Tunnel support concrete guniting device capable of effectively reducing water pollution source

Abstract

The invention relates to a tunnel support concrete guniting device capable of effectively reducing water pollution sources, and belongs to the technical field of tunnel construction machinery. The telescopic frame capable of moving transversely, the foldable second supporting frame and the turnover first supporting frame are used in cooperation with the first hydraulic cylinder, the transverse adjusting function of the device is achieved, the device can adapt to tunnels of different sizes and shapes, the collecting range of concrete rebound materials is expanded, meanwhile, the device is convenient to transport and store, and the device is convenient to use. The universality and the flexibility of the device are improved; by arranging a plurality of recycling structures of the first material collecting plate, the second material collecting plate and the collecting tank, concrete springback materials falling in the guniting operation can be comprehensively collected, the concrete springback materials are prevented from making contact with crack water at the bottom of a tunnel, the influence of alkaline admixtures on the PH value of a water body is remarkably reduced, water pollution sources are effectively reduced, and the sewage treatment difficulty is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel construction machinery, and in particular relates to a tunnel support concrete spraying device which can effectively reduce water pollution sources. Background Art

[0002] With the rapid development of the national transportation industry, highway construction projects are increasing. However, the western region, dominated by mountainous and canyon terrain, has also seen an increase in tunnel construction. Currently, tunnel construction in these areas primarily relies on explosive blasting. Due to the high mountains and deep valleys, abundant mountain water, and fragile ecological environment, the process of tunnel drilling and blasting, as well as the excavation of rock and soil, produces large amounts of fissure water that needs to be drained out of the tunnel.

[0003] However, when concrete shotcreting is being carried out in the tunnel, the concrete rebound material produced falls directly to the ground. The alkaline admixtures in the fallen shotcrete will affect the pH value of the water, causing the water to become turbid and polluting the water flowing out of the tunnel. A large amount of chemicals are needed to treat the sewage, which greatly increases the difficulty of subsequent water treatment. Summary of the Invention

[0004] In order to overcome the problem in the background technology that during the concrete spraying operation in the tunnel, the concrete rebound material generated directly falls to the ground, and the alkaline admixtures in the fallen spraying materials affect the pH value of the water body, causing the water body to be turbid, so that the water body flowing out of the tunnel is polluted, and a large amount of chemicals are needed to treat the sewage, which greatly increases the difficulty of subsequent water treatment. The present invention provides a tunnel support concrete spraying device that effectively reduces the source of water pollution; through the laterally movable telescopic frame, the foldable second support frame and the flippable first support frame, and in conjunction with the first hydraulic cylinder, the lateral adjustment function of the device is realized, which can adapt to tunnels of different sizes and shapes, expand the collection range of concrete rebound material, and facilitate the transportation and storage of the device, thereby improving the versatility and flexibility of the device; by providing multiple recovery structures of the first collecting plate, the second collecting plate and the collecting trough, the concrete rebound material dropped during the spraying operation can be fully collected to prevent it from directly contacting the fissure water at the bottom of the tunnel, significantly reducing the impact of the alkaline admixture on the pH value of the water body, effectively reducing the source of water pollution, and reducing the difficulty of sewage treatment.

