TW202034987A - Replaceable bottom valve of fire cistern and water pumping system having the same for greatly enhancing convenience for bottom valve replacement to substantially reduce maintenance cost - Google Patents

Abstract

A replaceable bottom valve comprises: a blocking portion; a base portion connected with the blocking portion; a bottom valve portion capable of unidirectionally operating with respect to the base portion and/or the blocking portion, which is operable between a water pumping position for keeping the communication of a water suction tube and a cistern and a closed position for closing the communication of the water suction tube and the cistern; a traction member having one end exposed at the closed location operated by a pull rope on the opposite bottom valve blocking portion at the other end from the closed position toward the water pumping position; and, an output/input operating member having one deep-in end connected with the blocking portion and/or the base portion and one retrieving end opposite to the deep-in end and disposed at the corresponding replacement end.

Description

Fire-fighting pool pumpable bottom valve and water pumping system with the pumpable bottom valve

The invention relates to a pumpable bottom valve for a fire pool and a water pumping system with the pumpable bottom valve.

For public places or buildings such as buildings, buildings, factories, schools, stations, or hospitals, fire-fighting equipment is one of the necessary facilities. The fire-fighting laws and regulations also stipulate that buildings in various places with different purposes. When the floor area exceeds a certain area, It is necessary to install various automatic fire extinguishing equipment in accordance with the provisions of [Standards for Fire Safety Equipment Installation in Various Places]. In the automatic fire extinguishing equipment, water system fire extinguishing equipment is the main one, accounting for more than 90%; including indoor fire hydrant fire extinguishing equipment, outdoor fire hydrant fire extinguishing equipment, automatic sprinkler fire extinguishing equipment, water mist automatic fire extinguishing equipment, foam automatic fire extinguishing equipment, In order to extinguish the fire at the first time, or at least control the fire before the firefighters arrive to avoid spreading. The above-mentioned common fire-fighting systems that use water as a fire extinguishing system must be equipped with a fire-fighting pump automatic pressurization unit in addition to the installation of sufficient water source capacity and the operation of the pipe system to ensure sufficient pressure to extinguish the fire. Usually, the owner of a building must install water system fire extinguishing equipment under the provisions of the [standards for setting fire safety equipment in various places]; on the one hand, to increase the usable area and on the other hand to stabilize the center of gravity of the building, most of them are The selection is shown in Figure 1. A fire-fighting pool 2 is set under the ground floor of the building or under the ground 1.

Since the fire tank 2 is usually set below the ground, or even below the underground parking lot, at the bottom of the building, and the fire tank 2 has a certain depth, if the fire pump 4 chooses to sink Water-type motors are bound to be difficult to inspect and maintain. Therefore, the Fire Protection Law stipulates that the fire pump automatic pressurizing unit must be above-ground. If the water source of the fire extinguishing equipment pool of the fire fighting water system is lower than the fire pump automatic pressurizing unit, a downward suction pipe 7 is required to draw the fire water in the fire pool 2 upward.

When there is air in the suction pipe 7, the fire-fighting pump cannot extract fire-fighting water. In order to maintain the function of the suction pipe 7 being filled with water at any time, a bottom valve 8 is installed at the lowest part of the suction pipe 7, and it is matched with an above-ground fire pump The water supply tank of the Pu automatic pressurizing unit (commonly known as the water tank in the fire fighting industry) (unidirectional flows into the suction pipe 7, so the suction pipe 7 is filled with water at any time. The function of the bottom valve 8 is to allow water to flow only from the fire fighting pool 2 to the suction pipe 7. It cannot flow from the suction pipe 7 back to the fire pool 2 so that the suction pipe 7 and the fire pipeline are filled with fire fighting water at any time to prevent the fire extinguishing equipment of the fire water system from being unable to pump water to extinguish the fire, and even the pump 4 may be damaged due to idling.

