Valve conveying equipment
阅读说明:本技术 阀门输送设备 (Valve conveying equipment ) 是由 卢卡·马斯特拉里 劳伦佐·祖利安 菲利伯托·里蒙多 于 2018-12-10 设计创作,主要内容包括:一种用于输送气体的设备(10),具有一输送管(12),所述输送管(12)从一入口末端(13)延伸至一气体输送末端(14),沿着所述输送管(12)有一个接着一个相对于彼此进行协作的一入口组件(15)、一压力调节器(16)及一流速调节器(17),以便在每个状况下将一所需量的气体供应给被供给有气体或一空气/气体混合物的一设备的一燃烧器(11)。(An apparatus (10) for delivering gas, having a delivery pipe (12), which delivery pipe (12) extends from an inlet end (13) to a gas delivery end (14), along which delivery pipe (12) there is an inlet assembly (15), a pressure regulator (16) and a flow rate regulator (17) cooperating one after the other with respect to each other in order to supply a required amount of gas to a burner (11) of an apparatus supplied with gas or an air/gas mixture in each case.)
1. An apparatus for delivering gas to be supplied to at least one burner (11), said at least one burner (11) being located in an apparatus supplied with gas or an air/gas mixture, characterized in that: the gas delivery device (10) has a delivery pipe (12), the delivery pipe (12) extending from an inlet end (13) to a gas delivery end (14) to be presented one after the other along the delivery pipe (12)
An inlet assembly (15) having two electrovalves (18a, 18b) coaxial or separate from each other, said two electrovalves (18a, 18b) cooperating with at least one first aperture (19), said at least one first aperture (19) being present in said delivery pipe (12) and being maintained in a normally closed position by two corresponding supporting springs (20a, 20b), said electrovalves (18a, 18b) being able to be positioned in an open position in each case with respect to the action of at least one electric coil (21) associated with one or both of said electrovalves (18a, 18 b);
-a pressure regulator (16) provided with a shutter (22), said shutter (22) cooperating with a second aperture (23), said second aperture (23) being present in said delivery duct (12) and being connected to a first regulating membrane (24), said first regulating membrane (24) being able to define a regulating chamber (25), in said regulating chamber (25) an internal pressure equal to atmospheric pressure, said first regulating membrane (24) being also connected to a regulating spring (26), said regulating spring (26) being configured to define the pressure of said gas downstream of said second aperture (23) with respect to the compression force exerted on said regulating spring (26) by a mechanical correction device (27);
a flow rate regulator (17) comprising: a fixed body (34) fixed in the delivery pipe (12) and having a through hole (35); a mobile body (36) provided with a shutter portion (37), said shutter portion (37) being paired with said through hole (35) so as to define in each case a passage section of said gas with respect to the reciprocal position of said shutter portion (37) and of said through hole (35); and a second moving member (38) configured to position the shutter portion (37) at least between an open position and a partially closed position, in which the through hole (35) is open and partially closed by the shutter portion (37), respectively.
2. The apparatus of claim 1, wherein: the pressure regulator (16) comprises a second regulating membrane (30), the second regulating membrane (30) being connected to the shutter (22) and defining, with the first regulating membrane (24), a compensation chamber (31), the compensation chamber (31) being in fluid connection with the delivery duct (12) downstream of the second aperture (23) through a passage channel (32) present in the shutter (22).
3. The apparatus of claim 1 or 2, wherein: the mechanical correction device (27) comprises a first moving means (48), said first moving means (48) being configured to exert a compression force on the adjustment spring (26) to define the pressure of the gas downstream of the second aperture (23).
4. The apparatus of any of claims 1 to 3, wherein: the shutter portion (37) comprises a resilient tab (52), said resilient tab (52) being positionable in each case with respect to the through hole (35) by means of the second moving member (38), wherein the second moving member (38) comprises a lever (54), said lever (54) having a first extremity (55) and a second extremity (56), said first extremity (55) being positioned in contact with the resilient tab (52), said second extremity (56) being connected to a linear actuator (56), said linear actuator (56) being configured to position the lever (54) along a longitudinal axis (Z) of the lever (54) itself.
