阅读说明：本技术 一种市政应急高架桥 (Emergent overpass of municipal administration ) 是由 宋亚伟 仝斌斌 荆留涛 王松强 吕书建 高守垒 崔忠朝 连金列 陶相琴 杨辉 张 于 2019-10-22 设计创作，主要内容包括：本发明属于桥梁技术领域,具体的说是一种市政应急高架桥,包括两个基座；基座顶部设有钢桁架制成的墩身,墩身顶部固连有平台；平台一侧铰接有桥面,桥面下方倾斜设置有油缸,油缸一端与桥面底部铰接,另一端与墩身上部铰接,油缸用过阀门和管道与高压油泵连接；桥面工作时通过油缸收缩后折叠,减小占地面积；桥面远离墩身的一侧设有一组卡口,另一侧桥面侧面与卡口对应位置设有一组T形的卡柱,通过卡柱与卡口配合使得两个桥面相互锁紧；本发明通过油缸推动桥面缓慢转动后,使得卡柱卡入卡口中使得两个桥面紧固连接,即可使得桥面快速安装到位,节省大型吊装设备的使用,提高高架桥的安装效率。(The invention belongs to the technical field of bridges, and particularly relates to a municipal emergency viaduct which comprises two bases; the top of the base is provided with a pier body made of a steel truss, and the top of the pier body is fixedly connected with a platform; one side of the platform is hinged with a bridge floor, an oil cylinder is obliquely arranged below the bridge floor, one end of the oil cylinder is hinged with the bottom of the bridge floor, the other end of the oil cylinder is hinged with the upper part of the pier body, and the oil cylinder is connected with a high-pressure oil pump through a valve and a pipeline; when the bridge deck works, the oil cylinder contracts and then folds, so that the floor area is reduced; one side of the bridge deck, which is far away from the pier body, is provided with a group of bayonets, the side surface of the bridge deck on the other side is provided with a group of T-shaped clamping columns at positions corresponding to the bayonets, and the two bridge decks are locked with each other through the matching of the clamping columns and the bayonets; according to the invention, after the oil cylinder pushes the bridge deck to rotate slowly, the clamping column is clamped into the bayonet, so that the two bridge decks are connected tightly, the bridge decks can be installed in place quickly, the use of large-scale hoisting equipment is saved, and the installation efficiency of the viaduct is improved.)

1. The utility model provides an emergent overpass of municipal administration which characterized in that: comprises two bases (1); a pier body (11) made of a steel truss is arranged at the top of the base (1), and a platform (12) is fixedly connected to the top of the pier body (11); one side of the platform (12) is hinged with a bridge deck (13), an oil cylinder (14) is obliquely arranged below the bridge deck (13), one end of the oil cylinder (14) is hinged with the bottom of the bridge deck (13), the other end of the oil cylinder is hinged with the upper part of the pier body (11), and the oil cylinder (14) is connected with a high-pressure oil pump through a valve and a pipeline; when the bridge deck (13) works, the bridge deck is folded after being contracted by the oil cylinder (14), so that the floor area is reduced; one side, far away from the pier body (11), of the bridge deck (13) is provided with a group of bayonets (15), the side face of the bridge deck (13) on the other side is provided with a group of T-shaped clamping columns (16) at positions corresponding to the bayonets (15), and the two bridge decks (13) are locked with each other through the matching of the clamping columns (16) and the bayonets (15); the viaduct can be rapidly installed through the cooperation of the oil cylinder (14) and the bridge deck (13) hinged with the pier body (11), the installation time is saved, large-scale hoisting equipment is used, and the installation efficiency of the viaduct is improved.

2. The municipal emergency viaduct according to claim 1, wherein: the pier body (11) is hinged with the base (1) through a hinged support; one side, far away from the bridge floor (13), of the base (1) is fixedly connected with an extension frame (2), one end, far away from the base (1), of the extension frame (2) is rotatably connected with a winding drum (21), the winding drum (21) is driven by a speed reducing motor, and the speed reducing motor is connected with a power supply through a controller; a steel wire rope (22) is wound on the winding drum (21), and the other end of the steel wire rope (22) is connected with the pier body (11) close to the bridge deck (13); the steel wire rope (22) is wound through the winding drum (21), and then the pier body (11) is erected, so that the installation efficiency of the viaduct is further improved.

