A device for spraying microbial powder

Abstract

The utility model belongs to the field of microorganism spraying technology, especially a kind of device for spraying microorganism bacterial powder, including machine cover, the inside installation of machine cover has baffle;The surface of baffle is equipped with the mixing bucket for mixing bacterial powder;The surface of machine cover is equipped with liquid storage barrel, and the inside sliding connection of liquid storage barrel is used to push and extrude piston for extruding liquid, and one end of push and extrude piston penetrates liquid storage barrel, and is connected with the clamping plate being arranged at the top of liquid storage barrel, and the outside of liquid storage barrel is equipped with adjusting sliding bracket, and the fixed mounting of adjusting sliding bracket is equipped with clamping sleeve plate, and clamping sleeve plate sliding connection is in one end of push and extrude piston penetrates the outer surface of liquid storage barrel, and it is used for limiting clamping plate;The beneficial effects of the utility model are accurate liquid inlet amount adjustment, accurate concentration guarantee, reliable experimental data foundation, bacterial powder loss and agglomeration reduction, improved mixing uniformity, retained microbial activity, reduced residue, flexible switching spraying state, expanded range, suitable for various bacteria inoculation experiments.

Description

Technical Field

[0001] This utility model relates to a microbial powder spraying device, specifically a device for spraying microbial powder, belonging to the field of microbial spraying technology. Background Technology

[0002] Microbial inoculants are live bacterial preparations made by industrially propagating target microorganisms and then using porous materials as adsorbents to adsorb the fermentation broth of the microorganisms. Microbial inoculants can improve soil, restore soil fertility, prevent soil-borne diseases, maintain the balance of rhizosphere microbiota, and degrade toxic substances. Proper use of agricultural microbial inoculants can increase crop yields, improve crop quality, reduce fertilizer use, lower costs, improve soil, and protect the ecological environment.

[0003] In the prior art, such as the microbial agent spraying device disclosed in announcement number CN214902031U, this spraying device solves the problems of low spraying efficiency and uneven mixing of existing microbial agents, achieving full mixing of microbial agents and ensuring comprehensive and efficient spraying. It is widely used in the field of agricultural planting and has significant practical advantages. However, the above-mentioned prior art solutions have the following shortcomings: When the above-mentioned spraying device is used, the water is introduced into the spraying mixing tank through the liquid inlet pipe to mix with the microbial agent. The water inlet volume cannot be precisely controlled. When the actual water inlet volume is more than the theoretical value, the concentration of the bacterial powder is diluted, which may result in insufficient inoculum and weakened microbial colonization effect. On the other hand, insufficient water inlet volume will result in excessively high concentration, which may inhibit plant growth or interfere with the balance of the microbial community. Ultimately, this will result in poor repeatability and low reliability of experimental data, affecting the scientific nature of the research conclusions. Summary of the Invention

[0004] The purpose of this invention is to provide a device for spraying microbial powder, which solves the problem that when the above-mentioned device introduces water into the spray mixing tank through the inlet pipe to mix with the microbial agent, the water inlet volume cannot be precisely controlled, which easily leads to concentration deviation, poor experimental data, and unreliable conclusions.

[0005] The present invention achieves the above objectives through the following technical solution: a device for spraying microbial powder, comprising a machine cover, a partition installed inside the machine cover, and a mixing tank for mixing the powder installed on the surface of the partition; A liquid storage tank is installed on the surface of the machine cover. Inside the liquid storage tank, a pusher piston for pushing liquid is slidably connected. One end of the pusher piston passes through the liquid storage tank and is connected to a clamping plate set on the top of the liquid storage tank. An adjusting slide is fitted on the outside of the liquid storage tank. A clamping plate is fixedly installed on the adjusting slide. The clamping plate is slidably connected to the outer surface of the end of the pusher piston that passes through the liquid storage tank and is used to limit the clamping plate. The bottom of the storage tank is connected to a one-way inlet pipe and a one-way supply pipe. One end of the one-way inlet pipe passes through the machine cover and extends into the storage tank. The one-way supply pipe is used to connect to an external storage source to supply liquid into the storage tank. A bacterial powder adding hopper is installed on the surface of the machine cover. The bottom end of the bacterial powder adding hopper extends into the storage tank for adding bacterial powder. The bacterial powder adding hopper is made of a smooth, anti-static material to reduce bacterial powder adhesion and static electricity.