[0005] To achieve the above-mentioned objectives, the present invention is implemented through the following technical solutions: a tunnel support concrete spraying device that effectively reduces water pollution sources mainly includes a movable bracket, a telescopic bracket, a first support bracket, a first aggregate plate, a spraying mechanism, a collecting trough, a second aggregate plate, a first hydraulic cylinder, a second hydraulic cylinder, and a second support bracket, wherein the movable bracket is slidably installed with a transversely movable telescopic bracket on both sides, the movable bracket is installed with a second hydraulic cylinder for driving the telescopic bracket to move transversely, the telescopic bracket is hinged with a first support bracket that can be flipped up and down, the first aggregate plate is installed on the top of the first support bracket, one end of the first hydraulic cylinder is hinged on the movable bracket, and the other end is hinged on the first support bracket; a foldable second support bracket is hinged between the telescopic brackets, the second aggregate plate is installed on the second support bracket, the collecting trough is installed on the telescopic bracket, and is located between the first aggregate plate and the second aggregate plate, and the top of the movable bracket is installed with a spraying mechanism that can spray concrete at multiple angles. The spraying mechanism comprises a support arm, a big arm, a small arm, a third hydraulic cylinder, a second motor, a spraying assembly, a fourth hydraulic cylinder, a third motor, an L-shaped connecting plate, a fourth motor, a driving gear, a driven gear, and a support plate; a support plate is installed on the top of the movable bracket, and the bottom end of the support arm is rotatably mounted on the support plate, the second motor is mounted on the bottom end of the support plate and is transmission-connected with the rotating shaft at the bottom end of the support arm, one end of the big arm is hinged on the support arm, and the other end is equipped with a retractable small arm, the support arm is hinged with a third hydraulic cylinder for driving the big arm to swing up and down, and the big arm is equipped with a fourth hydraulic cylinder for driving the small arm to be retracted, the third motor is installed at the end of the small arm through a fixing member, an L-shaped connecting plate is installed on the output shaft of the third motor, and the fourth motor is installed on the L-shaped connecting plate, and a driving gear is installed on its output shaft, and the driven gear is mounted on the L-shaped connecting plate through a connecting shaft and meshes with the driving gear, and a support plate is installed on the end surface of the driven gear, and the spraying assembly is installed on the support plate and connected to the concrete pump through a feed pipe.

[0006] The movable bracket is provided with two square tube support beams, each of which has grooves at its four corners, and a plurality of balls are embedded in the grooves. The telescopic section of the telescopic frame is slidably inserted into the square tube support beam and in rolling contact with the balls.

[0007] A plurality of vibration motors are installed at the bottom of the first material collecting plate and the bottom of the second material collecting plate.

[0008] The collecting trough is set as a U-shaped structure with a discharge port at its end. A feeding auger for conveying concrete rebound material is installed in the collecting trough, and a first motor connected to the shaft end of the feeding auger is installed on the outer wall of the collecting trough.

[0009] Both sides of the first and second aggregate plates are provided with blocking plates for blocking the concrete rebound material from falling, and a flexible mesh surface for preventing the concrete rebound material from rebounding is laid between the blocking plates.

[0010] A plurality of flexible rubber pads for fitting to the inner wall of the tunnel are installed at the end of the first collecting plate.

[0011] Traveling wheels and a driving motor are installed at the four corners of the mobile bracket, and the output end of the driving motor is transmission-connected to the wheel axle of the traveling wheel.

[0012] A booster pump and a water tank are installed at the bottom of the movable bracket, and a spray pipe for cleaning the first collection plate and the second collection plate is installed at the top of the movable bracket. The spray pipe is provided with multiple downward-inclined nozzles equidistantly arranged along the axial direction. The water inlet of the booster pump is connected to the water tank through a pipe, and the water outlet is connected to the spray pipe through a pipe.

[0013] Beneficial effects of the present invention: The present invention realizes the lateral adjustment function of the device through the laterally movable telescopic frame, the foldable second support frame and the flippable first support frame, and is used in conjunction with the first hydraulic cylinder. It can adapt to tunnels of different sizes and shapes, expand the collection range of concrete rebound materials, and facilitate the transportation and storage of the device, thereby improving the versatility and flexibility of the device. By setting up multiple recovery structures of the first aggregate plate, the second aggregate plate and the collection trough, the concrete rebound materials dropped during the spraying operation can be fully collected to avoid direct contact with the fissure water at the bottom of the tunnel, significantly reducing the influence of alkaline admixtures on the pH value of the water body, effectively reducing the source of water pollution, and reducing the difficulty of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0015] Figure 2 It is another three-dimensional schematic diagram of the present invention.

[0016] Figure 3 It is a partial cross-sectional view of the present invention.

[0017] Figure 4 It is a bottom-up stereoscopic schematic diagram of the present invention.

[0018] Figure 5 It is a three-dimensional schematic diagram of the spraying mechanism.

[0019] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle.

[0020] Figure 7 This is a partial enlarged view of the square tube support beam.

[0021] Figure 8 It is a three-dimensional schematic diagram of the collection tank. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and beneficial effects of the present invention more clear, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding by technicians.

