CN203264078U - Air suction valve with ambient air and air-bottle air switching-over function and breathing mask - Google Patents
Air suction valve with ambient air and air-bottle air switching-over function and breathing mask Download PDFInfo
- Publication number
- CN203264078U CN203264078U CN 201320281048 CN201320281048U CN203264078U CN 203264078 U CN203264078 U CN 203264078U CN 201320281048 CN201320281048 CN 201320281048 CN 201320281048 U CN201320281048 U CN 201320281048U CN 203264078 U CN203264078 U CN 203264078U
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- matrix
- air
- spool
- inlet valve
- gas cylinder
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Abstract
The utility model discloses an air suction valve with the ambient air and air-bottle air switching-over function, and a breathing mask. The air suction valve comprises a base body, a valve core, an elastic part and a hollow button shaft, wherein the base body is provided with an axial inner stepped hole, a plurality of bosses arranged axially are evenly distributed on the circumferential surface of the inner wall of a small hole of the inner stepped hole, grooves are formed between the bosses, the front end of each boss is provided with an inclined surface and an axial limiting structure, and the part, corresponding to a large hole of the inner stepped hole, of the wall of the base body is provided with a ventilation hole communicated with the outside; the valve core is arranged in the small hole of the inner stepped hole of the base body, the valve core is provided with an end cover and an air inlet hole, a plurality of protrusions are evenly distributed on the outer circumferential surface of the valve core, and each protrusion is provided with an inclined surface structure matched with the inclined surface of each boss of the base body; the elastic part is arranged between the end cover and the base body; the hollow button shaft is arranged in the small hole and moves axially, the hollow button shaft is arranged at the front end of the valve core in the axial direction, the hollow portion of the button shaft is an air inlet channel, and the circumferential edge of the bottom end of the button shaft is a zigzag edge. The valve core can be switched over between a first position and a second position.
Description
Technical field
The utility model relates to a kind of valve, relates in particular to a kind of valve of breathing apparatus.
Background technology
Aerial respiration equipment is equipped as a kind of respiratory protection; now be widely used in heavy industry; environmental project; the fields such as the energy and ocean industry; be used for fireman and relevant staff leak in fire, harmful substance, full of smoke, lack under the abominable operating condition such as oxygen, carry out a series of rescue works such as fire source detecting, fire extinguishing processing, rescue and relief work.
Aerial respiration equipment is take compressed air as air supply source, and what of air demand are the size of gas cylinder determined.Between interim face to face during long rescue work, really can increase air demand by the volume that enlarges gas cylinder, but also can increase user's load simultaneously, be unfavorable for the expansion of rescue work, therefore, take full advantage of surrounding air and rationally use the gas cylinder air to become to improve one of short measure breathing apparatus service time.
Valve plays a part to open and close the gas passage as the critical component of aerial respiration equipment in whole gas transport process.If can be by the design of valve, make breathing apparatus in the situation that environmental condition allows, utilize surrounding air, reduce unnecessary gas cylinder gas, in the situation that environmental condition is polluted, use the gas cylinder air, play protective action, namely by the mutual switching between " breathing environment air " and " breathing the gas cylinder air ", just can increase to a certain extent the service time of gas cylinder use gas.
The utility model content
One of the purpose of this utility model is to provide a kind of inlet valve with surrounding air and gas cylinder air handoff functionality, this inlet valve can be realized opening and closing as required, thereby makes the source of the gas that offers inlet valve switch between surrounding air and gas cylinder air.
In order to achieve the above object, the utility model provides a kind of inlet valve with surrounding air and gas cylinder air handoff functionality, and it comprises:
One matrix, it has an axial inner bore of step, aperture inwall periphery along this inner bore of step is evenly equipped with the boss that several axially arrange, form groove between two adjacent boss, the front end of each boss all has an inclined-plane and an axial limit structure, has the passage with extraneous conducting on base wall corresponding to the macropore of inner bore of step;
One spool, it is located in the aperture of inner bore of step of described matrix, and this spool has an end cap, has air admission hole on spool, is evenly equipped with some projections on the outer circumference surface of this spool, and each projection all has a ramp structure that is complementary with the inclined-plane of matrix boss;
One elastic component is located between described spool end cap and matrix, to apply an axial force;
The push button shaft of one hollow, it can be located in the aperture of matrix inner bore of step with moving axially, and in axial direction is located at the front end of spool, and the hollow bulb of this push button shaft is inlet channel, and the circumferential edge edge, bottom of this push button shaft is the zigzag edge;
this zigzag edge acts on the ramp structure of spool in the moving axially of push button shaft, so that one displacement of spool axial feed also circumferentially turns over an angle, making spool leave a primary importance of matrix inner bore of step step surface and end cap enclosing cover at end cap is located between the second place on step surface and switches, the air admission hole of this spool is in the passage conducting of primary importance and matrix, the ramp structure of this spool projection contacts with the inclined-plane coupling of matrix boss in primary importance, and it is spacing by the axial limit structure of matrix that this is raised in primary importance, the second place that is raised in of this spool is located in the groove of matrix.
