CN109763984B - Fire pump for fire engine - Google Patents
Fire pump for fire engine Download PDFInfo
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- CN109763984B CN109763984B CN201910078287.2A CN201910078287A CN109763984B CN 109763984 B CN109763984 B CN 109763984B CN 201910078287 A CN201910078287 A CN 201910078287A CN 109763984 B CN109763984 B CN 109763984B
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Abstract
The invention belongs to the technical field of fire-fighting facilities, and particularly relates to a fire-fighting water pump for a fire engine; comprises a fire-fighting water pump body and a controller; the fire pump body is fixed in a water tank of the fire engine through a fixed sucker; the fire pump body is provided with a water inlet pipe and a water outlet pipe respectively; the water outlet pipe is communicated with a first pressure relief unit, and the water inlet pipe is communicated with a second pressure relief unit; the fire pump has the advantages of ingenious design and high pressure relief speed, and the pressure in the fire pump body can be quickly reduced by the matched use of the first pressure relief unit and the second pressure relief unit.
Description
Technical Field
The invention belongs to the technical field of fire fighting facilities, and particularly relates to a fire fighting water pump for a fire fighting truck.
Background
The fire pump is a special fire pump or a common clear water pump which reaches the national standard GB6245 fire pump performance requirements and test methods. Most of the fire-fighting water sources provide fire-fighting water, which needs a fire-fighting water pump to pressurize so as to meet the requirements on water pressure and water quantity during fire extinguishing.
When the fire-fighting water pump is used, a pump body is easy to damage, a sealing piece is often failed, and a pipeline of a water outlet is burst, so that precious fire fighting time is influenced or even delayed; the reason for this phenomenon is that the water inlet pipe and the water outlet pipe normally feed and discharge water when the fire pump normally works, but when a fireman adjusts the fire extinguishing position, the fire cavity or the fire monitor needs to be closed, or when an abnormality occurs in the fire fighting process, the water outlet pipe needs to be closed, when the water outlet pipe is suddenly closed, the working speed of the fire pump is not reduced, but the water flow suddenly becomes zero, the pressure of the whole fire pump is rapidly increased, and when the bearing limit strength is exceeded, the water inlet pipe or the water outlet pipe, even the fire pump body is damaged; for the phenomenon, the common treatment modes are that firstly, the frequent inspection is carried out and corresponding parts are replaced in time, and secondly, objects with excellent pressure resistance are selected, but the two modes are only negative precautionary measures which can not address the root cause of the disease; so that the technical solution is limited.
Disclosure of Invention
In order to make up the defects of the prior art and solve the problem that the fire fighting pump body, the water inlet pipe and the water outlet pipe are easy to damage because the water outlet pipe is suddenly closed when the fire fighting pump is used in the prior art; the invention provides a fire pump for a fire engine.
The technical scheme adopted by the invention for solving the technical problems is as follows: the fire pump for the fire engine comprises a fire pump body and a controller, wherein the fire pump body is provided with a water inlet and a water outlet; the controller is used for controlling the fire-fighting water pump to work; the fire pump body is fixed in a water tank of the fire engine through a fixed sucker; the fire pump body is provided with a water inlet pipe and a water outlet pipe respectively; the water outlet pipe is communicated with a first pressure relief unit, the first pressure relief unit is used for reducing water pressure in the fire pump body, the water inlet pipe and the water outlet pipe, and the first pressure relief unit comprises a first pressure relief pipe, a first sealing gasket, a first sealing head and an ejector rod; a pressure valve is arranged in the first pressure relief pipe, a first sealing gasket is completely attached to the side wall of the first pressure relief pipe, and the first sealing gasket seals the first pressure relief pipe when the first pressure relief unit does not work; the first sealing head is positioned below the first sealing pad, and the ejector rod is positioned below the first sealing head and fixedly connected with the first sealing head; one end of the ejector rod, which is far away from the first sealing head, is sleeved with a fixing ring, two sides of the fixing ring are fixedly connected with the side wall of the first pressure relief pipe, and holes are formed in the fixing ring; when the first sealing head moves downwards, the ejector rod slides in the fixing ring; a spring is arranged between the first sealing head and the ejector rod, and the spring is sleeved on the ejector rod; the part of the first sealing gasket, which is contacted with the side wall of the first pressure relief pipe, is internally provided with a cavity, the cavity is filled with gas, and the cavity is compressed when the first sealing gasket