[0023] The present invention discloses a tunnel support concrete spraying device that effectively reduces water pollution sources. The tunnel support concrete spraying device that effectively reduces water pollution sources mainly includes a mobile bracket 1, a telescopic bracket 2, a first support bracket 3, a first collecting plate 4, a spraying mechanism 5, a collecting trough 6, a second collecting plate 7, a first hydraulic cylinder 8, a second hydraulic cylinder 9, and a second support bracket 10. The telescopic bracket 2 that can be moved laterally is slidably installed on both sides of the mobile bracket 1. The second hydraulic cylinder 9 for driving the telescopic bracket 2 to move laterally is installed on the mobile bracket 1. The telescopic bracket 2 is hinged with a first support bracket 3 that can be turned up and down. A first collecting plate 4 is installed on the top of the support frame 3, and one end of the first hydraulic cylinder 8 is hinged on the mobile support 1, and the other end is hinged on the first support frame 3; a foldable second support frame 10 is hinged between the telescopic frames 2, and a second collecting plate 7 is installed on the second support frame 10. The collecting trough 6 is installed on the telescopic frame 2, located between the first collecting plate 4 and the second collecting plate 7. A spraying mechanism 5 that can spray concrete at multiple angles is installed on the top of the mobile support 1; the spraying mechanism 5 includes a support arm 501, a large arm 502, a small arm 503, a third hydraulic cylinder 504, a second motor 505, a spraying assembly 506, The fourth hydraulic cylinder 507, the third motor 508, the L-shaped connecting plate 509, the fourth motor 510, the driving gear 511, the driven gear 512, and the support plate 513; the top of the mobile bracket 1 is equipped with a support plate 102, the bottom end of the support arm 501 is rotatably mounted on the support plate 102, the second motor 505 is mounted on the bottom end of the support plate 102 and is connected to the rotating shaft at the bottom end of the support arm 501, one end of the arm 502 is hinged on the support arm 501, and the other end is equipped with a retractable small arm 503, and the support arm 501 is hinged with a third hydraulic cylinder 504 for driving the arm 502 to swing up and down. A fourth hydraulic cylinder 507 for driving the arm 503 to extend and retract is installed on the boom 502. The third motor 508 is installed on the end of the arm 503 through a fixing part. An L-shaped connecting plate 509 is installed on the output shaft of the third motor 508. The fourth motor 510 is installed on the L-shaped connecting plate 509. A driving gear 511 is installed on its output shaft. A driven gear 512 is installed on the L-shaped connecting plate 509 through a connecting shaft and meshes with the driving gear 511. A support plate 513 is installed on the end face of the driven gear 512. The spraying assembly 506 is installed on the support plate 513 and is connected to the concrete pump through a feed pipe.

[0024] First, the device is moved to the target operation area of ​​the tunnel by a trolley, and then the second hydraulic cylinder 9 is started to drive the telescopic frame 2 to move horizontally, thereby adjusting the distance between the telescopic frames 2 on both sides to make it close to the tunnel section. At the same time, the second support frame 10 hinged between the telescopic frames 2 is automatically unfolded, and the second collection plate 7 is unfolded with the second support frame 10. Then, the first hydraulic cylinder 8 pushes the first support frame 3 to flip downward to an inclined state, and drives the first collection plate 4 to lower, so that the end of the first collection plate 4 contacts the side wall of the tunnel, thereby forming multiple inclined collection surfaces covering the bottom surface of the tunnel; start the second motor 505 at the bottom of the support plate 102 to drive the support arm 501 to rotate around the support plate The central axis 102 rotates horizontally, aligning the spray assembly 506 with the target support surface. The third hydraulic cylinder 504 pushes the upper arm 502 up and down to adjust the spraying height of the spray assembly 506. The fourth hydraulic cylinder 507 controls the extension and retraction of the lower arm 503, extending the spraying coverage range. The third motor 508 drives the L-shaped connecting plate 509 to rotate, driving the spray assembly 506 to rotate on the vertical plane. The fourth motor 510 engages with the driven gear 512 via the driving gear 511, causing the spray assembly 506 to rotate circumferentially around the axis of the connecting shaft. Through this multi-degree-of-freedom coordinated adjustment, the spray assembly 506 can accurately cover the tunnel vault, side walls, and corner areas. Because the spray assembly 506 is connected to the concrete pump via a feed pipe, after the concrete pump is started, concrete can be sprayed at high speed onto the tunnel support surface, forming a uniform coverage layer. The rebound material generated during the spraying process falls downward to the surface of the first aggregate plate 4 and the second aggregate plate 7 under the action of gravity, and slides into the collection tank 6. The concrete rebound material in the collection tank 6 is transferred to the external recovery equipment through the conveying pipe connected at the bottom, thereby achieving physical isolation between the alkaline admixture and the fissure water, avoiding water pollution, and reducing the difficulty of sewage treatment; this device can realize multi-angle and all-round concrete spraying, and effectively collect rebound materials at the same time, reducing water pollution sources and improving construction efficiency and quality.

