CN111765090A

CN111765090A - Multistage fire pump of high-efficient water delivery

Info

Publication number: CN111765090A
Application number: CN202010591162.2A
Authority: CN
Inventors: 袁洪金; 王明
Original assignee: Shanghai Somai Heavy Industry Machinery Co ltd
Current assignee: Shanghai Somai Heavy Industry Machinery Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2020-10-13

Abstract

The invention belongs to the technical field of fire fighting equipment, and particularly relates to a multistage fire pump for high-efficiency water delivery, which comprises a support plate, a motor and a connecting ring; the upper side of the supporting plate positioned at the bottom is fixedly connected with a base; the upper surface of the supporting plate positioned at the top is fixedly connected with a motor; one side of the base, which is close to the motor, is fixedly connected with a connecting ring; the connecting rings are matched with the base and the top supporting plate to be mutually combined to form a pressurizing cavity; a first cavity is formed in the base; the motor output shaft penetrates through the support plate, the shell and the base and extends into the first cavity; one end of the output shaft of the motor, which is positioned in the first cavity, is fixedly connected with a first cam; the first cavity is positioned on one side of the first cam and is rotationally connected with a second cam; the motor rotates to drive the first cam and the second cam to rotate at a constant speed, so that a water inlet pipe orifice forms negative pressure, an external water source is sucked by the negative pressure to enter the water inlet pipe, and the external water source is introduced into the multistage fire pump to be quickly sprayed out through pressurization.

Description

Multistage fire pump of high-efficient water delivery

Technical Field

The invention belongs to the technical field of fire fighting equipment, and particularly relates to a multistage fire pump for high-efficiency water delivery.

Background

As the name suggests, the fire pump used in fire fighting is an imported foreign product, is divided into different types according to different classification modes, has the characteristics of full sealing, no leakage and corrosion resistance, is widely used for pumping various liquids in departments of environmental protection, water treatment, fire fighting and the like, and is an ideal pump and fire fighting system for establishing a non-leakage and non-pollution civilized workshop and a civilized factory. The multistage fire pump adopts special hydraulic design and structural design, make it have flow pressure stepping and more be fit for building fire control water supply system than ordinary centrifugal clear water pump and choose for use, flow-pressure characteristic curve is flat and has not the hump, but current fire pump does not often possess the self priming efficiency when working, need fill water in the fire pump casing earlier, then just can make fire pump during operation possess the water absorption function, this just leads to in some proruption conflagration scene, fire pump possesses certain delay when using, thereby produce certain negative effects to fire fighting work, and simultaneously, current fire pump design is comparatively complicated, thereby it is comparatively troublesome when removing, can not nimble be applied to in fire fighting work.

A novel fire pump that china's patent was issued, patent number: 2019102638908, including the pump body be equipped with muffler and water diversion device on the pump body, its characterized in that: a connecting mechanism is arranged between the pump body and the water diversion device; the handheld self-suction foam gun is arranged on the pump body, the silencer is provided with the pressure circulating cooling mechanism, the defects in the prior art can be overcome, the temperature of the whole fire fighting pump is reduced by using pressure water for cooling the silencer, the stability of the whole fire fighting pump is improved, and the fire fighting pump is prevented from being broken down due to overhigh temperature.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides the multistage fire pump for high-efficiency water delivery, and solves the problems that the multistage fire pump in the prior art is complex in design structure and not beneficial to flexible use, and the existing multistage fire pump is complex in water diversion link and not fast enough in efficiency.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a multistage fire pump for high-efficiency water delivery, which comprises a support plate, a motor and a connecting ring; the number of the support plates is two, and the two support plates are designed in parallel in the vertical direction; the opposite surfaces of the two supporting plates are fixedly connected with supporting columns which are uniformly distributed; the support columns and the support plates form a three-dimensional structure; the upper side of the supporting plate positioned at the bottom is fixedly connected with a base; the upper surface of the supporting plate positioned at the top is fixedly connected with a motor; one side of the base, which is close to the motor, is fixedly connected with connecting rings which are uniformly distributed; the connecting rings are matched with the base and the top supporting plate to be mutually combined to form a pressurizing cavity; a first fixing ring and a second fixing ring are fixedly connected to the combination positions of two adjacent connecting rings respectively; the first fixing ring and the second fixing ring are fixed through fastening bolts; a first cavity is formed in the base; the motor output shaft penetrates through the support plate and the base and extends into the first cavity; one end of the output shaft of the motor, which is positioned in the first cavity, is fixedly connected with a first cam; the first cavity is positioned on one side of the first cam and is rotationally connected with a second cam; the first cam is tightly combined with the second cam; one side of the base is fixedly connected with a water inlet pipe; the water inlet pipe extends into the first cavity; the end, far away from the first cavity, of the water inlet pipe is in a threaded design; the base is positioned at one side of the first cavity, which is far away from the water inlet pipe, and is provided with a first through groove; the first through groove is designed in an L shape; the first through groove conducts the first cavity and the pressurizing cavity; the rotating shaft of the motor is positioned in the supercharging cavity and is internally sleeved with uniformly distributed supercharging impellers; a water outlet pipe is fixedly connected with one side of the connecting ring close to the top; the water outlet pipe is in a threaded design at one side far away from the connecting ring; the first cam and the second cam are tightly combined in an initial state, so that the water inlet pipe and the first through groove are completely isolated;