Due to the long piping system and high pressure of the fire extinguishing equipment of the fire fighting water system, water hammer often occurs. Therefore, the material of the foot valve for fire fighting must meet the requirements of CNS6445 (pressure resistance 10KG/CM2) and above, which also results in the volume of the foot valve It is heavy and the bottom valve is deeply buried in the water for a long time. On the one hand, it is difficult to inspect, and on the other hand, if there is a failure and need to be repaired and replaced, if the water in the fire tank 2 is not drained and the maintenance personnel enter the repair, it is necessary to The suction pipe 7 and the bottom valve 8 are lifted to the ground for replacement. Because the weight of the suction pipe 7 is heavier, it needs to be hung with a sling. This requires a lot of manpower; especially some suction pipes 7 are fixed to the ground with cement For the fire tank 2, it takes a lot of effort to destroy the cement encapsulation before the suction pipe 7 and the bottom valve 8 can be taken out together for maintenance.

Usually the life of the bottom valve is about 3 to 5 years. However, when inspecting most of the damaged bottom valves, the outer casting and body are usually not damaged. The main reason is that the water retaining part is damaged, but the entire set must be replaced. It takes manpower and even delays the repair time. Nowadays there is a shortage of engineering maintenance personnel Under the circumstances, the maintenance cost is increased. Because the fire extinguishing equipment of the entire fire water system adopts the method shown in Figure 1 to account for the majority, and the failure of the bottom valve, the entire system is completely disabled, and its impact cannot be underestimated.

Therefore, how to solve the above-mentioned problem of traditional bottom valve replacement, and even provide a further inspection function to ensure the smooth operation of the fire protection system, is an urgent need to study and improve the direction.

In view of the above shortcomings, the purpose of the present invention is to provide a fire-fighting pool pumpable bottom valve, which greatly improves the convenience of replacing the bottom valve and significantly reduces maintenance costs.

Another object of the present invention is to provide a removable bottom valve for a fire pool, which makes the repair and maintenance of the bottom valve feasible and greatly improves the reliability of the fire fighting system.

Another object of the present invention is to provide a water pumping system with a fire-fighting pool pumpable bottom valve, which not only provides a structure that is easy to replace and operates, but also facilitates maintenance personnel to repair or replace the bottom valve from outside the fire-fighting pool, thereby improving the safety of fire fighting equipment , It also makes the inspection and maintenance of the bottom valve feasible, and indeed improves the reliability of the fire protection system.

To achieve the above objective, the present invention provides a fire-fighting pool pumpable bottom valve, wherein the pool is set under a pump (or called a pumping pressurized pump unit), and is installed in the pool through a three-way suction component A pump on the upper part pumps the water stored in the pool upwards and pressurizes it and supplies it to a fire-fighting system pipeline or civil industrial water end. The above-mentioned three-way water absorption component includes a three-way body, a cover and a water suction pipe The three-way body has a connection end, a water outlet end connected to the pump, and a replacement end directly connected to the connection end, the cover is disposed at the replacement end, the connection end is conductively connected to the suction pipe, and the The suction pipe has a suction end sinking into the fire fighting pool, the suction pipe has a predetermined inner diameter and an inner contraction shoulder with an inner diameter smaller than the predetermined inner diameter is formed at the suction end, and the removable bottom valve includes: An outer edge larger than the above-mentioned retracted shoulder And a stop part smaller than the predetermined inner diameter; a base part connected to the stop part; a bottom valve part capable of one-way operation relative to the base part and/or the stop part, and the suction pipe can be kept in one Operates between the suction position connected to the above-mentioned pool and a closed position that closes the suction pipe and the above-mentioned pool through which the suction is connected; a traction member, one end is exposed to the cover, and the opposite end is used to drive the bottom valve The part is moved from the closed position toward the pumping position; and an access operating member, a deep end is connected to the stop part and/or the base part, and a retractable end opposite to the deep end is provided corresponding to the replacement End.

