A shot blasting cleaning device for steel structures

Abstract

This utility model belongs to the field of steel structure manufacturing technology, and in particular, it is a shot blasting cleaning device for steel structures. Addressing the problem that shot blasting is prone to spillage and waste during manual unloading, leading to increased shot loss and affecting cleaning efficiency, the following solution is proposed: It includes a transport frame and a loading box fixedly installed on the front side of the transport frame; a sealing door rotatably installed on the top front side of the loading box; a collection box fixedly installed on the left side of the transport frame; a support frame fixedly installed at the top center of the transport frame; a cleaning box fixedly installed at the top center of the support frame; a pushing mechanism located on the front side of the transport frame for pushing in the shot blasting; a loading and opening mechanism located on the front side of the transport frame for loading and opening the loading box; and a transport mechanism located on the top of the transport frame for transporting the shot blasting. This utility model can automatically unload the shot blasting, avoiding spillage and waste, and improving cleaning efficiency.

Description

Technical Field

[0001] This application relates to the field of steel structure manufacturing technology, and in particular to a shot blasting cleaning device for steel structures. Background Technology

[0002] A shot blasting machine is a machine that uses mechanical methods to propel shot at high speed and a certain angle onto a working surface. While blasting the shot, the machine also collects the shot that has been thrown out. However, dust and impurities remain on the surface of the collected shot, affecting its next use. Therefore, a steel structure shot blasting cleaning device is needed to clean the collected shot.

[0003] In existing technologies, during manual feeding, shot blasting is prone to spillage and waste, leading to increased shot blasting losses and thus affecting the cleaning effect. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of shot blasting during manual feeding, which easily leads to spillage and waste, resulting in increased shot blasting loss and affecting the cleaning effect. Therefore, a steel structure shot blasting cleaning device is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A shot blasting cleaning device for steel structures, comprising:

[0007] The transport frame and the loading box fixedly installed on the front side of the transport frame;

[0008] A sealed door is rotatably mounted on the front top of the feeding box;

[0009] The collection box is fixedly installed on the left side of the transport frame;

[0010] The support frame is fixedly installed at the center of the top of the transport frame;

[0011] The cleaning box is fixedly installed at the center of the top of the support frame;

[0012] The pushing mechanism, located at the front of the transport frame, is used to push the shot blasting material in.

[0013] The loading and opening mechanism is located on the front side of the transport frame and is used for loading and opening the shot blasting mechanism;

[0014] The transport mechanism, located on top of the transport frame, is used to transport shot blasting material.

[0015] A blocking mechanism is installed on the transport frame;

[0016] The cleaning and swinging mechanism, located on top of the transport frame, is used for cleaning and swinging the shot blasting material.

[0017] Preferably, the pushing mechanism includes a hydraulic cylinder one disposed on the front side of the feeding box, a push plate fixedly mounted on the output shaft of the hydraulic cylinder one, a baffle fixedly mounted on the top of the push plate, a cavity provided inside the feeding box, the top side of the baffle slidably connected to the cavity, a hydraulic cylinder two disposed on the bottom side inside the feeding box, a pushing plate fixedly mounted on the output shaft of the hydraulic cylinder two, both sides of the pushing plate slidably connected to the cavity, a through hole provided on the rear side of the feeding box, a sliding plate fixedly mounted on the rear side of the feeding box, and the bottom side of the sliding plate fixedly connected to the top side of the transport frame.

[0018] Preferably, the feeding opening mechanism includes a groove disposed inside the feeding box, a hydraulic cylinder three disposed on the inner wall of the groove, an L-block one fixedly mounted on the output shaft of the hydraulic cylinder three, a sealing plate one fixedly mounted on the top of the L-block one, the two sides of the sealing plate one being slidably connected to the groove and the through hole, one side of the L-block one being slidably connected to the groove, and a rack fixedly mounted on the right side of the L-block one, the rack being meshed with a gear one.

