Portable fire pump

Abstract

The portable fire pump comprises a tank body arranged on a centrifugal pump, a vertical pipe and a transverse pipe which are communicated with each other are arranged on the tank body, a pipe bottom is arranged on the transverse pipe, a discharging opening is fixedly formed in the end face of the outer wall of the pipe bottom, a valve plate is arranged at an end opening of the vertical pipe in a sliding mode, and a valve pipe inserted into the discharging opening is fixedly installed on the valve plate. The side wall of the valve pipe is provided with a circumferential opening, a lower rod is arranged in the valve pipe in a sliding mode, and the side wall of the lower rod is provided with a plurality of flow channels communicated with the tank body. According to the portable fire pump provided by the invention, when the internal pressure of the pump is reduced due to blockage of the end part of the water inlet pipe, the valve plate loses water pressure impact and moves into the transverse pipe, and the lower end opening of the vertical pipe is gradually opened, so that water in the transverse pipe is shunted and enters the tank body to be stored, the water in the centrifugal pump is emptied in advance, and the impeller is in an idle state; the situation that the impeller is damaged when the impeller stirs blocked water is effectively reduced, and damage to engine loads can also be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of fire-fighting centrifugal pumps, in particular to a portable fire-fighting water pump. Background Art

[0002] Fire water pumps often use centrifugal pumps, which use the rotation of the impeller to cause water to undergo centrifugal motion to achieve the purpose of water delivery. Changing the shape of the impeller can also meet the purpose of conveying solid objects. To a certain extent, it can reduce pump blockage and ensure the safe use of fire pumps during fire extinguishing.

[0003] According to the publication (announcement) number: CN116378971B, the publication (announcement) date: 2024-01-23, an automatic liquid storage device for a self-priming centrifugal pump is disclosed.

[0004] In the prior art including the above-mentioned patent, when the filter cover at the end of the water inlet pipe is at the bottom of the river channel, the silt and debris at the bottom of the river can easily cause blockage to the filter cover, and the filter cover still has some pores for pumping water, but these pores will increase the suction force due to the difficulty in pumping water, and for the impeller, greater power is required for suction under low pressure, consuming the impeller blades and engine power. At the same time, the greater suction force will gradually aggravate the blockage problem of the filter cover until the water outlet is cut off. However, in this process, the impeller and the engine of the pump body have been damaged. In severe cases, the impeller is damaged and the engine fails, making it impossible to carry out normal firefighting work. Summary of the invention

[0005] The object of the present invention is to provide a portable fire-fighting water pump, aiming to solve the above-mentioned problems.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A portable fire water pump comprises a base provided with an engine and a centrifugal pump, and also comprises a tank body provided on the centrifugal pump, wherein the tank body is provided with a vertical pipe and a horizontal pipe which are interconnected;

[0008] The horizontal tube is provided with a tube bottom, a discharge port is fixedly installed on the outer wall end surface of the tube bottom, a valve plate is slidably provided on the vertical tube port, and a valve tube plugged into the discharge port is fixedly installed on the valve plate, and a circumferentially arranged opening is opened on the side wall of the valve tube;

[0009] A lower rod is slidably arranged in the valve tube, and a plurality of flow channels connected to the tank body are opened on the side wall of the lower rod;

[0010] The valve plate is closed by the water pressure in the centrifugal pump, and the lower rod closes the opening and the valve pipe closes the discharge port synchronously. Conversely, the valve plate opens the tank body, so that the flow channel connects to the opening to replenish water into the horizontal pipe.

[0011] Preferably, a floating plate located in the tank body is fixedly mounted on the lower rod, and the floating plate cooperates with the diverted water in the opened tank body.

[0012] Preferably, the tank body is provided with a screw cap which is threadedly connected, the screw cap is provided with an upper rod, and the lower rod is provided with a rod hole which is plugged and matched with the upper rod.

[0013] Preferably, a locking rod is provided in the rod hole and is radially movable due to being abutted by the end of the upper rod, so that the locking rod is plug-fitted into the opening.

[0014] Preferably, a concave ring is provided at the end of the valve tube, and the concave ring moves outside the discharge port to enable the valve plate to slide off the vertical pipe.

[0015] Preferably, symmetrically arranged support plates are provided in the vertical pipe, and a tension spring connected to the support plates is provided on the valve plate.