in the prior art, a multistage fire pump mostly adopts a centrifugal pump structural design, the impeller is effectively utilized to endow strong centrifugal force to water flow when rotating, the water flow has stronger impact strength after being effectively supported by the fire pump, so that the lift of a water column is effectively improved, the impact range of the water column is wider when the fire pump carries out fire extinguishing operation, but the centrifugal pump is required to fill water into a shell when in use, the inside of the shell can be vacuumized through the rotation of the impeller, and the self-water-sucking effect is generated, meanwhile, in the water spraying operation, the water flow is often interrupted because the internal vacuum degree is impacted, the use is not only troublesome, but also certain negative effects are caused to the fire fighting operation, in the work, the external water pipe is in threaded connection with the water inlet pipe, the fire pump is started, the motor rotates, and the first cam is driven to rotate, the first cam rotates to drive the second cam to rotate, the first cam and the second cam are tightly combined with the side wall of the first cavity when rotating, the air in the water inlet pipe is continuously guided into the first through groove by the sunken parts of the first cam and the second cam, so that negative pressure is formed at the water inlet pipe, the water inlet pipe upwards guides water flow into the first cavity along with the gradual increase of the negative pressure, the water flow is guided into the first through groove along with the rotation of the first cam and the second cam, the water amount in the first through groove is gradually increased and enters the pressurizing cavity, a plurality of pressurizing impellers are sleeved in the pressurizing cavity by the rotating shaft of the motor, the pressurizing impellers rotate, the centrifugal force given by the high-speed rotation of the plurality of pressurizing impellers in the pressurizing cavity is quickly sprayed out on a fire source through the water outlet pipe, so that the fire pump can quickly and automatically absorb water after being started and is sprayed on the fire source at a high speed after being pressurized and held, make fire pump's use simpler on the one hand, dry to change simultaneously and set for from inhaling the formula and set for effectively making fire pump at the during operation as long as the water source sufficient alright in order continuously carrying out work, avoid the midway cutoff, lead to fire control fire fighting operation to receive the influence.

Preferably, a first chute is formed in the first through groove; a piston is connected in the first sliding chute in a sliding manner; the piston is in a cross-shaped design; one side of the first sliding chute, which is far away from the first cavity, is elastically connected with the piston through a spring; a second through groove is formed in the piston; the second through groove penetrates through the piston; one side of the piston, which is far away from the first cavity, is hinged with a sealing cover; the sealing cover is in a circular design, and the diameter of the sealing cover is larger than that of the second through groove;

because the first cam and the second cam have certain clearance for air extraction during dry rotation, the self-priming operation vacuumizing progress is not fast enough, the work preparation time has delay, during work, the first cam and the second cam rotate at a constant speed along with an output shaft of a motor in the first cavity, so that air at a water inlet pipe is gradually transferred into the first through groove, a certain negative pressure is formed at the water inlet pipe, the first cam and the second cam regularly extrude a piston in the first chute during rotation, the piston is reciprocated in the first through groove and the first cavity by matching with a spring arranged at one side of the first chute, which is far away from the first cavity, and when the piston moves towards the first cavity, the air transferred to the first through groove through the first cam and the second cam jacks up a sealing cover along the second through groove arranged on the piston, so that the air enters the pressurizing cavity through the first through groove, when the piston receives first cam and the extrusion of second cam to keeping away from first cavity one side and removing, sealed lid receives the effect of gravity and pressure and piston combined closely, thereby make the second lead to the groove seal, the design of piston and sealed lid, displacement when utilizing first cam and second cam to rotate changes, thereby make the piston produce regular motion, and then make the gas transfer of first logical notch in the pressure boost chamber, thereby accelerate the formation speed of first cavity and water inlet pipe mouth vacuum effectively, make fire pump work back self priming operation time shorten effectively, after the self priming operation is accomplished simultaneously, the piston can also play the effect of pressure boost to the rivers, thereby accelerate the velocity of flow of rivers in first logical inslot effectively, make fire pump possess better to the effect of holding to the lift of rivers.