[0006] As a further embodiment of this utility model: the surface of the liquid storage tank is provided with several adjustment and positioning holes at equal intervals, the surface of the adjustment slide is fixedly mounted with a fixing frame, the surface of the fixing frame is slidably connected with a limit rod, the limit rod passes through the limit rod and the adjustment slide in sequence and is inserted into the adjustment and positioning hole, the surface of the limit rod is fitted with a spring, one end of the spring abuts against the fixing frame, and the other end of the spring abuts against the annular protrusion integrally formed on the outer surface of the limit rod.

[0007] As a further embodiment of this utility model: the surface of the adjusting slide is integrally formed with a guide block, and the outer side of the liquid storage tank is provided with a guide groove that matches the guide block. The adjusting slide is slidably connected to the outer side of the liquid storage tank through the guide block and the guide groove.

[0008] As a further improvement of this utility model: a stirring rod is provided inside the liquid storage tank, and a servo motor is installed on the bottom surface of the partition. One end of the stirring rod passes through the liquid storage tank and is connected to the output shaft end of the servo motor.

[0009] As a further improvement of this utility model: two spiral mixing blades are installed on the surface of the stirring rod, the spiral directions of the two spiral mixing blades are arranged in opposite directions, and spiral blades are fixed on the inner wall of the storage tank.

[0010] As a further embodiment of this utility model: the bottom of the storage tank is inclined, and the inlet of the circulation pump is connected to the bottom of the inclined end of the storage tank. The circulation pump is fixedly installed on the surface of the partition. The outlet of the circulation pump is connected to the outlet pipe, and the end of the outlet pipe is provided with multiple spray holes for spraying.

[0011] As a further embodiment of this utility model: the outlet end of the liquid outlet pipe is rotatably connected to an adjustment sleeve for adjusting the spraying state. The surface of the adjustment sleeve is provided with multiple adjustment holes, the number of adjustment holes being opposite to the spray holes. A horn cover is fixed to the bottom end of the adjustment sleeve.

[0012] As a further embodiment of this utility model: a locking sleeve is slidably connected to the surface of the outlet end of the outlet pipe along the length of the outlet pipe, a number of locking teeth are fixed on the bottom surface of the locking sleeve, and a groove that matches the locking teeth is opened on the surface of the adjusting sleeve. A second spring is abutted against the surface of the outlet end of the outlet pipe, and the other end of the second spring abuts against one end surface of the locking sleeve.

[0013] The beneficial effects of this utility model are: This invention, through the adjustment of the slide, the clamping plate, and the clamping plate, combined with the adjustment positioning hole and the limiting rod on the surface of the liquid storage tank, can precisely control the stroke of the pushing piston, realize the quantitative adjustment of the liquid inlet, and meet the different needs of different experiments for the concentration of bacterial powder. At the same time, the guide block and the guide groove ensure the stability of the sliding of the adjustment slide, and the spring further fixes its position to avoid liquid inlet deviation caused by vibration, thus ensuring the accuracy of the mixed liquid concentration from the source and laying the foundation for the reliability of experimental data. The bacterial powder addition hopper is made of polyethylene (PE) with added antistatic agent to reduce bacterial powder adhesion and electrostatic agglomeration, ensuring that the bacterial powder is completely inserted into the storage tank. The servo motor driven stirring rod, combined with the reverse spiral mixing blades and the spiral blades on the inner wall of the storage tank, forms an upward and downward convection and vortex mixing, which makes the bacterial powder and liquid fully blended and significantly improves the mixing uniformity. In addition, the smooth material and gentle stirring method reduce physical damage to the bacterial powder, better preserve the activity of microorganisms, and ensure the experimental results. The inclined bottom design of the liquid tank, combined with the circulating pump, reduces the residue of the mixed liquid and delivers it efficiently. The spray nozzle of the liquid outlet pipe and the adjustment hole of the adjustment sleeve can be adjusted by rotating to switch between spray and water flow modes. With the addition of the horn cover, the spraying range can be expanded to meet the needs of different scenarios such as foliar spraying and root application. The combination of the locking sleeve and spring II ensures stable spraying and is suitable for diverse inoculation experiments in laboratories and experimental plots. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of a partial internal structure of the casing in this utility model; Figure 3 This is a schematic diagram of the structure of the liquid tank, the push piston, and the clamping plate in this utility model; Figure 4 This is a schematic diagram of the structure of the sleeve plate, adjusting slide, and guide block in this utility model; Figure 5 This is a partial schematic diagram of the internal structure of the mixing tank in this utility model; Figure 6 This is a schematic diagram of the structure of the one-way liquid inlet pipe and the one-way liquid supply pipe in this utility model; Figure 7 This is a schematic diagram of the structure of the locking teeth, the locking groove, and the locking sleeve in this utility model; Figure 8 In this utility model Figure 4 An enlarged schematic diagram of the structure at point A in the diagram.

