CN215023634U

CN215023634U - Gastric lavage device for emergency department

Info

Publication number: CN215023634U
Application number: CN202120694958.0U
Authority: CN
Inventors: 翟雪琴; 翟炜; 韦睿
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-12-07
Anticipated expiration: 2031-04-06

Abstract

An emergency department gastric lavage device comprising: the liquid inlet pipe is used for conducting gastric lavage liquid medicine entering the stomach of a patient, the header pipe is entered from the oral cavity or the nasal cavity of the patient and enters the stomach of the patient through the esophagus, the waste liquid pipe is used for recovering waste liquid generated after gastric lavage, the liquid inlet pipe and the header pipe are connected with the waste liquid pipe through a three-way pipeline, one end of the header pipe, which is far away from and connected to the three-way pipeline, is connected with a rotary spray head, an annular rotating shaft coaxial with the header pipe is arranged at the connecting part, and the rotary spray head is connected to the rotating shaft, so that the rotary spray head can rotate along the axis of the header pipe under the driving of recoil force of liquid injection.

Description

Gastric lavage device for emergency department

Technical Field

The utility model relates to the field of medical emergency treatment equipment, in particular to a gastric lavage device for emergency department.

Background

At present, patients needing gastric lavage in emergency departments in medical institutions often eat toxic substances or drink the toxic substances by mistake, so that the stomach is stocked with a certain content of toxic substances. The gastric lavage refers to introducing gastric lavage fluid with certain components into the gastric cavity of a patient through a certain pipeline device, flushing and mixing the toxic substance-containing contents in the gastric cavity by the gastric lavage fluid, pumping the mixed liquid out of the body of the patient through a pipeline, and performing liquid inlet and liquid outlet operations for many times, so that the content of the toxic substance in the stomach of the patient can be well reduced, and the subsequent poisoning condition caused by the absorption of the toxic substance by the stomach of the patient is prevented. The tube device for guiding gastric lavage liquid and guiding mixed liquid is usually entered from nasal cavity or oral cavity of patient, and entered into stomach through esophagus, when the common gastric lavage device is placed in patient, patient usually swallows due to discomfort, at this time, the tube of gastric lavage device is compressed to reduce flow.

CN209332871U the utility model discloses a gastric lavage device of clinical usefulness of emergency internal medicine, including the stock solution bag, the bottom fixedly connected with drain pipe of stock solution bag, the mid-mounting of drain pipe has the flow stopping valve, the bottom of drain pipe and the upside mouth of pipe fixed connection of three-way pipe, the mouth of pipe fixedly connected with connecting pipe of three-way pipe downside, the mid-mounting of connecting pipe has the speed regulator, the bottom fixedly connected with stomach tube of connecting pipe, the right side mouth of pipe fixedly connected with liquid suction pipe of three-way pipe. The utility model discloses it is rational in infrastructure, can drive the magnetic block through removing powerful magnet and remove, the magnetic block can drive when removing left and promote the piece and remove left, because the left end of soft blade is fixed, can the soft blade of buckling when promoting the piece and remove, soft blade cuts the plug for the plug volume diminishes, makes things convenient for more to get into the liquid suction pipe, and whole device simple structure can not block up moreover, uses convenient safety more.

CN206603975U discloses a gastric lavage device for emergency treatment, which comprises a gastric lavage tube, wherein a partition plate for dividing the gastric lavage tube into two channels is arranged in the middle of the gastric lavage tube, the upper ends of the two channels are respectively connected with a liquid injection tube and a suction tube, the liquid injection tube is connected to a liquid injection box, the suction tube is connected to a negative pressure chamber through a negative pressure regulator, and a one-way valve which can only infuse from bottom to top is arranged in the channel connected with the suction tube; the utility model aims at providing a lavage device for first aid falls into two passageways with the lavage tube through the baffle, and one is connected to the transfer line, and one is connected to and attracts the pipe, and then can realize infusion and imbibition synchronous operation, very big improvement the efficiency of lavage, reduced the time of lavage, reduced patient's dangerous degree. The prior art mentioned above is all in consideration of preventing misoperation and realizing the arrangement of the remote control device by utilizing the existing doorplate of the medical facility and realizing other functions such as sound and light warning and the like on the basis of the arrangement.