Preferably, one side of the first chute, which is close to the first cavity, is fixedly connected with a squeezing bag; a second sliding groove is formed in the piston; a sliding block is connected in the second sliding chute in a sliding manner; one side of the sliding block, which is close to the first cavity, is fixedly connected with an expansion bag; the expansion bag and the extrusion bag are communicated through a catheter; one side of the sliding block, which is far away from the first cavity, is fixedly connected with a connecting belt; the other end of the connecting belt is connected to one side of the sealing cover close to the piston; the joint point of the connecting belt and the sealing cover and the hinge point of the sealing cover and the piston are symmetrically designed;

when the air compressor works, when the piston moves towards the first cavity relative to the first through groove, the piston moves to generate an extrusion effect on the extrusion bag, so that the extrusion bag deforms, gas in the extrusion bag enters the expansion bag through the guide pipe, the gas in the expansion bag increases, so that the sliding block slides towards one end far away from the first cavity relative to the second sliding groove, so that the tensile force applied to the connecting belt is reduced, the sealing cover can freely rotate along with the movement of the piston, so that the sealed second through groove is opened, meanwhile, when the piston slides towards one side far away from the first cavity relative to the first through groove, the extrusion force applied to the extrusion bag disappears, the extrusion bag recovers deformation, the gas in the expansion bag flows back, so that the sliding block slides towards one side far away from the sealing cover, the connecting belt is subjected to a certain degree of tensile force, so that the sealing cover generates a certain tensile force, and the sealing cover is combined, therefore, the sealing effect on the second through groove is effectively enhanced, and the effect that the piston and the sealing cover assist the first cam and the second cam to form vacuum degree is enhanced.

Preferably, the pressure boosting cavity is fixedly connected with guide rings which are uniformly distributed; the inclined plane of one side of the guide ring, which is far away from the motor, is designed; the guide ring is made of elastic rubber material; the during operation, rivers are through the extrusion of first cam and second cam and piston, the propelling movement gets into the pressure boost intracavity, rotation along with the motor, the motor drives pressure boost impeller and rotates, thereby make rivers receive centrifugal force and flow to the go-between, at the flow in-process, rivers flow through the water conservancy diversion ring inclined plane, and upwards strike gradually along with the inclined plane, thereby guide rivers and upwards strike effectively, through the guide impact of multistage pressure boost impeller and water conservancy diversion ring, rivers possess powerful kinetic energy, thereby spray to the external world through the outlet pipe, make the rivers more smooth and easy at the flow of pressure boost intracavity effectively, avoid because of the centrifugal force that a large amount of consumptions pressure boost impeller produced such as striking, rivers flow direction is more mellow and more simultaneously, can also reduce the impact force to the go-between, reduce the vibration that the fire pump produced at the during operation, it is more steady.

Preferably, a sealing ring is arranged between the first fixing ring and the second fixing ring; the sealing ring is made of a rubber material; a buffer groove is formed in one side, away from the second fixing ring, of the first fixing ring; a buffer spring is fixedly connected in the buffer groove; the second fixing ring is provided with a thread groove; the thread groove penetrates through the sealing ring and is arranged with the first fixing ring conduction buffer groove; the fastening bolt penetrates through the buffer spring and is in threaded connection with the sealing ring and the thread groove; the during operation, the motor rotates, thereby make the rivers in the pressure boost intracavity rotate along with the pressure boost impeller, the rivers impact of flow is on the go-between, make the fire pump wholly produce the vibration, the go-between vibration, thereby make the sealed effect of junction receive the influence, when the go-between produces the vibration displacement, make the solid fixed ring of first fixed ring and the solid fixed ring of second that links firmly on the go-between vibrate with the frequency, thereby fastening bolt produces the displacement along with first fixed ring and the solid fixed ring of second and produces pressure to buffer spring, buffer spring takes place deformation, form the elastic force, thereby slow down first fixed ring and the first fixed ring's displacement degree effectively, thereby slow down the frequency of vibration effectively, make the fire pump at the during operation more steady.