seals the first pressure relief pipe so that the gas in the cavity is discharged; the first pressure relief pipe consists of two bottleneck-shaped pressure relief pipes, a first lantern ring, a second lantern ring and an elastic ring, wherein the first lantern ring, the second lantern ring and the elastic ring are all positioned between the adjacent bottleneck-shaped pressure relief pipes; the water inlet pipe is communicated with a second pressure relief unit, and the second pressure relief unit is used for assisting the first pressure relief unit to eliminate water pressure in the fire pump body, the water inlet pipe and the water outlet pipe; according to the fire-fighting water pump, the first pressure relief unit is designed, so that the water pressure in the fire-fighting water pump body can be reduced when the water outlet pipe is suddenly closed, and the fire-fighting water pump body is prevented from being damaged due to the fact that the water pressure in the fire-fighting water pump body is too high, and therefore the fire-fighting rescue efficiency is influenced; through using bottleneck form pressure-relief pipe, a lantern ring, No. two lantern rings and elastic ring to constitute a pressure-relief pipe, can reduce rivers to the impact of a pressure-relief pipe, improve the life of a pressure-relief pipe, simultaneously through No. two pressure-relief units of design in inlet tube department, this internal water pressure of reduction fire pump that can be further prevents that the phenomenon of bursting appears in inlet tube and outlet pipe, has improved the life of fire pump body, inlet tube and outlet pipe.
Preferably, the second pressure relief unit comprises a second pressure relief pipe, a second sealing gasket, a second sealing head, a sliding rod, a fixing block and a cylinder; a pressure valve is arranged in the second pressure relief pipe; a fixing table is arranged below the air cylinder, the fixing table is fixedly connected with the side wall of the second pressure relief pipe, and a hole is formed in the fixing table; the bottom of the cylinder is fixedly connected with the fixed table, the input end of the cylinder is communicated with a cavity in a first sealing gasket on a first pressure relief pipe through an air pipe, the output end of the cylinder is fixedly connected with the fixed block, one end of the fixed block, far away from the cylinder, is fixedly connected with the sliding rod, one end of the sliding rod, far away from the fixed block, is sleeved with a second sealing head, one end of the second sealing head, far away from the sliding rod, is fixedly connected with a second sealing gasket, a spring is arranged between the second sealing head and the sliding rod, and the spring is sleeved; when the first sealing pad seals the first pressure relief pipe, gas discharged by cavity compression enters the cylinder to enable the output end of the cylinder to extend out, and when the output end of the cylinder extends out, the second sealing pad is attached to the second pressure relief pipe to seal the second pressure relief pipe; according to the invention, the second pressure relief unit is designed, and the second pressure relief unit can be matched with the first pressure relief unit to reduce the air pressure in the fire pump body when working, so that the pressure relief speed of the fire pump body is accelerated.
Preferably, a diversion cavity is formed in the first sealing head and the ejector rod in the first pressure relief pipe, the diversion cavity is symmetrically arranged by taking the vertical central line of the first pressure relief pipe as a reference, and the diversion cavity is used for reducing the impact of water flow on the first pressure relief pipe; according to the invention, the water flowing into the first pressure relief pipe can be subjected to flow division treatment by additionally arranging the flow dividing cavity, so that the impact force of the water is reduced, and the service life of the first pressure relief pipe is prolonged.
Preferably, the second sealing head is made of a magnetic material, the fixing block is an electromagnet, and the magnetism of the fixing block is the same as that of the second sealing head when the fixing block is electrified; the fixed block is fixedly connected with a first electric contact on one side of the fixed block, a second electric contact is fixedly connected on the side wall of the second pressure relief pipe, the first electric contact and the second electric contact are both electrically connected with the controller, and the fixed block is electrified when the first electric contact is contacted with the second electric contact; according to the invention, the first electric contact and the second electric contact are designed, and the first electric contact and the second electric contact are electrified when in contact, so that the fixed block has magnetism, the second sealing head is made of a magnetic material, and the magnetism of the second sealing head is the same as that of the fixed block, so that a repulsive force is formed between the second sealing head and the fixed block, the second sealing gasket can better seal the second pressure relief pipe when the second pressure relief unit does not work, and the fire pump body can be ensured not to have water flow entering the second pressure relief pipe when in normal work.