Due to the structural design of the bottom valve itself, the pool pumpable bottom valve can be easily taken out from the suction pipe. It can also be placed back down to the predetermined position in the suction pipe after inspection and confirmation, so that the bottom valve can be inspected Repair becomes feasible. On the other hand, when there is a problem with the bottom valve itself, there is no need to remove the entire set of suction pipes, and only need to repair or replace the faulty part, which greatly reduces the difficulty of replacement and replacement and the processing cost.

The present invention also provides a water pumping system with a fire-fighting pool pumpable bottom valve for drawing water stored in a fire-fighting pool upwards and supplying it to a fire-fighting system as fire-fighting water. The water pumping system includes: a pump that provides The power for pumping up the water stored in the fire fighting pool; a three-way water absorption component, including a three-way body, with a connecting end, a water outlet leading to the pump, and a replacement end directly connected to the connecting end; A cover, the cover is arranged at the replacement end; and a suction pipe, which is conductively connected to the connection end, has a suction end sinking into the fire tank, and has a predetermined inner diameter and is formed with a water suction end An inner shrinkage shoulder portion having an inner diameter smaller than the predetermined inner diameter; and a removable bottom valve, including a stopper portion having an outer edge larger than the inner shrinkage shoulder portion and smaller than the predetermined inner diameter; a base connecting the stopper portion Seat part; a bottom valve part that can act one-way relative to the above-mentioned base part and/or the stop part, which can retain the above-mentioned suction pipe and upper part The fire-fighting pool is connected to the pumping position and a closed position that closes the water suction pipe and the fire-fighting pool. A traction member, one end is exposed to the cover, and the opposite end is used to drive the bottom The valve portion is moved from the closed position toward the pumping position; and an access operating member, a deep end is connected to the stop portion and/or the base portion, and a retractable end opposite to the deep end is provided corresponding to the Replace the end.

Compared with the prior art, the water pumping system with the removable bottom valve of the fire pool disclosed in the present invention can easily take out the bottom valve part to be repaired or inspected through the replacement end of the three-way body, and wait for repair or replacement. Then, insert the bottom of the suction pipe from the replacement end to increase the speed of repairing the bottom valve part and increase the safety of fire-fighting equipment; in particular, this structural change makes the inspection of the removable bottom valve feasible and can greatly improve The overall safety and reliability of the fire fighting system achieves the purpose of the invention. Of course, the removable bottom valve disclosed in the present invention is not only suitable for fire-fighting pools, but also for pumping water in underground pools or wells.

1‧‧‧Ground

2.15‧‧‧Fire pool

3.16‧‧‧Water Tower

4. 11‧‧‧Pump

5. 17‧‧‧Sprinkler pipeline

6.18‧‧‧Automatic sprinkler equipment

7, 123‧‧‧Suction pipe

8‧‧‧Bottom valve

10‧‧‧Water pumping system

12‧‧‧Three-way water absorption component

13‧‧‧Withdrawable foot valve

14‧‧‧Antifouling filter

121‧‧‧Three-way body

122、522‧‧‧Cover

124‧‧‧Suction end

125、525‧‧‧Retracted shoulder

31‧‧‧Connecting terminal

32‧‧‧Water outlet

33、53‧‧‧Replacement end

35‧‧‧Manual exhaust valve

36‧‧‧Handle

131、531‧‧‧Bottom valve part

132, 532‧‧‧Base

133、533‧‧‧stop part

134、534‧‧‧Towing parts

135‧‧‧Access control

136‧‧‧In-depth

137‧‧‧Retractable end

41‧‧‧Flange

42‧‧‧Water stop rubber pad

43‧‧‧Screw assembly

51‧‧‧Circulation space

Figure 1 is a schematic diagram of a prior art fire protection system.

Fig. 2 is a schematic diagram of the first preferred embodiment of the water pumping system with the pumpable bottom valve of the fire pool.

Fig. 3 is a schematic diagram of the first preferred embodiment of the pumpable bottom valve of the fire water pool in this case.

