CN203757055U - Multiport rotating disc valve - Google Patents

Multiport rotating disc valve Download PDF

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Publication number
CN203757055U
CN203757055U CN201420010382.1U CN201420010382U CN203757055U CN 203757055 U CN203757055 U CN 203757055U CN 201420010382 U CN201420010382 U CN 201420010382U CN 203757055 U CN203757055 U CN 203757055U
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China
Prior art keywords
rotor
stator
head piece
suction port
single head
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Expired - Lifetime
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CN201420010382.1U
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Chinese (zh)
Inventor
黄华远
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YUANWEI MEDICAL EQUIPMENT Co
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YUANWEI MEDICAL EQUIPMENT Co
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Priority to CN201420010382.1U priority Critical patent/CN203757055U/en
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Publication of CN203757055U publication Critical patent/CN203757055U/en
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Abstract

A multiport rotating disc valve comprises a stator and a rotor. The stator comprises fluid flowing ports which comprise a plurality of single flowing ports and at least one common flowing port. The single flowing ports are communicated with at least one target position, and the common flowing port is communicated with a fluid source. The single flowing ports are arranged at intervals in a separation mode in the stator, and the stator portion has angular length. The rotor is at least provided with a first section, a second section and a third section which are arranged in a flowing channel type. The rotor can face the air or be connected with the fluid flowing ports of the stator. Connection is conducted at a plurality of preset connection positions between the stator and the rotor. Each connection position is relevant with the angular position of the rotor relative to the stator. At least a part of the rotor rotates clockwise or anticlockwise in different preset sequences of the connection positions. The multiport rotating disc valve has the advantage of enabling fluid to flow from at least one fluid source to a plurality of target positions.