3. The municipal emergency viaduct according to claim 2, wherein: a roller (23) is rotatably connected to the part, close to the platform (12), of the pier body (11), a pair of discs are fixedly connected to two sides of the roller (23), and pin holes (24) are uniformly formed in the circumferences of the discs; a limiting frame (25) is fixedly connected to the pier body (11) at a position corresponding to the roller (23), a limiting hole (26) is formed in the limiting frame (25), and a limiting pin is inserted into the limiting hole (26) and the pin hole (24) to lock the roller (23); the steel wire ropes (22) are wound on the rollers (23) for a plurality of circles and then fixedly connected with the pier bodies (11) on the other side, and the steel wire ropes (22) between the two pier bodies (11) are arranged in a crossed manner, so that the stability of the bridge deck (13) and the pier bodies (11) is further enhanced.

4. The municipal emergency viaduct according to claim 1, wherein: the opening of bayonet socket (15) is equipped with splayed flaring (17), and flaring (17) are arranged in the bayonet socket (15) of card post (16) fast alignment and card income, further strengthen the stability of bridge floor (13) and pier shaft (11).

5. The municipal emergency viaduct according to claim 3, wherein: a group of cushion pads (27) made of special rubber are arranged between the top of the pier body (11) and the platform (12), and the cushion pads (27) are used for blocking vibration of the bridge deck (13) and increasing the stability of the pier body (11); a pair of limit baffle (28) is embedded in the buffer pad (27), the limit baffle (28) is fixedly connected with the platform (12) and the pier body (11) respectively, and the limit baffle (28) is used for preventing the platform (12) and the pier body (11) from being displaced too much, avoiding the bridge deck (13) from collapsing after dislocation, and increasing the stability and the safety of the viaduct.

6. The municipal emergency viaduct according to claim 5, wherein: the periphery of the buffer cushion (27) is wound with the steel rope (29), the steel rope (29) is used for enhancing the bearing capacity of the buffer cushion (27), the plastic deformation of the buffer cushion (27) is reduced, the elasticity of the buffer cushion (27) is further ensured, and the stability and the safety of the viaduct are further improved.

Technical Field

The invention belongs to the technical field of bridges, and particularly relates to a municipal emergency viaduct.

Background

In order to relieve the traffic jam of urban roads, a high-speed road of a surrounding urban viaduct is built, long-distance cross-district passenger flow and logistics vehicles are shunted from the ground, so that the traffic flow crossing the urban central ground road is reduced, but because a plurality of ramps of the viaduct and the ground road overpass occupy large land area, the upper and lower ports of the overpass are mostly built at the periphery of the city, most vehicles wind a half circle around the city, or enter the crowded ground traffic lane in the city, and the advancing speed is slow; when emergency official business affairs or emergency rescue and disaster relief are met, a ground emergency quick channel is not available for vehicles and equipment to quickly reach a destination.

Disclosure of Invention

The invention provides a municipal emergency viaduct, which aims to make up the defects of the prior art and solve the problem that vehicles and equipment can quickly reach a destination without a ground emergency fast channel when emergency official business or emergency relief work is carried out at a position with large traffic flow on a ground road in a center of a city.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a municipal emergency viaduct which comprises two bases; the top of the base is provided with a pier body made of a steel truss, and the top of the pier body is fixedly connected with a platform; one side of the platform is hinged with a bridge floor, an oil cylinder is obliquely arranged below the bridge floor, one end of the oil cylinder is hinged with the bottom of the bridge floor, the other end of the oil cylinder is hinged with the upper part of the pier body, and the oil cylinder is connected with a high-pressure oil pump through a valve and a pipeline; when the bridge deck works, the bridge deck is folded after being contracted through the oil cylinder, so that the floor area is reduced; a set of bayonets is arranged on one side of the bridge floor, which is far away from the pier body, a set of T-shaped clamping columns are arranged on the side face of the bridge floor, which corresponds to the bayonets, on the other side of the bridge floor, and the two bridge floors are locked with each other through the matching of the clamping columns and the bayonets; the viaduct can be quickly installed through the oil cylinder and the bridge floor hinged with the pier body, so that the installation time and large-scale hoisting equipment are saved, and the installation efficiency of the viaduct is improved; the during operation, will emergent overpass transport predetermined mounted position, later fix the base subaerial, then let in highly compressed hydraulic oil for the oil pump oil feed cylinder, make the hydro-cylinder promote the bridge floor and slowly rotate, when the bridge floor that is equipped with the bayonet socket stretches out completely and keeps the level, the bridge floor that rethread hydro-cylinder promoted the opposite side rotates, when the card post rotates the position that is close the bayonet socket, card post card is gone into and is made two bridge floor fastening connection in the bayonet socket, can make the bridge floor install target in place fast, save large-scale hoisting equipment's use, improve the installation effectiveness of overpass.

