阅读说明：本技术 一种电磁集成阀 (Electromagnetic integrated valve ) 是由 王斌 胡浩迪 叶晨 许冬东 于 2021-08-27 设计创作，主要内容包括：本发明提供一种电磁集成阀,包括阀体组件、顶杆组件和电磁线圈组件,在阀体和顶杆座间形成一阀体腔；在阀体和电磁线圈间形成一铁芯腔；阀杆组件设置在所述阀体腔中,将所述阀体腔分为第一阀腔、第二阀腔和第三阀腔；靠近所述阀体组件一侧的所述铁芯腔为第四阀腔,动铁芯活动设置在所述铁芯腔中；所述电磁集成阀还包括第一通道和第二通道,所述第一通道的一气路连接所述阀体的进气口和所述第三阀腔,所述第一通道的另外一气路连接所述阀体的进气口和所述第四阀腔；所述第二通道连接所述第一阀腔和第四阀腔。本申请的电磁集成阀具有互锁保护,可靠性更高；阀体结构、通路设计紧凑,具有良好的防水防尘作用。(The invention provides an electromagnetic integrated valve, which comprises a valve body assembly, a mandril assembly and an electromagnetic coil assembly, wherein a valve body cavity is formed between the valve body and a mandril base; an iron core cavity is formed between the valve body and the electromagnetic coil; the valve rod assembly is arranged in the valve body cavity and divides the valve body cavity into a first valve cavity, a second valve cavity and a third valve cavity; the iron core cavity close to one side of the valve body assembly is a fourth valve cavity, and the movable iron core is movably arranged in the iron core cavity; the electromagnetic integrated valve also comprises a first passage and a second passage, wherein an air passage of the first passage is connected with the air inlet of the valve body and the third valve cavity, and the other air passage of the first passage is connected with the air inlet of the valve body and the fourth valve cavity; the second passage connects the first valve chamber and the fourth valve chamber. The electromagnetic integrated valve has interlocking protection and higher reliability; the valve body structure and the passage are designed compactly, and the valve body has good waterproof and dustproof functions.)

1. The electromagnetic integrated valve is characterized by comprising a valve body assembly, a mandril assembly and an electromagnetic coil assembly, wherein the mandril assembly is arranged on the valve body assembly, and a valve body cavity is formed between the valve body and a mandril base; the electromagnetic coil assembly is arranged on the valve body assembly, and an iron core cavity is formed between the valve body and the electromagnetic coil;

the valve rod assembly is arranged in the valve body cavity, the valve body cavity is divided into a first valve cavity, a second valve cavity and a third valve cavity in sequence, and the first valve cavity is a valve body cavity close to one side of the ejector rod assembly; the iron core cavity close to one side of the valve body assembly is a fourth valve cavity, and the movable iron core is movably arranged in the iron core cavity;

the electromagnetic integrated valve also comprises a first passage and a second passage, wherein an air passage of the first passage is connected with the air inlet of the valve body and the third valve cavity, and the other air passage of the first passage is connected with the air inlet of the valve body and the fourth valve cavity; the second passage connects the first valve chamber and the fourth valve chamber.

2. The solenoid integrated valve of claim 1, further comprising a third passage connecting the exhaust port of the valve body and the second valve chamber, a dust cap, and a sealing piece; the gasket sets up on the gas vent, the shield sets up the gasket outside.

3. The electromagnetic integrated valve of claim 2, wherein the poppet assembly further comprises a first seal ring, a steel sleeve, a second seal ring, and a poppet, the poppet comprising a radially projecting flange portion and a stem body; the first sealing ring and the steel sleeve are arranged in a seat hole of the ejector rod seat, after assembly, a flange part of the ejector rod is positioned in the first valve cavity, a rod body of the ejector rod is inserted into and connected with the seat hole of the ejector rod seat, the first sealing ring and the steel sleeve, and the rod body of the ejector rod protrudes out of the seat hole of the ejector rod seat; the second sealing ring is sleeved and connected with the outer surface of the ejector rod seat.

4. The electromagnetic integrated valve according to claim 3, wherein the valve body assembly comprises a first spring, the valve rod assembly comprises a valve rod, one end of the valve rod facing the third valve chamber is provided with a spring groove, one end of the first spring is arranged in the spring groove, and the other end of the first spring is connected with the chamber wall of the third valve chamber.