Preferably, the first cam and the second cam surface are both coated with a rubber layer; when the water inlet pipe is in work, the water inlet pipe orifice is gradually made to form negative pressure along with the rotation of the first cam and the second cam, the rubber coating layer of the first cam and the second cam can effectively convert the contact between the first cam and the second cam and the first cavity into soft contact, thereby the contact area is combined more tightly, the sealing degree of the isolation effect formed between the water inlet pipe and the first through groove by the first cam and the second cam is more obvious, meanwhile, the soft contact can effectively generate certain friction force among the first cavity, the first cam and the second cam, therefore, the adsorptive impurities attached in the first cavity in the water source during water pumping are removed, the self-cleaning capability in the first cavity is effectively enhanced, and the first cam, the second cam and the side wall of the first cavity are prevented from being corroded by the impurities, so that the air tightness of the first cavity is influenced.

The invention has the following beneficial effects:

1. according to the multistage fire pump for high-efficiency water delivery, the first cavity, the first cam and the second cam are arranged, the first cam and the second cam are driven to rotate in the first cavity at a constant speed by the rotation of the motor, air at the water inlet pipe orifice is gradually guided into the first through groove when the first cam and the second cam rotate, so that the water inlet pipe orifice forms a certain degree of negative pressure, and the piston and the sealing cover are designed to slide relatively by the aid of the piston and the sealing cover, so that the forming speed of the vacuum degree of the water inlet pipe orifice is effectively accelerated, the multistage fire pump has a strong water self-sucking effect, and the fire pump is simpler and faster to operate.

2. According to the multistage fire pump for high-efficiency water delivery, the supercharging impeller, the flow guide ring and the piston are arranged, so that water flow in the first through groove is extruded into the supercharging cavity along with the movement of the piston, the supercharging impeller is driven by the motor to rotate along with the motor to generate a guiding effect on the water flow, the water flow rotates, centrifugal force is achieved, the water flow is quickly impacted upwards along with the guiding effect of the flow guide pipe, and the multistage fire pump has high stability through the design of the first fixing ring and the second fixing ring, so that the amplification effect of the multistage fire pump on water flow lift is effectively improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a partial cross-sectional view taken at A-A in FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

FIG. 5 is an enlarged view of a portion of FIG. 2 at C;

in the figure: the device comprises a support plate 1, a motor 2, a connecting ring 3, a first fixing ring 31, a second fixing ring 32, a fastening bolt 33, a sealing ring 34, a support column 11, a base 4, a first cavity 41, a first cam 42, a second cam 43, a water inlet pipe 44, a first through groove 45, a rubber layer 46, a pressurizing cavity 5, a pressurizing impeller 51, a water outlet pipe 52, a flow guide ring 53, a first sliding groove 6, a piston 61, a second through groove 62, a sealing cover 63, an extrusion bag 64, a second sliding groove 65, a sliding block 66, an expansion bag 67, a connecting belt 68, a buffering groove 7, a buffering spring 71 and a thread groove 72.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 5, the multistage fire pump for high-efficiency water delivery according to the present invention includes a support plate 1, a motor 2, and a connection ring 3; the number of the support plates 1 is two, and the two support plates 1 are designed in parallel in the vertical direction; the opposite surfaces of the two supporting plates 1 are fixedly connected with supporting columns 11 which are uniformly distributed; the support column 11 and the support plate 1 form a three-dimensional structure; the upper side of the supporting plate 1 positioned at the bottom is fixedly connected with a base 4; the upper surface of the supporting plate 1 positioned at the top is fixedly connected with a motor 2; one side of the base 4 close to the motor 2 is fixedly connected with evenly distributed connecting rings 3; a plurality of connecting rings 3 are combined with the base 4 and the top support plate 1 to form a pressurizing cavity 5; a first fixing ring 31 and a second fixing ring 32 are fixedly connected to the combination of two adjacent connecting rings 3 respectively; the first fixing ring 31 and the second fixing ring 32 are fixed by a fastening bolt 33; a first cavity 41 is formed in the base 4; the output shaft of the motor 2 penetrates through the support plate 1 and the base 4 and extends into the first cavity 41; one end of the output shaft of the motor 2, which is positioned in the first cavity 41, is fixedly connected with a first cam 42; a second cam 43 is rotatably connected to the first cavity 41 at one side of the first cam 42; the first cam 42 is tightly combined with the second cam 43; a water inlet pipe 44 is fixedly connected to one side of the base 4; the water inlet pipe 44 extends into the first cavity 41; the end of the water inlet pipe 44 far away from the first cavity 41 is in a threaded design; the base 4 is provided with a first through groove 45 at one side of the first cavity 41 away from the water inlet pipe 44; the first through groove 45 is designed in an L shape; the first through groove 45 conducts the first cavity 41 and the booster cavity 5; the rotating shaft of the motor 2 is positioned in the supercharging cavity 5 and is internally sleeved with uniformly distributed supercharging impellers 51; a water outlet pipe 52 is fixedly connected to one side of the connecting ring 3 close to the top; the water outlet pipe 52 is in a threaded design at one side far away from the connecting ring 3; in the initial state, the first cam 42 and the second cam 43 are tightly combined, so that the water inlet pipe 44 and the first through groove 45 are completely isolated;