In the inlet valve with surrounding air and gas cylinder air handoff functionality described in the utility model, spool has two diverse locations, and when spool is in primary importance, namely spool overcomes the axial force of elastic component and leaves matrix, and at this moment, inlet valve is opened; When spool is in the second place, namely elastic component to spool apply axial force with its top to matrix, at this moment, inlet valve cuts out.When inlet valve was connected with breathing apparatus, inlet valve was opened, and surrounding air enters breathing apparatus; Inlet valve cuts out, and switches to gas cylinder air air feed.
when pressing push button shaft, push button shaft overcomes elastic component to its axial force that applies and constantly near the matrix bottom, the zigzag edge of push button shaft contacts with the projection of spool, the axial force of push button shaft acts on ramp structure with matching by the zigzag edge, and this axial force is resolved into an axial thrust load and a tangential force, make spool produce in the axial direction a displacement and circumferentially turn over an angle, after the external force of pressing push button shaft is withdrawn, spool is subject to the axial force of elastic component and replys, the ramp structure of projection contacts with the inclined-plane coupling than small stair endoporus convex platform that is arranged on matrix, the axial limit structure of being located at equally than small stair endoporus convex platform simultaneously blocks, in this state, spool is in primary importance, the end cap of spool leaves matrix, the air admission hole of being located on spool is logical with the passage conductance of being located on matrix, due to the inlet channel of push button shaft all the time with the external environment conducting, so just surrounding air can be inputted in breathing apparatus.when again pressing push button shaft, push button shaft overcomes elastic component to its axial force that applies and again constantly near the matrix bottom, the axial force of push button shaft still acts on ramp structure with matching by the zigzag edge, and this axial force is resolved into an axial thrust load and a tangential force, make spool again produce in the axial direction a displacement and according to again turning over an angle with direction that last time direction of rotation was identical, make in the groove of protruding landing to the matrix on spool, this moment, spool was in the second place under the effect of the axial elastic force of elastic component, the end cap and the matrix that are spool fit tightly, the air admission hole of being located on spool disconnects with the passage gas of being located on matrix, thereby surrounding air is isolated from outside breather valve.
Further, have some axially extended guide ledges on the outer circumference surface of above-mentioned push button shaft, each guide ledges correspondence is arranged in each groove of matrix.
Further, the tail end end of above-mentioned guide ledges also has the bayonet socket that radially outward stretches out, so that push button shaft is not located in matrix with not breaking away from matrix.In order to make push button shaft in use be difficult for dropping in matrix, the setting of bayonet socket has been avoided user's mistake to pull out and has been affected normal use operation.
Further, also be provided with a sealing ring between the end cap of above-mentioned spool and matrix.By setting up potted component in the contact portion of spool end cap and matrix to obtain better sealing effectiveness.
Further, above-mentioned matrix is dismountable end face at the end face near inner bore of step macropore one end.One end of matrix is set to assembling and the maintenance that detachable end face is easy to inlet valve.
Advantageously, the silently nut of above-mentioned dismountable end face for being threaded with matrix.
Alternatively, the axial limit structure of above-mentioned matrix boss is a plane that is connected with above-mentioned inclined-plane.
Need to prove, axial limit structure in the technical program is except above-mentioned plane, can also be other structures that those skilled in that art can expect, another inclined-plane that is connected with the inclined-plane of matrix boss for example, two inclined-planes are oppositely arranged, thereby also can form a bayonet socket of realizing axial limiting.
Alternatively, above-mentioned elastic component is spring.
Correspondingly, another purpose of the present utility model is to provide a kind of breathing mask with surrounding air and gas cylinder air handoff functionality, and it comprises face shield body and at least one inlet valve that is fixed on the face shield body, and this inlet valve has structure mentioned above.
In optimal technical scheme, a pair of inlet valve can be set respectively to realize fully effectively utilizing of surrounding air on the face shield body.
Inlet valve with surrounding air and gas cylinder air handoff functionality described in the utility model switches to realize the open and close of self by controlling spool between two diverse locations, simple structure, and it is convenient to implement.
