CN110385317B

CN110385317B - Negative pressure suction gun

Info

Publication number: CN110385317B
Application number: CN201910692737.7A
Authority: CN
Inventors: 任悦; 栗英; 张东芳; 赵冰; 宋彦
Original assignee: First Affiliated Hospital of Zhengzhou University
Current assignee: First Affiliated Hospital of Zhengzhou University
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2021-05-28
Anticipated expiration: 2039-07-30
Also published as: CN110385317A

Abstract

The invention relates to a negative pressure suction gun, which effectively solves the problems that positive pressure flushing liquid splashes and a negative pressure buffer tank is easy to fill; the technical scheme for solving the problem is that the device comprises a box body, wherein two buffer tanks are arranged in the box body, a liquid discharge valve is arranged at the bottom of each buffer tank, and a liquid inlet valve is arranged at the top of each buffer tank; the two liquid inlet valves are connected with a liquid pumping pipe and a gun head through a tee; the upper end of each buffer tank is provided with a first joint; each buffer tank is internally provided with a vertical guide rod, a floating plate capable of floating along with liquid is sleeved on the guide rod, and a plug corresponding to the first joint is arranged on the floating plate; the invention discloses a washing device, which is characterized in that a commutator is arranged in a box body, a valve core capable of rotating in a sealing manner is arranged in the middle of the commutator, two L-shaped channels are arranged on the valve core, one L-shaped channel is communicated with the atmosphere, the other L-shaped channel is connected with a negative pressure pipeline through a rotary joint, the other port of a tee joint is connected with a piston cavity, a piston rod capable of automatically resetting is arranged in the piston cavity, the reciprocating movement of the piston rod can drive the valve core to rotate in a single direction through the rotary joint.

Description

Negative pressure suction gun

Technical Field

The invention relates to the field of medical instrument flushing, in particular to a negative pressure suction gun.

Background

At present, tubular medical instruments such as catheters used after operation need to be cleaned after use, so that the instruments are kept clean and prevented from being polluted. In the prior art, a positive pressure water gun is often adopted to flush such instruments, although the flushing effect is obvious, when the water gun is used, the water pressure is insufficient, the flushing is not clean, the water pressure is too high, and serious liquid splashing can be caused, so that pollution diffusion is caused, the cleaning is not facilitated, and a cleaning site after cleaning needs to be cleaned; meanwhile, when the positive pressure flushing is used, the positive pressure equipment is not provided in all places.

However, the negative pressure suction of hospitals is like that water and electricity are supplied uninterruptedly all day long, the negative pressure suction is served for almost every ward area of the hospital, the use is frequent, the negative pressure suction is an indispensable key device of the hospital, the number of devices using negative pressure is more at present, but the negative pressure suction is used for washing less, the main reason is that a large amount of water needs to be absorbed during the negative pressure washing, so that the negative pressure buffer tank is filled quickly, and the water in the negative pressure buffer tank needs to be poured repeatedly; therefore, there is a need for a negative pressure irrigation device that effectively solves the above problems.

Disclosure of Invention

In view of the above situation, the present invention provides a negative pressure suction gun, which can effectively solve the problems of splashing of the positive pressure flushing liquid and easy filling of the negative pressure buffer tank.

The technical scheme includes that the device comprises a box body, wherein two buffer tanks are arranged in the box body, the bottom of each buffer tank is provided with a one-way outward liquid discharge valve, and the top of each buffer tank is provided with a one-way inward liquid inlet valve; the two liquid inlet valves are connected with a liquid pumping pipe through a tee; the free end of the liquid pumping pipe is connected with a gun head; the upper end of each buffer tank is provided with a first joint; each buffer tank is internally provided with a vertical guide rod, a floating plate capable of floating along with liquid is sleeved on the guide rod, and a plug corresponding to the first joint is arranged on the floating plate;

a commutator is arranged in the box body, a valve core capable of rotating in a sealing manner is arranged in the middle of the commutator, two second joints are uniformly distributed on the side wall of the commutator, and the two second joints are respectively connected with the two first joints one by one through pipelines; the valve core is provided with two L-shaped channels which are in one-to-one correspondence with the two second joints, wherein the upper end of one L-shaped channel penetrates through the valve core and is communicated with the atmosphere, and the upper end of the other L-shaped channel is connected with a rotary joint;

the upper end of the rotary joint is connected with a negative pressure pipeline through a tee joint, the other port of the tee joint is connected with a piston cavity, a piston rod capable of automatically resetting is arranged in the piston cavity, and the reciprocating movement of the piston rod can drive the valve core to rotate in one direction through the rotary joint.

