Waterproof detection device for building outer wall

Abstract

The invention is applicable to the technical field of building detection, and provides a waterproof detection device for a building outer wall, the upper end of a mobile vehicle is fixedly connected with an open water storage tank and an infusion pump, the inlet end of the infusion pump is communicated with the open water storage tank, the outlet end of the infusion pump is communicated with a hose, and one end of the hose is communicated with a nozzle pipe fitting; the upper end of the moving trolley is fixedly connected with a lifting mechanism for driving the nozzle pipe fitting to move in the vertical direction, the upper end of the moving trolley is connected with an adsorption fixing mechanism for fixing, the upper end of the open water storage tank is connected with a backflow mechanism, and the backflow mechanism is located above the adsorption fixing mechanism. The building wall is adsorbed and fixed through the multiple suction cups, the movable trolley is fixed, the flow guide plate is always in an extrusion contact state with the surface of the building outer wall under the gravity pull of the balance weight ball, water is prevented from flowing out of a gap between the flow guide plate and the surface of the building outer wall, and waste of water resources is reduced.

Description

Technical Field

[0001] This invention belongs to the field of building inspection technology, and in particular relates to a building exterior wall waterproofing inspection device. Background Technology

[0002] After a building is completed, special attention should be paid to its waterproof performance, especially the exterior walls, as they are frequently exposed to wind and rain. Therefore, various tests are conducted on the building on the construction site after completion to ensure that the building's various indicators meet the requirements. The waterproof performance of the building's exterior walls is often tested using the continuous water spray method, which usually requires continuous spraying for more than six hours to simulate the impact of extreme rainfall conditions on the building's facade.

[0003] However, this traditional testing method suffers from significant resource waste. To mitigate this issue, some testing agencies have attempted to introduce water recycling systems during testing. These systems collect and recycle the sprayed water using collection tanks and diversion pipes. However, during prolonged testing, the recycling devices are prone to displacement or deformation due to water flow impact, equipment vibration, or human factors. This can lead to uncontrollable gaps between the device and the building's exterior wall. These gaps not only reduce water recycling efficiency but also affect the accurate definition of the testing area, potentially creating a false impression of secondary leakage. Therefore, designing a building exterior wall waterproofing testing device is essential. Summary of the Invention

[0004] This invention provides a building exterior wall waterproofing testing device, which aims to solve the problem of water waste caused by gaps easily forming between the device and the building exterior wall during the collection process.

[0005] This invention is implemented as follows: a waterproofing testing device for building exterior walls includes a mobile vehicle. An open-top water tank is fixedly connected to the upper end of the mobile vehicle. A liquid pump is also fixedly connected to the upper end of the mobile vehicle. The inlet of the liquid pump is connected to the open-top water tank, and the outlet of the liquid pump is connected to a flexible hose. One end of the flexible hose is connected to a nozzle fitting. A lifting mechanism that drives the nozzle fitting to move vertically is fixedly connected to the upper end of the mobile vehicle. An adsorption fixing mechanism for fixation is connected to the upper end of the mobile vehicle. A reflux mechanism is connected to the upper end of the open-top water tank, and the reflux mechanism is located above the adsorption fixing mechanism.

[0006] Preferably, the lifting mechanism includes a fixed frame, which is fixedly connected to the upper end of the mobile vehicle. A movable frame is slidably connected to the fixed frame, and a nozzle pipe is fixedly connected to the movable frame. A motor is fixedly connected to the upper end of the fixed frame, and a reciprocating screw that drives the movable frame to move vertically is fixedly connected to the output end of the motor.

[0007] Preferably, a crash sleeve is fitted on the side of the mobile vehicle away from the adsorption and fixing mechanism, a push rod is fixedly connected to the upper end of the mobile vehicle, a first fixing rod is fixedly connected to the upper end of the mobile vehicle, a limit ring is fixedly connected to one end of the first fixing rod, and the hose passes through the limit ring.