5. The solenoid integrated valve of claim 4, wherein the solenoid assembly further comprises a cover plate, a stationary core, a guide sleeve, a second spring, a first sealing plug, and a second sealing plug, the guide sleeve being disposed in the core cavity, the stationary core being interference disposed in the guide sleeve; the movable iron core is movably arranged in the guide sleeve; the second sealing plug is arranged at one end, facing the static iron core, of the movable iron core; the first sealing plug is arranged at the other end of the movable iron core; the outer surface of one end of the movable iron core, which faces the valve body, is provided with a spring arc part, and the second spring is arranged on the spring arc part; the cover plate is arranged on the electromagnetic coil.

6. The electromagnetic integrated valve according to claim 5, further comprising a fourth channel, wherein the cover plate is provided with a groove channel, the stationary core is provided with a middle through hole, one open end of the middle through hole is movably connected with the second sealing plug, and the other open end of the middle through hole is connected with the groove channel through a gas circuit; the electromagnetic coil is provided with a coil through hole, one end of the coil through hole is connected with the groove channel, and the other end of the coil through hole is connected with a connecting channel which is arranged on the valve body and connected with the third channel; the fourth channel is a channel which is connected with the fourth valve cavity, the middle through hole of the static iron core, the groove channel of the cover plate, the coil through hole of the electromagnetic coil and the connecting channel which is connected with the third channel on the valve body.

Technical Field

The invention relates to the technical field of pneumatic elements, in particular to an electromagnetic integrated valve which is high in reliability and has an interlocking protection function.

Background

The gas circuit control valve is widely applied to fluid control in various technical fields, and has more application occasions and various gas circuit control valves in the current market. When the working ports are switched or cut off, the conventional gas circuit control valve has no protection or interlocking function, so that when a user operates by mistake or breaks down, the working gas circuit is switched by mistake or cannot be kept in a switching state, and the normal use and the reliability of a product are influenced; after a period of use, are susceptible to failure from mechanical failure.

Therefore, the prior art solenoid integrated valve has a place to lift.

Disclosure of Invention

In view of the above-mentioned drawbacks, an object of the present invention is to provide an integrated solenoid valve with high reliability and an interlock protection function, so as to solve the problems of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

an electromagnetic integrated valve comprises a valve body assembly, a mandril assembly and an electromagnetic coil assembly, wherein the mandril assembly is arranged on the valve body assembly, and a valve body cavity is formed between the valve body and a mandril base; the electromagnetic coil assembly is arranged on the valve body assembly, and an iron core cavity is formed between the valve body and the electromagnetic coil; the valve rod assembly is arranged in the valve body cavity, the valve body cavity is divided into a first valve cavity, a second valve cavity and a third valve cavity in sequence, and the first valve cavity is a valve body cavity close to one side of the ejector rod assembly; the iron core cavity close to one side of the valve body assembly is a fourth valve cavity, and the movable iron core is movably arranged in the iron core cavity; the electromagnetic integrated valve also comprises a first passage and a second passage, wherein an air passage of the first passage is connected with the air inlet of the valve body and the third valve cavity, and the other air passage of the first passage is connected with the air inlet of the valve body and the fourth valve cavity; the second passage connects the first valve chamber and the fourth valve chamber.

According to the electromagnetic integrated valve, the electromagnetic integrated valve further comprises a third channel, a dust cover and a sealing sheet, and the third channel is connected with the exhaust port of the valve body and the second valve cavity; the gasket sets up on the gas vent, the shield sets up the gasket outside.

According to the electromagnetic integrated valve of the preferred embodiment of the application, the ejector rod assembly further comprises a first sealing ring, a steel sleeve, a second sealing ring and an ejector rod, and the ejector rod comprises a flange part protruding in the radial direction and a rod body; the first sealing ring and the steel sleeve are arranged in a seat hole of the ejector rod seat, after assembly, a flange part of the ejector rod is positioned in the first valve cavity, a rod body of the ejector rod is inserted into and connected with the seat hole of the ejector rod seat, the first sealing ring and the steel sleeve, and the rod body of the ejector rod protrudes out of the seat hole of the ejector rod seat; the second sealing ring is sleeved and connected with the outer surface of the ejector rod seat.

