CA2085747C - Modular pneumatic control systems - Google Patents
Modular pneumatic control systemsInfo
- Publication number
- CA2085747C CA2085747C CA 2085747 CA2085747A CA2085747C CA 2085747 C CA2085747 C CA 2085747C CA 2085747 CA2085747 CA 2085747 CA 2085747 A CA2085747 A CA 2085747A CA 2085747 C CA2085747 C CA 2085747C
- Authority
- CA
- Canada
- Prior art keywords
- fluid
- control apparatus
- wall
- passage
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0832—Modular valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0821—Attachment or sealing of modular units to each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0871—Channels for fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0878—Assembly of modular units
- F15B13/0885—Assembly of modular units using valves combined with other components
- F15B13/0892—Valves combined with fluid components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0878—Assembly of modular units
- F15B13/0896—Assembly of modular units using different types or sizes of valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Housings (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A fluid module (33) for a fluid control apparatus (30) which has an internal flu id operated diaphragm (95) which will permit the manifolding of several modules (31, 32 and 33) together. Each of the modules is of the same configuration and is interconnected to a common main fluid supply source (29). The modular units are plugged together using couplings (40) with the main fluid source piped only to one device (33) with an internal fluid passage (34), (34') and (34") delivering the fluid to all of the modular units. The modular units can be connected in a series of parallel combin ation with respect to signaling fluids. The modular units eliminate the cost of interconnecting different units at a variety of loca tions with different couplings as well as independently supplying each unit with a supply fluid.
Description
?,j5~ s r~ ;7J~
MODULAR PNEUMATIC CONTROL SYSTEMS
This invention relates to modular pneumatic controls, and particularly, modular units which are all of the same configuration so that they can be interconnected using the same fittings thus obviating specialized modular units and fittings as presently employed in the prior art.
The manifolding oE pneumatic control devices is well known. For example, U. S. patents 4,0939329; 4,095,863 and 4,095,864 illustrate the need for a separate manifold device on which the control de~ices are pla~ed. In particular, the '329 and the '864 patents show that di:fferent types of co~trol devices or manifold units are employed in a control ~ystem. U. 5. patent 4,245,5~9 describes a control device with a ~diaphragm stack wherein the internal functions are similar to that employed in the modular unit of this~:invention. ~owever, it is not capable of interconnection in the manner hereinafter : ~ descrlbed. In U. S. patent 4,027,692 lo~ic modules are shown which are presented in a cascade form and are ~ : em,ployed for controllin~ machines by pneumatic means.
: ~ a'ch one of the modular units has different input~
: a~so~iated with it as well as~requiring a diffcrent unit : : referred to as a connecting unit. ~ :
While the prior~ art control units af~ord a means of manifolding several control units into a system, they do not afford a simplified modular control unit:wherein each :
: : ' :~:
~ .
.
. ~ .
unit is of the same configuration and can be interconnected to a common Eluid input source.
It is an advantage of the present invention to provide aa improved pneumatic control device wherein all of the devices are of the same geometric configuration.
It is another advantage of this invention to provide a pneumatic control device wherein all of the connections to the devices are o~ the same type, the same size and are located at the same locations.
It is yet another advantage of the invention to provide a modular control unit of the foregoing type wherein the modular units are plugged together using couplings with the main air piped to only one device and internal air passages delivering the air to all of the other modular units.
It is still another advantage of the invention to provide a modular unit of the foregoing type wherein any series or parallel combination of signalling air can be employed.
Other advantages are a modular control unit wherein the housing can accommodate a multiplicity of control functions yet can be produced with a minimum cost and assembly procedures.
The fore~oing advantages are accomplished and the shortcomingg of the prior art are overcome by the presen~
pneumatic control device wherein a module is provided by a body member having two substantially identi~al wall members which are arran~ed opposite each other. There is a cavity in each body member with a fluid regulator means in the cavityO A fluid passage extends from a first wall to an opposing second wall~ A first fluid input passage extends between the second wall and a third wall, and a fluid output passage extends between the first wall and the third wall, with all of the fluid passages communicating with the cavityc In one aspect, all of the .
~ ~.
_3_ fluid passages are constructed and arranged to selec-tively receive identical fluid connection means or plug means.
In one preferred embodiment, there i3 at least one additional ~1uid module identical to a first module.
Pluid connection means interconnect the fluid passages between the first and second walls of said modules, There are plug means for insertion into said first fluid pas~age and the first fluid input passage at a second wall of one of the additio~al fluid modules and for insertion into the fluid output passage at the first wall of said first module. There are additional plug and fluid connection means for selective insertion into the first fluid input and the output passages at the first, second and third walls of the modules.
In other preferred embodiments, the fluid passages are pneumatic fluid passages; the fluid re~ulator means is provided by a diaphragm disposed in the cavity for ::
contact with a valve member, and the cavity receives one : 20 or more diaphragms without modification of the body member.
Ir. still another preferred embodiment, the modules are formed from cubic body members with a fluid passage extending through the body member in a linear manner, and the fluid input and ou~put passag~s also communicate with the exterior of the body member through an additional : connecting wall surface.
