A flush pump pipe discharge system arranged in an elevator shaft

Abstract

The application provides a kind of wash pump pipe discharge system of being arranged in the elevating of elevator shaft, it is related to building construction technical field.It includes being located in the upper platform of elevator shaft, lower platform and delivery pipeline, at least one vertical slide rail is equipped on the sidewall of the elevator shaft, the upper platform is slidably in the slide rail and is locked by locking mechanism;The lower platform is located at the bottom of elevator shaft, the lower platform is equipped with water storage tank, one end of the delivery pipeline is communicated with the top of upper platform, the other end of the delivery pipeline is communicated with the water storage tank.A support is provided on the construction floor, the other end of the support is provided with a fixed pulley and a traction rope, one end of the traction rope is connected with the upper platform, the other end of the traction rope is connected with the lower platform.The application has the effect of improving and reducing the difficulty of washing pump water from high-rise construction downward discharge, and improving the discharge efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a flush pump pipe discharge system arranged in an elevator shaft and capable of being lifted. BACKGROUND

[0002] A concrete distributing machine is a new type of building construction mechanical equipment, which is used together with a concrete pump to complete concrete pouring work, is conducive to protecting the quality of steel bar binding, and is therefore widely used in high-rise residences. In the current efficient and rapid urban construction, the distributing machine plays an indispensable role. At the beginning of concrete pouring, the pump pipe needs to be flushed with water and wetted with pump mortar, and after the completion of concrete pouring, the distributing machine needs to be flushed clean.

[0003] At present, since the pump flushing water after flushing contains a large amount of mortar, direct discharge will pollute the environment and greatly increase the difficulty of subsequent treatment, so a special storage tank is generally arranged at the top of the building to collect and temporarily store the pump flushing water.

[0004] However, the storage tank has a limited capacity, and a tower crane needs to be frequently used to hoist the storage tank to realize the transfer of the pump flushing water, which is complicated to operate and low in efficiency, and needs to be matched with a tower crane, which has a high requirement for on-site scheduling. SUMMARY

[0005] In order to improve the problems of low efficiency and complex operation caused by hoisting the pump flushing water by a tower crane, the present application provides a flush pump pipe discharge system arranged in an elevator shaft and capable of being lifted.

[0006] The present application provides a flush pump pipe discharge system arranged in an elevator shaft and capable of being lifted, which adopts the following technical scheme:

[0007] A flush pump pipe discharge system arranged in an elevator shaft and capable of being lifted, comprising an upper platform, a lower platform and a conveying pipeline arranged in the elevator shaft, at least one vertical slide rail is arranged on each side wall of the elevator shaft, the upper platform is adapted to slide between the plurality of slide rails and is locked by a locking mechanism.

[0008] The lower platform is located at the bottom of the elevator shaft, a water storage tank is arranged on the lower platform, one end of the conveying pipeline is in communication with the top of the upper platform, and the other end of the conveying pipeline is in communication with the water storage tank.

[0009] By adopting the technical scheme, the at least four slide rails are arranged in the elevator shaft and located on the side walls, so that the upper platform can slide in the elevator shaft after the rollers are arranged on the side walls of the upper platform, and then the upper platform can be lifted upward by manpower or a winch and the like under the assistance of the rollers and the slide grooves, so that the movable operation of the upper platform is realized, and then the mortar containing the pump water can be transported to the top of the upper platform on the construction floor, and then directly transported to the water storage tank through the conveying pipeline, so that the pump water can be reliably transported without using a tower crane, and when the building height is gradually increased, the upper platform can be lifted, and the length of the water conveying pipeline only needs to be increased to realize reliable transportation of the pump water, so that the operation is simple and the conveying efficiency is high.

[0010] Optionally, the construction floor is provided with a support, one side of the support is detachably arranged on the ground of the construction floor, and the other end of the support extends into the elevator shaft.

[0011] The other end of the support is provided with a fixed pulley, a traction rope is wound on the fixed pulley, one end of the traction rope is connected with the upper platform, and the other end of the traction rope is connected with the lower platform.

