CN111569165A

CN111569165A - Negative pressure suction apparatus

Info

Publication number: CN111569165A
Application number: CN202010457850.XA
Authority: CN
Inventors: 唐晓燕
Original assignee: Shanghai Jiading District Central Hospital
Current assignee: Shanghai Jiading District Central Hospital
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-08-25
Anticipated expiration: 2040-05-26
Also published as: CN111569165B

Abstract

The invention discloses a negative pressure aspirator, which comprises a reverse valve and a liquid collecting bottle, wherein the upper end of the reverse valve is provided with an aspirating tube, a check device is arranged in the reverse valve, the check device comprises a second piston and a screw rod, and the left end of the second piston is provided with the screw rod; the below of non return ware is provided with the third piston, the below of third piston is provided with the locker, the locker includes first piston and check lock lever, through set up between suction tube and the liquid collecting bottle and prevent the reverse valve, prevent that the reverse valve is inside to set up a plurality of pistons, non return ware and check lock lever, carry out coordinated control to non return ware and check lock lever with the help of the negative pressure environment in the liquid collecting bottle, under the negative pressure environment, the non return ware can be opened and make in suction tube can inhale the liquid such as blood in the liquid collecting bottle, negative pressure environment does not have sometimes, the non return ware can be closed immediately and make the liquid in the suction tube when changing the suction bag, liquid can not lead to the operating table pollution to cause the patient to infect against the current.

Description

Negative pressure suction apparatus

Technical Field

The invention relates to the technical field of medical instruments, in particular to a negative pressure aspirator.

Background

The negative pressure suction device is a tool for manufacturing the negative pressure state of a suction head of the negative pressure suction device by a certain method, and substances outside the suction head are extruded to the suction head so as to finish the suction effect. The liquid collecting bottle is provided with two hose connectors, one hose connector is connected with the negative pressure terminal, and the other hose connector is connected with the working cavity. When the negative pressure terminal is connected, air negative pressure is generated in the liquid collecting bottle, and the negative pressure guides dirt, such as dirty blood, phlegm and the like; flows into the liquid collecting bottle from the other hose. When the liquid in the liquid collecting bottle reaches a certain height, the stop valve on the liquid collecting bottle cap starts to work to cut off the liquid inflow pipeline, so that the liquid in the liquid collecting bottle is prevented from overflowing due to interference. In consideration of different drainage amounts, a plurality of liquid collecting bottles can be cascaded, so that a large amount of liquid can be extracted and stored. When the existing negative pressure suction apparatus is used, as the capacity of the negative pressure suction apparatus is limited, the medical staff in the operation needs to replace the suction bag, the phenomenon of liquid backflow can occur, and the pollution on the operation table can be caused after the liquid backflow, so that the infection is easily caused.

Disclosure of Invention

The invention aims to provide a negative pressure aspirator, which is characterized in that an anti-reverse valve is arranged between a suction tube and a liquid collection bottle, when negative pressure exists in the liquid collection bottle, a check device of the anti-reverse valve can be opened, meanwhile, the anti-reverse valve can be fixed with a liquid inlet tube by virtue of an internal locker, when no negative pressure exists in the liquid collection bottle, the check device of the anti-reverse valve can be closed, the locker is closed to cancel the fixation with the liquid inlet tube, medical staff can replace a suction bag conveniently, the pollution on an operating table caused by liquid reverse flow is avoided, and the infection of patients is easily caused.

