阅读说明：本技术 一种立式单级管道离心泵 (Vertical single-stage pipeline centrifugal pump ) 是由 刘永周 张洁泓 于 2021-09-23 设计创作，主要内容包括：本发明涉及离心泵技术领域,具体为一种立式单级管道离心泵,包括管体,管体的顶部固定连接有连接架,连接架的顶部固定连接有电机,电机的输出轴固定连接有传动轴,传动轴上固定连接有泵叶,管体的底部固定连接有轴承,传动轴的底端插设在轴承内,管体的底部固定连接有垫平机构,垫平机构包括安装座,安装座固定连接在管体的底部。本发明通过使用垫平机构,可以实现对装置的四角较精准的调节高度,可以避免现有垫片规格较固定的不利因素,使装置在调节高度之后,再使用第二垫片和第一垫片卡进齿条上,垫平安装座的底部,使装置更精准更方便的矫平,通过使用缓冲机构,可以实现在传动轴晃动的时候,吸收传动轴上的动能。(The invention relates to the technical field of centrifugal pumps, in particular to a vertical single-stage pipeline centrifugal pump which comprises a pipe body, wherein the top of the pipe body is fixedly connected with a connecting frame, the top of the connecting frame is fixedly connected with a motor, an output shaft of the motor is fixedly connected with a transmission shaft, a pump blade is fixedly connected onto the transmission shaft, the bottom of the pipe body is fixedly connected with a bearing, the bottom end of the transmission shaft is inserted into the bearing, the bottom of the pipe body is fixedly connected with a flattening mechanism, the flattening mechanism comprises a mounting seat, and the mounting seat is fixedly connected to the bottom of the pipe body. According to the invention, the height of the four corners of the device can be accurately adjusted by using the cushion mechanism, the adverse factor that the specification of the existing gasket is fixed can be avoided, the device is clamped into the rack by using the second gasket and the first gasket after the height is adjusted, the bottom of the mounting seat is cushioned, the device is more accurately and conveniently leveled, and the kinetic energy on the transmission shaft can be absorbed when the transmission shaft shakes by using the buffer mechanism.)

1. The utility model provides a vertical single-stage pipeline centrifugal pump, includes body (1), top fixedly connected with link (2) of body (1), top fixedly connected with motor (3) of link (2), output shaft fixedly connected with transmission shaft (4) of motor (3), fixedly connected with pump leaf (5) on transmission shaft (4), bottom fixedly connected with bearing (25) of body (1), the bottom of transmission shaft (4) is inserted and is established in bearing (25), its characterized in that: the bottom of the pipe body (1) is fixedly connected with a flattening mechanism;

the flattening mechanism comprises a mounting seat (6), the mounting seat (6) is fixedly connected to the bottom of the pipe body (1), the mounting seat (6) further comprises flattening parts (601) arranged on two sides of the mounting seat (6), two groove positions (7) are symmetrically formed in corners of the flattening parts (601) on the two sides, gears (8) are connected in the groove positions (7) in a rotating mode, racks (9) are inserted in the groove positions (7) in a sliding mode, the gears (8) are meshed with the racks (9), a mounting box (10) is fixedly connected to one side of the flattening part (601) corresponding to the position of the gears (8), a first spring (11) is fixedly connected in the mounting box (10), an inserting strip (12) is fixedly connected to the bottom of the first spring (11), a sliding block (13) is fixedly connected to one side of the inserting strip (12), and the sliding block (13) slides on a side plate of the mounting box (10), the bottom fixedly connected with inserted block (14) of cutting (12), inserted block (14) joint is on gear (8).

2. A vertical single-stage pipe centrifugal pump according to claim 1, characterized in that: a first gasket (15) and a second gasket (16) are inserted on the rack (9), and the first gasket (15) is clamped in a tooth gap of the rack (9).