The invention improves the efficiency and the cleanness of the pipeline instrument washing, realizes continuous washing and avoids liquid splashing.

Drawings

FIG. 1 is a schematic view of the overall connection of the present invention.

FIG. 2 is a front sectional view of the case of the present invention.

Fig. 3 is a schematic top view of the commutator, piston chamber, piston rod, etc. components of the present invention.

Fig. 4 is a top sectional view of fig. 3.

FIG. 5 is an enlarged cross-sectional view of the piston chamber.

Fig. 6 is a front sectional view of the commutator (with some parts).

Detailed Description

The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.

As shown in figures 1 to 6, the invention comprises a box body 1, two buffer tanks 2 are arranged in the box body 1, the bottom of each buffer tank 2 is provided with a one-way outward liquid discharge valve 3, and the top of each buffer tank 2 is provided with a one-way inward liquid inlet valve 4; the two liquid inlet valves 4 are connected with a liquid pumping pipe 5 through a tee joint; the free end of the liquid pumping pipe 5 is connected with a gun head 6; the upper end of each buffer tank 2 is provided with a first joint 7; a vertical guide rod 8 is arranged in each buffer tank 2, a floating plate 9 which can float along with liquid is sleeved on each guide rod 8, and a plug 10 corresponding to the first joint 7 is arranged on each floating plate 9;

a commutator 11 is installed in the box body 1, a valve core 12 capable of rotating in a sealing manner is arranged in the middle of the commutator 11, two second joints 13 are uniformly distributed on the side wall of the commutator 11, and the two second joints 13 are respectively connected with the two first joints 7 one by one through pipelines; the valve core 12 is provided with two L-shaped channels 14 which are in one-to-one correspondence with the two second joints 13, wherein the upper end of one L-shaped channel 14 penetrates through the valve core 12 and is communicated with the atmosphere, and the upper end of the other L-shaped channel 14 is connected with a rotary joint 15;

the upper end of the rotary joint 15 is connected with a negative pressure pipeline 16 through a tee joint, the other port of the tee joint is connected with a piston cavity 17, a piston rod 18 capable of automatically resetting is arranged in the piston cavity 17, and the piston rod 18 can reciprocate to drive the valve core 12 to rotate in a single direction through the rotary joint 15.

In order to better use the gun head 6, the shell of the gun head 6 is made of transparent material; the end of the gun head 6 is provided with a cover 20, the cover 20 is made of elastic material, the cover 20 is in a horn shape, the cover 20 has various specifications, and the small end of the cover 20 is sleeved at the end of the gun head 6.

For better liquid drainage, the bottom of the box body 1 is not provided with a bottom plate, a detachable filter screen 21 is connected to the bottom of the box body 1 through bolts, and the filter screen 21 is arranged below the two liquid drainage valves 3.

In order to realize the sealing between the valve core 12 and the inner wall of the commutator 11, a sealing ring 22 matched with the inner wall of the commutator 11 is sleeved on the outer side of the valve core 12.

In order to realize the matching among the rotary joint 15, the gear 23 and the valve core 12, the lower end of the rotary joint 15 is fixedly connected with the center of the upper end surface of the valve core 12, and the connection part is communicated with one L-shaped channel 14; the rotary joint 15 is formed by sleeving an upper part and a lower part, and the upper part and the lower part of the rotary joint 15 can rotate relatively; the lower part of the rotary joint 15 is sleeved with a one-way clutch 27, the one-way clutch 27 is sleeved with a gear 23, and the clockwise rotation of the gear 23 can drive the lower part of the rotary joint 15 and the valve core 12 to rotate clockwise; the piston rod 18 is in the form of a rack engaging with the gear 23, and the piston rod 18 moves rightward, thereby driving the gear 23 to rotate clockwise.