in the prior art, the multistage fire pump mostly adopts the structural design of a centrifugal pump, the impeller is effectively utilized to endow strong centrifugal force to water flow when rotating, the water flow effectively has stronger impact strength after being clamped by the fire pump, so that the lift of a water column is effectively improved, the water column impact range of the fire pump is wider when fire extinguishing operation is carried out, but the centrifugal pump needs to fill water into the shell when in use, the inside of the shell can be vacuumized through the rotation of the impeller, the self-water-sucking effect is generated, meanwhile, in the water spraying operation, the water flow is often interrupted because the internal vacuum degree is impacted, the use is not only troublesome, but also certain negative effects are caused to the fire fighting operation, in the work process, the external water pipe is in threaded connection with the water inlet pipe 44, the fire pump is started, the motor 2 rotates, so as to drive the first cam 42 to rotate, the first cam 42 rotates to drive the second cam 43 to rotate, because the first cam 42 and the second cam 43 are tightly combined with the side wall of the first cavity 41 during rotation, the air in the water inlet pipe 44 is continuously led into the first through groove 45 by the concave parts of the first cam 42 and the second cam 43, so that negative pressure is formed at the opening of the water inlet pipe 44, along with the gradual increase of the negative pressure, the opening of the water inlet pipe 44 leads the water flow upwards into the first cavity 41, along with the rotation of the first cam 42 and the second cam 43, the water flow is led into the first through groove 45, the water quantity in the first through groove 45 is gradually increased and enters the booster cavity 5, because the rotating shaft of the motor 2 is arranged in the booster cavity 5 and is internally connected with a plurality of booster impellers 51, the booster impellers 2 rotates, so that the booster impellers 51 rotate, the water flow in the booster cavity 5 is rapidly sprayed outwards through the water outlet pipe 52 by the centrifugal force given by the high-speed rotation of the plurality of booster impellers 51, thereby make the automatic that can be quick after the fire pump starts absorb water and through the pressure boost with hold the back high-speed injection on the fire source, make the use of fire pump simpler on the one hand, dry to change simultaneously and set for from inhaling the formula and make the fire pump effectively as long as the water source sufficient alright in order to continuously carry out work at the during operation, avoid the midway cutoff, lead to fire control fire fighting operation to receive the influence.

As an embodiment of the present invention, a first sliding groove 6 is formed in the first through groove 45; a piston 61 is connected in the first sliding chute 6 in a sliding manner; the piston 61 is of a cross-shaped design; one side of the first sliding chute 6, which is far away from the first cavity 41, is elastically connected with the piston 61 through a spring; a second through groove 62 is formed in the piston 61; the second through groove 62 is designed to penetrate through the piston 61; one side of the piston 61, which is far away from the first cavity 41, is hinged with a sealing cover 63; the sealing cover 63 is circularly designed, and the diameter of the sealing cover 63 is larger than that of the second through groove 62;

because the first cam 42 and the second cam 43 have a certain gap for air extraction during dry rotation, the vacuum-pumping progress of self-priming operation is not fast enough, and the work preparation time is delayed, during work, the first cam 42 and the second cam 43 rotate at a constant speed along with the output shaft of the motor 2 in the first cavity 41, so that the air at the port of the water inlet pipe 44 is gradually transferred into the first through groove 45, the port of the water inlet pipe 44 forms a certain negative pressure, the first cam 42 and the second cam 43 regularly extrude the piston 61 in the first chute 6 during rotation, the piston 61 reciprocates in the first through groove 45 and the first cavity 41 by matching with the spring arranged at one side of the first chute 6 far away from the first cavity 41, when the piston 61 moves towards the first cavity 41, the air transferred to the port of the first through groove 45 through the first cam 42 and the second cam 43 jacks up the sealing cover 63 along the second through groove 62 arranged on the piston 61, thereby entering the pressurizing chamber 5 through the first through groove 45, when the piston 61 is pressed by the first cam 42 and the second cam 43 to move away from the first cavity 41, the seal cover 63 is tightly combined with the piston 61 by the gravity and the pressure, so that the second through groove 62 is sealed, and the piston 61 and the sealing cover 63 are designed to generate regular motion of the piston 61 by using the displacement change when the first cam 42 and the second cam 43 rotate, further, the gas at the opening of the first through groove 45 is transferred into the pressurizing cavity 5, thereby effectively accelerating the forming speed of the vacuum degree of the first cavity 41 and the opening of the water inlet pipe 44, effectively shortening the self-water-sucking operation time after the fire pump works, meanwhile, after the self-priming operation is finished, the piston 61 can also play a role in pressurizing water flow, thereby quickening the speed that rivers flow in first logical groove 45 effectively, making the fire pump possess better to the lift of rivers and hold the effect.