Preferably, a steel wire sleeve with a circular cross-section structure is sleeved on the part, located in the first sleeve ring and the second sleeve ring, of the elastic ring, and the steel wire sleeve is used for protecting the elastic ring; according to the invention, the steel wire sleeve is sleeved on the elastic ring between the first lantern ring and the second lantern ring, so that the elastic ring is not in direct contact with the first lantern ring and the second lantern ring which are in threaded connection, the abrasion of the elastic ring is reduced, and the service life of the elastic ring is prolonged.
Preferably, the cross section structure of the thread between the first lantern ring and the second lantern ring is semicircular, the semicircular thread is in threaded connection with the circular steel wire sleeve, so that the first lantern ring, the second lantern ring and the elastic ring are completely attached to each other, and meanwhile, the elastic ring can be fixed; according to the invention, the threads with the semicircular cross-section structures are designed, and the threads with the semicircular cross-section structures can be completely attached to the elastic ring with the circular cross-section structures, so that the first lantern ring, the second lantern ring and the elastic ring are well sealed, and the use reliability of the first pressure relief pipe is improved.
When the fire pump body normally works, the first sealing gasket is completely attached and compressed with the side wall of the first pressure relief pipe, when the first sealing gasket is compressed, gas in the cavity enters the cylinder through the gas pipe so that the output end of the cylinder extends out, the output end of the cylinder extends out so that the second sealing gasket is completely attached and compressed with the side wall of the second pressure relief pipe, the first electric contact is contacted with the second electric contact, the fixed block is electrified so that the fixed block is repelled by the second sealing head, the second sealing gasket can be attached and compressed with the side wall of the second pressure relief pipe, the second pressure relief pipe can be better sealed by the second sealing gasket, and the first pressure relief pipe and the second pressure relief pipe are both in a sealing state; when the water outlet pipe of the fire pump body is suddenly closed, the working speed of the fire pump body is not reduced, the water flow suddenly becomes zero, and water in the water inlet pipe continuously enters the fire pump body, so that the pressure in the fire pump body is suddenly increased; at the moment, water in the fire pump body can continuously enter the first pressure relief pipe and the second pressure relief pipe, pressure valves in the first pressure relief pipe and the second pressure relief pipe are opened, when the water flow enters the first pressure relief pipe, the water flow impacts the first sealing gasket to enable the first sealing gasket to move downwards, the first pressure relief pipe is dredged when the first sealing gasket moves downwards, the water flow flows out of two sides of the first sealing gasket, in order to prevent the first pressure relief pipe from being damaged due to the fact that the water flow is too large, a part of water can be shunted through the shunting cavity, the water is reduced, and the first pressure relief pipe is formed by the bottleneck-shaped pressure relief pipe, the first lantern ring, the second lantern ring and the elastic ring, so that the first pressure relief pipe is flexible, impact of the water on the first pressure relief pipe can be further reduced, and the service life of the first pressure relief pipe is prolonged; when the first sealing gasket moves downwards, the cavity recovers to the original state, the gas in the cylinder returns to the cavity again, the output end of the cylinder moves downwards at the moment, the first electric contact and the second electric contact are disconnected, the second sealing gasket moves downwards, the second pressure relief pipe is dredged, and the water entering the water inlet pipe is discharged through the second pressure relief pipe at the moment; the first pressure relief unit and the second pressure relief unit are matched for use, so that the water pressure in the fire pump body can be rapidly reduced, the fire pump body is not easily damaged due to overlarge water pressure, and the phenomenon of pipe explosion of the water inlet pipe and the water outlet pipe due to overlarge water pressure is avoided; and after the fire pump body release is accomplished, under the effect of spring, ejector pin rebound, sealed the lateral wall laminating of following new and a pressure relief pipe of filling up for a sealed cavity compression exhaust gas that fills up, the combustion gas passes through in the trachea gets into the cylinder again, make the output of cylinder stretch out again, an electrical contact and No. two electrical contact re-contact, the fixed block is from new circular telegram, the fixed block repeatees with No. two seal stations, No. two sealed fill up and No. two pressure relief pipe's lateral wall laminating again, at this moment a pressure relief pipe and No. two pressure relief pipe use from recovering to encapsulated situation again, make things convenient for next time release.