3. A vertical single-stage pipe centrifugal pump according to claim 1, characterized in that: fixedly connected with sleeve (17) on flat portion of pad (601), fixedly connected with second spring (18) in sleeve (17), the top fixedly connected with slide bar (19) of second spring (18), slide bar (19) slide and insert and establish in sleeve (17), the top fixed connection of slide bar (19) is on portion (101) and play water portion (102) of intaking.

4. A vertical single-stage pipe centrifugal pump according to claim 1, characterized in that: be provided with buffer gear in mount pad (6), the bottom of body (1) is extended and in extending to mount pad (6) to the bottom of transmission shaft (4), buffer gear includes the lantern ring (20), fixedly connected with third spring (22) in mount pad (6), third spring (22) interpolation is equipped with slide bar (21), slide bar (21) slide and insert and establish on mount pad (6), the one end fixed connection of slide bar (21) is on the lantern ring (20), one side fixedly connected with gasbag (30) of the lantern ring (20), the bottom of gasbag (30) is run through and is installed out oil pipe (23), the top that goes out oil pipe (23) extends to in the space of bearing (25), oil pipe (24) are installed to one side of gasbag (30).

5. The vertical single-stage pipe centrifugal pump according to claim 4, wherein: annular groove (201) have been seted up at the top of lantern ring (20), connecting pipe (26) are installed to the UNICOM on annular groove (201), the one end fixedly connected with oil storage bottle (27) of connecting pipe (26).

6. A vertical single-stage pipe centrifugal pump according to claim 5, wherein: one side fixedly connected with connection frame (28) of mount pad (6), fixedly connected with coil (29) in connection frame (28), slide bar (21) run through out mount pad (6) and extend to in coil (29).

Technical Field

The invention relates to the technical field of centrifugal pumps, in particular to a vertical single-stage pipeline centrifugal pump.

Background

Centrifugal pumps operate by causing water to move centrifugally as a result of the rotation of an impeller. Before the water pump is started, the pump shell and the water suction pipe are filled with water, then the motor is started, the pump shaft drives the impeller and the water to rotate at a high speed, the water is thrown to the outer edge of the impeller and flows into a water pressing pipeline of the water pump through a flow channel of the volute pump shell, the centrifugal pump is divided into a horizontal centrifugal pump and a vertical centrifugal pump, the floor area of the vertical centrifugal pump is small, and the centrifugal pump is more suitable for places with limited places.

In the prior art (publication number: CN110296084B), the invention discloses a vertical centrifugal pump, which comprises a pump body, a pump cover, a main pump shaft and a driving device, and is characterized in that: an impeller and an auxiliary pump shaft are arranged in an impeller cavity of the pump body, the impeller comprises a lower cover plate, an adjusting sleeve, blades and an upper cover plate, the blades are rotatably arranged on the upper cover plate, the inner end angles of the blades can be adjusted to penetrate through the adjusting sleeve, the auxiliary pump shaft is provided with a transmission groove which is in radial transmission fit with the adjusting sleeve, the lower end of the main pump shaft is in transmission fit with the upper end of the auxiliary pump shaft, and a movement limiting structure is arranged between the lower end of the auxiliary pump shaft and the lower end of the pump body; the upper cover plate is provided with a positioning cover, a positioning ring and a positioning table, the positioning ring is arranged on the periphery of the upper cover plate and is in press fit with the outer ends of the blades, the positioning cover can be arranged above the upper cover plate in a vertically moving mode and is driven by an auxiliary pump shaft, the lower end of the positioning cover is in press fit with the positioning ring, and a butterfly spring is arranged between the upper end of the positioning cover and the positioning table. The blade of the invention has adjustable installation direction and convenient adjustment.

The above patent provides an adjustment device for the pump shaft inside the pump body, but has the following disadvantages:

the pump shaft can rock in the course of the work, produces wearing and tearing to parts such as bearing, leads to the device to need frequent dismantlement maintenance, reduces the life-span of device, and at the device setting uneven, the rocking of pump shaft is more obvious and violent.

Therefore, a vertical single-stage pipeline centrifugal pump is provided.

