A silicone adhesive cleaning nozzle suitable for narrow space and a cleaning method

Abstract

The present application relates to pipeline cleaning technical field, especially to a kind of silicone glue cleaning spray head and cleaning method suitable for narrow space.The spray head includes: spray head assembly includes water pipe and at least two with water pipe communication micro electromagnetic switch valve, two micro electromagnetic switch valve valve port is respectively connected with the direct current spray head and cleaning spray head of being arranged in the same side;Cleaning spray head one end is provided with long strip-shaped water outlet, the other end is connected with micro electromagnetic switch valve through cylindrical passage;Rotating mechanism includes: bearing, installed in cleaning spray head bottom, bearing outer ring is fixedly connected with cleaning spray head;Connecting pipe, setting at the valve port of the micro electromagnetic switch valve of control cleaning spray head, the outer side of the pipe of connecting pipe and the inner wall of cylindrical passage gap fit, and bearing inner ring interference fit;Micro drive motor, located outside the micro electromagnetic switch valve of control cleaning spray head, so that cleaning spray head rotates.The present application improves the cleaning efficiency of the silicone glue filler in narrow space.

Description

Technical Field

[0001] This invention relates to the field of pipeline cleaning technology, and in particular to a nozzle and cleaning method for cleaning silicone sealant in confined spaces. Background Technology

[0002] In modern industrial production, the cleaning of equipment in special environments and confined spaces is becoming increasingly prominent. With the continuous expansion of engineering construction, various pipes, equipment, and components are increasingly appearing in special environments and confined spaces. These environments and spaces include, but are not limited to, sewers, underground pipes, and narrow exhaust ducts, often containing many difficult-to-treat dirt and deposits, such as grease, rust, and hardened crusts. Due to their limited space and difficulty in access, cleaning them presents a significant challenge.

[0003] Cleaning in special environments and confined spaces remains a highly complex and dangerous task. For example, in nuclear power plants and other nuclear energy sectors, equipment requires frequent cleaning and maintenance to ensure its normal operation. In such cases, personnel need to enter high-radiation areas for cleaning and maintenance, but traditional cleaning methods expose personnel to high radiation, posing a significant risk of harm. High-pressure water jet cleaning technology for special environments and confined spaces avoids this need, protecting the health and safety of workers. In recent years, with increasing demands for cleaning quality and efficiency across industries, high-pressure water jet cleaning technology has been widely applied and promoted. For example, it is used in nuclear power plants, food processing, pharmaceutical manufacturing, and aerospace industries for equipment cleaning and maintenance. Therefore, researching high-pressure water jet cleaning technology for special environments and confined spaces is of great significance for promoting the development of my country's industrial production, improving cleaning efficiency and quality, and protecting the environment.

[0004] The interior of a nuclear power plant is divided into many areas by concrete walls. There are a large number of penetrations through the walls between these areas, and these penetrations are sealed around the walls. The sealing material is usually silicone sealant, which is a material used for radiation shielding and fireproofing.

[0005] Sometimes, to check the operational status of penetrations or inspect their welds, it is necessary to temporarily remove and clean the silicone sealant around the pipes. Nuclear power plant walls are very thick, nearly 1 meter, and the gaps between penetrations and their components and the duct walls are very small, sometimes around 20 mm. The structure of penetrations within the wall openings is quite complex, often featuring baffles and multiple stiffening plates. Due to space constraints, complex structures, and the characteristics of silicone sealant, it is difficult to clean them using mechanical methods. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a nozzle and cleaning method for cleaning silicone sealant in confined spaces, thereby improving the cleaning efficiency of silicone sealant fillers in confined spaces.

[0007] The present invention provides a silicone sealant cleaning nozzle adapted to confined spaces, comprising: a nozzle assembly, a rotating mechanism and a miniature drive motor;

[0008] The nozzle assembly includes a hollow water supply pipe threaded to the spray gun and sealed at one end, and at least two miniature electromagnetic switch valves connected sequentially to the water supply pipe. The valve ports of the two miniature electromagnetic switch valves are respectively connected to a DC nozzle and a cleaning nozzle located on the same side.

[0009] The cleaning nozzle has an elongated spray nozzle at one end and is connected to the valve port of the miniature electromagnetic switch valve through a cylindrical channel at the other end; the opening area of ​​the elongated spray nozzle is the same as the circular cross-sectional area of ​​the cylindrical channel.