Compare with existing breathing mask, the beneficial effect with surrounding air and gas cylinder air handoff functionality breathing mask described in the utility model is:
(1) breathing mask can be realized the in time conversion mutually of " surrounding air " and " gas cylinder air " two kinds of breathing states, has effectively utilized the Compressed Gas in gas cylinder;
(2) in the situation that can breathe the external environment air, do not waste the gas cylinder Compressed Gas, reduce the use amount of Compressed Gas in the unit interval, extended the service time of air respiratorresuscitator;
(3) two kinds of breathing state transfer processes only need be pressed push button shaft, need not too much hand motion, and the rescue personnel can be devoted in work on the spot absorbedly.
Description of drawings
Fig. 1 is the structural representation of inlet valve under a kind of embodiment with surrounding air and gas cylinder air handoff functionality described in the utility model.
Fig. 2 is the axial arrangement cutaway view of the inlet valve with surrounding air and gas cylinder air handoff functionality described in the utility model when being in primary importance under a kind of embodiment.
Fig. 3 is the axial arrangement cutaway view of the inlet valve with surrounding air and gas cylinder air handoff functionality described in the utility model when being in the second place under a kind of embodiment.
Fig. 4 is the structural representation with inlet valve matrix under a kind of embodiment of surrounding air and gas cylinder air handoff functionality described in the utility model.
Fig. 5 is the perspective view with inlet valve matrix under a kind of embodiment of surrounding air and gas cylinder air handoff functionality described in the utility model.
Fig. 6 described in the utility modelly has the inlet valve of surrounding air and gas cylinder air handoff functionality at a kind of structural representation of embodiment bottom spool.
Fig. 7 described in the utility modelly has the inlet valve of surrounding air and gas cylinder air handoff functionality at a kind of structural representation of embodiment knob down axle.
Fig. 8 is the structural representation of breathing mask under a kind of embodiment with surrounding air and gas cylinder air handoff functionality described in the utility model.
The specific embodiment
Below in conjunction with Figure of description and concrete embodiment, inlet valve and the breathing mask with surrounding air and gas cylinder air handoff functionality described in the utility model is further explained explanation, yet this explanation does not consist of the improper restriction to technical solutions of the utility model.
As shown in Figure 1, the inlet valve 10 with surrounding air and gas cylinder air handoff functionality in the present embodiment comprises: the matrix 11 with axial inner bore of step, inner bore of step is divided into macropore 110 and aperture 110 ', inwall periphery at aperture 110 ' is evenly equipped with some axially extended boss 111, form groove 112 between two adjacent boss 111, the front end of each boss 111 all has inclined-plane and axial limit structure, has the passage 115 with extraneous conducting on the wall of macropore 110 corresponding to matrix; Spool 12 is arranged in aperture 110 ' and has end cap 121, is provided with air admission hole 122 on spool 12, uniform some projections 123 with ramp structure on the outer circumference surface of spool 12, and the inclined-plane of this ramp structure and matrix boss 111 is complementary; Elastic component 13 is located between the detachable end face of spool end cap 121 and matrix to apply axial force to spool; The push button shaft 14 of hollow can be located in aperture 110 ' with moving axially, and in axial direction be arranged on the front end of spool 12, the hollow space of push button shaft is inlet channel 141, and in its bottom circumferential edge along being provided with zigzag edge 142, have some axially extended guide ledges on the outer circumference surface of push button shaft 14, guide ledges can be arranged in the groove 112 of matrix 11 accordingly.
As shown in Figures 2 and 3, spool 12 exists in matrix 11 and opens and closes two operating positions, spool 12 is primary importance (open position) when end cap 121 leaves in matrix 11 inner bore of step step surface, and spool 12 is the second place (closed position) when end cap 121 is sealed in matrix 11 inner bore of step step surface.
In the technical program, elastic component 13 can be spring, or other apply the flexible member of axial force.
The detachable end face of matrix can be the silently nut 116 that is threaded with matrix 11, or with the end face of matrix snapping, or other the detachable end faces that can expect of those skilled in that art.The setting of detachable end face is assembling and the maintenance for the ease of inlet valve.Certainly, end face and the matrix structure of moulding that also can be processed as one.
In some embodiments, be provided with sealing ring 15 to obtain more good sealing effectiveness between the inner bore of step step surface of the end cap 121 of spool 12 and matrix 11.
Fig. 4 and Fig. 5 show the structure of matrix in one embodiment inlet valve.
