CN214201511U

CN214201511U - Reagent kit

Info

Publication number: CN214201511U
Application number: CN202022717725.6U
Authority: CN
Inventors: 郝书顺; 眭彦军; 陈立柱; 邢士元; 姚召辉
Original assignee: Shijiazhuang Hipro Biotechnology Co Ltd
Current assignee: Shijiazhuang Hipro Biotechnology Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-09-14
Anticipated expiration: 2030-11-23

Abstract

The utility model relates to a kit, which comprises a box body, an air inlet, a liquid outlet and a liquid storage tank, wherein the air inlet and the liquid outlet are arranged on the side part of the box body; one end of the liquid storage tank is communicated with the air inlet through the long and thin flow passage, the other end of the liquid storage tank is communicated with the liquid outlet, the air inlet is communicated with the air inlet interface, and the liquid outlet is communicated with the liquid outlet device. The utility model discloses compact structure, it is stable to go out the liquid, is fit for the automation and gets liquid.

Description

Reagent kit

Technical Field

The utility model relates to a kit.

Background

The kit is a common laboratory product and is used for storing reaction reagents. At present, reagents used by laboratories and detection instruments are all extracted from a kit by adopting a liquid transfer device or an injector, a suction head of the liquid transfer device needs to be replaced when different reagents are extracted, or the injector and a needle head need to be cleaned, so that the operation is complex, the time is wasted, the extraction amount is easily influenced by an operation method of an operator, and the reagent is not beneficial to being converted into an automatic instrument for operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compact structure is fit for the automatic kit of getting liquid.

The utility model adopts the following technical scheme:

a kit comprises a box body, an air inlet, a liquid outlet and a liquid storage tank, wherein the air inlet and the liquid outlet are arranged on the side part of the box body; one end of the liquid storage tank is communicated with the air inlet through the long and thin flow passage, the other end of the liquid storage tank is communicated with the liquid outlet, the air inlet is communicated with the air inlet interface, and the liquid outlet is communicated with the liquid outlet device.

Furthermore, the elongated flow channel comprises a first flow channel and a fourth flow channel which are arranged on the lower bottom surface of the box body, and a second flow channel and a third flow channel which are arranged on the upper top surface of the box body, and the first flow channel, the second flow channel, the third flow channel and the fourth flow channel are communicated in sequence; a gas-liquid isolating trap is arranged between the liquid storage tank and the elongated flow channel;

the gas-liquid isolation trap comprises a first trap groove and a second trap groove, the first trap groove is arranged between a third flow channel and a fourth flow channel, the second trap groove is arranged between the fourth flow channel and a liquid storage groove, a first gas column is arranged in the first trap groove, a second gas column is arranged in the second trap groove, the third flow channel is communicated with the first trap groove through the first gas column, and the fourth flow channel is communicated with the second trap groove through the second gas column.

Further, the interface of admitting air includes the connecting pipe and the shutoff pipe of setting at the connecting pipe other end of admitting air with the air inlet intercommunication, interference fit is provided with the air cock stopper in the shutoff pipe, the air cock stopper is provided with the blind hole that admits air along the axis, the open end orientation of the blind hole that admits air connecting pipe.

Furthermore, the air inlet blind hole comprises a frustum-shaped air inlet hole and a cylindrical air inlet hole which are communicated with each other, the cylindrical air inlet hole is provided with a blind end, the small bottom end of the frustum-shaped air inlet hole is connected with the cylindrical air inlet hole, and the large bottom end of the frustum-shaped air inlet hole is an open end.

Further, the liquid outlet device comprises a spray pipe connected with the liquid outlet and a nozzle arranged at the end part of the spray pipe;

the spray pipe comprises a spray pipe main body, spray holes and magnet rods, wherein the spray holes are formed in the spray pipe main body in the axial direction, the magnet rods are arranged in the spray holes, a plurality of baffle bars are uniformly arranged on the inner wall of each spray hole in the axial direction of each spray hole, one end of each baffle bar is provided with a shoulder extending towards the center of each spray hole, and the magnet rods move in the axial direction of the spray holes in a space enclosed by the shoulders and the baffle bars.