[0010] The rotating mechanism includes: a bearing installed at the bottom of the cleaning nozzle, wherein the outer ring of the bearing is fixedly connected to the cleaning nozzle;

[0011] A connecting pipe is installed at the valve port of the miniature electromagnetic switch valve that controls the cleaning nozzle. The outer side of the connecting pipe is clearance-fitted with the inner wall of the cylindrical channel, and the connecting pipe is interference-fitted with the inner ring of the bearing.

[0012] A miniature drive motor is located outside the miniature electromagnetic switch valve that controls the cleaning nozzle, and drives the cleaning nozzle to rotate via gears.

[0013] As a further technical solution, the miniature electromagnetic switching valve includes a first miniature electromagnetic switching valve and a second miniature electromagnetic switching valve.

[0014] The first miniature electromagnetic switch valve is located near the end of the water supply pipe, and its valve port is connected to the cleaning nozzle.

[0015] A micro drive motor is fixedly installed on the side of the first micro electromagnetic switch valve away from the second micro electromagnetic switch valve. The output end of the micro drive motor is located on the upper side and is connected to a drive gear. The cleaning nozzle is rotatably connected to the valve port of the corresponding micro electromagnetic switch valve through a rotating mechanism. The outer ring of the cleaning nozzle is fixedly provided with a driven tooth that meshes with the drive gear.

[0016] The valve port of the second miniature electromagnetic switch valve is connected to a DC nozzle.

[0017] As a further technical solution, the width of the miniature electromagnetic switch valve is less than 20mm.

[0018] As a further technical solution, the end of the connecting pipe is provided with an axial cut, and the outer ring of the end is provided with a guide extrusion step. The bottom of the guide extrusion step is flat and has an arc-shaped chamfer at the intersection with the cut. The cylindrical channel of the cleaning nozzle is provided with a positioning groove in the middle. A hard graphite gasket is installed on the bottom surface of the positioning groove. After installation, the bottom surface of the guide extrusion step contacts the upper side surface of the hard graphite gasket.

[0019] As a further technical solution, a sealing groove is provided on the cylindrical channel wall between the positioning groove and the bottom of the cylindrical channel, and a sealing ring is filled in the sealing groove.

[0020] As a further technical solution, a buffer cavity is provided between the elongated water nozzle and the cylindrical channel. The buffer cavity consists of a longitudinal buffer space extending outward from the top of the cylindrical channel along the length of the elongated water nozzle and a transverse buffer space extending outward from the top of the cylindrical channel along the width of the elongated water nozzle.

[0021] As a further technical solution, the walls of the buffer cavity are all outwardly expanding arc surfaces, and the top of the arc surface is the long side and wide side of the elongated water nozzle.

[0022] As a further technical solution, the error between the opening area of ​​the elongated spray nozzle and the circular cross-sectional area of ​​the cylindrical channel is within 2% of the circular cross-sectional area.

[0023] This invention provides a dual-nozzle high-pressure water gun, including the silicone cleaning nozzles adapted to confined spaces as described in the above technical solution.

[0024] This invention provides a cleaning method for the dual-nozzle high-pressure water gun described in the above technical solution, comprising the following steps:

[0025] Step 1: First, clean the silicone sealant in the spacious areas, leaving the silicone sealant filling the more difficult-to-clean penetrating areas, narrow areas, and hidden areas. Drill holes to pre-treat the silicone sealant in the penetrating areas to create water wedge inlets, and seal the openings of the penetrating areas with plastic sheets on the side that has not yet been cleaned.

[0026] Step 2: Use a high-pressure water jet gun, a thin rod gun, and the dual-nozzle high-pressure water gun to clean the silicone sealant in the penetrating areas, narrow areas, and hidden areas.

[0027] Compared with the prior art, the silicone sealant cleaning nozzle and cleaning method of the present invention, which are adapted to confined spaces, have the following beneficial effects:

[0028] (1) By setting a miniature electromagnetic switch valve to control the switching of the DC nozzle and the cleaning nozzle, the problem of not being able to use a long drill rod to drill the water wedge inlet can be solved when cleaning silicone sealant in hidden areas. The high-pressure water flow generated by the DC nozzle establishes a water wedge inlet at close range. At the same time, the high-pressure direct water flow can also damage the internal structure of the silicone sealant during the formation of the water wedge inlet, thus creating more favorable cleaning conditions for subsequent cleaning nozzle operations. The area of ​​the elongated nozzle is the same as the cross-section of the initial cylindrical channel of the nozzle. This helps to make the water pressure of the elongated nozzle closer to the set value while controlling the water pressure, making it easier for operators to use. The setting of the buffer cavity provides a stable water pressure for the elongated nozzle, avoiding the problem of excessive pressure change when directly transitioning from the cylindrical outlet to the elongated nozzle, further improving the cleaning effect. The elongated nozzle has a wide cleaning range and is more efficient for cleaning silicone sealant whose internal structure has been damaged.