The invention has the following beneficial effects:
1. the invention relates to a fire pump for a fire engine; the continuity is strong, and the release is fast, uses through the cooperation of a release unit and No. two release units, can reduce this internal pressure of fire pump rapidly, also can reduce the pressure in inlet tube and the outlet pipe simultaneously, avoids when the outlet pipe is closed suddenly, and this internal pressure of fire pump increases suddenly and causes inlet tube and outlet pipe to damage or the fire pump body damages.
2. The fire pump for the fire engine is ingenious in design and novel in structure, the first hydraulic unit can drive the second pressure relief unit to work when working, the pressure relief rate of the fire pump is improved, the utilization rate of resources is improved, and the service life of the fire pump body can be prolonged when the first pressure relief unit and the second pressure relief unit work.
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 a pressure relief tube;
FIG. 3 is a cross-sectional view of a pressure relief tube number two;
FIG. 4 is an enlarged view of a portion of FIG. 2 at A;
FIG. 5 is an enlarged view of a portion of FIG. 2 at B;
FIG. 6 is an enlarged view of a portion of FIG. 3 at C;
in the figure: the fire pump comprises a fire pump body 1, a fixed sucker 2, a water inlet pipe 3, a water outlet pipe 4, a first pressure relief unit 5, a first pressure relief pipe 51, a bottleneck-shaped pressure relief pipe 511, a first lantern ring 512, a second lantern ring 513, an elastic ring 514, a first sealing gasket 52, a first sealing head 53, a top rod 54, a fixing ring 55, a cavity 56, a second pressure relief unit 6, a second pressure relief pipe 61, a second sealing gasket 62, a second sealing head 63, a sliding rod 64, a fixing block 65, a first electric contact 651, a second electric contact 652, a cylinder 66, a gas pipe 661, a fixing table 67, a shunt cavity 7 and a steel wire sleeve 8.
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 6, the fire pump for a fire engine according to the present invention includes a fire pump body 1 and a controller; the controller is used for controlling the fire-fighting water pump to work; the fire pump body 1 is fixed in a water tank of a fire engine through a fixed sucker 2; the fire-fighting water pump body 1 is respectively provided with a water inlet pipe 3 and a water outlet pipe 4; the water outlet pipe 4 is communicated with a first pressure relief unit 5, the first pressure relief unit 5 is used for reducing water pressure in the fire pump body, the water inlet pipe 3 and the water outlet pipe 4, and the first pressure relief unit 5 comprises a first pressure relief pipe 51, a first sealing gasket 52, a first sealing head 53 and a push rod 54; a pressure valve is arranged in the first pressure relief pipe 51, a first sealing gasket 52 is completely attached to the side wall of the first pressure relief pipe 51, and the first sealing gasket 52 seals the first pressure relief pipe 51 when the first pressure relief unit 5 does not work; the first sealing head 53 is positioned below the first sealing pad 52, and the ejector rod 54 is positioned below the first sealing head 53 and fixedly connected with the first sealing head 53; one end of the ejector rod 54, which is far away from the first sealing head 53, is sleeved with a fixing ring 55, two sides of the fixing ring 55 are fixedly connected with the side wall of the first pressure relief pipe 51, and a hole is formed in the fixing ring 55; when the first sealing head 53 moves downwards, the mandril 54 slides in the fixing ring 55; a spring is arranged between the first sealing head 53 and the ejector rod 54, and the spring is sleeved on the ejector rod 54; a cavity 56 is formed in the contact part of the first sealing gasket 52 and the side wall of the first pressure relief pipe 51, the cavity 56 is filled with gas, and when the first sealing gasket 52 seals the first pressure relief pipe 51, the cavity 56 is compressed to discharge the gas in the cavity 56; the first pressure relief pipe 51 consists of two bottleneck-shaped pressure relief pipes 511, a first lantern ring 512, a second lantern ring 513 and an elastic ring 514, the first lantern ring 512, the second lantern ring 513 and the elastic ring 514 are located between the adjacent bottleneck-shaped pressure relief pipes 511, the first lantern ring 512 is fixedly connected with the bottleneck-shaped pressure relief pipes 511, the second lantern ring 513 is located on the outer side of the first lantern ring 512, the end part of the elastic ring 514 is located between the first lantern ring 512 and the second lantern ring 513, and the elastic ring 514 is screwed together by the first lantern ring 512 and the second lantern ring 513; the water inlet pipe 3 is communicated with a second pressure relief unit 6, and the second pressure relief unit 6 is used for assisting the first pressure relief unit 5 in eliminating water pressure in the fire pump body, the water inlet pipe 3 and the water outlet pipe 4; according to the invention, the first pressure relief unit 5 is designed, so that the water pressure in the fire pump body 1 can be reduced when the water outlet pipe 4 is suddenly closed, and the fire pump body 1 is prevented from being damaged due to the fact that the water pressure in the fire pump body 1 is too high, so that the fire rescue efficiency is influenced; through using bottleneck form pressure-relief pipe 511, a lantern ring 512, a pressure-relief pipe 51 that No. two lantern rings 513 and elastic ring 514 are constituteed, can reduce rivers to a pressure-relief pipe 51's impact, improve a pressure-relief pipe 51's life, simultaneously through No. two pressure-relief unit 6 of design in inlet tube 3 department, the water pressure in the reduction fire pump body 1 that can be further, prevent that the phenomenon of pipe explosion from appearing in inlet tube 3 and outlet pipe 4, fire pump body 1 has been improved, the life of inlet tube 3 and outlet pipe 4.
