CN110215557B

CN110215557B - Injection type flusher

Info

Publication number: CN110215557B
Application number: CN201910579535.1A
Authority: CN
Inventors: 郭朝辉; 邱会强
Original assignee: Langfang Xinyao Medical Devices Co ltd
Current assignee: Langfang Xinyao Medical Devices Co ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2024-04-26
Anticipated expiration: 2039-06-28
Also published as: CN110215557A

Abstract

The application discloses an injection type flusher, which comprises a shell; the reciprocating injection apparatus is installed inside the housing, and includes: the plunger comprises a cross rod, a plug is fixed at the front end of the cross rod, and a waist-shaped ring is sleeved at the rear end of the cross rod; the injection cavity is provided with a first channel, a second channel and a third channel which are communicated with each other; the plug connector comprises a fixed plate, the fixed plate is fixedly connected with the shell, the fixed plate is provided with a first through hole and a second through hole, the first insertion pipe is fixed in the first through hole, the second insertion pipe is fixed in the second through hole, one end of the second insertion pipe is inserted into the first channel, and the liquid suction check valve is arranged in the second channel; the liquid outlet one-way valve is arranged in the first channel; the plug is positioned in the third channel and used for reciprocating in the third channel, so that the liquid suction one-way valve is opened and closed, the liquid outlet one-way valve is closed and opened, and flushing liquid enters the second channel and is discharged from the first channel. Convenient use and high reliability.

Description

Injection type flusher

Technical Field

The application relates to the technical field of medical equipment, in particular to an injection type flusher.

Background

In recent years, the proportion of wound surgery and orthopedic surgery is continuously increased, wound surface flushing and infection prevention in the treatment process are very important, and therefore, wound cleaning equipment is continuously researched and developed at home and abroad, a flusher is widely used in China, and the current flusher is poor in use convenience and reliability. Therefore, there is a need for an injection type irrigator that is convenient to use and highly reliable.

Disclosure of Invention

The present application aims to overcome or at least partially solve or alleviate the above-mentioned problems.

According to one aspect of the present application, there is provided an injection type irrigator comprising: a housing; a reciprocating injection device installed inside the housing for reciprocally pumping and injecting a washing liquid; the reciprocating injection apparatus includes: a plunger comprising an integrally formed cross bar, a plug and a waisted loop; an injection cavity having a first channel, a second channel and a third channel in communication with each other; the plug connector comprises a fixed plate, the fixed plate is fixedly connected with the shell, the fixed plate is provided with a first through hole and a second through hole, a first insertion pipe is fixed in the first through hole, a second insertion pipe is fixed in the second through hole, and one end of the second insertion pipe is inserted into the first channel and communicated with the first channel; the liquid suction one-way valve is arranged in the second channel; a liquid outlet check valve installed inside the first passage; the plug is located in the third channel and used for reciprocating in the third channel, so that the liquid suction one-way valve is opened and closed, the liquid outlet one-way valve is closed and opened, and then the flushing liquid enters the second channel and is discharged from the first channel.

Optionally, an extraction tube is connected to an end of the second channel, and the second channel and the extraction tube form an extraction channel.

Optionally, one end of the first cannula is connected with a liquid return pipe, and the first cannula and the liquid return pipe form a liquid return channel.

Optionally, the tail part of the liquid outlet one-way valve is in a first inverted cone shape or in a waist drum shape or in a spherical shape; the tail part of the liquid suction one-way valve is in a second inverted cone shape or a waist drum shape or a sphere shape.

Optionally, the liquid outlet one-way valve is umbrella-shaped, waist drum-shaped or spherical; the liquid-pumping one-way valve is umbrella-shaped, waist drum-shaped or spherical.

Optionally, the device further comprises a driving device, which is installed inside the housing and connected with the reciprocating injection device, and the driving device comprises: driving a bevel gear; the driven gear is meshed with the driving bevel gear, a central hole is formed in the middle of the driven gear, and the central hole is connected with the shell through a shaft; the top surface of the driven gear is provided with an eccentric ring, and the eccentric ring is in sliding connection with the waist-shaped ring.

