CN211599645U - Novel one-way valve - Google Patents
Novel one-way valve Download PDFInfo
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- CN211599645U CN211599645U CN202020167612.0U CN202020167612U CN211599645U CN 211599645 U CN211599645 U CN 211599645U CN 202020167612 U CN202020167612 U CN 202020167612U CN 211599645 U CN211599645 U CN 211599645U
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Abstract
A novel one-way valve comprises a valve seat and a valve core, wherein the valve core is arranged on the valve seat, the valve seat comprises an outer ring structure, an inner ring structure is arranged in the outer ring structure, and a plurality of connecting ribs arranged at intervals are fixedly connected between the outer ring structure and the inner ring structure; the valve core comprises a valve core column, one end of the valve core column is provided with an elastic separation blade, the valve core column is arranged in the inner ring structure and matched with the inner ring structure, and the inner side surface of the separation blade is attached to the end surface of the outer ring structure. The utility model discloses in when the interval between outer loop structure and the inner ring structure gets into gas, under the effect of atmospheric pressure, the separation blade outwards warp to open the check valve, avoid the relative disk seat motion of whole case, make the check valve can be opened to relative less atmospheric pressure, reduce the specification requirement to air supply device, practice thrift the cost, and do not use the spring, reduce spare part, be convenient for install, improve work efficiency.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to novel check valve.
Background
Protection devices such as protective head cover can carry out relatively comprehensive protection to medical personnel, be equipped with air supply arrangement outside protection device, air supply arrangement generally includes the motor, the fan, primary filter equipment, lithium cell and circuit board etc, air supply arrangement sends the air into in the protection device, but this kind of filtration form security is poor, do not possess the one-way function of breathing in, and when motor damage or motor did not have the electricity, if the motor in case broke down, or under the circumstances that the battery did not have the electricity, virus or contaminated air still probably got into the human body through the pipeline that the motor is connected, so need install the check valve on protection devices such as protective head cover, improve protection device's security, but present check valve generally includes structures such as disk seat, case, spring, and the structure is complicated, and the installation is loaded down with trivial details.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the utility model provides a novel check valve, it is complicated to solve above-mentioned check valve structure, installs loaded down with trivial details technical problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a novel one-way valve comprises a valve seat and a valve core, wherein the valve core is arranged on the valve seat, the valve seat comprises an outer ring structure, an inner ring structure is arranged in the outer ring structure, and a plurality of connecting ribs arranged at intervals are fixedly connected between the outer ring structure and the inner ring structure; the valve core comprises a valve core column, one end of the valve core column is provided with an elastic separation blade, the valve core column is arranged in the inner ring structure and matched with the inner ring structure, and the inner side surface of the separation blade is attached to the end surface of the outer ring structure.
The spool comprises a first spool part, a second spool part and a third spool part which are arranged in sequence, the outer diameter of the second spool part is larger than that of the first spool part and that of the third spool part, and the second spool part is in interference fit with the inner ring structure.
The second valve core portion being longer than the inner ring structure; the inner side surface of the baffle sheet is contacted with the end surface of the inner ring structure.
The difference between the length of the second valve core part and the length of the inner ring structure is recorded as L, and the difference between the length of the second valve core part and the length of the inner ring structure is recorded as L, wherein the L ranges from 0.3 mm to 0.5 mm.
The separation blade sets up vertically, and the shape of separation blade is circular.
A conical limiting block is arranged between the first valve core part and the second valve core part, and one end of the limiting block, which is close to the separation blade, is larger than one end of the limiting block, which deviates from the separation blade.
The first valve core part, the limiting block, the second valve core part, the third valve core part and the blocking piece are integrally formed and made of silica gel.
The periphery of the valve seat is provided with a plurality of raised rings arranged at intervals.
The length of the outer ring structure is greater than the length of the inner ring structure.
The outer diameter of the baffle plate is larger than the inner diameter of the outer ring structure and smaller than the outer diameter of the outer ring structure.
The utility model discloses a disk seat and case, the case is installed on the disk seat, the one end of valve stem is equipped with and has elastic separation blade, the medial surface of separation blade and the terminal surface laminating of outer loop structure, realize the closure of check valve, when interval between outer loop structure and the inner ring structure gets into gas, under the effect of atmospheric pressure, the separation blade outwards warp, thereby open the check valve, avoid the relative disk seat motion of whole case, make relatively less atmospheric pressure can open the check valve, reduce the specification requirement to air supply device, the cost is saved, and do not use the spring, reduce spare part, and the installation of being convenient for improves work efficiency.
