阅读说明：本技术 一种旋转式换向阀、液压控制系统及橡塑一体机 (Rotary reversing valve, hydraulic control system and rubber and plastic all-in-one machine ) 是由 朱跃龙 朱耀义 于 2021-07-22 设计创作，主要内容包括：本发明属于阀门技术领域,具体为一种旋转式换向阀、液压控制系统及橡塑一体机,包括阀体、内阀芯、外阀芯、阀套、溢流阀,外阀芯转动安装在阀体的内腔中,内阀芯转动安装在外阀芯腔中,套筒固定安装在内阀芯腔中,内阀芯腔下部连通进液口,套筒内部间隔固定设有三个溢流阀,每个溢流阀上部均具有溢流腔,内阀芯侧壁上具有多个出液孔,每个出液孔与其中一个溢流腔相连通,阀体侧壁上具有多个出液口,外阀芯上具有多个过流孔,过流孔、出液孔、出液口相连通时,使出液口导通。通过内阀芯和外阀芯的配合,任意的切换多个出液口的连通状态,灵活的进行压力油的供给,内阀芯和外阀芯不会受到液压油的压力的影响,更加精确的进行流量调节。(The invention belongs to the technical field of valves, and particularly relates to a rotary reversing valve, a hydraulic control system and a rubber and plastic integrated machine. Through the cooperation of inner valve core and outer valve core, the intercommunication state of a plurality of liquid outlets of arbitrary switching, nimble supply of carrying out pressure oil, inner valve core and outer valve core can not receive the influence of the pressure of hydraulic oil, more accurate carry out flow control.)

1. A rotary reversing valve comprises a valve body, an inner valve core, an outer valve core, a valve sleeve, an overflow valve, a valve cover and a liquid inlet connector, wherein the valve cover is in threaded connection with the lower part of the valve body; the outer valve core is rotatably arranged in an inner cavity of the valve body, the inner valve core is rotatably arranged in an outer valve core cavity, the sleeve is fixedly arranged in the inner valve core cavity, the lower part of the inner valve core cavity is communicated with the liquid inlet, three overflow valves are fixedly arranged in the sleeve at intervals, the three overflow valves are a first overflow valve, a second overflow valve and a third overflow valve from top to bottom in sequence, the opening pressures of the first overflow valve, the second overflow valve and the third overflow valve are reduced in sequence, and an overflow cavity is arranged at the upper part of each overflow valve; the method is characterized in that: the liquid outlet valve comprises an inner valve core and an outer valve core, wherein the inner valve core is provided with a plurality of liquid outlet holes, each liquid outlet hole is communicated with one overflow cavity, the valve body side wall is provided with three liquid outlets or a left valve body side wall and a right valve body side wall, the three overflow cavities correspond to the three liquid outlets, the outer valve core is provided with a plurality of overflowing holes, when the overflowing holes, the liquid outlet holes and the liquid outlets are communicated, and one or more liquid outlets can be communicated in the rotating process of the outer valve core.

2. A rotary reversing valve according to claim 1, wherein: the device also comprises a first driving device and a second driving device; the first driving device is arranged at the top of the valve body and used for driving the inner valve core to rotate; an outer gear ring is arranged on the outer side of the lower portion of the outer valve core, the outer gear ring is meshed with a transmission gear, the transmission gear is meshed with a driving gear, and a second driving device drives the driving gear to rotate.

3. A rotary reversing valve according to claim 1, wherein: the upper part of the outer valve core is provided with a first annular bearing, the lower part of the outer valve core is provided with a second annular bearing, the lower part of the inner valve core is provided with a third annular bearing, and the lower part of the third annular bearing is provided with a spring.

4. A rotary reversing valve according to claim 1, wherein: the opening pressure of the first overflow valve is 2-5 times that of the second overflow valve, and the opening pressure of the second overflow valve is 2-5 times that of the third overflow valve.