5. The apparatus of claim 4, wherein: the first end segment (55) of the lever (54) comprises a head (60), the head (60) being positioned in contact with the elastic flap (52), wherein the head (60) is offset with respect to the longitudinal axis (Z).
6. The apparatus of claim 4 or 5, wherein: an angle (a) is defined between the longitudinal axis (Z) and a plane tangent to the elastic flap (52) at a point where the elastic flap (52) is attached to the fixed body (34).
7. The apparatus of any preceding claim, wherein: the through-hole (35) of the fixing body (34) has at least one first portion (57) and at least one second portion (58), the at least one first portion (57) having a linear edge profile and the at least one second portion (58) having a tapered edge profile, wherein the first portion (57) and the second portion (58) are connected to each other by a connecting portion (59), the connecting portion (59) having an exponential edge profile.
8. The apparatus of any of claims 3 to 7, wherein: -operating said first moving means (48) and said second moving means (38) by means of a control and command unit (51) so as to be driven in a mutually coordinated manner so as to regulate the pressure and the delivery flow rate of said gas exiting from said delivery end (14).
9. The apparatus of any of claims 1 to 3, wherein: the second moving member (38) has a shaft (39), the shaft (39) being provided with a worm screw (40), and the mobile body (36) along at least a portion of its outer edge has a toothed sector (41), the toothed sector (41) being engaged with the worm screw (40), the mobile body (36) being configured to rotate about an axis of rotation (X) orthogonal to a lying plane of the through hole (35) with respect to the action of the second moving member (38).
10. The apparatus of any preceding claim, wherein: the first moving means (48) and/or the second moving means (38) comprise a moving means selected from the group consisting of a servo motor, a stepper motor (61), a linear and/or rotary actuator and a manually driven screw.
11. The apparatus of any preceding claim, wherein: the flow-rate regulator (17) comprises a sealing device (66), the sealing device (66) being configured to ensure the sealing of the second mobile member (38) to prevent the gas from leaking from a supply duct (12) to the external environment.
12. The apparatus of claims 4 and 11, wherein: the sealing means (66) comprise an annular gasket (67), said annular gasket (67) being configured to cooperate with the rod (54) to ensure a radial seal of the rod (54).
13. The apparatus of claim 12, wherein: the delivery duct (12) is at least partially closed upwards by an upper covering element (62), the shape of the upper covering element (62) defining a housing seating (64), the housing seating (64) being suitable for housing at least a lower portion (65a) of a housing casing (65) of the mobile member (38), and the annular gasket (67) being arranged inside the housing seating (64), the housing seating (64) being located between the covering element (62) and the housing casing (65).
14. The apparatus of claims 4 and 11, wherein: the sealing device (66) comprises a bellows gasket (69) made of a compressible and elastic material, a lower end (70) of the bellows gasket (69) being constrained to the stem (54) and an upper end (71) of the bellows gasket (69) being constrained to the upper covering element (62), and the bellows gasket (69) being configured to extend and contract as a function of an axial movement of the stem (54).
15. The apparatus of claim 14, wherein: the lower end (70) comprises a lower sealing ring (72), the lower sealing ring (72) projecting inwardly and being configured as a radial sealing element, and the rod (54) being provided with a seat (73), the seat (73) being adapted to receive and support the lower sealing ring (72).
16. The apparatus of claim 14 or 15, wherein: the upper end (71) comprises an upper sealing ring (74), the upper sealing ring (74) being configured as an axial seal which is compressed between the upper cover element (62) and the containment housing (65) during use.
Technical Field
The invention relates to a gas supply device for supplying a burner which is present in a gas supply device or which is supplied with an air/gas mixture.