Preferably, the pier body is hinged with the base through a hinged support; one side of the base, which is far away from the bridge floor, is fixedly connected with an extension frame, one end of the extension frame, which is far away from the base, is rotatably connected with a winding drum, the winding drum is driven by a speed reducing motor, and the speed reducing motor is connected with a power supply through a controller; a steel wire rope is wound on the winding drum, and the other end of the steel wire rope is connected with the part of the pier body close to the bridge floor; the steel wire rope is wound through the winding drum, so that the pier body is erected, and the installation efficiency of the viaduct is further improved; after the base installation targets in place, through controller start gear motor, gear motor drives the reel and rotates, and wire rope is tightened up to the reel, and then makes the pier shaft erect, after the pier shaft erects completely, link firmly pier shaft and chassis through welding equipment, strengthens the stability of pier shaft, drives the pier shaft through the reel and erects, makes in the space limited, the viaduct can be installed fast to the position that large-scale hoisting equipment is difficult to enter the field, reduces the influence to road traffic in the viaduct installation simultaneously, further improves the installation effectiveness of viaduct.

Preferably, the pier body is rotatably connected with a roller wheel at a position close to the platform, a pair of discs is fixedly connected to two sides of the roller wheel, and pin holes are uniformly formed in the circumferences of the discs; a limiting frame is fixedly connected to the pier body at a position corresponding to the roller, a limiting hole is formed in the limiting frame, and a limiting pin is inserted into the limiting hole and the pin hole to lock the roller; the steel wire ropes are wound on the rollers for a plurality of circles and then fixedly connected with the pier bodies on the other side, and the steel wire ropes between the two pier bodies are arranged in a crossed manner, so that the stability of the bridge deck and the pier bodies is further enhanced; when the pier shaft needs to be erected, insert spacing pin in the spacing hole, make spacing pinning surely go into in the pinhole, running roller links firmly with spacing this moment, make wire rope pulling pier shaft, and then make pier shaft erect, after pier shaft erects completely and is fixed with the base, extract the pin in the pinhole, then link firmly with relative pier shaft with the one end that the reel was kept away from to wire rope, later tighten up wire rope through the reel, then accomplish the fixed to the running roller through pin card income pinhole, make and be fork form tensioning wire rope between two pier shafts, further improve the stability of bridge floor and pier shaft.

Preferably, a splayed flaring is arranged at the opening of the bayonet and used for quickly aligning the clamping column and clamping the clamping column into the bayonet, so that the stability of the bridge deck and the pier body is further enhanced; the clamping columns can be conveniently and quickly embedded into the bayonets through the flaring, the adjustment work of the base together with the pier body is reduced, and the installation efficiency of the viaduct is further improved.

Preferably, a group of cushion pads made of special rubber are arranged between the top of the pier body and the platform, and the cushion pads are used for blocking vibration of the bridge deck and increasing the stability of the pier body; the buffer cushion is embedded with a pair of limiting baffles, the limiting baffles are fixedly connected with the platform and the pier body respectively, and the limiting baffles are used for preventing the platform and the pier body from excessively displacing, avoiding the bridge deck from collapsing after dislocation and increasing the stability and safety of the viaduct; through the blotter elastic deformation absorption vibration energy when compressed, and then reduce the bridge floor and bear on the pier shaft and the chassis of vibration transmission that produce when the vehicle, further increase the stability of pier shaft, guarantee the security of overpass, through two limit baffle, can prevent that the relative platform of bridge floor and pier shaft displacement are too big, avoid the excessive displacement of bridge floor, further increase the stability and the security of overpass.

