A municipal wastewater discharge testing device for green and environmentally friendly applications

Abstract

This invention relates to the field of detection and sampling technology, and provides a municipal sewage discharge detection device for green and environmentally friendly purposes. The device includes a sealed shell, a detection module, an integrated sampling and cleaning module, and a drive module. The integrated sampling and cleaning module includes a rotating unit, a moving unit, a piston, and a cleaning unit. The rotating unit includes a square-hole threaded tube, an annular filter element, and a gear. The annular filter element and gear are fixedly connected to the square-hole threaded tube, which is connected inside the sealed shell. The annular filter element is rotatably mounted within an annular guide rail. A circular tube in the cleaning unit is fixedly positioned between the sealing element and the square tube. A spray valve is fixedly connected to the circular tube, which passes through the piston. The piston surface has a breathable structure. The square tube passes through the square-hole threaded tube. One end of the moving unit is threaded to the surface of the square-hole threaded tube, and the other end is sleeved on the surface of the circular tube. This device features high functional integration, good automation, and high efficiency.

Description

Technical Field

[0001] This invention relates to the field of detection and sampling technology, specifically to a municipal wastewater discharge detection device for green and environmentally friendly purposes. Background Technology

[0002] Green and environmentally friendly municipal wastewater treatment mainly refers to the treatment of urban wastewater through efficient and sustainable methods to achieve the goals of environmental protection and resource recycling. In order to determine whether municipal wastewater discharge meets the standards, the principle of measuring the ammonia nitrogen content in wastewater using testing equipment is generally adopted.

[0003] A search revealed that CN118794747B discloses a water quality testing sampling device and its usage method. Based on an inner tube surface with an inlet pipe, an outlet pipe, and an outlet pipe, the device utilizes a structure design that integrates an air pump module, a pressure piston, a first electromagnet, a second electromagnet, a return spring, a gas-liquid separation mechanism, and an automatic sampling mechanism. This design allows for control of the entry and exit of the first and second puncture tubes into the liquid and gas sampling tubes depending on the sampling medium. Furthermore, by simultaneously raising and lowering the first and second puncture tubes and the pressure piston, the device prevents liquid from entering the outlet pipe when the first puncture tube exits the liquid sampling tube during gas sampling and multiple samplings by the liquid sampling tube. This solves the problem of gases decomposed from water affecting test results during water quality sampling, and features automatic separate sampling of gas and liquid samples and improved accuracy in water quality sample testing.

[0004] Existing water quality testing and sampling devices still have the following drawbacks: low functional integration and poor automation. Without adding a drive module, they cannot complete the collection of water samples, gas samples, and the filtration and cleaning of particulate impurities in one go. Furthermore, they cannot complete the cleaning and waste discharge of the inner wall of the sealed shell in one go, still requiring a lot of manual intervention. As a result, the adaptability, detection accuracy, and efficiency of the equipment are still insufficient. Summary of the Invention

[0005] The purpose of this invention is to provide a green and environmentally friendly municipal wastewater discharge testing device, which aims to solve the problems existing in the current water quality testing and sampling devices.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a municipal wastewater discharge detection device for green and environmentally friendly use, comprising a sealed shell and a drive module, wherein the drive module is connected to the sealed shell, an annular guide rail and a discharge pipe are fixedly disposed on the surface of the sealed shell, and a sample inlet pipe is fixedly disposed on the surface of the annular guide rail, and further comprising:

[0007] The detection module includes a substrate, an ammonia nitrogen sensor, and a first spring. The first spring is fixedly disposed between the substrate and the sealing shell, and the ammonia nitrogen sensor is fixedly disposed on the surface of the substrate.

[0008] The integrated sampling and cleaning module includes a rotating unit, a moving unit, a piston, and a cleaning unit. The rotating unit includes a square-hole threaded tube, an annular filter element, and a gear. The annular filter element and the gear are fixedly connected to the square-hole threaded tube. The square-hole threaded tube is connected to a sealing shell. The annular filter element is rotatably mounted in an annular guide rail.