Drawings
FIG. 1 is a schematic view of a protective head cover;
FIG. 2 is a partial cross-sectional view of a protective headgear;
FIG. 3 is a schematic structural diagram (one) of a two-stage filtration device;
FIG. 4 is a schematic structural diagram of a two-stage filtration device (II);
FIG. 5 is an enlarged schematic view at B in FIG. 4;
FIG. 6 is a schematic structural view of the check valve in an open state;
FIG. 7 is a schematic structural view of a valve stem;
FIG. 8 is a schematic view of a valve seat;
FIG. 9 is a schematic structural view of the lower cover;
fig. 10 is a schematic structural view of the upper cover.
Detailed Description
As shown in fig. 1 to 10, a novel check valve comprises a valve seat and a valve core, wherein the valve core is arranged on the valve seat; the valve seat comprises an outer ring structure 574, an inner ring structure 578 is arranged in the outer ring structure 574, the length of the outer ring structure 574 is larger than that of the inner ring structure 578, a plurality of connecting ribs 575 which are arranged at intervals are fixedly connected between the outer ring structure 574 and the inner ring structure 578, and the connecting ribs 575 are uniformly arranged at intervals; the valve core comprises a valve core column, one end of the valve core column is provided with an elastic baffle 571, the valve core column is arranged in the inner ring structure 578 and matched with the inner ring structure 578, the inner side surface of the baffle 571 is attached to the end surface of the outer ring structure 574, and the outer diameter of the baffle 571 is larger than the inner diameter of the outer ring structure 574 and smaller than the outer diameter of the outer ring structure 574.
The blocking sheet 571 is vertically arranged, and the shape of the blocking sheet 571 is circular, but may be other shapes.
The valve core column comprises a first valve core part 576, a second valve core part 572 and a third valve core part 570 which are sequentially arranged, the outer diameter of the second valve core part 572 is larger than that of the first valve core part 576 and that of the third valve core part 570, so that assembly is facilitated, the second valve core part 572 is in interference fit with an inner ring structure 578, the firmness of the valve core column in fit with a valve seat is improved, the second valve core part 572 is longer than the inner ring structure 578, the difference between the length of the second valve core part 572 and the length of the inner ring structure 578 is marked as L, and the range of L is 0.3 mm-0.5 mm, so that observation is facilitated, and the valve; one end of the outer ring structure 574 is aligned with one end of the inner ring structure 578, and the inner side surface of the baffle 571 is in contact with the end surface of the inner ring structure 578, so that the installation is convenient; a conical limiting block 577 is arranged between the first valve core part 576 and the second valve core part 572, the limiting block 577 plays a limiting role, the valve core column is prevented from jumping out, and one end, close to the separation blade 571, of the limiting block 577 is larger than one end, away from the separation blade 571, of the limiting block 577, so that the installation is convenient; the periphery of the valve seat is provided with a plurality of projecting rings 573 arranged at intervals, and the number of the projecting rings 573 is preferably two.
The first valve core part 576, the stopper 577, the second valve core part 572, the third valve core part 570 and the stopper 571 are integrally formed, and are made of silica gel, so that the valve core column can be assembled in the valve seat conveniently, and other rubber materials can be adopted.
The length of the first valve core portion 576 is greater than the length of the inner ring structure 578, so that the first valve core portion 576 can be inserted into the inner ring structure first and then pulled outward, thereby achieving the interference fit between the second valve core portion 572 and the inner ring structure 578.
When air with certain air pressure enters the space between the outer ring structure 574 and the inner ring structure 578, the baffle plate 571 deforms outwards under the action of the air pressure, so that the one-way valve 57 is opened, the whole valve core is prevented from moving relative to the valve seat, the one-way valve can be opened by relatively small air pressure, a spring is not used, parts are reduced, the installation is convenient, and the working efficiency is improved.
In this embodiment, the one-way valve is installed on the protective head cover, the protective head cover further comprises a head cover body 1, a window 7 is arranged at the front part of the head cover body 1, the window 7 is made of a transparent pe sheet, the window 7 is fixedly connected with the head cover body 1, preferably, a large window is adopted, and can display the whole face of a medical worker, so that the medical worker can conveniently observe the window, a tightening fixing device 4 is arranged at the lower part of the head cover body 1, an air supply device 3 is arranged outside the head cover body 1, a primary filtering device is arranged in the air supply device 3, the air supply device 3 further comprises a motor, a fan, a lithium battery and a circuit board, the lithium battery supplies power to the circuit board, the circuit board controls the motor to work, the motor drives the fan to work, the fan sucks air and filters the air through the primary filtering device, the description is omitted for the prior, as shown in fig. 2, a secondary filtering device 5 is arranged in the hood body 1, wherein a in fig. 2 is a splitting track, i.e. a splitting line, the secondary filtering device 5 is preferably fixedly connected in the hood body 1 to avoid shaking in the using process, a breathing tube 2 is arranged between the secondary filtering device 5 and the air supply device 3, and the secondary filtering device 5 is communicated with the air supply device 3 through the breathing tube 2; the hood body 1 is also provided with an exhaust filtering device 6.