Optionally, electrical apparatus located inside and outside the housing and connected to the driving means, the electrical apparatus comprising: a DC motor; a gear switch connected with the direct current motor; and a battery case connected with the gear switch.

Optionally, a rotor of the direct current motor is fixedly connected with the driving bevel gear.

Optionally, the first channel is disposed coaxially with the second cannula.

Optionally, the device further comprises a jet pipe, wherein the jet pipe comprises: a cover connected with the housing and having a cavity and a third through hole, wherein the cavity is communicated with the other end of the first cannula; the first end of the thick pipe and the third through hole are integrally formed or formed in a split manner; and a thin tube located inside the thick tube; the first end of the thin tube is communicated with the other end of the second cannula to form a liquid outlet channel, and the second end of the thin tube is close to an affected part and used for spraying the flushing liquid; the thick tube, the cavity and the other end of the first cannula form a liquid return channel, and the second end of the thick tube is close to an affected part and used for recycling used flushing liquid.

The injection type flusher comprises a plunger, an injection cavity, a plug connector, a liquid suction one-way valve and a liquid outlet one-way valve, wherein the plunger comprises a cross rod, a plug is fixed at the front end of the cross rod, a waist-shaped ring is sleeved at the rear end of the cross rod, the injection cavity is provided with a first channel, a second channel and a third channel which are mutually communicated, the plug connector comprises a fixed plate, the fixed plate is fixedly connected with the shell, the fixed plate is provided with a first through hole and a second through hole, the first insertion pipe is fixed in the first through hole, the second insertion pipe is fixed in the second through hole, one end of the second insertion pipe is inserted into the first channel and communicated with the first through hole, the liquid suction one-way valve is arranged in the second channel, the liquid outlet one-way valve is arranged in the first channel, and the plug is positioned in the third channel and used for reciprocating motion in the third channel, so that the liquid suction one-way valve is opened and closed, the one-way valve is opened and opened, and then the second channel is accessed into the first channel, and the flushing liquid is conveniently used and reliably injected.

The above, as well as additional objectives, advantages, and features of the present application will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present application when read in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the application will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

FIG. 1 is a schematic perspective view of an injection washer according to one embodiment of the present application;

FIG. 2 is a cross-sectional top view of A-A of the injection washer device of FIG. 1;

Fig. 3 is a cross-sectional view of the jet stack of the injection washer device of fig. 1.

The marks in the figure:

1-a housing; 2-direct current motor; 3-driving a bevel gear; 4-driven gears; 41-eccentric ring; 5-a plunger; 501-a cross bar; 502-plug; 503-waist-shaped ring; 6, a liquid return pipe; 7-a plug-in connector; 701-a first cannula; 702-a second cannula; 703-a fixing plate; 704-the other end of the second cannula; 705-the other end of the first cannula; 8-an injection cavity; 801-a first channel; 802-a second channel; 803-third channel; 9-a liquid extracting tube; 10-axis; 11-a liquid outlet one-way valve; 1101-a first inverted cone shape; 12-a liquid-pumping one-way valve; 1201-second inverted cone shape; 13-gear switch; 14-a jet pipe; 141-a cavity; 142-a cover; 143-a third through hole; 144-thick pipe; 145-a first end of the raw tube; 146-tubule; 147-a first end of the tubule; 148-a second end of the tubule; 149-second end of the raw tube.

Detailed Description

Fig. 1 is a schematic perspective view of an injection syringe according to an embodiment of the present application, and fig. 2 is a cross-sectional top view of A-A of the injection syringe device shown in fig. 1. An injection type irrigator may generally comprise a housing 1, a drive device, a reciprocating injection device and an electrical device. The reciprocating injection device is arranged in the shell 1 and used for pumping flushing liquid in a reciprocating manner and then injecting the flushing liquid, the driving device and the reciprocating injection device are oppositely arranged in the shell 1, the driving device drives the reciprocating injection device to pump the flushing liquid, and the injection electrical device provides power and control for the driving device. The electric device provides power and control, and the driving device drives the reciprocating injection device to realize extraction and injection of flushing liquid, so that the device has the characteristics of compact structure, simple and accurate transmission, stable flow and pressure, convenient use and high reliability.