In order to achieve the purpose, the negative pressure aspirator provided by the invention comprises a reverse-flow prevention valve and a liquid collecting bottle, wherein the upper end of the reverse-flow prevention valve is provided with an aspirating tube, a check device is arranged in the reverse-flow prevention valve, a connecting buckle is arranged below the check device, an upper cover of the liquid collecting bottle is arranged below the connecting buckle, and the upper cover of the liquid collecting bottle is arranged above the liquid collecting bottle (6);

a communicating pipe is arranged on the left side of the liquid collecting bottle, a negative pressure generator connecting pipe is arranged at the other end of the communicating pipe, the end of the negative pressure generator connecting pipe is connected with a negative pressure generator, and a negative pressure pipe connected with the liquid collecting bottle is arranged below the negative pressure generator connecting pipe;

the non-return device comprises a pipe body, a cross shaft is horizontally arranged in the pipe body, two semicircular valve membranes penetrate through the cross shaft, a torsion spring is arranged on the cross shaft and abuts against the two semicircular valve membranes, and a circle of sealing ring is arranged on the upper portion, located on the semicircular valve membrane, of the inner wall of the pipe body.

In the vacuum extractor provided by the present invention, the non-return device may be: the screw rod is arranged at the left end of the second piston; the left end of the spiral rod is provided with a flap membrane, a third piston is arranged below the backstop, the left side of the third piston is provided with a spring, the left side of the spring is provided with a pneumatic valve, a locker is arranged below the third piston and comprises a first piston and a locking rod, and the left side of the first piston is provided with the locking rod; a connecting buckle is arranged below the locking rod, a liquid inlet pipe is arranged on the left side of the connecting buckle, an upper liquid collecting bottle cover is arranged below the liquid inlet pipe, and the upper liquid collecting bottle cover is arranged above the liquid collecting bottle; the left side of collecting bottle is provided with communicating pipe, the other end of communicating pipe is provided with negative pressure generator connecting pipe, the end of negative pressure generator connecting pipe is connected with a negative pressure generator, the below of negative pressure generator connecting pipe is provided with the negative pressure pipe, the top of collecting bottle upper cover is provided with the fixed plate and detains.

Preferably, the liquid collecting bottle is transparent plastic material, communicating pipe and liquid collecting bottle are plug-in connection, the other end and the negative pressure generator connecting pipe of communicating pipe are adhesive connection, the lower extreme negative pressure pipe sealing connection of negative pressure generator connecting pipe, the negative pressure pipe is a whole with the liquid collecting bottle upper cover.

Preferably, the upper port of the anti-reverse valve is fixedly connected with the suction tube through gluing, the lower end of the anti-reverse valve is connected with the liquid inlet tube through a connecting buckle in an inserting manner, and the liquid inlet tube and the upper cover of the liquid collecting bottle are integrated.

Further, the pneumatic valve is fixedly connected with a valve body of the anti-reverse valve, the pneumatic valve can keep the liquid collecting bottle and a cavity on the left side of the third piston in a communicated state when the air pressure value reaches a set value, the second piston and the spiral rod are integrated, the first piston and the locking rod are integrated, the right sides of the second piston and the third piston are cavities, the cavities are sealed through the third piston, the first piston and the second piston, the second piston is in sliding connection with the cavity in the anti-reverse valve, the spiral rod and the valve sheet are in threaded rotating connection, the valve sheet can move from a horizontal state to a vertical state in the stroke of the spiral rod, the first piston is in sliding connection with the cavity in the anti-reverse valve, the third piston is in sliding connection with the cavity in the anti-reverse valve, the spring is fixedly connected to the left side of the third piston, and the rotating connection position of the valve sheet and the non-return device is provided with a torsion spring which can help the valve sheet to rebound rapidly, the joint of the inner wall of the tube of the backstop and the arc edge of the flap sheet is fixedly connected with a rubber ring, so that liquid in the suction tube can be prevented from flowing back.

Further, the hob is the slide bar for its right side of circular plastic sheet, can seal the pipe diameter in the anti-reverse valve when the hob removes the left side, be provided with the plastics ball in the connect buckle, get into behind the plastics ball through the spring support feed liquor pipe wall in the draw-in groove that sets up and then fixed to the feed liquor pipe.