[0016] Preferably, the support plate cooperates with the floating plate in the active state.

[0017] Preferably, the valve plate is driven into the transverse pipe, so that the stored water in the drainage tank at the bottom of the pipe is discharged into the centrifugal pump, and the diverted stored water is connected to the matching opening.

[0018] Preferably, the valve plate closes the tank body as the tension spring returns to its original position, and guides the gas to connect the flow channel and the cross pipe.

[0019] Preferably, the flow channel diverts the gas to be connected to an opening and is used to connect to the valve tube.

[0020] In the above technical scheme, a portable fire-fighting water pump provided by the present invention has the following beneficial effects: when the internal pressure of the pump is reduced due to blockage at the end of the water inlet pipe of the centrifugal pump, the valve plate loses the water pressure impact and moves into the horizontal pipe, with the purpose of gradually opening the lower port of the vertical pipe, so as to divert the water in the horizontal pipe into the tank for storage, thereby emptying the water inside the centrifugal pump in advance and putting the impeller in an idling state, effectively reducing the situation where the impeller stirs the blocked water and damages the impeller, and also reducing the damage to the engine load. The water outlet pipe of the centrifugal pump can be cut off in advance, and the blockage problem at the end of the water inlet pipe can be quickly known visually. At the same time, the different sounds produced by the idling of the impeller can also assist in the judgment, thereby cutting off the water outlet pipe in advance so as to protect the impeller and the engine. Compared with the lower rod that remains fixed in the vertical direction, the opening position of the downward-moving valve pipe is actively lower than the end of the lower rod. The purpose is to allow the water in the horizontal pipe to enter the valve pipe through the opening, so that the water can be discharged when the lower end of the valve pipe extends out of the discharge port, so that part of the water drips down to the ground, which is used to assist in judging the blockage problem of the water inlet pipe and enhance the response ability of the centrifugal pump during operation. At the same time, the lower rod moves upward, so that the upper end of the flow channel enters the vertical pipe, that is, it is connected to the tank body, and part of the lower end of the flow channel stays at the opening, which is used to allow part of the stored water in the tank body to flow back to the bottom of the pipe and flow into the water inlet pipe through the inner wall of the centrifugal pump, that is, it does not interfere with the normal idling of the impeller, so that part of the water added in the water inlet pipe can facilitate the centrifugal pump to start pumping water again, thereby improving the working efficiency of the centrifugal pump and ensuring the safety of the fire extinguishing scene. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of a fire water pump from the right side according to an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the right side of a fire water pump and a tank provided in an embodiment of the present invention;

[0024] Figure 3 A front cross-sectional schematic diagram of a tank body and its upper vertical pipe and horizontal pipe provided in an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of a tank body and its upper vertical pipe and horizontal pipe provided by an embodiment of the present invention, viewed from the right side from the front;

[0026] Figure 5 for Figure 4 A magnified schematic diagram of point A;

[0027] Figure 6 An exploded schematic diagram of an upper rod, a lower rod and a valve pipe in a vertical pipe provided in an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1. Base; 11. Bracket; 2. Engine; 21. Centrifugal pump; 3. Tank; 31. Vertical pipe; 311. Support plate; 32. Horizontal pipe; 321. Pump port; 33. Pipe bottom; 331. Discharge port; 4. Valve plate; 40. Valve hole; 41. Valve pipe; 42. Opening; 43. Concave ring; 5. Screw cap; 51. Upper rod; 52. Lower rod; 521. Rod hole; 522. Flow channel; 53. Floating plate; 54. Lock rod. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] like Figure 1-6 As shown, a portable fire water pump comprises a base 1 provided with an engine 2 and a centrifugal pump 21, and also comprises a tank body 3 provided on the centrifugal pump 21, and the tank body 3 is provided with a vertical pipe 31 and a horizontal pipe 32 which are interconnected;

[0032] The horizontal tube 32 is provided with a tube bottom 33, and a discharge port 331 is fixedly installed on the outer wall end surface of the tube bottom 33. A valve plate 4 is slidably provided at the end of the vertical tube 31, and a valve tube 41 inserted into the discharge port 331 is fixedly installed on the valve plate 4. The side wall of the valve tube 41 is provided with openings 42 arranged circumferentially.