[0019] Preferably, a rotating shaft is fixedly mounted on the gear one, the outer surface of the rotating shaft is rotatably connected to the groove, a first sprocket is fixedly mounted on the outer surface of the rotating shaft, the first sprocket meshes with a chain, the chain meshes with a second sprocket, a rotating rod is fixedly mounted on the second sprocket, the outer surface of the rotating rod is rotatably connected to the interior of the feeding box, a first bevel gear is fixedly mounted on the outer surface of the rotating rod, the first bevel gear meshes with a second bevel gear, a screw is fixedly mounted on the second bevel gear, the outer surface of the screw is rotatably connected to the interior of the feeding box, an L-block two is threadedly connected to the outer surface of the screw, the L-block two is slidably connected to the interior of the feeding box, a sealing plate two is fixedly mounted on the bottom of the L-block two, and both sides of the sealing plate two are slidably connected to the interior of the feeding box.

[0020] Preferably, the transport mechanism includes multiple rotating rods rotatably mounted on the top of the transport frame, each of the multiple rotating rods having a roller fixedly mounted on its outer surface, and each of the multiple rotating rods having a gear fixedly mounted on its outer surface. A support plate is provided on the rear side of the transport frame, and a drive motor is provided on the top of the support plate. The output shaft of the drive motor is fixedly connected to one of the rotating rods.

[0021] Preferably, the blocking mechanism includes multiple springs fixedly installed inside the front side of the transport frame, each of the multiple springs having a damper fixedly installed on its front side, and each of the multiple dampers having the same blocking plate fixedly installed on its front side.

[0022] Preferably, the cleaning swing mechanism includes a second drive motor disposed inside the cleaning box. The output shaft of the second drive motor is fixedly mounted with a fan blade and a third bevel gear. The third bevel gear meshes with a fourth bevel gear. A rotating shaft is fixedly mounted at the bottom of the fourth bevel gear. The outer surface of the rotating shaft is rotatably connected to the cleaning box and the support frame. A fifth bevel gear is fixedly mounted on the outer surface of the rotating shaft.

[0023] Preferably, the fifth bevel gear meshes with a sixth bevel gear, a threaded rod is fixedly installed on the sixth bevel gear, the outer surface of the threaded rod is rotatably connected to the interior of the support frame, a connecting block is threadedly connected to the outer surface of the threaded rod, the four sides of the connecting block are slidably connected to the interior of the support frame, a hose is fixedly installed at the bottom of the support frame, a nozzle is fixedly installed at the bottom end of the hose, and the rear side of the nozzle is fixedly connected to the front side of the connecting block.

[0024] The beneficial effects of the steel structure shot blasting cleaning device described in this utility model are as follows:

[0025] Because of the push-in mechanism, the push plate simultaneously moves the baffle forward. During the push-in process, the baffle acts as a barrier to prevent the shot from falling down. Once the shot is successfully pushed onto the push-in plate, hydraulic cylinder two is activated, and its output shaft pushes the push-in plate upward.

[0026] Because of the feeding and opening mechanism, L-block 1 will simultaneously drive sealing plate 1 and rack 2 to move downward, thereby opening sealing plate 1. L-block 2 will drive sealing plate 2 to move downward, thereby closing sealing plate 2. The shot is pushed onto the through hole, and the shot falls onto the slide plate through the through hole, and then slides down the slide plate onto the roller. Through the opening and closing operation of the sealing plate, and the smooth sliding of the shot on the slide plate and roller;

[0027] Because of the included transport mechanism, the power from the motor can be effectively transmitted to each roller, ensuring the smoothness and continuity of the shot blasting transport process and reducing interruptions or jams caused by unstable power transmission.

[0028] Because of the blocking mechanism, the combination of the blocking plate and the spring can effectively buffer the impact force of the shot falling, reduce the damage to the shot, and ensure the integrity and performance of the shot.

[0029] Because of the cleaning swing mechanism, the fan blades rotate to generate wind, which blows away the remaining shot on the shot blasting surface to improve the cleanliness of the workpiece surface. The air enters the hose after being filtered by the filter screen, and then enters the nozzle through the hose, and finally sprays out from the nozzle. In conjunction with the blowing of the fan blades, it can remove impurities and residues from the surface, ensuring that the workpiece surface reaches a high cleanliness standard.