[0009] The cleaning unit includes a seal, a round tube, a square tube, and a spray valve. The round tube is fixedly disposed between the seal and the square tube. The spray valve is fixedly connected to the round tube. The round tube passes through a piston. The piston surface is provided with a venting structure. The square tube passes through a square-hole threaded tube. One end of the moving unit is threadedly connected to the surface of the square-hole threaded tube, and the other end of the moving unit is sleeved on the surface of the round tube.

[0010] The drive module can be connected to a gear transmission.

[0011] As a further embodiment of the present invention, a rotating housing is also included, which is rotatably disposed at one end of the sealing housing. A toothed ring is provided at the end of the rotating housing, and the drive module can be connected to the toothed ring for transmission. A receiving groove is provided on the surface of the rotating housing, and a pin-shaped plug is fixedly disposed in the receiving groove.

[0012] The beneficial effects of the present invention are: (1) The present application integrates sewage sampling, multi-functional sampling, filtration and cleaning functions into one device, which not only reduces the complexity of the device and the space occupied, but also improves the work efficiency.

[0013] (2) This application adopts a combination of a substrate, an ammonia nitrogen sensor, a displacement sensor, a substrate, an ultrasonic de-icing module and a No. 1 spring. It can not only monitor the ammonia nitrogen content in wastewater in real time, but also has the de-icing function in low temperature environment. Furthermore, it can accurately control the displacement of the substrate by the pressure generated by the piston movement, thereby having the function of automatically discharging wastewater.

[0014] (3) This application utilizes the cooperation between various components within the integrated sampling and cleaning module to ensure that volatile gases in the water sample can enter the corresponding gas sample collection container through the permeable structure while accurately controlling the sampling. It can also achieve efficient filtration and automatic removal of particulate impurities after filtration by controlling the rotation of the annular filter element, and improve the uniformity of cleaning. It has the characteristics of multi-functional accurate sampling and easy maintenance and upgrading. Attached Figure Description

[0015] Figure 1This is a perspective view of the present invention.

[0016] Figure 2 This is an exploded view of the present invention.

[0017] Figure 3 This is a perspective view of the detection module in an embodiment of the present invention.

[0018] Figure 4 This is an exploded view of the integrated sampling and cleaning module according to an embodiment of the present invention.

[0019] Figure 5 This is a perspective view of the rotating unit according to an embodiment of the present invention.

[0020] Figure 6 This is a perspective view of the moving unit according to an embodiment of the present invention.

[0021] Figure 7 This is a perspective view of the cleaning unit according to an embodiment of the present invention.

[0022] Figure 8 This is a perspective view of the integrated sampling and cleaning module according to an embodiment of the present invention.

[0023] Figure 9 This is a perspective view of the rotating housing according to an embodiment of the present invention.

[0024] Figure 10 This is a planar sectional view of the sealing shell according to an embodiment of the present invention.

[0025] Figure 11 This is a partial cross-sectional view of the present invention.

[0026] Figure 12 For the present invention Figure 11 A magnified view of a portion of point a.

[0027] Figure 13 For the present invention Figure 11 A magnified view of a section at point b.

[0028] Figure 14 This is a planar sectional view of the present invention.

[0029] Reference numerals in the attached drawings: 1-Sealing shell, 11-Annular guide rail, 12-Sample inlet, 13-Sample inlet tube, 14-Discharge tube, 15-Central tube, 16-Gas inlet, 17-Blocking ring, 18-Impurity outlet, 181-Scraper bar;

[0030] 2-Detection module, 21-Substrate, 22-Ammonia nitrogen sensor, 23-Detection probe, 24-Displacement sensor, 25-Ultrasonic de-icing module, 26-Spring No. 1;

[0031] 3-Integrated module for sampling and cleaning, 31-Rotating unit, 311-Square hole threaded tube, 312-Supporting frame, 313-Annular filter element, 3131-Rigid ring, 3132-Filter ring, 314-Gear, 32-Moving unit, 321-Threaded sleeve, 322-C-shaped frame, 323-Collar, 33-Piston, 331-Ventilating structure, 34-Cleaning unit, 341-Seal, 342-Round tube, 343-Square tube, 344-Spray valve, 345-Annular groove, 346-Allowing groove, 347-Flexible tube;

[0032] 4-Rotating housing, 41-Receiving groove, 42-Pin plug, 43-Gear ring;