As an embodiment of the present invention, a side of the first chute 6 close to the first cavity 41 is fixedly connected with a squeezing bag 64; a second sliding groove 65 is formed in the piston 61; a sliding block 66 is connected in the second sliding groove 65 in a sliding manner; one side of the sliding block 66 close to the first cavity 41 is fixedly connected with an expansion bag 67; the expansion balloon 67 and the extrusion balloon 64 are designed to be communicated through a catheter; one side of the sliding block 66, which is far away from the first cavity 41, is fixedly connected with a connecting belt 68; the other end of the connecting belt 68 is connected to one side of the sealing cover 63 close to the piston 61; the joint point of the connecting belt 68 and the sealing cover 63 is symmetrically designed with the hinge point of the sealing cover 63 and the piston 61;

during operation, when the piston 61 moves towards the first cavity 41 relative to the first through groove 45, the piston 61 moves to generate an extrusion effect on the extrusion bag 64, so that the extrusion bag 64 is deformed, gas in the extrusion bag 64 enters the expansion bag 67 through a conduit, the gas in the expansion bag 67 is increased, the sliding block 66 slides towards one end far away from the first cavity 41 relative to the second sliding groove 65, so that the tensile force applied to the connecting belt 68 is reduced, the sealing cover 63 can freely rotate along with the movement of the piston 61, so that the sealed second through groove 62 is opened, meanwhile, when the piston 61 slides towards one side far away from the first cavity 41 relative to the first through groove 45, the extrusion force applied to the extrusion bag 64 disappears, the deformation of the extrusion bag 64 is recovered, the gas in the expansion bag 67 flows back, so that the sliding block 66 slides towards one side far away from the sealing cover 63, so that the connecting belt 68 is subjected to a certain degree of tensile force, thereby generating a certain tensile force on, the sealing cover 63 and the piston 61 are combined more tightly, so that the sealing effect on the second through groove 62 is effectively enhanced, and the effect of the piston 61 and the sealing cover 63 assisting the first cam 42 and the second cam 43 in forming the vacuum degree is enhanced.

As an embodiment of the present invention, the pressurizing cavity 5 is fixedly connected with uniformly distributed flow guide rings 53; the inclined surface design of the side of the guide ring 53 far away from the motor 2; the guide ring 53 is made of elastic rubber material; when the fire pump works, water flows through the first cam 42, the second cam 43 and the piston 61 and is extruded and pushed into the pressurizing cavity 5, the motor 2 drives the pressurizing impeller 51 to rotate along with the rotation of the motor 2, so that the water flows to the connecting ring 3 under the action of centrifugal force, in the flowing process, the water flows through the inclined surface of the guide ring 53 and gradually impacts upwards along with the inclined surface, so that the water is effectively guided to impact upwards, the water has strong kinetic energy through the guiding impact action of the multistage pressurizing impeller 51 and the guide ring 53, and is sprayed outwards through the water outlet pipe 52, so that the water flows in the pressurizing cavity 5 more smoothly, the centrifugal force generated by the pressurizing impeller 51 is greatly consumed due to impact and the like, meanwhile, the water flow direction is more smooth, the impact force on the connecting ring 3 can be reduced, and the vibration generated by the fire pump during working is reduced, the fire pump is more stable in working.