In order to realize the resetting of the piston rod 18, the inner end of the piston rod 18 is provided with a piston; a tension spring 24 positioned between the piston and the inside of the left side of the piston cavity 17 is sleeved on the piston rod 18, a stop block 25 for stopping the stroke of the piston rod 18 is arranged in the piston cavity 17, the piston rod 18 moves from the leftmost side to the rightmost side, and the valve core 12 rotates 180 degrees; the left side of the piston chamber 17 is provided with a plurality of exhaust holes 26.

In order to avoid liquid from entering the negative pressure port, the floating plate 9 has a certain thickness, and the plug 10 can block the first joint 7 after the liquid level in the buffer tank 2 rises to a certain height.

In order to realize the communication between the piston cavity 17 and the tee joint, the right side of the piston cavity 17 is directly connected with the tee joint.

In order to realize rotation and avoid inertia during rotation, the rotary joint 15 is formed by sleeving an upper part and a lower part, the two parts can rotate and are sealed, and a certain resistance is formed between the upper part and the lower part.

When the invention is used, firstly, the box body 1 is placed beside a cleaning pool or a cleaning box, the bottom of the box body 1 corresponds to a sewer pipe, and then a negative pressure pipe 16 on the box body 1 is connected to a negative pressure port uniformly arranged in a hospital; then the instrument can be placed in a cleaning pool or a cleaning box; and water larger than 3/4 is put in the cleaning pool and a proper amount of cleaning agent is added.

Firstly, the main purpose of the whole device is to consider that the water quantity is large when the negative pressure cleaning is carried out, so the device adopts a mode that two buffer tanks 2 work alternately to realize continuous cleaning operation.

The specific method and steps of the cleaning operation are as follows: when cleaning, one hand holds the gun head 6, and the other hand holds the catheter or tubular instrument to be cleaned; buckling the end part of the tubular instrument to be cleaned with a cover 20 at the port of the gun head 6, and placing the other end of the tubular instrument in a cleaning pool; at the moment, the negative pressure port is opened, and water enters the buffer tank 2 on the right side from the inside of the cleaned pipeline through the gun head 6 and the liquid pumping pipe 5 in sequence; meanwhile, air on the upper part of the right buffer tank 2 enters the negative pressure port through the first joint 7, the second joint 13, the commutator 11 and the negative pressure pipeline 16; the inner wall of the tubular instrument is washed by the high-speed water flow, so that the inner wall of the instrument is cleaned, and the temporary stain in the instrument can be washed away along with the water flow.

During the operation of the right buffer tank 2, the following conditions are described:

1. the one-way liquid inlet valves 4 of the two buffer tanks 2 are connected to the liquid pumping pipe 5 through the tee joint, so when the gas in the buffer tank 2 on the right side is pumped, the gas in the buffer tank 2 on the left side cannot be sucked by the buffer tank 2 on the right side through the tee joint because the liquid inlet valve 4 on the right side is the one-way valve; similarly, when the left buffer tank 2 works, the gas in the right buffer tank 2 cannot be sucked; ensuring that liquid can only be drawn from the lance tip 6.

2. Because the commutator 11 is provided with two second joints 13, when the right buffer tank 2 works, the second joint 13 connected with the right buffer tank 2 corresponds to the rotary joint 15 on the valve core 12; the second connection 13, which is likewise connected to the interior of the left buffer vessel 2, is open to the atmosphere.

3. Because the piston rod 18 of the piston cavity 17 is provided with the tension spring 24, when the negative pressure port can absorb gas from the buffer tank 2 on the right side, the pressure in the piston cavity 17 is not enough to attract the piston rod 18 to move leftwards, and therefore the valve core 12 keeps the state shown in fig. 4.