[0033] 5-Drive module, 51-Drive motor, 52-Shaft pin, 53-Drive gear, 54-Electromagnet, 55-Spring No. 2. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0036] Please see Figures 1 to 13 In one embodiment of the present invention, a municipal wastewater discharge detection device for green environmental protection includes a sealing shell 1 and a drive module 5. The drive module 5 is connected to the sealing shell 1. An annular guide rail 11 and a discharge pipe 14 are fixedly disposed on the surface of the sealing shell 1. An inlet pipe 13 is fixedly disposed on the surface of the annular guide rail 11. A one-way valve is disposed inside both the inlet pipe 13 and the discharge pipe 14. The device also includes:

[0037] Detection module 2, the detection module 2 includes a substrate 21, an ammonia nitrogen sensor 22 and a first spring 26, the first spring 26 is fixedly disposed between the substrate 21 and the sealing shell 1, and the ammonia nitrogen sensor 22 is fixedly disposed on the surface of the substrate 21;

[0038] The integrated sampling and cleaning module 3 includes a rotating unit 31, a moving unit 32, a piston 33, and a cleaning unit 34. The rotating unit 31 includes a square-hole threaded tube 311, an annular filter element 313, and a gear 314. The annular filter element 313 and the gear 314 are both fixedly connected to the square-hole threaded tube 311. The square-hole threaded tube 311 is connected to the sealing shell 1. The annular filter element 313 is rotatably disposed in the annular guide rail 11.

[0039] The cleaning unit 34 includes a seal 341, a round tube 342, a square tube 343, and a spray valve 344. The round tube 342 is fixedly disposed between the seal 341 and the square tube 343. The spray valve 344 is fixedly connected to the round tube 342. The round tube 342 passes through the piston 33. The surface of the piston 33 is provided with a breathable structure 331, which includes a nanoporous membrane and a through hole. The nanoporous membrane is embedded in the through hole, allowing only gas to pass through. The square tube 343 passes through a square hole threaded tube 311. One end of the moving unit 32 is threadedly connected to the surface of the square hole threaded tube 311, and the other end of the moving unit 32 is sleeved on the surface of the round tube 342.

[0040] The drive module 5 can be connected to the gear 314 for transmission.

[0041] Please see Figure 5 and Figure 8 Furthermore, the rotating unit 31 also includes a support frame 312, and the annular filter element 313 is composed of a rigid ring 3131 and a filter ring 3132. The support frame 312 is fixedly connected between the square hole threaded tube 311 and the rigid ring 3131.

[0042] Please see Figure 6 and Figure 8 Furthermore, the moving unit 32 includes a threaded sleeve 321, a chamfered frame 322, and a collar 323. The chamfered frame 322 is fixedly connected between the threaded sleeve 321 and the collar 323. The threaded sleeve 321 is threadedly connected to the surface of the square hole threaded tube 311. The chamfered frame 322 is in sliding contact with the inner side of the central tube 15.

[0043] Please see Figures 7 to 11 Furthermore, the cleaning unit 34 also includes an annular groove 345, a clearance groove 346, and a flexible tube 347. The annular groove 345 is provided on the surface of the circular tube 342, and the collar 323 is movably fitted inside the annular groove 345. The sealing element 341 is a circular shell, and the clearance groove 346 is provided on the surface of the circular shell. The spray valve 344 is distributed inside the clearance groove 346, and the flexible tube 347 is connected between the square tube 343 and the water pump.

[0044] In this embodiment of the invention, since the clearance groove 346 on the sealing member 341 corresponds to the position of the venting structure 331 in the initial state, after sampling, the clearance groove 346 on the sealing member 341 also corresponds to the position of the venting structure 331. It should be noted that when it is not necessary to collect gas samples, the clearance groove 346 on the sealing member 341 can also be offset from the position of the venting structure 331 by controlling the rotation angle of the square hole threaded tube 311, so that the venting structure 331 can be sealed by the sealing member 341.