[0012] By adopting the technical scheme, when the current construction floor is completed and needs to be poured upward, the support is first moved to the shaft opening of the elevator shaft close to the current construction floor, and then the support is fixed on the ground through bolts, and in order to improve the stability of the support, a counterweight can also be placed on the support, then the two ends of the traction rope are fixed on the upper platform and the lower platform respectively, the locking mechanism is unlocked, the pump water is transported to the water storage tank through the conveying pipeline, or the counterweight is placed on the lower platform to increase the gravity of the lower platform, so that the lower platform moves downward, and then the upper platform moves upward automatically under the cooperation of the fixed pulley and the traction rope, so that the operation is simple, and a dedicated hoisting device is not needed, thereby reducing the requirement of the equipment for lifting the upper platform.

[0013] Optionally, the top of the upper platform is provided with a through hole, and the other end of the traction rope passes through the upper platform through the through hole and is connected with the lower platform.

[0014] The top of the upper platform is also provided with a hopper, the hopper is arranged in the upper platform, the bottom of the hopper is communicated with the conveying pipeline, and the top of the hopper is not higher than the top of the upper platform.

[0015] By adopting the technical scheme, the traction rope passes through the upper platform through the through hole, so that the traction rope and the upper platform do not contact each other, thereby ensuring that the traction rope can reliably pull the upper platform and the lower platform, and the traction rope will not be excessively worn, the service life of the traction rope is prolonged, and the reliability of the traction of the traction rope on the upper platform and the lower platform is ensured.

[0016] Optionally, the lower platform is also adapted to slide between a plurality of slide rails, and the bottom of the elevator shaft is provided with a hydraulic cylinder, which drives the lower platform to reciprocate vertically.

[0017] By adopting the above technical scheme, when the pump water is transported to the water storage tank through the conveying pipeline, the hydraulic cylinder lifts the lower platform, so that the bottom of the lower platform is away from the bottom of the elevator shaft, at this time, the traction rope adjusts the length of the traction rope to be in a tension state, when the upper platform needs to be lifted, the locking mechanism is unlocked, and then the hydraulic cylinder is retracted to lift the lower platform slowly downward, in the process of moving the lower platform, the traction rope can lift the upper platform upward after the redirection of the fixed pulley, and the descending speed of the lower platform can be reliably controlled by controlling the retraction speed of the hydraulic cylinder, thereby realizing precise control of the ascending speed of the upper platform, preventing the upper platform from ascending too fast and deviating from the set installation position, and repeatedly adjusting, and the ascending speed being too fast is also easy to cause personnel collision and injury, that is, the installation precision and the safety of operation are improved by the control effect of the hydraulic cylinder.

[0018] Optionally, the locking mechanism comprises a pair of movable rods, one end of the movable rod is hinged to the bottom of the upper platform, and the other end of the movable rod rotates around the hinge point and forms a triangular configuration with the upper platform.

[0019] By adopting the above technical scheme, when the upper platform is lifted, the angle between the movable rod and the upper platform is enlarged, so that the movable rod is completely located in the elevator shaft and does not interfere with the elevator shaft, ensuring that the upper platform can move smoothly; after the upper platform is moved to the position, the movable rod is pulled, so that the angle between the movable rod and the upper platform is reduced, and a firm triangular configuration is formed between the movable rod and the upper platform, realizing the diagonal bracing effect of the upper platform, and realizing the locking of the upper platform.

[0020] Optionally, the hinge point of the movable rod and the upper platform is away from the construction floor.

[0021] By adopting the above technical scheme, one end of the movable rod and the upper platform is away from the operator, and the other end of the movable rod is close to the operator, so as to facilitate the rotation and fixation of the other end of the movable rod, thereby realizing the locking and unlocking of the upper platform.

[0022] Optionally, the other end of the movable rod is provided with a movable seat, the rotating seat rotates around the other end of the movable rod, and the movable seat is detachably arranged on the ground of the lower floor of the construction floor.

[0023] By adopting the technical scheme, after the upper platform is lifted into position, the movable rod is rotated, the movable seat on the other end of the movable rod is in contact with the ground of the lower floor, and then the movable seat is locked and fixed through the bolt, so that the other end of the movable rod is fixed, thus the movable rod forms a diagonal bracing effect on the upper platform, and the upper platform is quickly and reliably locked.

[0024] Optionally, a pull rod is hinged to the movable rod, and the pull rod is pulled to swing the movable rod.

[0025] By adopting the technical scheme, the operator holds the pull rod to adjust the rotation angle of the movable rod, so that the operator does not need to put his body into the elevator shaft during operation, and the safety during the lifting operation is improved.