Description

Multiport rotary disc valve
Technical field
The utility model relates to multiport rotary disc valve, the valve of especially carrying with predetermined period operation, as, in inflator, repeatedly periodically inflate and venting toward multiple pressure air bags.
Background technique
Existing a kind of rotary disc valve, for the pressure air bag for the treatment of oversleeve/leg cover is inflated and exitted, is incorporated in the application for referencial use.This rotary disc valve comprises a stator and a rotary distributor.This stator has multiple fluid flow ports; This rotary distributor has many runners with runner type arrangement.This runner can connect and/or flow ports is connected to predetermined junction point between flow ports, and each junction point is relevant with the position, angle of the rotary distributor with respect to stator.In the process of or part one-way rotation completely unidirectional at rotary distributor, a succession of joint can form predetermined order.This rotary distributor comprises that a rotor and one are being contained in epitrochanterian mask, and both are applicable to the design of many runners.This mask can change runner type by changing its position with respect to rotor, therefore rotary turnplate valve can be under different predetermined sequences the position of corresponding different masks.
Existing another kind has the rotary disc valve of similar functions, and its stator comprises two disks fastened to each other.Two stator discs sliding contact rotary distributor between it.Rotor disk has U-shaped runner and slot hole, in rotary distributor rotates the process of a week, at the head piece of different junction point connecting stators.
Existing the third has many mouthfuls of rotary disc valves of similar functions, and its identity function is that many pipelines are connected to each other according to predetermined period simultaneously.The stator of this rotary disc valve and the assembly of rotary distributor are made up of two parallel discs or disk respectively.Rotary distributor is clipped between two parallel discs of stator.Cross pipe extends between rotor disk, until form U-shaped runner or the groove runner as above quoted.
Model utility content
The purpose of this utility model is to overcome above-mentioned defect, provides a kind of multiport rotary disc valve that allows fluid at least flow into multiple target locations from a fluid source to society.
The aspect relating to according to the utility model, many mouthfuls of rotary disc valves can allow fluid at least flow into multiple target locations from a fluid source, and described rotary disc valve comprises:
A stator, contains fluid flow ports, comprises multiple single head pieces and at least one common head piece; Described single head piece can at least circulate with a target location; A described common head piece can circulate with fluid source; Described single head piece spaced apart at a certain distance in its stator, its stationary part has angular length;
A rotor, has at least in first, second, and third sector with runner type arrangement; This rotor can be towards air, or the fluid flow ports of connecting stator; This is connected to multiple predetermined junction points between stator and rotor and carries out; Each junction point is relevant with the position, angle of the rotor with respect to stator; In the different predetermined sequences of described junction point, rotor has part rotation clockwise or counterclockwise at least, and there is respectively the angular length of first, second and rotor sections first, second, and third rotor sections; These three sectors are spaced-apart, and its angular length at least equals described stator sections angular length; Described third trochanter sector has part area at least between the first and second rotor sections.Another aspect relating to according to the utility model, many mouthfuls of rotary disc valves have at least two operating modes, can allow fluid at least flow into multiple target locations from a fluid source, and described rotary disc valve comprises:
A stator, contains fluid flow ports, comprises multiple single head pieces and at least one common head piece; Described single head piece can at least circulate with a target location; A described common head piece can circulate with fluid source; Described single head piece spaced apart at a certain distance in its stator, its stationary part has angular length;
A rotor, has at least in first, second, and third sector with runner type arrangement; This rotor can be towards air, or the fluid flow ports of connecting stator; This is connected to multiple predetermined junction points between stator and rotor and carries out; Each junction point is relevant with the position, angle of the rotor with respect to stator; In the different predetermined sequences of described junction point, rotor has part rotation clockwise or counterclockwise at least; There is a main air outlet described the first rotor sector, connecting passage along its whole extended length, and the angular length of the first sector at least equals the angular length of described stator sections; There is a suction port described the second rotor sections, and connecting passage flows in a kind of pattern therein; There is a suction port described third trochanter sector, and connecting passage flows in another a kind of pattern, and each runner suction port has a sidepiece, and the suction port runner of the single head piece of described stator and described rotor is coupled together; Described sidepiece, on two sides, described the first rotor sector, and is separated from it.
This stator may have a common suction port and a common air outlet at least; Described suction port is on described stator sections.
The aspect relating to according to above-mentioned the utility model, first rotor sections can comprise a primary outlet runner, second rotor sections comprises a main-inlet runner; This primary outlet and main-inlet runner extend along the whole length of its respective sectors.The 3rd rotor sections can comprise an additional suction port and air outlet; Extend along the whole length of described third trochanter sector described additional air outlet.The pattern that this rotary disc valve is also suitable for is that runner circulates with the common suction port of described stator in an orderly manner separately.Subsequently, runner is connected with the common air outlet of described rotor simultaneously.In addition, this rotary disc valve also pattern applicatory is that runner circulates with the suction port of described stator in an orderly manner separately.Subsequently, runner is connected in succession with the main air outlet of other independent fluid or described stator.