4 is a schematic diagram of the structure of the embodiment in FIG. 3 after being decomposed.

5A to 5C are schematic diagrams of the bottom valve part in the embodiment of FIG. 3.

Fig. 6 is a schematic diagram of the second preferred embodiment of the pumpable bottom valve of the fire pool in this case.

7A to 7C are schematic diagrams of the bottom valve part in the embodiment of FIG. 6.

The following specific examples illustrate the implementation of the present invention. Those familiar with the art can easily understand the advantages and effects of the present invention from the content disclosed in this specification.

The structure, ratio, size, etc. shown in the drawings in this specification are only used to match the disclosure content of the specification for the understanding and reading of those familiar with the art, and are not used to limit the implementation of the present invention. Any structural modification, size adjustment, or change in the proportional relationship shall be regarded as the scope covered by the present invention without substantially changing the technical content.

The first preferred embodiment of the water pumping system with a pumpable bottom valve for a fire pool of the present invention is shown in FIG. 2. The pumping system 10 includes a pump 11, a three-way suction component 12, a pumpable bottom valve 13, and an antifouling The filter screen 14, in this example, the water pumping system 10 is used for a fire fighting system. The fire fighting system includes a fire tank 15, a water tower 16, a sprinkler line 17, and an automatic sprinkler 18. When the automatic sprinkler 18 is triggered by the heat of the fire sprinkler head to start continuous sprinkling, the sprinkler pipe 17 and its connected pressure barrel will gradually reduce the pressure. When the pressure of the pressure barrel drops to the pressure switch activation value, the pump control panel Start the pump operation, the pump 11 will pump the water in the fire pool 15 upwards and pressurize it to the sprinkler line 17 through the three-way suction component 12 and the extractable bottom valve 13, and continue to the fire source through the automatic sprinkler 18 Pressurize the fire.

Please refer to Figures 3 and 4 at the same time. The main function of the pumpable bottom valve 13 is to restrict the water stored in the fire pool 15 to flow toward the pump 11 in one direction, which means that when the pump 11 pumps the water in the fire pool 15 When storing water, the bottom valve portion 131 of the pumpable bottom valve 13 will be pushed to the pumping position by the upward water flow, so that the water can flow to the pump 11. Once the pump 11 stops pumping, the bottom valve portion 131 will be affected. Gravity and downward water flow push to the closed position so that the water cannot flow back to the fire pool 15.

The three-way water absorption assembly 12 includes a three-way body 121, a cover 122, and a water suction pipe 123. The three-way body 121 has a connection end 31, a water outlet end 32 that is connected to the pump 11, and a replacement end 33 that passes through the connection end 31. The replacement end 33 is provided with a cover 122. After the cover 122 is opened, the removable bottom valve 13 can be removed for repair or maintenance. In order to facilitate repair and maintenance, the cover 122 can be made of metal material or used Made of transparent acrylic or strengthened glass, maintenance personnel can easily observe the internal condition of the tee body 121. In this example, the cover 122 is additionally provided with a manual exhaust valve 35 and a handle 36. The manual exhaust valve 35 can discharge the air inside the suction pipe during maintenance and repairs, so as to prevent air remaining in the pipe from obstructing water extraction. .

The connecting end 31 is connected to the suction pipe 123. In this example, the straight pipe connecting the connecting end 31 of the three-way body 121 to the replacement end 33 is selected to have a predetermined inner diameter of the same size as the suction pipe 123. The suction pipe Opposite to the above-mentioned connecting end 31, 123 has a water suction end 124 that sinks into the fire fighting pool 15, and the water suction end 124 is formed with a retracted shoulder 125 whose inner diameter is smaller than the predetermined inner diameter of the suction pipe 123. In this example, the water suction end 124 is additionally provided with an anti-fouling filter 14 to prevent impurities in the fire pool 15 from flowing into the suction pipe 123 from the bottom valve portion 131. However, as those skilled in the technical field of this case can easily understand, even if the inner diameter between the connecting end 31 and the replacement end 33 of the three-way body 121 is larger than the predetermined inner diameter, or the connecting end 31 to the replacement end 33 is slightly bent As long as the pumpable bottom valve can be allowed to pass, it will not hinder the implementation of the present invention.

