CN211461775U - Anti-backflow valve - Google Patents
Anti-backflow valve Download PDFInfo
- Publication number
- CN211461775U CN211461775U CN201921993462.2U CN201921993462U CN211461775U CN 211461775 U CN211461775 U CN 211461775U CN 201921993462 U CN201921993462 U CN 201921993462U CN 211461775 U CN211461775 U CN 211461775U
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- valve
- hole
- infusion
- valve plate
- flexible
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to the field of medical equipment, and discloses an anti-backflow valve, which comprises a first valve cover provided with a first infusion through hole and a second valve cover provided with a second infusion through hole, wherein the first valve cover and the second valve cover are mutually butted and form a valve block control cavity in the butted part, a flexible valve block is arranged in the valve block control cavity, and a valve block supporting piece is arranged in the valve block control cavity on the second valve cover; when fluid flows from the first fluid infusion through hole to the second fluid infusion through hole, the middle part of the flexible valve plate is abutted against the valve plate supporting piece, the edge of the flexible valve plate deforms, and the first fluid infusion through hole is opened; when the fluid flows to the first infusion through hole from the second infusion through hole, the flexible valve plate integrally covers the first infusion through hole. The utility model discloses the assembly is simple, and assembly tolerance requires lowly, can prevent liquid reflux effectively, improves the price/performance ratio of product.
Description
All as the field of technology
The utility model relates to the field of medical equipment, especially, relate to an anti-reflux valve.
All the above-mentioned background techniques
In the prior art, in medical equipment for infusion, an anti-reflux valve is a commonly used essential component, and the existing anti-reflux valve is complex in structure and high in assembly precision requirement, but the anti-reflux effect is easily reduced due to assembly tolerance.
All kinds of practical novel contents
The utility model aims at providing an anti-reflux valve, the assembly is simple, and assembly tolerance requires lowly, can prevent liquid reflux effectively, improves the price/performance ratio of product.
In order to realize the purpose of the utility model, the technical scheme of the utility model is that: an anti-backflow valve comprises a first valve cover provided with a first infusion through hole and a second valve cover provided with a second infusion through hole, wherein the first valve cover and the second valve cover are mutually butted and form a valve plate control cavity in the butted part, a flexible valve plate is arranged in the valve plate control cavity, and a valve plate support piece is arranged in the valve plate control cavity on the second valve cover; when fluid flows from the first fluid infusion through hole to the second fluid infusion through hole, the middle part of the flexible valve plate is abutted against the valve plate supporting piece, the edge of the flexible valve plate deforms, and the first fluid infusion through hole is opened; when the fluid flows to the first infusion through hole from the second infusion through hole, the flexible valve plate integrally covers the first infusion through hole.
Preferably, the valve plate supporting piece is a plate rib and is provided with a connecting part and a butting part, the connecting part is integrally formed or fixedly connected with the inner wall of the second valve cover, and the butting part is used for locally butting against the flexible valve plate.
Preferably, when the flexible valve plate covers the first infusion through hole, the abutting part of the valve plate supporting piece is just contacted with the flexible valve plate or has a slight gap between the abutting parts.
Preferably, the thickness of the valve plate supporting piece is less than or equal to one fourth of the diameter of the first liquid conveying through hole.
Preferably, the cross section of the valve plate control cavity is circular or polygonal.
Preferably, the shape of the flexible valve plate is a circular plate, and the ratio of the diameter of the flexible valve plate to the diameter of the first liquid conveying through hole is larger than or equal to 1.5.
Preferably, the shape of the flexible valve plate is a polygonal plate, and the ratio of the diameter of an inscribed circle of the polygon to the diameter of the first liquid conveying through hole is more than or equal to 1.5.
Preferably, the flexible valve plate is made of silica gel, isoprene rubber or TPE (thermoplastic elastomer) elastomer materials.
The utility model has the advantages that:
compared with the prior art, the utility model discloses the assembly is simple, and assembly tolerance requires lowly, can prevent liquid reflux effectively, improves the price/performance ratio of product.
Description of the drawings
Fig. 1 is an exploded view of a preferred embodiment of the present invention;
fig. 2 is a front view of a preferred embodiment of the present invention;
FIG. 3 is a schematic view of a section A-A of FIG. 2 showing a backflow prevention state in which the flexible valve sheet closes the first fluid feed through hole when fluid flows from the second fluid feed through hole to the first fluid feed through hole;
FIG. 4 is a schematic view of the state in FIG. 3, in which the flexible valve plate bends toward the valve plate support when the liquid flows from the first liquid inlet hole to the second liquid inlet hole, so as to open the first liquid inlet hole and achieve a forward flow;
FIG. 5 is an enlarged top view of FIG. 3;
wherein the reference numerals are:
10. a first valve cover; 101. a first infusion through hole; 20. a second valve cover; 201. a second infusion through hole; 202. a valve plate support; 2021. a connecting portion; 2022. a butting part; 30. a flexible valve plate.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
(specific embodiments) in all cases
As shown in fig. 1 to 5, an anti-backflow valve includes a first valve cover 10 having a first fluid infusion hole 101 and a second valve cover 20 having a second fluid infusion hole 201, where the first valve cover 10 and the second valve cover 20 are butted against each other and form a valve sheet control cavity in the butted portion, a flexible valve sheet 30 is disposed in the valve sheet control cavity, and a valve sheet support 202 is disposed in the valve sheet control cavity on the second valve cover 20; when fluid flows from the first fluid infusion through hole 101 to the second fluid infusion through hole 201, the middle part of the flexible valve plate 30 is abutted against the valve plate support 202 and the edge of the flexible valve plate 30 to be bent and deformed, and the first fluid infusion through hole 101 is opened, so that forward fluid infusion is realized; when fluid flows to the first infusion through hole 101 from the second infusion through hole 201, the flexible valve plate integrally covers the first infusion through hole 101, so that the anti-backflow state is realized. The utility model discloses the assembly is simple, and assembly tolerance requires lowly, can prevent liquid reflux effectively, improves the price/performance ratio of product.