As a specific embodiment of the present invention, the second pressure relief unit 6 includes a second pressure relief pipe 61, a second gasket 62, a second sealing head 63, a sliding rod 64, a fixed block 65, and an air cylinder 66; a pressure valve is arranged in the second pressure relief pipe 61; a fixing table 67 is arranged below the air cylinder 66, the fixing table 67 is fixedly connected with the side wall of the second pressure relief pipe 61, and a hole is formed in the fixing table 67; the bottom of the cylinder 66 is fixedly connected with the fixed table 67, the input end of the cylinder 66 is communicated with the cavity 56 in the first sealing gasket 52 on the first pressure relief pipe 51 through an air pipe 661, the output end of the cylinder 66 is fixedly connected with the fixed block 65, one end of the fixed block 65 far away from the cylinder 66 is fixedly connected with the sliding rod 64, one end of the sliding rod 64 far away from the fixed block 65 is sleeved with the second sealing head 63, one end of the second sealing head 63 far away from the sliding rod 64 is fixedly connected with the second sealing gasket 62, a spring is arranged between the second sealing head 63 and the sliding rod 64, and the spring is sleeved on the sliding rod 64; when the first sealing gasket 52 seals the first pressure relief pipe 51, the gas compressed and exhausted by the cavity 56 enters the air cylinder 66, so that the output end of the air cylinder 66 extends out, and when the output end of the air cylinder 66 extends out, the second sealing gasket 62 is attached to the second pressure relief pipe 61 to seal the second pressure relief pipe 61; according to the invention, the second pressure relief unit 6 is designed, and the second pressure relief unit 6 can be matched with the first pressure relief unit 5 to reduce the air pressure in the fire pump body 1 when working, so that the pressure relief speed of the fire pump body 1 is increased.
As a specific embodiment of the present invention, a diversion cavity 7 is formed in the first sealing head 53 and the ejector rod 54 in the first pressure relief pipe 51, the diversion cavity 7 is symmetrically arranged with reference to a vertical center line of the first pressure relief pipe 51, and the diversion cavity 7 is used for reducing impact of water flow on the first pressure relief pipe 51; according to the invention, the water flowing into the first pressure relief pipe 51 can be subjected to flow division treatment by additionally arranging the flow dividing cavity 7, so that the impact force of the water is reduced, and the service life of the first pressure relief pipe 51 is prolonged.
As a specific embodiment of the present invention, the second sealing head 63 is made of a magnetic material, the fixing block 65 is an electromagnet, and the magnetism of the fixing block 65 when the fixing block is electrified is the same as that of the second sealing head 63; a first electric contact 651 is fixedly connected to one side of the fixing block 65, a second electric contact 652 is fixedly connected to the side wall of the second pressure relief pipe 61, the first electric contact 651 and the second electric contact 652 are electrically connected with the controller, and the fixing block 65 is electrified when the first electric contact 651 is contacted with the second electric contact 652; according to the invention, the first electric contact 651 and the second electric contact 652 are designed, the first electric contact 651 and the second electric contact 652 are electrified when in contact, so that the fixed block 65 has magnetism, the second sealing head 63 is made of a magnetic material, and the magnetism of the second sealing head 63 is the same as that of the fixed block 65, so that a repulsive force is formed between the second sealing head 63 and the fixed block 65, the second sealing gasket 62 can better seal the second pressure relief pipe 61 when the second pressure relief unit 6 does not work, and water flow can not enter the second pressure relief pipe 61 when the fire pump body 1 works normally.