Another aspect relating to according to above-mentioned the utility model, this stator can contain first common suction port in described stator sections, can contain second common suction port outside described stator sections; Described first common suction port is whole angular length extension along described stator sections.This stator also can have a common air outlet of master and at least one additional air outlet.Third trochanter sector can comprise front inflation air outlet and front inflation suction port, is described air inlet runner part between two gas ports; Described front inflation air outlet and suction port can connect between described single head piece.This rotary disc valve pattern applicatory is that air inlet runner part, in described the second rotor sections, is given second common suction port circulation of single channel and described stator in an orderly manner; Then, described primary outlet runner connects the common air outlet of single channel to described stator simultaneously.In addition, rotary disc valve also pattern applicatory is that the air inlet runner part in third trochanter is fan-shaped, circulates in an orderly manner first or second common suction port of single channel and described stator; Described front air outlet and suction port provide fluid road logical between single channel.Then, described primary outlet runner connects single channel in an orderly manner to the common air outlet of described master or additional air outlet.
The utlity model has and can allow fluid at least flow into the advantage of multiple target locations from a fluid source.
Brief description of the drawings
For understanding the utility model and actual application thereof, the following stated is only reference example, and accompanying drawing is as follows:
Fig. 1 is the decomposing schematic representation according to rotary disc valve of the present utility model;
Fig. 2 and Fig. 3 are respectively the structural representations of upper part and the lower part of rotary disc valve shown in Fig. 1;
Fig. 4 and Fig. 5 are respectively the top and bottom perspective views of a stator, according to an embodiment's of the utility model situation;
Fig. 6 is the worm's eye view of a rotor, according to an embodiment's of the utility model situation;
Fig. 7 is the structural representation of the stator shown in Fig. 4 to Fig. 6 and rotor;
Fig. 8 to Figure 10 schematic diagram is the demonstration schematic diagram of stator shown in Fig. 4 to Fig. 7 and rotor composition order;
Figure 11 and Figure 12 schematic diagram are the demonstration schematic diagram of stator shown in Fig. 4 to Fig. 7 and rotor fluctuation order;
Figure 13 and Figure 14 are respectively the top and bottom perspective views of a stator, according to another embodiment's of the utility model situation;
Figure 15 is the worm's eye view of a rotor, according to another embodiment's of the utility model situation;
Figure 16 is the structural representation of the stator shown in Figure 13 to Figure 15 and rotor;
Figure 17 to Figure 19 is the demonstration schematic diagram of stator shown in Figure 13 to Figure 16 and rotor composition order;
Figure 20 and Figure 21 are the demonstration schematic diagram of stator shown in Figure 13 to Figure 16 and rotor fluctuation order.
Embodiment
Shown in Fig. 1 to Fig. 3 is according to an embodiment's of the utility model many mouthfuls of rotary disc valves 10, fluid at least from a fluid source with junction point order, flow to the target location of multiple default junction points.This application may be implemented in and contains inflator, and it has multiple pressure air bags.For explanation the utility model (being not limited to scope of the present utility model), this device can be for example to have massage therapy oversleeve/leg cover of N annular air-pocket, for encasing a people's limbs.
Rotary disc valve 10 comprises three chief components: a stator disc 21; A rotor disk 31, coaxial along the axis A of rotary disc valve 10; A starter 90.The corresponding stator disc 21 of rotor disk 31 rotates, and is rotated in clockwise and counterclockwise direction by starter 90.
As shown in Figure 4 and Figure 5, stator disc 21 has first surface 21a and second surface 21b(Fig. 5), and a radius RS.Stator disc 21 has an axial port 23, and it is for metal shaft 92(Fig. 1) be applied in below and have further and paraphrase.In addition, stator disc also has multiple fluid flow ports (being N single head piece 25), a common suction port 27 and a common air outlet 24.
N single head piece 25, on the stator disc 21 of stator sections SS, is staggered in fan-shaped mode; Between each single head piece, there is angle radially to separate.The child's hair twisted in a knot-childhood length L s of sector SS between first single head piece 251 and last single head piece 25 N is less than 180 °.Single head piece 25 is characterised in that, each radial distance X starts to measure from common suction port 27 respectively.Range finding is unequal from possibility, and for example, the distance x5 of single head piece 25 is less than the distance of single head piece 256.
Each single head piece 25 has the aperture 20a that runs through single head piece, between the first surface 21a of stator disc 21 and second surface 21b, extends; Recess 20b forms on first surface, and for aperture, 20a provides access.
Common suction port 27 has end 22a and the second flow field end 22b of first flow, and both around extend along the latter between single head piece 25 and axial port 23.Common suction port 27 also comprises the aperture 29 of running through suction port, and the end 22a of contiguous first flow extends between the first surface 21a of stator disc 21 and second surface 21b.Aperture 29 contacts common suction port 27 with fluid source.Aperture, air outlet 26a and 26b are contained in common air outlet 24.Aperture, air outlet 26a contacts common suction port 24 with 26b with air.