[0025] The mobile bracket 1 is provided with two square tube support beams 101. Grooves are provided at the four corners of the square tube support beams 101. Multiple balls are embedded in the grooves. The telescopic section of the telescopic frame 2 is slidably inserted in the square tube support beams 101 and in rolling contact with the balls; the balls can reduce the friction force of the telescopic frame 2 when sliding in the square tube support beams 101, making the telescopic frame 2 more smooth, thereby extending the service life of the device.

[0026] A plurality of vibration motors 13 are installed at the bottom of the first aggregate plate 4 and the second aggregate plate 7; the vibration generated by the vibration motor 13 can make the concrete rebound material dropped on the first aggregate plate 4 and the second aggregate plate 7 more easily slide into the collection trough 6, avoid material accumulation and blockage, reduce the residue of concrete rebound material on the first aggregate plate 4 and the second aggregate plate 7, reduce the workload of manual cleaning, and at the same time, improve the collection efficiency.

[0027] The collecting trough 6 is configured as a U-shaped structure, with a discharge port opened at its end. A feeding auger 14 for conveying concrete rebound material is installed in the collecting trough 6, and a first motor 15 is installed on the outer wall of the collecting trough 6 and is transmission-connected to the shaft end of the feeding auger 14. The collected concrete rebound material is conveyed to the discharge port along the collecting trough 6 by the feeding auger 14, which is convenient for subsequent processing and reuse. At the same time, the workload of manual cleaning and handling of rebound material is reduced, saving labor costs and time.

[0028] Both sides of the first aggregate plate 4 and the second aggregate plate 7 are provided with baffle plates 16 for preventing concrete rebound material from falling, and a flexible mesh surface 17 is laid between the baffle plates 16 to prevent the concrete rebound material from rebounding; when the rebound material hits the flexible mesh surface 17, the flexible mesh surface 17 can absorb part of the impact force, reduce the rebound force of the rebound material, and make it easier to fall onto the first aggregate plate 4 and the second aggregate plate 7. At the same time, the baffle plates 16 can prevent the concrete rebound material from falling from both sides of the first aggregate plate 4 and the second aggregate plate 7, ensuring that the concrete rebound material can be collected in the collection trough 6.

[0029] The end of the first aggregate plate 4 is equipped with multiple flexible rubber pads 11 for fitting the inner wall of the tunnel; the rubber pads 11 can be deformed according to the shape of the inner wall of the tunnel to better fit the inner wall, prevent the concrete rebound material from leaking out of the gap, and ensure that the first aggregate plate 4 can effectively collect the concrete rebound material.

[0030] The four corners of the mobile bracket 1 are equipped with walking wheels 12 and drive motors 18. The output end of the drive motor 18 is connected to the wheel axle of the walking wheel 12. The driving motor 18 drives the walking wheel 12 to rotate, so that the device can perform spraying operations at different positions on the trolley or on the ground as needed, which is convenient for movement and use.