[0008] Preferably, the adsorption and fixing mechanism includes a mounting frame, which is fixedly connected to the upper end of the mobile vehicle. A first fixing plate is fixedly connected to the mounting frame. A plurality of suction cups are connected to one side of the first fixing plate, and a hollow box is fixedly connected to the other side of the first fixing plate. All of the suction cups are connected to the hollow box. A negative pressure pump is fixedly connected to the upper end of the mobile vehicle, and the inlet end of the negative pressure pump is connected to the hollow box through a connecting pipe.

[0009] Preferably, the reflux mechanism includes a guide plate, which is rotatably connected to the upper end of the open water tank. The guide plate is located above the suction cup. Guide strips are fixedly connected to both sides of the upper end of the guide plate. A first pull rope is fixedly connected to the upper end of the guide plate. A second fixing plate is fixedly connected to the upper end of the open water tank. One end of the first pull rope passes through the second fixing plate and is fixedly connected to a hanging ring. A hook is fixedly connected to the second fixing plate. The hanging ring and the hook cooperate with each other. A second pull rope is fixedly connected to the bottom end of the guide plate. A counterweight ball is fixedly connected to one end of the second pull rope.

[0010] Preferably, an elastic plate is fixedly connected to the bottom end of the guide plate.

[0011] Preferably, a buffer frame is connected inside the open water storage tank. The buffer frame is located below the lower end of the guide plate. A filter screen is connected to the buffer frame. A baffle is fixedly connected to the second fixed plate. A gap is provided between the baffle and the upper end of the open water storage tank.

[0012] Preferably, the bottom end of the guide plate is connected to a blocking mechanism, the blocking mechanism including a first connecting plate, one end of the first connecting plate being rotatably connected to the bottom end of the guide plate, a spring being fixedly connected to the upper end of the first connecting plate, one end of the spring being fixedly connected to the bottom end of the guide plate, and a second fixing rod being fixedly connected to the other end of the first connecting plate, with an adsorption sleeve sleeved on the second fixing rod.

[0013] Preferably, the absorbent sleeve is an absorbent sponge sleeve.

[0014] Preferably, a recycling mechanism is connected to the movable frame. The recycling mechanism includes a second connecting plate. One end of the second connecting plate is connected to the movable frame by bolts, and the other end of the second connecting plate is fixedly connected to an arc-shaped cover. The nozzle pipe passes through the arc-shaped cover, and the bottom end of the arc-shaped cover is connected to a collection box. The bottom end of the collection box is connected to a discharge pipe.

[0015] Compared with related technologies, the building exterior wall waterproofing detection device provided by the present invention has the following beneficial effects:

[0016] 1. By using several suction cups to adhere to and fix the building wall, the mobile vehicle is secured, ensuring that the guide plate remains in a state of compression contact with the building's exterior wall surface under the pull of the counterweight ball. This prevents water from flowing out through the gap between the guide plate and the building's exterior wall surface, reducing water waste.

[0017] 2. The spring force pushes the second fixing rod downwards, and the second fixing rod presses the building wall through the suction sleeve, absorbing the water flowing out from the gap between the guide plate and the building wall surface, preventing the water from contacting the suction cup, thus not affecting the connection between the suction cup and the building wall.

[0018] 3. Water splashed by the collision with the wall comes into contact with the arc-shaped cover. The water inside the arc-shaped cover falls into the collection box under its own gravity. The water in the collection box is released from the discharge pipe and falls onto the guide plate, reducing water waste. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a building exterior wall waterproofing testing device according to the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of a building exterior wall waterproofing testing device according to the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the connection between the mobile vehicle and the adsorption fixing mechanism in a building exterior wall waterproofing testing device of the present invention;

[0022] Figure 4 This is a schematic diagram of the reflux mechanism in a building exterior wall waterproofing testing device according to the present invention;

[0023] Figure 5 This is a schematic diagram of the lifting mechanism in a building exterior wall waterproofing testing device according to the present invention;

[0024] Figure 6 This is a schematic diagram of the connection between the reflux mechanism and the barrier mechanism in a building exterior wall waterproofing testing device according to the present invention;

[0025] Figure 7 This is a schematic diagram of the connection between the lifting mechanism and the recovery mechanism in a building exterior wall waterproofing testing device of the present invention;

[0026] Figure 8 This is a cross-sectional structural diagram showing the connection between the lifting mechanism and the recovery mechanism in a building exterior wall waterproofing testing device according to the present invention.