[0030] This invention enables automatic feeding of shot blasting material, avoiding spillage and waste, and improving cleaning efficiency. Attached Figure Description

[0031] Figure 1 This is a front view structural schematic diagram of a steel structure shot blasting cleaning device proposed in this utility model;

[0032] Figure 2 This is a top view of the steel structure shot blasting cleaning device proposed in this utility model;

[0033] Figure 3 This is a right-side structural schematic diagram of a steel structure shot blasting cleaning device proposed in this utility model;

[0034] Figure 4 This utility model proposes a shot blasting cleaning device for steel structures. Figure 3 Enlarged structural diagram of section A;

[0035] Figure 5 This utility model proposes a shot blasting cleaning device for steel structures. Figure 3 Enlarged structural diagram of section B;

[0036] Figure 6 This utility model proposes a shot blasting cleaning device for steel structures. Figure 1 Enlarged structural diagram of section C;

[0037] Figure 7 This is a three-dimensional structural diagram of a steel structure shot blasting cleaning device proposed in this utility model.

[0038] Reference numerals: 1. Transport frame; 2. Feeding box; 3. Collection box; 4. Support frame; 5. Cleaning box; 6. Hose; 7. Nozzle; 8. Roller; 9. Rotating rod; 10. Gear II; 11. Drive motor I; 12. Push plate; 13. Baffle; 14. Push-in plate; 15. Slide plate; 16. Spring; 17. Block; 18. Screw; 19. L-block II; 20. Sealing plate II; 21. Second bevel gear; 22. First bevel gear; 23. Rotating rod; 24. Second sprocket; 25. Chain; 26. First sprocket; 27. Rotating shaft; 28. Gear I; 29. ​​Rack; 30. L-block I; 31. Sealing plate I; 32. Drive motor II; 33. Fan blade; 34. Third bevel gear; 35. Fourth bevel gear; 36. Rotating shaft; 37. Fifth bevel gear; 38. Sixth bevel gear; 39. Threaded rod. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0040] Example 1

[0041] Reference Figures 1-7 A shot blasting cleaning device for steel structures, comprising:

[0042] Transport frame 1 and loading box 2 fixedly installed on the front side of transport frame 1;

[0043] A sealed door is rotatably mounted on the front top of the feeding box 2;

[0044] Collection box 3 is fixedly installed on the left side of transport frame 1;

[0045] Support frame 4 is fixedly installed at the top center of transport frame 1;

[0046] Cleaning box 5 is fixedly installed at the top center of support frame 4;

[0047] The pushing mechanism, located on the front side of the transport frame 1, is used to push the shot blasting material in;

[0048] The loading and opening mechanism is located on the front side of the transport frame 1 and is used for loading and opening the shot blasting mechanism;

[0049] The transport mechanism, located on top of the transport frame 1, is used for transporting shot blasting material;

[0050] A blocking mechanism is installed on the transport frame 1;

[0051] The cleaning swing mechanism is located on top of the transport frame 1 and is used for cleaning and swinging the shot blasting.

[0052] In this embodiment, the pushing mechanism includes a hydraulic cylinder 1 located on the front side of the feeding box 2. A push plate 12 is fixedly installed on the output shaft of the hydraulic cylinder 1. A baffle 13 is fixedly installed on the top of the push plate 12. The feeding box 2 has an internal cavity. The top side of the baffle 13 is slidably connected to the cavity. The cavity is U-shaped. A hydraulic cylinder 2 is located on the bottom side of the feeding box 2. A pushing plate 14 is fixedly installed on the output shaft of the hydraulic cylinder 2. The two sides of the pushing plate 14 are slidably connected to the cavity. The top of the pushing plate 14 is sloping. A through hole is provided on the rear side of the feeding box 2. A sliding plate 15 is fixedly installed on the rear side of the feeding box 2. The bottom side of the sliding plate 15 is fixedly connected to the top side of the transport frame 1.

[0053] In this embodiment, the feeding opening mechanism includes a groove disposed inside the feeding box 2. A hydraulic cylinder 3 is disposed on the inner wall of the groove. An L-block 30 is fixedly installed on the output shaft of the hydraulic cylinder 3. A sealing plate 31 is fixedly installed on the top of the L-block 30. The two sides of the sealing plate 31 are slidably connected to the groove and the through hole. One side of the L-block 30 is slidably connected to the groove. A rack 29 is fixedly installed on the right side of the L-block 30. The rack 29 meshes with a gear 28.