Fig. 1 is a diagrammatic view illustrating a typical prior art pneumatic con~rol system.
Fig. 2 is a diagrammatic view illustrating the fluid control apparatus of the present invention.
Fig. 3 is a perspective view showing two of ~he modules of the present invention for lnterconnection.
~ig. 4 is a sectional view taken along line 4-4 of .35 Fig. 3 but with the two modules in an ass~mbled condition.
. ' : : . , , ' ' ' ., ~ , ' :: ' .
' :~/f ~ q~ l S .'~ ~1 .~ i ' :!,~. i _ 7~'l A t ~ ,~
Fig. 5 is a view in~.vertical section taken along line 5-5 of Fig. 4.
Fig. 6 is a view in vertical section illustrating one of the modules of the present invention taken along line 6-6 of Fig. 3.
Fig. 7 is an assembly view o~ the module shown in Fig. 6.
Fig. 8 is a view similar to Fig. 6 illustrating an additional embodiment of the module.
Fig. 9 is a view in horizontal section of the module shown in Fig. 6 taken along line 9-9 of Fig. 6.
~ ig. 10 is a top plan view of the module shown in Fig. 6 with a portion shown in cross section.
Referring to Fig. 1, a typical prior art pneumatic control apparatus i~ shown generally at 10. It includes three modular pneumatic control devices 11, 12 and 13 which in normal practice has different geometric configurations. The usual main air is supplied independently to the openings 14, ].4' and 14", through the main air line 17. Each of the units will have fluid input passages 15, 15' and 15" as well as output passages 16, 16' and 16". It is recognized that within each of the modules there is some type of ~egulator means which is responsive to the input signal such as through line 18 to activate the regulator means in the unit so that at a predetermined pressure level an output of air will exit from the output 16 and is transferred to the conduit 22. Conduit 22 in turn is interconnected to the input opening 15' of unit 12. A further signal is generated from device 12 through the output opening 16' and through the line 20. The device 13 is not interconnected to the devices 11 or 12. Input and output signals are conveyed by the input line 13 and output line 21 when connected to the respective input opening 15" and the output opening 16". It will be recognized that in the prior art con-struction there is utilized different configurations of the control devices which require a multiplicity of , ~. ' , ' ' ' ' . . , . , . - . , .
,': .' ', - ~ , :,' ., ' , - - ~, . . .
different interconnecting fittings such as the main air line 17, the inlet lines 18 and 19 as well as the interconnectiny line 22 and the outlet lines 20 and 21.
In contrast to the system shown in Fig. 1~ is the modular fluid control apparatus of this invention which is shown generally at 30 in ~ig. 2. The fluid control apparatus 30 includes three identical devices 31, 32 and 33 which are of a cubic construction. As each of the units has essentially the same passages therethrough, only the ones shown in conjunction with the device 31 are described at this stage in detail with the others having the same numbers only they are "primed" or "double -primed"~ Referring specifically to modular device 31, it has a main air conduit 34 which extends linearly from the first side 31r to a second side 311. The conduit 34 terminates in openings 34a and 34b for receiving, for example, a plu~ 41 and a coupling 40, respectively. An L-shaped inlet passage 35 also communicates with the second side 311 through the orifice 35a and to a third side 31t by the orifice 35b. An ~-shaped outlet passage 36 cr Inicates with the first side 31r through the orifice 36a and to the third side 31t by the orifice 36b. As is seen in Fig. 2, the main air conduits 34, 34' and 34" are interconnected by the couplings 40 and with a main air supply indicated at 29~ The ve~atility of the devices is shown in Fig. 2 where, for example, a variety of input and output co~duits 37 and 38, respectively, are connec~ed to their respective inlet and outlet passages of the devices. Those passages which are not utilized~0 are provided with plugs 41. In this manner and, for le, in conjunction with device 33, an input signal is provide~ ~y the inlet line 37 and an outlet signal is provided by the outlet conduit 38. This provides a parallel connection.- However, in conjunction with devices 31 and 32, these are interconnected in a series manner with the inlet conduit 37 connected to the inlet passage 35, wherea~ the outlet conduit 38 is connected to ' . : :
~ 7 ~ J 7 .L~ ~ r: J~7<~ 7Y ~
the outlet passage 36' and the outlet passage 36 and inlet passage 35' being closed by the plugs 41. As later described in more detail, device 33 inlet passage 35" and outlet passage 36" communicate with an internal regulator means as does main air conduit 34".
Referring specifically to Figs~ 3, 4 and 5, there it is illustrated the ease of interconnecting modular devices 31 and 33 for example. Each of the units has two projecting connectors 43 and 43a which extend frcm opposing lower and upper back sides. Each of the connectors 43 and 43a has a "T"-shaped recess 48 to receive, for example, a screw for mounting the devices to a mounting plate or board. ~hen mounted, the connectors and screws will be covered by insertion into an opening such as 44" in the device 33. It will be understood that not both of the connectors need be utilized for attachment as these units are made in a symmetrical manner. To make certain that the units are assembled in the proper manner, it will be noted that there are 20 locating pegs such as 46, 46" and 46a" ~See Fig. 6).