Furthermore, the nozzle comprises an annular sleeve, an end plate arranged at one end of the annular sleeve, a nozzle pipe arranged at the center of the end plate and a conical nozzle arranged at the end part of the nozzle pipe, wherein an annular retaining edge surrounding the periphery of the nozzle pipe is also arranged on the end plate, liquid channels communicated with the inside of the annular sleeve are arranged in the nozzle pipe and the conical nozzle, and an annular groove is formed between the nozzle pipe and the annular retaining edge in a surrounding manner;

the annular sleeve is in threaded connection or clamped connection with the nozzle body.

Further, a sealing valve is arranged in the annular sleeve; the sealing valve comprises a sealing valve main body and a cylindrical valve hole arranged on the sealing valve main body, wherein a frustum hole is formed in the bottom end of the valve hole, the frustum hole and the valve hole are coaxially arranged, and one end of the small bottom of the frustum hole is communicated with the bottom end of the valve hole; the valve hole is communicated with the spray hole, and the frustum hole is communicated with the liquid channel.

Further, the nozzle pipe is provided with sealed lid outward, sealed lid includes sealed lid body and sets up the sealed hole of nozzle that has the cecum on sealed lid body, the periphery in sealed hole of nozzle is provided with annular seal groove, the lateral wall of annular seal groove is provided with the annular seal boss to the extension in the inslot, sealed hole of nozzle and nozzle pipe and toper spout looks adaptation, annular seal groove and annular shelves limit looks adaptation.

The beneficial effects of the utility model reside in that, the utility model discloses a compact structure, reasonable goes out the liquid stability, is applicable to the instrument and automizes and gets liquid.

Drawings

FIG. 1 is a schematic view of the structure of the upper top surface of the kit.

FIG. 2 is a schematic view of the structure of the bottom surface of the reagent cartridge.

Fig. 3 is a schematic structural diagram of the air inlet interface.

Fig. 4 is a schematic structural view of the liquid outlet device.

Fig. 5 is a schematic structural view of the sealing cover.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention.

As shown in fig. 1 and 2, a kit comprises a box body 1-1, an air inlet 1-2 arranged at the side of the box body 1-1, a liquid outlet 1-3 and a liquid storage tank 1-4 arranged on the box body 1-1; one end of the liquid storage tank 1-4 is communicated with the air inlet 1-2 through the long and thin flow passage, the other end of the liquid storage tank 1-4 is communicated with the liquid outlet 1-3, the air inlet 1-2 is communicated with the air inlet interface, and the liquid outlet 1-3 is communicated with the liquid outlet device.

The elongated flow channel comprises a first flow channel 1-5 and a fourth flow channel 1-6 which are arranged on the lower bottom surface of the box body 1-1, and a second flow channel 1-7 and a third flow channel 1-8 which are arranged on the upper top surface of the box body 1-1, wherein the first flow channel 1-5, the second flow channel 1-7, the third flow channel 1-8 and the fourth flow channel 1-6 are communicated in sequence. The first flow channel 1-5, the second flow channel 1-7 and the third flow channel 1-8 are all folded flow channels, and particularly, the first flow channel, the second flow channel and the third flow channel can be in an S shape in an end-to-end connection mode. After the gas flows through the long and thin flow channel, the gas flows in a direction changing repeatedly, the time that the gas reaches the liquid storage tank can be prolonged, and the pressure of the liquid storage tank is ensured to be uniform and stable, so that the liquid outlet is stable, and the problem of unstable liquid outlet flow caused by unstable pressure of the gas input by the gas inlet is solved.