[0033] A lower rod 52 is slidably disposed in the valve tube 41, and a plurality of flow channels 522 connected to the tank body 3 are opened on the side wall of the lower rod 52;

[0034] The valve plate 4 is pressurized by the centrifugal pump 21 to close the tank body 3 , and simultaneously causes the lower rod 52 to close the opening 42 and the valve pipe 41 to close the discharge port 331 . Conversely, the valve plate 4 opens the tank body 3 , and causes the flow channel 522 to communicate with the opening 42 to replenish water into the transverse pipe 32 .

[0035] Specifically, the centrifugal pump 21 and the engine 2 are both detachably mounted on the base 1, and the impeller in the centrifugal pump 21 is driven by the output shaft of the engine 2, and the tank body 3 is supported by a bracket 11 fixedly mounted on the base 1, so that the tank body 3 filled with water can remain stable under the action of the bracket 11.

[0036] Furthermore, the cross section of the end of the horizontal pipe 32 is in an arc shape, and the cross section port is a pump port 321, so that the cutout can be adapted to be installed on the side wall of the centrifugal pump 21, and a notch connected to the pump port 321 is opened on the side wall of the centrifugal pump 21 to allow water to be transmitted and flowed. The cross section of the pipe bottom 33 is fan-shaped, so that the water added into the vertical pipe 31 by the centrifugal pump 21 through the horizontal pipe 32 can be deposited, so that suspended dirt in the water stays at the pipe bottom 33, reducing the interference of dirt on the operation of the valve pipe 41.

[0037] Furthermore, a valve hole 40 of the same size as the inner diameter of the valve tube 41 is provided on the valve plate 4, so that the lower rod 52 can pass through the valve hole 40 and slide in cooperation with the valve tube 41, and the flow channel 522 only exists at the position where the port is facing the centrifugal pump 21, so that when part of the water is discharged from the flow channel 522, it can quickly flow into the inner wall of the centrifugal pump 21, thereby reducing stroke waste.

[0038] Furthermore, the discharge port 331 is located at the top of the fan-shaped arc at the bottom of the pipe 33, so that when the opening 42 moves down to the upper end of the discharge port 331, the dirt gathered in the bottom of the pipe 33 can be discharged from the cross pipe 32 through the valve pipe 41, thereby discharging the dirt in the process of protecting the impeller, increasing the operating stability of the internal parts of the pipeline and reducing the corrosion problem of the parts.

[0039] When the end of the water inlet pipe of the centrifugal pump 21 is blocked and the internal pressure of the pump is reduced, the valve plate 4 loses the water pressure impact and moves into the cross pipe 32, so as to gradually open the lower end of the vertical pipe 31, so as to divert the water in the cross pipe 32 into the tank body 3 for storage, thereby emptying the water inside the centrifugal pump 21 in advance and putting the impeller in an idling state, effectively reducing the situation where the impeller stirs the blocked water and damages the impeller, and also reducing the damage to the load of the engine 2. The water outlet pipe of the centrifugal pump 21 can be cut off in advance, and it can be quickly known visually that there is a blockage problem at the end of the water inlet pipe. At the same time, the different sounds produced by the idling of the impeller can also assist in the judgment, so that the water outlet pipe is cut off in advance to protect the impeller and the engine 2. The downward-moving valve pipe 41 is more convenient to open than the lower rod 52 which remains in a fixed state in the vertical direction. The position of the opening 42 is actively lower than the end of the lower rod 52, the purpose of which is to allow the water in the horizontal pipe 32 to enter the valve pipe 41 through the opening 42, so that the water can be discharged when the lower end of the valve pipe 41 extends out of the discharge port 331, so that part of the water drips downward to the ground, which is used to assist in judging the problem of blockage of the water inlet pipe and enhance the response capability of the centrifugal pump 21 during operation. At the same time, the lower rod 52 moves upward, so that the upper end of the flow channel 522 enters the vertical pipe 31, that is, it is connected to the tank body 3, and part of the lower end of the flow channel 522 stays at the opening 42, which is used to allow part of the stored water in the tank body 3 to flow back to the bottom of the pipe 33 and flow into the water inlet pipe through the inner wall of the centrifugal pump 21, that is, it does not interfere with the normal idling of the impeller, so that part of the water added in the water inlet pipe can facilitate the centrifugal pump 21 to start pumping water again, thereby improving the working efficiency of the centrifugal pump 21 and ensuring the safety of the fire extinguishing site.