[0029] (2) By setting the cleaning nozzle to a rotatable nozzle, the high-pressure water jet sprayed during rotation forms a spiral shape, which has a wider impact range on silicone sealant, and the continuous water flow can continuously damage its structure. For hard-to-clean areas such as corners, this larger cleaning range can achieve effective cleaning. Compared with the direct spray of high-pressure water, the operation is simpler and does not require precise aiming at corners. It has a more convenient and efficient cleaning advantage when cleaning hidden areas and when the field of vision is almost zero. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the nozzle part of the dual-nozzle spray gun of the present invention.

[0031] Figure 2 This is a cross-sectional view of the installation structure of the cleaning nozzle and connecting pipe of the present invention.

[0032] Figure 3 This is a front cross-sectional view of the cleaning nozzle of the present invention.

[0033] Figure 4 This is a side sectional view of the cleaning nozzle of the present invention;

[0034] In the figure, 1-water supply pipe, 2-first miniature electromagnetic switch valve, 3-DC nozzle, 4-cleaning nozzle, 5-miniature drive motor, 6-second miniature electromagnetic switch valve, 21-connecting pipe, 22-extrusion step, 41-spray nozzle, 42-buffer cavity, 43-driven gear, 44-positioning groove, 45-hard graphite gasket, 46-sealing groove, 47-sealing ring, 51-drive gear. Detailed Implementation

[0035] To further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the present invention.

[0036] like Figures 1 to 4 As shown, a silicone sealant cleaning nozzle adapted for confined spaces includes: a nozzle assembly, a rotating mechanism, and a miniature drive motor 5;

[0037] The nozzle assembly is threadedly connected to the spray gun;

[0038] The nozzle assembly includes a hollow water supply pipe 1 that is threadedly connected to the spray gun and sealed at one end, and at least two miniature electromagnetic switch valves that are connected to the water supply pipe 1 one after the other. The width of the installed miniature electromagnetic switch valve is less than 20mm. The miniature electromagnetic switch valve specifically includes a first miniature electromagnetic switch valve 2 and a second miniature electromagnetic switch valve 6. The valve port of the first miniature electromagnetic switch valve 2 is connected to a DC nozzle 3, and the second miniature electromagnetic switch valve 6 is connected to a cleaning nozzle 4. The DC nozzle 3 and the cleaning nozzle 4 are located on the same side.

[0039] The cleaning nozzle 4 is connected to the valve port of the first micro electromagnetic switch valve 2 at one end, and the channel is a cylindrical channel. The other end is opened with a long strip-shaped water nozzle 41, so that the high-pressure water jet is in the shape of a sheet. The opening area of ​​the long strip-shaped water nozzle 41 is infinitely close to the circular cross-sectional area of ​​the cylindrical channel, with an error of less than 2% of the circular cross-sectional area.

[0040] A buffer cavity 42 is provided between the elongated water nozzle 41 and the cylindrical channel. The buffer cavity 42 consists of a longitudinal buffer space that extends outward from the top of the cylindrical channel along the length of the elongated water nozzle 41 and a transverse buffer space that extends outward from the top of the cylindrical channel along the width of the elongated water nozzle 41. The walls of the buffer cavity 42 are all outwardly expanding arc surfaces, and the top of the arc surface is the long side and the wide side of the elongated water nozzle 41.

[0041] This invention controls the switching of the cleaning nozzle 4 and the DC nozzle 3 by setting a first micro electromagnetic switch valve 2 and a second micro electromagnetic switch valve 6. When cleaning silicone sealant in hidden areas, it is impossible to drill for the water wedge inlet using a long drill rod, and observation of the silicone sealant in hidden areas is inconvenient, even with an endoscope. The high-pressure water flow from the DC nozzle 3 establishes a water wedge inlet for the silicone sealant at close range. Simultaneously, the high-pressure direct water flow not only establishes the water wedge inlet but also disrupts the internal structure of the silicone sealant, thus facilitating the subsequent work of the cleaning nozzle 4. To provide a better cleaning environment, the area of ​​the elongated nozzle 41 is the same as the cross-section of the initial cylindrical channel of the nozzle. This ensures that while controlling the water pressure, the water pressure of the elongated nozzle can be closer to the adjusted water pressure, making it easier for operators to use. The buffer cavity 42 provides sufficient water pressure for the elongated nozzle, avoiding the problem of excessive pressure change when directly switching from the cylindrical outlet to the elongated nozzle, thus providing better cleaning conditions. The elongated nozzle has a large cleaning range, making it more efficient for cleaning silicone sealant that has undergone internal structural damage.