Disclosure of Invention

The invention aims to provide a vertical single-stage pipeline centrifugal pump, which can realize accurate height adjustment of four corners of a device by using a flattening mechanism, avoid the adverse factor that the specification of the conventional gasket is fixed, clamp a second gasket and a first gasket onto a rack after the device is adjusted in height, flatten the bottom of an installation seat, more accurately and more conveniently flatten the device, and absorb kinetic energy on a transmission shaft when the transmission shaft shakes by using a buffer mechanism so as to solve the problems in the background art.

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

a vertical single-stage pipeline centrifugal pump comprises a pipe body, wherein the top of the pipe body is fixedly connected with a connecting frame, the top of the connecting frame is fixedly connected with a motor, an output shaft of the motor is fixedly connected with a transmission shaft, a pump blade is fixedly connected onto the transmission shaft, the bottom of the pipe body is fixedly connected with a bearing, the bottom end of the transmission shaft is inserted into the bearing, and the bottom of the pipe body is fixedly connected with a flattening mechanism;

the flattening mechanism comprises a mounting seat, the mounting seat is fixedly connected to the bottom of the pipe body, the mounting seat further comprises flattening portions arranged on two sides of the mounting seat, two groove positions are symmetrically formed in corners of the flattening portions, gears are connected in the groove positions in a rotating mode, racks are arranged in the groove positions in a sliding mode, the gears and the racks are meshed, one side of each flattening portion corresponds to a position fixedly connected with mounting box of the gear, a first spring is fixedly connected in the mounting box, an inserting strip is fixedly connected to the bottom of the first spring, a sliding block is fixedly connected to one side of the inserting strip, the sliding block slides on a side plate of the mounting box, an inserting block is fixedly connected to the bottom of the inserting strip, and the inserting block is connected to the gears in a clamped mode.

When the device was installed, at first through the angle of spirit level side mounted position, stir the sliding block upwards after that, with the slip rebound, make the inserted block leave the gear, after that the running gear will stretch out downwards with gear engagement's trench, and the length that stretches out through the trench of adjusting four corners to reach the angle of adjusting device integral erection, and this kind of regulative mode is convenient and fast more.

Preferably, a first gasket and a second gasket are inserted on the rack, and the first gasket is clamped in a tooth gap of the rack.

After the slot position is stretched out, the first gasket is inserted into the tooth gaps of the slot position, and one or more second gaskets are used for filling gaps between the first gasket and the mounting seat and between the first gasket and the ground, so that the error generated by the gasket only using one standard gasket is reduced, and the effect of the gasket is further improved.

Preferably, the flattening portion is fixedly connected with a sleeve, a second spring is fixedly connected in the sleeve, a sliding rod is fixedly connected to the top of the second spring, the sliding rod is slidably inserted in the sleeve, and the top of the sliding rod is fixedly connected to the water inlet portion and the water outlet portion.

When the device is in operation, the second spring can absorb radial vibration generated by impact of water flow or motor vibration through the slide bar, so that the influence of vibration on the transmission shaft is reduced, the shaking of the transmission shaft is reduced, and the influence of the shaking of the transmission shaft on the bearing is further reduced.

Preferably, be provided with buffer gear in the mount pad, the bottom of body is extended and in extending to the mount pad to the bottom of transmission shaft, buffer gear includes the lantern ring, fixedly connected with third spring in the mount pad, the interpolation of third spring is equipped with the slide bar, the slide bar slides and inserts and establish on the mount pad, the one end fixed connection of slide bar is on the lantern ring, one side fixedly connected with gasbag of the lantern ring, the bottom of gasbag is run through and is installed out oil pipe, the top that goes out oil pipe extends to in the space of bearing, oil pipe is installed to one side of gasbag.

When the transmission shaft bottom produces and rocks, the transmission shaft passes through lantern ring extrusion third spring and gasbag, the kinetic energy that produces during the transmission shaft rocks is then absorbed to third spring and gasbag, reduce the range that the transmission shaft rocked, further reduce the influence that the transmission shaft rocked the production, fill lubricated liquid to the gasbag through advancing oil pipe in the gasbag, when the gasbag receives the extrusion, gasbag internal pressure increases, lubricated liquid in the gasbag then can be extruded near the bearing, and then when the transmission shaft rocks, the rotation of bearing receives the lubrication, can reduce the transmission shaft and rock the damage that the back bearing received.