According to the electromagnetic integrated valve in the preferred embodiment of the present application, the valve body assembly includes a first spring, the valve rod assembly includes a valve rod, a spring slot is opened at an end of the valve rod facing the third valve chamber, an end of the first spring is disposed in the spring slot, and another end of the first spring is connected to a chamber wall of the third valve chamber.

According to the electromagnetic integrated valve of the preferred embodiment of the present application, the electromagnetic coil assembly further includes a cover plate, a stationary core, a guide sleeve, a second spring, a first sealing plug and a second sealing plug, the guide sleeve is disposed in the core cavity, and the stationary core is disposed in the guide sleeve in an interference manner; the movable iron core is movably arranged in the guide sleeve; the second sealing plug is arranged at one end, facing the static iron core, of the movable iron core; the first sealing plug is arranged at the other end of the movable iron core; the outer surface of one end of the movable iron core, which faces the valve body, is provided with a spring arc part, and the second spring is arranged on the spring arc part; the cover plate is arranged on the electromagnetic coil.

According to the electromagnetic integrated valve of the preferred embodiment of the present application, the electromagnetic integrated valve further includes a fourth channel, the cover plate is provided with a groove channel, the stationary core is provided with a middle through hole, one open end of the middle through hole is movably connected to the second sealing plug, and the other open end of the middle through hole is connected to the groove channel through a gas path; the electromagnetic coil is provided with a coil through hole, one end of the coil through hole is connected with the groove channel, and the other end of the coil through hole is connected with a connecting channel which is arranged on the valve body and connected with the third channel; the fourth channel is a channel which is connected with the fourth valve cavity, the middle through hole of the static iron core, the groove channel of the cover plate, the coil through hole of the electromagnetic coil and the connecting channel which is connected with the third channel on the valve body.

The core thought of this application lies in, makes an electromagnetism integrated valve, has interlocking protection when the working port switches operating condition, and the reliability is higher, can not cause the inefficacy because of user's maloperation or breaking down like the ejector pin jamming for control valve job stabilization, valve body structure, route design are compact moreover, have good waterproof dustproof effect, and is stronger to environment adaptability, and work is more stable, reliable, the life-span is longer.

Due to the adoption of the technical characteristics, compared with the prior art, the invention has the following advantages and positive effects:

the electromagnetic integrated valve has the advantages that the electromagnetic integrated valve has interlocking protection and higher reliability, and the effect of combining two products can be achieved by only using one valve body structure;

secondly, the valve body has compact structure and channel design, unidirectional air inlet and exhaust, good waterproof and dustproof effects and convenient installation;

thirdly, the valve body has stronger adaptability to the environment, more stable and reliable work and longer service life;

fourth, this application increases automatically controlled design, when mechanical fault appears in the product, still can satisfy the use, promotes the reliability.

Of course, it is not necessary for any particular embodiment of the inventive concept to be implemented to achieve all of the above technical effects at the same time.

Drawings

FIG. 1 is a schematic view of the present application;

FIG. 2 is a first cross-sectional view of the present application;

FIG. 3 is a second cross-sectional view of the present application;

FIG. 4 is a third cross-sectional view of the present application;

FIG. 5 is a fourth cross-sectional view of the present application;

fig. 6 is an enlarged schematic view of the solenoid assembly of fig. 4.

Detailed Description

Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, and so forth have not been described in detail so as not to unnecessarily obscure aspects of the present invention.

Referring to fig. 1 and fig. 2, an appearance schematic diagram and a first cross-sectional schematic diagram of the present application, the first cross-sectional schematic diagram is a connection cross-sectional schematic diagram of a tappet assembly and a valve body assembly, the electromagnetic integrated valve of the present application includes a valve body assembly 3, a tappet assembly 4 and an electromagnetic coil assembly 9, the tappet assembly 4 is disposed on the valve body assembly 3, the valve body assembly 3 includes a valve body 31, the tappet assembly 4 includes a tappet seat 40, a valve body cavity is formed between the valve body 31 and the tappet seat 40, in the embodiment of the present application, the tappet assembly 4 is locked on the valve body assembly 3 by a nut, in order to ensure air tightness between the tappet assembly 4 and the valve body assembly 3, a fifth sealing ring 7 is added to improve air tightness and perform water and dust prevention; the solenoid assembly 9 is disposed on the valve body assembly 3, and a core cavity is formed between the valve body 31 and the solenoid 92, in the embodiment of the present application, the solenoid assembly 9 is locked on the valve body assembly 3 by a nut.