Preferably, the periphery of the cushion pad is wound with a steel rope, and the steel rope is used for enhancing the bearing capacity of the cushion pad and reducing the plastic deformation of the cushion pad, so that the elasticity of the cushion pad is ensured, and the stability and the safety of the viaduct are further improved; the steel rope is used for winding the periphery of the cushion pad, so that the transverse deformation of the cushion pad is controlled, the bearing capacity of the cushion pad is further increased, the special rubber consumption of the cushion pad is reduced, the purchasing cost of the viaduct is further reduced, and the stability and the safety of the viaduct are further improved.

The invention has the following beneficial effects:

1. according to the municipal emergency viaduct, after the deck is pushed by the oil cylinder to rotate slowly, the clamping columns are clamped into the clamping openings, so that the two decks are connected tightly, the deck can be installed in place quickly, the use of large-scale hoisting equipment is saved, and the installation efficiency of the viaduct is improved.

2. According to the municipal emergency viaduct, vibration energy is absorbed through elastic deformation of the buffer cushion when the buffer cushion is compressed, so that the vibration generated when the bridge deck bears vehicles is reduced and transmitted to the pier body and the chassis, the stability of the pier body is further improved, the safety of the viaduct is ensured, the bridge deck can be prevented from excessively displacing relative to the platform and the pier body through the two limiting baffles, the bridge deck is prevented from excessively displacing, and the stability and the safety of the viaduct are further improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is an isometric view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

FIG. 5 is an enlarged view of a portion of FIG. 2 at C;

in the figure: the device comprises a base 1, a pier body 11, a platform 12, a bridge deck 13, an oil cylinder 14, a bayonet 15, a clamping column 16, an extension frame 2, a winding drum 21, a steel wire rope 22, a roller 23, a pin hole 24, a limiting frame 25, a limiting hole 26, a flaring 17, a cushion pad 27, a limiting baffle 28 and a steel rope 29.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 5, the municipal emergency viaduct of the invention comprises two bases 1; a pier body 11 made of a steel truss is arranged at the top of the base 1, and a platform 12 is fixedly connected to the top of the pier body 11; one side of the platform 12 is hinged with a bridge deck 13, an oil cylinder 14 is obliquely arranged below the bridge deck 13, one end of the oil cylinder 14 is hinged with the bottom of the bridge deck 13, the other end of the oil cylinder 14 is hinged with the upper part of the pier body 11, and the oil cylinder 14 is connected with a high-pressure oil pump through a valve and a pipeline; when the bridge deck 13 works, the oil cylinder 14 contracts and then folds, so that the occupied area is reduced; a set of bayonets 15 is arranged on one side of the bridge deck 13, which is far away from the pier body 11, a set of T-shaped clamping columns 16 is arranged on the side face of the bridge deck 13 on the other side, which corresponds to the bayonets 15, and the two bridge decks 13 are locked with each other through the matching of the clamping columns 16 and the bayonets 15; the viaduct can be quickly installed through the cooperation of the oil cylinder 14 and the bridge floor 13 hinged with the pier body 11, so that the installation time and large-scale hoisting equipment are saved, and the installation efficiency of the viaduct is improved; during operation, transport emergent overpass to predetermined mounted position, later with base 1 fixed subaerial, then let in high-pressure hydraulic oil for hydro-cylinder 14 through the oil pump for hydro-cylinder 14 promotes bridge floor 13 and slowly rotates, when the bridge floor 13 that is equipped with bayonet 15 is stretched out completely and is kept the level, promote the bridge floor 13 rotation of opposite side through hydro-cylinder 14 again, when card post 16 rotates the position that is close bayonet 15, card post 16 card is gone into in bayonet 15 and is made two bridge floor 13 fastening connection, can make bridge floor 13 install fast in place, save large-scale hoisting equipment's use, improve the installation effectiveness of overpass.