As a specific embodiment of the present invention, a steel wire sleeve 8 with a circular cross-sectional structure is sleeved on a portion of the elastic ring 514 located in the first lantern ring 512 and the second lantern ring 513, and the steel wire sleeve 8 is used for protecting the elastic ring 514; according to the invention, the steel wire sleeve 8 is sleeved on the elastic ring 514 positioned between the first lantern ring 512 and the second lantern ring 513, so that the elastic ring 514 is not in direct contact with the first lantern ring 512 and the second lantern ring 513 which are in threaded connection, the abrasion of the elastic ring 514 is reduced, and the service life of the elastic ring 514 is prolonged.
As a specific embodiment of the present invention, the cross-sectional structure of the thread between the first lantern ring 512 and the second lantern ring 513 is a semi-circle, and the semi-circle thread is screwed with the circular steel wire sheath 8, so that the first lantern ring 512, the second lantern ring 513 and the elastic ring 514 are completely attached to each other, and the elastic ring 514 can be fixed; according to the invention, by designing the threads with the semicircular cross-section structures, the threads with the semicircular cross-section structures can be completely attached to the elastic ring 514 with the circular cross-section structures, so that the sealing among the first lantern ring 512, the second lantern ring 513 and the elastic ring 514 is good, and the use reliability of the first pressure relief pipe 51 is improved.
When the fire pump works normally, the first sealing gasket 52 is completely attached and compressed with the side wall of the first pressure relief pipe 51, when the first sealing gasket 52 is compressed, gas in the cavity 56 enters the cylinder 66 through the gas pipe 661 so that the output end of the cylinder 66 extends out, the output end of the cylinder 66 extends out so that the second sealing gasket 62 is completely attached and compressed with the side wall of the second pressure relief pipe 61, meanwhile, the first electric contact 651 is contacted with the second electric contact 652, the fixing block 65 is electrified so that the fixing block 65 is repelled from the second sealing head 63, the second sealing gasket 62 can be attached to the side wall of the second pressure relief pipe 61 compactly, the second sealing gasket 62 can be better sealed with the second pressure relief pipe 61, and the first pressure relief pipe 51 and the second pressure relief pipe 61 are both in a sealing state; when the water outlet pipe 4 of the fire pump body is suddenly closed, the working speed of the fire pump body is not reduced, the water flow suddenly becomes zero, and the water in the water inlet pipe 3 continuously enters the fire pump body, so that the pressure in the fire pump body is suddenly increased; at this time, water in the fire pump body continuously enters the first pressure relief pipe 51 and the second pressure relief pipe 61, the pressure valves in the first pressure relief pipe 51 and the second pressure relief pipe 61 are opened, when water flow enters the first pressure relief pipe 51, the water flow impacts the first sealing gasket 52 to enable the first sealing gasket 52 to move downwards, the first pressure relief pipe 51 is dredged when the first sealing gasket 52 moves downwards, the water flow flows out from two sides of the first sealing gasket 52, in order to prevent the first pressure relief pipe 51 from being damaged due to the excessive water flow, a part of the water can be divided by the dividing cavity 7, the impact force of the water is reduced, and the first pressure relief pipe 51 consisting of the bottleneck-shaped pressure relief pipe 511, the first sleeve ring 512, the second sleeve ring 513 and the elastic ring 514 ensures that the first pressure relief pipe 51 has flexibility, impact of water on the first pressure relief pipe 51 can be further reduced, and the service life of the first pressure relief pipe 51 is prolonged; when the first sealing gasket 52 moves downwards, the cavity 56 is restored, the gas in the air cylinder 66 returns to the cavity 56 again, at the moment, the output end of the air cylinder 66 moves downwards, the first electric contact 651 and the second electric contact 652 are disconnected, the second sealing gasket 62 moves downwards, the second pressure relief pipe 61 is dredged, and at the moment, the water entering the water inlet pipe 3 is discharged