[0027] In the diagram: 1. Mobile vehicle; 2. Open water tank; 3. Liquid pump; 4. Hoses; 5. Nozzle fittings; 6. Lifting mechanism; 7. Adsorption and fixing mechanism; 8. Return mechanism; 9. Anti-collision sleeve; 10. Push rod; 11. First fixing rod; 12. Limiting ring; 13. Barrier mechanism; 14. Recovery mechanism; 61. Fixed frame; 62. Movable frame; 63. Motor; 64. Reciprocating screw; 71. Mounting frame; 72. First fixing plate; 73. Suction cup; 74. Hollow box; 75. Negative pressure 76. Pump; 87. Connecting pipe; 88. Guide plate; 89. Guide strip; 80. First pull rope; 81. Second fixing plate; 82. Hanging ring; 83. Hook; 84. Second pull rope; 85. Counterweight ball; 86. Buffer frame; 87. Filter screen; 88. Baffle; 89. Elastic plate; 10. First connecting plate; 10. Spring; 11. Second fixing rod; 12. Adsorption sleeve; 13. Second connecting plate; 14. Arc-shaped cover; 14. Collection box; 14. Discharge pipe. Detailed Implementation

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] A preferred embodiment of the building exterior wall waterproofing testing device provided by the present invention is as follows: Figures 1 to 6 As shown:

[0031] A waterproofing testing device for building exterior walls includes a mobile vehicle 1. An open water tank 2 is fixedly connected to the upper end of the mobile vehicle 1. A liquid pump 3 is also fixedly connected to the upper end of the mobile vehicle 1. The inlet end of the liquid pump 3 is connected to the open water tank 2, and the outlet end of the liquid pump 3 is connected to a hose 4. One end of the hose 4 is connected to a nozzle fitting 5. A lifting mechanism 6 is fixedly connected to the upper end of the mobile vehicle 1 to drive the nozzle fitting 5 to move vertically. An adsorption fixing mechanism 7 for fixing is connected to the upper end of the mobile vehicle 1. A return mechanism 8 is connected to the upper end of the open water tank 2. The return mechanism 8 is located above the adsorption fixing mechanism 7. A crash sleeve 9 is fitted on the side of the mobile vehicle 1 away from the adsorption fixing mechanism 7. A push rod 10 is fixedly connected to the upper end of the mobile vehicle 1. A first fixing rod 11 is fixedly connected to the upper end of the mobile vehicle 1. A limit ring 12 is fixedly connected to one end of the first fixing rod 11, and the hose 4 passes through the limit ring 12.

[0032] The lifting mechanism 6 includes a fixed frame 61, which is fixedly connected to the upper end of the mobile vehicle 1. A movable frame 62 is slidably connected to the fixed frame 61. The movable frame 62 is fixedly connected to the nozzle pipe 5. A motor 63 is fixedly connected to the upper end of the fixed frame 61. A reciprocating screw 64 that drives the movable frame 62 to move in the vertical direction is fixedly connected to the output end of the motor 63.

[0033] The adsorption and fixing mechanism 7 includes a mounting frame 71, which is fixedly connected to the upper end of the mobile vehicle 1. A first fixing plate 72 is fixedly connected to the mounting frame 71. A plurality of suction cups 73 are connected to one side of the first fixing plate 72, and a hollow box 74 is fixedly connected to the other side of the first fixing plate 72. The plurality of suction cups 73 are all connected to the hollow box 74. A negative pressure pump 75 is fixedly connected to the upper end of the mobile vehicle 1. The inlet end of the negative pressure pump 75 is connected to the hollow box 74 through a connecting pipe 76.