CN211434440U discloses a gastric lavage device for emergency internal medicine clinic, which belongs to the technical field of gastric lavage devices, and comprises a full-automatic gastric lavage machine body, a first filter and a control panel, wherein the control panel is arranged on the full-automatic gastric lavage machine body, a storage cabinet is arranged on the inner side below the full-automatic gastric lavage machine body, a push-pull block is arranged on the outer side of the storage cabinet, the first filter is placed on the working table surface of the full-automatic gastric lavage machine body, a filtering device is arranged on the inner side of the first filter, and the filter is connected on the upper side of the first filter, so that the utility model solves the problems that the existing gastric lavage device can block a liquid extraction pipeline due to food in the gastric cavity or other objects with larger volume, the lavage liquid in the gastric cavity can not be extracted in time, the damage to the gastric cavity of a patient and the existing gastric lavage device can be extracted manually and repeatedly, the consumption of manpower and material resources is very serious.

However, the effect of the gastric lavage fluid nozzle in the rapid gastric lavage process in the gastric lavage process is considered by the inventor in the prior art, namely, the traditional shower nozzle similar to a shower nozzle is adopted by the prior art, the shower nozzle only has a flushing effect on a specific point of a patient, and the point of the patient which is flushed for a long time is not covered by other parts, so that discomfort can be caused by the point of the patient which is flushed for a long time.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor studied a lot of documents and patents when making the present invention, but the space did not list all details and contents in detail, however, this is by no means the present invention does not possess these prior art features, but on the contrary the present invention has possessed all features of the prior art, and the applicant reserves the right to increase the related prior art in the background art.

SUMMERY OF THE UTILITY MODEL

In order to solve at least some deficiencies among the above-mentioned prior art, the utility model provides a gastric lavage device of emergency department, it contains at least: the liquid inlet pipe is used for conducting gastric lavage liquid medicine entering the stomach of a patient, the header pipe is entered from the oral cavity or the nasal cavity of the patient and enters the stomach of the patient through the esophagus, the waste liquid pipe is used for recovering waste liquid generated after gastric lavage, the liquid inlet pipe and the header pipe are connected with the waste liquid pipe through a three-way pipeline, one end of the header pipe, which is far away from and connected to the three-way pipeline, is connected with a rotary spray head, an annular rotating shaft coaxial with the header pipe is arranged at the connecting part, and the rotary spray head is connected to the rotating shaft, so that the rotary spray head can rotate along the axis of the header pipe under the driving of recoil force of liquid injection.

Preferably, the rotary nozzle comprises a bending pipe and an outlet tray, the bending pipe comprises a first pipe section, a second pipe section and a third pipe section which are communicated and perpendicular to each other and are not coplanar, and the outlet tray is connected to a liquid outlet of the third pipe section.

Preferably, rotatory nozzle includes the pipe of bending, and the pipe of bending includes two UNICOMs and mutually perpendicular's first pipeline section and second pipeline section, and wherein, be provided with the several apopore on the second pipeline section near the one side in first direction positive direction.

Preferably, the rotary sprayer comprises a bent pipe, the bent pipe comprises a first pipe section and a plurality of second pipe sections which are communicated and perpendicular to each other, the plurality of second pipe sections are communicated with the same first pipe section, the flowing direction of liquid in each second pipe section is observed in the front-back direction, and a plurality of water outlet holes are formed in the same left side or right side of each second pipe section.

Preferably, the other end of the liquid inlet pipe, which is far away from the three-way pipeline, is connected to the liquid medicine storage tank, wherein a pressurizing mechanism is further arranged on the whole pipeline path of the liquid inlet pipe, and the pressurizing mechanism is configured into an elastic cavity communicated in the liquid inlet pipe path.

Preferably, a flow regulator and a water stop valve are also arranged in the liquid inlet pipe conduit path, wherein the water stop valve is located upstream of the flow regulator, viewed in the liquid flow direction, and the flow regulator is located upstream of the pressurizing mechanism.

Preferably, the peripheral side outer wall of the liquid medicine storage tank is provided with a double-layer structure, wherein the middle part clamped in the double-layer structure is provided with vacuum.

Preferably, the top of the liquid medicine storage tank is opened with an opening, a sealing cover is configured according to the shape and the size of the opening, and a sealing ring is arranged around the edge of the opening.