5. A rotary reversing valve according to claim 1, wherein: when having three liquid outlets on the valve body lateral wall, with inner valve core surface or outer valve core surface tiling see, its goes out the liquid hole and has evenly arranged 7 rows in circumference, and the number of columns is recorded as Ki, and its goes out the liquid hole and has the triplex row in the axial, and the number of rows is recorded as Kj, and the position of going out the liquid hole is recorded as K (I, j), and the coordinate of all going out the liquid hole is K (1,1), K (2,1), K (2,2), K (3,2), K (4,2), K (4,3), K (5,3), K (6,1), K (6,3), K (7,1), K (7,2), K (7,3) respectively.

6. A rotary reversing valve according to claim 5, wherein: when three liquid outlets are symmetrically arranged on the left side wall and the right side wall of the valve body respectively, when the outer surface of the inner valve core or the outer surface of the outer valve core is tiled, 14 rows of liquid outlet holes are uniformly arranged in the circumferential direction, the number of the rows is Ki, three rows of liquid outlet holes are arranged in the axial direction, the number of the rows is Kj, the position of the liquid outlet holes is K (I, j), the coordinates of all the liquid outlet holes are K (1,1), K (2,1), K (2,2), K (3, 3), K (4,3), K (5,3), K (6,1), K (6,3), K (7,1), K (7,2), K (7,3), K (8,3), K (9,3), K (10,1), K (10,3), K (11,1), K (12,1), K (12,2), K (13,2), K (14), 1) k (14,2), K (14, 3).

7. A hydraulic control system comprising the rotary reversing valve of any one of claims 1-6.

8. An all-in-one rubber and plastic machine comprising the hydraulic control system of claim 7.

Technical Field

The invention belongs to the technical field of valves, and particularly relates to a rotary reversing valve, a hydraulic control system and a rubber and plastic integrated machine.

Background

The reversing valve is one of important components in a hydraulic control system, and can change the flow direction of fluid, further change the hydraulic direction output by the reversing valve and operate the hydraulic components in the hydraulic control system. However, most of the existing reversing valves are slide valves, the communication state of each inflow port and each outflow port is switched by reciprocating movement of a slide valve core in a through hole of a valve body, the force for moving the valve core comes from an electromagnetic coil or hydraulic thrust, and the electromagnetic force is unstable due to the fact that the current of the electromagnetic coil is easily affected by the outside to generate fluctuation and the distance between the coil and an armature changes, so that the movement of the valve core of the electromagnetic reversing valve is unstable, and the pressure of fluid distributed by the reversing valve is unstable; the hydraulic thrust drives the valve core of the reversing valve to move, and because the hydraulic fluid comes from the outside, the hydraulic fluid often fluctuates and can interfere with the pressure of the working fluid, the valve core of the reversing valve can also be unstable in movement, and the pressure of the fluid distributed by the reversing valve is unstable.

Although the rotary reversing valve in the prior art can avoid the interference of the valve core driving force in the slide valve on the working fluid pressure, the rotary reversing valve only can perform simple reversing, cannot perform fine management according to the working fluid pressure, and cannot realize the cooperative management of a hydraulic system among multiple pipelines and multiple devices. In the rubber and plastic production process, multiple devices are required to work in a coordinated mode, the devices are distributed, the occupied area is large, the management is difficult, different hydraulic supplies are needed in different working flows, the supply of hydraulic working fluid is achieved through multiple hydraulic devices or multiple reversing valves, the pipeline results are complex, the operation difficulty is high, and the problem is not easy to find out.

Disclosure of Invention

The invention aims to provide a rotary reversing valve, a hydraulic control system and a rubber and plastic all-in-one machine, which can more accurately regulate flow by matching an inner valve core and an outer valve core and have more pressure regulating positions; the cooperative management of the hydraulic system among multiple pipelines and multiple devices can be realized, and the applicability of the hydraulic control system is improved; simplify pipeline and equipment structure, be convenient for the management of whole production facility and the maintenance of problem, improve production efficiency.