[0054] In this embodiment, a rotating shaft 27 is fixedly installed on gear 28. The outer surface of the rotating shaft 27 is rotatably connected to the groove. A first sprocket 26 is fixedly installed on the outer surface of the rotating shaft 27. The first sprocket 26 meshes with a chain 25. The chain 25 meshes with a second sprocket 24. A rotating rod 23 is fixedly installed on the second sprocket 24. The outer surface of the rotating rod 23 is rotatably connected to the inside of the feeding box 2. A first bevel gear 22 is fixedly installed on the outer surface of the rotating rod 23. The first bevel gear 22 meshes with a second bevel gear 21. A screw 18 is fixedly installed on the second bevel gear 21. The outer surface of the screw 18 is rotatably connected to the inside of the feeding box 2. An L-block 19 is threadedly connected to the outer surface of the screw 18. The L-block 19 is slidably connected to the inside of the feeding box 2. A sealing plate 20 is fixedly installed at the bottom of the L-block 19. The two sides of the sealing plate 20 are slidably connected to the inside of the feeding box 2.

[0055] In this embodiment, the transport mechanism includes multiple rotating rods 9 rotatably mounted on the top of the transport frame 1. Rollers 8 are fixedly mounted on the outer surfaces of the multiple rotating rods 9. Gears 2 10 are fixedly mounted on the outer surfaces of the multiple rotating rods 9. The same gear 3 meshes between two adjacent gears 2 10. A support plate is provided on the rear side of the transport frame 1. A drive motor 11 is provided on the top of the support plate. The output shaft of the drive motor 11 is fixedly connected to one of the rotating rods 9.

[0056] In this embodiment, the blocking mechanism includes multiple springs 16 fixedly installed inside the front side of the transport frame 1. Each of the multiple springs 16 has a damper fixedly installed on its front side, and each of the multiple dampers has the same blocking plate 17 fixedly installed on its front side.

[0057] In this embodiment, the cleaning swing mechanism includes a second drive motor 32 disposed inside the cleaning box 5. The output shaft of the second drive motor 32 is fixedly mounted with a fan blade 33 and a third bevel gear 34. The third bevel gear 34 meshes with a fourth bevel gear 35. A rotating shaft 36 is fixedly mounted at the bottom of the fourth bevel gear 35. The outer surface of the rotating shaft 36 is rotatably connected to the cleaning box 5 and the support frame 4. A fifth bevel gear 37 is fixedly mounted on the outer surface of the rotating shaft 36.

[0058] In this embodiment, the fifth bevel gear 37 meshes with the sixth bevel gear 38, and a threaded rod 39 is fixedly installed on the sixth bevel gear 38. The outer surface of the threaded rod 39 is rotatably connected to the inside of the support frame 4. A connecting block is threadedly connected to the outer surface of the threaded rod 39. The four sides of the connecting block are slidably connected to the inside of the support frame 4. A hose 6 is fixedly installed at the bottom of the support frame 4. A nozzle 7 is fixedly installed at the bottom end of the hose 6. The rear side of the nozzle 7 is fixedly connected to the front side of the connecting block.

