CN111150894A

CN111150894A - Negative suction device capable of preventing backflow

Info

Publication number: CN111150894A
Application number: CN202010128425.6A
Authority: CN
Inventors: 张福洋; 盛艳丽; 傅倩如; 薛宁
Original assignee: Jiangsu Normal University
Current assignee: Jiangsu Normal University
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-05-15

Abstract

The utility model provides a can prevent device is inhaled to negative that refluences, includes the negative pressure vertical tube, both sides are connected with last trachea and lower intake pipe respectively about the negative pressure vertical tube right-hand member, last trachea and lower intake pipe right-hand member all are connected with the outlet duct, all install anti-refluence device on last trachea and the lower intake pipe, simple structure, the structure is clear understandable, and the closing plate in the anti-refluence device in the intake pipe plays sealed effect that blocks, can effectively avoid solution or gaseous palirrhea to the intake pipe in, consequently, reciprocating of piston all has the negative pressure and takes out material and feeding effect, and is efficient, can effectively avoid palirrhea, easy operation, is worth promoting.

Description

Negative suction device capable of preventing backflow

Technical Field

The invention relates to the technical field of medical equipment, in particular to a negative suction device capable of preventing backflow.

Background

In the prior art, irrigation and drainage are one of the most basic operations in surgical operation. It is known that the drainage is performed most frequently and mainly by negative pressure drainage, and the flushing is performed by providing a certain positive pressure. It is known in the prior art that drainage under a negative pressure environment is easy to cause reflux, which has a great safety hazard in medicine, and therefore, a negative suction device capable of preventing reflux is needed.

Disclosure of Invention

The invention aims to provide a negative suction device capable of preventing backflow so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the negative suction device comprises a negative pressure vertical cylinder, wherein an upper air inlet pipe and a lower air inlet pipe are connected to the upper side and the lower side of the right end face of the negative pressure vertical cylinder respectively, the right ends of the upper air inlet pipe and the lower air inlet pipe are connected with air outlet pipes respectively, and anti-backflow devices are installed on the upper air inlet pipe and the lower air inlet pipe respectively.

Preferably, the middle of being provided with the piston in the vertical section of thick bamboo of negative pressure, fixedly connected with piston rod in the middle of the piston up end, piston rod upper end stretches out that the vertical section of thick bamboo of negative pressure sets up and fixedly connected with handle outward, both sides are provided with negative pressure chamber and lower negative pressure chamber respectively about the piston, go up the intake pipe and communicate with last negative pressure chamber and lower negative pressure chamber respectively with lower intake pipe, both sides are connected with last air inlet and lower air inlet respectively about the vertical section of thick bamboo left end face of negative pressure.

Preferably, the right end of the air outlet pipe is connected with a buffer box, and an exhaust pipe is connected above the right end face of the buffer box.

Preferably, the anti-backflow device comprises a fixed frame, an air cavity is arranged in the fixed frame, the upper air inlet pipe extends into the air cavity and is connected with a sealing plate, a connector is integrally arranged on the upper end face of the sealing plate, and a plurality of connecting holes are formed in the outer surface of the connector.

Preferably, an extension spring is fixedly connected between the sealing plate and the side wall of the top in the air cavity.

Preferably, a sealing ring is arranged at the joint of the sealing plate and the upper air inlet pipe.

Compared with the prior art, the invention has the beneficial effects that: the invention has simple structure and clear and understandable structure, the sealing plate in the anti-backflow device in the air inlet pipe plays a role of sealing and blocking, and can effectively prevent solution or gas from backflowing to the air inlet pipe, therefore, the up-and-down movement of the piston has the functions of negative pressure material pumping and feeding, the efficiency is high, the backflowing can be effectively avoided, the operation is simple, and the popularization is worth.

Drawings

FIG. 1 is a schematic view of an overall structure of a negative suction device capable of preventing reverse flow;

FIG. 2 is a schematic view of an anti-reverse flow device of a negative suction device capable of preventing reverse flow.