[0034] The reflux mechanism 8 includes a guide plate 81, which is rotatably connected to the upper end of the open water tank 2. The guide plate 81 is located above the suction cup 73. Guide strips 82 are fixedly connected to both sides of the upper end of the guide plate 81. A first pull rope 83 is fixedly connected to the upper end of the guide plate 81. A second fixing plate 84 is fixedly connected to the upper end of the open water tank 2. One end of the first pull rope 83 passes through the second fixing plate 84 and is fixedly connected to a hanging ring 85. A hook 86 is fixedly connected to the second fixing plate 84. The ring 85 and the hook 86 cooperate. The bottom end of the guide plate 81 is fixedly connected to the second pull rope 87. One end of the second pull rope 87 is fixedly connected to the counterweight ball 88. The bottom end of the guide plate 81 is fixedly connected to the elastic plate 812. The open water tank 2 is connected to the buffer frame 89. The buffer frame 89 is located below the lower end of the guide plate 81. The buffer frame 89 is connected to the filter screen 810. The second fixed plate 84 is fixedly connected to the baffle 811. There is a gap between the baffle 811 and the upper end of the open water tank 2.

[0035] The staff pushes the push rod 10, which moves the mobile vehicle 1. The mobile vehicle 1 moves the device to the testing location and allows several suction cups 73 to abut against the building's exterior wall. The controller controls the negative pressure pump 75 to be powered on and started. After the negative pressure pump 75 starts, it sucks the gas in the hollow box 74. The hollow box 74 sucks the gas in the suction cups 73, which creates a negative pressure in the suction cups 73, thereby fixing the suction cups 73 to the building's exterior wall and thus fixing the mobile vehicle 1.

[0036] Remove the hanging ring 85 from the hook 86. Under its own weight, the counterweight ball 88 pulls the guide plate 81 downward through the second pull rope 87. The guide plate 81 rotates towards the building's exterior wall. After rotating a certain angle, the guide plate 81 presses against the surface of the building's exterior wall. The guide plate 81 is tilted downward. After the liquid pump 3 starts, it draws water from the open water storage tank 2. The drawn water is introduced into the nozzle fitting 5 through the hose 4 and released from the nozzle fitting 5. After the motor 63 is powered on and started, it drives the reciprocating screw 64 to rotate. After the reciprocating screw 64 rotates, it causes the movable frame 62 to move in the vertical direction. The movable frame 62 drives the nozzle fitting 5 to move in the vertical direction.

[0037] Water flowing down the building wall falls onto the guide plate 81. The guide strip 82 directs the water on the guide plate 81 to prevent it from falling off the sides of the guide plate 81. Water falling from the bottom of the guide strip 82 falls onto the buffer frame 89. The water on the buffer frame 89 passes through the filter screen 810 and enters the open water storage tank 2. The filter screen 810 filters the recovered water. The baffle 811 covers the top of the open water storage tank 2 to reduce dust entering the open water storage tank 2.

[0038] The mobile vehicle 1 is fixed to the building wall by several suction cups 73, so that the guide plate 81 is always in a state of compression contact with the building wall surface under the pull of the counterweight ball 88, which prevents water from flowing out from the gap between the guide plate 81 and the building wall surface and reduces the waste of water resources.