Furthermore, the rear end of the fixing plate buckle is fixedly connected with the rear wall of the liquid collecting bottle through a soft rubber strip, and the front end of the fixing plate buckle is fixedly connected with the liquid collecting bottle through an elastic buckle.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the anti-backflow valve is arranged between the suction tube and the liquid collection bottle, and the air pressure valve, the plurality of pistons, the non-return device and the locking rod are arranged inside the anti-backflow valve, so that the non-return device and the locking rod are controlled in a linkage manner by virtue of the negative pressure environment in the liquid collection bottle, the non-return device can be opened under the negative pressure environment, so that the suction tube can suck liquid such as blood into the liquid collection bottle, and when the negative pressure environment is absent, the non-return device can be immediately closed, so that the liquid in the suction tube can be immediately closed when a suction bag in the liquid collection bottle is replaced, the pollution of an operating table caused.

2. The locking device is arranged in the anti-reverse valve and is arranged at the liquid inlet pipe of the liquid collecting bottle, so that simple plug-in connection can be realized and the anti-reverse valve can be pulled out at any time when no negative pressure exists in the bottle, and the anti-reverse valve can be firmly clamped at the liquid inlet through the locking device and cannot be pulled out by mistake when the negative pressure exists in the bottle.

Drawings

FIG. 1 is a schematic view of piping connection according to embodiment 1 of the present invention;

FIG. 2 is a schematic sectional perspective view taken along line A-A of FIG. 1;

FIG. 3 is a schematic structural view of example 2 of the present invention;

FIG. 4 is a front view of the structure of embodiment 2 of the present invention;

FIG. 5 is a top view of the structure of FIG. 3;

FIG. 6 is a cross-sectional view taken along line E-E of FIG. 5;

FIG. 7 is a schematic structural view of a multi-functional check valve according to embodiment 2 of the present invention;

FIG. 8 is an enlarged view of a portion of FIG. 6 at B;

fig. 9 is an internal structural view of a closed state of the check valve according to embodiment 2 of the present invention;

FIG. 10 is a cross-sectional view taken along line C-C of FIG. 8;

FIG. 11 is a cross-sectional view taken along line D-D of FIG. 9;

fig. 12 is a schematic view of the spiral structure in embodiment 2 of the present invention.

In the figure: 1-communicating pipe, 2-negative pressure generator connecting pipe, 3-negative pressure pipe, 4-liquid collecting bottle upper cover, 5-fixing plate buckle, 6-liquid collecting bottle, 7-liquid inlet pipe, 8-connecting buckle, 9-locker, 10-backstop, 11-suction pipe, 12-anti-backstop valve, 13-third piston, 14-pneumatic valve, 91-first piston, 92-locking rod, 101-second piston, 102-screw rod, 1021-pipe body, 103-semicircular valve membrane, 104-torsion spring, 105-transverse shaft and 106-sealing ring.

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.

Example 1

Referring to fig. 1 to 2, the present invention provides a negative pressure aspirator, which includes an anti-backflow valve 12 and a liquid collection bottle 6. The liquid collecting bottle 6 is made of transparent plastic, the communicating pipe 1 is in plug-in connection with the liquid collecting bottle 6, the other end of the communicating pipe 1 is in adhesive connection with the negative pressure generator connecting pipe 2, the lower end negative pressure pipe 3 of the negative pressure generator connecting pipe 2 is in sealing connection, and the negative pressure pipe 3 and the liquid collecting bottle upper cover 4 are integrated. The liquid collecting bottle 6 is also connected with a connecting buckle 8 by gluing. The upper end of the reverse-flow prevention valve 12 is provided with a suction tube 11, and the lower end of the reverse-flow prevention valve 12 is connected with the liquid collecting bottle 6 through a connecting buckle 8. The check device 10 is arranged inside the anti-reverse valve 12, the check device 10 comprises a tube body 1021 for respectively connecting the suction tube 11 and the connecting buckle 8, a cross shaft 105 is horizontally arranged in the tube body 1012, two semicircular flap membranes 103 penetrate through the cross shaft 105, a torsion spring 104 is arranged on the cross shaft 105, the torsion spring 104 abuts against the two semicircular flap membranes 103, and a circle of sealing ring 106 is arranged above the semicircular flap membranes 103 of the tube body 1021.