In the figure: 1-lower air inlet pipe, 2-lower negative pressure cavity, 3-negative pressure vertical cylinder, 4-piston, 5-lower air inlet, 6-upper air inlet, 7-upper negative pressure cavity, 8-piston rod, 9-handle, 10-upper air inlet pipe, 11-anti-backflow device, 12-air outlet pipe, 13-buffer box, 14-air outlet pipe, 15-air cavity, 16-sealing plate, 17-extension spring, 18-connector, 19-connecting hole and 20-fixing frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a negative suction device capable of preventing backflow comprises a negative pressure vertical cylinder 3, wherein an upper air inlet pipe 10 and a lower air inlet pipe 1 are respectively connected to the upper side and the lower side of the right end face of the negative pressure vertical cylinder 3, air outlet pipes 12 are respectively connected to the right ends of the upper air inlet pipe 10 and the lower air inlet pipe 1, anti-backflow devices 11 are respectively installed on the upper air inlet pipe 10 and the lower air inlet pipe 1, a piston 4 is arranged in the middle of the negative pressure vertical cylinder 3, a piston rod 8 is fixedly connected to the middle of the upper end face of the piston 4, the upper end of the piston rod 8 extends out of the negative pressure vertical cylinder 3 and is fixedly connected with a handle 9, an upper negative pressure cavity 7 and a lower negative pressure cavity 2 are respectively arranged on the upper side and the lower side of the piston 4, the upper air inlet pipe 10 and the lower air inlet pipe 1 are respectively communicated with the upper negative pressure cavity 7 and the lower negative pressure cavity 2, an, the utility model discloses a reverse flow device, including buffer tank 13, anti-backflow device 11, sealing plate 16, connector 18, sealing plate 16 and air chamber 15, buffer tank 13 right-hand member face top is connected with blast pipe 14, anti-backflow device 11 includes fixed frame 20, be provided with air cavity 15 in the fixed frame 20, go up air pipe 10 and stretch into and set up and be connected with sealing plate 16 in the air cavity 15, the integration of sealing plate 16 up end is provided with connector 18, connector 18 surface is provided with a plurality of connecting holes 19, fixedly connected with extension spring 17 between the top.

The handle 9 is held by hand to push the piston rod 8 to move up and down, thereby pushing the piston 4 to move up and down in the vertical cylinder 3, when the piston 4 moves up, the lower negative pressure cavity 2 is in the negative pressure state at this moment, solution or gas enters the lower negative pressure cavity 2 from the lower air inlet 5, then when the piston 4 moves down, solution or gas enters the upper negative pressure cavity 7 from the upper air inlet 6, and gas in the lower negative pressure cavity 2 enters the lower air inlet pipe 1, push open the sealing plate 16 in the fixed frame 20, so that the lower air inlet pipe 1 is communicated with the air cavity 15 through the connecting hole 19, then enter 13 through the air outlet pipe 12, finally discharge from the air outlet pipe 14, and at this moment, the sealing plate 16 in the anti-backflow device 11 in the upper air inlet pipe 10 plays a sealing and blocking role, and the backflow of solution or gas in the lower air inlet pipe.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a can prevent negative suction device of refluence, includes negative pressure vertical section of thick bamboo (3), its characterized in that: the negative pressure vertical cylinder (3) is characterized in that an upper air inlet pipe (10) and a lower air inlet pipe (1) are connected to the upper side and the lower side of the right end face of the negative pressure vertical cylinder respectively, the upper air inlet pipe (10) and the lower air inlet pipe (1) are connected with an air outlet pipe (12), and anti-backflow devices (11) are installed on the upper air inlet pipe (10) and the lower air inlet pipe (1).

2. An anti-reflux negative suction device as claimed in claim 1, wherein: piston (4) are provided with in the middle of in negative pressure vertical cylinder (3), fixedly connected with piston rod (8) in the middle of piston (4) up end, piston rod (8) upper end is stretched out negative pressure vertical cylinder (3) and is set up and fixedly connected with handle (9) outward, both sides are provided with negative pressure chamber (7) and lower negative pressure chamber (2) respectively about piston (4), go up intake pipe (10) and intake pipe (1) down communicate with last negative pressure chamber (7) and lower negative pressure chamber (2) respectively, both sides are connected with last air inlet (6) and lower air inlet (5) respectively about negative pressure vertical cylinder (3) the left end face.

3. An anti-reflux negative suction device as claimed in claim 2, wherein: the right end of the air outlet pipe (12) is connected with a buffer tank (13), and an exhaust pipe (14) is connected above the right end face of the buffer tank (13).

4. A negative suction device capable of preventing reverse flow according to claim 3, characterized in that: the anti-backflow device (11) comprises a fixed frame (20), an air cavity (15) is formed in the fixed frame (20), the upper air inlet pipe (10) stretches into the air cavity (15) and is provided with and connected with a sealing plate (16), a connector (18) is integrally arranged on the upper end face of the sealing plate (16), and a plurality of connecting holes (19) are formed in the outer surface of the connector (18).

5. An anti-reflux negative suction device as claimed in claim 4, wherein: and an extension spring (17) is fixedly connected between the sealing plate (16) and the side wall of the inner top of the air cavity (15).

6. An anti-reflux negative suction device as claimed in claim 5, wherein: and a sealing ring is arranged at the joint of the sealing plate (16) and the upper air inlet pipe (10).