In this example, the connecting end 31, the water outlet end 32, and the replacement end 33 are respectively connected to the suction pipe 123, the pump 11, and the cover 122 by a common flange connection. The two ends of the connection are connected by a method. In the flange 41, a water-stop rubber gasket 42 is arranged between the two flanges 41, and the flanges 41 at both ends are fixedly connected by a screw assembly 43.

Please refer to FIGS. 5A to 5C at the same time. FIGS. 5A to 5C are schematic diagrams of the lower half of the removable bottom valve 13, where FIG. 5A is a top view, and FIGS. 5B to 5C are the positions of the bottom valve portion 131 when it is actuated. Schematic. The removable bottom valve 13 includes a bottom valve portion 131, a base portion 132, a stop portion 133, a traction member 134 and an access operating member 135. The stop portion 133 in this example is ring-shaped, and the outer edge of the ring is larger than the retracted shoulder portion 125 and smaller than the predetermined inner diameter of the suction pipe 123, so that the base portion 132 and the bottom valve portion 131 will be blocked by gravity It is fixed to the inside of the water suction pipe 123 at the position of the stopper 133 and does not fall from the suction end of the water suction pipe 123. The base portion 132 is connected to the stop portion 133, and the overall outer profile of the base portion 132 is smaller than the retracted shoulder portion 125. When the base portion 132 is blocked by the stop portion 133, the base portion 132 is exposed于Suction pipe 123.

In this example, the bottom valve portion 131 is fixed by the base portion 132 in the horizontal direction, and can only slide up and down in the direction of gravity, so that it can move up and down relative to the base portion 132 and/or the stopper 133. When the pump When the Pu 11 pumps water, as shown in Figure 5B, the bottom valve portion 131 is driven by the water flow to move upward to the pumping position, so that a space for water circulation is formed between the base portion 132 and the bottom valve portion 131, so that the suction pipe 123 and the fire pool 15 is turned on and the pump 11 stops pumping, as shown in Fig. 5C, the bottom valve portion 131 is pushed by gravity and the gravity of the water flow in the pipe to move to the closed position, so that the water between the suction pipe 123 and the fire pool 15 cannot flow. This one-way opening ensures that the suction pipe 123 is filled with water at all times, and prevents the pump 11 from idling and overheating due to the air in the suction pipe 123, which makes it difficult for the motor to pump the water in the pipe.

The bottom valve portion 131 of the removable bottom valve 13 has been immersed in the water of the fire pool 15 for a long time. Once it is damaged or damaged, in order to facilitate the removal of the bottom valve portion 131, the deep end 136 of the access operating member 135 is connected to the stop portion 133 and/ Or the base portion 132, the retractable end 137 opposite to the deep end 136 is set at the replacement end 33. When the cover 122 is opened, the access operating member 135 can be pulled up so that the bottom valve portion 131 can absorb water along The pipe 123 and the tee body 121 are taken out for maintenance or repair. In order to make the stopper 133 and the suction pipe 123 in an airtight state, the access operating member 135 can be additionally provided with an elastic structure such as a spring near the cover 122. The elastic force of the elastic structure makes the stopper 133 and The suction pipes 123 are tightly connected to avoid water leakage when the bottom valve portion 131 is displaced to the closed position.