[0059] In this invention, during use, the sealed door is opened, and the recovered shot is poured into the loading box 2. When the shot needs to be pushed onto the push plate 14, hydraulic cylinder one is activated, and its output shaft pushes the push plate 12 forward. The push plate 12 simultaneously moves the baffle 13 forward. During the pushing process, the baffle 13 acts as a barrier to prevent the shot from falling. After the shot is successfully pushed onto the push plate 14, hydraulic cylinder two is activated, and its output shaft pushes the push plate 14 upward. When the push plate 14 moves to a certain position, it avoids the scattering and waste of shot during the loading process, improving the accuracy of loading. When it is necessary to open or close the two sealing plates, hydraulic cylinder three is activated, and its output shaft pushes block L 30 downward. Block L-30 simultaneously moves sealing plate 31 and rack 29 downwards, opening sealing plate 31. Simultaneously, the downward movement of rack 29 rotates gear 28, which in turn rotates shaft 27, which in turn rotates first sprocket 26. This rotation, via chain 25, drives second sprocket 24, which in turn rotates rod 23. Rod 23 then rotates first bevel gear 22, which in turn rotates second bevel gear 21. Second bevel gear 21 then rotates screw 18. The rotation of screw 18 causes block L-19 to move downwards, which in turn moves sealing plate 20 downwards, closing sealing plate 20 and pushing the shot blasting material onto the through hole. The shot then falls through the through hole onto the slide plate. The shot blasting material slides down onto the roller 8 via the slide plate 15. Through the opening and closing of the sealing plate and the smooth sliding of the shot blasting material on the slide plate 15 and roller 8, the shot blasting material is smoothly transported from the storage area to the subsequent processing area. During the process of the shot blasting material falling from the through-hole onto the slide plate 15, it comes into contact with the baffle plate 17. The impact force generated by the falling shot acts on the baffle plate 17, compressing the spring 16. The spring 16, after being compressed, generates a reaction force, thus blocking and buffering the shot blasting material. The shot then continues to slide down onto the roller 8. The combination of the baffle plate 17 and the spring 16 effectively buffers the impact force of the falling shot, reducing damage to the shot and ensuring the integrity and performance of the shot. When the shot needs to be transported... When the shot blasting process is initiated, the output shaft of drive motor 11 drives one of the rotating rods 9, which in turn drives one of the gears 10. Gear 10 drives gear 3 and several other gears 10, which in turn drive multiple rotating rods 9. These rotating rods 9 then drive multiple rollers 8 for transport, thus achieving the transport of the shot. This effectively transmits the motor's power to each roller 8, ensuring the smoothness and continuity of the shot blasting transport process and reducing interruptions or jams caused by unstable power transmission. When the shot reaches the bottom of the cleaning device, drive motor 32 is initiated, and its output shaft drives the fan blades 33 and the third bevel gear 34 to rotate. The rotation of the fan blades 33 generates airflow.The remaining shot on the shot-blasted surface is blown away to improve the cleanliness of the workpiece surface. Simultaneously, the third bevel gear 34 drives the fourth bevel gear 35 to rotate, which in turn drives the rotating shaft 36. The rotating shaft 36 drives the fifth bevel gear 37, which in turn drives the sixth bevel gear 38. The sixth bevel gear 38 then drives the threaded rod 39 to rotate. During the rotation of the threaded rod 39, the connecting block reciprocates, causing the nozzle 7 to reciprocate. Air, after being filtered by the filter, enters the hose 6 and then the nozzle 7, finally being sprayed out from the nozzle 7. Combined with the blowing action of the fan blades 33, this further enhances the cleaning effect, removing surface impurities and residues, ensuring the workpiece surface reaches a high cleanliness standard, and meeting the quality requirements of subsequent processing or use.

[0060] Example 2

[0061] The difference between this embodiment and Embodiment 1 is that four support legs are fixedly installed at the bottom of the transport frame 1, which can prevent the transport frame 1 from directly contacting the ground.

[0062] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A steel structure shot blasting device, characterized in that: include: Transport frame (1) and loading box (2) fixedly installed on the front side of transport frame (1); A sealed door is rotatably installed on the front top of the feeding box (2); The collection box (3) is fixedly installed on the left side of the transport frame (1); The support frame (4) is fixedly installed at the top center of the transport frame (1); Cleaning box (5) is fixedly installed at the top center of support frame (4); The pushing mechanism is located on the front side of the transport frame (1) and is used to push the shot blasting into the container. The loading and opening mechanism is located on the front side of the transport frame (1) and is used to load and open the shot blasting mechanism; The transport mechanism, located on top of the transport frame (1), is used to transport shot blasting material; A blocking mechanism is installed on the transport frame (1); The cleaning swing mechanism is located on top of the transport frame (1) and is used to clean and swing the shot blasting.

2. A steel structure shot blasting device according to claim 1, characterized in that: The pushing mechanism includes a hydraulic cylinder one located on the front side of the loading box (2), a push plate (12) fixedly mounted on the output shaft of the hydraulic cylinder one, a baffle (13) fixedly mounted on the top of the push plate (12), a cavity is provided inside the loading box (2), the top side of the baffle (13) is slidably connected to the cavity, a hydraulic cylinder two is provided on the bottom side inside the loading box (2), a pushing plate (14) is fixedly mounted on the output shaft of the hydraulic cylinder two, the two sides of the pushing plate (14) are slidably connected to the cavity, a through hole is provided on the rear side of the loading box (2), a sliding plate (15) is fixedly mounted on the rear side of the loading box (2), and the bottom side of the sliding plate (15) is fixedly connected to the top side of the transport frame (1).