Can find out from Fig. 4 and Fig. 5, in this embodiment, the plane 114 that the front end of axially extended boss 111 has inclined-plane 113 and is connected with the inclined-plane, the axial location that plane 114 that should be connected with the inclined-plane is used for limiting the spool projection makes spool can be fixed in primary importance place, formation groove 112 between adjacent two boss 111.Apparently, can also take other structures to realize axial limiting function to the spool projection, such as, front end on the inclined-plane can arrange a blend stop that extends towards surface bottom and fall into formed groove between two boss to limit projection to be subject to the axial force of spring, and the bearing of trend of this blend stop is vertical with the bearing of trend that is connected the plane.Another inclined-plane relative with the inclined-plane perhaps can be set, thereby make two inclined-planes form the bayonet socket of axial limiting.In addition, the quantity of projection of being located at the boss on the matrix inner hole wall and being located at the outer circumference surface of spool can design according to actual conditions, but, it is identical also that both quantity and size setting need to be satisfied the axial displacement stroke that produces at the situation bottom spool that is subject to axial force, and the angle that turns over is identical.
Fig. 6 further shows the inlet valve described in the utility model structure of spool in one embodiment.
As shown in Figure 6, offer air admission hole 122 on the outer circumference surface of spool, projection 123 is arranged on outer circumference surface in uniform way, all has ramp structure 124 on each projection 123, and the inclined-plane 113 of itself and matrix boss 111 is complementary.
Fig. 7 further shows the inlet valve described in the utility model structure of push button shaft in one embodiment.
As shown in Figure 7, for the stability that guarantees that push button shaft moves in the axial direction, simultaneously the rotation on its circumferential direction is limited, have some axially extended guide ledges 143 on the outer circumference surface of push button shaft, groove 112 couplings of itself and matrix 11 shown in Figure 4, the tail end end of guide ledges 143 is provided with the bayonet socket 144 that radially outward stretches out, and they make push button shaft not break away from matrix with the draw-in groove of being located at matrix inner bore of step port when axial direction outwards pulls to coordinating.Shape that guide ledges can adopt multiple and groove to be complementary, for example, as shown in Figure 7, the radial section of guide ledges can be rectangle or class rectangle.
continue to consult Fig. 1-Fig. 3, breathing mask in the present embodiment is dropped in actual the use: when needs breathing environment air, the user presses push button shaft 14, along with push button shaft 14 in axial direction moves right, the zigzag edge 142 of push button shaft 14 presses to the projection 123 of the outer circumference surface of being located at spool 12, when making zigzag edge 142 act on the ramp structure 124 of spool, axial force is resolved into an axial thrust load and a tangential force, make spool 12 produce an axial displacement and circumferentially turn over an angle, after external force is withdrawn from push button shaft 14, push button shaft is subject to the axial force that spring 13 is applied thereto and axially replys left, at this moment, boss inclined-plane 113 contacts with convex slope structure 124 couplings, axial limit structure props up the projection of spool simultaneously, spool is opened like this, and make inlet channel, air admission hole and passage conducting, surrounding air enters breathing mask.when needs are breathed the gas cylinder air, the user presses push button shaft 14 again, the axial force that push button shaft 14 still overcomes spring 13 in axial direction moves right, the ramp structure 124 of spool 12 is subject to an axial thrust load and a tangential force equally under the effect of axial force, make spool 12 again produce axial displacement and turn over an identical angle, after external force is withdrawn from push button shaft 14 again, push button shaft is subject to the axial force that spring 13 is applied thereto and axially is moved to the left, convex slope structure 124 breaks away from inclined-planes 113 and slips in groove 112 between two adjacent boss, spool 12 contacts with matrix 11 sealings and realizes closing, make inlet channel, air admission hole and passage disconnect, inlet valve and surrounding air are isolated, breathing mask switches to the gas cylinder air feed.
Fig. 8 shows the structural representation of breathing mask under a kind of embodiment with surrounding air and gas cylinder air handoff functionality described in the utility model.
As shown in Figure 8, in this breathing mask, inlet valve 10 is located on face shield body 16 by being fixed of matrix 11 and matrix nut.Inlet valve can be set to one, also can be set to a pair of, perhaps more.Due to the structure of inlet valve in breathing mask from mentioned above there is no different, therefore this paper no longer is described in detail at this.
It should be noted that; the above-mentioned explanation of disclosed embodiment makes this area professional and technical personnel to carry out multiple types like changing and revising for the present embodiment apparently; this similar variation is all distortion that those skilled in the art can directly draw or be easy to just associate from the disclosed content of the utility model, all should belong to protection domain of the present utility model.Therefore the utility model can not be subject to the restriction of this embodiment.