[0040] As an embodiment further provided by the present invention, a floating plate 53 located in the tank body 3 is fixedly mounted on the lower rod 52 , and the floating plate 53 cooperates with the diverted water in the opened tank body 3 .

[0041] Specifically, the water inlet port of the tank body 3 is in a closed shape so that the tank body 3 can accommodate more water in the centrifugal pump 21, accelerate the water cut-off effect of the water outlet pipe, and is used to inform the operator to quickly deal with the blockage problem to avoid damage to the impeller and the engine 2 due to the blockage problem, thereby seriously interfering with the fire extinguishing.

[0042] Furthermore, the shape of the floating plate 53 is adapted to the shape of the tank body 3 , so that the floating plate 53 has a sufficient contact surface for receiving buoyancy and does not interfere with the water flow at the end of the vertical pipe 31 .

[0043] After the valve plate 4 moves downward due to pressure, the water entering the tank body 3 from the vertical pipe 31 gradually causes the float plate 53 to move upward due to buoyancy, and causes the lower rod 52 to move in the opposite direction to the valve tube 41, thereby increasing the gap between the end of the lower rod 52 and the opening 42, further enhancing the drainage effect of the discharge port 331, achieving more efficient sewage discharge and visual reminder functions, and at the same time quickly reducing the residual water in the centrifugal pump 21 to ensure the safety of the impeller working environment.

[0044] As another embodiment further provided by the present invention, a screw cap 5 is threadedly connected to the tank body 3 , an upper rod 51 is provided on the screw cap 5 , and a rod hole 521 for plugging and matching with the upper rod 51 is opened on the lower rod 52 .

[0045] Specifically, the screw cap 5 is used to close the liquid filling port on the tank body 3. The upper end of the upper rod 51 is provided with a thread, and the thread is connected to the inner end surface of the screw cap 5, and the lower rod 52 is a part of the upper rod 51, so that the lower rod 52 can move on the upper rod 51 to perform drainage.

[0046] Furthermore, a circumferentially arranged sliding groove is opened in the rod hole 521, and a slider sliding in the sliding groove is fixedly installed on the side wall of the upper rod 51, and a tension spring is also arranged between the two, that is, the two maintain axial sliding assembly but cannot rotate circumferentially.

[0047] By removing the screw cap 5 from the liquid filling port and then pouring water into the liquid filling port, the water gradually replenishes the tank body 3 and also directly enters the vertical pipe 31, and under the direct impact of the water pressure, the valve plate 4 moves down to the horizontal pipe 32, so that the water directly enters the centrifugal pump 21 from the horizontal pipe 32, which is used to fill the centrifugal pump 21 and the water inlet pipe with water, so that the air in the pump body can be squeezed out before the water pump is started, so that the centrifugal pump 21 can quickly perform water pumping / draining work. In the process of covering the screw cap 5, the inner end face of the screw cap 5 is actively threadedly connected to the end of the upper rod 51, which is used to fix the position of the upper rod 51, ensure the sliding fit between the rod hole 521 and the upper rod 51, and the upper rod 51 with the screw cap 5 removed will not interfere with the water filling work, thereby ensuring the stability and safety of the equipment operation.

[0048] As another embodiment further provided by the present invention, a locking rod 54 is provided in the rod hole 521 and is radially movable by being abutted by the end of the upper rod 51 , and the locking rod 54 is plugged into and matched with the opening 42 .

[0049] Specifically, a protrusion is fixedly installed at the end of the locking rod 54, and the protrusion is rounded and slides against the upper rod 51 which has the same rounded end. An elastic member is fixedly installed between the protrusion and the inner wall of the rod hole 521. The elastic member can be a rubber block, an elastic metal sheet or a spring. The prior art will not be elaborated here.

[0050] The end of the upper rod 51 pushes against multiple locking rods 54 to synchronously extend out of the side wall of the lower rod 52 and insert into multiple openings 42, so that the lower rod 52 can quickly connect with the valve tube 41 for use, so that the lower rod 52 driven by buoyancy to move upward can drive the valve tube 41 to move upward. On the one hand, the valve plate 4 can close the tank body 3 that is gradually filled with water, so that the water diverted and replenished in the tank body 3 can be stored. On the other hand, the lower rod 52 moved upward by buoyancy will also open the opening 42, and the opening 42 will discharge the remaining water in the cross pipe 32 from the valve tube 41, and the water in the water inlet pipe will retreat to the water level of the river under the action of atmospheric pressure, and the water in the centrifugal pump 21 will also flow into the water inlet pipe following the retreat, so that the impeller is in a no-load working state, greatly reducing the damage to the impeller.

