CN107131326A - Switching valve - Google Patents
Switching valve Download PDFInfo
- Publication number
- CN107131326A CN107131326A CN201710547213.XA CN201710547213A CN107131326A CN 107131326 A CN107131326 A CN 107131326A CN 201710547213 A CN201710547213 A CN 201710547213A CN 107131326 A CN107131326 A CN 107131326A
- Authority
- CN
- China
- Prior art keywords
- hole
- piston
- input channel
- channel
- passage
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims abstract description 44
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 57
- 230000007704 transition Effects 0.000 description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- 231100001261 hazardous Toxicity 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UGQMRVRMYYASKQ-KQYNXXCUSA-N Inosine Chemical compound O[C@@H]1[C@H](O)[C@@H](CO)O[C@H]1N1C2=NC=NC(O)=C2N=C1 UGQMRVRMYYASKQ-KQYNXXCUSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/02—Valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The present invention relates to switching valve.The connection of two input channels the equal regular supply fluid of fluid source and piston be in first state when, when the Fluid pressure in the first input channel can be more than the Fluid pressure in the second input channel, spacing block moves to two input channels of connection and both air pressure insides is tended to be balanced to the left, and piston can be stably maintained at first state.And when piston is in the second state, when the Fluid pressure in the second input channel can be more than the Fluid pressure in the first input channel, when spacing block is moved right to cut-off through hole, piston can be moved right in the presence of pressure difference to first state.When cutting off fluid source of second input channel with supplying fluid for it, piston can move to the second state to the left in the presence of pressure difference.So using the switching valve of the present invention, while ensure that fluid source switching is smooth, that is, ensure that the stability of second fluid source supply fluid, will not being also mixed into external fluid.
Description
Technical field
The present invention relates to switching valve.
Background technology
Positive-pressure air respirator at this stage includes being provided with air entry and outlet valve on gas cylinder and mask, mask.
Air entry is connected by pipeline with gas cylinder, is connected with the first check valve of the air inlet towards gas cylinder, outlet valve and is set on pipeline
Air inlet is equipped with towards the second check valve of user's face.User bears gas cylinder, and the first check valve is opened gas during air-breathing
Gas feeding respiratory tract in bottle, the second check valve is opened and the air-flow of exhalation is discharged through outlet valve during expiration.
But because gas cylinder volume is limited, so its pot life is shorter, a series of inconvenience can be caused to user of service.With
Exemplified by 6.8 liters/300 kilograms of gas cylinder, 2040 liters of gas can be stored, is calculated by the respiratory capacity of every point of 30L/ per capita, only supplies 68
Minute.This is theoretical use time, because positive-pressure air respirator is commonly used in poisonous and hazardous environment, and is used
Personnel are to be engaged in ass work in such circumstances to move mostly.Because activity is big, nervous, user of service's individual is different, need to also enter
Enter that sky will have been dressed before danger zone and exhale the reasons such as device, cause the empty time used for exhaling device in hazardous environment general not
Can be more than 30 minutes.
This shortcoming of air respiratorresuscitator causes following inconvenience to user of service：
One is that user of service will often travel to and fro between Polluted area and normal region and change gas cylinder, causes inefficiency and not
Necessary physical demands；And air respiratorresuscitator is typically sealed in biochemical defence suit, so needing to take off chemical defence when changing gas cylinder
Clothes, this can waste the plenty of time.
Two be Polluted area than it is larger when, it is impossible to be deep into nucleus and the work such as rescued, speedily carried out rescue work.
Design external gas source is contemplated that in design to supplement the problem of internal gas cylinder air demand is not enough.Add external gas source
After need to consider between two gas cylinders the problem of switch.Not influence user to breathe, do not require nothing more than supply gas cylinder between switch it is suitable
Freely, ambient atmos will not be mixed into supply loop, also require that supply gas cylinder will not be past with breathing when user breathes
Multiple switching.Thus needing to design a kind of can meet the switching valve of above-mentioned use demand.