[0042] The cleaning nozzle 4 is mounted on the first micro electromagnetic switch valve 2 near the end of the water supply pipe 1. A micro drive motor 5 is fixedly mounted on the side of the first micro electromagnetic switch valve 2 away from the second micro electromagnetic switch valve 6. The output end of the micro drive motor 5 is located on the upper side and is connected to the drive gear 51. The cleaning nozzle 4 and the corresponding valve port of the first micro electromagnetic switch valve 2 are rotatably connected through a rotating mechanism. The outer ring of the cleaning nozzle 4 is fixedly provided with a driven tooth 43 that meshes with the drive gear 51.

[0043] The cleaning nozzle 4 is configured as a rotatable nozzle. When rotated, the high-pressure water jet is spiral-shaped, which has a wider impact range on the silicone sealant. The continuous water jet can continuously damage the silicone sealant structure. For hard-to-clean corners, the larger cleaning area can effectively clean the corners. Compared with the direct high-pressure water jet method, the operation of this invention is simpler, and there is no need to accurately aim at the corners. When cleaning hidden areas where the field of view is almost zero, it has the advantage of more convenient and efficient cleaning.

[0044] The rotating mechanism includes a bearing that is fixedly embedded in the bottom of the cleaning nozzle 4. The outer ring of the bearing is fixedly connected to the cleaning nozzle 4. The connecting pipe 21 at the valve port of the miniature electromagnetic switch valve 2 is interference-fitted with the inner ring of the bearing.

[0045] In order to achieve the rotation of the cleaning nozzle 4, a bearing is set so that the cleaning nozzle 4 can rotate relative to the first micro electromagnetic switch valve 2 without affecting the water output.

[0046] The rotating mechanism includes a connecting pipe 21 fixedly installed at the valve port of the first micro electromagnetic switch valve 2. The outer side of the connecting pipe 21 is clearance-fitted with the inner wall of the cylindrical channel. An axial cut is provided at the end of the connecting pipe 21, and a guide extrusion step 22 is provided on the outer ring of the end. The bottom of the guide extrusion step 22 is flat and has an arc-shaped chamfer at the intersection with the cut. A positioning groove 44 is provided in the middle of the cylindrical channel of the cleaning nozzle 4. A hard graphite gasket 45 is installed on the bottom surface of the positioning groove 44. After installation, the bottom surface of the guide extrusion step 22 contacts the upper side surface of the hard graphite gasket 45.

[0047] The connecting pipe 21 with an axial cut undergoes slight deformation during installation due to inward compression on both sides. When the guide compression step 22 moves to the positioning groove 44, it expands to both sides and gets stuck in the positioning groove 44. The hard graphite gasket 45 provides rotational lubrication and initial sealing. When the cleaning nozzle 4 is working, the high-pressure water flow pushes the nozzle upward, making the connection between the bottom of the guide compression step and the hard graphite gasket 45 tighter, achieving self-sealing during operation. During rotation, the characteristics of the hard graphite gasket 45 provide a certain sealing effect for the connection surface and also provide lubrication for the rotation of the cleaning nozzle 4. To facilitate the installation of the hard graphite gasket 45, the nozzle adopts a combined structure. The upper part is the buffer cavity 42 of the nozzle, and the lower part is a two-half spliced ​​structure, which is fixed together by slender bolts. The connection surfaces are equipped with seals or multiple embedded structures for sealing to adapt to the high-pressure environment.

[0048] A sealing groove 46 is provided on the cylindrical channel wall between the positioning groove 44 and the bottom of the cylindrical channel, and a sealing ring 47 is filled in the sealing groove 46.

[0049] To further enhance the seal between the connecting pipe 21 and the cleaning nozzle 4, a sealing ring 47 and a sealing groove 46 are provided. After installation, the connecting pipe 21 compresses the sealing ring 47, causing the sealing ring 47 to deform and thus achieve a sealing effect.