In the process of suction, when the liquid level in the right buffer tank 2 gradually rises, the floating plate 9 sleeved on the guide rod 8 gradually rises, and after the plug 10 is contacted with the first joint 7 on the buffer tank 2, the plug 10 blocks the first joint 7 on the right buffer tank 2 under the double effects of negative pressure and liquid buoyancy; the negative pressure port can no longer absorb gas from the inside of the buffer tank 2 on the right side.

At this time, because the piston cavity 17 is in three-way connection with the negative pressure port, the negative pressure starts acting on the piston cavity 17; the pressure inside the piston chamber 17 is rapidly reduced and the piston rod 18 is attracted to move to the right, i.e. the tension spring 24 is pulled; piston rod 18 will move from its leftmost movement of travel to the rightmost side; the piston rod 18 will drive the gear 23 to rotate 180 degrees clockwise, and at the same time the gear 23 via the one-way clutch 27 will drive the lower part of the rotary joint 15 and the valve core 12 to rotate 180 degrees.

After the valve core 12 rotates 180 degrees, the corresponding states of the two first joints 7 and the two second joints 13 are exchanged. Namely, the right side is originally in a negative pressure state, the left side is in an atmospheric pressure state, and the state is converted into a right atmospheric pressure state and a left negative pressure state. When the right buffer tank 2 is communicated with the atmospheric pressure, the liquid in the right buffer tank 2 is discharged from the liquid discharge valve 3; simultaneously, the left buffer tank 2 starts to work, and liquid is sucked from the liquid inlet valve 4 of the left buffer tank 2 through the liquid suction pipe 5.

When the buffer tank 2 on the left side starts to work, the pressure in the piston cavity 17 is reduced at the moment, the piston rod 18 moves for a stroke from right to left under the action of the tension spring 24, the gear 23 rotates for 180 degrees anticlockwise, and at the moment, the rotary joint 15 does not rotate under the action of the one-way clutch 27, namely, the valve core 12 does not rotate. The whole device keeps the negative pressure state of the buffer tank 2 at the left side.

Similarly, when the left buffer tank 2 is full, the whole device is switched to the right buffer tank 2 again to work. In practical use, seamless switching can be realized, and cleaning operation is not affected.

Two buffer tanks 2 about this device ingenious design, through the alternative work of two buffer tanks 2 about, realized that one of them buffer tank 2 is the negative pressure suction state, and another one buffer tank 2 is loaded for atmospheric pressure drainage, has realized incessant continuous suction to can effectually prevent that liquid from entering into the inside of negative pressure port.

The device realizes the control of pressure by arranging a pipeline connection mode, arranging the piston cavity 17 and utilizing the tension spring 24 in the piston cavity 17, realizes the characteristic that when a suction pipeline is blocked (manually closed or the buffer tank 2 is fully filled), the pressure in the piston cavity 17 is reduced, and the piston can be pulled to move, realizes the control of the valve core 12, and realizes the reversing purpose; the switching of the two buffer tanks 2 is simply and effectively realized, and complicated control devices such as sensors are not needed.

The commutator 11 in the device is a core device of the device, two L-shaped channels 14 in the commutator 11 are utilized, when one buffer tank 2 is sucked under negative pressure, the other buffer tank 2 is under atmospheric pressure, and therefore liquid is automatically discharged. The whole device does not need to be operated manually, and the buffer tank 2 can work all the time through automatic switching.

This device attracts through the negative pressure to wash the apparatus, can effectually prevent that liquid from spattering all around, and during the negative pressure attraction, be different from the malleation and wash simultaneously, can realize more quick and comprehensive washing to the inner wall of pipeline, and to the outside of pipeline, use the brush manual scrub can.

The invention has the advantages of convenient operation, ingenious structure, low cost, convenient manufacture, safety and effectiveness, greatly improves the flushing efficiency and cleanness of pipeline instruments, realizes continuous flushing and avoids splashing of liquid.