A gas-liquid isolating trap is arranged between the liquid storage tank 1-4 and the elongated flow channel; the gas-liquid isolation trap comprises a first trap tank 1-9 arranged between a third flow channel 1-8 and a fourth flow channel 1-6 and a second trap tank 1-10 arranged between the fourth flow channel 1-6 and a liquid storage tank 1-4, wherein a first gas column 1-11 is arranged in the first trap tank 1-9, a second gas column 1-12 is arranged in the second trap tank 1-10, the third flow channel 1-8 is communicated with the first trap tank 1-9 through the first gas column 1-11, and the fourth flow channel 1-6 is communicated with the second trap tank 1-10 through the second gas column 1-12. Once the reagent in the liquid storage tank flows back to the elongated flow channel, the reagent is firstly filled into the second trap tank through the fourth flow channel, at the moment, the second air column is higher than the bottom surface of the second trap tank, the liquid level in the second trap tank reaches the top opening of the air column only after reaching a certain height, and then flows back to the third flow channel, the first trap tank is communicated with the third flow channel, as mentioned above, the liquid level needs to exceed the first air column to continue flowing back forward, and therefore the gas-liquid isolation trap can avoid liquid flowing back to the air inlet.

The box body 1-1 is provided with an air inlet bin 1-13 communicated with the air inlet 1-2, and the air inlet bin 1-13 is communicated with a first flow passage 1-5 through an air storage bin 1-14 arranged on the lower bottom surface of the box body 1-1. The air enters the air inlet bin from the air inlet and then enters the elongated flow channel through the air storage bin, and the air inlet bin and the air storage bin play a role in equalizing pressure for the first time.

The first flow channel 1-5 is communicated with the second flow channel 1-7 through an overflow groove 1-15 arranged on the lower bottom surface of the box body 1-1. The overflow trough also serves to further prevent the liquid reagent from continuing to flow backwards.

The overflow groove 1-15 is communicated with the second flow channel 1-7 through a third trap groove 1-16 arranged on the upper top surface of the box body 1-1, a third air column 1-17 is arranged in the third trap groove 1-16, and the overflow groove 1-15 is communicated with the third trap groove 1-16 through the third air column 1-17. The third trap here has the same function as the first and second traps described above.

The second flow channel 1-7 is communicated with the third flow channel 1-8 through a sponge groove 1-18 arranged on the upper top surface of the box body 1-1, and a water-absorbing sponge is arranged in the sponge groove 1-18. The sponge that absorbs water can filter gas, and simultaneously, when liquid reagent inhales the sponge groove backward, the sponge that absorbs water can absorb liquid reagent, improves anti-reflux effect.

The second trap tank 1-10 is communicated with a liquid storage tank 1-4 through a connecting flow channel 1-19. The connecting flow channel can improve the difficulty of liquid suck-back on one hand, and can further play a role in gas pressure equalization on the other hand.

For the reagent kit shown in fig. 1 and 2, two liquid storage tanks are provided, which are respectively connected with the gas storage bin through the same structure, and the gas enters the gas storage bin from the gas inlet through the gas inlet bin, is divided into two parts and respectively enters the respective flow channels. The gas firstly enters the overflow groove from the first flow channel, the overflow groove can be a plurality of continuous overflow grooves, and the gas enters the third trap groove through the third gas column after passing through the continuous overflow groove. And the gas continuously moves forwards from the third trap groove, enters the sponge groove through the second flow channel, and then enters the third flow channel through the sponge groove, and the third flow channel is communicated with the first gas column to introduce the gas into the first trap groove. And the gas is introduced into the second gas column from the first trap tank through the fourth flow channel, enters the second trap tank and is finally communicated with the liquid storage tank through the connecting flow channel.

Certainly, the reservoir also can be a plurality of, is connected with the gas storage bin through the same structure respectively, and the long and thin runner and the gas-liquid are kept apart the emergence of trap and are effectively avoided refluxing in setting up, even if take place the backward flow, multiple reagent also is difficult to the intermix, realizes the effect that multiple reagent was stored to a kit.