The content of the invention
Switch smooth and high stability switching valve it is an object of the invention to provide a kind of state.
To achieve the above object, switching valve of the invention uses following technical scheme：
The first input channel, the second input channel, output channel and connection first is offered on switching valve, switching valve to input
It is further opened with connecting the through hole and the right passage of output channel on the through hole of passage and the second input channel, switching valve and a left side is logical
Road, left and right passage is not connected, and piston is sealed and installed with through hole guiding movement, and the length of piston is less than between left and right passage
Distance, piston move right to its outer peripheral face block the aperture of right passage along when i.e. in the first input channel of closure with exporting
The first state of passage, the second input channel of connection and output channel, is moved to the left the aperture that its outer peripheral face blocks left passage
Along when in the second input channel of closure with output channel, connect the second state of the first input channel and output channel；It is living
The flow-guiding channel of the first input channel of connection and the second input channel, a left side for the input channel of direction second of piston are provided with beyond the Great Wall
End is provided with the shoulder hole connected with the flow-guiding channel, and shoulder hole includes the big hole section of left end and the aperture section of right-hand member, described
The spacing block of direction slip can be extended along by being provided with aperture section, and spacing block has with the left port of aperture section along shape adaptation
It is used to prevent to separate to be additionally provided with the left of spacing block on the seal face of the first input channel and the second input channel, shoulder hole
Only the spacing block deviates from the block of the aperture section.
The block includes the hollow nut of the macropore intersegmental part installed in shoulder hole, and the right side of the nut is used for
Block spacing block.
The first spring that left end can stretch in left-right direction is installed, the spacing block is installed on the first spring in aperture section
Left end.
The spacing block is first decorative pearl on top of an official cap that diameter is more than aperture section diameter.
The through hole is the shoulder hole that left sector hole footpath is more than right sector hole footpath, the right-hand member bottom hole formation gear edge of left sector hole, piston
Outer peripheral face on be provided with for keeping off the Stop structure that coordinates along block with described.
Switching valve includes valve body, and the through hole is opened in the middle part of valve body and extended in left-right direction, and the left end of through hole connects
External fluid source joint is connected to, the right-hand member of through hole is connected with internal flow source joint, and the lower end of valve body is provided with out splice going splice；Institute
State the first input channel in left-right direction to extend and be opened on the joint of internal flow source, second input channel is along right and left
To extending and being opened on external fluid source joint, the output channel is vertically extending and is opened on out splice going splice；
The lower channel extended in left-right direction is further opened with the bottom of through hole on valve body, the output channel is connected with lower channel, left,
Right passage is arranged between through hole and lower channel and vertically extending.
The left and right passage is to be provided with second spring in the stepped hole that epimere aperture is less than hypomere aperture, big hole section
And second decorative pearl on top of an official cap, the upper end of second spring can stretching motion along the vertical direction, second decorative pearl on top of an official cap is arranged at second spring upper end
And its diameter is less than the aperture of upper sector hole with can be by the aperture of aperture along institute's block.
The valve body includes upper body and lower body, and the upper sector hole of through hole, the upper sector hole of left passage and right passage is equal
It is opened in upper body, the lower sector hole of lower channel, the lower sector hole of left passage and right passage is opened in lower body.
Annular groove is provided with the outer peripheral face of the piston, annular groove is built-in with the week for realizing piston and through hole circumferential seal
To sealing ring, set fluted on the left side and/or right side of piston, the respective end that piston is protruded in outer end is provided with groove
The damping washer that face is set.