[0026] Optionally, a discharge pipe is arranged on the side wall of the water storage tank, and a valve is arranged on the discharge pipe, and the washing pump water is discharged from the water storage tank through the discharge pipe.

[0027] By adopting the technical scheme, the valve arranged on the discharge pipe can control the water amount in the water storage tank, so that the overall weight of the water storage tank is controlled, and the weight of the water storage tank and the lower platform can reliably pull the upper platform to move upward.

[0028] Optionally, a filter screen is arranged at the slot of the water storage tank, and the other end of the conveying pipeline and the communication port of the discharge pipe are located on the same side of the filter screen.

[0029] By adopting the technical scheme, when the conveying pipeline and the discharge pipe are located above the filter screen at one end of the water storage tank, the washing pump water can pass through the filter screen into the water storage tank, the discharge pipe is used to discharge the washing pump water, and the mortar is intercepted on the filter screen; when the conveying pipe and the discharge pipe are located below the filter screen at one end of the water storage tank, the mortar is intercepted below the filter screen, the discharge pipe is used to discharge the mortar, and the washing pump water passes through the filter screen from bottom to top and is discharged outward.

[0030] In summary, the present application has the following advantages:

[0031] 1. The water storage tank itself presses down the lower platform under the action of its own gravity, and then the redirection and pulling action of the fixed pulley and the traction rope are matched to realize the movable operation of the upper platform, then the washing pump water can be directly discharged into the conveying pipeline at the construction floor and conveyed into the water storage tank located at the lower part of the elevator shaft, without using the tower crane for hoisting, and the operation is more stable and convenient.

[0032] 2、Through the adjustment of the angle of the movable rod, the locking effect on the upper platform and the release of the locking effect are realized, which can ensure that the upper platform is reliably positioned and fixed after the lifting of the upper platform is completed, prevent the upper platform from falling accidentally, and improve the overall stability and safety.

[0033] 3、Through the control of the action speed of the hydraulic cylinder, the slow lifting of the upper platform under the pulling effect of the lower platform is ensured, the lifting height is ensured to be accurate, and the stability during the lifting process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is the schematic perspective view of the present application;

[0035] Figure 2 is the schematic top view of the upper platform in the present application;

[0036] Figure 3 is the schematic front view of the present application;

[0037] Figure 4 is the action state reference diagram of Figure 3

[0038] Figure 5 is the schematic perspective view of the water storage tank in the present application;

[0039] In the figure: 1, elevator shaft; 11, slide rail; 2, upper platform; 21, perforation; 22, funnel; 23, movable rod; 24, movable seat; 25, pull rod; 26, roller; 3, lower platform; 4, conveying pipeline; 5, water storage tank; 51, discharge pipe; 52, valve; 53, filter screen; 6, construction floor; 7, support; 71, fixed pulley; 72, traction rope; 8, hydraulic cylinder. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings Figures 1-5 The present application is further described in detail.

[0041] Figure 1 is the schematic perspective view of the present application, Figure 2 is the schematic top view of the upper platform in the present application. Referring to Figure 1 and Figure 2 ​The utility model provides a kind of flush pump pipe discharge system of arrangement in the elevating in elevator shaft, including the upper platform 2, lower platform 3 and delivery pipe 4 being located in elevator shaft 1, at least one vertical slide rail 11 is equipped on any side wall of elevator shaft 1, that is, at least four slide rails 11 are equipped in elevator shaft 1, respectively and one by one corresponding on four side walls of elevator shaft 1, upper platform 2 and lower platform 3 can slide between four slide rails 11, four slide rails 11 are arranged in mouth shape, can maximumly improve the stability of the movement of upper platform 2 and lower platform 3, the length of slide rail 11 can be lengthened along with the promotion of construction progress, ensure that the length of slide rail 11 is enough for the sliding of upper platform 2 and lower platform 3, outer wall of upper platform 2 and lower platform 3 is equipped with roller 26, roller 26 can slide in slide rail 11, to make upper platform 2 and lower platform 3 can slide along the extension direction of slide rail 11, roller 26 slides in slide rail 11, on the one hand, it can play the role of facilitating the movement of upper platform 2 and lower platform 3, on the other hand, it can also play the role of limiting the movement direction of upper platform 2 and lower platform 3, ensure that upper platform 2 and lower platform 3 can move smoothly and the movement amount can be more accurately controlled, to ensure that the lifting operation of upper platform 2 is more accurate.