When the negative pressure suction apparatus does not generate negative pressure, the torsion spring 104 on the cross shaft 105 acts to push against the two semicircular valve diaphragms 103, so that the two semicircular valve diaphragms 103 respectively push against the ring sealing ring 106, and a closed state is formed in the tube body, thereby preventing liquid leakage. When the vacuum extractor generates negative pressure, the generated suction force opens the two semicircular valve sheets 103 (opens downward in the direction shown in fig. 2), and the extracted liquid enters the liquid collecting bottle 6. When the liquid is stopped to be pumped, the torsion spring 104 connected to the rotating shaft 105 can enable the two semicircular valve diaphragms 103 to be quickly rebounded and closed due to no negative pressure.

Example 2

Referring to fig. 3 to 12, the present invention is a negative pressure aspirator formed by adding a plurality of components on the basis of embodiment 1, and the negative pressure aspirator comprises an anti-reverse valve 12 and a liquid collection bottle 6, wherein the upper end of the anti-reverse valve 12 is provided with an aspiration tube 11, a check device 10 is arranged inside the anti-reverse valve 12, a third piston 13 is arranged below the check device 10, the left side of the third piston 13 is provided with a spring, the left side of the spring is provided with a pneumatic valve 14, a locker 9 is arranged below the third piston 13, the locker 9 comprises a first piston 91 and a locking rod 92, and the left side of the first piston 91 is provided with the locking rod 92; a connecting buckle 8 is arranged below the locking rod 92, a liquid inlet pipe 7 is arranged on the left side of the connecting buckle 8, a liquid collecting bottle upper cover 4 is arranged below the liquid inlet pipe 7, and the liquid collecting bottle upper cover 4 is arranged above the liquid collecting bottle 6; the left side of the liquid collecting bottle 6 is provided with a communicating pipe 1, the other end of the communicating pipe 1 is provided with a negative pressure generator connecting pipe 2, the end of the negative pressure generator connecting pipe 2 is connected with a negative pressure generator, a negative pressure pipe 3 is arranged below the negative pressure generator connecting pipe 2, and a fixing plate buckle 5 is arranged above the liquid collecting bottle upper cover 4.

The upper port of the anti-reverse valve 12 is fixedly connected with the suction tube 11 through gluing, the lower end of the anti-reverse valve 12 is connected with the liquid inlet tube 7 through a connecting buckle 8 in an inserting way, the liquid inlet tube 7 and the liquid collecting bottle upper cover 4 are integrated, the air pressure valve 14 is fixedly connected with the valve body of the anti-reverse valve 12, the air pressure valve 14 can keep the left cavities of the liquid collecting bottle 6 and the third piston 13 in a communicating state when the air pressure value reaches the set value, the second piston 101 and the screw rod 102 are integrated, the first piston 91 and the locking rod 92 are integrated, the right sides of the second piston 101 and the third piston 13 are cavities, the cavities are sealed through the third piston 13, the first piston 91 and the second piston 101, the second piston 101 is connected with the cavity in the anti-reverse valve 12 in a sliding way, the first piston 91 is connected with the cavity in the anti-reverse valve 12 in a sliding way, the screw rod 102 and the valve plate 103 are in a threaded rotary connection, and the valve plate 103 can move to a vertical state from a horizontal state in the stroke of the, the third piston 13 is connected with the cavity in the anti-return valve 12 in a sliding way, the left side of the third piston 13 is fixedly connected with a spring, the torsional spring is arranged at the rotary joint of the valve sheet 103 and the check device 10 to help the valve sheet 103 to rebound quickly, the joint of the inner wall of the pipe of the check device 10 and the arc edge of the valve sheet 103 is fixedly connected with a rubber ring, can prevent the liquid in the suction tube 11 from flowing back, the spiral rod 102 is a circular plastic sheet, the right side of the spiral rod 102 is a sliding rod, the pipe diameter in the anti-backflow valve 12 can be sealed when the spiral rod 102 moves to the left side, a plastic round ball is arranged in the connecting buckle 8, get into the draw-in groove that the pipe wall of feed liquor pipe 7 set up and then fixed 7 to the feed liquor pipe after supporting the plastics ball through the spring, the rear end of fixed plate buckle 5 passes through soft adhesive tape fixed connection with the back wall of collecting liquid bottle 6, and the front end of fixed plate buckle 5 passes through elasticity buckle and collecting liquid bottle 6 fixed connection.