[0050] An embodiment of the present invention also discloses a dual-nozzle high-pressure water gun, including the silicone cleaning nozzle adapted for confined spaces as described in the above technical solution. A switching switch for controlling the on / off state of a miniature electromagnetic valve is provided on the spray gun handle.

[0051] A silicone sealant cleaning process suitable for confined spaces includes the following steps:

[0052] Cleaning zones are defined based on the location of the silicone sealant filling the through-hole, including the wide area between the partition and the exterior wall, the through-hole area filled with the through-hole, the narrow area between the partition and the inner side of the wall, and the hidden area between the front and rear partitions.

[0053] Step 1: First, clean the silicone sealant in the spacious areas, leaving the silicone sealant filling the more difficult-to-clean penetrating areas, narrow areas, and hidden areas. Drill holes in the silicone sealant in the penetrating areas to create water wedge inlets. On the side that has not been cleaned yet, use a plastic plate to seal the opening of the penetrating area to prevent water from splashing.

[0054] Step 2: Use a high-pressure water jet direct spray gun, a thin rod direct spray gun, and the dual-nozzle high-pressure water gun described in the above technical solution to clean the silicone sealant in the penetrating area, narrow area, and hidden area respectively;

[0055] The wastewater generated is collected and filtered through a wastewater collection and treatment system, and the filtered water is then transported to a high-pressure water tank for reuse.

[0056] Step 2 specifically involves:

[0057] Step 2.1: Cleaning the silicone sealant on both sides of the partition: Use a long drill rod to drill holes evenly in the silicone sealant filling space of the penetrating area to disrupt the silicone sealant's molding state and provide water wedge inlets for hydraulic flushing; drill at least four water wedge inlets distributed near the four corners, and use a high-pressure water jet direct spray gun to clean the silicone sealant or dirt around the penetrating part, starting from both the inside and outside of the wall. When cleaning one side, use a plastic board to shield the other side to prevent water splashing, remove the silicone sealant in the penetrating area, and open up the inside and outside;

[0058] Step 2.2 Cleaning the silicone sealant on both sides of the partition: Use a long drill rod to drill holes evenly in the silicone sealant between the partition and the wall on both sides. Use a thin-barreled spray gun to reach into the gaps around the iron plate and clean the silicone sealant around the iron plate.

[0059] Step 2.3, Cleaning the silicone sealant between the partitions: Insert the dual-nozzle high-pressure water gun into either side of the cleaned partition, adjust the water pressure to the maximum value, first open the second micro electromagnetic switch valve 6 controlling the DC nozzle 3, the high-pressure water jet from the DC nozzle 3 will create water wedge holes in the silicone sealant, repeat the operation at different heights and depths, creating at least four water wedge holes distributed near the four corners, then adjust the water pressure to the water pressure used in steps 1 and 2 when cleaning with the high-pressure water jet direct spray gun and the thin rod direct spray gun, switch the micro electromagnetic switch valve controlling the cleaning nozzle 4 and the second micro drive motor 6, close the second micro electromagnetic switch valve 6, and the cleaning nozzle 4 will rotate and spray a spiral high-pressure water jet, starting from the water wedge holes created by the DC nozzle 3, and perform multi-directional reciprocating motion to thoroughly clean the silicone sealant between the partitions.

[0060] The cleaning process also includes the following aspects: pressurizing the cleaning water: the cleaning water in the high-pressure pump tank is transmitted to the high-pressure pump through the pre-pump, the spray gun is connected to the outlet of the high-pressure pump, and the cleaning can begin when the spray gun is turned on; the spray gun refers to a high-pressure water jet direct spray gun, a thin rod direct spray gun, or a dual-nozzle high-pressure water gun;

[0061] Wastewater collection: Install a waterproof splash cover with upper and lower sections on the outside of the wall in the penetrating area. The bottom of the waterproof splash cover has a water outlet, and the upper side has a spray gun working window. The water outlet is connected to the on-site water tank through a water pipe.

[0062] Multi-stage filtration of wastewater: The wastewater in the on-site water tank is filtered by a diaphragm pump through a bag filter and a rod filter. The filtered cleaning water is then sent to the high-pressure pump water tank for reuse.