In order to achieve the purpose, the invention provides the following technical scheme: a rotary reversing valve comprises a valve body, an inner valve core, an outer valve core, a valve sleeve, an overflow valve, a valve cover and a liquid inlet connector, wherein the valve cover is in threaded connection with the lower part of the valve body; the outer valve core is rotatably arranged in an inner cavity of the valve body, the inner valve core is rotatably arranged in an outer valve core cavity, the sleeve is fixedly arranged in the inner valve core cavity, the lower part of the inner valve core cavity is communicated with the liquid inlet, three overflow valves are fixedly arranged in the sleeve at intervals, the three overflow valves are a first overflow valve, a second overflow valve and a third overflow valve from top to bottom in sequence, the opening pressures of the first overflow valve, the second overflow valve and the third overflow valve are reduced in sequence, and an overflow cavity is arranged at the upper part of each overflow valve; the method is characterized in that: the liquid outlet valve comprises an inner valve core and an outer valve core, wherein the inner valve core is provided with a plurality of liquid outlet holes, each liquid outlet hole is communicated with one overflow cavity, the valve body side wall is provided with three liquid outlets or a left valve body side wall and a right valve body side wall, the three overflow cavities correspond to the three liquid outlets, the outer valve core is provided with a plurality of overflowing holes, when the overflowing holes, the liquid outlet holes and the liquid outlets are communicated, and one or more liquid outlets can be communicated in the rotating process of the outer valve core. In the technical scheme, the communicating state of the liquid outlets is switched randomly through the matching of the inner valve core and the outer valve core, pressure oil is flexibly supplied, even if the pressure of hydraulic oil fluctuates, the inner valve core and the outer valve core cannot be influenced by the pressure of the hydraulic oil and only rotate under the driving of the driving device, and the flow can be more accurately regulated.

Preferably, the device further comprises a first driving device and a second driving device; the first driving device is arranged at the top of the valve body and used for driving the inner valve core to rotate; an outer gear ring is arranged on the outer side of the lower portion of the outer valve core, the outer gear ring is meshed with a transmission gear, the transmission gear is meshed with a driving gear, and a second driving device drives the driving gear to rotate.

Preferably, the upper part of the outer valve core is provided with a first annular bearing, the lower part of the outer valve core is provided with a second annular bearing, the lower part of the inner valve core is provided with a third annular bearing, and the lower part of the third annular bearing is provided with a spring. Through the setting of bearing, can guarantee smooth and easy rotation of inner valve core and outer valve core.

Preferably, the opening pressure of the first overflow valve is 2-5 times that of the second overflow valve, and the opening pressure of the second overflow valve is 2-5 times that of the third overflow valve. Three overflow valves are arranged in the inner valve core cavity, so that the supply of pressure oil can be divided into different pressure gears, and the requirements of a plurality of devices on hydraulic oil with different pressures are met.

Preferably, when three liquid outlets are formed in the side wall of the valve body, when the outer surface of the inner valve core or the outer surface of the outer valve core is tiled, 7 rows of liquid outlet holes are uniformly arranged in the circumferential direction, the number of the rows is represented as Ki, the number of the liquid outlet holes is three, the number of the rows is represented as Kj, the position of the liquid outlet holes is represented as K (I, j), and the coordinates of all the liquid outlet holes are K (1,1), K (2,2), K (3, 3), K (4,2), K (4,3), K (5,3), K (6,1), K (6,3), K (7,1), K (7,2) and K (7,3), respectively.

Preferably, when three liquid outlets are symmetrically arranged on the left side wall and the right side wall of the valve body respectively, when the outer surface of the inner valve core or the outer surface of the outer valve core is tiled, the liquid outlet holes are uniformly arranged with 14 rows in the circumferential direction, the number of the rows is represented by Ki, the liquid outlet holes have three rows in the axial direction, the number of the rows is represented by Kj, the position of the liquid outlet holes is represented by K (I, j), and the coordinates of all the liquid outlet holes are respectively K (1,1), K (2,2), K (3,2), K (4,3), K (5,3), K (6,1), K (6,3), K (7,1), K (7,2), K (7,3), K (8,2), K (8,3), K (9,3), K (10,1), K (10,3), K (11,1), K (12,2), K (13), 2) k (14,1), K (14,2), K (14, 3). Through the design of the arrangement positions of the through holes on the inner valve core and the outer valve core, the through holes of the inner valve core and the outer valve core are more matched, the working positions are as many as possible, and the pressure supply is more selected.