Beneficial effects of the present invention are as follows：The switching valve of the present invention when in use, in the fluid of two input channels connection
When the equal regular supply fluid in source and piston are in first state, as user absorbs the fluid in the second input channel, first
Fluid pressure in input channel can be more than the Fluid pressure in the second input channel, now spacing block under differential pressure action to the left
The seal face for moving to spacer block departs from the left port edge of aperture section, two input channel via through holes connections and makes both air pressure insides
Tend to be balanced, piston can be stably maintained at first state, be now delivery outlet by the fluid source being connected with the second input channel
Fluid needed for supply.And when piston is in the second state, as user absorbs the fluid in the first input channel, second is defeated
Enter the Fluid pressure that the Fluid pressure in passage can be more than in the first input channel, now spacing block is transported to the right under differential pressure action
Move to seal face and compress the left port edge of aperture section and be separated two input channels, piston can be in the presence of pressure difference
Move right to first state, now by with fluid source that the second input channel is connected for needed for delivery outlet supply fluid.When cutting
When disconnected second input channel is with the fluid source for its supply fluid, with the further increase of pressure difference in two input channels, piston
The second state can be moved to the left in the presence of pressure difference.So using the switching valve of the present invention, it is only necessary to by what is be convenient for carrying
First fluid source is connected to the first input channel, the second fluid source that position is fixed is connected into the second input channel, you can real
Supply fluid is stablized by second fluid source under existing normality, in emergency situations the changeable shape for first fluid source supply fluid
State.While ensure that fluid source switching is smooth, that is, the stability of second fluid source supply fluid is ensure that, will not be also mixed into
External fluid.
Brief description of the drawings
Fig. 1 is the structural representation of one embodiment of the switching valve of the present invention；
Fig. 2 is the structural representation of the air respiratorresuscitator for the switching valve for using Fig. 1 in a state of use.
Embodiment
The concrete structure of the switching valve of the present invention is as shown in figure 1, using the air respiratorresuscitator of the switching valve in use state
Under structure it is as shown in Figure 2.Air respiratorresuscitator includes being provided with air entry and outlet valve on mask 2, mask 2, and air entry leads to
Cross switching valve 3 and be connected with the first pipeline 4 and the second pipeline 5, the end of the first pipeline 4 is stretched into internal gas cylinder 1, the second pipeline 5
End stretch into external gas cylinder 6.Air entry connects switching valve 3 by the 3rd pipeline 7.Air inlet direction is provided with air entry
Air inlet is provided with first check valve of switching valve 3, outlet valve towards the second check valve of user's face.
Switching valve 3 is two-position three-way valve, and with two input ports and an output channel, output channel connects the 3rd pipeline 7,
First input channel connects the first pipeline 4, and the second input channel connects the second pipeline 5.Piston be moved to connection the first input channel and
During output channel, the inside gas cylinder 1 connected from the first pipeline 4 is supplied to air entry.Piston is moved to the second input channel of connection
During with output channel, the external gas cylinder 6 connected from the second pipeline 5 is supplied to air entry.
When in use, born in the biochemical defence suit of user of service has internal gas cylinder 1 to air respiratorresuscitator, and external gas cylinder 6 passes through
Two pipelines 5 are arranged at appointed place and by staff on duty and replacing gas cylinder.Because the length of the second pipeline 5 is more than the first pipeline 4
Length, so after user of service leaves appointed place, can pass through switch transition valve in the length range of the second pipeline 5
3 make external gas cylinder 6 be supplied to user.When running into special circumstances, user of service can make the first input by switch transition valve 3
Passage is connected with output channel, is now supplied from internal gas cylinder 4 to user.
The supply air pressure of internal gas cylinder 1 and external gas cylinder 6 is all higher than atmospheric pressure, so there is the damaged situation of pipeline
Toxic gas in lower outside air is also difficult to enter in pipeline, is conducive to ensureing user's personal safety.