As shown in Figure 5, on second face 21b of stator disc 21, gas access 201 is the back side in the aperture 29 of suction port.This entrance can contact gas source (without diagram); Two venting outlet 203a(air outlet aperture 26a) and 203b(air outlet aperture 26b) situation of ingress of air is, passively exit or be initiatively deflated to vacuum source (nothing illustrates).In figure, also has the respective ends 205 of the aperture 20a of single head piece 25.
As shown in Figure 6, rotor disk 31 has a face 31b, an axial port 30; Rotor sections S1 and S2(span are d (d≤0)), and a rotor sections S3, mainly between rotor sections S1 and S2.Sector S3 can be located at completely between sector S1 and S2 or at it both or one of overlap onto required scope.
Rotor disk 31 is rotatably installed on stator 21, and its sector S1, S2 and S3 have runner at the recess of first face 31b of rotor, can be used for connecting the fluid flow ports of rotor.In the time that rotor at least rotates clockwise or counterclockwise with part, this runner can, at multiple predetermined junction points, connect between head piece.Each junction point is relevant with the position, angle of the rotor with respect to stator.
Especially, sector S1 comprises a main-inlet runner 33, defines the angular length L1 of sector S1 between its first end 33a and the second end 33b.The radius R 1 of runner 33 is whole equal in length with it, and except the inducer 32 of runner the first end 33a, between runner 33 remaining parts and the axle opening 30 of rotor 31, the distance of half stops.The radius of inducer 32 is RIP, and its length at least equals the maximum value x of stator 21 fluid flow port 25 single radiuses.
Rotor sections S2 comprises a primary outlet runner 35, defines the angular length L2 of sector S2 between its first end 35a and the second end 35b.The radius R 2 of runner 35 is whole equal in length with it, and except the outlet section 34 of runner the second end 33b, between runner 35 remaining parts and rotor 31 girths, the distance of half stops.
The angular length L1 of rotor sections S1 and S2 and L2, at least equate with the angular length Ls of rotor sections SS.
Rotor sections S3 comprises an additional inlet channel 37 that is positioned at center, substantially extends along the radial direction of rotor sections S3.This sector also has an additional outlet flow 39 and a peripheral section 36; Two of runner 39 sidepiece 39a that radially extend and 39b are located at the both sides of central flow channel 37; Peripheral section 36 is extended between 39a and 39b, and 39b defines the angular length L3 of rotor sections S3.
Get back in Fig. 1 to Fig. 3, stator 21 and rotor 31 are all in metal shaft 92.Rotor avris 21b has a plastic gear 94, can transmit and turn to rotor 31 from starter 90.
This rotary disc valve also has a dish 95 below stator, head piece, suction port and air outlet that it is connected to stator 21 and is connected to stator 21 by pipe fitting 97 wherein.In operation, each head piece 25 of stator 21 is connected to by pipeline in the air bag of above-mentioned massage oversleeve/leg cover (without diagram); Rotor flows into 33,35,37 and 39 fluid, and the multiple predetermined junction point being allowed to condition between the common suction port 27 and 24 of single head piece 25 and/or stator 21 connects; Junction point is under different predetermined sequences, and rotor is along in direction B1 or the full rotation of B2 or half rotation process, and each junction point is relevant with the position, angle of the rotor 31 with respect to stator 21.
Two predetermined sequences will be described by reference to example: composition order (Fig. 8 to 10) and fluctuation order (Figure 11 and 12).
Composition order: inflation in an orderly manner---venting simultaneously
The position that rotor 31 turns to is, the first end 33a of main inlet channel 33 covers the first single head piece 251 and inducer 32 and cover the place in import aperture 29.So just can between the first single head piece 251 and import aperture 29, produce fluid is communicated with.The air of air-source flow into from import aperture 29 the first single head piece 251, the first annular air-pockets therefore produce and start inflation.Reach after predetermined pressure at the first air bag, or after the scheduled time (as, 2 seconds), rotor 31 rotates up in B1 side.Main the inlet channel 33 thereby single next one of stator head piece 252 is connected on common suction port 27.As mentioned above, next annular air-pocket starts inflation.The rotor 31 of Fig. 8 and Fig. 9 is covering on the position of the 4th single head piece 254 and the single head piece 25N of N respectively, thereby to corresponding annular air-pocket inflation.In the time that gas replenishment process finishes, all annular air-pockets all complete inflation, and main inlet channel 33 covers N fluid flow port 25.After the scheduled time, rotor continues on B2, to rotate in B1 direction or in the opposite direction, so N fluid flow port 25 all covered by primary outlet runner 35, and goes out port recess 34 by it and is communicated with (Figure 10) with common air outlet 24 fluids.Thus, ring-shaped gasbag is exitted simultaneously, and composition order completes.
Fluctuation order: inflation in an orderly manner---venting in an orderly manner
The position that rotor 31 turns to is that runner 37 covers the common suction port 27 of first single head piece 251 and stator 21, can produce fluid between the two and be communicated with, and as mentioned above, start inflation in an orderly manner from first annular air-pocket.Then, second annular air-pocket inflated in the same manner.Reach after predetermined pressure at air bag, or after the scheduled time (as, 2 seconds), rotor 31 rotates up in B1 side; Runner 37 then cover second single head piece 252 and the 3rd single head piece 253 be connected to common suction port 27, so analogizes.As shown in figure 11, rotor covers the 3rd single head piece 253 and the 4th single head piece 254, and is connected to common suction port 27.Meanwhile, runner 39 is connected to the 5th single head piece 255 second single head piece 252, allows air flow into the 5th single head piece 255 from second single head piece 252, thereby progressively to the second annular air-pocket venting and to the 5th airbag aeration.When runner 37 covers latter two single head piece 25 N-1 and 25 N, runner 39 is connected to the common air outlet 24(Figure 12 of stator 21 single head piece 25N-2).Meanwhile, corresponding annular air-pocket starts venting.When fluctuation order finishes, all annular air-pockets all complete venting.