through the second pressure relief pipe 61; the first pressure relief unit 5 and the second pressure relief unit 6 are matched for use, so that the water pressure in the fire pump body can be quickly reduced, the fire pump body is not easily damaged due to overlarge water pressure, and the phenomenon of pipe explosion of the water inlet pipe 3 and the water outlet pipe 4 due to overlarge water pressure is avoided; and after the fire pump body release is accomplished, under the effect of spring, ejector pin 54 rebound, No. one sealed pad 52 from new laminating with the lateral wall of pressure-relief pipe 51, make cavity 56 compression exhaust gas of No. one sealed pad 52, the exhaust gas gets into in the cylinder 66 once more through trachea 661, make the output of cylinder 66 stretch out again, No. one electric contact 651 and No. two electric contact 652 contact again, fixed block 65 is from new circular telegram, fixed block 65 and No. two sealed platforms repel each other, No. two sealed pad 62 and No. two pressure-relief pipe 61's lateral wall laminate once more, at this moment, pressure-relief pipe 51 and No. two pressure-relief pipe 61 resume sealed state from new, use when convenient next release.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
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 (6)
1. The utility model provides a fire pump for fire engine which characterized in that: comprises a fire-fighting water pump body (1) and a controller; the controller is used for controlling the fire-fighting water pump to work; the fire pump body (1) is fixed in a water tank of a fire engine through a fixed sucker (2); the fire-fighting water pump body (1) is respectively provided with a water inlet pipe (3) and a water outlet pipe (4); the water outlet pipe (4) is communicated with a first pressure relief unit (5), the first pressure relief unit (5) is used for reducing water pressure in the fire pump body, the water inlet pipe (3) and the water outlet pipe (4), and the first pressure relief unit (5) comprises a first pressure relief pipe (51), a first sealing gasket (52), a first sealing head (53) and a push rod (54); a pressure valve is arranged in the first pressure relief pipe (51), a first sealing gasket (52) is completely attached to the side wall of the first pressure relief pipe (51), and the first sealing gasket (52) seals the first pressure relief pipe (51) when the first pressure relief unit (5) does not work; the first sealing head (53) is positioned below the first sealing gasket (52), and the ejector rod (54) is positioned below the first sealing head (53) and fixedly connected with the first sealing head (53); one end, far away from the first sealing head (53), of the ejector rod (54) is sleeved with a fixing ring (55), two sides of the fixing ring (55) are fixedly connected with the side wall of the first pressure relief pipe (51), and a hole is formed in the fixing ring (55); when the first sealing head (53) moves downwards, the ejector rod (54) slides in the fixing ring (55); a spring is arranged between the first sealing head (53) and the ejector rod (54), and the spring is sleeved on the ejector rod (54); a cavity (56) is formed in the part, contacted with the side wall of the first pressure relief pipe (51), of the first sealing gasket (52), gas is filled in the cavity (56), and when the first sealing gasket (52) seals the first pressure relief pipe (51), the cavity (56) is compressed to discharge the gas in the cavity (56); the first pressure relief pipe (51) is composed of two bottleneck-shaped pressure relief pipes (511), a first sleeve ring (512), a second sleeve ring (513) and an elastic ring (514), the first sleeve ring (512), the second sleeve ring (513) and the elastic ring (514) are located between the adjacent bottleneck-shaped pressure relief pipes (511), the first sleeve ring (512) is fixedly connected with the bottleneck-shaped pressure relief pipes (511), the second sleeve ring (513) is located on the outer side of the first sleeve ring (512), the end portion of the elastic ring (514) is located between the first sleeve ring (512) and the second sleeve ring (513), and the first sleeve ring (512) and the second sleeve ring (513) are used for screwing the elastic ring (514) together; no. two release units (6) are communicated with the water inlet pipe (3), and the No. two release units (6) are used for assisting the No. one release unit (5) to eliminate water pressure in the fire pump body, the water inlet pipe (3) and the water outlet pipe (4).