[0042] Figure 3 It is the illustrative front view of the present application. Referring to Figure 3 Support 7 is arranged at the shaft mouth of elevator shaft 1 near construction floor 6, one end of support 7 is detachably connected with the ground of construction floor 6, for example, bolt is used to fix one end of support 7, and counterweight is placed on one end of support 7, to ensure that support 7 can be reliably fixed, and also to reduce the size of bolt used, to reduce the damage of bolt to ground. The other end of support 7 extends into elevator shaft 1, the other end of support 7 is provided with fixed pulley 71, fixed pulley 71 is arranged near the axis of elevator shaft 1, traction rope 72 is wound on fixed pulley 71, one end of traction rope 72 is connected with upper platform 2, the other end of traction rope 72 extends downward after passing through perforation 21 on upper platform 2 and is connected with lower platform 3. Under the action of fixed pulley 71, upper platform 2 and lower platform 3 can move in opposite directions, that is, when the weight of lower platform 3 is greater than the weight of upper platform 2, the downward movement of lower platform 3 can pull the upward movement of upper platform 2, when the weight of lower platform 3 is less than the weight of upper platform 2, the downward movement of upper platform 2 will pull the upward movement of lower platform 3, that is, by controlling the movement state of lower platform 3, the lifting effect of upper platform 2 is realized.

[0043] Figure 4 It is the action state reference drawing of Figure 3 . Referring to Figure 4A funnel 22 is arranged on the upper platform 2, the top of the funnel 22 is not higher than the top of the upper platform 2, the bottom of the funnel 22 is communicated with the conveying pipeline 4 through the upper platform 2, so that the pump washing water generated by the flushing pump pipeline can be directly conveyed to the funnel 22, and since the top of the funnel 22 is lower than or equal to the top of the upper platform 2, the pump washing water can smoothly flow into the funnel 22 and then be conveyed to the lower part of the building through the funnel 22 and the conveying pipeline 4, so that the pump washing water can be quickly treated.

[0044] A locking mechanism is arranged at the bottom of the upper platform 2, the locking mechanism comprises a movable rod 23, a movable seat 24 and a pull rod 25, one end of the movable rod 23 is hinged to the bottom of the upper platform 2, the other end of the movable rod 23 is hinged to the movable seat 24, the movable seat 24 is detachably connected to the ground of the lower floor of the construction floor 6, such as by a bolt, and the pull rod 25 is hinged to the middle of the movable rod 23. After the bolt connecting the movable seat 24 and the floor ground is removed, the operator can lift the upper platform 2 and quickly adjust the angle between the movable rod 23 and the upper platform 2 by pushing the pull rod 25, so as to ensure that a large included angle is maintained between the movable rod 23 and the upper platform 2 during the lifting of the upper platform 2, that is, to ensure that the movable rod 23 can be completely rotated into the elevator shaft 1, so that the movable rod 23 will not rub or collide with the inner wall of the elevator shaft 1 during the lifting of the upper platform 2, and at the same time, under the pulling action of the pull rod 25, the end of the movable rod 23 provided with the movable seat 24 will not be too far away from the operator, so as to ensure that after the upper platform 2 is lifted, the movable rod 23 can be easily pulled out of the elevator shaft 1 by the pull rod 25, thereby reducing the included angle between the movable rod 23 and the upper platform 2 and again realizing the formation of a triangular configuration between the movable rod 23 and the upper platform 2, and finally the movable seat 24 is locked by a bolt, thereby realizing the reliable locking and supporting of the upper platform 2 by the movable rod 23 and preventing the upper platform 2 from falling during subsequent operations.

[0045] A hydraulic cylinder 8 is arranged below the lower platform 3, the hydraulic cylinder 8 pushes the lower platform 3 to make vertical reciprocating motion, the hydraulic cylinder 8 pushes the bottom center of the lower platform 3, which can improve the stability of the pushing action on the lower platform 3 (it should be noted that the pushing rod of the hydraulic cylinder 8 and the bottom center of the lower platform 3 are not connected), and in order to meet the lifting height of the upper platform 2, a multi-stage hydraulic cylinder can be used, which can save installation space and ensure that the hydraulic cylinder 8 can push the lower platform 3 to generate sufficient displacement; a water storage tank 5 is arranged at the top of the lower platform 3, the conveying pipeline 4 conveys the pump washing water input through the funnel 22 into the water storage tank 5, a discharge pipe 51 is arranged on the side wall of the water storage tank 5, the pump washing water containing mortar is discharged through the discharge pipe 51, and a valve 52 on the discharge pipe 51 is used to control the discharge amount of the pump washing water.