These will fit into corresponding openings such as 39 and 39' in an opposing unit. In order to assure proper orientation and as will best be seen in conjunction with Fig. 6, peg 46" is square whereas peg 46a" is round for fi~ting into round and square open.ings at the top and bottom, respectively.
~ eferring specifically to Figs. 6 and 7, a typical fluid regulator means is shown inside the device 33 and 133. As seen in Fig. 6, device 33 has a cavity 50 which houses a bottom plate 52 as well as a retainer plate 53, and diaphragm plates 54 and 55 for housing diaphragms 92, 93 and 94 as well as stack plates 64 and 65. These form a diaphragm stack generally 95 which will move in the cavity 50 in response to various pressures or vacuum conditions, as is well known in the art (see, for example, U. S. patent 4,245,549). A combination supply and exhaust mushroom shaped valve 56 is biased by the :~
:, .
, ,, ...... , ~ ~ .
.. - : . . . . ... . .
~ ,, - ~ - : ~ ~ .. :: . , . :
, - , .
: '" ' .', '-,, ' ' ' ~ '' '' . ... ~ . : -. .. .
r ~ ??~
spring 59 positioned on the pcst 58 for seating against supply valve seat 57. As best seen in ~ig. 7, the val~e has a small diameter portion 56a for sealing against a second valve seat 81a in a spring retainer 81 which serves as an exhaust valve. A spring 61 is positioned between the retainer 81 and the plate 62 to urge the diaphragm stack 95 upwardly. The stack 95 including the stack plates 64 and 65 are secured to the diaphragms 92, 93 and 94 by the screw 78 and washer 79 which fit into the threaded portion 81b of the retainer 81. There is also a spri~g 66 for urging the diaphragm stack 95 downwardly. It i5 engaged by the threaded adjustment nut 69 at one end and with the retainer 80 at the opposing end. A threaded stem 70 engages the adjustment nut 69 for this purpose and is rotatably captured in the neck 77. As best seen in Fig. 6, a portion of the spring 66 is accommodated in the neck 77 of the device 33 as is the adjustment nut 69 and the threaded stem 70. The turning of the threaded stem 70 by means o:E the slotted head 70a adjusts the tension on the spring 66, and accordingly the tension on the diaphra~m stack 95. Referring back to Fig. 7, it is seen that the dial kllob 68 is secured to the stem 70 by the screw 51. Rotation of the dial knob 68 is limited by the stop 67 riding in the groove 68a which will have a stop surface (not shown). An indicator dial ring 85 is positioned adjacent the knob 68.
Fig, 75 9 and 10 illustrates ~he interconnection of the plate members 52-55 inside the device 33. This is effected by eight screws 82 which extend through the plates as w~11 as through the screw holes 33s in the body 47. For this purpose, there are accommodating nut well 91 in the upper surface of the body 33b to accommodate the nuts 83 attached to the screws 82. A gasket 84 is positioned between plates 53 and 52.
Fi~s. 6 and 9 further illustrate communication in the device 33 by the input and output signals as well as the main air supply. Inlet passage 35" allows ~ .
~ , , , . _ pressurized signal air to enter through passages 86 and 73 to effect a.downward movement of the diaphragm stack 95. This effects an opening of the valve 56 which in turn allows air from the main air supply in main air eonduit 34" to flow through passage 89 to supply valve seat 57 and flow outwardly through passages 74 and 88 to outlet passage 36" in a manner well known for this device. Referring specifically to Fig~ 9, it is seen that there are additional inlet passages 39 and 42 in the body 47 conneoting with passages 87 and 90, respec-tively. These extend downwardly into the body 47 for introducing secondary and tertiary inputs to the diaphragm stack 95. Central cavity portion 33C
accommodates the spring 66 and the associated retainer 80 as previously explained.
An alternative embodiment is shown generally at 133 in Fig. 8. Similar components are designated with the same numbers as referred to in ~onjunction with unit 33 except they are indicated in the "100 series". A
difference between unit 33 and 133 is the fact that there are additional diaphragms 196 and 197 as well as plates 160, 163 and stack plates 167 and 175. This provides additional co~trol chambers as represented by the numerals 198-202. As stated earlier, the use of the movable diaphragm stack 195 to e~fect a control function in the modular device 133 is well known in the art.
~asically, a siqnal in the form of pressurized signal air such as would be introduced from inlet passage 135" and passages lB6 and 173. From passa~e 173 it enters a control chamber such as 199. This signal air in conjunction with other sig~al air introduced into other chambers such as 198 can oause a pressure differential acting across the diaphram 193. This can cause diaphragm stack 195 to move downwardly and valve 156 to be moved of~ seat 157 to thereby allow supply air from the main air conduit 34" to be released as an output through passage~ 174, 188 and outlet pas~age 136". An exhaust ~ :
. : . ' : :
:
~ . :
.. ' : ' ' .. :
. : ' ~: . ~ ' . .