Claims

1. The negative pressure suction gun comprises a box body (1) and is characterized in that two buffer tanks (2) are arranged in the box body (1), the bottom of each buffer tank (2) is provided with a one-way outward liquid discharge valve (3), and the top of each buffer tank (2) is provided with a one-way inward liquid inlet valve (4); the two liquid inlet valves (4) are connected with a liquid pumping pipe (5) through a tee; the free end of the liquid pumping pipe (5) is connected with a gun head (6); the upper end of each buffer tank (2) is provided with a first joint (7); each buffer tank (2) is internally provided with a vertical guide rod (8), a floating plate (9) capable of floating along with liquid is sleeved on each guide rod (8), and a plug (10) corresponding to the first joint (7) is arranged on each floating plate (9);

a commutator (11) is installed in the box body (1), a valve core (12) capable of rotating in a sealing mode is arranged in the middle of the commutator (11), two second joints (13) are uniformly distributed on the side wall of the commutator (11), and the two second joints (13) are respectively connected with the two first joints (7) one by one through pipelines; the valve core (12) is provided with two L-shaped channels (14) which are in one-to-one correspondence with the two second connectors (13), the upper end of one L-shaped channel (14) penetrates through the valve core (12) and is communicated with the atmosphere, and the upper end of the other L-shaped channel (14) is connected with a rotary joint (15);

the upper end of the rotary joint (15) is connected with a negative pressure pipeline (16) through a tee joint, the other port of the tee joint is connected with a piston cavity (17), a piston rod (18) capable of automatically resetting is arranged in the piston cavity (17), and the reciprocating movement of the piston rod (18) can drive the valve core (12) to rotate in one direction through the rotary joint (15).

2. The negative pressure suction gun according to claim 1, wherein the housing of the gun head (6) is made of transparent material; a cover (20) is installed at the end part of the gun head (6), the cover (20) is made of elastic materials, the cover (20) is in a horn shape, the cover (20) has various specifications, and the small end of the cover (20) is sleeved at the end part of the gun head (6).

3. The negative pressure suction gun according to claim 1, wherein the bottom of the case (1) has no bottom plate, and a detachable strainer (21) is bolted to the bottom of the case (1), and the strainer (21) is disposed below the two drain valves (3).

4. The negative pressure suction gun according to claim 1, wherein the outer side of the valve core (12) is sleeved with a sealing ring (22) matched with the inner side wall of the commutator (11).

5. The negative pressure suction gun according to claim 1, wherein the lower end of the rotary joint (15) is fixedly connected with the center of the upper end surface of the valve core (12) and is communicated with one L-shaped channel (14); the rotary joint (15) is formed by sleeving an upper part and a lower part, and the upper part and the lower part of the rotary joint (15) can rotate relatively; the lower part of the rotary joint (15) is sleeved with a one-way clutch (27), a gear (23) is sleeved outside the one-way clutch (27), and the clockwise rotation of the gear (23) can drive the lower part of the rotary joint (15) and the valve core (12) to rotate clockwise; the piston rod (18) is in a rack shape meshed with the gear (23), and the piston rod (18) moves rightwards and can drive the gear (23) to rotate clockwise.

6. The negative pressure suction gun according to claim 1, wherein the inner end of the piston rod (18) is provided with a piston; a tension spring (24) positioned between the piston and the inside of the left side of the piston cavity (17) is sleeved on the piston rod (18), a stop block (25) for stopping the stroke of the piston rod (18) is arranged in the piston cavity (17), the piston rod (18) moves from the leftmost side to the rightmost side, and the valve core (12) rotates for 180 degrees; the left side of the piston cavity (17) is provided with a plurality of exhaust holes (26).

7. The negative pressure suction gun according to claim 1, wherein the floating plate (9) has a thickness such that the plug (10) blocks the first connector (7) when the liquid level in the buffer tank (2) rises to a predetermined height.

8. The vacuum suction gun according to claim 1, wherein the right side of the piston chamber (17) is directly connected to a tee.

9. The negative pressure suction gun according to claim 1, wherein the rotary joint (15) is formed by an upper part and a lower part which are sleeved together and can rotate and seal with each other, and a certain resistance is provided between the upper part and the lower part.