Claims (10)
1. inlet valve with surrounding air and gas cylinder air handoff functionality, it comprises:
One matrix, it has an axial inner bore of step, aperture inwall periphery along this inner bore of step is evenly equipped with the boss that several axially arrange, form groove between two adjacent boss, the front end of described each boss all has an inclined-plane and an axial limit structure, has the passage with extraneous conducting on base wall corresponding to the macropore of described inner bore of step;
One spool, it is located in the aperture of inner bore of step of described matrix, and described spool has an end cap, has air admission hole on described spool, be evenly equipped with some projections on the outer circumference surface of described spool, described each projection all has a ramp structure that is complementary with the inclined-plane of matrix boss;
One elastic component is located between described spool end cap and matrix, to apply an axial force;
The push button shaft of one hollow, it can be located in the aperture of matrix inner bore of step with moving axially, and in axial direction is located at the front end of spool, and the hollow bulb of described push button shaft is inlet channel, and the circumferential edge edge, bottom of described push button shaft is the zigzag edge;
described zigzag edge acts on the ramp structure of spool in the moving axially of push button shaft, so that one displacement of spool axial feed also circumferentially turns over an angle, making spool leave a primary importance of matrix inner bore of step step surface and end cap enclosing cover at end cap is located between the second place on step surface and switches, the air admission hole of described spool is in the passage conducting of primary importance and matrix, the ramp structure of described spool projection contacts with the inclined-plane coupling of matrix boss in primary importance, and it is spacing by the axial limit structure of matrix that this is raised in primary importance, the second place that is raised in of described spool is located in the groove of matrix.
2. the inlet valve with surrounding air and gas cylinder air handoff functionality as claimed in claim 1, is characterized in that having some axially extended guide ledges on the outer circumference surface of described push button shaft, and each guide ledges correspondence is arranged in each groove of matrix.
3. the inlet valve with surrounding air and gas cylinder air handoff functionality as claimed in claim 2, is characterized in that, the tail end end of described guide ledges also has the bayonet socket that radially outward stretches out, so that push button shaft is not located in matrix with not breaking away from matrix.
4. the inlet valve with surrounding air and gas cylinder air handoff functionality as claimed in claim 1, is characterized in that, also is provided with a sealing ring between the end cap of described spool and matrix.
5. the inlet valve with surrounding air and gas cylinder air handoff functionality as claimed in claim 1, is characterized in that, the axial limit structure of described matrix boss is a plane that is connected with described inclined-plane.
6. the inlet valve with surrounding air and gas cylinder air handoff functionality as claimed in claim 1, is characterized in that, described elastic component is spring.
7. the inlet valve with surrounding air and gas cylinder air handoff functionality as claimed in claim 1, is characterized in that, described matrix is dismountable end face at the end face near inner bore of step macropore one end.
8. the inlet valve with surrounding air and gas cylinder air handoff functionality as claimed in claim 7, is characterized in that, the silently nut of described dismountable end face for being threaded with matrix.
9. breathing mask with surrounding air and gas cylinder air handoff functionality, it comprises face shield body and at least one inlet valve as described in any one in claim 1-8, described inlet valve is fixed on the face shield body.
10. breathing mask as claimed in claim 9, is characterized in that, described inlet valve is set to two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320281048 CN203264078U (en) | 2013-05-22 | 2013-05-22 | Air suction valve with ambient air and air-bottle air switching-over function and breathing mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320281048 CN203264078U (en) | 2013-05-22 | 2013-05-22 | Air suction valve with ambient air and air-bottle air switching-over function and breathing mask |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203264078U true CN203264078U (en) | 2013-11-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320281048 Withdrawn - After Issue CN203264078U (en) | 2013-05-22 | 2013-05-22 | Air suction valve with ambient air and air-bottle air switching-over function and breathing mask |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203264078U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103285537A (en) * | 2013-05-22 | 2013-09-11 | 上海宝亚安全装备有限公司 | Inhalation valve and breathing mask both with function of switching ambient air and air-bottle air |
-
2013
- 2013-05-22 CN CN 201320281048 patent/CN203264078U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103285537A (en) * | 2013-05-22 | 2013-09-11 | 上海宝亚安全装备有限公司 | Inhalation valve and breathing mask both with function of switching ambient air and air-bottle air |
| CN103285537B (en) * | 2013-05-22 | 2015-06-17 | 上海宝亚安全装备有限公司 | Inhalation valve and breathing mask both with function of switching ambient air and air-bottle air |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131106 Effective date of abandoning: 20150617 |
|
| RGAV | Abandon patent right to avoid regrant |