The utility model discloses an each runner and compartment are all separated through setting up the baffle in the box body inside, go up the top surface or the bottom surface down and form, are forming through covering the plastic envelope membrane on the baffle, because the volume of reservoir is great, can be with plastic envelope membrane jack-up and swell when filling into liquid, therefore be provided with backup pad 1-20 in the reservoir, the top and the plastic envelope membrane of backup pad are fixed.

As shown in fig. 3, the air inlet connector includes an air inlet connecting pipe 2-1 and a blocking pipe 2-2 disposed at one end of the air inlet connecting pipe 2-1, an air faucet plug 2-3 is disposed in the blocking pipe 2-2 in an interference fit manner, the air faucet plug 2-3 is provided with an air inlet blind hole along an axis, and an open end of the air inlet blind hole faces the air inlet connecting pipe 2-1.

The air inlet connecting pipe 2-1 and the plugging pipe 2-2 are annular pipes, and the air faucet plug 2-3 is a cylinder. And a sealing boss 2-4 is arranged on the outer side wall of the air faucet plug 2-3 along the circumferential direction. The number of the sealing bosses 2-4 is two.

The air inlet pipe is communicated with the air inlet 1-2 of the box body 1-1, and the plugging pipe is plugged by the air tap plug to block the air inlet pipe from being communicated with the outside. When in use, the air needle pierces the air cock plug to communicate the air inlet with the air inlet connecting pipe. The sealing boss extrudes the inner side wall of the plugging pipe outwards to realize sealing.

The air inlet blind hole comprises frustum-shaped air inlet holes 2-5 and cylindrical air inlet holes 2-6 which are communicated with each other, the cylindrical air inlet holes 2-6 are provided with blind ends, the small bottom ends of the frustum-shaped air inlet holes 2-5 are connected with the cylindrical air inlet holes 2-6, and the large bottom ends of the frustum-shaped air inlet holes 2-5 are open ends. The diameter of the small bottom end of the frustum-shaped air inlet hole 2-5 is equal to that of the cylindrical air inlet hole 2-6.

When the air needle punctures, the pointed end of air needle pierces the middle part of air cock stopper, and the air needle passes behind the blind end of cylindrical inlet port, gets into the connecting pipe that admits air by cylindrical inlet port and frustum shape inlet port, accomplishes the intercommunication of admitting air and kit air inlet. The air inlet blind hole enables the middle thickness of the air faucet plug to be thin, and the needle head of the air needle can be easily punctured into the air faucet plug. The cylindrical air inlet hole is convenient to position during puncturing, the opening of the frustum-shaped air inlet hole is large, and the phenomenon that the air needle head is inserted into the side wall of the air inlet blind hole due to the fact that the air needle head is rocked left and right in the puncturing process is avoided, so that the air needle is blocked. It should be noted that the outer circumferential portion of the air faucet plug cannot be thinned, which deteriorates the sealing performance thereof.

As shown in fig. 4, the liquid outlet device comprises a spray pipe and a nozzle arranged at the end of the spray pipe.

The spray pipe comprises a spray pipe main body 3-1, a spray hole 3-2 arranged along the axial direction of the spray pipe main body 3-1 and a magnet rod 3-3 arranged in the spray hole 3-2, wherein a plurality of baffle strips 3-4 along the axial direction of the spray hole 3-2 are uniformly arranged on the inner wall of the spray hole 3-2, one end of each baffle strip 3-4 is provided with a shoulder 3-5 extending towards the center of the spray hole 3-2, and the magnet rod 3-3 moves along the axial direction of the spray hole 3-2 in a space enclosed by the shoulder 3-5 and the baffle strips 3-4.

The spray pipe main body is fixedly connected with the reagent kit, and spray holes in the spray pipe main body are communicated with liquid outlet holes 1-3 of the reagent kit box body 1-1. One end of the spray pipe main body 3-1 where the shoulder 3-5 is located is a liquid inlet end, and liquid reagent in the reagent box flows into the spray hole of the spray pipe main body from the liquid inlet end.