[0051] As another embodiment further provided by the present invention, a concave ring 43 is disposed at the end of the valve tube 41 , and the concave ring 43 moves outside the discharge port 331 to enable the valve plate 4 to slide off the vertical pipe 31 .

[0052] Specifically, the concave ring 43 is an annular depression on the side wall of the lower end of the valve tube 41 so as to be pinched and pulled down by fingers, and the concave ring 43 is always below the discharge port 331 during the up and down movement of the valve tube 41 .

[0053] The valve tube 41 is manually pulled down through the concave ring 43, so that the valve plate 4 is driven by the pulling force to enter the cross pipe 32, and the floating plate 53 is immersed in the water of the tank body 3 at this time. The purpose is to send the water stored in the tank body 3 during the water cut-off process into the centrifugal pump 21, so that this part of the stored water can be used to squeeze out the air in the centrifugal pump 21. There is no need to remove the screw cap 5 again to add water to the centrifugal pump 21, and the water stored in the diversion in the tank body 3 can be used for the second start and multiple starts, thereby shortening the start-up time required for the fire water pump to work again and improving the operating efficiency.

[0054] As another embodiment further provided by the present invention, symmetrically arranged support plates 311 are provided in the vertical pipe 31 , and a tension spring connected to the support plates 311 is provided on the valve plate 4 .

[0055] Specifically, a telescopic rod is fixedly installed between the support plate 311 and the valve plate 4, and the telescopic rod is located between two adjacent tension springs so that the tension is evenly distributed.

[0056] The support plate 311 is provided to provide a limit for the movement of the valve plate 4. The valve plate 4 can be reset to seal the tank body 3 in cooperation with the tension spring, thereby reducing the intrusion of residual water vapor in the tank into the centrifugal pump 21 and causing corrosion of the impeller. It is convenient to open the valve plate 4 due to the impact force generated by water filling during initial startup, and it is also convenient for the valve plate 4 to enter the cross pipe 32 to store water in the tank body 3 after the pressure is reduced, thereby increasing the working capacity of the valve plate 4.

[0057] As another embodiment further provided by the present invention, the support plate 311 cooperates with the floating plate 53 in the active state.

[0058] Specifically, one end of the support plate 311 is fixedly connected to the inner wall of the vertical pipe 31 , and the other end faces the interior of the tank body 3 .

[0059] Furthermore, there is a predetermined angle between the floating plate 53 and the horizontal plane, and the angle is located at the position of the lower rod 52 , that is, the floating plate 53 is in a tilted state in the tank body 3 .

[0060] The support plate 311 placed horizontally at the closed position of the tank body 3 can block the dirt in the tank body 3, reducing the possibility of dirt clogging the vertical pipe 31, and in the process of manually pulling down the valve tube 41, the opening 42 actively pulls down the floating plate 53 through the locking rod 54, and after the upper rod 51 is separated from the locking rod 54, the lower rod 52 is disconnected from the valve tube 41. At this time, the floating plate 53 still moves with the drop of water level, but as the water in the tank is quickly discharged from the lower end of the vertical pipe 31, the inclined floating plate 53 provides an oblique thrust, which causes the dirt floating on the water surface in the tank to accumulate at the tilted position of the floating plate 53, reducing the occurrence of dirt entering the vertical pipe 31 before the water in the tank is drained, thereby increasing the possibility of clogging. The tank body 3 can also be responsible for collecting dirt, thereby increasing the working safety of components.

[0061] As another embodiment further provided by the present invention, the valve plate 4 is driven into the transverse pipe 32 , so that the pipe bottom 33 drains the stored water in the tank body 3 into the centrifugal pump 21 , and the diverted stored water is connected to the matching opening 42 .