Referring to fig. 1 and 2, in one embodiment, a reciprocating injection device may generally include a plunger 5, an injection cavity 8, a hub 7, an access check valve 12, and an access check valve 11. Wherein the plunger 5 is comprised of a cross bar 501, a plug 502 and a kidney-shaped ring 503. Specifically, a plug 502 is engaged with the front end of the cross bar 501, and a waist ring 503 is engaged with the rear end of the cross bar 501, or may be integrally formed. The cross bar 501, plug 502 and waist ring 503 are arranged in an axis. Optionally, the cross bar 501, the plug 502 and the waist-shaped ring 503 are made of plastic or nylon to avoid rust, at least one groove is formed in the plug 502, and a sealing ring (not labeled in the figure) is sleeved on the groove. The injection cavity 8 has a first channel 801, a second channel 802 and a third channel 803 which are in communication with each other, and further the injection cavity 8 is "U" shaped. The plug 7 consists of a fixing plate 703, a first cannula 701 and a second cannula 702. The first insertion tube 701 and the second insertion tube 702 are formed integrally or separately, the fixing plate 703 is connected with the housing 1 by threads or by clamping, the fixing plate 703 is processed with a first through hole and a second through hole, the first insertion tube 701 is adhered and fixed to the first through hole, the second insertion tube 702 is adhered and fixed to the second through hole, one end of the second insertion tube 702 is inserted into the first channel 801, and the second insertion tube 702 is sealed, sleeved, adhered and communicated to avoid outflow of flushing fluid. The liquid-pumping check valve 12 is clamped in the second channel 802, and the liquid-discharging check valve 11 is clamped in the first channel 801. Specifically, the plug 502 is located inside the third channel 803, and reciprocates inside the third channel 803 to open and close the liquid-drawing check valve 12 and to close and open the liquid-discharging check valve 11, so that the flushing liquid enters the second channel 802 and is discharged from the first channel 801, and the first channel 801 and the second cannula 702 are coaxially arranged to facilitate the flushing liquid flow. The operation is convenient, and simple structure, structural optimization is reasonable.

Referring to fig. 1, in the above embodiment, optionally, an extractor tube 9 is connected to an end of the second channel 802 by glue sealing, and the second channel 802 and the extractor tube 9 form an extractor channel for extracting the rinse liquid, where the extractor tube 9 is a hose. One end of the first cannula 701 is connected with a liquid return pipe 6 in a sealing way through glue, the first cannula 701 and the liquid return pipe 6 form a liquid return channel, used flushing liquid is recovered, and the liquid return pipe 6 is a hose.

Referring to fig. 2, in the above embodiment, optionally, the tail of the liquid outlet check valve 11 may be in a first inverted cone 1101, a waist drum shape or a sphere shape, and the tail of the liquid outlet check valve 12 may be in a second inverted cone 1201, a waist drum shape or a sphere shape. The liquid outlet one-way valve 11 is umbrella-shaped, the liquid pumping one-way valve 12 is umbrella-shaped, and the opening and closing effects of the liquid outlet one-way valve 11 and the liquid pumping one-way valve 12 are good.

In the above embodiments, as shown in fig. 1, the driving means may alternatively generally comprise a driving bevel gear 3 and a driven gear 4. Wherein, driven gear 4 and drive bevel gear 3 intermesh, be equipped with the centre bore at driven gear 4's middle part, this centre bore passes through axle 10 with shell 1 to be connected, and driven gear 4 and drive bevel gear 3 are current. The top surface of the driven gear 4 is provided with an eccentric ring 41, and the eccentric ring 41 is in sliding connection with a waist-shaped ring 503.