[0031] The bottom end of the mobile bracket 1 is equipped with a booster pump 19 and a water tank 20, and the top end of the mobile bracket 1 is equipped with a spray pipe 21 for cleaning the first aggregate plate 4 and the second aggregate plate 7. The spray pipe 21 is equidistantly arranged with multiple downwardly inclined nozzles along the axial direction. The water inlet of the booster pump 19 is connected to the water tank 20 through a pipe, and the water outlet is connected to the spray pipe 21 through a pipe; when it is necessary to clean the first aggregate plate 4 and the second aggregate plate 7, the booster pump 19 is started to pump out the water in the water tank 20, and transport it to the spray pipe 21 through a pipe, and spray it from multiple downwardly inclined nozzles to form a high-pressure water flow to flush the first aggregate plate 4 and the second aggregate plate 7. The flushing water flows into the collecting tank 6 with the residual concrete, and then is discharged to the collection device through the discharge port 3; it can automatically clean the residual and blocked concrete rebound materials on the surface of the first aggregate plate 4 and the second aggregate plate 7, thereby reducing the workload of manual cleaning and improving work efficiency.

[0032] Working process: First, the device is moved to the target working area in the tunnel by a trolley, and then the second hydraulic cylinder 9 is started to drive the telescopic frame 2 to move horizontally, thereby adjusting the distance between the telescopic frames 2 on both sides to make it close to the tunnel section. At the same time, the second support frame 10 hinged between the telescopic frames 2 is automatically unfolded, and the second collection plate 7 is unfolded with the second support frame 10. Then, the first hydraulic cylinder 8 pushes the first support frame 3 to flip downward to an inclined state, and drives the first collection plate 4 to lower, so that the end of the first collection plate 4 contacts the side wall of the tunnel, thereby forming multiple inclined collection surfaces covering the bottom surface of the tunnel; start the second motor 505 at the bottom of the support plate 102 to drive the support arm 501 to rotate around the support plate The central axis 102 rotates horizontally, aligning the spray assembly 506 with the target support surface. The third hydraulic cylinder 504 pushes the upper arm 502 up and down to adjust the spraying height of the spray assembly 506. The fourth hydraulic cylinder 507 controls the extension and retraction of the lower arm 503, extending the spraying coverage range. The third motor 508 drives the L-shaped connecting plate 509 to rotate, driving the spray assembly 506 to rotate on the vertical plane. The fourth motor 510 engages with the driven gear 512 via the driving gear 511, causing the spray assembly 506 to rotate circumferentially around the axis of the connecting shaft. Through this multi-degree-of-freedom coordinated adjustment, the spray assembly 506 can accurately cover the tunnel vault, side walls, and corner areas. Because the spray assembly 506 is connected to the concrete pump via a feed pipe, after the concrete pump is started, concrete can be sprayed at high speed onto the tunnel support surface, forming a uniform coverage layer. The rebound material generated during the spraying process falls downward to the surface of the first aggregate plate 4 and the second aggregate plate 7 under the action of gravity, and slides into the collection tank 6. The concrete rebound material in the collection tank 6 is transferred to the external recovery equipment through the conveying pipe connected at the bottom, thereby achieving physical isolation between the alkaline admixture and the fissure water, avoiding water pollution, and reducing the difficulty of sewage treatment; this device can realize multi-angle and all-round concrete spraying, and effectively collect rebound materials at the same time, reducing water pollution sources and improving construction efficiency and quality.

[0033] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A tunnel support concrete spraying device that effectively reduces water pollution sources, characterized by: The tunnel support concrete spraying device for effectively reducing water pollution sources comprises a mobile support (1), a telescopic support (2), a first support frame (3), a first collecting plate (4), a spraying mechanism (5), a collecting trough (6), a second collecting plate (7), a first hydraulic cylinder (8), a second hydraulic cylinder (9), and a second support frame (10). The mobile support (1) is slidably mounted with a telescopic support (2) that can be moved laterally on both sides. The mobile support (1) is mounted with a second hydraulic cylinder (9) for driving the telescopic support (2) to move laterally. The telescopic support (2) is hinged with a movable support that can be moved up and down. A first supporting frame (3) is flipped, a first collecting plate (4) is installed on the top of the first supporting frame (3), one end of the first hydraulic cylinder (8) is hinged on the movable support (1), and the other end is hinged on the first supporting frame (3); a foldable second supporting frame (10) is hinged between the telescopic frames (2), a second collecting plate (7) is installed on the second supporting frame (10), a collecting trough (6) is installed on the telescopic frame (2), and is located between the first collecting plate (4) and the second collecting plate (7), and a spraying mechanism (5) capable of spraying concrete at multiple angles is installed on the top of the movable support (1).