[0046] Figure 5 is a schematic perspective view of the water storage tank in the present application. Referring to Figure 5 , in combination with Figure 3 , before the upper platform 2 needs to be lifted, the water in the water storage tank 5 is kept in a state of being delivered to the water delivery pipeline 4, and the valve 52 on the discharge pipeline 51 is closed, so that the amount of water in the water storage tank 5 is in a high state (this process accumulates the weight of the water storage tank 5), further, a filter screen 53 can be arranged at the opening of the water storage tank 5, and the water delivery pipeline 4 extends below the filter screen 53, so that the mortar is retained in the water storage tank 5, and the water in the water pump is overflowed from the opening of the water storage tank 5 after passing through the filter screen 53 (at this time, the water in the water pump does not contain mortar, and can be directly discharged, or an overflow pipe can be arranged at the opening of the water storage tank 5 and above the filter screen 53 to realize centralized discharge of the water in the water pump), finally, there is more mortar in the water storage tank 5, so that the weight of the water storage tank 5 can be maximized under the condition of limited volume of the water storage tank 5, and at this time, the push rod of the hydraulic cylinder 8 is in a raised state, and the traction rope 72 is in a tensioned state.

[0047] When the upper platform 2 needs to be lifted, the movable seat 24 is detached from the ground of the next floor of the current construction floor 6, so that the movable rod 23 can be in a movable state, then the push rod of the hydraulic cylinder 8 is retracted, so that the lower platform 3 drives the water storage tank 5 to move downward, and under the condition that the weight can be supplemented on the lower platform 3, the movement of the lower platform 3 can better pull the traction rope 72 downward, and under the redirection of the fixed pulley 71, the lifting effect on the upper platform 2 is realized.

[0048] After the upper platform 2 is lifted for a distance, the operator on the next floor holds the pull rod 25 to push the movable rod 23, so that the angle between the movable rod 23 and the upper platform 2 becomes larger, so that the movable rod 23 completely enters the elevator shaft 1, so that the movable rod 23 does not rub or collide with the elevator shaft 1 during the lifting of the upper platform 2, so as to ensure that the upper platform 2 can be reliably lifted.

[0049] When the upper platform 2 is lifted above the set height, the operator at the construction floor 6 holds the pull rod 25 and pulls the movable rod 23 through the pull rod 25, so that the angle between the movable rod 23 and the upper platform 2 is reduced, and the other end of the movable rod 23 is in contact with the ground of the construction floor 6. At this time, the movable seat 24 is fixed by using bolts and other fasteners, then the push rod of the hydraulic cylinder 8 is slightly extended, so that the lower platform 3 is slightly lifted, so that the upper platform 2 is slightly lowered, thereby pressing the movable rod 23, so that the movable rod 23 and the upper platform 2 form a stable triangular configuration, and the upper platform 2 is reliably locked; at the same time, during the construction process, the weight and position of the lower platform 3 are controlled, and the locking effect of the upper platform 2 is also achieved, so that the upper platform 2 does not move or fall during the construction process.

[0050] After the upper platform 2 is locked, the valve 52 can be opened again to discharge the mortar in the water storage tank 5 to prevent the mortar from solidifying in the water storage tank 5. At the same time, the conveying pipeline 4 is a corrugated pipe with elasticity, so that the upper platform 2 and the lower platform 3 will not cause excessive stretching of the conveying pipeline 4 during lifting or lowering, which will not cause damage to the conveying pipeline 4. Moreover, when the building height is high, the mortar in the pump water moves from top to bottom, and the pump water has a great impact on the conveying pipeline 4. However, the conveying pipeline 4 will not be damaged due to its elastic deformation.