.
~ : . . . :
function is effected by output air passing throuyh passage 174 and on diaphragm 194 to effect an upward movement on the diaphragm stack 195 with movement of valve 156 away from valve exhaust seat 181a.
With reference to Fig. 10, it is seen that there are --crescent shaped passages 35w which extend from the top surface of device 33 to the inlet passages such as 35".
These provide windows to observe whether there is an interconnecting coupling 40 placed between devices 33 and 32. If desired, the coupling 40 could have an inter-connecting extension which would fit between two adjacent windows to allow placement o~ a pressure gauge.
Additional screw holes 35h are also provided to allow placement of a name plate as seen at 45 in Fig. 3 or a cover plate in those instances where a dial knob is not employed.
The preferred material for composing the bodies of the devices 31-33 is rigid molded plastic. ~owever t other suitahle ma~erials would be die cast aluminum.
Inlet and outlet conduits 37 and 38, as well as couplings 40 and plugs 41 are composed of flexible molded plastic. Other materials such as rubber could be substituted.
It will thus be seen from the previous description, that there is now provided a modular pneumatic control device which is composed of a basic unit that can be interconnected in various manners so as to prsvide a wide variety of functions. Substantial cost savings is effected in that each cell or modular unit is the same, thus eliminating the expense of interconnecting different units at a variety of locations with inter~onnecting external piping. Interconnections are made with plugs and connectors which are the same to effect the variety of functions. Supplying main air to each unit is eliminated.
. .
. .
. . ~ , ~ .
. ,- ... ' ' ' ' - '-' ' ' ', ~
- . . .
While the modular units of this invention are particularly adaptable for use in conjunction with the control of heating or cooling of air, they are adaptable to any control function wherein fluid input and output signals are employed. This will be apparent from the fact that the internal control chamber functions can be easily changed to perform a relay, a selector, a controller or a switching function.
It will be apparent to those skilled in the art that a number of variations may be made from the preferred embodiments without departing from the spirit of the invention. For example, the main air conduits 34, 34' and 34" need not extend in a linear manner throu~h the body of the device but could have a curved or circuitous 15 path. Also the inlet and outlet passages 35 and 36 are disposed in the same planeO They also could be displaced at different locations so as to exit from the wall surfaces at other locations. While a more efficient module is provided by the connectors 43 and the pegs 46, 20 these could be eliminated.
: . : : ... :
.
.. ' . ,: . , .,. ~ ~ :
. . .
.
MODULAR PNEUMATIC CONTROL SYSTEMS
This invention relates to modular pneumatic controls, and particularly, modular units which are all of the same configuration so that they can be interconnected using the same fittings thus obviating specialized modular units and fittings as presently employed in the prior art.
The manifolding oE pneumatic control devices is well known. For example, U. S. patents 4,0939329; 4,095,863 and 4,095,864 illustrate the need for a separate manifold device on which the control de~ices are pla~ed. In particular, the '329 and the '864 patents show that di:fferent types of co~trol devices or manifold units are employed in a control ~ystem. U. 5. patent 4,245,5~9 describes a control device with a ~diaphragm stack wherein the internal functions are similar to that employed in the modular unit of this~:invention. ~owever, it is not capable of interconnection in the manner hereinafter : ~ descrlbed. In U. S. patent 4,027,692 lo~ic modules are shown which are presented in a cascade form and are ~ : em,ployed for controllin~ machines by pneumatic means.
: ~ a'ch one of the modular units has different input~
: a~so~iated with it as well as~requiring a diffcrent unit : : referred to as a connecting unit. ~ :
While the prior~ art control units af~ord a means of manifolding several control units into a system, they do not afford a simplified modular control unit:wherein each :
: : ' :~:
~ .
.
. ~ .
unit is of the same configuration and can be interconnected to a common Eluid input source.
It is an advantage of the present invention to provide aa improved pneumatic control device wherein all of the devices are of the same geometric configuration.
It is another advantage of this invention to provide a pneumatic control device wherein all of the connections to the devices are o~ the same type, the same size and are located at the same locations.
It is yet another advantage of the invention to provide a modular control unit of the foregoing type wherein the modular units are plugged together using couplings with the main air piped to only one device and internal air passages delivering the air to all of the other modular units.
It is still another advantage of the invention to provide a modular unit of the foregoing type wherein any series or parallel combination of signalling air can be employed.
Other advantages are a modular control unit wherein the housing can accommodate a multiplicity of control functions yet can be produced with a minimum cost and assembly procedures.
The fore~oing advantages are accomplished and the shortcomingg of the prior art are overcome by the presen~
pneumatic control device wherein a module is provided by a body member having two substantially identi~al wall members which are arran~ed opposite each other. There is a cavity in each body member with a fluid regulator means in the cavityO A fluid passage extends from a first wall to an opposing second wall~ A first fluid input passage extends between the second wall and a third wall, and a fluid output passage extends between the first wall and the third wall, with all of the fluid passages communicating with the cavityc In one aspect, all of the .
~ ~.