In fig. 2, the valve rod assembly 6 is arranged in the valve body cavity, and the valve body cavity is divided into a first valve cavity 18, a second valve cavity 19 and a third valve cavity 20 in sequence, wherein the first valve cavity 18 is a valve body cavity close to one side of the mandril assembly 4; as shown in the figure, the valve stem assembly 6 includes a valve stem 60, a support ring 61, a third seal ring 62, a fourth seal ring 63 and a support ring 64, wherein the support ring 61 and the support ring 64 are respectively sleeved at two ends of the valve stem 60 for supporting the valve stem 60; the third and fourth sealing rings 62 and 63 are fitted around the valve rod 60 to divide the valve body cavity into the first valve cavity 18, the second valve cavity 19, and the third valve cavity 20. In addition, please refer to fig. 4, a third schematic sectional view of the present application, where the third schematic sectional view is a schematic sectional view of a connection between a solenoid coil assembly and a valve body assembly, in the figure, the core cavity near one side of the valve body assembly 3 is a fourth valve cavity 21, and the movable core 14 is movably disposed in the core cavity, in the embodiment of the present application, a groove is formed on the valve body 31 of the valve body assembly 3 for forming the core cavity with the solenoid coil 92, but it cannot be used to limit the present application, for example, the valve body 31 is not formed with a groove and the core cavity is formed on the solenoid coil 92, as long as the purpose of accommodation can be achieved, the protection scope of the present application should be all.

Referring to fig. 2 and 4, the integrated solenoid valve further includes a first passage a and a second passage B, a gas path of the first passage a connects the gas inlet 1 of the valve body 31 and the third valve chamber 20, in fig. 2, the third valve chamber 20 is connected to the working port 2, and when receiving a command for working, pressure gas enters from the gas inlet 1 to the third valve chamber 20 and then is delivered from the working port 2; the other gas path of the first passage a connects the gas inlet 1 of the valve body 31 and the fourth valve chamber 21, so that the gas from the gas inlet 1 is led to the third valve chamber 20 and the fourth valve chamber 21 respectively; in the embodiment of the present application, the air passage leading to the fourth valve chamber 21 is opened from the connection passage of the air inlet 1 and the third valve chamber 20; in addition, the second passage B connects the first valve chamber 18 and the fourth valve chamber 21.

Referring to fig. 3 and fig. 4, fig. 3 is a second cross-sectional view of the present application, which is also a cross-sectional view of a connection between the tappet assembly and the valve body assembly with another cross-section, the electromagnetic integrated valve further includes a third channel C, a dust cap 16 and a sealing piece 17, the third channel C connects the exhaust port 22 of the valve body 31 and the second valve cavity 19; the sealing piece 17 is arranged on the exhaust port 22, the dust cap 16 is arranged outside the sealing piece 17, and the dust cap 16 and the sealing piece 17 are used for preventing foreign matters from entering the electromagnetic integrated valve of the application through the exhaust port 22; when the working port 2 and the second valve chamber 19 are communicated, gas flows from the working port 2 to the second valve chamber 19 and is exhausted from the exhaust port 22 through the third passage C.

Referring to fig. 2, the push rod assembly 4 of the present application further includes a first sealing ring 41, a steel sleeve 42, a second sealing ring 43, and a push rod 5, wherein the push rod 5 includes a flange portion protruding radially and a rod body; as shown in the figure, the first sealing ring 41 and the steel sleeve 42 are arranged in the seat hole of the ejector rod seat 40, the first sealing ring 41 is sealed with the side wall of the seat hole of the ejector rod seat 40 so as to be isolated from the atmosphere, after assembly, the flange part of the ejector rod 5 is positioned in the first valve cavity 18, the rod body of the ejector rod 5 is inserted into and connected with the seat hole of the ejector rod seat 40, the first sealing ring 41 and the steel sleeve 42, and the rod body of the ejector rod 5 protrudes out of the seat hole of the ejector rod seat 40 for the purpose of facilitating manual operation of the ejector rod 5; the second sealing ring 43 is sleeved on and connected with the outer surface of the ejector rod seat 40, and is used for air tightness when being connected with other connecting pieces.

