CN217463342U

CN217463342U - Medical one-way valve

Info

Publication number: CN217463342U
Application number: CN202221178775.4U
Authority: CN
Inventors: 吉文龙; 张叶华; 陈鹏宏
Original assignee: Ningbo Luke Medical Devices Co ltd
Current assignee: Ningbo Luke Medical Devices Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-09-20
Anticipated expiration: 2032-05-17

Abstract

A medical one-way valve comprises a valve body and a valve core positioned in the valve body, wherein the rear end of the valve body is provided with a rear through hole, the front end of the valve body is provided with a front through hole, a through channel is arranged between the rear through hole and the front through hole of the valve body so as to enable the valve body to be communicated front and back, a circle of convex shoulder is arranged in the valve body, the valve core comprises a valve rod and a valve head, the valve head is positioned in the through channel in front of the convex shoulder, the valve rod penetrates through the convex shoulder backwards, and a gap is formed between the valve rod and the convex shoulder; an elastic device is arranged between the valve head and the front end face of the valve body, a sealing ring is arranged between the rear end face of the valve head and the convex shoulder, and the sealing surface is sealed between the rear end face of the valve head and the convex shoulder under the elastic action force of the elastic device; the front end face of the valve body is turned inwards to form an inward turning cylinder, and the inward turning cylinder forms the front through opening.

Description

Medical one-way valve

Technical Field

The utility model relates to a medical check valve.

Background

Medical check valves are used in various medical devices for one-way flow of fluids. In the prior art, the general structure of a medical check valve is: including the valve body, be located the case of valve body, the rear end of valve body has the back opening, and the front end of valve body has preceding opening, thereby the valve body has the through-channel between back opening and preceding opening and makes the valve body link up from beginning to end. The axial movement of the valve core realizes the on-off of the through channel of the valve body, thereby realizing the function of one-way circulation. The existing medical one-way valve has the following defects: 1. the running stability of the valve core is to be improved after the valve core is assembled; 2. the flow rate of fluid out of the check valve is too low when the check valve is open.

Disclosure of Invention

In order to overcome the defects of the prior medical check valve, the utility model provides a medical check valve with better stability and higher flow rate of the fluid flowing out of the check valve.

The technical proposal of the utility model for solving the technical problem is that: a medical one-way valve comprises a valve body and a valve core positioned in the valve body, wherein the rear end of the valve body is provided with a rear through hole, the front end of the valve body is provided with a front through hole, a through channel is arranged between the rear through hole and the front through hole of the valve body so as to enable the valve body to be communicated front and back, a circle of convex shoulder is arranged in the valve body, the valve core comprises a valve rod and a valve head, the valve head is positioned in the through channel in front of the convex shoulder, the valve rod penetrates through the convex shoulder backwards, and a gap is formed between the valve rod and the convex shoulder;

an elastic device is arranged between the valve head and the front end face of the valve body, a sealing ring is arranged between the rear end face of the valve head and the convex shoulder, and the sealing ring is sealed between the rear end face of the valve head and the convex shoulder under the elastic action force of the elastic device;

the front end face of the valve body is turned inwards to form an inward turning cylinder, and the inward turning cylinder forms the front through opening.

Furthermore, the elastic device is a spring, the rear end of the spring is sleeved on the valve head, and the front end of the spring is sleeved outside the inner turnover cylinder.

Furthermore, the front end of the valve head is provided with a resisting ring, a sleeve head is arranged in front of the resisting ring, and the rear end of the spring is sleeved outside the sleeve head and is tightly propped against the resisting ring.

Furthermore, a circle of raised sealing convex ring is arranged on the front end face of the convex shoulder, and the sealing ring is tightly pressed between the sealing convex ring and the rear end face of the valve head.

Furthermore, the sealing ring is sleeved on the valve rod.

Furthermore, a circle of external convex shoulder is arranged on the outer side surface of the valve body.

The beneficial effects of the utility model reside in that: 1. the valve core is provided with a valve head and a valve rod, the valve rod penetrates through the convex shoulder, the valve head and the elastic device backwards to act, and the stability of the valve core is increased after the valve core is installed. 2. The front end face of the valve body is inwards turned to form an inwards turned cylinder, the inwards turned cylinder forms a front through hole, therefore, the inner diameter of the front through hole is smaller, fluid flows out of the front through hole with a smaller caliber when flowing out of the one-way valve, therefore, the flow speed is larger, and the great loss of the flow speed of the fluid caused by flowing through the one-way valve can be avoided.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view of fig. 1.