By way of non-limiting example, the plurality of gas supply devices discussed herein may include a boiler, a water storage heater, a stove, an oven, a fireplace, or other similar or comparable device.
Background
It is known that gas supply apparatuses have high efficiency and sanitary combustion (hygieniccombustion) only when maintaining a correct composition of an air/gas mixture within an available heat flow rate range.
Some known gas delivery devices have a pressure regulator capable of defining a delivery pressure of the gas flowing from a delivery pipe towards a burner of the device supplied with gas or a defined air/gas mixture.
The pressure regulators generally have a shutter element associated with an aperture and configured to cooperate with a regulating membrane connected to a regulating spring, thereby defining the pressure of the gas downstream of the aperture.
The regulators provide that the pressure of the gas downstream of the shutter can be defined by placing a counterforce (constforce) of the regulating spring on the regulating membrane and thus on the shutter.
These known solutions provide that the operation of adjusting the pressure is performed by means of a mechanical correction device, possibly controlled by a step-by-step movement member acting on the adjustment spring and defining its load.
However, by acting on the load of the regulating spring by means of a correction device, making a regulation curve and thus obtaining a hygienic combustion requires the precise production of the components involved in the regulation, which makes its construction complex and expensive.
This problem is particularly acute in many instances of applications where an electronic combustion controller is used.
In fact, in such applications, a very high regulation field (defined as the ratio of a maximum delivery flow to a minimum delivery flow) is required, as well as a well-defined slope of the regulation curve over the entire operating range.
Known pressure regulators do not allow to obtain, at low flow rates, a precise development of the regulation of the characteristics of the outflowing gas according to an action of the command intended as an applied resistance, or number of steps of the step-by-step movement member.
It is also known that the delivery flow rate of the gas exiting from the pressure regulator is not linearly proportional to the reaction force exerted by the regulating spring on the regulating membrane.
Multiple sensors may also be used to determine multiple combustion characteristics that allow verification and adaptation of the effluent gas delivery by multiple indirect measurements, thereby achieving a sanitary combustion.
However, these sensors do not allow to obtain a fast and precise regulation of the outflow gas quantity, in particular when small quantities of gas have to be delivered, since in the latter case the reaction times of the sensors are long and increasingly unacceptable.
In this context, the above-mentioned aspects lead to the regulation of the delivered gas quantity becoming complicated and failing to dynamically adapt to the gas required in each case and/or possible changes in the air/gas ratio.
Accordingly, there is a need to perfect and provide a gas delivery device that overcomes at least one of the above-mentioned technical drawbacks.
The object of the present invention is to provide a gas delivery device which allows to deliver an accurate and required amount of gas according to in each case a plurality of requirements, the type of gas and the air/gas ratio required in each case, while at the same time ensuring a high performance and hygienic combustion over a wide range of heat flow rates.
It is another object of the present invention to provide a gas delivery apparatus that is capable of obtaining a regulation curve with an increasing slope at a low gas flow rate.
The applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
Disclosure of Invention
The invention is set forth and characterized in the independent claims, while a number of dependent claims describe a number of further characteristics of the invention or a number of variants of the main inventive concept.
In accordance with the various objects set forth above, the present invention is directed to an apparatus for delivering a gas having a delivery tube extending from an inlet end to a gas delivery end, along which are sequentially:
an inlet assembly having two electrovalves coaxial with or separate from each other, cooperating with at least a first aperture present in the delivery pipe and held in a normally closed position by two corresponding supporting springs, the electrovalves being positionable in an open position with respect to the action of at least one electrovalve coil associated with one or both of the electrovalves in each case;
a pressure regulator provided with a shutter cooperating with a second aperture present in the delivery duct and connected to a first regulating membrane able to define a regulating chamber in which an internal pressure is equal to atmospheric pressure, the first regulating membrane also being connected to a regulating spring configured to define the pressure of the gas downstream of the second aperture with respect to the compressive force exerted on the regulating spring by a mechanical correction device.