Referring to fig. 1, in the above embodiment, alternatively, the electric device may generally include a direct current motor 2, a gear switch 13, and a battery case (not labeled in the drawings). The direct current motor 2, the gear switch 13 and the direct current motor 2 are electrically connected through a circuit, and the battery box and the gear switch 13 are electrically connected through a circuit to realize power supply. The rotor of the direct current motor 2 is welded with the drive bevel gear 3 in a close-fit and fixed connection so as to control the rotation of the drive bevel gear 3.

Fig. 3 is a cross-sectional view of the jet stack of the injection washer device of fig. 1. In one embodiment, the injection tube 14 is further comprised of an injection tube 14 comprising a cap 142, a wide tube 144, and a narrow tube 146. Wherein, lid 142 passes through screw thread or joint with shell 1 and connects, and easy dismounting, lid 142 have cavity 141 and third through hole 143, and cavity 141 communicates with the other end 705 of first intubate 701. Optionally, the cover 142 is made of plastic or nylon, and its shape is adapted to the housing 1. The first end 145 of the thick tube 144 may be integrally formed with the third through hole 143 or may be formed separately, and may be sealed, with the thin tube 146 being positioned inside the thick tube 144.

Specifically, the first end 147 of the tubule 146 is closely connected to the other end 704 of the second cannula 702 in a bonding and plugging manner to form a liquid outlet channel, and the second end 148 of the tubule 146 is close to the affected part for spraying the rinse liquid to clean the affected part. The large tube 144 forms a return fluid path with the lumen 141 and the other end 705 of the first cannula 701, and the second end 149 of the large tube 144 is positioned adjacent the lesion for the recovery of used irrigation fluid. The cleaning of the affected part is convenient, the structure is simple, and the operation is simple.

Specifically: the reciprocating injection apparatus includes: the injection device comprises a plunger 5, an injection cavity 8, a plug connector 7, a liquid outlet one-way valve 11 and a liquid suction one-way valve 12. The injection cavity 8 is a three-way special-shaped transparent plastic part, the plug-in component 7 is a two-position four-way transparent plastic part, and the two-position four-way is in a circular tube shape. The first cannula 701 is arranged in a first channel 801 at the front end of the injection cavity 8 and communicated with the first channel to form a liquid passing channel, and the second cannula 702 of the plug connector 7 is connected with the liquid return pipe 6 to form a liquid return channel. The second channel 802 at the rear end of the injection cavity 8 is connected with the liquid suction tube 9 to form a liquid suction channel. The plug 502 of the plunger 5 can be drawn linearly back and forth in the third passage 803 of the injection cavity 8. The liquid outlet one-way valve 11 is umbrella-shaped, the tail part of the liquid outlet one-way valve is provided with an inverted cone 1101 serving as a limiting structure, and the liquid outlet one-way valve 11 is arranged in a first channel 801 at the front end of the injection cavity 8. The liquid-drawing one-way valve 12 is umbrella-shaped, the tail part of the liquid-drawing one-way valve is provided with an inverted cone 1201 serving as a limiting structure, and the liquid-drawing one-way valve 12 is arranged in the second through hole 802 at the rear end of the injection cavity 8.

Preferably, the liquid outlet check valve 11 and the liquid suction check valve 12 are both made of elastic rubber or soft plastic.

Preferably, the driving means comprises a driving bevel gear 3 and a driven gear 4. The driving bevel gear 3 and the driven wheel 4 are meshed with each other, the top surface of the driven wheel 4 is provided with an eccentric ring 41, the eccentric ring 41 is sleeved with a waist-shaped ring 503 at one end of the plunger 5, the eccentric ring 41 is in sliding connection with the waist-shaped ring 503, the driven wheel 4 is provided with a central hole, and the central hole is connected with a shaft hole at a corresponding part of the shell 1 through a shaft 10.