[0015] In the diagram: 1. Machine cover; 2. Partition plate; 3. Mixing tank; 4. Bacterial powder addition hopper; 5. Storage tank; 6. Push piston; 7. Adjustment positioning hole; 8. Clamping plate; 9. Clamping sleeve plate; 10. Adjustment slide; 11. Fixing frame; 12. Limiting rod; 13. Spring 1; 14. Ring protrusion; 15. Servo motor; 16. Stirring rod; 17. Spiral mixing blade; 18. Spiral blade; 19. One-way liquid inlet pipe; 20. One-way liquid supply pipe; 21. Circulation pump; 22. Liquid outlet pipe; 23. Spray nozzle; 24. Adjusting sleeve; 25. Adjusting hole; 26. Locking sleeve; 27. Spring 2; 28. Clamping tooth; 29. ​​Clamping groove; 30. Guide block; 31. Guide strip groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1 like Figures 1 to 8 As shown, an apparatus for spraying microbial powder includes a machine cover 1, a partition 2 installed inside the machine cover 1, and a mixing tank 3 for mixing the powder installed on the surface of the partition 2. A liquid storage tank 5 is installed on the surface of the cover 1. A pusher piston 6 for pushing liquid is slidably connected inside the liquid storage tank 5. One end of the pusher piston 6 passes through the liquid storage tank 5 and is connected to a clamping plate 8 set on the top of the liquid storage tank 5. An adjusting slide 10 is sleeved on the outside of the liquid storage tank 5. A clamping plate 9 is fixedly installed on the adjusting slide 10. The clamping plate 9 is slidably connected to the outer surface of the end of the pusher piston 6 that passes through the liquid storage tank 5 and is used to limit the clamping plate 8. The bottom of the storage tank 5 is connected to a one-way inlet pipe 19 and a one-way supply pipe 20. One end of the one-way inlet pipe 19 passes through the machine cover 1 and extends into the storage tank 5. The one-way supply pipe 20 is used to connect to an external storage source to supply liquid into the storage tank 5. A bacterial powder adding hopper 4 is installed on the surface of the machine cover 1. The bottom end of the bacterial powder adding hopper 4 extends into the storage tank 5 for adding bacterial powder. The bacterial powder adding hopper 4 is made of a smooth anti-static material to reduce bacterial powder adhesion and static electricity.

[0018] The storage tank 5 is used to store the liquid to be mixed with the bacterial powder. The push piston 6 can slide inside the storage tank 5 to push the liquid flow and provide power for liquid inlet. The clamping plate 8 is connected to the push piston 6 and works with the clamping sleeve plate 9. By adjusting the position of the slide 10, the clamping sleeve plate 9 can be used to limit the clamping plate 8, which can precisely control the stroke of the push piston 6 and thus precisely adjust the liquid inlet volume to meet the needs of mixing bacterial powders of different concentrations. The clamping sleeve plate 9 is slidably connected to the outer surface of the push piston 6 to effectively limit the clamping plate 8. The one-way liquid inlet pipe 19 ensures that the liquid flows from the storage tank 5 into the mixing tank 3 in one direction, avoiding backflow of the mixed liquid and contamination of the storage tank. The one-way liquid supply pipe 20 is used to replenish the liquid from the external liquid source to the storage tank 5 in one direction, ensuring the one-way and continuous liquid supply. The bacterial powder adding hopper 4 is made of polyethylene (PE) material with added antistatic agent, which can reduce the friction and adhesion between the bacterial powder and the hopper wall, prevent the bacterial powder from adsorbing and agglomerating due to electrostatic effect, ensure that the bacterial powder enters the storage tank 5 smoothly, reduce loss and ensure experimental accuracy.