[0063] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A nozzle for cleaning silicone sealant in confined spaces, characterized in that, include: Nozzle assembly, rotating mechanism and micro drive motor (5); The nozzle assembly includes a hollow water supply pipe (1) that is threaded to the spray gun and sealed at one end, and at least two miniature electromagnetic switch valves that are connected to the water supply pipe (1) one after the other. The valve ports of the two miniature electromagnetic switch valves are respectively connected to a DC nozzle (3) and a cleaning nozzle (4) located on the same side. The cleaning nozzle (4) has a long strip-shaped water nozzle (41) at one end and is connected to the valve port of the micro electromagnetic switch valve through a cylindrical channel at the other end. The opening area of ​​the elongated spray nozzle (41) is the same as the circular cross-sectional area of ​​the cylindrical channel; The rotating mechanism includes: a bearing installed at the bottom of the cleaning nozzle (4), wherein the outer ring of the bearing is fixedly connected to the cleaning nozzle (4); The connecting pipe (21) is set at the valve port of the miniature electromagnetic switch valve that controls the cleaning nozzle (4). The outer side of the connecting pipe (21) is clearance-fitted with the inner wall of the cylindrical channel, and the connecting pipe (21) is interference-fitted with the inner ring of the bearing. A miniature drive motor (5) is located outside the miniature electromagnetic switch valve that controls the cleaning nozzle (4), and drives the cleaning nozzle (4) to rotate via gears.

2. The silicone sealant cleaning nozzle according to claim 1, characterized in that, The miniature electromagnetic switch valve includes a first miniature electromagnetic switch valve (2) and a second miniature electromagnetic switch valve (6). The first miniature electromagnetic switch valve (2) is located near the end of the water supply pipe (1), and its valve port is connected to the cleaning nozzle (4). A micro drive motor (5) is fixedly installed on the side of the first micro electromagnetic switch valve (2) away from the second micro electromagnetic switch valve (6). The output end of the micro drive motor (5) is located on the upper side and is connected to a drive gear (51). The cleaning nozzle (4) is rotatably connected to the valve port of the corresponding micro electromagnetic switch valve (2) through a rotating mechanism. The outer ring of the cleaning nozzle (4) is fixedly provided with a driven tooth (43) that meshes with the drive gear (51). The valve port of the second miniature electromagnetic switch valve (6) is connected to the DC nozzle (3).

3. The silicone sealant cleaning nozzle according to claim 1, characterized in that, The width of the miniature electromagnetic switch valve is less than 20mm.

4. The silicone sealant cleaning nozzle according to claim 1, characterized in that, The end of the connecting pipe (21) is provided with an axial cut, and the outer ring of the end is provided with a guide extrusion step (22). The bottom of the guide extrusion step (22) is flat and has an arc chamfer at the intersection with the cut. The cylindrical channel of the cleaning nozzle (4) is provided with a positioning groove (44). A hard graphite gasket (45) is installed on the bottom surface of the positioning groove (44). After installation, the bottom surface of the guide extrusion step (22) contacts the upper side surface of the hard graphite gasket (45).

5. The silicone sealant cleaning nozzle according to claim 4, characterized in that, A sealing groove (46) is provided on the cylindrical channel wall between the positioning groove (44) and the bottom of the cylindrical channel, and a sealing ring (47) is filled in the sealing groove (46).

6. The silicone sealant cleaning nozzle according to claim 1, characterized in that, A buffer cavity (42) is provided between the elongated nozzle (41) and the cylindrical channel. The buffer cavity (42) consists of a longitudinal buffer space that extends outward from the top of the cylindrical channel along the length of the elongated nozzle (41) and a transverse buffer space that extends outward from the top of the cylindrical channel along the width of the elongated nozzle (41).

7. The silicone sealant cleaning nozzle according to claim 6, characterized in that, The walls of the buffer cavity (42) are all outwardly expanding arc surfaces, and the top of the arc surface is the long side and the wide side of the elongated water nozzle (41).

8. A dual-nozzle high-pressure water gun, characterized in that, Includes the silicone sealant cleaning nozzle adapted for confined spaces as described in any one of claims 1 to 7.

9. A cleaning method based on the dual-nozzle high-pressure water gun of claim 8, characterized in that, Includes the following steps: Step 1: First, clean the silicone sealant in the spacious areas, leaving the silicone sealant filling the more difficult-to-clean penetrating areas, narrow areas, and hidden areas. Drill holes to pre-treat the silicone sealant in the penetrating areas to create water wedge inlets, and seal the openings of the penetrating areas with plastic sheets on the side that has not yet been cleaned. Step 2: Use a high-pressure water jet direct spray gun, a thin rod direct spray gun, and the dual-nozzle high-pressure water gun as described in claim 8 to clean the penetrating area, narrow area, and hidden area with silicone sealant.

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