A hydraulic control system comprising the rotary reversing valve of any one of claims 1-6. Through the fine adjustment of the rotary reversing valve, the cooperative management of a hydraulic system among multiple pipelines and multiple devices is realized.

An all-in-one rubber and plastic machine comprising the hydraulic control system of claim 7. In the rubber and plastic production equipment, the hydraulic control system can be used for carrying out integrated arrangement of multiple equipment, so that the pipeline structure is simplified, and the management of the whole production process is facilitated.

Compared with the prior art, the invention has the beneficial effects that:

(1) the communication states of the liquid outlets are switched at will through the matching of the inner valve core and the outer valve core, and the supply of pressure oil is flexibly carried out; even if the pressure of the hydraulic oil fluctuates, the inner valve core and the outer valve core are not influenced by the pressure of the hydraulic oil and only rotate under the driving of the driving device, so that the flow can be more accurately regulated; through the design of the arrangement positions of the through holes on the inner valve core and the outer valve core, the through holes of the inner valve core and the outer valve core are more matched, the working positions are as many as possible, and the pressure supply is more selected.

(2) Through the fine adjustment of the rotary reversing valve, the cooperative management of a hydraulic system among multiple pipelines and multiple devices can be realized, and the applicability of the hydraulic control system is improved.

(3) In rubber and plastic production facility, can carry out the integrated arrangement of multi-device through above-mentioned hydraulic control system, simplify pipeline and equipment structure, the management of the whole production facility of being convenient for and the maintenance of problem improve production efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a first embodiment of a rotary reversing valve of the present invention.

Fig. 2 is a second embodiment of the rotary reversing valve of the present invention.

Fig. 3 is a schematic structural view of the inner valve element of the present invention.

Fig. 4 is a schematic structural view of the outer valve element of the present invention.

Fig. 5 is a schematic view showing the arrangement of through holes of the inner and outer spools in accordance with the first embodiment of the present invention.

Fig. 6 is a schematic view showing the arrangement of through holes of the inner and outer valve spools in the second embodiment of the present invention.

In the figure, the first driving device 1, the inner valve core 2, the liquid outlet hole 21, the inner valve core cavity 22, the valve body 3, the liquid outlet 31, the outer valve core 4, the outer gear 41, the outer valve core cavity 42, the overflowing hole 43, the overflowing valve 5, the first overflowing valve 51, the second overflowing valve 52, the third overflowing valve 53, the overflowing cavity 54, the valve sleeve 6, the spring 7, the transmission gear 8, the driving gear 9, the second driving device 10, the valve cover 11, the liquid inlet joint 12, the liquid inlet 13, the first annular bearing 14, the second annular bearing 15 and the third annular bearing 16.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

Referring to fig. 1, 3-5, a first embodiment of the present invention: a rotary reversing valve comprises a valve body 3, an inner valve core 2, an outer valve core 4, a valve sleeve 6, an overflow valve 5, a valve cover 11 and a liquid inlet connector 12, wherein the valve cover 11 is in threaded connection with the lower part of the valve body 3, the liquid inlet connector 12 is arranged on the lower part of the valve cover 11, and a liquid inlet 13 is arranged on the liquid inlet connector 12; the outer valve core 4 is rotatably arranged in an inner cavity of the valve body 3, the inner valve core 2 is rotatably arranged in the outer valve core cavity 42, the sleeve is fixedly arranged in the inner valve core cavity 22, the lower part of the inner valve core cavity 22 is communicated with the liquid inlet 13, three overflow valves 5 are fixedly arranged in the sleeve at intervals, the three overflow valves 5 are a first overflow valve 51, a second overflow valve 52 and a third overflow valve 53 from top to bottom in sequence, the opening pressures of the first overflow valve 51, the second overflow valve 52 and the third overflow valve 53 are reduced in sequence, and an overflow cavity 54 is arranged at the upper part of each overflow valve 5; the side wall of the inner valve core 2 is provided with a plurality of liquid outlet holes 21, each liquid outlet hole 21 is communicated with one overflow cavity 54, the side wall of the valve body 3 is provided with three liquid outlets 31, the three overflow cavities 54 correspond to the three liquid outlets 31, the outer valve core 4 is provided with a plurality of overflowing holes 43, when the overflowing holes 43, the liquid outlet holes 21 and the liquid outlets 31 are communicated, and in the rotating process of the outer valve core 4, one or more liquid outlets 31 can be communicated.