As an embodiment of the present invention, the pier body 11 is hinged with the base 1 through a hinged support; one side of the base 1, which is far away from the bridge floor 13, is fixedly connected with an extension frame 2, one end of the extension frame 2, which is far away from the base 1, is rotatably connected with a winding drum 21, the winding drum 21 is driven by a speed reducing motor, and the speed reducing motor is connected with a power supply through a controller; a steel wire rope 22 is wound on the winding drum 21, and the other end of the steel wire rope 22 is connected with the part, close to the bridge deck 13, of the pier body 11; the steel wire rope 22 is wound through the winding drum 21, so that the pier body 11 is erected, and the installation efficiency of the viaduct is further improved; after base 1 installs and targetting in place, through controller start gear motor, gear motor drives reel 21 and rotates, reel 21 tightens up wire rope 22, and then make pier shaft 11 erect, after pier shaft 11 erects completely, link firmly pier shaft 11 and base 1 through welding equipment, strengthen pier shaft 11's stability, it erects to drive pier shaft 11 through reel 21, it is limited to make in the space, the position that large-scale hoisting equipment is difficult to enter the field can install the overpass fast, reduce the influence to road traffic in the overpass installation simultaneously, further improve the installation effectiveness of overpass.

As an embodiment of the invention, a roller 23 is rotatably connected to a part of the pier body 11 close to the platform 12, a pair of discs is fixedly connected to two sides of the roller 23, and pin holes 24 are uniformly formed in the circumference of each disc; a limiting frame 25 is fixedly connected to the pier body 11 at a position corresponding to the roller 23, a limiting hole 26 is formed in the limiting frame 25, and a limiting pin is inserted into the limiting hole 26 and the pin hole 24 to lock the roller 23; the steel wire rope 22 is wound on the roller 23 for a plurality of circles and then fixedly connected with the pier body 11 at the other side, and the steel wire rope 22 positioned between the two pier bodies 11 is arranged in a crossed manner, so that the stability of the bridge deck 13 and the pier bodies 11 is further enhanced; when the pier body 11 needs to be erected, a limit pin is inserted into the limit hole 26, the limit pin is fixedly clamped into the pin hole 24, the roller 23 is fixedly connected with the limit frame 25 at the moment, the steel wire rope 22 pulls the pier body 11, the pier body 11 is erected further, after the pier body 11 is completely erected and fixed with the base 1, the pin in the pin hole 24 is pulled out, one end, far away from the winding drum 21, of the steel wire rope 22 is fixedly connected with the opposite pier body 11, the steel wire rope 22 is tightened through the winding drum 21, then the pin is clamped into the pin hole 24 to complete fixing of the roller 23, the two pier bodies 11 are crossed to tension the steel wire rope 22, and stability of the bridge deck 13 and the pier bodies 11 is further improved.

As an embodiment of the invention, a splayed flared opening 17 is arranged at an opening of the bayonet 15, and the flared opening 17 is used for quickly aligning the clamping column 16 and clamping the clamping column into the bayonet 15, so that the stability of the bridge deck 13 and the pier body 11 is further enhanced; the clamping columns 16 can be conveniently and quickly embedded into the bayonets 15 through the flaring 17, so that the adjustment work of the base 1 together with the pier body 11 is reduced, and the installation efficiency of the viaduct is further improved.

As an embodiment of the invention, a set of cushion pads 27 made of special rubber is arranged between the top of the pier body 11 and the platform 12, and the cushion pads 27 are used for blocking the vibration of the bridge deck 13 and increasing the stability of the pier body 11; the buffer cushion 27 is embedded with a pair of limit baffles 28, the limit baffles 28 are fixedly connected with the platform 12 and the pier body 11 respectively, and the limit baffles 28 are used for preventing the platform 12 and the pier body 11 from excessively displacing, avoiding the bridge deck 13 from collapsing after dislocation and increasing the stability and safety of the viaduct; through blotter 27 elastic deformation absorption vibration energy when being compressed, and then on vibration transmission pier shaft 11 and base 1 that produces when reducing bridge floor 13 and bearing the vehicle, further increase pier shaft 11's stability, guarantee the security of overpass, through two limit baffle 28, can prevent that bridge floor 13 from being too big with pier shaft 11 displacement relative platform 12, avoiding bridge floor 13 excessive displacement, further increase the stability and the security of overpass.