Fig. 3 is a schematic view of the valve cartridge.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, 2 and 3, a medical check valve comprises a valve body 1 and a valve core 2 positioned in the valve body 1, wherein the rear end of the valve body 1 is provided with a rear through hole 3, the front end of the valve body 1 is provided with a front through hole 4, the valve body is provided with a through channel between the rear through hole 3 and the front through hole so as to enable the valve body 1 to be through front and back, fluid flows into the check valve from the rear through hole 3 of the check valve and then flows out from the front through hole 4 of the check valve, a circle of shoulder 5 is arranged in the valve body 1, the valve core 2 comprises a valve rod 6 and a valve head 7, the valve head 7 is positioned in the through channel in front of the shoulder 5, and the valve rod 6 passes through the shoulder 5 backwards with a gap.

An elastic device 8 is arranged between the valve head 7 and the front end face of the valve body, a sealing ring 9 is arranged between the rear end face of the valve head 7 and the convex shoulder 5, and the sealing ring 9 is sleeved on the valve rod 6. Under the elastic force of the elastic device 8, the sealing ring 9 is sealed between the rear end face of the valve head 7 and the shoulder 5, and the structure enables the valve core 2 to be more stable after being installed. When fluid flows into the check valve from the rear port 3 of the check valve and then flows out from the front port 4 of the check valve, the valve core 2 is pushed open by the hydraulic pressure of the fluid against the elastic force of the elastic device 8 when the fluid passes through, so that the sealing between the valve head 7 and the shoulder 5 is released, and the fluid can pass through the check valve; if the fluid is going to enter the one-way valve from the front through opening 4 and leave the one-way valve, the direction of the hydraulic pressure force application is consistent with the direction of the elastic force application of the elastic device 8, and the valve head 7 and the shoulder 5 are always kept sealed.

Thereby the preceding terminal surface of valve body 1 turns over inwards and forms inside-turning barrel 10, inside-turning barrel 10 forms preceding opening 4, the internal diameter of preceding opening 4 is less, flows out from the less preceding opening 4 of bore when fluid flows out the check valve, therefore the velocity of flow is great, can not lead to the loss by a wide margin of the fluid velocity of flow because of flowing through the check valve.

Generally, the elastic means 8 is a spring, the rear end of which is sleeved on the valve head 7, and the front end of which is sleeved outside the inner cylinder 10. A better structure is as follows: the front end of the valve head 7 is provided with a retaining ring 11, a sleeve head 12 is arranged in front of the retaining ring 11, and the rear end of the spring is sleeved outside the sleeve head 12 and tightly abuts against the retaining ring 11.

In this embodiment, a circle of convex sealing convex ring 13 is arranged on the front end surface of the shoulder 5, the sealing ring 9 is tightly pressed between the sealing convex ring 13 and the rear end surface of the valve head 7, at this time, the contact surface between the sealing ring 9 and the sealing convex ring 13 is small, and once the sealing between the two is released, fluid can rapidly pass through.

In this embodiment, a circle of external shoulder 14 is arranged on the outer side surface of the valve body, and when the external pipe is connected to the valve body, the external pipe serves as a limiting component to limit the sleeving position of the external pipe.

Claims

1. The utility model provides a medical check valve, includes the valve body, is located the case in the valve body, the rear end of valve body have back opening, the front end of valve body has preceding opening, the valve body is in back opening and preceding opening between have the through channel thereby make the valve body link up its characterized in that around: a circle of convex shoulder is arranged in the valve body, the valve core comprises a valve rod and a valve head, the valve head is positioned in a through channel in front of the convex shoulder, the valve rod passes through the convex shoulder backwards, and a gap is formed between the valve rod and the convex shoulder;

2. The medical check valve as claimed in claim 1, wherein: the elastic device is a spring, the rear end of the spring is sleeved on the valve head, and the front end of the spring is sleeved outside the inner turnover cylinder.

3. The medical check valve as claimed in claim 2, wherein: the front end of the valve head is provided with a supporting ring, a sleeve head is arranged in front of the supporting ring, and the rear end of the spring is sleeved outside the sleeve head and tightly supported on the supporting ring.

4. A medical check valve as claimed in any of claims 1 to 3, wherein: the front end face of the convex shoulder is provided with a circle of raised sealing convex ring, and the sealing ring is tightly pressed between the sealing convex ring and the rear end face of the valve head.

5. The medical check valve as claimed in claim 4, wherein: the sealing ring is sleeved on the valve rod.

6. A medical check valve as claimed in any of claims 1 to 3, wherein: and a circle of external convex shoulder is arranged on the outer side surface of the valve body.