_3_ fluid passages are constructed and arranged to selec-tively receive identical fluid connection means or plug means.
In one preferred embodiment, there i3 at least one additional ~1uid module identical to a first module.
Pluid connection means interconnect the fluid passages between the first and second walls of said modules, There are plug means for insertion into said first fluid pas~age and the first fluid input passage at a second wall of one of the additio~al fluid modules and for insertion into the fluid output passage at the first wall of said first module. There are additional plug and fluid connection means for selective insertion into the first fluid input and the output passages at the first, second and third walls of the modules.
In other preferred embodiments, the fluid passages are pneumatic fluid passages; the fluid re~ulator means is provided by a diaphragm disposed in the cavity for ::
contact with a valve member, and the cavity receives one : 20 or more diaphragms without modification of the body member.
Ir. still another preferred embodiment, the modules are formed from cubic body members with a fluid passage extending through the body member in a linear manner, and the fluid input and ou~put passag~s also communicate with the exterior of the body member through an additional : connecting wall surface.
Fig. 1 is a diagrammatic view illustrating a typical prior art pneumatic con~rol system.
Fig. 2 is a diagrammatic view illustrating the fluid control apparatus of the present invention.
Fig. 3 is a perspective view showing two of ~he modules of the present invention for lnterconnection.
~ig. 4 is a sectional view taken along line 4-4 of .35 Fig. 3 but with the two modules in an ass~mbled condition.
. ' : : . , , ' ' ' ., ~ , ' :: ' .
' :~/f ~ q~ l S .'~ ~1 .~ i ' :!,~. i _ 7~'l A t ~ ,~
Fig. 5 is a view in~.vertical section taken along line 5-5 of Fig. 4.
Fig. 6 is a view in vertical section illustrating one of the modules of the present invention taken along line 6-6 of Fig. 3.
Fig. 7 is an assembly view o~ the module shown in Fig. 6.
Fig. 8 is a view similar to Fig. 6 illustrating an additional embodiment of the module.
Fig. 9 is a view in horizontal section of the module shown in Fig. 6 taken along line 9-9 of Fig. 6.
~ ig. 10 is a top plan view of the module shown in Fig. 6 with a portion shown in cross section.
Referring to Fig. 1, a typical prior art pneumatic control apparatus i~ shown generally at 10. It includes three modular pneumatic control devices 11, 12 and 13 which in normal practice has different geometric configurations. The usual main air is supplied independently to the openings 14, ].4' and 14", through the main air line 17. Each of the units will have fluid input passages 15, 15' and 15" as well as output passages 16, 16' and 16". It is recognized that within each of the modules there is some type of ~egulator means which is responsive to the input signal such as through line 18 to activate the regulator means in the unit so that at a predetermined pressure level an output of air will exit from the output 16 and is transferred to the conduit 22. Conduit 22 in turn is interconnected to the input opening 15' of unit 12. A further signal is generated from device 12 through the output opening 16' and through the line 20. The device 13 is not interconnected to the devices 11 or 12. Input and output signals are conveyed by the input line 13 and output line 21 when connected to the respective input opening 15" and the output opening 16". It will be recognized that in the prior art con-struction there is utilized different configurations of the control devices which require a multiplicity of , ~. ' , ' ' ' ' . . , . , . - . , .
,': .' ', - ~ , :,' ., ' , - - ~, . . .
different interconnecting fittings such as the main air line 17, the inlet lines 18 and 19 as well as the interconnectiny line 22 and the outlet lines 20 and 21.
In contrast to the system shown in Fig. 1~ is the modular fluid control apparatus of this invention which is shown generally at 30 in ~ig. 2. The fluid control apparatus 30 includes three identical devices 31, 32 and 33 which are of a cubic construction. As each of the units has essentially the same passages therethrough, only the ones shown in conjunction with the device 31 are described at this stage in detail with the others having the same numbers only they are "primed" or "double -primed"~ Referring specifically to modular device 31, it has a main air conduit 34 which extends linearly from the first side 31r to a second side 311. The conduit 34 terminates in openings 34a and 34b for receiving, for example, a plu~ 41 and a coupling 40, respectively. An L-shaped inlet passage 35 also communicates with the second side 311 through the orifice 35a and to a third side 31t by the orifice 35b. An ~-shaped outlet passage 36 cr Inicates with the first side 31r through the orifice 36a and to the third side 31t by the orifice 36b. As is seen in Fig. 2, the main air conduits 34, 34' and 34" are interconnected by the couplings 40 and with a main air supply indicated at 29~ The ve~atility of the devices is shown in Fig. 2 where, for example, a variety of input and output co~duits 37 and 38, respectively, are connec~ed to their respective inlet and outlet passages of the devices. Those passages which are not utilized~0 are provided with plugs 41. In this manner and, for le, in conjunction with device 33, an input signal is provide~ ~y the inlet line 37 and an outlet signal is provided by the outlet conduit 38. This provides a parallel connection.- However, in conjunction with devices 31 and 32, these are interconnected in a series manner with the inlet conduit 37 connected to the inlet passage 35, wherea~ the outlet conduit 38 is connected to ' . : :
~ 7 ~ J 7 .L~ ~ r: J~7<~ 7Y ~
the outlet passage 36' and the outlet passage 36 and inlet passage 35' being closed by the plugs 41. As later described in more detail, device 33 inlet passage 35" and outlet passage 36" communicate with an internal regulator means as does main air conduit 34".
