CN208927359U - A kind of Medical check valve - Google Patents
A kind of Medical check valve Download PDFInfo
- Publication number
- CN208927359U CN208927359U CN201820590950.8U CN201820590950U CN208927359U CN 208927359 U CN208927359 U CN 208927359U CN 201820590950 U CN201820590950 U CN 201820590950U CN 208927359 U CN208927359 U CN 208927359U
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- China
- Prior art keywords
- spool
- spring
- channel
- sealing element
- medical check
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Abstract
A kind of Medical check valve, including valve body, spool, spring and sealing element, the valve body have first passage, second channel and connecting hole, and first passage is connected to by the connecting hole with second channel, and the first limiting section is equipped in the first passage；The spool is set in valve body, and the spool upper end is equipped with the second limiting section, and the spring is set between first limiting section and the second limiting section, and the spring is in compressive state, to drive spool to move upwards；The lower end of the spool passes through connecting hole and extend into second channel, the sealing element is fixed on spool lower end, the connecting hole has the bellmouth reduced from second channel to first passage direction, the sealing element has the sealing surface of the curve form of protrusion, and the sealing surface forms sealing cooperation with the bellmouth under the action of the spring.While the application there can be good airtight performance, good operating characteristics is obtained.
Description
Technical field
This application involves medical instruments, and in particular to a kind of Medical check valve.
Background technique
Medical check valve is usually used in above the medical instruments such as anaesthetic mask, laryngeal mask.Existing Medical check valve uses spring
Traction plane sealing element is pressed on flat seal in unidirectional valve housing detent to realize that valve body is closed.To keep plane close
Sealing and shell are close closed to obtain good airtight performance, and spring, which needs to provide biggish tractive force, keeps flat seal tight
It is attached in the detent of shell.When syringe to the check valve of above structure injects medical fluid or when gas, due to spring draft force compared with
Greatly, syringe is difficult to band dynamic seal pushing, has defect inconvenient for use.
Summary of the invention
The application provides a kind of Medical check valve, can be obtained check valve when its inner spring provides lesser tractive force
Good airtight performance.
According in a first aspect, being provided in a kind of embodiment
There is first passage, second to lead to for a kind of Medical check valve, including valve body, spool, spring and sealing element, the valve body
First passage is connected to by road and connecting hole, the connecting hole with second channel, and the first limiting section is equipped in the first passage；Institute
Spool is stated in the valve body, and the spool upper end is equipped with the second limiting section, the spring is set to first limiting section and the
Between two limiting sections, and the spring is in compressive state, to drive spool to move upwards；The lower end of the spool, which passes through, to be connected
It connects hole and extend into second channel, the sealing element is fixed on spool lower end, and the connecting hole has from second channel to the
The bellmouth that one channel direction reduces, the sealing element have the sealing surface of the curve form of protrusion, and the sealing surface is in spring
Under the action of with the bellmouth formed sealing cooperation.
Preferably, the conical surface of the bellmouth is horizontal by 30-60 ° of angle.
Preferably, the conical surface of the bellmouth is horizontal by 35 ° of angles.
Preferably, the spring pocket is set on spool.
Preferably, the sealing surface is substantially in inverted bowl shaped structure.
Preferably, the sealing element is sheathed on spool lower end.
Preferably, the sealing element is made of rubber or silica gel.
Preferably, first limiting section be arranged in it is step-like between the inner wall of first passage and the hole wall of connecting hole
Structure.
Preferably, second limiting section is the T-shaped structure that spool upper end is arranged in.
According to the Medical check valve of above-described embodiment, since sealing element upper surface is the curve form protruded, sealing element
Upper surface is squeezed and deformed to form valve seal under the tractive force effect of spring with bellmouth, reaches good airtight performance.By
In the sealing surface of the curve form of protrusion there is deformability therefore can make sealing element when spring provides lesser tractive force
It is deformed, so as to reduce the tractive force of spring, after the tractive force of spring reduces, when an injection is needed, syringe is easy for
Band dynamic seal pushes, and without stiffly resisting syringe, offers convenience to using.
Detailed description of the invention
Fig. 1 is the application valve body structure schematic diagram；
Fig. 2 is the application closed check valve status architecture schematic diagram；
Fig. 3 is the unidirectional the valve opening state structural schematic diagram of the application.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail.Wherein different embodiments
Middle similar component uses associated similar element numbers.In the following embodiments, many datail descriptions be in order to
The application is better understood.However, those skilled in the art can recognize without lifting an eyebrow, part of feature
It is dispensed, or can be substituted by other elements, material, method in varied situations.In some cases, this Shen
Please it is relevant it is some operation there is no in the description show or describe, this is the core in order to avoid the application by mistake
More descriptions are flooded, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary, they
Relevant operation can be completely understood according to the general technology knowledge of description and this field in specification.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
Fig. 1-3 is please referred to, Medical check valve includes valve body 1, spool 2, spring 3 and sealing element 4, and valve body 1 has first
Channel 11, second channel 12 and connecting hole 13, first passage 11 is connected to by connecting hole 13 with second channel 12, in first passage 11
Equipped with the first limiting section 14, the first limiting section 14 is the platform being arranged between the inner wall of first passage 11 and the hole wall of connecting hole 13
Stepped structure.
Spool 2 is set in valve body 1, and 2 upper end of spool is equipped with the second T-shaped limiting section 21；Spring 3 is set on spool 2,
And it is set between the first limiting section 14 and the second limiting section 21 during spring 3 is extruded in by the first limiting section 14 and the second limiting section 21
Between, it is in compressive state, to drive spool to move upwards；Sealing element 4 is sheathed on the lower end of spool 2, and sealing element 4 has protrusion
The sealing surface of curve form, connecting hole 13 have the bellmouth reduced from second channel 12 to 11 direction of first passage, sealing surface
Sealing cooperation is formed with the bellmouth under the action of the spring.Flexible rubber or silica gel material can be used in sealing element 4
It is made, to make the sealing surface of sealing element with the performance of contraction distortion.
Working principle explanation: when not having syringe to squeeze into liquid medicine injection or gas, spool is not by external force, due to bullet
Spring 3 is extruded in centre by the first limiting section 14 and the second limiting section 21, and is in compressive state, therefore spring 3 can be to the limit of spool 2
Position portion 21 generates upward active force, and limiting section 21 can be such that spool 2 moves upwards by upward active force, and sealing element 4 is fixed
On spool 2, therefore sealing element also moves upwards, but due to having connecting hole 13 above second channel 12, connecting hole 13 has
The bellmouth reduced from second channel to first passage direction, so that sealing element 4 can be limited in after rising to certain position
In bellmouth 12, and since the sealing surface of the curve form of the protrusion of sealing element 4 is deformed under spring action thus and bellmouth
Form good sealing cooperation.When syringe squeezes into liquid medicine injection or gas, syringe is by manpower operation under movable valve plug 2
It pushes away, spool 2 is moved down with dynamic seal 4, and sealing element 4 is made to leave bellmouth, and channel is opened between sealing element 4 and bellmouth.Injection
When device squeezes into liquid medicine injection or gas, syringe can be constituted with 11 inner wall of first passage of valve body 2 and be sealed, as shown in figure 3, wait infuse
The medical fluid or gas penetrated from the top of spool 2 enter, subsequently into the channel in spool, then from be located at sealing element upper section
Spool on through-hole come out (positioned at sealing element upper section spool be equipped with from spool face be connected to valve core inside channel
Through-hole), the channel then opened between sealed part 4 and bellmouth enters second channel 12, finally by check valve.
The conical surface of bellmouth is horizontal by 30-60 ° of angle.Preferably, the conical surface of bellmouth is horizontal by 35 ° of angles
Degree.This angle setting primary concern bellmouth matches to form excellent sealing with the sealing surface of sealing element, and is unlikely to sealing element
From being skidded off in the cavity entered above in bellmouth, the minimum for needing to be greater than bellmouth straight of sealing element straight, makes sealing element
Bellmouth can be limited in.
As the preferred embodiment of the application, sealing surface is substantially in inverted bowl shaped structure, inverted bowl shaped structure
Sealing element can form good sealing with the bellmouth on connecting hole.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (9)
1. a kind of Medical check valve, characterized by comprising: valve body, spool, spring and sealing element, the valve body have first to lead to
First passage is connected to by road, second channel and connecting hole, the connecting hole with second channel, and first is equipped in the first passage
Limiting section；The spool is set in valve body, and the spool upper end is equipped with the second limiting section, and the spring is set to first limit
Between position portion and the second limiting section, and the spring is in compressive state, to drive spool to move upwards；Under the spool
End is across connecting hole and extend into second channel, and the sealing element is fixed on spool lower end, and the connecting hole has from second
The bellmouth that channel is reduced to first passage direction, the sealing element have the sealing surface of the curve form of protrusion, the sealing
Face forms sealing cooperation with the bellmouth under the action of the spring.
2. Medical check valve as described in claim 1, which is characterized in that the conical surface of the bellmouth is horizontal by 30-60 °
Angle.
3. Medical check valve as claimed in claim 2, which is characterized in that the conical surface of the bellmouth is horizontal by 35 ° of angles
Degree.
4. Medical check valve as described in claim 1, which is characterized in that the spring pocket is set on spool.
5. Medical check valve as described in claim 1, which is characterized in that the sealing surface is substantially in inverted bowl shaped structure.
6. Medical check valve as described in claim 1, which is characterized in that the sealing element is sheathed on spool lower end.
7. Medical check valve as described in claim 1, which is characterized in that the sealing element is made of rubber or silica gel.
8. such as the described in any item Medical check valves of claim 1-7, which is characterized in that first limiting section is setting the
Step-like structure between the inner wall in one channel and the hole wall of connecting hole.
9. such as the described in any item Medical check valves of claim 1-7, which is characterized in that second limiting section is to be arranged in valve
The T-shaped structure of core upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820590950.8U CN208927359U (en) | 2018-04-24 | 2018-04-24 | A kind of Medical check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820590950.8U CN208927359U (en) | 2018-04-24 | 2018-04-24 | A kind of Medical check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208927359U true CN208927359U (en) | 2019-06-04 |
Family
ID=66714153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820590950.8U Active CN208927359U (en) | 2018-04-24 | 2018-04-24 | A kind of Medical check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208927359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113882451A (en) * | 2021-10-11 | 2022-01-04 | 江苏玖泰电力实业有限公司 | Dredger with flexible arm desilting |
-
2018
- 2018-04-24 CN CN201820590950.8U patent/CN208927359U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113882451A (en) * | 2021-10-11 | 2022-01-04 | 江苏玖泰电力实业有限公司 | Dredger with flexible arm desilting |
| CN113882451B (en) * | 2021-10-11 | 2022-07-12 | 江苏玖泰电力实业有限公司 | Dredger with flexible arm desilting |
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| GR01 | Patent grant |