The switching valve 3 of the present invention includes offering 31 liang of extension and insertion valve body in left-right direction on valve body 31, valve body 31
The through hole 311 at end, the left end of through hole 311 is provided with external fluid source joint 32, and the right-hand member of through hole 311 is provided with internal flow source
Correspondence offers extension and and through hole in left-right direction on joint 33, external fluid source joint 32 and internal flow source joint 33
The second input channel 321 and the first input channel 331 of 311 connections.The lower end of valve body 31 is provided with output channel 341
Out splice going splice 34, the bottom of valve body 31 offers the lower channel 312 extended in left-right direction, and lower channel 312 is parallel with through hole 311
Set.It is further opened with connecting the left passage 313 and right passage 314 of lower channel 312 and through hole 311 on valve body 31, left and right passage is left
Right septum is set and vertically extending.Left and right passage is the larger stepped hole in hypomere aperture, and is set in big hole section
Have can vertically extending motion spring top bead, second decorative pearl on top of an official cap is arranged on the upper end of second spring and has a diameter larger than aperture
The aperture of section, so the compressible aperture in aperture section cuts off respective channel along place after second decorative pearl on top of an official cap is moved upwards.
For ease of the processing of valve body 31, valve body 31 includes upper body and lower body, through hole 311, left passage 313 it is upper
The upper sector hole of sector hole and right passage 314 is opened in upper body, lower channel 312, the lower sector hole and right passage of left passage 313
314 lower sector hole is opened in lower body.Lower body is fixed by screws in below upper body.
It is sealed and installed with piston 35, the middle part of piston 35 is offered in left-right direction the middle part guiding movement of through hole 311
Extension and the flow-guiding channel 351 for running through the left and right ends face of piston 35, the left end of piston 35 are further opened with connecting with flow-guiding channel 351
Shoulder hole 352, shoulder hole 352 and the coaxial line of flow-guiding channel 351 are set and left sector hole footpath is more than its right sector hole footpath.Ladder
Be provided with the aperture section in hole 352 right-hand member be fixed on bottom hole, left end can stretching motion in left-right direction the first spring 353, rank
First decorative pearl on top of an official cap 354 is installed in the big hole section in terraced hole 352.The diameter of first decorative pearl on top of an official cap 354 is more than the diameter of aperture section, thus at it
Move right to block after a trip and switch through hole 311 by middle part along place in the aperture of aperture section.Shoulder hole 352
Left end is additionally provided with the block 356 for preventing first decorative pearl on top of an official cap 354 from deviating from shoulder hole.Specifically inserted in the left end of big hole section
Nut equipped with inner hollow, the internal diameter of nut is less than the diameter of first decorative pearl on top of an official cap 354, thus nut is to form block 356.
In the case that internally gas cylinder 1 is normally supplied with external gas cylinder 6, inhaled when user passes through internal flow source joint
After gas, the pressure in the first input channel 331 is reduced, and the pressure in the second input channel 321 can be more than the first input channel 331
Interior pressure, first decorative pearl on top of an official cap 354 can move right and compress the first spring 353 under pressure, until first decorative pearl on top of an official cap 354 is pressed
Tightly in the aperture Yan Chu of aperture section, now the second input channel 321 is separated with the first input channel 331 by piston, and piston 35 exists
Moved right in the presence of pressure difference to the right passage 314 of the complete block of its outer peripheral face, now through hole 311 and right passage 314 are by piston
35 separate, and are supplied from external gas cylinder to user.
Spacing for the mobile carry out to piston 35 to the right, through hole 311 is the shoulder hole that left section of diameter is more than right section of diameter, right
The aperture of sector hole is along forming gear along 315, and piston 35 also includes two sections, and left section of diameter is more than right section of diameter, left section with right section
Transition shoulder 355 is adapted to by its block with gear along 315 end surface shape.Transition shoulder 355 is formd for being kept off with gear along 315
The Stop structure only coordinated.
Left and right compartment of terrain is provided with twice annular groove on the outer peripheral face of piston 35, and one of annular groove is placed in left section, and one of annular groove is put
In right section.Annular groove is built-in with the circumferential seal circle for realizing piston and through hole circumferential seal, the internal diameter and ring of circumferential seal circle
The groover rot diameter of groove is adapted, external diameter is adapted with the aperture of corresponding position through hole.It is also equipped with the right side of piston 35
The damping washer that the corresponding end-faces of outer end protrusion piston are set is provided with groove, groove.