As an embodiment of the present invention, a seal ring 34 is installed between the first fixing ring 31 and the second fixing ring 32; the sealing ring 34 is made of elastic rubber material; a buffer groove 7 is formed in one side, away from the second fixing ring 32, of the first fixing ring 31; a buffer spring 71 is fixedly connected in the buffer groove 7; the second fixing ring 32 is provided with a thread groove 72; the thread groove 72 is arranged through the sealing ring 34 and the first fixing ring 31 to communicate with the buffer groove 7; the fastening bolt 33 is in threaded connection with the sealing ring 34 and the threaded groove 72 through the buffer spring 71; in operation, motor 2 rotates, thereby make the rivers in the booster cavity 5 rotate along with booster impeller 51, the rivers impact of flow is on go-between 3, make the fire pump wholly produce the vibration, go-between 3 vibrates, thereby make the sealed effect of junction receive the influence, when go-between 3 produces vibration displacement, make the solid fixed ring of first 31 and the solid fixed ring of second 32 on go-between 3 vibrate with the frequency, thereby fastening bolt 33 produces the displacement along with the solid fixed ring of first 31 and the second 32 produces the displacement and produces pressure to buffer spring 71, buffer spring 71 takes place deformation, form the elastic force, thereby slow down the displacement degree of first fixed ring 31 and the solid fixed ring of first 31 effectively, thereby slow down the frequency of vibration effectively, make the fire pump at the during operation more steady.

As an embodiment of the present invention, the surfaces of the first cam 42 and the second cam 43 are both covered with a rubber layer 46; during operation, with the rotation of the first cam 42 and the second cam 43, the opening of the water inlet pipe 44 is gradually formed with negative pressure, the rubber layer 46 coated on the surface of the first cam 42 and the second cam 43 can effectively convert the contact between the first cam 42 and the second cam 43 and the first cavity 41 into soft contact, so that the contact area is combined more tightly, the sealing degree of the isolation effect formed between the water inlet pipe 44 and the first through groove 45 by the first cam 42 and the second cam 43 is more obvious, meanwhile, the soft contact can effectively generate a certain friction force among the first cavity 41, the first cam 42 and the second cam 43, thereby removing the adsorptive impurities adhered in the first cavity 41 in the water source during pumping operation, effectively enhancing the self-cleaning capability in the first cavity 41, avoiding the impurities from corroding the side walls of the first cam 42, the second cam 43 and the first cavity 41, thereby affecting the gas-tight properties of the first cavity 41.

The specific working process is as follows:

when the fire pump works, the external water pipe is in threaded connection with the water inlet pipe 44, the fire pump is started, the motor 2 rotates to drive the first cam 42 to rotate, the first cam 42 rotates to drive the second cam 43 to rotate, the first cam 42 and the second cam 43 are tightly combined with the side wall of the first cavity 41 when rotating, air in the water inlet pipe 44 is continuously guided into the first through groove 45 by the sunken parts of the first cam 42 and the second cam 43, the piston 61 in the first chute 6 is regularly extruded when the first cam 42 and the second cam 43 rotate, the piston 61 is in reciprocating motion in the first through groove 45 and the first cavity 41 by matching with a spring arranged on one side of the first chute 6, which is far away from the first cavity 41, the air transferred to the opening of the first through groove 45 through the first cam 42 and the second cam 43 jacks up the sealing cover 63 along the second through groove 62 arranged on the piston 61 when the piston 61 moves towards the direction of the first cavity 41, thereby entering the pressurizing chamber 5 through the first through groove 45, when the piston 61 is pressed by the first cam 42 and the second cam 43 to move away from the first cavity 41, the seal cover 63 is tightly combined with the piston 61 by the gravity and the pressure, thereby sealing the second through groove 62, increasing the rate of negative pressure formation, and as the negative pressure gradually increases, the mouth of the water inlet pipe 44 directs the water flow upward into the first cavity 41, and as the first cam 42 and the second cam 43 rotate, the water flow is conducted into the first through groove 45, the amount of water in the first through groove 45 gradually increases and enters the pressurizing chamber 5, since the plurality of booster impellers 51 are fitted inside the booster cavity 5 with the rotating shaft of the motor 2, the motor 2 rotates, thereby rotating the booster impeller 51, and the water flow is ejected outward to the fire source through the water outlet pipe 52 by the centrifugal force given by the high-speed rotation of the plurality of booster impellers 51 in the booster chamber 5.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a multistage fire pump of high-efficient water delivery which characterized in that: comprises a support plate (1), a motor (2) and a connecting ring (3); the number of the support plates (1) is two, and the two support plates (1) are designed in parallel in the vertical direction; supporting columns (11) which are uniformly distributed are fixedly connected to the opposite surfaces of the two supporting plates (1); the support columns (11) and the support plate (1) form a three-dimensional structure; the upper side of the supporting plate (1) positioned at the bottom is fixedly connected with a base (4); the upper surface of the supporting plate (1) positioned at the top is fixedly connected with a motor (2); one side of the base (4) close to the motor (2) is fixedly connected with evenly distributed connecting rings (3); the connecting rings (3) are matched with the base (4) and combined with the top supporting plate (1) to form a pressurizing cavity (5); a first fixing ring (31) and a second fixing ring (32) are fixedly connected to the combination of two adjacent connecting rings (3) respectively; the first fixing ring (31) and the second fixing ring (32) are fixed through a fastening bolt (33); a first cavity (41) is formed in the base (4); the output shaft of the motor (2) penetrates through the support plate (1) and the base (4) and extends into the first cavity (41); one end of the output shaft of the motor (2) positioned in the first cavity (41) is fixedly connected with a first cam (42); the first cavity (41) is positioned on one side of the first cam (42) and is rotationally connected with a second cam (43); the first cam (42) is tightly combined with the second cam (43); a water inlet pipe (44) is fixedly connected to one side of the base (4); the water inlet pipe (44) extends into the first cavity (41); the end, far away from the first cavity (41), of the water inlet pipe (44) is in a threaded design; a first through groove (45) is formed in one side, away from the water inlet pipe (44), of the first cavity (41) of the base (4); the first through groove (45) is designed in an L shape; the first through groove (45) conducts the first cavity (41) and the pressurizing cavity (5); the rotating shaft of the motor (2) is positioned in the supercharging cavity (5) and is internally sleeved with uniformly distributed supercharging impellers (51); a water outlet pipe (52) is fixedly connected with one side of the connecting ring (3) close to the top; the water outlet pipe (52) is in a threaded design at one side far away from the connecting ring (3); in the initial state, the first cam (42) and the second cam (43) are tightly combined, so that the water inlet pipe (44) and the first through groove (45) are completely isolated.