According to possible embodiments, the pressure regulator comprises a second regulation membrane connected to the shutter and defining, with the first regulation membrane, a compensation chamber in fluid connection with the delivery pipe downstream of the second aperture through a passage channel present in the shutter.
According to possible embodiments, the mechanical correction device comprises a moving member configured to exert a compression force on the adjustment spring to define the pressure of the gas downstream of the second aperture.
According to a characteristic aspect of the invention, the apparatus for delivering gas further has a flow-rate regulator located downstream of the pressure regulator, wherein the flow-rate regulator comprises:
the fixing body is fixed in the conveying pipe and is provided with a through hole;
a moving body provided with a gate portion paired with said through hole so as to define in each case a passage section of said gas with respect to the reciprocal position of said gate portion and said through hole; and
a moving member configured to position the gate portion at least between an open position and a partially closed position, wherein the through-holes are open and partially closed by the gate portion, respectively.
According to a plurality of possible solutions, the shutter portion comprises a flexible flap, for example a blade, which can be positioned with respect to the through hole of the fixed body to determine the passage section of the gas and therefore the delivery flow rate of the gas. The elastic tab is positioned by a moving member.
The moving means acting on the elastic tab may comprise a lever having a first end positioned in contact with the elastic tab and a second end connected to a linear actuator configured to position the lever along a longitudinal axis of the lever itself.
According to possible embodiments, the first end of the lever comprises a rod head positioned in contact with the elastic tab. The club head is offset relative to the longitudinal axis of the shaft.
The moving member acting on the elastic tab may be configured to allow the lever to rotate about the longitudinal axis of the lever itself.
The rotation of the lever, which is preferably manually driven in an assembly step, acts to correctly position the lever with respect to the elastic tab.
An angle is defined between the longitudinal axis and a plane tangent to the elastic flap at a point where the elastic flap is attached to the fixed body.
According to various possible embodiments, the through-hole of the fixing body may have a first portion with a linear edge profile and a second portion with a tapered edge profile, wherein the first portion and the second portion are interconnected by a connecting portion having a substantially exponential edge profile.
According to a number of possible embodiments, the first moving means associated with the pressure regulator and/or the second moving means associated with the flow-rate regulator comprise further motors, a linear and/or rotary actuator, and other moving means of similar or comparable type.
According to a number of possible variant embodiments, the first moving means and/or the second moving means may comprise an adjustment element of an electromagnetic or pressure type or other type.
According to possible solutions, the first moving means and the second moving means are operated by a control and command unit so as to be driven in a mutually coordinated manner, in order to regulate the pressure of the gas exiting from the delivery end and the delivery flow rate.
The control and command unit is configured to adapt the function of the first moving means and/or the second moving means with respect to the type of gas used.
According to possible embodiments, the second moving member has a shaft provided with a worm screw, and the mobile body has, along at least a portion of its outer edge, a toothed sector gear meshing with the worm screw, the mobile body being configured to rotate with respect to the second moving member about an axis of rotation orthogonal to a lying plane of the through hole.
According to another variant embodiment, the fixed body and the mobile body can have a tubular shape, for example a cylindrical shape.
In this case, the mobile body is coaxial with the fixed body and has a through hole which can be positioned with respect to the through hole of the fixed body, allowing the delivery of the gas.
Depending on the reciprocal position of the two through-holes, the flow rate of the conveyed gas is defined in each case.
According to this variant, the through hole of the mobile body can be positioned with respect to the through hole of the fixed body by means of a linear actuator or a rotary actuator.
According to a possible variant, an air/gas mixing device is connected downstream of the delivery end, said air/gas mixing device being provided with a fan capable of delivering the required amount of air in order to obtain in each case at an outlet a mixture having the required ratio of said air/gas.