[0062] The water stored in the tank body 3 flows into the cross pipe 32 through the valve plate 4 that is pulled downward, so that the water can be replenished in the centrifugal pump 21 for restarting. Before that, the downward opening 42 is at the upper end position of the discharge port 331, so that the water discharged from the lower discharge of the tank body 3 first flushes the position of the pipe bottom 33 and is discharged from the discharge port 331, which is used to clean the dirt retained in the cross pipe 32 and reduce the dirt from entering the centrifugal pump 21 and causing corrosion damage to the parts inside the pump. Secondly, during the manual pulling process, the lower rod 52 and the upper rod 51 are disengaged from the locked matching state, and as the lower rod 52 moves downward with the water level dropping, the end of the lower rod 52 can still provide the opening 42 with drainage, so that this part of the stored water is used for cleaning and drainage before the second or multiple starts, and the opening 42 is gradually blocked during the lower movement of the lower rod 52 to block the drainage of the discharge port 331, so as to send the stored water into the centrifugal pump 21 to squeeze out the air.

[0063] As another embodiment further provided by the present invention, the valve plate 4 blocks the tank body 3 as the tension spring is reset, and guides the gas to connect the flow channel 522 and the cross pipe 32 .

[0064] After the water pump has been used, clean water is poured into the tank body 3 for cleaning the centrifugal pump 21. After the cleaning is completed, the valve tube 41 is pulled down to the maximum stroke, and the tension spring is reset after the maximum storage capacity is used to make the valve plate 4 return to the vertical pipe 31 to squeeze the internal gas of the tank body 3, and the screw cover 5 is used to close the liquid filling port of the tank body 3, so that the gas in the tank body 3 can only flow from the flow channel 522 to the opening 42, so that the air flow can be quickly blown into the cross pipe 32, so as to perform air blowing and drying treatment on the parts in the cross pipe 32, reduce the rust caused by the residual water vapor around the cross pipe 32 and the centrifugal pump 21, thereby solving the durability of the difficult-to-disassemble and assemble position in the pump and reducing the damage problem caused by the water pump being placed for a long time.

[0065] As another embodiment further provided by the present invention, the flow channel 522 is connected to the opening 42 for diverting gas and is used to connect to the valve tube 41 .

[0066] Specifically, since the lower end of the flow channel 522 in the default state is connected to the opening 42 and the upper end is closed by the inner wall of the valve tube 41, water will not penetrate into the tank body 3 during the water delivery process of the centrifugal pump 21, thereby preventing the tank body 3 from being unable to store water and affecting the protection of the impeller and the restarting of the centrifugal pump 21.

[0067] The valve plate 4 returns to the front of the vertical pipe 31 due to the reset of the tension spring, and the upper end of the flow channel 522 is connected to the vertical pipe 31, while the lower end is blocked by the inner wall of the valve tube 41. When the flow channel 522 returns to the default position, the gas compressed by the valve plate 4 in the tank body 3 is diverted into the flow channel 522, and the flow channel 522 is connected to the vertical pipe 31 and the opening 42 at the same time, so that the airflow entering the opening 42 can be diverted into the valve tube 41, and part of the airflow is also blown around the opening 42, so as to use the airflow to dry the lower rod 52 and the valve tube 41, reduce the erosion of the sealing rubber ring around the valve tube 41 by the residual liquid, reduce the difficulty and frequency of maintenance of the pump body, and improve the service life of the equipment.