[0045] Please see Figure 1, Figure 9 and Figure 12 In one embodiment of the present invention, a rotating housing 4 is further included. The rotating housing 4 is rotatably disposed at one end of the sealing housing 1. A toothed ring 43 is provided at the end of the rotating housing 4. The driving module 5 can be connected to the toothed ring 43 in a transmission manner. A receiving groove 41 is provided on the surface of the rotating housing 4. A pin plug 42 is fixedly disposed in the receiving groove 41. When the gas sample collection container is placed into the receiving groove 41, the pin plug 42 is inserted into the gas sample collection container and uses the sampling port at one end of it.

[0046] Please see Figure 10 and Figure 11 Furthermore, a central tube 15 is fixedly provided at one end of the sealing shell 1, the rotating shell 4 is rotatably disposed outside the central tube 15, the square hole threaded tube 311 is connected to the inner side of the central tube 15, and a gas guide port 16 is provided between the sealing shell 1 and the rotating shell 4. The sealing shell 1 and the rotating shell 4 are slidably fitted together. The number of gas guide ports 16 is one or two. When the needle plug 42 is aligned with the gas guide port 16, the volatile gas enters the gas sample collection container through the gas guide port 16 and the needle plug 42.

[0047] Please see Figure 12 Furthermore, the drive module 5 includes a drive motor 51, a shaft pin 52, a drive gear 53, an electromagnet 54, and a second spring 55. The drive motor 51 is fixedly mounted on the end of the central tube 15 and is connected to the shaft pin 52. The drive gear 53 is movably sleeved on the surface of the shaft pin 52. The mating structure between the drive gear 53 and the shaft pin 52 is a key and a keyway, which can be slidably connected. The electromagnet 54 is fixedly connected to the outer housing of the drive motor 51, and the second spring 55 is connected between the drive gear 53 and the electromagnet 54.

[0048] In this embodiment of the invention, the control principle of the drive module 5 is as follows: When the control electromagnet 54 is de-energized, the elastic force of the second spring 55 drives the drive gear 53 to move along the shaft pin 52 to its end. At this time, the gear ring 43 is connected to the drive gear 53, and the drive motor 51 can control the rotation of the rotating housing 4 to achieve the purpose of automatically switching the gas sample collection container. When the control electromagnet 54 is energized, the electromagnet 54 and the drive gear 53 (or the magnet integrated on the surface of the drive gear 53) are magnetically attached. At this time, the gear 314 is connected to the drive gear 53, and the drive motor 51 can control the rotation of the rotating unit 31.

[0049] Please see Figure 11 and Figure 12In one embodiment of the present invention, a retaining ring 17 is fixedly provided on the inner side of the sealing shell 1, the substrate 21 is able to contact the surface of the retaining ring 17, the substrate 21 is in sliding contact with the inner wall of the sealing shell 1, a sample inlet 12 is provided between the sealing shell 1 and the annular guide rail 11, a waste discharge port 18 is provided on the surface of the annular guide rail 11, a scraper 181 is fixedly provided at the waste discharge port 18, and the scraper 181 is in sliding contact with the surface of the filter ring 3132.

[0050] Please see Figure 3 Furthermore, the detection module 2 also includes a detection probe 23, a displacement sensor 24, and an ultrasonic de-icing module 25. The detection probe 23 is fixedly disposed on the side of the substrate 21 away from the ammonia nitrogen sensor 22, and the displacement sensor 24 and the ultrasonic de-icing module 25 are both fixedly disposed on the side of the substrate 21 near the first spring 26.

[0051] In this embodiment of the invention, after the water sample enters the sealed shell 1, the gravity of the water sample submerging the detection probe 23 acts on the surface of the substrate 21. Since the upward elastic force of the first spring 26 is greater than the sum of the gravity of the detection module 2 and the water sample, the coordinate position of the detection probe 23 will not be affected during the sampling process. The ammonia nitrogen sensor 22 uses the principle of the detection probe 23 to determine the concentration of ammonia nitrogen in the water to achieve the purpose of determining whether the municipal sewage discharge meets the standards. The data after detection is finally transmitted to the remote computer terminal through the wireless transmission unit.