The secondary filtering device 5 comprises an upper cover 51 and a lower cover 58, the upper cover 51 is fixedly connected with the lower cover 58, common connection modes such as ultrasonic welding, buckling connection and the like are preferably selected, and a secondary filtering filter element 54 is arranged between the upper cover 51 and the lower cover 58; the upper cover 51 is provided with a first through hole 514 for filtered air to pass through, the lower cover 58 is communicated with the breathing tube 2, and the lower cover 58 is fixedly connected with the head cover body 1.
The secondary filtering element 54 adopts a composite filtering membrane, the structural form of the composite filtering membrane is diversified, and the composite filtering membrane can adopt a first non-woven fabric layer, a first melt-blown fabric layer, a second melt-blown fabric layer, an electrostatic cotton layer and a second non-woven fabric layer which are laminated in sequence from outside to inside; the composite filtering membrane may also adopt a first non-woven fabric layer, a first electrostatic cotton layer, a melt-blown fabric layer, a second electrostatic cotton layer and a second non-woven fabric layer which are laminated in sequence from outside to inside, where outside refers to the side of the secondary filtering element 54 close to the breathing tube 2.
One side that deviates from second grade filter core 54 of lower cover 58 is equipped with protruding post 56, is equipped with the second through-hole in protruding post 56, and fixed connection can be dismantled with respiratory tube 2 to protruding post 56, and common connection forms such as lock connection, threaded connection are preferentially selected for use, can adopt to be equipped with the external screw thread outside protruding post 56, and respiratory tube 2's the one end that is close to protruding post 56 is equipped with the internal thread, respiratory tube 2 and protruding 56 threaded connection of post, and convenient for connection.
One side of lower cover 58 that is close to second grade filtration filter core 54 is equipped with the ladder groove, and second grade filtration filter core 54 sets up on the step 59 of ladder groove, the placing of second grade filtration filter core 54 of being convenient for, and the ladder groove includes upper groove and lower groove, and the lower groove sets up the bottom at the upper groove, and the shape of second grade filtration filter core 54 suits with the shape of upper groove, covers the top of lower groove is whole, and the second through-hole of protruding post 56 communicates with lower groove, upper groove in proper order.
The bottom surface of the side, close to the secondary filter element 54, of the lower cover 58 is provided with lower support ribs 55, the number of the lower support ribs 55 is a plurality, the lower support ribs 55 are uniformly arranged at intervals along the circumferential direction of the lower cover 58, the lower support ribs 55 are in contact with the secondary filter element 54, and the lower support ribs 55 play a supporting role.
The check valve 57 is installed in the second through hole, the check valve 57 enables air in the secondary filtering device 5 to flow in a one-way mode, the valve seat of the check valve 57 is installed in the second through hole, the protruding ring 573 of the valve seat is in interference fit with the second through hole, the check valve 57 is firmly fixed in the second through hole, the limiting ring 560 is arranged in the second through hole, and the limiting ring 560 is in contact with the protruding ring 573 close to the blocking piece 571, so that the limiting effect is achieved.
The upper cover 51 comprises an outer ring structure 510, a middle ring structure 511 and an inner core structure 512 which are sequentially arranged from outside to inside, the outer ring structure 510 and the middle ring structure 511 are both annular, the inner core structure 512 is plate-shaped, preferably a circular plate, and a plurality of connecting rods 513 are fixedly connected between the outer ring structure 510 and the middle ring structure 511 and between the middle ring structure 511 and the inner core structure 512; the outer ring structure 510 is fixedly connected with the lower cover 58, when the outer ring structure 510 and the lower cover 58 are fastened, an annular convex part 52 is arranged on one side of the outer ring structure 510 close to the lower cover 58, the annular convex part 52 is arranged in the stepped groove of the lower cover 58 and is in abutting contact with the inner wall of the stepped groove, and the fastening of the outer ring structure 510 and the lower cover 58 is realized; a plurality of spacing bulges 53 arranged at intervals are arranged on one side of the middle ring structure 511 close to the secondary filtering element 54; the side of the inner core structure 512 close to the secondary filter element 54 is also provided with a limiting protrusion 53, and the limiting protrusion 53 plays a limiting role, so that the secondary filter element 54 is prevented from moving greatly.