Alternatively, the number of the relief valves 5 can be more than 3, and the arrangement mode is the same as that of the embodiment; the number of the through holes on the inner valve core 2, the outer valve core 4 and the valve body 3 can also be changed, for example, the number of the through holes in the axial direction can be more than 3.

The rotary reversing valve also comprises a first driving device 1 and a second driving device 10; the first driving device 1 is arranged at the top of the valve body 3 and used for driving the inner valve core 2 to rotate; an outer gear ring 41 is arranged on the outer side of the lower portion of the outer valve core 4, the outer gear ring 41 is meshed with the transmission gear 8, the transmission gear 8 is meshed with the driving gear 9, and the second driving device 10 drives the driving gear 9 to rotate.

The upper part of the outer valve core 4 is provided with a first annular bearing 14, the lower part of the outer valve core 4 is provided with a second annular bearing 15, the lower part of the inner valve core 2 is provided with a third annular bearing 16, and the lower part of the third annular bearing 16 is provided with a spring 7.

The opening pressure of the first relief valve 51 is 2 to 5 times that of the second relief valve 52, and the opening pressure of the second relief valve 52 is 2 to 5 times that of the third relief valve 53.

When the side wall of the valve body 3 is provided with three liquid outlets 31, when the outer surface of the inner valve core 2 or the outer surface of the outer valve core 4 is tiled, 7 rows of liquid outlet holes 21 are uniformly arranged in the circumferential direction, the number of the rows is represented as Ki, three rows of the liquid outlet holes 21 are axially provided with three rows, the number of the rows is represented as Kj, the positions of the liquid outlet holes 21 are represented as K (I, j), and the coordinates of all the liquid outlet holes 21 are respectively K (1,1), K (2,2), K (3,2), K (4,3), K (5,3), K (6,1), K (6,3), K (7,1), K (7,2) and K (7, 3).

Referring to fig. 2-4 and 6, the second embodiment of the present invention: a rotary reversing valve comprises a valve body 3, an inner valve core 2, an outer valve core 4, a valve sleeve 6, an overflow valve 5, a valve cover 11 and a liquid inlet connector 12, wherein the valve cover 11 is in threaded connection with the lower part of the valve body 3, the liquid inlet connector 12 is arranged on the lower part of the valve cover 11, and a liquid inlet 13 is arranged on the liquid inlet connector 12; the outer valve core 4 is rotatably arranged in an inner cavity of the valve body 3, the inner valve core 2 is rotatably arranged in the outer valve core cavity 42, the sleeve is fixedly arranged in the inner valve core cavity 22, the lower part of the inner valve core cavity 22 is communicated with the liquid inlet 13, three overflow valves 5 are fixedly arranged in the sleeve at intervals, the three overflow valves 5 are a first overflow valve 51, a second overflow valve 52 and a third overflow valve 53 from top to bottom in sequence, the opening pressures of the first overflow valve 51, the second overflow valve 52 and the third overflow valve 53 are reduced in sequence, and an overflow cavity 54 is arranged at the upper part of each overflow valve 5; the method is characterized in that: the side wall of the inner valve core 2 is provided with a plurality of liquid outlet holes 21, each liquid outlet hole 21 is communicated with one overflow cavity 54, the left side wall and the right side wall of the valve body 3 are symmetrically provided with three liquid outlets 31 respectively, the three overflow cavities 54 correspond to the three liquid outlets 31, the outer valve core 4 is provided with a plurality of overflowing holes 43, when the overflowing holes 43, the liquid outlet holes 21 and the liquid outlets 31 are communicated, and in the rotating process of the outer valve core 4, one or more liquid outlets 31 can be communicated.