Preferably, a mouth supporting ring is arranged around the outer side of the three-way pipeline and protrudes towards the outer ring of the mouth supporting ring, so that the mouth supporting ring can be contacted with the inner wall of the oral cavity of the patient and can be supported.

Preferably, a one-way valve is arranged on the pipe wall of the main pipe close to the pipe wall connected to the rotary spray head, and the one-way valve is configured to only conduct liquid flowing into the main pipe from the outside.

The utility model discloses at least, have following advantage:

1. the utility model provides a loading system can provide extra supplementary pressurization when the circulation of the gastric lavage liquid is not smooth and easy for the liquid circulation is smooth and easy.

2. The utility model provides a double-deck heat preservation liquid medicine storage tank can keep the temperature of gastric lavage liquid medicine, prevents that colder gastric lavage liquid from causing patient's discomfort.

3. The utility model provides a rotatory nozzle can carry out the rotation in the water spray, can spray the liquid medicine to each anchor ring of stomach along the annular path, has promoted the gastric lavage effect and has also prevented that same position from being erodeed for a long time and leading to patient uncomfortable.

Drawings

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

FIG. 2 is a schematic structural view of the rotary sprinkler head of the present invention in the ZX plane;

FIG. 3 is a schematic structural view of the rotary nozzle of the present invention in the ZY plane;

FIG. 4 is a schematic view of another embodiment of the rotary nozzle of the present invention in the ZY plane;

in the figure: 100. a liquid medicine storage tank; 110. a liquid feeding pipeline; 120. a sealing cover; 200. a liquid inlet pipe; 210. a water stop valve; 220. a flow regulator; 230. a pressurizing mechanism; 300. a three-way pipeline; 310. a nozzle supporting ring; 400. a header pipe; 410. a one-way valve; 500. rotating the spray head; 510. a first tube section; 520. a second tube section; 530. a third tube section; 540. a water outlet tray; 550. a rotating shaft; 600. a waste liquid pipe; 610. a waste liquid valve; 700. waste liquid recovery unit.

Detailed Description

The following detailed description is made with reference to the accompanying drawings.

Fig. 1 shows a gastric lavage device for emergency department, which at least comprises a liquid medicine storage tank 100, a liquid inlet pipe 200, a liquid outlet pipe and a waste liquid storage tank, wherein the liquid medicine storage tank 100 is communicated with the liquid inlet pipe 200, the liquid medicine storage tank 100 is spatially positioned above the liquid inlet pipe 200, and the other end of the liquid inlet pipe 200, which is communicated to the liquid medicine storage tank 100, is connected to a three-way pipeline 300. The tee 300 has at least one inlet and two outlets, with the outlets being connected to a manifold 400, which manifold 400 is perpendicular to the ground only under the influence of gravity and is connected to a rotary spray head 500. The other inlet is connected to a waste tube 600 which is responsible for conducting away the waste liquid formed after gastric lavage. At least one pressurizing mechanism 230 is provided in the path of the tube between the liquid inlet tube 200 and the tee tube 300, and the pressurizing mechanism 230 is operated to increase the circulation of the gastric lavage liquid medicine in the tube and prevent the liquid from being blocked.

The utility model discloses a liquid medicine storage tank 100, this storage tank are used for storing or temporary storage gastric lavage liquid medicine, and it can set up to cylindrical or prismatic appearance structure in order to realize the storage to the gastric lavage liquid medicine usually. One of the portions of medical fluid tank 100 is connected to fluid inlet tube 200, and preferably, the connection is located at the bottom of medical fluid tank 100 or near the bottom of medical fluid tank 100 on the circumferential side thereof, in order to allow all of the gastric lavage medical fluid in medical fluid tank 100 to flow into fluid inlet tube 200 by gravity. The connection mode can adopt a movable connection mode with a water stop flange piece, and also can select a mode that the connection part of the liquid inlet pipe 200 and the liquid medicine storage tank 100 is integrally formed, so that the liquid medicine for gastric lavage can be ensured to smoothly flow from the liquid medicine storage tank 100 to the liquid inlet pipe 200 and can be prevented from extravasation. Preferably, the medical fluid storage tank 100 is made of hard plastic or soft plastic with low weight and low cost, and preferably, the peripheral outer wall of the medical fluid storage tank 100 can be set to be a double-layer heat preservation structure because the gastric lavage fluid with temperature lower than the temperature range acceptable by human body is prevented from entering the stomach of the patient to cause stimulation to the stomach of the patient and further influence the gastric lavage effect. The double-layer heat preservation structure sets the middle part of the double layer as a closed vacuum cavity, and due to the vacuum non-heat conduction property, the gastric lavage liquid stored in the liquid medicine storage tank 100 has better heat preservation, and the condition of temperature reduction caused by gradual heat dissipation in the long-time placing process of the gastric lavage liquid is prevented.