[0052] Working Principle: Quantitative water sample collection and detection principle: First, the drive module 5 controls the rotation of the rotating unit 31. The synchronously rotating square-hole threaded tube 311 can control the piston 33 and the cleaning unit 34 to move away from the detection module 2 through the cooperation structure between the threaded sleeve 321, the grommets 322, the collar 323 and the annular groove 345. It can also control the cleaning unit 34 to rotate independently through the square tube 343. The negative pressure generated by the moving piston 33 drives the water sample through the sample inlet tube 13 into the annular guide rail 11. The annular filter element 313 inside the annular guide rail 11 filters out particulate impurities. The filtered water sample enters the sealing shell 1 through the sample inlet 12. By precisely controlling the rotation angle of the square-hole threaded tube 311, not only can the displacement of the piston 33 and the amount of water sample collected be precisely controlled, but also the rotation angle of the sealing element 341 can be precisely controlled.

[0053] During this process, the annular filter element 313, which rotates synchronously with the square hole threaded tube 311, can continuously switch the corresponding positions of the filter ring 3132 and the inlet 12 or the inlet tube 13. On the other hand, it can use the scraper 181 to remove particulate impurities from the surface of the filter ring 3132. This not only reduces the resistance of the water sample passing through the filter ring 3132, but also prevents particulate impurities from adhering to the surface of the detection probe 23 and affecting the detection accuracy.

[0054] After the water sample enters the sealed housing 1, the ammonia nitrogen sensor 22 uses the detection probe 23 to measure the concentration of ammonia nitrogen in the water to determine whether the municipal sewage discharge meets the standards. The detected data is finally transmitted to a remote computer terminal through a wireless transmission unit. When the ammonia nitrogen content in municipal sewage is high, gases such as ammonia, hydrogen sulfide, methane, and volatile organic compounds are easily generated in the water sample. These gases enter the gas sampling tube through the vent structure 331, the air inlet 16, and the pin plug 42, which makes it convenient for users to detect the specific chemical components in the volatile gases. When secondary or multiple tests are required, the drive module 5 controls the rotating housing 4 to rotate, so that another set of receiving slots 41 or pin plug 42 corresponds to the air inlet 16, which has the feature of automatically switching gas sample collection.

[0055] Water sample discharge and cleaning principle: First, the drive module 5 controls the movement of the integrated sampling and cleaning module 3. Since the pressure generated by the downward moving piston 33 can overcome the elastic force of the first spring 26, it can drive the substrate 21 to move downward. The displacement sensor 24 can monitor its movement distance in real time until the substrate 21 is located at a certain position below the discharge pipe 14 and stops. At this time, the water sample can be discharged through the discharge pipe 14. Then, the water pump sprays clean water through the flexible pipe 347, square pipe 343, round pipe 342 and spray valve 344 onto the inner wall of the sealing shell 1. The drive module 5 controls the reciprocating motion of the integrated sampling and cleaning module 3, which can improve the uniformity of cleaning and automatically discharge the waste liquid after cleaning.

[0056] In summary, this application integrates sewage sampling, multi-functional sampling, filtration, and cleaning functions into one device, which not only reduces the complexity and footprint of the equipment but also improves work efficiency.

[0057] This application uses a combination of a substrate 21, an ammonia nitrogen sensor 22, a displacement sensor 24, a base plate, an ultrasonic de-icing module, and a spring 26. It can not only monitor the ammonia nitrogen content in wastewater in real time, but also has a de-icing function in low-temperature environments. Furthermore, it can precisely control the displacement of the base plate by the pressure generated by the movement of the piston 33, thereby enabling automatic wastewater discharge.

[0058] This application utilizes the cooperation between various components within the integrated sampling and cleaning module 3 to precisely control sampling while ensuring that volatile gases in the water sample enter the corresponding gas sample collection container through the ventilated structure 331. By controlling the rotation of the annular filter element 313, it achieves efficient filtration and automatic removal of filtered particulate impurities, while also improving the uniformity of cleaning. It features multi-functional precise sampling and easy maintenance and upgrades.

[0059] While several embodiments and examples of the present invention have been described for those skilled in the art, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention.