[0019] Furthermore, the surface of the liquid storage tank 5 is provided with several adjustment and positioning holes 7 at equal intervals. A fixing frame 11 is fixedly installed on the surface of the adjustment slide 10. A limiting rod 12 is slidably connected to the surface of the fixing frame 11. One end of the limiting rod 12 passes through the adjusting slide 10 and is inserted into the adjustment and positioning hole 7. A spring 13 is sleeved on the surface of the limiting rod 12. One end of the spring 13 abuts against the fixing frame 11, and the other end of the spring 13 abuts against the annular protrusion 14 integrally formed on the outer surface of the limiting rod 12.

[0020] The adjustment positioning holes 7 on the surface of the liquid storage tank 5 provide multiple positioning positions for the adjustment slide 10, which facilitates the adjustment of the liquid inlet volume according to the requirements. The limit rod 12 is inserted into the corresponding adjustment positioning hole 7 to fix the adjustment slide 10. The spring 13 is sleeved on the limit rod 12, with one end abutting against the fixing frame 11 and the other end abutting against the annular protrusion 14. The elastic force of the spring 13 keeps the limit rod 12 inserted into the adjustment positioning hole 7, ensuring the stability of the adjustment slide 10 and preventing displacement due to vibration and other factors, which would affect the accuracy of the liquid inlet volume control.

[0021] Furthermore, the surface of the adjusting slide 10 is integrally formed with a guide block 30, and the outer side of the liquid storage tank 5 is provided with a guide groove 31 that matches the guide block 30. The adjusting slide 10 is slidably connected to the outer side of the liquid storage tank 5 through the guide block 30 and the guide groove 31.

[0022] The guide block 30 on the surface of the adjusting slide 10 is adapted to the guide groove 31 on the outside of the liquid storage tank 5, so that the adjusting slide 10 can only slide along the length direction of the liquid storage tank 5, which restricts the sliding direction of the adjusting slide 10, prevents it from rotating or deviating during the sliding process, ensures the accuracy of the movement of the adjusting slide 10, and at the same time ensures that the limiting rod 12 can be smoothly inserted into the adjusting positioning hole 7, thereby ensuring the accuracy of the liquid inlet adjustment.

[0023] Furthermore, a stirring rod 16 is installed inside the liquid storage tank 5, and a servo motor 15 is installed on the bottom surface of the partition 2. One end of the stirring rod 16 passes through the liquid storage tank 5 and is connected to the output shaft end of the servo motor 15.

[0024] The stirring rod 16 inside the storage tank 5 rotates under the drive of the servo motor 15, which can stir the liquid in the storage tank 5, so that the liquid is fully mixed with the subsequently added bacterial powder. The servo motor 15 is installed on the bottom surface of the partition plate 2, providing stable power to the stirring rod 16. The servo motor 15 can precisely control the speed and can adjust the stirring speed according to the mixing requirements to improve the mixing effect.

[0025] Furthermore, two spiral mixing blades 17 are mounted on the surface of the stirring rod 16, with the spiral directions of the two spiral mixing blades 17 being arranged in opposite directions, and spiral blades 18 are fixed to the inner wall of the storage tank 5.

[0026] Two spiral mixing blades 17 with opposite spiral directions are installed on the surface of the stirring rod 16. When rotating, they can cause the liquid in the storage tank 5 to form vertical convection, which enhances the mixing effect. The spiral blades 18 fixed on the inner wall of the storage tank 5, together with the spiral mixing blades 17, further disturb the liquid flow state, making the liquid mix more uniform, ensuring that the microbial powder can be fully integrated with the liquid, and improving the uniformity of the mixture.