The liquid medicine storage tank 100 is integrally of a closed structure, and is connected with a liquid feeding pipeline 110 besides being connected to the liquid inlet pipe 200, the liquid feeding pipeline 110 can be arranged at the other end far away from one end of the liquid inlet pipe 200, and specifically, if the liquid inlet pipe 200 is arranged at the bottom of the liquid medicine storage tank 100, the liquid feeding pipeline 110 can be arranged at the top of the liquid medicine storage tank 100. The size of the filling pipe 110 may be set according to the size of an injection port of a conventional medical gastric lavage syringe, so that medical personnel can sleeve the gastric lavage syringe to the filling pipe 110 to perform the filling or suction operation in the medical liquid storage tank 100.

Preferably, to achieve a large volume of gastric lavage fluid filled into fluid reservoir 100 prior to gastric lavage, an opening may be provided in the top of fluid reservoir 100, the opening being sized to cover a substantial portion of the top of fluid reservoir 100 to achieve a maximum caliber fill channel. Meanwhile, in order to realize the gastric lavage syringe using the charging tube 110 for suction operation, the sealing cover 120 is provided in a manner matching the size of the opening, and accordingly, the edge of the opening may be provided with a surrounding sealing ring, and the sealing cover 120 is combined with the opening with the sealing ring to form a relatively closed structure, so that the liquid medicine storage tank 100 forms an airtight sealed space therein under the condition of being closed by the sealing cover 120.

Preferably, in order to adjust the flow rate of the gastric lavage liquid medicine in the liquid inlet pipe 200, a flow regulator 220 is disposed at the middle section of the liquid inlet pipe 200, and the flow regulator 220 may be a medical commonly used flow regulator 220 for infusion, that is, the flow rate of the gastric lavage liquid medicine entering is adjusted by applying a certain pressure to the soft liquid inlet pipe 200 to reduce the pipe diameter thereof.

Preferably, in order to cut off the circulation of the gastric lavage liquid medicine in the liquid inlet pipe 200, a water stop valve 210 is further disposed in the liquid inlet pipe 200, wherein the sequence of the water stop valve 210 and the flow regulator 220 can be arbitrarily set as viewed along the flow direction of the gastric lavage liquid medicine in the water inlet pipe, and preferably the water stop valve 210 is disposed upstream of the flow regulator 220.

Preferably, in order to prevent the slow flow rate or blockage of the liquid inlet tube 200 caused by the pressure in the mouth or body of the patient, a pressurizing mechanism 230 is further disposed in the section of the liquid inlet tube 200, the pressurizing mechanism 230 is designed to be an elastic cavity, and the elastic cavity is communicated with the passage of the liquid inlet tube 200 so that the gastric lavage liquid medicine can flow into the elastic cavity and flow into the liquid inlet tube 200 of the next section from the communication position of the elastic cavity and the other side of the liquid inlet tube 200. The pressurizing mechanism 230 adopts the elastic cavity, so that medical personnel can repeatedly pinch the elastic cavity by hands to generate auxiliary pressure in the liquid inlet pipe 200 to enable the flow rate of the gastric lavage liquid medicine to be fast or restore the smoothness of the liquid inlet pipe 200 under the condition that the flow rate of the gastric lavage liquid medicine is slow or the gastric lavage liquid medicine is blocked. Preferably, the pressurizing mechanism 230 is disposed downstream of the flow regulator 220, as viewed in the direction of flow of the gastric lavage fluid.