[0068] Working principle: when the water inlet pipe end of the centrifugal pump 21 is blocked and the internal pressure of the pump is reduced, the valve plate 4 loses the water pressure impact and moves into the cross pipe 32, the purpose is to gradually open the lower end of the vertical pipe 31, so as to divert the water in the cross pipe 32 into the tank body 3 for storage, so as to empty the water inside the centrifugal pump 21 in advance, put the impeller in an idling state, effectively reduce the situation where the impeller stirs the blocked water and damages the impeller, and also reduce the damage to the load of the engine 2. Compared with the lower rod 52 that remains in a fixed state in the vertical direction, the downward-moving valve pipe 41 has an opening 42 position that is actively lower than the end of the lower rod 52, the purpose is to allow the water in the cross pipe 32 to enter the valve pipe 41 through the opening 42, so that the water can be discharged when the lower end of the valve pipe 41 extends out of the discharge port 331, so that part of the water drips downward to the ground, which is used to assist in judging the problem of water inlet pipe blockage. At the same time, when the lower rod 52 moves upward, it is used to make The upper end of the flow channel 522 enters the vertical pipe 31, that is, it is connected to the tank body 3, and a part of the lower end of the flow channel 522 stays at the opening 42, which is used to allow part of the stored water in the tank body 3 to flow back downward to the bottom of the pipe 33 and flow into the water inlet pipe through the inner wall of the centrifugal pump 21, that is, it does not interfere with the normal idling of the impeller, so that the part of the water added in the water inlet pipe can facilitate the centrifugal pump 21 to start pumping water again, thereby improving the working efficiency of the centrifugal pump 21, and manually pull down the valve tube 41 to drive the valve plate 4 to enter the horizontal pipe 32 by the pulling force, and the floating plate 53 at this time is immersed in the water of the tank body 3, the purpose is to send the water stored in the tank body 3 during the water cut-off process into the centrifugal pump 21, so that this part of the stored water is used to squeeze out the air in the centrifugal pump 21, and there is no need to remove the screw cover 5 again to add water to the centrifugal pump 21, and the secondary start and multiple starts can use the water stored in the diversion in the tank body 3, thereby shortening the start-up time required for the fire water pump to work again.

[0069] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A portable fire water pump, comprising a base (1) provided with an engine (2) and a centrifugal pump (21), characterized in that: It also includes a tank body (3) arranged on the centrifugal pump (21), wherein the tank body (3) is provided with a vertical pipe (31) and a horizontal pipe (32) which are interconnected; The horizontal tube (32) is provided with a tube bottom (33), and a discharge port (331) is fixedly mounted on the outer wall end surface of the tube bottom (33); a valve plate (4) is slidably mounted on the port of the vertical tube (31), and a valve tube (41) inserted into the discharge port (331) is fixedly mounted on the valve plate (4), and openings (42) arranged circumferentially are opened on the side wall of the valve tube (41); A lower rod (52) is slidably disposed in the valve tube (41), and a plurality of flow channels (522) connected to the tank body (3) are provided on the side wall of the lower rod (52); The valve plate (4) is subjected to the water pressure in the centrifugal pump (21) to close the tank body (3), and synchronously causes the lower rod (52) to close the opening (42) and the valve pipe (41) to close the discharge port (331). Conversely, the valve plate (4) opens the tank body (3), and causes the flow channel (522) to communicate with the opening (42) to replenish water into the horizontal pipe (32).

2. A portable fire water pump according to claim 1, characterized in that: A floating plate (53) located in the tank body (3) is fixedly mounted on the lower rod (52), and the floating plate (53) cooperates with the diverted water in the opened tank body (3).

3. A portable fire water pump according to claim 2, characterized in that: The tank body (3) is provided with a screw cap (5) which is threadedly connected, the screw cap (5) is provided with an upper rod (51), and the lower rod (52) is provided with a rod hole (521) which is plugged and matched with the upper rod (51).

4. A portable fire water pump according to claim 3, characterized in that: The rod hole (521) is provided with a locking rod (54) which is radially movable due to being abutted by the end of the upper rod (51), and the locking rod (54) is plugged into and matched with the opening (42).

5. A portable fire water pump according to claim 3, characterized in that: A concave ring (43) is provided at the end of the valve tube (41), and the concave ring (43) moves outside the discharge port (331) to enable the valve plate (4) to slide off the vertical tube (31).

6. A portable fire water pump according to claim 5, characterized in that: The vertical pipe (31) is provided with symmetrically arranged support plates (311), and the valve plate (4) is provided with a tension spring connected to the support plates (311).

7. A portable fire water pump according to claim 6, characterized in that: The support plate (311) cooperates with the floating plate (53) in the active state.

8. A portable fire water pump according to claim 6, characterized in that: The valve plate (4) is driven into the transverse pipe (32), so that the water stored in the drainage tank (3) at the pipe bottom (33) is discharged into the centrifugal pump (21), and the diverted water is connected to the matching opening (42).

9. A portable fire water pump according to claim 8, characterized in that: The valve plate (4) blocks the tank body (3) as the tension spring returns to its original position, and guides the gas to connect the flow channel (522) and the transverse pipe (32).

10. A portable fire water pump according to claim 9, characterized in that: The flow channel (522) divides the gas and is connected to the opening (42), and is used to connect to the valve tube (41).

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