Preferably, the top of the lantern ring is provided with an annular groove, the annular groove is communicated with a connecting pipe, and one end of the connecting pipe is fixedly connected with an oil storage bottle.

When the lubricating oil that the gasbag pumped is more, more lubricating oil can flow to the ring channel in to connecting pipe flow direction oil storage bottle through connecting on the ring channel, thereby collect unnecessary or the lubricating oil that spills over, make lubricating oil can the reutilization.

Preferably, one side fixedly connected with connecting frame of mount pad, fixedly connected with coil in the connecting frame, the slide bar runs through out the mount pad and extends to in the coil.

When the third spring receives the extrusion, the slide bar can slide out of the mount pad under the extruded effect, and insert in the coil, the coil is when the circular telegram, inside produces great magnetic field, and when the mount pad passed the magnetic field of coil, will produce induced-current in the mount pad, and kinetic energy will be absorbed by the part, and the damping force and the speed direct ratio that the mount pad received, and then the transmission shaft rocks more fast, and the degree that the transmission shaft was slowed down is just bigger.

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

1. according to the invention, the height of the four corners of the device can be accurately adjusted by using the cushion leveling mechanism, and the cushion leveling mechanism is matched with the first gasket and the second gasket, so that the adverse factor that the specification of the conventional gasket is fixed can be avoided, the second gasket and the first gasket are clamped into the rack after the height of the device is adjusted, and the bottom of the mounting seat is leveled, so that the device is more accurately and conveniently leveled.

2. The invention can absorb the kinetic energy on the transmission shaft when the transmission shaft shakes by using the buffer mechanism, and can quickly absorb the kinetic energy of the transmission shaft by matching the sliding rod and the electrified coil and utilizing the magnetic field in the coil, thereby reducing the shaking amplitude of the transmission shaft and further reducing the abrasion caused by the shaking of the transmission shaft.

3. The invention can realize that lubricating oil is added into the air bag by using the air bag in the buffer mechanism, and when the air bag is extruded by the transmission shaft, the lubricating oil is pumped to the bearing, thereby reducing the damage of the bearing in the shaking of the transmission shaft, and the overflowing lubricating oil is collected by matching with the annular groove, thereby increasing the utilization rate of the lubricating oil.

Drawings

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is a top view of the mount of the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;

FIG. 4 is an enlarged view of the invention at b in FIG. 1;

fig. 5 is an enlarged view of the invention at c in fig. 1.

In the figure: 1. a pipe body; 101. a water inlet part; 102. a water outlet part; 2. a connecting frame; 3. a motor; 4. a drive shaft; 5. a pump blade; 6. a mounting seat; 601. a cushion portion; 7. a slot position; 8. a gear; 9. a rack; 10. mounting a box; 11. a first spring; 12. cutting; 13. a slider; 14. inserting a block; 15. a first gasket; 16. a second gasket; 17. a sleeve; 18. a second spring; 19. a slide bar; 20. a collar; 201. an annular groove; 21. a slide bar; 22. a third spring; 23. an oil outlet pipe; 24. an oil inlet pipe; 25. a bearing; 26. a connecting pipe; 27. an oil storage bottle; 28. a connecting frame; 29. a coil; 30. an air bag.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and 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 considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, the present invention provides a vertical single-stage pipeline centrifugal pump, which has the following technical scheme:

a vertical single-stage pipeline centrifugal pump comprises a pipe body 1, wherein the top of the pipe body 1 is fixedly connected with a connecting frame 2, the top of the connecting frame 2 is fixedly connected with a motor 3, an output shaft of the motor 3 is fixedly connected with a transmission shaft 4, a pump blade 5 is fixedly connected onto the transmission shaft 4, the bottom of the pipe body 1 is fixedly connected with a bearing 25, the bottom end of the transmission shaft 4 is inserted into the bearing 25, and the bottom of the pipe body 1 is fixedly connected with a flattening mechanism;