In a preferred embodiment, the valve plate supporting member 202 is a rib and has a connecting portion 2021 and an abutting portion 2022, the connecting portion 2021 is integrally formed or fixedly connected to the inner wall of the second valve cover 20, and the abutting portion 2022 is used for the local abutting of the flexible valve plate 30, in a preferred embodiment, the abutting portion is located in a diameter direction of the first fluid infusion through hole 101, so that the abutting effect on the flexible valve plate 30 is relatively stable.
In a preferred embodiment, when the flexible valve sheet 30 covers the first infusion through hole 101 as a whole, the abutting portion 2022 of the valve sheet support 202 just contacts with the flexible valve sheet 30 or has a slight gap H therebetween, so as to prevent the flexible valve sheet 30 from being deformed in advance, ensure that the flexible valve sheet 30 covers the port portion or the step portion of the first infusion through hole 101 smoothly, and prevent the second infusion through hole 201 from flowing back to the first infusion through hole 101.
In a preferred embodiment, the thickness t of the valve plate support 202 is less than or equal to a quarter of the diameter d of the first infusion hole 101, the thickness of the valve plate support 202 can control the curvature of the flexible valve plate 30, so as to control the opening size of the first infusion hole 101 during forward flow and adjust the flow rate of the liquid, and when the thickness of the valve plate support 202 is less than or equal to a quarter of the diameter d of the first infusion hole 101, the opening size of the forward flow is suitable for the speed of infusion.
In a preferred embodiment, the cross section of the valve plate control cavity is circular or polygonal, and the shape of the valve plate control cavity can be set according to actual needs.
In a preferred embodiment, the flexible valve sheet 30 is in the shape of a circular disc, and the ratio of the diameter D of the flexible valve sheet to the diameter D of the first liquid feeding through hole 101 is greater than or equal to 1.5, so that the flexible valve sheet 30 can completely block the first liquid feeding through hole 101 when liquid flows back.
In a preferred embodiment, the shape of the flexible valve sheet 30 is a polygonal sheet, and the ratio of the diameter D of the inscribed circle of the polygon to the diameter D of the first infusion through hole 101 is greater than or equal to 1.5, so that the flexible valve sheet 30 can completely block the first infusion through hole 101 when liquid flows back, where the diameter D of the inscribed circle is the effective coverage area of the flexible valve sheet 30 on the first infusion through hole 101.
In a preferred embodiment, the flexible valve plate 30 is made of a silica gel, an isoprene rubber or a TPE elastomer material, and the flexible valve plate 30 made of the above materials has a suitable bending property, so that the transfusion requirement of the anti-reflux valve is ensured.
The above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and all equivalent changes made by the shape, structure and principle of the present invention should be covered by the protection scope of the present invention.
Claims (8)
1. An anti-backflow valve is characterized by comprising a first valve cover with a first infusion through hole and a second valve cover with a second infusion through hole, wherein the first valve cover and the second valve cover are mutually butted and form a valve plate control cavity in the butted part, a flexible valve plate is arranged in the valve plate control cavity, and a valve plate support piece is arranged in the valve plate control cavity on the second valve cover; when the fluid flows from the first fluid infusion through hole to the second fluid infusion through hole, the middle part of the flexible valve plate is abutted against the valve plate supporting piece, the edge of the flexible valve plate deforms, and the first fluid infusion through hole is opened; when the fluid flows to the first infusion through hole from the second infusion through hole, the flexible valve plate integrally covers the first infusion through hole.
2. The anti-backflow valve according to claim 1, wherein the valve sheet supporting member is a plate rib and has a connecting portion and a butting portion, the connecting portion is integrally formed or fixedly connected to the inner wall of the second valve cover, and the butting portion is used for locally butting against the flexible valve sheet.
3. The anti-backflow valve according to claim 2, wherein when the flexible valve sheet covers the first liquid-feeding through hole as a whole, the abutting portions of the sheet support member just contact with the flexible valve sheet or have a slight gap therebetween.
4. The anti-reflux valve as claimed in claim 2 or 3, wherein the thickness of the sheet support is less than or equal to one quarter of the diameter of the first feeding through hole.
5. The anti-reflux valve as claimed in claim 2 or 3, wherein the cross section of the valve plate control chamber is circular or polygonal.
6. The anti-reflux valve as claimed in any one of claims 1 to 3, wherein the flexible valve plate is in the shape of a circular plate, and the ratio of the diameter of the flexible valve plate to the diameter of the first liquid-feeding through hole is greater than or equal to 1.5.
7. The anti-backflow valve according to any one of claims 1 to 3, wherein the flexible valve plate is in the shape of a polygonal plate, and the ratio of the diameter of an inscribed circle of the polygon to the diameter of the first liquid-delivery through hole is greater than or equal to 1.5.
8. The anti-reflux valve as claimed in any one of claims 1 to 3, wherein the flexible valve sheet is made of silicone, isoprene or TPE elastomer material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921993462.2U CN211461775U (en) | 2019-11-15 | 2019-11-15 | Anti-backflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921993462.2U CN211461775U (en) | 2019-11-15 | 2019-11-15 | Anti-backflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211461775U true CN211461775U (en) | 2020-09-11 |
Family
ID=72367421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921993462.2U Active CN211461775U (en) | 2019-11-15 | 2019-11-15 | Anti-backflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211461775U (en) |
-
2019
- 2019-11-15 CN CN201921993462.2U patent/CN211461775U/en active Active
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