due to the characteristics of the sports ball, the symmetry is required, so the two air bags of the same shape of the atmospheric pump are symmetrically mounted on the inner wall of the ball. The small air pump is placed between the two large air bags. The large airbag is connected through the hose to ensure the same air pressure in the two large airbags, and the large airbag communicates with the elastic container through the one-way valve (6). The small air pump is connected to the valve of the ball through the air inlet hose, and the air filter can be installed on the valve to avoid dust when inhaling. The other structure is the same as in the first embodiment. The working principle is the same as that in the first embodiment.

Embodiments of the invention

Same as the best implementation.

Industrial applicability

The invention is applicable to inflatable elastic containers, such as various pneumatic tires, various inflatable balls, swimming rings, elastic air bags, piston structures, and all other compressible rebound containers.

Sequence table free content

Claims

The utility model relates to an automatic inflation and constant pressure technology, which is characterized in that: a two-stage air pump consisting of two air pumps in series, the two-stage air pump is installed inside the elastic container, the working cross-sectional area of the small air pump is smaller than the working cross-sectional area of the atmospheric pump, and the secondary air pump is A series structure directly or indirectly compressed by the same pressure, two ends of the secondary air pump compression direction are respectively installed at opposite ends of the elastic container pressure transmission direction, and the small air pump inlet end is connected to the atmosphere through a one-way valve, and the small air pump outlet end passes The one-way valve is connected to the inlet end of the atmospheric pump, and the outlet end of the atmospheric pump is connected to the inner space of the elastic container through the one-way valve, and the elastic container is self-inflating by compressing the built-in secondary air pump when repeatedly deformed by deformation, in the pressure direction The working cross-sectional area of the small air pump is smaller than the working cross-sectional area of the atmospheric pump, and the secondary air pump and the elastic container constitute three inflatable spaces in series.
The automatic inflation constant pressure technology according to claim 1, wherein said small air pump is an extremely compact pressure-resistant structure in an internal space, and when compressed to a limit, the internal residual volume is very small to ensure a rated air pressure. Under the action of external pressure, the deformation of the elastic container can generate a gas pressure not lower than the rated air pressure in the stroke of the air pump, so as to realize the function of generating a high compression ratio gas through a short stroke; the atmospheric pump can realize the storage high pressure. Gas, inflating the elastic container and controlling the function of filling and stopping the small air pump; the two-stage air pump can be combined in series with a single air pump of various structures, shapes and materials.
The automatic inflation constant pressure technology according to claim 1, wherein the inflation constant pressure is set by setting an opening pressure of said one-way valve, said one-way valve being adjustable or fixed A variety of structures, shapes and materials can be used.
The automatic inflation constant pressure technology according to claim 1, wherein the elastic container has many types, for example, various pneumatic tires, various inflatable balls, swimming rings, elastic air bags, and piston structures. Class, and all other containers that can be compressed and rebounded.