Sometimes in order to detect whether the pump 11 can start pumping when the water storage level of the water tower 16 drops below the predetermined water level, or when the bottom valve part 131 has foreign matter that causes the suction pipe 123 to leak, it is necessary to manually operate the bottom valve part 131 , To clean the foreign matter or connect the suction pipe 123 with the fire tank 15 so that the water in the water tower 16 and the fire pipe will return to the fire tank from the suction pipe 123 due to gravity, forcing the water level of the water tower 16 to drop below the predetermined water level, and then Trigger pump 11 to start. In order to be able to manually operate the bottom valve portion 131, one end of the traction member 134 passes through the cover 122 from the inside of the three-way body 121 and is connected to the handle 36. Therefore, the bottom valve portion 131 can be forced to open from the outside of the cover 122, and the traction member 134 The other end is connected to the bottom valve portion 131 for driving the bottom valve portion 131 from the closed position to the pumping position. The cover 122, the handle 36 and the traction member 134 are airtight and leak-proof, which can prevent the pump 11 from sucking in air and causing damage to the pump blades. At the same time, external air will not enter the suction pipe 123 due to the operation of the handle 36 .

However, as those skilled in the art can easily understand, the fire-fighting pool pumpable bottom valve of this case is not limited to the above-mentioned structure. The second preferred embodiment of this case is shown in FIGS. 6 and 7A to 7C, which are the same as the previous example. The features are not repeated in this example. In this example, the bottom valve portion 531 of the removable bottom valve is composed of two sheet-like structures and its base portion 532. One side of the two sheet-like structures is pivotally connected to the base. The seat part 532 and the base part 532 are only the pivot part in the middle of the bottom valve parts 531 on both sides, and the pivot ends of the base part 532 are the stop parts 533 in this example, due to the length of the pivot part It is larger than the inner diameter of the retracted shoulder 525, so that the pumpable bottom valve can be stopped at the position of the retracted shoulder 525 of the suction pipe.

When the pump pumps water, as shown in FIG. 7B, the bottom valve portion 531 is driven upward by the water flow, so that the bottom valve portion 531 pivots upward to the pumping position and forms a circulation space 51 as shown in FIG. 7B. When the pump stops pumping, As shown in FIG. 7C, the bottom valve portion 531 is affected by gravity and the water flow back down by gravity Move, the bottom valve portion 531 pivots downward to the closed position. In this example, the traction member 534 is arranged inside the replacement end 53, so that after the cover 522 is opened from the replacement end 53, the bottom valve portion 531 can be controlled to act in the pumping position and the closed position.

In summary, the fire-fighting pool pumpable bottom valve provided by the present invention can replace the pumpable bottom valve without removing the suction pipe, so that the replacement or maintenance process is faster; and it has a fire-fighting pool pumpable bottom valve. The water pumping system of the bottom valve can effectively reduce the maintenance cost of the water pumping system, and the three-way water suction component makes it easier for the operator to perform repair work. In particular, through the disclosure of the present invention, under the condition of being fully compatible with the existing fire fighting system, the bottom valve that was rarely maintained in the past can be regularly maintained and inspected, which greatly improves the reliability and safety of the existing fire fighting system. The fire-fighting pool pumpable bottom valve provided by the present invention can also be used for people's livelihood or industrial purposes and used in water pumping systems such as water wells, pools, fish ponds or reservoirs.

However, the above are only the preferred embodiments of the present invention, and cannot be used to limit the scope of implementation of the present invention. All simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the contents of the specification should remain It falls within the scope of the present invention. After the description of the preferred embodiments of the present invention, those familiar with this technical field should be able to understand that this case is indeed a novel, progressive, and industrially applicable invention with deep development value.