When the invention is used, the anti-reverse valve 12 is arranged between the suction tube 11 and the liquid collection bottle 6, the air pressure valve 14, the third piston 13, the check device 10 and the locking rod 9 are arranged in the anti-reverse valve 12, under the negative pressure environment, when the air pressure value reaches the set value, the air pressure valve 14 is opened, the third piston 13 overcomes the elastic force of the left side spring under the action of left side negative pressure, the third piston 13 slides to the left in the cavity under the action of negative pressure, the pressure of the right cavity is reduced, the second piston 101 slides to the right side under the action of negative pressure and drives the spiral rod 102 to move to the right, so that the valve piece 103 moves to the vertical state from the horizontal state, liquid can pass through the hole opened by the valve piece 103, meanwhile, the first piston 91 slides to the left under the action of negative pressure to maintain the pressure stability in the cavity, the first piston 91 drives the locking rod 92 to move to the left to be inserted into the clamping groove of the liquid inlet tube 7, the liquid inlet pipe 7 and the anti-reverse valve 12 are locked, at the moment, the anti-reverse valve 12 can be firmly clamped at the liquid inlet pipe 7 through the locker 9 without being pulled out by mistake, when the negative pressure environment of the liquid collecting bottle 6 is lost, the air pressure valve 14 is closed, the third piston 13 can slide to the right side of the cavity under the elastic force of the left side spring, the pressure of the cavity at the right side can be increased, the second piston 101 can slide to the left side under the pressure in the cavity and drive the spiral rod 102 to move leftwards, so that the valve diaphragm 103 moves to the horizontal state from the vertical state to seal the through hole above the valve diaphragm 103, meanwhile, the first piston 91 can slide rightwards under the pressure in the cavity to maintain the pressure in the cavity to be stable, the first piston 91 can drive the locking rod 92 to move rightwards to be separated from the clamping groove of the liquid inlet pipe 7, so that the anti-reverse valve 12 can be easily pulled out from the liquid, the negative pressure environment can not realize the quick plug of the anti-reverse valve 12 sometimes, and when the suction bag in the liquid collecting bottle 6 is replaced, the pollution of an operating table caused by the reverse flow can not happen to cause the infection of a patient.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A negative pressure aspirator comprises a reverse valve (12) and a liquid collection bottle (6), wherein an aspirating tube (11) is arranged at the upper end of the reverse valve (12), a check device (10) is arranged inside the reverse valve (12), a connecting buckle (8) is arranged below the check device (10), a liquid collection bottle upper cover (4) is arranged below the connecting buckle (8), and the liquid collection bottle upper cover (4) is arranged above the liquid collection bottle (6);

a communicating pipe (1) is arranged on the left side of the liquid collecting bottle (6), a negative pressure generator connecting pipe (2) is arranged at the other end of the communicating pipe (1), a negative pressure generator is connected to the end of the negative pressure generator connecting pipe (2), and a negative pressure pipe (3) connected with the liquid collecting bottle (6) is arranged below the negative pressure generator connecting pipe (2);

non return ware (10) include a body (1021), be provided with a cross axle (105) in body (1021) horizontally, two semi-circular lamella pieces (103) are worn to be equipped with in cross axle (105), be equipped with a torsional spring (104) on cross axle (105), torsional spring (104) support in two semi-circular lamella pieces (103), body (1021) inner wall is located semi-circular lamella piece (103) top and is equipped with round sealing washer (106).