Referring specifically to Figs~ 3, 4 and 5, there it is illustrated the ease of interconnecting modular devices 31 and 33 for example. Each of the units has two projecting connectors 43 and 43a which extend frcm opposing lower and upper back sides. Each of the connectors 43 and 43a has a "T"-shaped recess 48 to receive, for example, a screw for mounting the devices to a mounting plate or board. ~hen mounted, the connectors and screws will be covered by insertion into an opening such as 44" in the device 33. It will be understood that not both of the connectors need be utilized for attachment as these units are made in a symmetrical manner. To make certain that the units are assembled in the proper manner, it will be noted that there are 20 locating pegs such as 46, 46" and 46a" ~See Fig. 6).
These will fit into corresponding openings such as 39 and 39' in an opposing unit. In order to assure proper orientation and as will best be seen in conjunction with Fig. 6, peg 46" is square whereas peg 46a" is round for fi~ting into round and square open.ings at the top and bottom, respectively.
~ eferring specifically to Figs. 6 and 7, a typical fluid regulator means is shown inside the device 33 and 133. As seen in Fig. 6, device 33 has a cavity 50 which houses a bottom plate 52 as well as a retainer plate 53, and diaphragm plates 54 and 55 for housing diaphragms 92, 93 and 94 as well as stack plates 64 and 65. These form a diaphragm stack generally 95 which will move in the cavity 50 in response to various pressures or vacuum conditions, as is well known in the art (see, for example, U. S. patent 4,245,549). A combination supply and exhaust mushroom shaped valve 56 is biased by the :~
:, .
, ,, ...... , ~ ~ .
.. - : . . . . ... . .
~ ,, - ~ - : ~ ~ .. :: . , . :
, - , .
: '" ' .', '-,, ' ' ' ~ '' '' . ... ~ . : -. .. .
r ~ ??~
spring 59 positioned on the pcst 58 for seating against supply valve seat 57. As best seen in ~ig. 7, the val~e has a small diameter portion 56a for sealing against a second valve seat 81a in a spring retainer 81 which serves as an exhaust valve. A spring 61 is positioned between the retainer 81 and the plate 62 to urge the diaphragm stack 95 upwardly. The stack 95 including the stack plates 64 and 65 are secured to the diaphragms 92, 93 and 94 by the screw 78 and washer 79 which fit into the threaded portion 81b of the retainer 81. There is also a spri~g 66 for urging the diaphragm stack 95 downwardly. It i5 engaged by the threaded adjustment nut 69 at one end and with the retainer 80 at the opposing end. A threaded stem 70 engages the adjustment nut 69 for this purpose and is rotatably captured in the neck 77. As best seen in Fig. 6, a portion of the spring 66 is accommodated in the neck 77 of the device 33 as is the adjustment nut 69 and the threaded stem 70. The turning of the threaded stem 70 by means o:E the slotted head 70a adjusts the tension on the spring 66, and accordingly the tension on the diaphra~m stack 95. Referring back to Fig. 7, it is seen that the dial kllob 68 is secured to the stem 70 by the screw 51. Rotation of the dial knob 68 is limited by the stop 67 riding in the groove 68a which will have a stop surface (not shown). An indicator dial ring 85 is positioned adjacent the knob 68.
Fig, 75 9 and 10 illustrates ~he interconnection of the plate members 52-55 inside the device 33. This is effected by eight screws 82 which extend through the plates as w~11 as through the screw holes 33s in the body 47. For this purpose, there are accommodating nut well 91 in the upper surface of the body 33b to accommodate the nuts 83 attached to the screws 82. A gasket 84 is positioned between plates 53 and 52.
Fi~s. 6 and 9 further illustrate communication in the device 33 by the input and output signals as well as the main air supply. Inlet passage 35" allows ~ .
~ , , , . _ pressurized signal air to enter through passages 86 and 73 to effect a.downward movement of the diaphragm stack 95. This effects an opening of the valve 56 which in turn allows air from the main air supply in main air eonduit 34" to flow through passage 89 to supply valve seat 57 and flow outwardly through passages 74 and 88 to outlet passage 36" in a manner well known for this device. Referring specifically to Fig~ 9, it is seen that there are additional inlet passages 39 and 42 in the body 47 conneoting with passages 87 and 90, respec-tively. These extend downwardly into the body 47 for introducing secondary and tertiary inputs to the diaphragm stack 95. Central cavity portion 33C
accommodates the spring 66 and the associated retainer 80 as previously explained.