The other outlet of the liquid inlet pipe 200, which is connected to the liquid medicine tank 100, is connected to a tee pipe 300, the tee pipe 300 having at least an inlet, a first outlet and a second outlet, wherein the other end of the liquid inlet pipe 200 is connected to the inlet of the tee pipe 300. The first outlet of the tee tube 300 is connected to a manifold 400, which manifold 400 is used to access the patient's esophagus from the patient's nasal or oral cavity and into the patient's stomach via the esophagus, so the diameter of the manifold 400 is sized to fit within the smallest dimension of the average person's nasal, oral, and esophageal path.

Preferably, to prevent the patient from biting into the tube and causing the fluid to flow poorly when the manifold 400 is used to access the esophagus from the patient's mouth, a mouth ring 310 is provided on the tee tube 300, the mouth ring 310 surrounding the outside surface of the tee tube 300 and projecting outwardly. Preferably, the outward projection of the mouth ring 310 is set to the maximum extent that the interior of the mouth of a typical person can expand, typically to slightly less than the maximum value noted above.

The other end of the manifold 400, which is far away from the first outlet, is connected to a rotary spray head 500, and the rotary spray head 500 drives itself to rotate along the axis of the manifold 400 by using the recoil force caused by the liquid spraying so as to spray the gastric lavage liquid medicine to all annular directions of the stomach of the patient in a rotary spraying manner. Specifically, the rotary nozzle 500 includes a bending tube and an outlet tray 540, wherein an inlet of the bending tube is connected to the main tube 400, and an outlet of the bending tube is connected to the outlet tray 540. The bending pipe is of a three-folding structure, and can be split into three communicated first pipe sections 510, second pipe sections 520 and third pipe sections 530 which are perpendicular to each other and are not coplanar. The first tube segments 510 are in coaxial communication with the manifold 400 as viewed along the axes shown in fig. 2 and 3, i.e., the first tube segments 510 are oriented parallel to the Z-axis. The second tube section 520 and the first tube section 510 form an L-shaped bent structure, i.e. the direction of the second tube section 520 is parallel to the Y-axis direction. The third tube section 530 and the second tube section 520 form an L-shaped bent structure but the axis of the L-shaped bent structure is not coplanar with the axis of the first tube section 510, i.e., the third tube section 530 is parallel to the X-axis. The outlet tray 540 is connected to the outlet of the third tube section 530. A rotating shaft 550 is provided at the joint of the bending pipe and the main pipe 400, the rotating shaft 550 is in a circular ring shape, the circular ring surface of the rotating shaft is connected to the outer edge of the bending pipe except the liquid passage portion, and the other side of the rotating shaft 550 is connected to the main pipe 400. The above arrangement allows the bending pipe to rotate about the axis of the header pipe 400.

Preferably, the bending pipe may only be provided with a first pipe section 510 and a second pipe section 520 (shown in fig. 4) in an L-shape, wherein a plurality of water outlet holes are formed on one surface of the second pipe section 520 along the positive axis direction of the X axis, and this design can also achieve the effect of driving the rotary nozzle 500 to rotate by the liquid spraying. Preferably, the second pipe section 520 may be provided as a plurality of second pipe sections 520 vertically spaced apart from the plane of the first pipe section 510 by a certain angle, the plurality of second pipe sections 520 collectively supply water using the same first pipe section 510, wherein the plurality of second pipe sections 520 have water outlet holes opened in the same left or right side as viewed in the direction of flow of the internal liquid, which arrangement may increase the water outlet positions and increase the time for which a certain portion is covered with the gastric lavage liquid.

The second outlet of the three-way pipe 300 is connected to the waste liquid pipe 600, the other end of the waste liquid pipe 600 is connected to the waste liquid recovery device 700, after the medical staff completes the gastric lavage operation, the water stop valve 210 is closed, the waste liquid valve 610 located on the waste liquid pipe 600 is opened, the water pump in the waste liquid recovery device 700 is started, and the waste liquid in the stomach of the patient is pumped out by the waste liquid pipe 600 and stored in the waste liquid tank inside the waste liquid recovery device. The waste liquid valve 610 is used to open the waste liquid introduced into the waste liquid recovery device 700 after completion of the gastric lavage by allowing the liquid to flow through the waste liquid tube 600 in a closed manner.