As an embodiment of the invention, the periphery of the cushion pad 27 is wound with a steel rope 29, and the steel rope 29 is used for enhancing the bearing capacity of the cushion pad 27, reducing the plastic deformation of the cushion pad 27, further ensuring the elasticity of the cushion pad 27, and further increasing the stability and safety of the viaduct; the steel rope 29 is wound on the periphery of the cushion pad 27 to control the transverse deformation of the cushion pad 27, so that the bearing capacity of the cushion pad 27 is increased, the special rubber consumption of the cushion pad 27 is reduced, the purchasing cost of the viaduct is reduced, and the stability and the safety of the viaduct are further improved.

When the emergency viaduct works, the emergency viaduct is transported to a preset installation position, then the base 1 is fixed on the ground, then high-pressure hydraulic oil is introduced into the oil cylinder 14 through the oil pump, so that the oil cylinder 14 pushes the bridge deck 13 to rotate slowly, when the bridge deck 13 provided with the bayonet 15 is completely extended and kept horizontal, the oil cylinder 14 pushes the bridge deck 13 on the other side to rotate, when the clamping column 16 rotates to a position close to the bayonet 15, the clamping column 16 is clamped into the bayonet 15, so that the two bridge decks 13 are fixedly connected, the bridge deck 13 can be quickly installed in place, the use of large-scale hoisting equipment is saved, and the installation efficiency of the viaduct is improved; after the base 1 is installed in place, the speed reducing motor is started through the controller, the speed reducing motor drives the winding drum 21 to rotate, the winding drum 21 tightens the steel wire rope 22, the pier body 11 is erected, after the pier body 11 is completely erected, the pier body 11 is fixedly connected with the base 1 through welding equipment, the stability of the pier body 11 is enhanced, the winding drum 21 drives the pier body 11 to be erected, a viaduct can be installed quickly in a position where the space is limited and large hoisting equipment is difficult to enter, meanwhile, the influence on road traffic in the installation process of the viaduct is reduced, and the installation efficiency of the viaduct is further improved; when the pier body 11 needs to be erected, a limit pin is inserted into the limit hole 26, so that the limit pin is fixedly clamped into the pin hole 24, the roller 23 is fixedly connected with the limit frame 25, the steel wire rope 22 pulls the pier body 11, the pier body 11 is erected, after the pier body 11 is completely erected and fixed with the base 1, the pin in the pin hole 24 is pulled out, one end, far away from the winding drum 21, of the steel wire rope 22 is fixedly connected with the opposite pier body 11, the steel wire rope 22 is tightened through the winding drum 21, then the pin is clamped into the pin hole 24, the roller 23 is fixed, the steel wire rope 22 is tensioned between the two pier bodies 11 in a cross shape, and the stability of the bridge deck 13 and the pier body 11 is further improved; the clamping columns 16 can be conveniently and quickly embedded into the bayonets 15 through the flaring 17, so that the adjustment work of the base 1 together with the pier body 11 is reduced, and the installation efficiency of the viaduct is further improved; the vibration energy is absorbed through elastic deformation of the buffer cushions 27 when the bridge deck 13 is compressed, so that the vibration generated when the bridge deck 13 bears the vehicle is reduced and transmitted to the pier body 11 and the base 1, the stability of the pier body 11 is further improved, the safety of the viaduct is ensured, the bridge deck 13 can be prevented from excessively displacing relative to the platform 12 and the pier body 11 through the two limit baffles 28, the bridge deck 13 is prevented from excessively displacing, and the stability and the safety of the viaduct are further improved; the steel rope 29 is wound on the periphery of the cushion pad 27 to control the transverse deformation of the cushion pad 27, so that the bearing capacity of the cushion pad 27 is increased, the special rubber consumption of the cushion pad 27 is reduced, the purchasing cost of the viaduct is reduced, and the stability and the safety of the viaduct are further improved.

The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.