The inner diameter of the circular section enclosed by the shoulders 3-5 is smaller than the outer diameter of the section of the magnet rod 3-3, and the inner diameter of the circular section enclosed by the stop bars 3-4 is larger than the outer diameter of the section of the magnet rod 3-3. The shoulder can block the magnet stick and remove to the play liquid hole of kit to prevent magnet stick shutoff liquid outlet. An air groove is formed between the adjacent baffle bars, and the liquid reagent can flow in the spray holes through the air groove without being influenced by the magnetic iron rod.

As shown in FIG. 4, the nozzle comprises an annular sleeve 4-1, an end plate 4-2 arranged at one end of the annular sleeve 4-1, a nozzle pipe 4-3 arranged at the center of the end plate 4-2, and a conical nozzle 4-4 arranged at the end of the nozzle pipe 4-3, wherein an annular flange 4-5 surrounding the periphery of the nozzle pipe 4-3 is further arranged on the end plate 4-2, a liquid passage 4-6 communicated with the inside of the annular sleeve 2-1 is arranged in the nozzle pipe 2-3 and the conical nozzle 2-4, and an annular groove 4-7 is formed between the nozzle pipe 4-3 and the annular flange 4-5 in a surrounding manner.

The conical nozzle of the nozzle is designed to be conical, so that liquid is prevented from hanging and dripping. The nozzle pipe 4-3 is frustum-shaped or cylindrical, the outer side of the nozzle pipe is provided with an annular flange and an annular groove, the slender nozzle pipe is prevented from being damaged by external force, and the groove can also clamp the sealing cover when the sealing cover is installed, so that the sealing cover is not easy to fall off.

The annular sleeve 4-1 is clamped with the nozzle main body 3-1. Specifically, the outer side of the other end, opposite to the shoulder 3-5, of the nozzle body 3-1 is provided with a connecting ring 3-7, the outer side of the connecting ring 3-7 is provided with an annular boss 3-8, and the opening end of the annular sleeve 4-1 is provided with an annular groove 4-8 matched with the annular boss 3-8. The nozzle is matched with the annular boss on the spray pipe main body, and the connecting annular table is inserted into the annular sleeve, so that the installation is convenient and direct, and the falling is not easy. The liquid reagent is sprayed out from a liquid channel in the nozzle after passing through a liquid outlet and a spray pipe of the kit.

A sealing valve is arranged in the annular sleeve 4-1. The sealing valve comprises a sealing valve main body 5-1 and a cylindrical valve hole 5-2 arranged on the sealing valve main body 5-1, wherein a frustum hole 5-3 is arranged at the bottom end of the valve hole 5-2, the frustum hole 5-3 and the valve hole 5-2 are coaxially arranged, and one end of the small bottom of the frustum hole 5-3 is communicated with the bottom end of the valve hole 5-2. The sealing valve body 5-1 is a cylinder made of an elastic sealing material, such as rubber, preferably silica gel.

The sealing valve is placed in the direction that one side of the small bottom of the conical hole is close to the spray pipe, one side of the large bottom of the conical hole is close to the nozzle, and the sealing valve body is in interference fit with the annular sleeve to realize sealing and prevent liquid from leaking from a gap. The valve hole communicates the nozzle hole of the nozzle and the liquid channel of the nozzle. The connecting end of the spray pipe main body and the annular sleeve is not provided with a shoulder, and the magnet rod can be abutted against the sealing valve. The sealing valve is made of silica gel material and has elasticity, and after being extruded by the magnet rod, the valve hole is blocked to achieve the sealing effect, so that the liquid reagent is blocked from entering the nozzle, and the effect of stopping liquid discharge is achieved.

The conical hole in the sealing valve can store a part of liquid reagent to wet the nozzle, so that the liquid at the conical nozzle is prevented from being quickly volatilized and crystallized to block the nozzle.