Drawings
These and other features of the invention will become apparent from the following description of some embodiments, which is given as a non-limiting example with reference to the accompanying drawings, in which:
FIG. 1 schematically illustrates an apparatus for delivering gas in accordance with one possible embodiment of the present invention;
FIG. 2 is a cross-sectional view of an apparatus for delivering gas in accordance with one possible embodiment;
FIG. 3 is a cross-sectional view of a portion of an apparatus for delivering gas in accordance with a possible embodiment;
FIG. 4 is a view from above of a fixed body of a flow regulator of an apparatus for delivering gas;
FIG. 5 is a cross-sectional view of a detail of a flow regulator according to various possible embodiments;
FIG. 6 schematically shows the development of the characteristic flow rate versus upper command and how it is adjusted at low flow rates;
FIGS. 7 and 8 are two cross-sectional views of two apparatuses for delivering gas according to various possible embodiments of the present invention;
FIG. 9 is a view of a portion of FIG. 8;
FIG. 10 is an exploded view of a flow regulator of an apparatus for delivering gas in accordance with a possible embodiment of the present invention;
FIG. 11 is a cross-sectional view of a flow regulator according to various alternative embodiments described herein; and
FIG. 12 is a cross-sectional view of a detail of a flow regulator according to other embodiments described herein.
To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It should be understood that elements and features of one embodiment may be readily incorporated into other embodiments without further recitation.
Detailed Description
The embodiments described herein with reference to the figures relate to a
The various gas supply devices discussed herein include boilers, water storage heaters, stoves, ovens, fireplaces, or other similar or comparable devices, in which there is at least one
The
According to possible embodiments, the
Referring to fig. 3, the two
According to a plurality of possible embodiments, the two
The
The
According to a number of possible variants, the
According to possible embodiments, when the
In the case of two distinct and
The
The
The
This allows the use of a plurality of said
According to possible embodiments, a
The cartridge door 22 is connected to a first regulating diaphragm 24, the first regulating diaphragm 24 being able to define a regulating chamber 25, in which chamber 25 an internal pressure is equal to the atmospheric pressure.
The first regulation diaphragm 24 is also connected to a regulation spring 26, the regulation spring 26 being configured to define the pressure of the gas downstream of the second aperture 23 with respect to the compression force exerted on the regulation spring 26 by a mechanical correction device 27.
The regulating spring 26, the compressive force exerted on the regulating spring 26 by the mechanical correction device 27, and the atmospheric pressure in the regulating chamber 25 help to define the pressure of the gas downstream of the pocket door 22.
The mechanical correction device 27 may comprise an abutment 28, which abutment 28 may in each case be attached in a removable manner, for example by mechanical intervention, in a channel 29 of the
Depending on the position of the abutment 28, an abutment position of the pressure spring 26 and thus the force exerted by the adjustment spring 26 towards the first adjustment membrane 24 and the pocket door 22 can be defined.
According to various possible embodiments, the abutment 28 may be a socket wrench, a threaded nut, or other similar or comparable element that can be positioned, for example, by screwing/unscrewing with a tool, such as a screwdriver or other tool.
According to possible embodiments, the mechanical correction device 27 may comprise a first moving
The first moving
According to possible embodiments, the
The second regulation diaphragm 30 defines, together with the first regulation diaphragm 24, a compensation chamber 31, the compensation chamber 31 being in fluid connection with the
The passage channel 32 has two apertures 33a and 33b, the two apertures 33a and 33b allowing the
This configuration keeps the pressure of the gas downstream of the second aperture 23 constant, thanks to the force defined by the compression of the regulating spring 26, also maintaining the pressure of the gas in the compensation chamber 31, independently of the inlet pressure and of the pressure drop downstream of the flow-
According to an aspect of the invention, the
The
The flow-
According to possible embodiments, the
One end of the
According to possible embodiments, the
The
For example, the
The passage section of the gas through the through-
This embodiment not only simplifies the geometry of the flow-
The applicant has found that a well-defined regulation curve of the gas flow rate Q can be obtained according to an action of the position of the
An angle a is defined between the longitudinal axis Z of the
The applicant has found that, as the angle a increases, the development of the regulation curve of the gas flow rate Q varies according to an action of the command d, whether it be understood as an extension of the
In fig. 6, the arrows schematically show how the adjustment curve varies according to the angle α.