As shown in fig. 2, the valve body assembly 3 includes a first spring 8, one end of the valve rod 60 of the valve rod assembly 6 facing the third valve chamber 20 is provided with a spring slot, one end of the first spring 8 is disposed in the spring slot, the other end of the first spring 8 is connected to the chamber wall of the third valve chamber 20, after assembly, the first spring 8 is in a pressing state, and the first spring 8 pushes the valve rod 60 against the plunger 5, so that the valve rod 60 and the plunger 5 are in contact connection.

Referring to fig. 4, fig. 5 and fig. 6 simultaneously, fig. 5 is a fourth cross-sectional schematic view of the present application, which is a schematic sectional view of a connection between a tappet assembly and a valve body assembly at another position, where the electromagnetic coil assembly 9 further includes a cover plate 10, a stationary core 12, a guide sleeve 13, a second spring 15, a first sealing plug 142 and a second sealing plug 143, the guide sleeve 13 is disposed in the core cavity, and the stationary core 12 is disposed in the guide sleeve 13 in an interference manner so that the stationary core 12 does not move, in this embodiment, the stationary core 12 is not fully inserted into the guide sleeve 13, but a part of the stationary core 12 is in an interference connection with a cavity wall of the core cavity, but cannot be used to limit the present application; the movable iron core 14 is movably arranged in the guide sleeve 13, and the movable iron core 14 can move towards the static iron core 12 under the action of magnetic attraction due to the movable design; the second sealing plug 143 is disposed at an end of the movable iron core 14 facing the stationary iron core 12; the first sealing plug 142 is disposed at the other end of the movable core 14, and plugs are designed at both ends of the movable core 14, as shown in fig. 4, when the movable core 14 moves upward, the first sealing plug 142 may plug the first passage a, and when the movable core 14 moves downward, the second sealing plug 143 may plug the stationary core 12; a spring arc part is arranged on the outer surface of one end of the movable iron core 14 facing the valve body 31, the second spring 15 is arranged on the spring arc part, in fig. 6, it can be seen that the upper part of the spring arc part is a flat plane, and the connection mode of the second spring 15 is as follows: one end of the second spring is abutted against the upper flat surface of the arc part of the spring, and the other end of the second spring is abutted against the end surface of the guide sleeve 13, so that under the design, when the movable iron core 14 moves downwards due to magnetic attraction, the second spring 15 is in a pressing state, and when the magnetic attraction disappears, the restoring force of the second spring 15 can drive the movable iron core 14 to move upwards; the cover plate 10 is arranged on the electromagnetic coil 92, in the embodiment of the present application, the cover plate 10 is locked on the electromagnetic coil 92 by a nut, and the sixth sealing ring 11 is arranged between the cover plate 10 and the electromagnetic coil 92, the sixth sealing ring 11 is sealed and isolated from the outside atmosphere, so as to ensure good sealing performance and waterproof and dustproof effects, and in addition, the seventh sealing ring 121 and the eighth sealing ring 141 are designed, so as to ensure sealing performance and prevent gas leakage of the fourth valve cavity 21.