10‧‧‧Water pumping system

11‧‧‧Pump

12‧‧‧Three-way water absorption component

13‧‧‧Withdrawable foot valve

14‧‧‧Antifouling filter

15‧‧‧Pool

16‧‧‧Water Tower

17‧‧‧Sprinkler line

18‧‧‧Automatic water supply/sprinkler equipment

Claims (9)

A pumpable bottom valve for a fire-fighting pool, wherein the fire-fighting pool is set underground, and the water stored in the fire-fighting pool is pumped upwards and supplied to the fire-fighting pool through a three-way water suction component and a pump arranged outside the fire-fighting pool A fire fighting system. The three-way water absorption assembly includes a three-way body, a cover, and a water suction pipe. The three-way body has a connection end, a water outlet that is connected to the pump, and a replacement directly connected to the connection end. The cover is arranged at the replacement end, the connection end is conductively connected to the suction pipe, and the suction pipe has a suction end sinking into the fire-fighting pool, the suction pipe has a predetermined inner diameter and is formed at the suction end A retractable shoulder with an inner diameter smaller than the predetermined inner diameter, and the removable bottom valve includes: a stopper with an outer edge larger than the retracted shoulder and smaller than the predetermined inner diameter; a base connecting the stopper Seat; a bottom valve portion that can act one-way relative to the base portion and/or the stop portion, can be in a water suction position that retains the connection between the suction pipe and the fire pool, and a closed water suction pipe and the fire The pool is operated between the closed positions where the pool is connected to draw water; a traction member, one end is exposed to the cover, and the opposite end is used to drive the bottom valve part from the closed position to the draw position; and an access operating member A deep end is connected to the stop part and/or the base part, and a retractable end opposite to the deep end is disposed at a position corresponding to the replacement end. As described in the first item of the scope of patent application, one end of the traction member passes through the cover from the inside of the three-way body, for controlling the bottom valve part from the outside of the cover to draw water Position and closed position. As described in item 1 of the scope of patent application, the withdrawable foot valve, wherein the traction member is arranged on the replacement Inside the end, when the cover is opened from the replacement end, the bottom valve part is controlled to act in the pumping position and the closed position. A water pumping system with a pumpable bottom valve for a fire fighting pool is used to draw up water stored in a fire fighting pool and supply it to a fire fighting system as fire fighting water. The pumping system includes: a pump for providing the fire fighting pool A three-way water absorption component, including a three-way body, with a connecting end, a water outlet leading to the pump, and a replacement end directly connected to the connecting end; a cover, The cover is provided at the replacement end; and a water suction pipe, which is conductively connected to the connection end, has a water suction end sinking into the fire fighting pool, and has a predetermined inner diameter and is formed at the water suction end with an inner diameter smaller than the above A retractable shoulder portion with a predetermined inner diameter; and a removable bottom valve, comprising a stop portion with an outer edge larger than the retracted shoulder portion and smaller than the predetermined inner diameter; a base portion connected to the stop portion; The bottom valve part, which can act one-way with respect to the above-mentioned base part and/or the stop part, can be located at a suction position that keeps the connection between the suction pipe and the fire-fighting pool and a closed water suction pipe and the fire-fighting pool. A traction member, one end is exposed to the cover, and the opposite end is used to drive the bottom valve portion from the closed position toward the pumping position; and an in and out operating member, a deep end Connected to the stop portion and/or the base portion, On the contrary, a retractable end, which is opposite to the above-mentioned deep end, is arranged at a position corresponding to the above-mentioned replacement end. As described in item 4 of the scope of patent application, the water pumping system further includes an anti-fouling filter screen disposed at the water suction end, thereby blocking impurities in the fire fighting pool from flowing into the water suction pipe from the bottom valve portion. For the water pumping system described in item 4 of the scope of patent application, the cover includes a manual exhaust valve for exhausting the air inside the water suction pipe during maintenance. According to the water pumping system described in item 4 of the scope of patent application, the cover includes a handle connected to the traction member for operating the traction member from outside the cover. According to the water pumping system described in item 4 of the scope of patent application, the connection end, the water outlet end and the replacement end are respectively connected to the suction pipe, the pump and the cover by a plurality of screw assemblies. For the water pumping system described in item 4 of the scope of patent application, wherein the connection end, the water outlet end and the replacement end are respectively provided with a water-stop rubber pad between the suction pipe, the pump and the cover.

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