Preferably, the electrical device comprises a direct current motor 2, a gear switch 13 and a battery compartment. The direct current motor 2 is connected with a battery box through a gear switch 13, the battery box provides a direct current power supply for the direct current motor 2, the gear switch 13 controls the start and stop and the rotation speed switching of the direct current motor 2, and a rotor of the direct current motor 2 is fixedly connected with the driving bevel gear 3.

Preferably, the front end of the housing 1 is provided with a spray tube, which is connected with the first insertion tube 701 and the second insertion tube 702 of the plug-in unit 7, and the spray tube comprises a scattering spray tube and a direct spray tube which are connected, and acts on the affected part.

The electric device provides power and control, and the driving device drives the reciprocating injection device to realize extraction and injection of flushing liquid, and has the characteristics of compact structure, simple and accurate transmission, stable flow and pressure, convenient use and high reliability.

The specific use is as follows:

When the gear switch 13 is started, the direct current motor 2 is powered on, the direct current motor 2 shaft drives the driving bevel gear 3 to rotate, the driving bevel gear 3 drives the driven gear 4 to rotate, the driven gear 4 converts rotary motion into linear reciprocating motion of the plunger 5 through the eccentric ring 41 and the waist-shaped ring 503 mechanism of the plunger 5, when the plunger 5 moves towards the direction close to the direct current motor 2, the space in the injection cavity 8 increases and the pressure decreases, the liquid suction check valve 12 is opened under the liquid pressure, the liquid outlet check valve 11 is closed under the maintenance of the atmospheric pressure and the self elastic pressure, and liquid flows into the injection cavity 8 through the liquid suction check valve 12 to store liquid.

When the plunger 5 moves away from the direct current motor 2, the plunger 5 pushes the liquid storage in the injection cavity 8 at the moment, the liquid storage presses the liquid pumping one-way valve 12 to be closed, the liquid outlet one-way valve 11 is opened under the pushing pressure of the liquid storage, so that the liquid storage is injected out of the liquid passing channel, and liquid flow is formed through the injection pipe, so that the plunger 5 alternately operates, flushing liquid is continuously pumped into the injection cavity 8 and then injected out of the injection cavity 8, and rapid cyclic flushing is realized.

More specifically:

1. The liquid outlet one-way valve 11 and the liquid suction one-way valve 12 are umbrella-shaped, and have smart structural design and stable and reliable action.

2. The liquid outlet one-way valve 11 and the liquid suction one-way valve 12 are both made of elastic rubber or soft plastic.

3. The injection cavity 8 and the plug connector 7 are transparent, the internal condition is clear and visible, and the observation and detection are convenient.

4. The liquid outlet one-way valve 11 and the liquid suction one-way valve 12 are umbrella-shaped, and the tail part is provided with an inverted cone shape as a limiting structure, so that the one-way valve is ensured to be fixed and sealed, the reset is reliable, and the liquid outlet quantity is ensured to be stable and reliable.

5. The plug 502 in the third channel 803 of the injection cavity 8 has a guiding function, so that the movement track of the plug 502 is stable, and the matching mechanism of the waist-shaped ring 503 and the eccentric ring 41 is simple, flexible, stable and reliable.

6. The eccentric ring 41 is designed into a hollow ring shape, so that the mass is reduced, the inertial interference is reduced, the movement is stable and efficient, the material is saved, and the cost is reduced on the premise of ensuring the strength and the function.

8. The direct current motor 2 adopts high rotating speed, and the injection device adopts stable and reliable short-stroke design, so that an optimized pumping, liquid storage and injection circulation mechanism with small liquid amount and high frequency is formed, high flow and speed are realized, pressure is high, the range is long, and a good flushing effect is achieved.

