Patent Application
20100236648
The present invention mainly relates to a filling machine for highly compressed gas, specialized in highly compression of gas and consequent filling of the gas into a high pressure gas tank, to be used by common consumers or in various specialized fields, so as to match the need of extra high pressure gas tanks present in the current market which are made of composite material and have a large capacity.
The present invention provides a filling machine for highly compressed gas, the compressing operation of which is mainly produced by cooperative operation of a set of high-compression mechanisms and a set of eccentric driving mechanisms; the set of high-compression mechanisms used in the present invention comprises at least two oscillating type compression gas cylinders of different sizes, and the set of the eccentric driving mechanisms comprises at least two eccentric driving wheels which are fixedly mounted on a driving shaft in sequence, spaced apart by an angle of 120°; when the driving shaft rotates clockwise slowly, the driving shaft immediately drives the at least two eccentric driving wheels mounted thereon to rotate simultaneously, and each eccentric driving wheel immediately drives an associated integral block of a slip ring, a piston rod and a piston to reciprocate linearly with respect to an associated gas cylinder barrel so that each associated oscillating type compression gas cylinder performs its gas compressing operation.
The present invention uses a set of high-compression mechanisms which comprises at least two oscillating type compression gas cylinders of different sizes, and also uses cooperatively with a set of eccentric driving mechanisms, as a basis of the compressing operation technology according to the present invention. An operation technology using eccentric driving wheels to perform a gas compressing operation is early disclosed by U.S. Pat. No. 2,105,765 (inventor: Fourness); and an operation technology using at least two oscillating type compression gas cylinders of different sizes to perform a gas compressing operation is also disclosed in detail by U.S. Pat. No. 2,628,015 (inventor: Neugebauer et al) long before.
In recent years and at present, there are a number of published or announced patent documents which provide similar gas compressing devices based on the technologies of using eccentric driving wheels and using a plurality of compression gas cylinders, or a number of such products which have been sold in the market; however, gas compressing or filling devices or machines provided to common consumers or various specialized fields in the market at present for simple and convenient use still cannot meet common requirements, two defects of which are as follows: firstly, the output gas pressure cannot meet the high requirements at present, and thus they can only fill conventional gas tanks, but generally cannot meet or match the needs of containment of more highly compressed gas in high pressure gas tanks made of composite materials in present advanced science and technology; secondly, even if at present there are similar high pressure gas compressing or filling devices or machines which are able to match the use of high pressure gas tank in the market, most of the devices or machines have a too slow filling speed.
The near term published or announced patent documents, which refer to technologies using a plurality of compression gas cylinders of different sizes or using eccentric driving wheels to provide the above discussed similar or same kind of gas compressing devices or machines, are as follows: Chinese Patent Application Publication No. CN1828119A (inventor: ZHENG Zhen Bang), Chinese Paten Application Publication No. CN101070833A (inventor: ZHENG Zhen Bang), or Chinese Patent Announcement No. CN2761870Y.
The above mentioned Chinese Patent Announcement No. CN2761870Y refers to using a plurality of compression gas cylinders of different sizes in order to compress natural gas, characterized in that, it can meet the needs of large gas displacement and belongs to a large-scale compression structure, which is not very suitable to be used by common consumers or in various specialized fields for simple and convenient use; therefore, as compared with the filling machine for highly compressed gas according to the present invention, the above mentioned Chinese Patent Announcement No. CN2761870Y should not be considered as the same kind of products needed by common consumers.
According to the above mentioned Chinese Patent Application Publication No. CN101070833A, its compressing operation uses an eccentric driving wheel to drive three compression gas cylinders of different sizes, and according to the above mentioned Chinese Patent Application Publication No. CN1828119A, its compressing operation uses at least two eccentric driving wheels to drive at least two compression gas cylinders of different sizes in sequence; as compared with the filling machine for highly compressed gas provided by the present invention, the outstanding design of the present invention is that the fulcrums of the pistons as well as the fulcrums of the eccentric driving wheels are located in a same plane and the fulcrums of both of them are also in the plane, while according to the relative designs disclosed by Chinese Patent Application Publication No. CN101070833A and Chinese Paten Application Publication No. CN1828119A, the pistons are in a same plane, but the fulcrums of the pistons and the fulcrums of the eccentric driving wheels are located in different planes so as to produce a leverage effect, which produces an unnecessary oscillation affecting the steady operation of the structure; when compared in terms of power and speed, the filling machine for highly compressed gas according to the present invention has advantages that it highly increases the filling pressure, and highly increases the speed for filling gas into a high pressure gas tank, so that it highly reduces the time for filling a high pressure gas tank.