The exhaust filtering device 6 comprises an exhaust hole arranged on the head cover body 1, a filtering membrane is arranged at the exhaust hole, and the filtering membrane also adopts the composite filtering membrane structure; the tightening and fixing device 4 is an elastic band, which is convenient for tightening the lower part of the head cover body 1.
When the air supply device 3 works, primarily filtered air enters the second through hole through the breathing tube 2 and then enters a gap between the outer ring structure 574 and the inner ring structure 578, the blocking piece 571 is pushed, the blocking piece 571 deforms outwards, so that the one-way valve 57 is opened, as shown in fig. 6, an arrow in fig. 6 indicates the air flow direction, the air passes through the secondary filtering filter element 54 for secondary filtering, and then flows into the hood from the first through hole 514 of the upper cover 51; when the air supply means 3 is damaged or is not powered, the check valve 57 is closed to prevent air mixed with impurities, bacteria, viruses, etc. from entering the head housing.
The protective head cover can carry out the omnidirectional protection to medical personnel's head, need not wear gauze mask and goggles, avoids pressing sore, indentation in medical personnel's face appearance, increases medical personnel's comfort. When the head cover is worn, the head cover body 1 covers the head of a medical worker, then the belt is tightened, and the air supply device is generally provided with a fixing belt and fixed on the body of the medical worker. When the respirator is used, the air supply device 3 is started, the air supply device 3 firstly carries out primary filtration on outside air, then the outside air enters the secondary filtering device 5 from the breathing pipe 2, the one-way valve 57 is opened due to the air pressure, the air carries out secondary filtration through the secondary filtering element 54, and then the air flows into the hood from the first through hole 514 of the upper cover 51. When the human body exhausts, the gas enters the external environment through the exhaust filter device 6 of the cover body, so that the cross infection phenomenon is avoided.
Claims (10)
1. The utility model provides a novel check valve, includes disk seat and case, and the case is installed on the disk seat, its characterized in that: the valve seat comprises an outer ring structure, an inner ring structure is arranged in the outer ring structure, and a plurality of connecting ribs arranged at intervals are fixedly connected between the outer ring structure and the inner ring structure; the valve core comprises a valve core column, one end of the valve core column is provided with an elastic separation blade, the valve core column is arranged in the inner ring structure and matched with the inner ring structure, and the inner side surface of the separation blade is attached to the end surface of the outer ring structure.
2. The novel check valve as claimed in claim 1, wherein: the spool comprises a first spool part, a second spool part and a third spool part which are arranged in sequence, the outer diameter of the second spool part is larger than that of the first spool part and that of the third spool part, and the second spool part is in interference fit with the inner ring structure.
3. The novel check valve as claimed in claim 2, wherein: the second valve core portion is longer than the inner ring structure, and the inner side surface of the baffle plate is in contact with the end surface of the inner ring structure.
4. A novel one-way valve as defined in claim 3, wherein: the difference between the length of the second valve core part and the length of the inner ring structure is recorded as L, and the difference between the length of the second valve core part and the length of the inner ring structure is recorded as L, wherein the L ranges from 0.3 mm to 0.5 mm.
5. The novel check valve as claimed in claim 4, wherein: the separation blade sets up vertically, and the shape of separation blade is circular.
6. The novel check valve as claimed in claim 2, wherein: a conical limiting block is arranged between the first valve core part and the second valve core part, and one end of the limiting block, which is close to the separation blade, is larger than one end of the limiting block, which deviates from the separation blade.
7. The novel check valve as claimed in claim 6, wherein: the first valve core part, the limiting block, the second valve core part, the third valve core part and the blocking piece are integrally formed and made of silica gel.
8. The novel check valve as claimed in claim 1, wherein: the periphery of the valve seat is provided with a plurality of raised rings arranged at intervals.
9. The novel check valve as claimed in claim 1, wherein: the length of the outer ring structure is greater than the length of the inner ring structure.
10. The novel check valve as claimed in claim 1, wherein: the outer diameter of the baffle plate is larger than the inner diameter of the outer ring structure and smaller than the outer diameter of the outer ring structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020167612.0U CN211599645U (en) | 2020-02-13 | 2020-02-13 | Novel one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020167612.0U CN211599645U (en) | 2020-02-13 | 2020-02-13 | Novel one-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211599645U true CN211599645U (en) | 2020-09-29 |
Family
ID=72579248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020167612.0U Active CN211599645U (en) | 2020-02-13 | 2020-02-13 | Novel one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211599645U (en) |
-
2020
- 2020-02-13 CN CN202020167612.0U patent/CN211599645U/en active Active
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