An alternative embodiment is shown generally at 133 in Fig. 8. Similar components are designated with the same numbers as referred to in ~onjunction with unit 33 except they are indicated in the "100 series". A
difference between unit 33 and 133 is the fact that there are additional diaphragms 196 and 197 as well as plates 160, 163 and stack plates 167 and 175. This provides additional co~trol chambers as represented by the numerals 198-202. As stated earlier, the use of the movable diaphragm stack 195 to e~fect a control function in the modular device 133 is well known in the art.
~asically, a siqnal in the form of pressurized signal air such as would be introduced from inlet passage 135" and passages lB6 and 173. From passa~e 173 it enters a control chamber such as 199. This signal air in conjunction with other sig~al air introduced into other chambers such as 198 can oause a pressure differential acting across the diaphram 193. This can cause diaphragm stack 195 to move downwardly and valve 156 to be moved of~ seat 157 to thereby allow supply air from the main air conduit 34" to be released as an output through passage~ 174, 188 and outlet pas~age 136". An exhaust ~ :
. : . ' : :
:
~ . :
.. ' : ' ' .. :
. : ' ~: . ~ ' . .
.
~ : . . . :
function is effected by output air passing throuyh passage 174 and on diaphragm 194 to effect an upward movement on the diaphragm stack 195 with movement of valve 156 away from valve exhaust seat 181a.
With reference to Fig. 10, it is seen that there are --crescent shaped passages 35w which extend from the top surface of device 33 to the inlet passages such as 35".
These provide windows to observe whether there is an interconnecting coupling 40 placed between devices 33 and 32. If desired, the coupling 40 could have an inter-connecting extension which would fit between two adjacent windows to allow placement o~ a pressure gauge.
Additional screw holes 35h are also provided to allow placement of a name plate as seen at 45 in Fig. 3 or a cover plate in those instances where a dial knob is not employed.
The preferred material for composing the bodies of the devices 31-33 is rigid molded plastic. ~owever t other suitahle ma~erials would be die cast aluminum.
Inlet and outlet conduits 37 and 38, as well as couplings 40 and plugs 41 are composed of flexible molded plastic. Other materials such as rubber could be substituted.
It will thus be seen from the previous description, that there is now provided a modular pneumatic control device which is composed of a basic unit that can be interconnected in various manners so as to prsvide a wide variety of functions. Substantial cost savings is effected in that each cell or modular unit is the same, thus eliminating the expense of interconnecting different units at a variety of locations with inter~onnecting external piping. Interconnections are made with plugs and connectors which are the same to effect the variety of functions. Supplying main air to each unit is eliminated.
. .
. .
. . ~ , ~ .
. ,- ... ' ' ' ' - '-' ' ' ', ~
- . . .
While the modular units of this invention are particularly adaptable for use in conjunction with the control of heating or cooling of air, they are adaptable to any control function wherein fluid input and output signals are employed. This will be apparent from the fact that the internal control chamber functions can be easily changed to perform a relay, a selector, a controller or a switching function.
It will be apparent to those skilled in the art that a number of variations may be made from the preferred embodiments without departing from the spirit of the invention. For example, the main air conduits 34, 34' and 34" need not extend in a linear manner throu~h the body of the device but could have a curved or circuitous 15 path. Also the inlet and outlet passages 35 and 36 are disposed in the same planeO They also could be displaced at different locations so as to exit from the wall surfaces at other locations. While a more efficient module is provided by the connectors 43 and the pegs 46, 20 these could be eliminated.
: . : : ... :
.
.. ' . ,: . , .,. ~ ~ :
. . .
.
Claims (8)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A fluid control apparatus comprising:a first fluid module defined by a body member having substantially identical first and second walls, said walls being arranged opposite each other;
a single cavity in said body member;
fluid regulator means in said cavity;
a fluid passage extending between said first wall and said second wall;
a fluid input passage extending between said second wall and a third wall;
a fluid output passage extending between said first wall and said third wall;
with all of said fluid passages communicating with said cavity;
a second substantially identical module adapted to be connected with said first module;
frictional fitment means integral with each module for placement in and interconnecting as adjacent fluid passage of each said body member, said coupling means also providing communication with said fluid passage which is nonadjacent to another fluid passage; and plug or fluid coupling means for placement in an adjacent fluid input passage and output passage;
whereby said modules can operate as a stand alone fluid control apparatus without requiring any additional apparatus.
a single cavity in said body member;
fluid regulator means in said cavity;
a fluid passage extending between said first wall and said second wall;
a fluid input passage extending between said second wall and a third wall;
a fluid output passage extending between said first wall and said third wall;
with all of said fluid passages communicating with said cavity;
a second substantially identical module adapted to be connected with said first module;
frictional fitment means integral with each module for placement in and interconnecting as adjacent fluid passage of each said body member, said coupling means also providing communication with said fluid passage which is nonadjacent to another fluid passage; and plug or fluid coupling means for placement in an adjacent fluid input passage and output passage;
whereby said modules can operate as a stand alone fluid control apparatus without requiring any additional apparatus.
2. The fluid control apparatus of claim 1 wherein all of said fluid input passages are constructed and arranged to selectively receive identical fluid coupling means or plug means.
3. The fluid control apparatus of claim 1 further including a second fluid input passage which extends through said third wall and is in communication with said cavity.