flat-bed machine constructs including mount pad 6, 6 fixed connection of mount pad is in the bottom of body 1, mount pad 6 is still including setting up the flat portion 601 of pad in 6 both sides of mount pad, two trench 7 have been seted up to the equal symmetry of flat portion 601 corner of pad of both sides, trench 7 internal rotation is connected with gear 8, it is equipped with rack 9 to slide to insert in trench 7, gear 8 and rack 9 mesh, the one side of flat portion 601 of pad corresponds gear 8's fixed position connecting with mounting box 10, first spring 11 of fixedly connected with in the mounting box 10, the bottom fixedly connected with cutting 12 of first spring 11, one side fixedly connected with sliding block 13 of cutting 12, sliding block 13 slides on a curb plate of mounting box 10, the bottom fixedly connected with inserted block 14 of inserted block 12, the joint of inserted block 14 is on gear 8.

When the device was installed, at first through the angle of spirit level side mounted position, stir sliding block 13 upwards after that, with the slip 12 rebound, make inserted block 14 leave gear 8, rotate gear 8 after that, will stretch out downwards with gear 8 engaged trench 7, and the length that stretches out through trench 7 of adjusting four corners to reach the angle of adjusting device integral erection, and this kind of regulative mode is convenient and fast more.

Referring to fig. 3, a first washer 15 and a second washer 16 are inserted into the rack 9, and the first washer 15 is engaged with the tooth gap of the rack 9.

After the slot position 7 extends out, the first gasket 15 is inserted into the tooth gap of the slot position 7, and one or more second gaskets 16 are used for filling gaps between the first gasket 15 and the mounting seat 6 and between the first gasket 15 and the ground, so that the error generated by only one standard gasket is reduced, and the effect of the gasket is further improved.

Referring to fig. 1, as an embodiment of the present invention, a sleeve 17 is fixedly connected to a flat portion 601, a second spring 18 is fixedly connected to the inside of the sleeve 17, a slide rod 19 is fixedly connected to the top of the second spring 18, the slide rod 19 is slidably inserted into the sleeve 17, and the top of the slide rod 19 is fixedly connected to the water inlet portion 101 and the water outlet portion 102.

When the device is in operation, the second spring 18 can absorb radial vibration generated by impact of water flow or vibration of the motor 3 through the sliding rod 19, so that the influence of vibration on the transmission shaft 4 is reduced, the shaking of the transmission shaft 4 is reduced, and the influence of the shaking of the transmission shaft 4 on the bearing 25 is further reduced.

Referring to fig. 4, as an embodiment of the present invention, a buffering mechanism is disposed in the mounting seat 6, a bottom end of the transmission shaft 4 extends out of a bottom of the pipe body 1 and extends into the mounting seat 6, the buffering mechanism includes a collar 20, a third spring 22 is fixedly connected in the mounting seat 6, a sliding rod 21 is inserted in the third spring 22, the sliding rod 21 is slidably inserted in the mounting seat 6, one end of the sliding rod 21 is fixedly connected to the collar 20, an air bag 30 is fixedly connected to one side of the collar 20, an oil outlet pipe 23 is installed at a bottom of the air bag 30 in a penetrating manner, a top end of the oil outlet pipe 23 extends into a gap of the bearing 25, and an oil inlet pipe 24 is installed at one side of the air bag 30.

When the bottom of transmission shaft 4 produces and rocks, transmission shaft 4 passes through lantern ring 20 extrusion third spring 22 and gasbag 30, third spring 22 and gasbag 30 then absorb the kinetic energy that transmission shaft 4 rocked in the production, reduce the range that transmission shaft 4 rocked, further reduce the influence that transmission shaft 4 rocked the production, fill lubricated liquid to gasbag 30 intussuseption through advancing oil pipe 24 in the gasbag 30, when gasbag 30 received the extrusion, gasbag 30 internal pressure increases, lubricated liquid in the gasbag 30 then can be extruded near bearing 25, and then when transmission shaft 4 rocked, bearing 25's rotation receives the lubrication, can reduce transmission shaft 4 rocks the damage that back bearing 25 received.