Due to fast development of science and technology in composite materials, high pressure gas tanks made of composite materials, which combine high-strength materials such as carbon fiber, glass fiber, high-strength aluminum alloy or titanium alloy, have been used widely in a plurality of fields. The pressure in the high pressure gas tanks is 50˜100% higher than that in conventional gas tanks, and the weight of the high pressure gas tanks is more than 50% lighter than that of conventional gas tanks. Therefore, it is necessary to improve the gas compressing technology and gas filling technology, in order to match the need of the extra high pressure gas tanks present in the current markets which are made of composite material and have a large capacity.
In view of the defects in the performances of the prior high pressure gas tanks and gas filling machines, through careful and in-depth research and sufficient testing and verification, the present invention now, by applying an innovative technology and a suitable design combination, provides a new generation of filling machines for highly compressed gas; the filling machine for highly compressed gas provided by the present invention has a driving shaft rotation speed up to 75 rpm, which reaches an output gas pressure up to 3000 psi via a third stage of compression gas cylinder; taking a gas tank of the same pressure model (model: M6-2000 psi) as a reference, the same kind of products provided in the market have a gas filling speed of 40 minutes to 110 minutes, while the filling machine for highly compressed gas according to the present invention has a gas filling speed of only 30 minutes.
The high-compression technology provided by the present invention enables gas to be filled into a high pressure gas tank in simple manner after being highly compressed, so as to match and meet the needs of extra high pressure gas tanks made of composite materials in current market which have a large gas capacity; the gas filling machine for highly compressed gas according to the present invention enables the gas filling speed to be highly increased so that the gas filling time is highly reduced; therefore, by means of the simple and efficient high-compression technology provided by the present invention, common consumers or persons in various specialized fields can easily store and carry a larger volume of gas, which is filled into a high pressure gas tank after being highly compressed, for various applications.
An object of the present invention is to provide a filling machine for highly compressed gas which is a gas compressing machine using a high pressure while not using lubricant, whose function is to fill various highly compressed clean dry gas, such as oxygen, medical oxygen, nitrogen, argon, air, carbon dioxide, into an extra high pressure gas tank; the technical advantage of the present invention also lies in that it allows achievement of a filling pressure which is much higher than that generally provided in the current market, and therefore, the present invention can match and satisfy the need of an extra high pressure gas tank made of composite material available in the current market, which has a large capacity, and at the same time highly increases the speed for filling gas into a high pressure gas tank so that it substantially reduces the time for filling gas into a high pressure gas tank; therefore, by means of the simple and efficient high-compression technology provided by the present invention, common consumers or persons in various specialized fields can easily store and carry a larger volume of gas, which is stored into a high pressure gas tank after being highly compressed, for various applications.
A filling machine for highly compressed gas provided by the present invention mainly comprises: at least two oscillating type compression gas cylinders which are connected in series by a plurality of one-way valves and hoses so as to constitute a high-compression mechanism; a driving shaft; a plurality of eccentric driving wheels which are fixedly mounted on the driving shaft in sequence spaced apart by a selected angle so as to constitute a eccentric driving mechanism; an electric driver; a mechanical reduction gearbox which is connected to the electric driver; a supporting shaft which is fixedly mounted in a solid upright framework, wherein the driving shaft extending from the reduction gearbox is supported by the two side walls of the framework; the heads of the at least two oscillating type compression gas cylinders is fitted over one supporting shaft; a piston, a piston rod and a slip ring are fixedly joined into an integral block, wherein the slip ring is fitted over the eccentric driving wheel and the eccentric driving wheel is rotatable with respect to the slip ring; when the electric driver is powered, the electric driver rotates and drives the reduction gearbox to reduce the rotation speed according to a reduction ratio and transfer the rotation movement to the driving shaft so that the driving shaft rotates at a low speed and a large torque; when the driving shaft rotates at a low speed, the center of the eccentric driving wheel rotates clockwise along a circular trace, and the movement trace of the center of the eccentric driving wheel is centered on the driving shaft; when the center of the eccentric driving wheel performs a circular movement, the eccentric driving wheel immediately drives the integral block of the slip ring, the piston rod and the piston to reciprocate linearly with respect to the gas cylinder barrel; the electric driver, the reduction gearbox, the eccentric driving wheel and the driving shaft jointly compose an eccentric driving mechanism which operates to drive at least two oscillating type compression gas cylinders to perform a gas compressing operation successively; the cylinder bores of the at least two compression gas cylinders decrease stage by stage in sequence, wherein the cylinder bore of the first stage compression gas cylinder is the largest, the cylinder bore of the second stage compression gas cylinder is relatively smaller and the cylinder bore of the third or higher stage compression gas cylinder is seven smaller in sequence, and the cylinder bore of the highest stage compression gas cylinder is the smallest.