According to various possible embodiments, as shown in fig. 5, the contour of the through
A plurality of different profiles of the through-
The applicant has found that by reducing a radius of curvature of the profile of the through
According to possible embodiments, the through
The
According to a number of possible advantageous embodiments, the connecting
The applicant has found that by passing from a
According to possible embodiments, the
The
According to possible advantageous embodiments, a point of contact of the
According to some embodiments, the
According to possible embodiments, the
According to some embodiments, the
According to a number of possible variants, the
According to some embodiments, said
According to alternative embodiments, such as described with reference to fig. 11 to 12, the
According to these variants, the flow-
According to some embodiments, such as described with reference to fig. 11, the sealing
The
According to other embodiments, the
The bellows seal 69 is arranged to completely surround the
In fig. 12, by way of example, two possible positions of the
In a contracted position, the bellows seal 69 may have a plurality of creases that are stacked upon one another and collected in a package that tends to extend in the extended position.
According to some embodiments, a lower end 70 of the bellows seal 69 is constrained to the
According to some embodiments, the lower end 70 includes a lower sealing ring 72, the lower sealing ring 72 projecting inwardly and configured to act as a radial sealing element. The
According to some embodiments, the upper end 71 comprises an upper sealing ring 74, the upper sealing ring 74 being configured as an axial seal which is compressed between the
According to various variants, a thin guide sleeve 75 can also be provided, said thin guide sleeve 75 being shaped in such a way as to surround said
A further sealing ring 76 may also be provided between the guide sleeve 75 and a receiving structure of the
If the membrane breaks, an interference gap between the
According to a number of possible variant embodiments, such as described with reference to fig. 9 and 10, the
Preferably, said rotation of said
By rotating the
According to a number of possible embodiments, the second moving means 38 may comprise a manually driven screw.
According to possible embodiments, the second moving
According to a plurality of possible embodiments, the
According to a possible embodiment, the rotation axis X is substantially perpendicular to the axis of movement of the two
This configuration of the
Depending on the number of rotations (revolutions), the step of feeding, or also on the electric command signal of the second moving
This reciprocating position allows to define the flow rate according to the type of the gas. By adapting the reciprocating position in each case according to the type of gas, the required amount of gas can be supplied precisely.
According to possible embodiments, the flow-
The elastic urging body 42 is configured to exert an urging force on the moving
According to possible embodiments, the flow-
According to a variant, the elastic thrust body 42 is inserted into the cylindrical body 45 and cooperates with the cylindrical body 45 to define a thrust direction along which the elastic thrust body 42 acts.
According to various possible embodiments, the fixed
In other words, when the moving
According to another variant embodiment, not shown, the fixed
In this case, the
Depending on the reciprocal position of the two through-holes, the passage cross-section and thus the flow rate of the conveyed gas is defined in each case.
According to this variant, the through hole of the
According to a number of possible variants, an air/
According to possible solutions, the first movement means 48 and the second movement means 38 are commanded by a control and
The control and
According to a number of possible variants, the control and
The delivery flow rate and the pressure of the gas exiting the
According to a number of possible embodiments, the
One of the advantages of the present invention is that thanks to the
In fact, based on the type of gas, it is possible to define a specific force to be exerted on the regulation spring 26, and therefore a specific correction curve of the functional relationship to the flow of the outflowing gas.
Also, depending on the configuration of the through
In other words, the
In order to obtain the same result without the flow-
In other words, the invention allows to adapt the delivery with respect to the type of gas, without manual intervention by an operator.
Obviously, modifications and/or additions of parts may be made to the
It is also clear that, although the present invention has been described with reference to a number of specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of
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