Internally in the case of the normal supply of gas cylinder 1 and external gas cylinder 6, when user by external gas cylinder 6 sucks sky
During gas, the air pressure in the second input channel 321 will reduce, and now the air pressure in the first input channel 331 can be more than external gas source
Air pressure in passage 331, the first spring 353 can in the presence of pressure difference and selfer power returning quickly and by first decorative pearl on top of an official cap
354 are pushed into the aperture edge away from aperture section to the left, and now flow-guiding channel 351, which is opened, makes the first input channel 331 and second defeated
Enter passage 321 to connect.After connection, with internal gas cylinder 1 and the lasting supply of external gas cylinder 6, the pressure of the left and right ends of piston 35
Difference disappears without again to left movement, and through hole 311 and right passage 314 keep the state separated by piston 35, and still by outer
Gas cylinder is connect to supply to user.
When the setting of first spring 353 to make through the external air-breathing of gas cylinder 6 air pressure reduction in second input channel 321,
First decorative pearl on top of an official cap 354 can under the resilient force of the first spring 353 rapid return and to connect the second input channel 321 and first defeated
Enter passage 331, it is to avoid the switching for the supply source of the gas that piston 35 is moved to left and caused.In other words, the setting of the first spring 353 is protected
In the case of having demonstrate,proved the normal supply of gas cylinder 1 internally and external gas cylinder 6, the gas required for user is by external gas cylinder
6 supplies, without cyclic switching between gas cylinder 1 and external gas cylinder 6 internally, are naturally also advantageous for improving making for switching valve 3
The quality of filling gas of air respiratorresuscitator with the life-span and using switching valve 3.
In other embodiments, the first spring can also be saved, but the first decorative pearl on top of an official cap guiding movement is directly arranged on to big
In hole section.Certainly, first decorative pearl on top of an official cap can also be replaced by the spacing block of other shapes, it is only necessary to which spacing block has the left side with aperture section
Port is along shape adaptation to block the seal face of the opening's edge.
To switch to the state supplied by internal gas cylinder, then need the second input channel 321 and external gas cylinder is complete
Disconnect, prevent external gas cylinder from being supplied again to the second input channel 321, it is so logical in the first input channel 331 and the second input
Piston 35 can move to its left end to the left under differential pressure action and be connect by external fluid source after pressure difference reaches to a certain degree between road 321
First 32 blocks.Now the outer peripheral face of the left end of piston 35 can block the upper port edge of left passage 313 completely, now through hole 311 with
Left passage 313 is separated by piston, and is supplied from internal gas cylinder to user.
This form design of switching valve 3 causes user correctly to wear after air respiratorresuscitator, as user starts
Breathing, piston 35 will move to right to cut-out the first input channel 331 and output channel 341, connect the second input channel 321 with it is defeated
Go out under the first state of passage 341, first state from external gas cylinder to user's supply without consuming tolerance in internal gas cylinder 1.
And when running into emergency case, but can be by closing external gas cylinder 6, now with the breathing of user, piston 35 can be moved to left
To cut-out the second input channel 321 and output channel 341, connect the second shape of the first input channel 331 and output channel 341
Supplied under state, the second state from internal gas cylinder 1 to user.
In other embodiments, switching valve of the invention can be additionally used in the water conservancy diversion occasion of other fluids such as water.