The high-compression technology of the filling machine for highly compressed gas provided by the present invention has a process as follows:
The head of the first stage compression gas cylinder is fitted over the supporting shaft and the other end of the compression gas cylinder is connected to the piston and the piston rod, with the other end of the piston rod being fixedly joined to the slip ring so as to be fitted over the eccentric driving wheel together; when the electric driver is powered, the power drives the driving shaft via the reduction gearbox to rotate clockwise slowly, and subsequently drives the eccentric driving wheel secured on the driving shaft to rotate simultaneously, wherein the movement trace of the center of the eccentric driving wheel is centered on the driving shaft; when the center of the eccentric driving wheel performs a circular movement, the eccentric driving wheel immediately drives the integral block of the slip ring, the piston rod and the piston to reciprocate linearly with respect to the gas cylinder barrel, and simultaneously drives the gas cylinder barrel, the piston, the piston rod and the slip ring to oscillate back and forth in a left-and-right direction by a certain angle in a plane together, taking the supporting shaft as a center. A cylinder manifold mounted on the top of the upright frame is provided with an inlet for introducing low pressure gas and when the piston and the piston rod move away from the head of the gas cylinder barrel towards the other end, the low pressure gas is drawn into the chamber inside the first stage compression gas cylinder via the inlet through a hose and an one-way valve; in this manner, the piston and the piston rod move towards the head of the gas cylinder barrel, compresses the gas in the chamber, and the gas, after being compressed by the first stage compression gas cylinder, enters into the chamber of the second stage compression gas cylinder; then the second stage gas compressing stroke begins and the gas, after being compressed by the second stage compression gas cylinder, enters into the chamber of the third stage compression gas cylinder so as to undergo the third stage gas compressing stroke; after being compressed in two or more stages, the gas reaches a preset value of pressure so as to be output via a preset outlet, for being filled into an extra high pressure gas tank. The filling machine for highly compressed gas according to the present invention is provided with a cooling fan, and the outer circumferential portions of the plurality of oscillating type compression gas cylinders in the present invention are provided with bump-and-depression textures for heat elimination, wherein the cooling fan directly blows onto the at least two oscillating type compression gas cylinders arranged side by side so that the compression gas cylinders can be maintained at a suitably low temperature, and a water cooling type heat elimination means can also be used to maintain the compression gas cylinders at a suitably low temperature; the solid upright framework used in the present invention is provided with a rigid transparent cover which operates to avoid or mitigate any possible damage caused to the operating components inside the framework by external impacts, wherein the rigid transparent cover is made of an infrangible rigid transparent film which is made of polycarbonate, or made of a toughened infrangible glass; the operation of the gas compressing mechanism can be clearly seen from outside through the rigid transparent cover, and of course, it is also possible to select covers made of other materials; the cylinder manifold mounted on the top of the upright frame is provided with a pressure switch which operates to adjust and calibrate the pressure switch to a preset value of pressure, and when the pressure of the output highly-compressed gas exceeds the preset value of pressure, the pressure switch shuts off the input power so as to stops the gas compressing operation of the filling machine for highly compressed gas and sends a prompt signal; the cylinder manifold is also provided with a pressure gauge which shows the pressure of the output highly-compressed gas, and also provided with a safety valve which discharges the highly-compressed gas when the pressure of the output highly-compressed gas exceeds the preset value of pressure to ensure safety.
The present invention illustrates a filling machine for highly compressed gas in the best mode for carrying out the invention portion of its specification, which has three oscillating type compression gas cylinders arranged in series. However, the present invention is not limited to this and can use at least two oscillating type compression gas cylinders according to practical requirements.