Contrary with rotor 31 with stator 21, rotary disc valve 10 can comprise a stator 61 and a rotor 71, as shown in Figure 13 to Figure 14.
As shown in Figure 13 and Figure 14, stator disc 61 has first face 61a(Figure 13), second face 61 b(Figure 14), and a radius R ' s.Stator disc 61 forms an axial port 63 for metal shaft 92, and comprises that N is individual similar to the single head piece 25 of stator 21 with staggered another the single head piece 65(of fan-shaped mode).Stator disc 61 also comprises the induction runner 69a of a common suction port 67a(containing aperture 67b and band induction mouthful 69b), and three common air outlet 64a, 64b and 64c, outlet aperture 64a, 64b and 64c had respectively.The head piece of stator 61 is identical with head piece and the aperture of previously described stator 21 with the function in aperture.
S ' s child's hair twisted in a knot-childhood length L ' s between the first single head piece 251 and last single head piece 25 N in sector is less than 180 °.Another single head piece 65 is characterised in that, each radial distance x ' starts to measure from induction runner 69a respectively.
Each single head piece 65 has one to run through single head piece aperture 60a, between stator disc 61 first face 61a and second face 61b, extends.Also fluted 60b of each single head piece, is formed at that first face 61a goes up and is that aperture 60 provides access.
As shown in figure 14, second of stator 61 face 61b comprises that a suction port 601 and three venting export 603 a, 603 b and 603 c.This suction port 601, in the opposite location of aperture 67 b ends, is connected to air-source (without diagram); This venting exports 603 a, 603 b and the 603 c opposite location at outlet aperture 66a, 66b and 66 c ends, is connected to vacuum source (without diagram) when passive venting when being connected to air or initiatively exitting.Shown in figure, also have the opposite ends 605 of single head piece 65, and a static pressure sensitive 607, in the opposite ends of induction mouthful 69b.
There are as shown in figure 15 first face (without diagram) and second face 71 b of rotor disk 71, axial port 79, and rotor flow tract 73 and 77.Runner 73 is outlet flow, has the first end 73a and the second end 73b.This runner delimited out the first rotor sector S ' 1 containing angular length L ' 1.Outlet flow 73 has an outlet section 70 at the first end 73a.Runner 77 is inlet channel, has both sides finger portion 77a and 77b.(being designated hereinafter simply as finger-like).Outlet flow 73 is between finger-like 77a and 77b.The radius length LF of finger-like 77a and 77b at least equals the radius maximum value x ' of the single head piece 65 of stator 61.Rotor disk 71 is inflated before also comprising one and is inflated suction port 703, static pressure induction outlet 705 and a static pressure induction outlet 707 before air outlet 701, one.
A part for inlet channel 77 is the first finger-like 77a, as delimiting the second rotor sections S ' 2; Another part is the second finger-like 77b, front inflation air outlet 701,703 and 705, as delimiting third trochanter sector S ' 3.
The example of following composition order (Figure 17 to Figure 19) and fluctuation order (Figure 20 and 21) is to use previously described stator 6 and rotor 71.Composition order
The position that rotor 71 turns to is that finger-like 77a covers the first single head piece 651, can be connected to common suction port 67 by runner 77.The air of air-source from import aperture 67b flow into the first single head piece 651, the first annular air-pockets therefore produce and start inflation.Reach after predetermined pressure at the first air bag, or after the scheduled time (as, 2 seconds), rotor 71 rotates up in D1 side.Finger-like 77a thereby cover next single head piece.Pressure is measured by pressure sensitive air outlet 707, the contiguous finger-like 77a in this air outlet.Air outlet 707 is connected to induction runner 69a, and is finally connected to the static pressure induction 607 on second face 61b of stator 61.Shown in Figure 17, be that rotor 71 covers the 4th single head piece 654, previous single head piece 651 and 652 has been covered, and its corresponding annular air-pocket has completed inflation.Cover single head piece 651 to 65N-1, rotor 71 arrives last single head piece 65 N(Figure 18).Cover after single head piece 65 N, last annular air-pocket starts inflation, and gas replenishment process completes.After the scheduled time, rotor 71 rotates on D2 in D1 direction or in the opposite direction, so N fluid flow port 65 all covers (Figure 19) by outlet flow 73.Between single head piece 65 and common air outlet 64a, producing fluid is thus communicated with.All ring-shaped gasbags are exitted in an orderly manner, complete composition order.Fluctuation order:
The position that rotor 71 turns to is that finger-like 77 b cover the first single head piece 651.The first annular air-pocket reaches and starts inflation after predetermined pressure, and its force value export 705(by pressure sensitive and is close to finger-like 77 and b) measures gained.As mentioned before, rotor 71 moves to next single head piece along direction D1.Rotor 71 shown in Figure 20 covers single head piece 653.Meanwhile, air from single head piece 651 by inflation outlet 701 flow to front inflation entrance 705 to single head piece 654.Thereby progressively to the second annular air-pocket venting and to four gasbags inflation (Figure 20).Rotor 71 forwards single head piece 654 to, and common air outlet 73 covers the first single head piece 651, thereby corresponding the first annular air-pocket starts venting.Rotor 71 continues mobile, and finger-like 77 b cover next single head piece 655, jointly go out flow channel and cover next head piece 65 2.Shown in Figure 21, the position of rotor 71 is that finger-like 77 b cover single head piece 65 N-1.Meanwhile, single head piece 65 1 to 65 N-4 are jointly gone out flow channel and are covered, its corresponding annular air-pocket venting.