[0051] The working principle of the application in use is as follows: the pump water is stored in the water storage tank 5 to increase the overall weight of the water storage tank 5, and when the upper platform 2 is not lifted, the push rod of the hydraulic cylinder 8 is in an extended state, and the length of the traction rope 72 is adjusted so that the traction rope 72 is in a tensioned state. When the upper platform 2 needs to be lifted, the push rod of the hydraulic cylinder 8 is slowly retracted, so that the lower platform 3 and the water storage tank 5 full of pump water move downward, and the downward movement of the lower platform 3 and the water storage tank 5 realizes the lifting of the upper platform 2 under the cooperation of the traction rope 72 and the fixed pulley 71. The upper platform 2 is lifted without using a tower crane or other devices that require complex operation. By controlling the movement speed of the push rod of the hydraulic cylinder 8, the upper platform 2 can be stably and accurately lifted, ensuring that the hopper 22 on the upper platform 2 and the conveying pipeline 4 can collect and transport pump water as the building floor rises, and the lifting operation is simple and the control of the lifting height is more accurate.

[0052] The above are preferred embodiments of the application, which do not limit the protection scope of the application. Any equivalent changes made on the basis of the structure, shape and principle of the application shall be covered by the protection scope of the application.

Claims

1. An elevated flush pump pipe discharge system arranged in an elevator hoistway, characterized in that, The utility model provides an elevator shaft (1) is equipped with upper platform (2), lower platform (3) and conveying pipeline (4) in the elevator shaft (1), and the vertical slide rail (11) of at least one side wall of elevator shaft (1) is equipped with, and the upper platform (2) is adapted to slide between the slide rail (11) and is locked by locking mechanism, The lower platform (3) is located at the bottom of the elevator shaft (1), and the water storage tank (5) is arranged on the lower platform (3), one end of the conveying pipeline (4) is communicated with the top of the upper platform (2), and the other end of the conveying pipeline (4) is communicated with the water storage tank (5), The construction floor (6) is provided with a support (7), one side of the support (7) is detachably arranged on the ground of the construction floor (6), and the other end of the support (7) extends into the elevator shaft (1), The other end of the support (7) is provided with a fixed pulley (71), the traction rope (72) is wound on the fixed pulley (71), one end of the traction rope (72) is connected with the upper platform (2), and the other end of the traction rope (72) is connected with the lower platform (3).

2. An arrangement according to claim 1, c h a r a c t e r i s e d in that The top of the upper platform (2) is provided with a perforation (21), and the other end of the traction rope (72) passes through the upper platform (2) through the perforation (21) and is connected with the lower platform (3); The top of the upper platform (2) is also provided with a hopper (22), the hopper (22) is arranged on the upper platform, the bottom of the hopper (22) is communicated with the conveying pipeline (4), and the top of the hopper (22) is not higher than the top of the upper platform (2).

3. An arrangement according to claim 1, c h a r a c t e r i s e d in that The lower platform (3) is also adapted to slide between the slide rail (11), and the bottom of the elevator shaft (1) is provided with a hydraulic cylinder (8), the hydraulic cylinder (8) drives the lower platform (3) to make reciprocating motion in the vertical direction.

4. An arrangement according to claim 3, c h a r a c t e r i s e d in that The locking mechanism comprises a pair of movable rods (23), one end of the movable rod (23) is hinged to the bottom of the upper platform (2), the other end of the movable rod (23) rotates around the hinge point and forms a triangular configuration with the upper platform (2).

5. An arrangement according to claim 4, c h a r a c t e r i s e d in that The hinge point of the movable rod (23) and the upper platform (2) is away from the construction floor (6).

6. An arrangement according to claim 4, c h a r a c t e r i s e d in that The other end of the movable rod (23) is provided with a movable seat (24), the movable seat (24) rotates around the other end of the movable rod (23), and the movable seat (24) is detachably arranged on the ground of the floor below the construction floor (6).

7. An arrangement according to claim 6, c h a r a c t e r i s e d in that The movable rod (23) is also hinged with a pull rod (25), and the swing of the movable rod (23) is realized by pulling the pull rod (25).

8. An arrangement according to claim 1, c h a r a c t e r i s e d in that The side wall of the water storage tank (5) is provided with a discharge pipe (51), the discharge pipe (51) is provided with a valve (52), and the pump water is discharged from the water storage tank (5) through the discharge pipe (51).

9. An arrangement according to claim 8, c h a r a c t e r i s e d in that The water storage tank (5) is provided with a filter screen (53) at the slot, and the other end of the conveying pipeline (4) and the discharge pipe (51) are located on the same side of the filter screen (53).

Images