2. The negative pressure aspirator according to claim 1, wherein: a third piston (13) is arranged below the backstop (10), a spring is arranged on the left side of the third piston (13), a pneumatic valve (14) is arranged on the left side of the spring, a locker (9) is arranged below the third piston (13), the locker (9) comprises a first piston (91) and a locking rod (92), and the locking rod (92) is arranged on the left side of the first piston (91);

a connecting buckle (8) is arranged below the locking rod (92), a liquid inlet pipe (7) is arranged on the left side of the connecting buckle (8), a liquid collecting bottle upper cover (4) is arranged below the liquid inlet pipe (7), and the liquid collecting bottle upper cover (4) is arranged above the liquid collecting bottle (6);

the left side of collecting bottle (6) is provided with communicating pipe (1), the other end of communicating pipe (1) is provided with negative pressure generator connecting pipe (2), the end of negative pressure generator connecting pipe (2) is connected with a negative pressure generator, the below of negative pressure generator connecting pipe (2) is provided with negative pressure pipe (3), the top of collecting bottle upper cover (4) is provided with fixed plate and detains (5).

3. The negative pressure aspirator according to claim 1, wherein: the utility model discloses a negative pressure generator, including collecting liquid bottle (6), communicating pipe (1) and collecting liquid bottle (6), the other end of communicating pipe (1) is adhesive bonding with negative pressure generator connecting pipe (2), the lower extreme negative pressure pipe (3) sealing connection of negative pressure generator connecting pipe (2), negative pressure pipe (3) are a whole with collecting liquid bottle upper cover (4).

4. The negative pressure aspirator according to claim 1, wherein: the upper port of the anti-reverse valve (12) is fixedly connected with the suction tube (11) through gluing, the lower end of the anti-reverse valve (12) is connected with the liquid inlet tube (7) through a connecting buckle (8) in an inserting manner, and the liquid inlet tube (7) and the liquid collecting bottle upper cover (4) are integrated.

5. The negative pressure aspirator according to claim 1, wherein: the air pressure valve (14) is fixedly connected with a valve body of the anti-reverse valve (12), the air pressure valve (14) enables cavities on the left sides of the liquid collecting bottle (6) and the third piston (13) to be kept in a communicated state when the air pressure value reaches a set value, the second piston (101) and the spiral rod (102) are integrated, the first piston (91) and the locking rod (92) are integrated, the right sides of the second piston (101) and the third piston (13) are cavities, the cavities are sealed through the third piston (13), the first piston (91) and the second piston (101), the second piston (101) is in sliding connection with the cavity in the anti-reverse valve (12), the spiral rod (102) is in threaded rotating connection with the flap membrane (103), the flap membrane (103) can move from a horizontal state to a vertical state in the stroke of the spiral rod (102), and the first piston (91) is in sliding connection with the cavity in the anti-reverse valve (12), the vacuum suction tube is characterized in that the third piston (13) is in sliding connection with a cavity in the anti-backflow valve (12), a spring is fixedly connected to the left side of the third piston (13), a torsion spring is arranged at the rotating connection position of the flap membrane (103) and the check device (10) to help the flap membrane (103) to rebound rapidly, and a rubber ring is fixedly connected to the joint position of the inner wall of the tube of the check device (10) and the arc edge of the flap membrane (103) to prevent liquid in the suction tube (11) from flowing back.

6. The negative pressure aspirator according to claim 1, wherein: the utility model discloses a valve is characterized in that hob (102) is the slide bar for its right side of circular plastic sheet, hob (102) can seal the pipe diameter in anti-reverse valve (12) when removing the left side, be provided with the plastics ball in connect buckle (8), get into behind the plastics ball through the spring-supported in the draw-in groove of feed liquor pipe (7) pipe wall setting and then fixed feed liquor pipe (7).

7. The negative pressure aspirator according to claim 1, wherein: the rear end of the fixing plate buckle (5) is fixedly connected with the rear wall of the liquid collecting bottle (6) through a soft adhesive tape, and the front end of the fixing plate buckle (5) is fixedly connected with the liquid collecting bottle (6) through an elastic buckle.