Claims (6)

1. a multiport rotary disc valve, is characterized in that, comprising:
A stator, contains fluid flow ports, comprises multiple single head pieces and at least one common head piece; Described single head piece can at least circulate with a target location; A described common head piece can circulate with fluid source; Described single head piece spaced apart at a certain distance in its stator, its stationary part has angular length;
A rotor, has at least in first, second, and third sector with runner type arrangement; This rotor can be towards air, or the fluid flow ports of connecting stator; This is connected to multiple predetermined junction points between stator and rotor and carries out; Each junction point is relevant with the position, angle of the rotor with respect to stator; In the different predetermined sequences of described junction point, rotor has part rotation clockwise or counterclockwise at least, there is a main air outlet described the first rotor sector, connecting passage along its whole extended length, and the angular length of the first sector at least equals the angular length of described stator sections; There is a suction port described the second rotor sections, and connecting passage flows in a kind of pattern therein; There is a suction port described third trochanter sector, and connecting passage flows in another a kind of pattern; Each runner suction port has a sidepiece, and the suction port runner of the single head piece of described stator and described rotor is coupled together; Described sidepiece is on two sides, described the first rotor sector, and from wherein separating.
2. rotary disc valve as claimed in claim 1, is characterized in that, described stator has a common suction port, is arranged in described stator sections; And at least one common air outlet.
3. rotary disc valve as claimed in claim 2, is characterized in that, described the first rotor sector comprises a primary outlet runner, and described the second rotor sections comprises a main-inlet runner; Two runners all extend along the whole length of respective sectors.
4. rotary disc valve as claimed in claim 3, is characterized in that, described third trochanter sector comprises an additional suction port and an air outlet; The described additional flow channel that goes out extends along the whole length of the 3rd sector.
5. rotary disc valve as claimed in claim 1, is characterized in that, described stator has a main common air outlet and at least one additional air outlet.
6. rotary disc valve as claimed in claim 4, is characterized in that, inflates suction port before inflating air outlet and one before described third trochanter sector comprises one; Described front inflation air outlet and front inflation suction port connect between described single head piece.
CN201420010382.1U 2014-01-08 2014-01-08 Multiport rotating disc valve Expired - Lifetime CN203757055U (en)

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Application Number Priority Date Filing Date Title
CN201420010382.1U CN203757055U (en) 2014-01-08 2014-01-08 Multiport rotating disc valve

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Application Number Priority Date Filing Date Title
CN201420010382.1U CN203757055U (en) 2014-01-08 2014-01-08 Multiport rotating disc valve

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CN203757055U true CN203757055U (en) 2014-08-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111279049A (en) * 2017-10-29 2020-06-12 韦特福特科技控股有限责任公司 Rotary disk valve for rotary guiding tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111279049A (en) * 2017-10-29 2020-06-12 韦特福特科技控股有限责任公司 Rotary disk valve for rotary guiding tool

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Granted publication date: 20140806