[0060] 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. A municipal wastewater discharge testing device for green environmental protection, comprising a sealed shell (1) and a drive module (5), wherein the drive module (5) is connected to the sealed shell (1), and an annular guide rail (11) and a discharge pipe (14) are fixedly disposed on the surface of the sealed shell (1), and an inlet pipe (13) is fixedly disposed on the surface of the annular guide rail (11), characterized in that, Also includes: The detection module (2) includes a substrate (21), an ammonia nitrogen sensor (22), and a first spring (26). The first spring (26) is fixedly disposed between the substrate (21) and the sealing shell (1), and the ammonia nitrogen sensor (22) is fixedly disposed on the surface of the substrate (21). The integrated sampling and cleaning module (3) includes a rotating unit (31), a moving unit (32), a piston (33), and a cleaning unit (34). The rotating unit (31) includes a square hole threaded tube (311), an annular filter element (313), and a gear (314). The annular filter element (313) and the gear (314) are fixedly connected to the square hole threaded tube (311). The square hole threaded tube (311) is connected to the sealing shell (1). The annular filter element (313) is rotatably arranged in the annular guide rail (11). The cleaning unit (34) includes a seal (341), a round tube (342), a square tube (343), and a spray valve (344). The round tube (342) is fixedly disposed between the seal (341) and the square tube (343). The spray valve (344) is fixedly connected to the round tube (342). The round tube (342) passes through the piston (33). The piston (33) has a venting structure (331) on its surface. The square tube (343) passes through a square hole threaded tube (311). One end of the moving unit (32) is threaded to the surface of the square hole threaded tube (311), and the other end of the moving unit (32) is sleeved on the surface of the round tube (342). When the drive module (5) is connected to the gear (314) for transmission, it is used to control the amount of water quality sample collected and to prevent particulate impurities from affecting the detection accuracy. It also includes a rotating housing (4), which is rotatably disposed at one end of the sealing housing (1). A toothed ring (43) is provided at the end of the rotating housing (4). When the drive module (5) is connected to the toothed ring (43) in a transmission, it is used to achieve the purpose of automatically switching the gas sample collection container. A receiving groove (41) is provided on the surface of the rotating housing (4), and a pin plug (42) is fixedly disposed in the receiving groove (41). One end of the sealing shell (1) is fixedly provided with a central tube (15), the rotating shell (4) is rotatably provided on the outside of the central tube (15), the square hole threaded tube (311) is connected to the inside of the central tube (15), and an air duct (16) is provided between the sealing shell (1) and the rotating shell (4).

2. The municipal wastewater discharge testing equipment for green environmental protection according to claim 1, characterized in that, A retaining ring (17) is fixedly provided on the inner side of the sealing shell (1), and the substrate (21) can contact the surface of the retaining ring (17). An inlet (12) is provided between the sealing shell (1) and the annular guide rail (11).

3. The municipal wastewater discharge testing equipment for green environmental protection according to claim 1, characterized in that, The detection module (2) also includes a detection probe (23), a displacement sensor (24), and an ultrasonic de-icing module (25). The detection probe (23) is fixedly disposed on the side of the substrate (21) away from the ammonia nitrogen sensor (22). The displacement sensor (24) and the ultrasonic de-icing module (25) are both fixedly disposed on the side of the substrate (21) close to the first spring (26).

4. The municipal wastewater discharge testing equipment for green environmental protection according to claim 1, characterized in that, The rotating unit (31) also includes a support frame (312), and the annular filter element (313) is composed of a rigid ring (3131) and a filter ring (3132). The support frame (312) is fixedly connected between the square hole threaded tube (311) and the rigid ring (3131).

5. The municipal wastewater discharge testing equipment for green environmental protection according to claim 1, characterized in that, The moving unit (32) includes a threaded sleeve (321), a grommet frame (322), and a collar (323). The grommet frame (322) is fixedly connected between the threaded sleeve (321) and the collar (323). The threaded sleeve (321) is threadedly connected to the surface of the square hole threaded tube (311). The grommet frame (322) slides in contact with the inner side of the central tube (15).

6. The municipal wastewater discharge testing equipment for green environmental protection according to claim 5, characterized in that, The cleaning unit (34) further includes an annular groove (345), a clearance groove (346), and a flexible tube (347). The annular groove (345) is provided on the surface of the circular tube (342). The collar (323) is movably fitted inside the annular groove (345). The sealing element (341) is a circular shell. The clearance groove (346) is provided on the surface of the circular shell. The spray valve (344) is distributed in the clearance groove (346). The flexible tube (347) is connected between the square tube (343) and the water pump.

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