[0027] Example 2 Improvements based on Example 1: Furthermore, the bottom of the storage tank 5 is inclined, and the inlet of the circulation pump 21 is connected to the bottom of the inclined end of the storage tank 5. The circulation pump 21 is fixedly installed on the surface of the partition plate 2, and the outlet of the circulation pump 21 is connected to the outlet pipe 22. The end of the outlet pipe 22 is provided with multiple spray holes 23 for spraying.

[0028] The bottom of the storage tank 5 is inclined to facilitate the accumulation of the mixture at the inlet of the circulation pump 21, reducing the residue of the mixture. The circulation pump 21 is installed on the surface of the partition plate 2, and its inlet is connected to the bottom of the inclined end of the storage tank 5, which can extract the mixture. The outlet pipe 22 is connected to the outlet end of the circulation pump 21 to transport the mixture to the end. Multiple spray holes 23 at the end of the outlet pipe 22 can disperse the mixture and spray it out to achieve uniform spraying of the target area.

[0029] Furthermore, the outlet end of the liquid outlet pipe 22 is rotatably connected to an adjustment sleeve 24 for adjusting the spraying state. The surface of the adjustment sleeve 24 is provided with multiple adjustment holes 25, the number of which corresponds to the number of spray holes 23. A horn cover is fixed to the bottom end of the adjustment sleeve 24.

[0030] The adjusting sleeve 24, which is rotatably connected to the outlet end of the liquid outlet pipe 22, can be rotated to change the degree of overlap between the adjusting hole 25 on its surface and the spray hole 23, thereby adjusting the spraying amount and spraying state. The number of adjusting holes 25 is opposite to that of the spray hole 23, ensuring the correspondence of the adjustment. The horn cover fixed at the bottom of the adjusting sleeve 24 can make the sprayed mixed liquid more evenly distributed, expand the spraying range, and improve the spraying effect.

[0031] Furthermore, a locking sleeve 26 is slidably connected to the surface of the outlet end of the outlet pipe 22 along the length of the outlet pipe 22. Several locking teeth 28 are fixed on the bottom surface of the locking sleeve 26. The surface of the adjusting sleeve 24 is provided with a groove 29 that matches the locking teeth 28. A second spring 27 is abutted against the surface of the outlet end of the outlet pipe 22. The other end of the second spring 27 abuts against one end surface of the locking sleeve 26.

[0032] The spring force keeps the locking teeth 28 on the locking sleeve 26 locked into the slot 29, fixing the position of the adjusting sleeve 24 and preventing the adjusting sleeve 24 from rotating due to vibration or other factors during spraying, thus ensuring stable spraying. Pulling the locking sleeve 26 upwards can disengage the locking teeth 28 from the slot 29, making it easier to rotate the adjusting sleeve 24 to adjust the spraying state.

[0033] Working principle: During use, liquid is injected into the storage tank 5 through the one-way liquid supply pipe 20. According to the required liquid volume, the position of the adjusting slide 10 on the outside of the storage tank 5 is adjusted. The adjusting slide 10 is fixed by inserting the limiting rod 12 into the corresponding adjusting positioning hole 7, so that the limiting height of the sleeve plate 9 on the clamping plate 8 is adapted to the liquid volume requirement. Then, the pushing piston 6 is pushed, and the liquid in the storage tank 5 enters the mixing tank 3 through the one-way liquid inlet pipe 19. If mixing is required, the servo motor 15 is started to drive the stirring rod 16 to rotate. The liquid is stirred and mixed by the spiral mixing blades 17 and spiral vanes 18. Then, the circulation pump 21 is started, and the liquid is transported to the spray hole 23 through the liquid outlet pipe 22. The spraying state is adjusted by rotating the adjusting sleeve 24 according to the spraying requirements. The liquid is sprayed out through the spray hole 23 and the adjusting hole 25 to complete the spraying operation.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An apparatus for spraying microbial powder, comprising a hood (1), wherein a partition (2) is installed inside the hood (1), and a mixing tank (3) for mixing the powder is installed on the surface of the partition (2); characterized in that: A liquid storage tank (5) is installed on the surface of the hood (1). A pusher piston (6) for pushing liquid is slidably connected inside the liquid storage tank (5). One end of the pusher piston (6) passes through the liquid storage tank (5) and is connected to a clamping plate (8) set on the top of the liquid storage tank (5). An adjusting slide (10) is sleeved on the outside of the liquid storage tank (5). A clamping plate (9) is fixedly installed on the adjusting slide (10). The clamping plate (9) is slidably connected to the outer surface of the end of the pusher piston (6) that passes through the liquid storage tank (5) and is used to limit the clamping plate (8). The bottom of the storage tank (5) is connected to a one-way inlet pipe (19) and a one-way supply pipe (20). One end of the one-way inlet pipe (19) passes through the machine cover (1) and extends into the storage tank (5). The one-way supply pipe (20) is connected to an external storage source to supply liquid into the storage tank (5). A bacterial powder adding hopper (4) is installed on the surface of the machine cover (1). The bottom end of the bacterial powder adding hopper (4) extends into the storage tank (5). The bacterial powder adding hopper (4) is made of a smooth anti-static material.