[0039] In this embodiment, due to the presence of uneven particles on the wall surface, some water flows out from the gap between the guide plate 81 and the building's exterior wall surface. This outflowing water comes into contact with the suction cup 73, thereby reducing the fixing effect of the suction cup 73. In a further preferred embodiment of the present invention, referring to... Figures 5 to 6 The bottom end of the guide plate 81 is connected to a blocking mechanism 13. The blocking mechanism 13 includes a first connecting plate 131. One end of the first connecting plate 131 is rotatably connected to the bottom end of the guide plate 81. A spring 132 is fixedly connected to the upper end of the first connecting plate 131. One end of the spring 132 is fixedly connected to the bottom end of the guide plate 81. The other end of the first connecting plate 131 is fixedly connected to a second fixing rod 133. An adsorption sleeve 134 is sleeved on the second fixing rod 133. The adsorption sleeve 134 is an absorbent sponge sleeve.

[0040] As the guide plate 81 rotates towards the building wall, it also drives the first connecting plate 131 to rotate. The first connecting plate 131 drives the second fixing rod 133 to rotate, and the second fixing rod 133 drives the suction sleeve 134 to rotate. After rotating a certain angle, the suction sleeve 134 contacts the building wall and pushes the second fixing rod 133 to rotate upward. The second fixing rod 133 drives the first connecting plate 131 to rotate upward. After the first connecting plate 131 rotates upward, it squeezes the spring 132. The spring 132 generates elastic force after being compressed. The elastic force generated by the spring 132 squeezes the second fixing rod 133 downward. The second fixing rod 133 squeezes the building wall through the suction sleeve 134, absorbing the water flowing out from the gap between the guide plate 81 and the surface of the building wall, preventing the water from contacting the suction cup 73, thus not affecting the connection between the suction cup 73 and the building wall.

[0041] In this embodiment, when the nozzle fitting 5 sprays water onto the building wall, the water splashes outwards after colliding with the wall, resulting in some water waste. In a further preferred embodiment of the present invention, referring to... Figures 7 to 8 A recycling mechanism 14 is connected to the movable frame 62. The recycling mechanism 14 includes a second connecting plate 141. One end of the second connecting plate 141 is connected to the movable frame 62 by bolts. The other end of the second connecting plate 141 is fixedly connected to an arc-shaped cover 142. The nozzle fitting 5 passes through the arc-shaped cover 142. The bottom end of the arc-shaped cover 142 is connected to a collection box 143. The bottom end of the collection box 143 is connected to a discharge pipe 144.

[0042] The second connecting plate 141 fixes the arc-shaped cover 142, which is located outside the nozzle fitting 5. The water splashed by the collision with the wall comes into contact with the arc-shaped cover 142. The water in the arc-shaped cover 142 falls into the collection box 143 under its own gravity. The water in the collection box 143 is released from the discharge pipe 144. The water released from the discharge pipe 144 falls onto the guide plate 81, reducing water waste.

[0043] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods.

[0044] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A waterproofing testing device for building exterior walls, comprising a mobile vehicle (1), wherein an open water storage tank (2) is fixedly connected to the upper end of the mobile vehicle (1), and a liquid pump (3) is fixedly connected to the upper end of the mobile vehicle (1), characterized in that, in: The inlet end of the pump (3) is connected to the open water tank (2), and the outlet end of the pump (3) is connected to a hose (4). One end of the hose (4) is connected to a nozzle fitting (5). The upper end of the mobile vehicle (1) is fixedly connected to a lifting mechanism (6) that drives the nozzle fitting (5) to move vertically. The upper end of the mobile vehicle (1) is connected to an adsorption fixing mechanism (7) for fixing. The upper end of the open water tank (2) is connected to a reflux mechanism (8), and the reflux mechanism (8) is located above the adsorption fixing mechanism (7).

2. The building exterior wall waterproofing testing device as described in claim 1, characterized in that, The lifting mechanism (6) includes a fixed frame (61), which is fixedly connected to the upper end of the mobile vehicle (1). A movable frame (62) is slidably connected to the fixed frame (61). The movable frame (62) is fixedly connected to the nozzle fitting (5). A motor (63) is fixedly connected to the upper end of the fixed frame (61). A reciprocating screw (64) that drives the movable frame (62) to move vertically is fixedly connected to the output end of the motor (63).