Claims (9)
1. switching valve, it is characterised in that：The first input channel, the second input channel, output channel and company are offered on switching valve
It is further opened with connecting the right side of the through hole and output channel on the through hole of logical first input channel and the second input channel, switching valve
Passage and left passage, left and right passage are not connected, and are sealed and installed with piston in through hole guiding movement, the length of piston be less than it is left,
The distance between right passage, piston move right to its outer peripheral face block the aperture of right passage along when i.e. in the input of closure first
Passage with output channel, connect the first state of the second input channel and output channel, be moved to the left the closure of its outer peripheral face left
The aperture of passage along when in closure the second input channel and output channel, connect the of the first input channel and output channel
Two-state；The flow-guiding channel of the first input channel of connection and the second input channel is provided with piston, the direction second of piston is defeated
The left end for entering passage is provided with the shoulder hole connected with the flow-guiding channel, shoulder hole include left end big hole section and right-hand member it is small
The spacing block of direction slip can be extended along by being provided with hole section, the aperture section, and spacing block has the left port with aperture section
Also set in the left side of spacing block along shape adaptation with separating on the seal face of the first input channel and the second input channel, shoulder hole
It is equipped with for preventing the spacing block from deviating from the block of the aperture section.
2. switching valve according to claim 1, it is characterised in that：The block is included in the big hole section of shoulder hole
The hollow nut in portion, the right side of the nut is used for block spacing block.
3. switching valve according to claim 1, it is characterised in that：Left end is provided with aperture section to be stretched in left-right direction
The first spring, the spacing block is installed on the left end of the first spring.
4. switching valve according to claim 3, it is characterised in that：The spacing block is that diameter is more than the of aperture section diameter
One decorative pearl on top of an official cap.
5. switching valve according to claim 1, it is characterised in that：The through hole is the rank that left sector hole footpath is more than right sector hole footpath
It is provided with terraced hole, the right-hand member bottom hole formation gear edge of left sector hole, the outer peripheral face of piston for keeping off the gear coordinated along block with described
Only structure.
6. according to switching valve according to any one of claims 1 to 5, it is characterised in that：Switching valve includes valve body, the through hole
It is opened in the middle part of valve body and extends in left-right direction, the left end of through hole is connected with external fluid source joint, and the right-hand member of through hole connects
Internal flow source joint is connected to, the lower end of valve body is provided with out splice going splice；First input channel extend in left-right direction and
It is opened on the joint of internal flow source, second input channel extends and is opened in external fluid source joint in left-right direction
On, the output channel is vertically extending and is opened on out splice going splice；Bottom on valve body in through hole is further opened with edge
The lower channel of left and right directions extension, the output channel is connected with lower channel, and left and right passage is arranged between through hole and lower channel
And it is vertically extending.
7. switching valve according to claim 6, it is characterised in that：The left and right passage is that epimere aperture is less than hypomere
Second spring and second decorative pearl on top of an official cap are provided with the stepped hole in aperture, big hole section, the upper end of second spring can stretch along the vertical direction
Motion, second decorative pearl on top of an official cap is arranged at second spring upper end and its diameter and is less than the aperture of upper sector hole with can be by the hole of aperture
Opening's edge institute block.
8. switching valve according to claim 7, it is characterised in that：The valve body includes upper body and lower body, leads to
The upper sector hole in hole, the upper sector hole of left passage and right passage is opened in upper body, lower channel, the lower sector hole of left passage and the right side
The lower sector hole of passage is opened in lower body.