Preferably, a one-way valve 410 is disposed on a wall of the main tube 400 near the side of the rotatable nozzle 500, and the valve is configured to allow the fluid to flow from the inside of the main tube 400 to the outside but not from the inside of the main tube 400 to the outside, so that the design provides an additional passage for the waste fluid to flow back into the main tube 400 when the medical staff starts the waste fluid recycling operation, and the fluid flow is better and the flow is smoother than the rotatable nozzle 500 with the L-shaped bend.

It should be noted that the above-mentioned embodiments are exemplary, and those skilled in the art can devise various solutions in light of the present disclosure, which are also within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present specification and drawings are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. An emergency department gastric lavage device comprising:

a liquid inlet pipe (200) for conducting the gastric lavage liquid medicine entering the stomach of the patient,

a common duct (400) which enters from the patient's mouth or nasal cavity, passes through the esophagus into the patient's stomach,

a waste liquid tube (600) for recovering waste liquid generated after gastric lavage,

it is characterized in that the preparation method is characterized in that,

the liquid inlet pipe (200), the main pipe (400) and the waste liquid pipe (600) are connected through a three-way pipe (300), one end, far away from the three-way pipe (300), of the main pipe (400) is connected with a rotary spray head (500), an annular rotary shaft (550) coaxial with the main pipe (400) is arranged at the connecting part of the main pipe (400), and the rotary spray head (500) is connected to the rotary shaft (550), so that the rotary spray head (500) can rotate along the axis of the main pipe (400) under the driving of recoil force of liquid injection.

2. The gastric lavage device according to claim 1, characterized in that the rotary jet head (500) comprises a bent tube and an outlet tray (540), the bent tube comprises three communicated first tube segment (510), second tube segment (520) and third tube segment (530) which are mutually perpendicular and non-coplanar, and the outlet tray (540) is connected to an outlet of the third tube segment (530).

3. The gastric lavage device according to claim 1, characterized in that the rotary nozzle (500) comprises a bent pipe, the bent pipe comprises a first pipe section (510) and a second pipe section (520) which are communicated and perpendicular to each other, wherein a plurality of water outlet holes are arranged on one side of the second pipe section (520) near the positive direction of the first direction.

4. The gastric lavage device according to claim 1, characterized in that the rotary jet head (500) comprises a bent tube, the bent tube comprises a first tube segment (510) and a plurality of second tube segments (520) which are communicated and perpendicular to each other, wherein the plurality of second tube segments (520) are communicated with the same first tube segment (510), and each second tube segment (520) is provided with a plurality of water outlet holes on the same left side or right side as viewed in the front-back direction of the flow direction of the liquid in each second tube segment (520).

5. The gastric lavage device according to claim 1, characterized in that the other end of the liquid inlet tube (200) remote from the connection to the three-way tube (300) is connected to a liquid medicine tank (100), wherein a pressurizing mechanism (230) is further provided throughout the tube path of the liquid inlet tube (200), the pressurizing mechanism (230) being configured as an elastic cavity communicating in the path of the liquid inlet tube (200).

6. The gastric lavage device according to claim 5, characterized in that a flow regulator (220) and a water stop valve (210) are further provided in the liquid inlet tube (200) conduit path, wherein the water stop valve (210) is located upstream of the flow regulator (220) as seen in the liquid flow direction, and the flow regulator (220) is located upstream of the pressurizing mechanism (230).

7. The gastric lavage device according to claim 5, wherein the peripheral side outer wall of the liquid medicine tank (100) is provided as a double-layered structure, wherein a middle portion sandwiched by the double-layered structure is provided as a vacuum.

8. The gastric lavage device according to claim 5, wherein the top of the medical solution tank (100) is opened, a sealing cover (120) is arranged according to the shape and size of the opening, and a sealing ring is arranged around the edge of the opening.

9. The gastric lavage device according to claim 1, characterized in that a mouth support ring (310) is provided around the outside of the tee tube (300), the mouth support ring (310) is annularly projected outward so that the mouth support ring (310) can contact and support the inner wall of the patient's oral cavity.

10. The gastric lavage device according to claim 1, characterized in that a one-way valve (410) is provided on the wall of the manifold (400) near the connection to the rotatory nozzle tip (500), the one-way valve (410) being configured to conduct only liquid flowing from the outside into the manifold (400).