4. The fluid control apparatus of claim 3 further including a third fluid input passage which extends through a fourth wall and is in communication with said cavity.
5. The control apparatus of claim 1 wherein said fluid passages are pneumatic fluid passages.
6. The control apparatus of claim 1 wherein said fluid regulator means is defined by a diaphragm disposed in said cavity for contact with a valve member.
7. The control apparatus of claim 6 wherein said cavity is constructed and arranged to receive one or more diaphragms without modification of said body member.
8. The control apparatus of claim 1 wherein said first and second modules are connected together by said frictional fitment means.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57798190A | 1990-09-05 | 1990-09-05 | |
US577,981 | 1990-09-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2085747A1 CA2085747A1 (en) | 1992-03-06 |
CA2085747C true CA2085747C (en) | 1999-03-16 |
Family
ID=24310959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2085747 Expired - Fee Related CA2085747C (en) | 1990-09-05 | 1991-09-03 | Modular pneumatic control systems |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0600879A1 (en) |
AU (1) | AU8635791A (en) |
CA (1) | CA2085747C (en) |
WO (1) | WO1992004568A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4340770A1 (en) * | 1993-11-30 | 1995-06-01 | Bosch Gmbh Robert | Pneumatic valve device with at least two housing modules attached to one another |
DE29703788U1 (en) * | 1997-03-03 | 1997-06-26 | Bürkert Werke GmbH & Co., 74653 Ingelfingen | Modular control block for analysis technology |
SE521634C2 (en) * | 1998-10-06 | 2003-11-18 | Uwe Verken Ab | Modular valve combination system for water-type fluids |
DE19856155A1 (en) * | 1998-12-05 | 2000-06-08 | Hansgrohe Ag | System of sanitary fittings |
GB2577296A (en) * | 2018-09-20 | 2020-03-25 | Bifold Fluidpower Ltd | Flow control manifold |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3244193A (en) * | 1964-02-24 | 1966-04-05 | Gen Gas Light Co | Multiple valve units |
US3806088A (en) * | 1972-05-01 | 1974-04-23 | Hydro Syst Inc | Manifold apparatus |
FR2266028B1 (en) * | 1974-04-01 | 1976-12-17 | Telemecanique Electrique | |
US4093329A (en) * | 1977-03-22 | 1978-06-06 | Robertshaw Controls Company | Manifolding means and system for electrical and/or pneumatic control devices and methods |
US4095863A (en) * | 1977-03-30 | 1978-06-20 | Robertshaw Controls Company | Manifold means and system for electrical and/or pneumatic control devices and method |
US4095864A (en) * | 1977-03-30 | 1978-06-20 | Robertshaw Controls Company | Modular manifolding means and system for electrical and/or pneumatic control devices and parts and methods |
US4245549A (en) * | 1978-09-18 | 1981-01-20 | Robertshaw Controls Company | Control device diaphragm stack and method of making the same |
-
1991
- 1991-09-03 EP EP91916658A patent/EP0600879A1/en not_active Withdrawn
- 1991-09-03 AU AU86357/91A patent/AU8635791A/en not_active Abandoned
- 1991-09-03 WO PCT/US1991/006283 patent/WO1992004568A1/en not_active Application Discontinuation
- 1991-09-03 CA CA 2085747 patent/CA2085747C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
AU8635791A (en) | 1992-03-30 |
EP0600879A1 (en) | 1994-06-15 |
CA2085747A1 (en) | 1992-03-06 |
EP0600879A4 (en) | 1994-01-26 |
WO1992004568A1 (en) | 1992-03-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5178191A (en) | Modular pneumatic control systems | |
US4230143A (en) | Control valve arrangement for dental equipment | |
EP0859155B1 (en) | Fluid control apparatus | |
US3610274A (en) | Fluid logic circuit | |
US4319492A (en) | Pressure transmitter manifold | |
US4828218A (en) | Multiple mode regulator | |
US4100937A (en) | Valve block | |
CA2085747C (en) | Modular pneumatic control systems | |
US3572368A (en) | Pneumatic control system manifold means | |
US5341841A (en) | Fluid distribution device | |
CA2260887C (en) | Valve, unit, assembly and system | |
US6000427A (en) | Manifold for use with dual pressure sensor units | |
US4274452A (en) | Diaphragm valves and valve systems | |
US3465772A (en) | Fluid amplifier system | |
US4640311A (en) | Modular system of distribution | |
CA2277138C (en) | Two-piece manifold | |
ATE57269T1 (en) | CONTROL VALVE. | |
IL73598A0 (en) | Fluid control device particularly useful in liquid transfusion apparatus | |
USRE24255E (en) | Fluid mixing valve | |
GB2225457A (en) | Pressurising and purging apparatus | |
US4084603A (en) | Fluid-blending system | |
US3588202A (en) | Automatic fluid control device | |
CA1166454A (en) | Gas switching device | |
GB2262135A (en) | Multi ejector vacuum pump | |
US3593734A (en) | Pressure-responsive element |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |