CN207640806U - A kind of Medical check valve - Google Patents
A kind of Medical check valve Download PDFInfo
- Publication number
- CN207640806U CN207640806U CN201720549685.4U CN201720549685U CN207640806U CN 207640806 U CN207640806 U CN 207640806U CN 201720549685 U CN201720549685 U CN 201720549685U CN 207640806 U CN207640806 U CN 207640806U
- Authority
- CN
- China
- Prior art keywords
- spool
- middle seal
- check valve
- seal
- sealing
- 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.)
- Expired - Fee Related
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model is related to a kind of better Medical check valve of sealing effect.It includes valve body, outer cover, spring, spool, and the middle seal of the spool is made of flexible material, and the " T " shape structure in section of the middle seal of spool, and the inserting surface of the middle seal of the spool is inverted conical shape face；The inner wall of the middle part connection chamber is in the inverted conical shape face coordinated with the inserting surface inverted conical shape face of the middle seal of spool, and the top of the middle part connection chamber is in pointed shape protrusion；Under sealing state, the inserting surface of the middle seal of spool is inserted into the inner wall formation taper surface sealing of the middle part connection chamber, and the pointed shape protrusion supports the angle formation wedge angle sealing for the " T " shape structure for setting the middle seal for being sealed in spool.With the above structure, the utility model has the advantages that double sealing structure, sealing effect are good, service life is high and assembling structure is simple.
Description
Technical field
The utility model medical instrument valve body technical field, more particularly, to a kind of better Medical check valve of sealing effect.
Background technology
Medically applying very extensive for medical check valve, such as the injection being set in before syringe is unidirectional
Valve, existing this kind of check valve is as shown in Figure 1, the sealing position of spool a carries out plane by the sealing ring b of plane and presses densification
Envelope, the sealing surface of this sealing means is small, and sealing ring b is deformed after long-term use is affected to sealing effect, and medical treatment note
The medical instruments such as emitter are very high for the sealing performance requirement of check valve, in view of this, it is necessary to design a kind of sealing performance
Better check valve is come more than solving the problems, such as.
Invention content
The purpose of the utility model is more preferable aiming at a kind of sealing effect for providing in place of the deficiencies in the prior art, uses the longevity
Order long Medical check valve.
In order to achieve the above objectives, the technical solution of the utility model is：A kind of Medical check valve includes valve body, outer cover, bullet
Spring, spool, valve body are in hollow structure, and be divided into upper plenum in valve body is connected to chamber with lower cavity and middle part, and outer cover is hollow structure,
The lower part of outer cover, which plugs, to be sealed in the upper opening of valve body, and spool is in upper lever portion and lower rod piece portion and middle seal, bullet
Spring is sleeved in the upper lever portion of spool and the both ends of spring are supported be located between valve deck and middle seal respectively, in the spool
Between sealing be made of flexible material, and the " T " shape structure in section of the middle seal of spool, the middle seal of the spool
Inserting surface be inverted conical shape face；The inner wall of the middle part connection chamber is in the vertebra coordinated with the inserting surface of the middle seal of spool
The top in shape face, the middle part connection chamber is in pointed shape protrusion；Under sealing state, the inserting surface of the middle seal of spool is inserted into
The inner wall that chamber is connected to the middle part forms taper surface sealing, and the pointed shape protrusion supports and sets the intermediate seal for being sealed in spool
The angle of the " T " shape structure in portion forms wedge angle sealing.
The spool is the component of integral type, and the upper lever portion and lower rod piece portion of spool are made of hard material, spool
Middle seal is molded by silica gel.
The spool is that two components coordinate, and the wherein upper lever portion of spool and lower rod piece portion is linked together by rigid material
Material is made, and the middle seal of spool is molded in sleeve-like structure by silica gel.
The hard material is plastics or metal.
The lower rod piece portion of the spool is socketed with interior plug.
With the above structure, the utility model increases sealing contact surface by the cooperation in inverted conical shape face, improves spool
Sealing performance, the angle that the " T " shape structure for setting the middle seal for being sealed in spool is supported further through pointed shape protrusion form point
Angle seals, and spool is made to have double sealing structure, makes sealing effect sealing effect more single than tradition good very much；From the foregoing, it will be observed that this
It is novel to have the advantages that double sealing structure, sealing effect are good, service life is high and assembling structure is simple.
Description of the drawings
Fig. 1 is the cross-sectional view of existing check valve；
Fig. 2 is the cross-sectional view under the sealing state of the utility model embodiment；
Fig. 3 is the cross-sectional view under the opening state of the utility model embodiment；
Fig. 4 is that the utility model embodiment is connected with syringe using diagrammatic cross-section；
Fig. 5 is the utility model integral type spool example part cross-sectional view；
Fig. 6 is the utility model Split type valve core example part cross-sectional view.
Specific implementation mode
As shown in figures 1 to 6, a kind of Medical check valve, includes valve body 10, outer cover 20, spring 30, spool 40, and valve body 10 is in
Hollow structure is divided into upper plenum 11 in valve body 10 and is connected to chamber 13 with lower cavity 12 and middle part, and outer cover 20 is hollow structure, outer cover
20 lower part, which plugs, to be sealed in the upper opening of valve body 10, and spool 40 is in upper lever portion 41 and lower rod piece portion 42 and intermediate seal
Portion 43, spring 30 is sleeved in the upper lever portion 41 of spool 40 and the both ends of spring 30 are supported be located at valve deck 20 and middle seal respectively
Between 43, the middle seal 43 of the spool 40 is made of flexible material, and the section of the middle seal 43 of spool 40 is in
The inserting surface 431 of " T " shape structure, the middle seal 43 of the spool 40 is inverted conical shape face；The inner wall of the middle part connection chamber 13
In the inverted conical shape face that the inserting surface 431 of the middle seal 43 with spool 40 coordinates, the top of the middle part connection chamber 13 is in point
Angular protrusion 131；Under sealing state, the inserting surface 431 of the middle seal 43 of spool 40 is inserted into the middle part connection chamber 13
Inner wall formed taper surface sealing, and the pointed shape protrusion 131 support set the "T"-shaped of the middle seal 43 for being sealed in spool 40
The angle of structure forms wedge angle sealing.
The spool 40 is the component of integral type, and the upper lever portion 41 and lower rod piece portion 42 of spool 40 are by hard material system
At metal or hard plastic may be used and make, the middle seal 43 of spool 40 is molded by silica gel.
Coordinate alternatively, the spool 40 is two components, wherein the upper lever portion 41 of spool 40 and lower rod piece portion 42 connect
It is integrated and is made of hard material, metal may be used or hard plastic makes, the middle seal 43 of spool 40 is in sleeve-like structure
It is molded by silica gel.
The lower rod piece portion 42 of the spool 40 is socketed with interior plug 50.
In use, Application Example as shown in Figure 4, the positive duct in bottom end of check valve 100 is set by 6% luer taper
Meter, check valve 100 can be fitted close with syringe 200 when work, the inner wall and 200 outer wall tight fit of syringe of check valve 100
Sealing is formed, the flow-guiding mouth circulated gases or liquid can be passed through between bottom end and the edge.
Again as Figure 2-3, when with pressure gas or liquid flowed into from the lower cavity 12 of valve body, in pressure acts on
On plug 50, interior plug 50 has band movable valve plug 40 to move upwards trend, and when the pressure is more than the elastic force of spring 30, spool 40 overcomes bullet
The inner wall that the elastic force of spring 30 makes the middle seal 43 of spool 40 be connected to chamber 13 with middle part detaches, check valve conducting；Conversely, spool
The inner wall that the inserting surface 431 of 40 middle seal 43 is inserted into the middle part connection chamber 13 forms taper surface sealing, and described
The angle that pointed shape protrusion 131 supports the " T " shape structure for setting the middle seal 43 for being sealed in spool 40 forms wedge angle sealing, this
Sample makes spool have double sealing structure, makes sealing effect sealing effect more single than tradition good very much.
Certainly, the utility model can also have other numerous embodiments, without departing substantially from the spirit of the present invention and essence
In the case of, those skilled in the art work as can make various corresponding change and deformations, but these phases according to utility model
The change and distortion answered should all belong to the protection domain of utility model the attached claims.
Claims (5)
1. a kind of Medical check valve includes valve body, outer cover, spring, spool, valve body is in hollow structure, is divided into overhead in valve body
Chamber is connected to chamber with lower cavity and middle part, and outer cover is hollow structure, and the lower part of outer cover, which plugs, to be sealed in the upper opening of valve body, valve
Core is in upper lever portion and lower rod piece portion and middle seal, and spring pocket is in the upper lever portion of spool and the both ends of spring are distinguished
To being located between valve deck and middle seal, it is characterised in that：The middle seal of the spool is made of flexible material, and valve
The inserting surface of the " T " shape structure in section of the middle seal of core, the middle seal of the spool is inverted conical shape face；The middle part
The inner wall for being connected to chamber is in the inverted conical shape face coordinated with the inserting surface of the middle seal of spool, and the top of the middle part connection chamber is in
Pointed shape protrusion；Under sealing state, the inner wall that the inserting surface of the middle seal of spool is inserted into the middle part connection chamber is formed
Taper surface seals, and angle of the pointed shape protrusion to the " T " shape structure for setting the middle seal for being sealed in spool is formed
Wedge angle seals.
2. a kind of Medical check valve according to claim 1, it is characterised in that：The spool is the component of integral type, valve
The upper lever portion and lower rod piece portion of core are made of hard material, and the middle seal of spool is molded by silica gel.
3. a kind of Medical check valve according to claim 1, it is characterised in that：The spool is that two components coordinate,
The wherein upper lever portion of spool and lower rod piece portion is linked together and is made of hard material, and the middle seal of spool is in sleeve-like structure
It is molded by silica gel.
4. a kind of Medical check valve according to claim 2 or 3, it is characterised in that：The hard material is plastics or gold
Belong to.
5. a kind of Medical check valve according to claim 4, it is characterised in that：In the lower rod piece portion of the spool is socketed with
Plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720549685.4U CN207640806U (en) | 2017-05-18 | 2017-05-18 | A kind of Medical check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720549685.4U CN207640806U (en) | 2017-05-18 | 2017-05-18 | A kind of Medical check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207640806U true CN207640806U (en) | 2018-07-24 |
Family
ID=62886091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720549685.4U Expired - Fee Related CN207640806U (en) | 2017-05-18 | 2017-05-18 | A kind of Medical check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207640806U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111991642A (en) * | 2019-08-23 | 2020-11-27 | 安径医疗 | Backflow prevention device |
-
2017
- 2017-05-18 CN CN201720549685.4U patent/CN207640806U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111991642A (en) * | 2019-08-23 | 2020-11-27 | 安径医疗 | Backflow prevention device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180724 |