2. The device for spraying microbial powder according to claim 1, characterized in that: The surface of the liquid storage tank (5) is provided with several adjustment and positioning holes (7) at equal intervals. A fixing frame (11) is fixedly installed on the surface of the adjustment slide (10). A limiting rod (12) is slidably connected to the surface of the fixing frame (11). One end of the limiting rod (12) passes through the adjusting slide (10) and is inserted into the adjustment and positioning hole (7). A spring (13) is sleeved on the surface of the limiting rod (12). One end of the spring (13) abuts against the fixing frame (11). The other end of the spring (13) abuts against the annular protrusion (14) integrally formed on the outer surface of the limiting rod (12).

3. The device for spraying microbial powder according to claim 1, characterized in that: The surface of the adjusting slide (10) is integrally formed with a guide block (30), and the outer side of the liquid storage tank (5) is provided with a guide groove (31) that matches the guide block (30). The adjusting slide (10) is slidably connected to the outer side of the liquid storage tank (5) through the guide block (30) and the guide groove (31).

4. The device for spraying microbial powder according to claim 3, characterized in that: The storage tank (5) is equipped with a stirring rod (16), and a servo motor (15) is installed on the bottom surface of the partition (2). One end of the stirring rod (16) passes through the storage tank (5) and is connected to the output shaft end of the servo motor (15).

5. The apparatus for spraying microbial powder according to claim 4, characterized in that: Two spiral mixing blades (17) are installed on the surface of the stirring rod (16), and the spiral directions of the two spiral mixing blades (17) are opposite. A spiral blade (18) is fixed on the inner wall of the liquid storage tank (5).

6. The apparatus for spraying microbial powder according to claim 5, characterized in that: The bottom of the storage tank (5) is inclined, and the inlet of the circulation pump (21) is connected to the bottom of the inclined end of the storage tank (5). The circulation pump (21) is fixedly installed on the surface of the partition (2). The outlet of the circulation pump (21) is connected to the outlet pipe (22). The end of the outlet pipe (22) is provided with multiple spray holes (23) for spraying.

7. The apparatus for spraying microbial powder according to claim 6, characterized in that: The outlet end of the liquid outlet pipe (22) is rotatably connected to an adjustment sleeve (24) for adjusting the spraying state. The surface of the adjustment sleeve (24) is provided with multiple adjustment holes (25). The number of adjustment holes (25) is opposite to the number of spray holes (23). A horn cover is fixed at the bottom end of the adjustment sleeve (24).

8. The apparatus for spraying microbial powder according to claim 7, characterized in that: A locking sleeve (26) is slidably connected to the liquid outlet end surface of the liquid outlet pipe (22) along the length direction of the liquid outlet pipe (22). Several locking teeth (28) are fixed on the bottom surface of the locking sleeve (26). The surface of the adjusting sleeve (24) is provided with a groove (29) that matches the locking teeth (28). A second spring (27) abuts against the liquid outlet end surface of the liquid outlet pipe (22). The other end of the second spring (27) abuts against one end surface of the locking sleeve (26).

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