The magnet rod 3-3 is cylindrical. The number of the baffle strips 3-4 is more than three, the baffle strips are uniformly distributed on the inner wall of the spray hole, and the number of the baffle strips is preferably 6. Too few (one or two) of shelves can lead to the magnet stick to paste on the orifice inner wall in the motion process, and too much can lead to the air duct between adjacent shelves narrow excessively, all can cause the flow resistance to grow.

In order to realize the movement of the magnet rod in the spray hole, an electromagnet can be sleeved outside the liquid inlet end of the spray pipe main body, a permanent magnet ring is sleeved outside the connecting ring table of the spray pipe main body, the permanent magnet ring and the magnet rod have opposite polarities, the magnet rod is attracted to plug the spray nozzle, and liquid outlet is stopped. When liquid needs to be discharged, the electromagnet is electrified, the magnetic force of the electromagnet is larger than that of the permanent magnet ring, the magnet rod is attracted to the liquid inlet end, the shoulder abuts against the magnet rod, and the liquid reagent enters the nozzle through the air groove and then is discharged.

As shown in fig. 5, a sealing cover is cooperatively arranged on the outer side of the nozzle, and the sealing cover comprises a sealing cover body 6-1 and a nozzle sealing hole with a blind end, which is arranged on the sealing cover body 6-1, an annular sealing groove 6-2 is arranged on the periphery of the nozzle sealing hole, and an annular sealing boss 6-3 extending into the groove is arranged on the side wall of the annular sealing groove 6-2. The nozzle seal hole is located at the center of the annular seal groove 6-2.

The nozzle sealing hole comprises a connecting hole 6-4 and a blind end hole 6-5. The blind end hole 6-5 is in a frustum shape. The connecting hole 6-4 is cylindrical. The sealing cover body 6-1 is cylindrical. The seal cap is made of an elastomeric sealing material, such as rubber. Preferably, the sealing cover is integrally formed by silica gel materials.

When the nozzle is combined with the sealing cover to realize sealing, the cylindrical connecting hole 6-4 is matched with the cylindrical nozzle pipe 4-3, and the frustum-shaped blind end hole is matched with the conical nozzle 4-4 to realize the sealing connection of the nozzle. The annular sealing groove is matched with the annular flange, and the annular sealing boss in the annular sealing groove compresses the annular flange. The sealed lid forms double seal protection to the spout of nozzle and the annular shelves limit of nozzle, is difficult for the weeping, in addition, the annular seal boss in the annular seal groove extrudees the interference with the annular shelves limit of nozzle, has both guaranteed the leakproofness, makes sealed lid difficult for droing again.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A kit is characterized by comprising a box body (1-1), an air inlet (1-2) arranged at the side part of the box body (1-1), a liquid outlet (1-3) and a liquid storage tank (1-4) arranged on the box body (1-1); one end of the liquid storage tank (1-4) is communicated with the air inlet (1-2) through the long and thin flow channel, the other end of the liquid storage tank (1-4) is communicated with the liquid outlet (1-3), the air inlet (1-2) is communicated with the air inlet interface, and the liquid outlet (1-3) is communicated with the liquid outlet device.

2. A kit according to claim 1, wherein the elongated flow paths comprise a first flow path (1-5) and a fourth flow path (1-6) arranged on the lower bottom surface of the case body (1-1) and a second flow path (1-7) and a third flow path (1-8) arranged on the upper top surface of the case body (1-1), and the first flow path (1-5), the second flow path (1-7), the third flow path (1-8) and the fourth flow path (1-6) are communicated in sequence; a gas-liquid isolating trap is arranged between the liquid storage tank (1-4) and the elongated flow channel;

the gas-liquid isolation trap comprises a first trap tank (1-9) arranged between a third flow channel (1-8) and a fourth flow channel (1-6) and a second trap tank (1-10) arranged between the fourth flow channel (1-6) and a liquid storage tank (1-4), a first gas column (1-11) is arranged in the first trap tank (1-9), a second gas column (1-12) is arranged in the second trap tank (1-10), the third flow channel (1-8) is communicated with the first trap tank (1-9) through the first gas column (1-11), and the fourth flow channel (1-6) is communicated with the second trap tank (1-10) through the second gas column (1-12).