9. The electric control device consists of a battery pack, a gear switch 13, a direct current motor 2 and an electric wire, wherein the battery pack provides power, the gear switch 13 controls high-low gear conversion and start-stop, and when a half group of batteries are connected, the direct current motor 2 runs in a low speed and provides low flow, low flow speed, low pressure and near range; when the high-grade is connected, the motor rotates at a high speed and runs at a high grade, and high flow, high flow rate, high pressure and long range are provided; and stopping running when the gear is in the middle position.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, the meaning of "plurality" is two or more unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An injection type flusher, comprising:

A housing (1);

a reciprocating injection device installed inside the housing (1) for reciprocally pumping and injecting a rinsing liquid;

The reciprocating injection apparatus includes:

A plunger (5) comprising a cross bar (501), a plug (502) and a waist-shaped ring (503) which are integrally formed;

An injection cavity (8) having a first channel (801), a second channel (802) and a third channel (803) in communication with each other;

A plug connector (7) comprising a fixing plate (703), wherein the fixing plate (703) is fixedly connected with the shell (1), the fixing plate (703) is provided with a first through hole and a second through hole, a first insertion pipe (701) is fixed in the first through hole, a second insertion pipe (702) is fixed in the second through hole, and one end of the second insertion pipe (702) is inserted into the first channel (801) and communicated with the first through hole;

an liquid-suction check valve (12) mounted inside the second passage (802);

A liquid outlet check valve (11) installed inside the first passage (801);

Wherein the plug (502) is located inside the third channel (803) and is used for reciprocating in the third channel (803) so that the liquid suction one-way valve (12) is opened and closed, the liquid outlet one-way valve (11) is closed and opened, and then the flushing liquid enters the second channel (802) and is discharged from the first channel (801);

the end part of the second channel (802) is connected with a liquid suction pipe (9), and the second channel (802) and the liquid suction pipe (9) form a liquid suction channel;

one end of the first cannula (701) is connected with a liquid return pipe (6), and the first cannula (701) and the liquid return pipe (6) form a liquid return channel.

2. The injection type flusher of claim 1, wherein:

The tail part of the liquid outlet one-way valve (11) is in a first inverted cone shape (1101) or a waist drum shape or a sphere shape;

The tail part of the liquid suction one-way valve (12) is in a second inverted cone shape (1201) or a waist drum shape or a sphere shape.

3. The injection type flusher of claim 2, wherein:

The liquid outlet one-way valve (11) is umbrella-shaped, and the liquid pumping one-way valve (12) is umbrella-shaped.

4. An injection type flusher according to claim 1, further comprising a driving device installed inside the housing (1) and connected to the reciprocating injection device, the driving device comprising:

A drive bevel gear (3); and

A driven gear (4) which is meshed with the drive bevel gear (3), wherein a central hole is arranged in the middle of the driven gear (4), and the central hole is connected with the shell (1) through a shaft (10);

The top surface of the driven gear (4) is provided with an eccentric ring (41), and the eccentric ring (41) is in sliding connection with the waist-shaped ring (503).

5. The injection washer according to claim 4, characterized in that it further comprises electrical means, located inside and outside said housing (1), connected to said driving means, said electrical means comprising:

A DC motor (2);

a gear switch (13) connected to the DC motor (2); and

And the battery box is connected with the gear switch (13).

6. The injection type flusher of claim 5, wherein:

the rotor of the direct current motor (2) is fixedly connected with the driving bevel gear (3).

7. The injection type flusher of claim 1, wherein:

the first channel (801) is arranged coaxially with the second cannula (702).

8. The injection syringe of any one of claims 1-7, further comprising a jet pipe (14), the jet pipe (14) comprising:

A cap (142) connected to the housing (1) and having a cavity (141) and a third through hole (143), the cavity (141) communicating with the other end (705) of the first cannula (701);

a thick pipe (144), wherein a first end (145) of the thick pipe (144) and the third through hole (143) are integrally formed or separately formed; and

A thin tube (146) positioned inside the thick tube (144);

wherein, the first end (147) of the thin tube (146) is communicated with the other end (704) of the second cannula (702) to form a liquid outlet channel, and the second end (148) of the thin tube (146) is close to the affected part for spraying the flushing liquid;

the thick tube (144) forms a liquid return channel with the cavity (141) and the other end (705) of the first cannula (701), and the second end (149) of the thick tube (144) is close to the affected part for recycling the used flushing liquid.