2. A multistage fire pump for high efficiency water delivery as defined in claim 1, wherein: a first chute (6) is formed in the first through groove (45); a piston (61) is connected in the first sliding chute (6) in a sliding manner; the piston (61) is of a cross-shaped design; one side of the first sliding chute (6), which is far away from the first cavity (41), is elastically connected with the piston (61) through a spring; a second through groove (62) is formed in the piston (61); the second through groove (62) is designed to penetrate through the piston (61); one side of the piston (61) far away from the first cavity (41) is hinged with a sealing cover (63); the sealing cover (63) is in a circular design, and the diameter of the sealing cover (63) is larger than that of the second through groove (62).

3. A multistage fire pump for high efficiency water delivery as defined in claim 1, wherein: one side of the first sliding chute (6) close to the first cavity (41) is fixedly connected with a squeezing bag (64); a second sliding groove (65) is formed in the piston (61); a sliding block (66) is connected in the second sliding groove (65) in a sliding manner; one side of the sliding block (66) close to the first cavity (41) is fixedly connected with an expansion bag (67); the expansion bag (67) and the extrusion bag (64) are designed to be communicated through a catheter; one side of the sliding block (66) far away from the first cavity (41) is fixedly connected with a connecting belt (68); the other end of the connecting belt (68) is connected to one side, close to the piston (61), of the sealing cover (63); the joint point of the connecting belt (68) and the sealing cover (63) is designed to be symmetrical with the hinge point of the sealing cover (63) and the piston (61).

4. A multistage fire pump for high efficiency water delivery as defined in claim 3, wherein: the pressurizing cavity (5) is fixedly connected with guide rings (53) which are uniformly distributed; the inclined surface of one side of the guide ring (53) far away from the motor (2) is designed; the flow guide ring (53) is made of elastic rubber material.

5. A multistage fire pump for high efficiency water delivery as defined in claim 1, wherein: a sealing ring (34) is arranged between the first fixing ring (31) and the second fixing ring (32); the sealing ring (34) is made of elastic rubber material; a buffer groove (7) is formed in one side, away from the second fixing ring (32), of the first fixing ring (31); a buffer spring (71) is fixedly connected in the buffer groove (7); a thread groove (72) is formed in the second fixing ring (32); the thread groove (72) penetrates through the sealing ring (34) and the first fixing ring (31) to be communicated with the buffer groove (7); the fastening bolt (33) penetrates through the buffer spring (71) and is in threaded connection with the sealing ring (34) and the threaded groove (72).

6. A multistage fire pump for high efficiency water delivery as defined in claim 1, wherein: the surfaces of the first cam (42) and the second cam (43) are coated with rubber layers (46).