Referring to fig. 3, 4 and 5, the electromagnetic integrated valve further includes a fourth channel D, the cover plate 10 is provided with a groove channel, the stationary core 12 is provided with a middle through hole, an open end of the middle through hole is movably connected to the second sealing plug 143, and another open end of the middle through hole is connected to the groove channel through a gas path, that is, when the second sealing plug 143 is driven by the movable core 14 to move downward, the second sealing plug 143 plugs the open end of the upper end of the middle through hole, otherwise, when the second sealing plug 143 moves upward, the gas flow may flow downward through the middle through hole; the electromagnetic coil 92 is provided with a coil through hole, the coil through hole is a through hole marked by D in fig. 5, one end of the coil through hole is connected with the groove channel, and the other end of the coil through hole is connected with a connecting channel which is arranged on the valve body 31 and is connected with the third channel C; the fourth passage D is a passage connecting the fourth valve chamber 21, the middle through hole of the stationary core 12, the groove passage of the cover plate 10, the coil through hole of the electromagnetic coil 92, and the connecting passage on the valve body 31, which is connected to the third passage C, that is, the flowing process of the airflow of the fourth passage D is as follows: the gas flows from the fourth valve cavity 21 to the middle through hole of the stationary core 12, enters the groove channel of the cover plate 10 after passing through the middle through hole, enters the coil through hole of the electromagnetic coil 92 after passing through the groove channel, enters the connecting channel of the valve body 31 after passing through the coil through hole, enters the third channel C through the connecting channel, and is then discharged from the exhaust port 22. In fig. 5, in order to ensure the sealing performance between the solenoid coil assembly 9 and the valve body assembly 3, an eighth sealing ring 91 is designed to prevent gas leakage. In the present application, the first channel a, the second channel B, the third channel C, and the fourth channel D are all gas channels for gas to flow.

The working state of the electromagnetic integrated valve of the present application is explained as follows:

when the working port 2 needs to work, compressed air enters the valve body 31 through the air inlet 1, passes through the first passage A, passes through the third valve cavity 20 and is discharged through the working port 2 to work.

When the working port 2 needs to be cut off, the mandril 5 is only pressed down to enable the valve rod assembly 6 to compress the first spring 8 to move, the third valve cavity 20 is disconnected from the working port 2, so that the working port 2 loses air supply and stops working, and the gas of the working port 2 passes through the second valve cavity 19, passes through the third channel C and is exhausted through the exhaust port 22; at this time, the air in the first valve chamber 18 passes through the second passage B, the fourth passage D, and the third passage C to reach the exhaust port 22 for exhaust.

In order to prevent misoperation, the electromagnetic coil 92 is electrified when the ejector rod 5 is pressed down, the movable iron core 14 is attracted with the static iron core 12 under the action of the magnetic field force of the electromagnetic coil 92, at the moment, the second sealing plug 143 on the movable iron core 14 seals the fourth channel D, the first channel A and the second channel B are opened, the second channel B and the third channel C are disconnected, at the moment, compressed air reaches the fourth valve cavity 21 through the first channel A and then reaches the first valve cavity 18 through the second channel B, the valve rod assembly 6 overcomes the first spring 8 to move downwards under the action of air pressure, the working port 2 is disconnected with the third valve cavity 20 and the air inlet 1, and gas in the working port 2 passes through the second valve cavity 19, passes through the third channel C and then is discharged through the air outlet 22.

If the push rod 5 is not pressed at this time, the working port 2 can still be ensured to be in a cut-off state under the condition that the electromagnetic coil 92 is electrified, and the problem that the working port 2 cannot be cut off due to clamping stagnation and non-action of the push rod 5 is avoided. When the air supply work of the working port 2 needs to be recovered, the electromagnetic coil 92 is powered off, at the moment, the valve rod assembly 6 is reset under the action of the first spring 8, the air between the first valve cavity 18 and the fourth valve cavity 21 is exhausted through the fourth channel D and the third channel C and then through the exhaust port 22, and meanwhile, the air pressure of the second valve cavity 19 is exhausted from the third channel C through the exhaust port 22.

In summary, due to the adoption of the technical characteristics, compared with the prior art, the invention has the following advantages and positive effects:

the electromagnetic integrated valve has the advantages that the electromagnetic integrated valve has interlocking protection and higher reliability, and the effect of combining two products can be achieved by only using one valve body structure;

secondly, the valve body has compact structure and channel design, unidirectional air inlet and exhaust, good waterproof and dustproof effects and convenient installation;

thirdly, the valve body has stronger adaptability to the environment, more stable and reliable work and longer service life;

fourth, this application increases automatically controlled design, when mechanical fault appears in the product, still can satisfy the use, promotes the reliability.

The preferred embodiments of the invention are provided solely to aid in the illustration of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents. The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and it is intended that all equivalent variations and modifications of the present invention as those skilled in the art can be made without departing from the spirit and scope of the present invention.