Referring to fig. 2 and 4, in an embodiment of the present invention, an annular groove 201 is formed at the top of the collar 20, a connection pipe 26 is installed on the annular groove 201 in a communicating manner, and an oil storage bottle 27 is fixedly connected to one end of the connection pipe 26.

When the air bag 30 pumps more lubricating oil, more lubricating oil flows into the annular groove 201 and flows to the oil storage bottle 27 through the connecting pipe 26 connected to the annular groove 201, so that the excessive or overflowed lubricating oil is collected, and the lubricating oil can be reused.

Referring to fig. 1 and 5, as an embodiment of the present invention, a connection frame 28 is fixedly connected to one side of the mounting seat 6, a coil 29 is fixedly connected to the inside of the connection frame 28, and the slide rod 21 penetrates the mounting seat 6 and extends into the coil 29.

When the third spring 22 is extruded, the sliding rod 21 slides out of the mounting seat 6 under the extrusion effect and is inserted into the coil 29, when the coil 29 is powered on, a large magnetic field is generated inside the coil 29, when the mounting seat 6 passes through the magnetic field of the coil 29, induced current is generated in the mounting seat 6, the motion energy is partially absorbed, the damping force received by the mounting seat 6 is in direct proportion to the speed, and further, the transmission shaft 4 is faster to shake, and the degree of deceleration of the transmission shaft 4 is larger.

The working principle is as follows: when the device was installed, at first through the angle of spirit level side mounted position, stir sliding block 13 upwards after that, with the slip 12 rebound, make inserted block 14 leave gear 8, rotate gear 8 after that, will stretch out downwards with gear 8 engaged trench 7, and the length that stretches out through trench 7 of adjusting four corners to reach the angle of adjusting device integral erection, and this kind of regulative mode is convenient and fast more.

When the bottom of transmission shaft 4 produces and rocks, transmission shaft 4 passes through lantern ring 20 extrusion third spring 22 and gasbag 30, third spring 22 and gasbag 30 then absorb the kinetic energy that transmission shaft 4 rocked in the production, reduce the range that transmission shaft 4 rocked, further reduce the influence that transmission shaft 4 rocked the production, fill lubricated liquid to gasbag 30 intussuseption through advancing oil pipe 24 in the gasbag 30, when gasbag 30 received the extrusion, gasbag 30 internal pressure increases, lubricated liquid in the gasbag 30 then can be extruded near bearing 25, and then when transmission shaft 4 rocked, bearing 25's rotation receives the lubrication, can reduce transmission shaft 4 rocks the damage that back bearing 25 received.

When the third spring 22 is extruded, the sliding rod 21 slides out of the mounting seat 6 under the extrusion effect and is inserted into the coil 29, when the coil 29 is powered on, a large magnetic field is generated inside the coil 29, when the mounting seat 6 passes through the magnetic field of the coil 29, induced current is generated in the mounting seat 6, the motion energy is partially absorbed, the damping force received by the mounting seat 6 is in direct proportion to the speed, and further, the transmission shaft 4 is faster to shake, and the degree of deceleration of the transmission shaft 4 is larger.

The electric elements in the document are electrically connected with an external main controller and 220V mains supply through a transformer, the main controller can be a conventional known device controlled by a computer and the like, the product model provided by the invention is only used according to the structural characteristics of the product, the product can be adjusted and modified after being purchased, so that the product is more matched with and accords with the technical scheme of the invention, the product model is a technical scheme of the optimal application of the technical scheme, the product model can be replaced and modified according to the required technical parameters, and the product model is familiar to the technical personnel in the field, so that the technical scheme provided by the invention can clearly obtain the corresponding use effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.