3. The building exterior wall waterproofing testing device as described in claim 1, characterized in that, A crash cover (9) is fitted on the side of the mobile vehicle (1) away from the adsorption and fixing mechanism (7). A push rod (10) is fixedly connected to the upper end of the mobile vehicle (1). A first fixing rod (11) is fixedly connected to the upper end of the mobile vehicle (1). A limit ring (12) is fixedly connected to one end of the first fixing rod (11). The hose (4) passes through the limit ring (12).

4. The building exterior wall waterproofing testing device as described in claim 1, characterized in that, The adsorption and fixing mechanism (7) includes a mounting frame (71), which is fixedly connected to the upper end of the mobile vehicle (1). A first fixing plate (72) is fixedly connected to the mounting frame (71). A plurality of suction cups (73) are connected to one side of the first fixing plate (72), and a hollow box (74) is fixedly connected to the other side of the first fixing plate (72). The plurality of suction cups (73) are all connected to the hollow box (74). A negative pressure pump (75) is fixedly connected to the upper end of the mobile vehicle (1), and the inlet end of the negative pressure pump (75) is connected to the hollow box (74) through a connecting pipe (76).

5. The building exterior wall waterproofing testing device as described in claim 4, characterized in that, The reflux mechanism (8) includes a guide plate (81), which is rotatably connected to the upper end of the open water tank (2). The guide plate (81) is located above the suction cup (73). Guide strips (82) are fixedly connected to both sides of the upper end of the guide plate (81). A first pull rope (83) is fixedly connected to the upper end of the guide plate (81). A second fixing plate (84) is fixedly connected to the upper end of the open water tank (2). One end of the first pull rope (83) passes through the second fixing plate (84) and is fixedly connected to a hanging ring (85). A hook (86) is fixedly connected to the second fixing plate (84). The hanging ring (85) cooperates with the hook (86). A second pull rope (87) is fixedly connected to the bottom end of the guide plate (81). A counterweight ball (88) is fixedly connected to one end of the second pull rope (87).

6. The building exterior wall waterproofing testing device as described in claim 5, characterized in that, An elastic plate (812) is fixedly connected to the bottom end of the guide plate (81).

7. The building exterior wall waterproofing testing device as described in claim 6, characterized in that, The open water tank (2) is connected to a buffer frame (89), which is located below the lower end of the guide plate (81). A filter screen (810) is connected to the buffer frame (89). A baffle (811) is fixedly connected to the second fixed plate (84). There is a gap between the baffle (811) and the upper end of the open water tank (2).

8. The building exterior wall waterproofing testing device as described in claim 7, characterized in that, The bottom end of the guide plate (81) is connected to a blocking mechanism (13). The blocking mechanism (13) includes a first connecting plate (131). One end of the first connecting plate (131) is rotatably connected to the bottom end of the guide plate (81). A spring (132) is fixedly connected to the upper end of the first connecting plate (131). One end of the spring (132) is fixedly connected to the bottom end of the guide plate (81). The other end of the first connecting plate (131) is fixedly connected to a second fixing rod (133). An adsorption sleeve (134) is sleeved on the second fixing rod (133).

9. A building exterior wall waterproofing testing device as described in claim 8, characterized in that, The absorbent sleeve (134) is an absorbent sponge sleeve.

10. A building exterior wall waterproofing testing device as described in claim 2, characterized in that, The movable frame (62) is connected to a recycling mechanism (14), which includes a second connecting plate (141). One end of the second connecting plate (141) is connected to the movable frame (62) by bolts, and the other end of the second connecting plate (141) is fixedly connected to an arc-shaped cover (142). The nozzle fitting (5) passes through the arc-shaped cover (142), and the bottom end of the arc-shaped cover (142) is connected to a collection box (143). The bottom end of the collection box (143) is connected to a discharge pipe (144).

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