3. A steel structure shot blasting device according to claim 1, characterized in that: The feeding opening mechanism includes a groove inside the feeding box (2). A hydraulic cylinder is provided on the inner wall of the groove. An L block (30) is fixedly installed on the output shaft of the hydraulic cylinder. A sealing plate (31) is fixedly installed on the top of the L block (30). The two sides of the sealing plate (31) are slidably connected to the groove and the through hole. One side of the L block (30) is slidably connected to the groove. A rack (29) is fixedly installed on the right side of the L block (30). A gear (28) meshes with the rack (29).

4. A steel structure shot blasting device according to claim 3, characterized in that: A rotating shaft (27) is fixedly mounted on the gear (28). The outer surface of the rotating shaft (27) is rotatably connected to the groove. A first sprocket (26) is fixedly mounted on the outer surface of the rotating shaft (27). The first sprocket (26) meshes with a chain (25). The chain (25) meshes with a second sprocket (24). A rotating rod (23) is fixedly mounted on the second sprocket (24). The outer surface of the rotating rod (23) is rotatably connected to the inside of the feeding box (2). A first bevel gear is fixedly mounted on the outer surface of the rotating rod (23). 22), the first bevel gear (22) meshes with the second bevel gear (21), and a screw (18) is fixedly installed on the second bevel gear (21). The outer surface of the screw (18) is rotatably connected to the inside of the feeding box (2). The outer surface of the screw (18) is threadedly connected to the L block two (19). The L block two (19) is slidably connected to the inside of the feeding box (2). The bottom of the L block two (19) is fixedly installed with the sealing plate two (20). The two sides of the sealing plate two (20) are slidably connected to the inside of the feeding box (2).

5. A steel structure shot blasting device as claimed in claim 1, wherein: The transport mechanism includes multiple rotating rods (9) rotatably mounted on the top of the transport frame (1). Rollers (8) are fixedly mounted on the outer surfaces of the multiple rotating rods (9). Gears (10) are fixedly mounted on the outer surfaces of the multiple rotating rods (9). A support plate is provided on the rear side of the transport frame (1). A drive motor (11) is provided on the top of the support plate. The output shaft of the drive motor (11) is fixedly connected to one of the rotating rods (9).

6. The steel structure shot blasting cleaning device according to claim 1, characterized in that: The blocking mechanism includes multiple springs (16) fixedly installed inside the front side of the transport frame (1), each of the multiple springs (16) having a damper fixedly installed on its front side, and each of the multiple dampers having the same blocking plate (17) fixedly installed on its front side.

7. A steel structure shot blasting device as claimed in claim 1, wherein: The cleaning swing mechanism includes a second drive motor (32) disposed inside the cleaning box (5). The output shaft of the second drive motor (32) is fixedly mounted with a fan blade (33) and a third bevel gear (34). The third bevel gear (34) meshes with a fourth bevel gear (35). A rotating shaft (36) is fixedly mounted at the bottom of the fourth bevel gear (35). The outer surface of the rotating shaft (36) is rotatably connected to the cleaning box (5) and the support frame (4). A fifth bevel gear (37) is fixedly mounted on the outer surface of the rotating shaft (36).

8. A steel structure shot blasting device according to claim 7, characterized in that: The fifth bevel gear (37) meshes with the sixth bevel gear (38), and a threaded rod (39) is fixedly installed on the sixth bevel gear (38). The outer surface of the threaded rod (39) is rotatably connected to the inside of the support frame (4). A connecting block is threadedly connected to the outer surface of the threaded rod (39). The four sides of the connecting block are slidably connected to the inside of the support frame (4). A hose (6) is fixedly installed at the bottom of the support frame (4). A nozzle (7) is fixedly installed at the bottom end of the hose (6). The rear side of the nozzle (7) is fixedly connected to the front side of the connecting block.

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