Alternatively, the number of the relief valves 5 can be more than 3, and the arrangement mode is the same as that of the embodiment; the number of the through holes on the inner valve core 2, the outer valve core 4 and the valve body 3 can also be changed, for example, the number of the through holes in the axial direction can be more than 3.

The rotary reversing valve also comprises a first driving device 1 and a second driving device 10; the first driving device 1 is arranged at the top of the valve body 3 and used for driving the inner valve core 2 to rotate; an outer gear ring 41 is arranged on the outer side of the lower portion of the outer valve core 4, the outer gear ring 41 is meshed with the transmission gear 8, the transmission gear 8 is meshed with the driving gear 9, and the second driving device 10 drives the driving gear 9 to rotate.

The upper part of the outer valve core 4 is provided with a first annular bearing 14, the lower part of the outer valve core 4 is provided with a second annular bearing 15, the lower part of the inner valve core 2 is provided with a third annular bearing 16, and the lower part of the third annular bearing 16 is provided with a spring 7.

The opening pressure of the first relief valve 51 is 2 to 5 times that of the second relief valve 52, and the opening pressure of the second relief valve 52 is 2 to 5 times that of the third relief valve 53.

When three liquid outlets 31 are symmetrically arranged on the left side wall and the right side wall of the valve body 3, when the outer surface of the inner valve core 2 or the outer surface of the outer valve core 4 is tiled, the liquid outlet holes 21 are uniformly arranged with 14 rows in the circumferential direction, the row number is Ki, the liquid outlet holes 21 have three rows in the axial direction, the row number is Kj, the position of the liquid outlet hole 21 is K (I, j), and the coordinates of all the liquid outlet holes 21 are K (1,1), K (2,2), K (3,2), K (4,3), K (5,3), K (6,1), K (6,3), K (7,1), K (7,2), K (7,3), K (8,2), K (8,3), K (9,3), K (10,1), K (10,3), K (11,1), K (12,2), k (13,2), K (14,1), K (14,2), K (14, 3).

The third embodiment of the invention: a hydraulic control system includes a rotary reversing valve. The rotary reversing valve is arranged in the hydraulic control system, so that hydraulic oil can be distributed and pressure can be adjusted, the normal work of the hydraulic control system is guaranteed, the cooperative management of the hydraulic system among multiple pipelines and multiple devices can be realized, and the applicability of the hydraulic control system is improved.

The fourth embodiment of the invention: a rubber and plastic all-in-one machine comprises a hydraulic control system. The hydraulic control system can be used for carrying out integrated arrangement on multiple devices, simplifies the pipeline and the device structure, is convenient for the management of the whole production device and the maintenance of problems, and improves the production efficiency.

The working principle of the rotary reversing valve of the invention is as follows: the hydraulic oil supply equipment provides hydraulic oil to the liquid inlet 13, the outer valve core 4 is rotated to enable any 1, 2 or 3 overflowing holes 43 on the outer valve core 4 to be aligned with the liquid outlet 31 on the valve body 3 to form a communicating channel, then the inner valve core 2 is rotated to enable any 1, 2 or 3 on the inner valve core 2 to be aligned with the communicating channel, so that the communication of the whole fluid channel is realized, and at the moment, the hydraulic oil can flow to the liquid outlet 31 from the liquid inlet 13; when the pressure of the hydraulic oil is small, the hydraulic oil can only pass through the third overflow valve 53, only simple reversing operation can be performed, the requirement of a small amount of equipment can be met, when the number of the working equipment is increased, the pressure of the hydraulic oil can be increased, the hydraulic oil can pass through the second overflow valve 52 or the first overflow valve 51, and therefore more pipelines or equipment can be supplied with the hydraulic oil.

As an alternative embodiment, the number or arrangement of the through holes on the inner valve core 2, the outer valve core 4 and the valve body 3 may also be expanded, as long as the flexible supply of the pressure oil of multiple devices and multiple pipelines can be flexibly realized through the rotation of the inner valve core 2 and the outer valve core 4.

As used in the specification and in the claims, certain terms are used to refer to particular components. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.

It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.

The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.