9. according to switching valve according to any one of claims 1 to 5, it is characterised in that：Set on the outer peripheral face of the piston
There is annular groove, annular groove is built-in with the circumferential seal circle for realizing piston and through hole circumferential seal, the left side of piston and/or right-hand member
Set fluted on face, the damping washer that the corresponding end-faces of outer end protrusion piston are set is provided with groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710547213.XA CN107131326A (en) | 2017-07-06 | 2017-07-06 | Switching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710547213.XA CN107131326A (en) | 2017-07-06 | 2017-07-06 | Switching valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107131326A true CN107131326A (en) | 2017-09-05 |
Family
ID=59737694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710547213.XA Pending CN107131326A (en) | 2017-07-06 | 2017-07-06 | Switching valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107131326A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701360A (en) * | 2019-09-13 | 2020-01-17 | 上海空间推进研究所 | Reversing three-way valve with quick connection function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB964787A (en) * | 1959-10-28 | 1964-07-22 | Roberto Galeazzi | Improvements in or relating to breathing equipment |
| CN201551751U (en) * | 2009-04-22 | 2010-08-18 | 上海宝亚安全装备有限公司 | Automatic switching escape device |
| CN103182152A (en) * | 2013-04-03 | 2013-07-03 | 抚顺抚运安仪救生装备有限公司 | Positive pressure air respirator for emergency rescue |
| CN203169857U (en) * | 2013-04-03 | 2013-09-04 | 抚顺抚运安仪救生装备有限公司 | Positive pressure type air breathing apparatus for emergency rescue |
| CN205859227U (en) * | 2016-08-03 | 2017-01-04 | 张益轩 | Liquid gas pressure guides switching valve |
| CN206889755U (en) * | 2017-07-06 | 2018-01-16 | 轩维技术（北京）有限公司 | Switching valve |
-
2017
- 2017-07-06 CN CN201710547213.XA patent/CN107131326A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB964787A (en) * | 1959-10-28 | 1964-07-22 | Roberto Galeazzi | Improvements in or relating to breathing equipment |
| CN201551751U (en) * | 2009-04-22 | 2010-08-18 | 上海宝亚安全装备有限公司 | Automatic switching escape device |
| CN103182152A (en) * | 2013-04-03 | 2013-07-03 | 抚顺抚运安仪救生装备有限公司 | Positive pressure air respirator for emergency rescue |
| CN203169857U (en) * | 2013-04-03 | 2013-09-04 | 抚顺抚运安仪救生装备有限公司 | Positive pressure type air breathing apparatus for emergency rescue |
| CN205859227U (en) * | 2016-08-03 | 2017-01-04 | 张益轩 | Liquid gas pressure guides switching valve |
| CN206889755U (en) * | 2017-07-06 | 2018-01-16 | 轩维技术（北京）有限公司 | Switching valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701360A (en) * | 2019-09-13 | 2020-01-17 | 上海空间推进研究所 | Reversing three-way valve with quick connection function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EG24236A (en) | Respirators | |
| CN203943996U (en) | A kind of breather valve | |
| CN206889755U (en) | Switching valve | |
| CN107131326A (en) | Switching valve | |
| CN205964222U (en) | Goat oxygen inhalation mask | |
| CN206252750U (en) | Nose cup with breather valve and the respiration filtering device including nose cup | |
| CN1809400B (en) | Pressure regulator assembly | |
| CN206880956U (en) | Novel air respirator | |
| CN106955431A (en) | Eebd | |
| CN103263734B (en) | Breathing protection system for mine | |
| CN203677768U (en) | Positive pressure oxygen breathing apparatus for mines | |
| CN203029855U (en) | Water layer separated type air purification mask | |
| CN103182152B (en) | Emergency management and rescue positive-pressure air respirator | |
| CN104906718B (en) | Fire-fighting equipment | |
| CN203169857U (en) | Positive pressure type air breathing apparatus for emergency rescue | |
| CN106310551A (en) | Personal portable respirator | |
| CN104225744B (en) | A kind of Portable positive pressure automatic resuscitator | |
| CN203139431U (en) | Water level separated type air purifying respirator | |
| CN202105344U (en) | Multipurpose connector for respirators | |
| CN206342765U (en) | The dual medicinal atomized breathing equipment of gasbag-type | |
| CN104056373A (en) | Respiratory protection system | |
| CN202070044U (en) | Isolated-type carbon dioxide absorption device for positive pressure oxygen breather | |
| CN202437898U (en) | Breathing device | |
| CN107158593A (en) | A kind of air can respirator | |
| CN202982980U (en) | Breathing mask worn for long-time work in toxic and restricted space |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170905 |
|
| RJ01 | Rejection of invention patent application after publication |