2. The fire pump as claimed in claim 1, wherein: the second pressure relief unit (6) comprises a second pressure relief pipe (61), a second sealing gasket (62), a second sealing head (63), a sliding rod (64), a fixing block (65) and an air cylinder (66); a pressure valve is arranged in the second pressure relief pipe (61); a fixing table (67) is arranged below the air cylinder (66), the fixing table (67) is fixedly connected with the side wall of the second pressure relief pipe (61), and a hole is formed in the fixing table (67); the bottom of the cylinder (66) is fixedly connected with the fixed table (67), the input end of the cylinder (66) is communicated with a cavity (56) in the first sealing gasket (52) on the first pressure relief pipe (51) through an air pipe (661), the output end of the cylinder (66) is fixedly connected with the fixed block (65), one end, far away from the cylinder (66), of the fixed block (65) is fixedly connected with the sliding rod (64), one end, far away from the fixed block (65), of the sliding rod (64) is sleeved with the second sealing head (63), one end, far away from the sliding rod (64), of the second sealing head (63) is fixedly connected with the second sealing gasket (62), a spring is arranged between the second sealing head (63) and the sliding rod (64), and the spring is sleeved on the sliding rod (64); when the first sealing gasket (52) seals the first pressure relief pipe (51), the cavity (56) compresses exhausted gas to enter the cylinder (66) so that the output end of the cylinder (66) extends out, and when the output end of the cylinder (66) extends out, the second sealing gasket (62) is attached to the second pressure relief pipe (61) to seal the second pressure relief pipe (61).
3. The fire pump as claimed in claim 2, wherein: a diversion cavity (7) is formed in a sealing head (53) and an ejector rod (54) in the pressure relief pipe (51), the diversion cavity (7) is symmetrically arranged by taking the vertical central line of the pressure relief pipe (51) as a reference, and the diversion cavity (7) is used for reducing the impact of water flow on the pressure relief pipe (51).
4. The fire pump as claimed in claim 2, wherein: the second sealing head (63) is made of a magnetic material, the fixing block (65) is an electromagnet, and the magnetism of the fixing block (65) when the fixing block is electrified is the same as that of the second sealing head (63); the fixed block (65) is fixedly connected with a first electric contact (651) on one side, a second electric contact (652) is fixedly connected to the side wall of the second pressure relief pipe (61), the first electric contact (651) and the second electric contact (652) are electrically connected with the controller, and the fixed block (65) is electrified when the first electric contact (651) is in contact with the second electric contact (652).
5. The fire pump as claimed in claim 1, wherein: the part of the elastic ring (514) located in the first lantern ring (512) and the second lantern ring (513) is sleeved with a steel wire sleeve (8) with a circular cross-section structure, and the steel wire sleeve (8) is used for protecting the elastic ring (514).
6. The fire pump as claimed in claim 5, wherein: the thread cross-sectional structure between the first lantern ring (512) and the second lantern ring (513) is semicircular, the semicircular thread is in threaded connection with the circular steel wire sleeve (8) to enable the first lantern ring (512), the second lantern ring (513) and the elastic ring (514) to be completely attached, and meanwhile, the elastic ring (514) can also be fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910078287.2A CN109763984B (en) | 2019-01-28 | 2019-01-28 | Fire pump for fire engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910078287.2A CN109763984B (en) | 2019-01-28 | 2019-01-28 | Fire pump for fire engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109763984A CN109763984A (en) | 2019-05-17 |
| CN109763984B true CN109763984B (en) | 2021-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910078287.2A Active CN109763984B (en) | 2019-01-28 | 2019-01-28 | Fire pump for fire engine |
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| Country | Link |
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| CN (1) | CN109763984B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216045A (en) * | 2008-01-07 | 2008-07-09 | 张建明 | Fire-fighting truck water pump capable of automatically unloading |
| CN201916233U (en) * | 2010-11-01 | 2011-08-03 | 江苏卡威专用汽车制造有限公司 | Fire control water pump device |
| CN202876181U (en) * | 2012-11-20 | 2013-04-17 | 长沙中联消防机械有限公司 | Water suction pipeline system of fire pump and fire truck |
| CN205559241U (en) * | 2016-03-11 | 2016-09-07 | 国家电网公司 | Constant voltage control fire pump |
| CN207085145U (en) * | 2017-07-07 | 2018-03-13 | 湖北博利机电有限公司 | A kind of fire pump of carry potential overflow pipeline |
-
2019
- 2019-01-28 CN CN201910078287.2A patent/CN109763984B/en active Active
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| CN109763984A (en) | 2019-05-17 |
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Effective date of registration: 20210526 Address after: 317500 No.2, building 5, Wufeng industrial pioneer park, Daxi Town, Wenling City, Taizhou City, Zhejiang Province Applicant after: TAIZHOU DALANG PUMP Co.,Ltd. Address before: 057500 Sida Motor Co., Ltd., No.1, Minsheng street, Feixiang Economic Development Zone, Handan City, Hebei Province Applicant before: Wang Hao |
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