3. A kit according to claim 1, wherein the air inlet interface comprises an air inlet connecting pipe (2-1) communicated with the air inlet (1-2) and a blocking pipe (2-2) arranged at the other end of the air inlet connecting pipe (2-1), the blocking pipe (2-2) is internally provided with an air tap plug (2-3) in an interference fit manner, the air tap plug (2-3) is provided with an air inlet blind hole along the axis, and the open end of the air inlet blind hole faces the air inlet connecting pipe (2-1).

4. A kit according to claim 3, wherein the air inlet blind hole comprises a frustum-shaped air inlet hole (2-5) and a cylindrical air inlet hole (2-6) which are communicated with each other, the cylindrical air inlet hole (2-6) has a blind end, the small bottom end of the frustum-shaped air inlet hole (2-5) is connected with the cylindrical air inlet hole (2-6), and the large bottom end of the frustum-shaped air inlet hole (2-5) is an open end.

5. A kit as claimed in claim 1, wherein the dispensing means comprises a nozzle connected to the dispensing opening (1-3) and a nozzle arranged at the end of the nozzle;

the spray pipe comprises a spray pipe main body (3-1), spray holes (3-2) arranged along the axial direction of the spray pipe main body (3-1) and magnet rods (3-3) arranged in the spray holes (3-2), wherein a plurality of baffle bars (3-4) along the axial direction of the spray holes (3-2) are uniformly arranged on the inner wall of the spray holes (3-2), one end of each baffle bar (3-4) is provided with a shoulder (3-5) extending towards the center of the spray holes (3-2), and the magnet rods (3-3) move along the axial direction of the spray holes (3-2) in a space enclosed by the shoulders (3-5) and the baffle bars (3-4).

6. A kit according to claim 5, characterized in that the nozzle comprises an annular sleeve (4-1), an end plate (4-2) arranged at one end of the annular sleeve (4-1), a nozzle pipe (4-3) arranged in the center of the end plate (4-2), and a cone-shaped nozzle (4-4) arranged at the end of the nozzle pipe (4-3), the end plate (4-2) is also provided with an annular flange (4-5) surrounding the periphery of the nozzle pipe (4-3), liquid channels (4-6) communicated with the interior of the annular sleeve (4-1) are arranged in the nozzle pipe (4-3) and the conical nozzle (4-4), an annular groove (4-7) is formed between the nozzle pipe (4-3) and the annular flange (4-5) in a surrounding manner;

the annular sleeve (4-1) is in threaded connection or clamped connection with the nozzle main body (3-1).

7. A kit according to claim 6, characterized in that a sealing valve is arranged in said annular sleeve (4-1); the sealing valve comprises a sealing valve main body (5-1) and a cylindrical valve hole (5-2) arranged on the sealing valve main body (5-1), wherein a frustum hole (5-3) is formed in the bottom end of the valve hole (5-2), the frustum hole (5-3) and the valve hole (5-2) are coaxially arranged, and one end of the small bottom of the frustum hole (5-3) is communicated with the bottom end of the valve hole (5-2); the valve hole (5-2) is communicated with the spray hole (3-2), and the frustum hole (5-3) is communicated with the liquid channel (4-6).

8. The kit according to claim 6, wherein the nozzle tube is externally provided with a sealing cover, the sealing cover comprises a sealing cover body (6-1) and a nozzle sealing hole with a blind end, the nozzle sealing hole is arranged on the sealing cover body (6-1), an annular sealing groove (6-2) is arranged on the periphery of the nozzle sealing hole, an annular sealing boss (6-3) extending into the groove is arranged on the side wall of the annular sealing groove (6-2), the nozzle sealing hole is matched with the nozzle tube (4-3) and the conical nozzle opening (4-4), and the annular sealing groove (6-2) is matched with the annular flange (4-5).