The principle and structure of the present invention will now be explained in detail by means of embodiments with reference to figures; however, the embodiments are only provided for illustration, but not to limit the practical extent of the present invention and the protection scope of its claims.
As shown in
As shown in the front view of
As shown in
In this manner, as discussed above, an eccentric driving mechanism consisting of the electric driver 26, the reduction gearbox 25, the driving shaft 11 and the three eccentric driving wheels 10, 17 and 21 acts on the three oscillating type compression gas cylinders 101, 102 and 103, so as to perform a gas compressing operation. The eccentric driving mechanism according to the present invention is not limited to the above embodiment. As long as the driving shaft 11 is rotated by any prime power to drive the oscillating type compression gas cylinders fixedly mounted on the driving shaft 11, it falls into the technical field of the present invention and the protection scope of the its claims.
With reference to
With reference to
With reference to
The cylinder bores of the three gas cylinders 101, 102 and 103 of different stages decrease stage by stage; the cylinder bore of the first stage compression gas cylinder 101 is the largest, the cylinder bore of the second stage compression gas cylinder 102 is the middle, and the cylinder bore of the third stage compression gas cylinder 103 is the smallest.
The dynamic process of the compressing gas operation of each compression gas cylinders is now discussed respectively (as follow):
Gas compression at the first stage (with reference to
The head of the first stage compression gas cylinder 101 is fitted over the supporting shaft 4 and the other end of the compression gas cylinder 101 is connected to one end of the piston rod 8, with the other end of the piston rod 8 being fixedly joined to the slip ring 9 so as to be fitted over one eccentric driving wheel 10 together (with reference to
When the electric driver 26 is powered, the power drives the driving shaft 11 via the reduction gearbox 25 to rotate clockwise slowly (with reference to
When the center of the eccentric driving wheel 10 performs a circular movement along the movement trace “T”, the eccentric driving wheel 10 drives the integral block of slip ring 9, the piston rod 8 and the piston 6 to reciprocate linearly with respect to the gas cylinder barrel 7 of the compression gas cylinder 101, and simultaneously drives the gas cylinder barrel 7, the piston 6, the piston rod 8 and the slip ring 9 to oscillate back and forth in a left-and-right direction by a certain angle in a plane together, taking the supporting shaft 4 as a center (with reference to
With reference to
Gas compression at the second stage (with reference to
The head of the second stage compression gas cylinder 102 is fitted over the supporting shaft 4 and the other end of the compression gas cylinder 102 is connected to one end of the piston rod 18, with the other end of the piston rod 18 fixedly joined to the slip ring 16 so as to be fitted over one eccentric driving wheel 17 together (with reference to
When the eccentric driving wheel 17 rotates, the eccentric driving wheel 17 drives the integral block of slip ring 16, the piston rod 18 and the piston 19 to reciprocate linearly with respect to the gas cylinder barrel 15 of the compression gas cylinder 102 and simultaneously drives the gas cylinder barrel 15, the piston 19, the piston rod 18 and the slip ring 16 to oscillate back and forth in a left-and-right direction by a certain angle in a plane together, taking the supporting shaft 4 as a center (with reference to
With reference to
With reference to
Gas compression at the third stage (with reference to
The head of the third stage compression gas cylinder 103 is fitted over the supporting shaft 4 and the other end of the compression gas cylinder 103 is connected to one end of the piston rod 22, with the other end of the piston rod 22 fixedly joined to the slip ring 20 so as to be fitted over one eccentric driving wheel 21 together (with reference to
When the eccentric driving wheel 21 rotates, the eccentric driving wheel 21 drives the integral block of slip ring 20, the piston rod 22 and the piston 23 to reciprocate linearly with respect to the gas cylinder barrel 24 of the compression gas cylinder 103 and simultaneously drives the gas cylinder barrel 24, the piston 23, the piston rod 22 and the slip ring 20 to oscillate back and forth in a left-and-right direction by a certain angle in a plane together, taking the supporting shaft 4 as a center (with reference to
With reference to
With reference to
With reference to
With reference to
With reference to
In the above embodiment, the filling machine for highly compressed gas 100 according to the present invention uses three oscillating type compression gas cylinders 101, 102 and 103 arranged in series; however, the present invention is not limited to this, it can use any number of, but at least two, oscillating type compression gas cylinders according to practical requirements.
| Number | Date | Country | Kind |
|---|---|---|---|
| 200910129651.X | Mar 2009 | CN | national |