2. A tunnel support concrete spraying device that effectively reduces water pollution sources according to claim 1, characterized in that: The spraying mechanism (5) comprises a support arm (501), a large arm (502), a small arm (503), a third hydraulic cylinder (504), a second motor (505), a spraying assembly (506), a fourth hydraulic cylinder (507), a third motor (508), an L-shaped connecting plate (509), a fourth motor (510), a driving gear (511), a driven gear (512), and a support plate (513); the top of the mobile bracket (1) is provided with a support plate (102), the bottom end of the support arm (501) is rotatably mounted on the support plate (102), the second motor (505) is mounted on the bottom end of the support plate (102) and is connected to the rotating shaft at the bottom end of the support arm (501); one end of the large arm (502) is hinged to the support arm (501), and the other end is provided with a retractable small arm (503), the support A third hydraulic cylinder (504) for driving the upper arm (502) to swing up and down is hinged on the arm (501), a fourth hydraulic cylinder (507) for driving the lower arm (503) to extend and retract is installed on the upper arm (502), a third motor (508) is installed at the end of the lower arm (503) through a fixing member, an L-shaped connecting plate (509) is installed on the output shaft of the third motor (508), a fourth motor (510) is installed on the L-shaped connecting plate (509), a driving gear (511) is installed on the output shaft of the fourth motor (510), a driven gear (512) is installed on the L-shaped connecting plate (509) through a connecting shaft and meshes with the driving gear (511), a support plate (513) is installed on the end surface of the driven gear (512), and the spraying assembly (506) is installed on the support plate (513) and connected to the concrete pump through a feed pipe.

3. A tunnel support concrete spraying device that effectively reduces water pollution sources according to claim 1 or 2, characterized in that: The movable bracket (1) is provided with two square tube support beams (101), and grooves are provided at the four corners of the square tube support beams (101), and a plurality of balls are embedded in the grooves. The telescopic section of the telescopic bracket (2) is slidably inserted in the square tube support beams (101) and is in rolling contact with the balls.

4. A tunnel support concrete spraying device that effectively reduces water pollution sources as claimed in claim 3, characterized in that: A plurality of vibration motors (13) are installed at the bottom of each of the first material collecting plate (4) and the second material collecting plate (7).

5. A tunnel support concrete spraying device that effectively reduces water pollution sources according to claim 1 or 4, characterized in that: The collecting trough (6) is configured as a U-shaped structure, with a discharge port provided at its end. A feeding auger (14) for conveying concrete rebound material is installed in the collecting trough (6), and a first motor (15) is installed on the outer wall of the collecting trough (6) and is connected to the shaft end of the feeding auger (14).

6. The tunnel support concrete spraying device for effectively reducing water pollution sources according to claim 1, characterized in that: Both sides of the first aggregate plate (4) and the second aggregate plate (7) are provided with baffle plates (16) for blocking the concrete rebound material from falling, and a flexible mesh surface (17) for preventing the concrete rebound material from rebounding is laid between the baffle plates (16).

7. A tunnel support concrete spraying device that effectively reduces water pollution sources according to claim 1 or 4, characterized in that: A plurality of flexible rubber pads (11) for fitting against the inner wall of the tunnel are installed at the end of the first collecting plate (4).

8. A tunnel support concrete spraying device that effectively reduces water pollution sources according to claim 1 or 2, characterized in that: Traveling wheels (12) and a driving motor (18) are installed at the four corners of the mobile bracket (1), and the output end of the driving motor (18) is connected to the wheel axle of the traveling wheel (12) in a transmission manner.

9. The tunnel support concrete spraying device for effectively reducing water pollution sources according to claim 1, characterized in that: The bottom end of the mobile bracket (1) is equipped with a booster pump (19) and a water tank (20), and the top end of the mobile bracket (1) is equipped with a spray pipe (21) for cleaning the first collecting plate (4) and the second collecting plate (7). The spray pipe (21) is provided with a plurality of downwardly inclined nozzles equidistantly arranged along the axial direction. The water inlet of the booster pump (19) is connected to the water tank (20) through a pipe, and the water outlet is connected to the spray pipe (21) through a pipe.

Images