A kind of fire demand water pump
The present invention relates to a kind of fire demand water pump, belong to pump technology field.
At present, the fire pump installed in built fire supply system, not only exist and be unsatisfactory for existing national regulation
The phenomenon of " fire water-supply and hydrant system technical specification " GB50974-2014 associated specifications, and exist many hidden
Suffering from, the fire pump used at engineering construction field at present, generally there is hump in its flow-lift performance curve, it may appear that water
Pump out the mouth of a river at the same pressure, there are two different flows.Now, fire pump surge runs, and does not reaches fire department
Fire extinguishing technological requirement, it addition, engineering construction field uses constant-pressure tangent fire pump in a large number, this pump capacity-lift performance
Curve is a horizontal line.In fire department fire extinguishing under battle conditions, the situation of super design discharge often occurs with water.Now, constant voltage is cut
Line fire water pump lift declines rapidly, and fire supply system lost efficacy rapidly.The performance curve of constant-pressure tangent fire pump does not has
Certain gradient, it is difficult to realize automatically controlling of fire supply system by pressure change.So industry needs a kind of novel knot
The water pump of structure, to solve problems faced in industry.
Summary of the invention:
The technical problem to be solved is: provide a kind of fire demand water pump, to solve problems faced in industry.
In order to solve above-mentioned technical problem, the present invention is achieved by the following technical solutions: a kind of fire demand water pump, if
Being equipped with base, the left side of described base is provided with the pump housing, and the bottom of the described pump housing is provided with the pipe plug that discharges water.
The described pump housing be provided centrally with impeller, the right side of the described pump housing is provided with pump cover, described pump cover and the described pump housing
Between be placed with sealing ring.
The centre bore being provided centrally with horizontal structure of the described pump housing, the right side of the described pump housing is provided with motor, described electricity
Machine is provided with motor shaft.
Described motor shaft is installed in described centre bore, and described impeller is received on described motor shaft with being bonded, described impeller
Right-hand member be provided with impeller nut.
It is provided with pad between described impeller and described impeller nut, arranges organic between described motor shaft and described pump cover
Tool seals, and described mechanical seal is thread seal, and described pump cover is additionally provided with vent valve.
As preferably, between described pump cover and described motor, be provided with protective cover, described protective cover and described motor shaft it
Between have retaining ring.
As preferably, described impeller is five chip semi-open-type impellers, and the material of described impeller is bronze.
Compared with prior art, usefulness of the present invention is: be provided with motor, impeller key and impeller nut is fixed
On motor, so that motor energy impeller rotates, and on pump cover, it is provided with vent valve, it is thus possible to made by the pump housing
The gas produced during with is drained, and present configuration is simple, and easy to operate, cost is relatively low.
Accompanying drawing illustrates:
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention.
In figure: 1, base；2, discharge water pipe plug；3, the pump housing；4, impeller；5, pump cover；6, key；7, impeller nut；8, pad；9、
Sealing ring；10, vent valve；11, mechanical seal；12, protective cover；13, retaining ring；14, motor.
Detailed description of the invention:
Below in conjunction with the accompanying drawings and detailed description of the invention describes the present invention: according to a kind of fire-fighting shown in Fig. 1
With water pump, being provided with base 1, the left side of described base 1 is provided with the pump housing 3, and the bottom of the described pump housing 3 is provided with the pipe plug 2 that discharges water.
The described pump housing 3 be provided centrally with impeller 4, the right side of the described pump housing 3 is provided with pump cover 5, and described pump cover 5 is with described
Sealing ring 9 it is placed with between the pump housing 3.
The centre bore being provided centrally with horizontal structure of the described pump housing 3, the right side of the described pump housing 3 is provided with motor 14, institute
State motor 14 and be provided with motor shaft.
Described motor shaft is installed in described centre bore, and described impeller 4 key 6 is connected on described motor shaft, described leaf
The right-hand member of wheel 4 is provided with impeller nut 7.
It is provided with pad 8 between described impeller 4 and described impeller nut 7, arranges between described motor shaft and described pump cover 5
There is mechanical seal 11.
Described mechanical seal 11 is thread seal, and described pump cover 5 is additionally provided with vent valve 10.
Protective cover 12 it is provided with, between described protective cover 12 and described motor shaft between described pump cover 5 and described motor 14
There is retaining ring 13.
Described impeller 4 is five chip semi-open-type impellers, and the material of described impeller 4 is bronze.
During use, it is provided with base 1, base 1 is provided with the pump housing 3 and motor 14, in the pump housing 3, is provided with impeller 4,
Being installed on the motor shaft of motor 14 by impeller 4, impeller 4 is fixed on motor shaft by key 6 and impeller nut 7, the described pump housing 3
Being additionally provided with pump cover 5, be provided with protective cover 12 between pump cover 5 and motor 14, pump cover 5 also sets up vent valve 10, impeller 4 makes
Can produce gas during with, gas influences whether the use of the pump housing 3 in the pump housing 3, will be produced by vent valve 10 in the pump housing 3
It is emphasized that: be the most only presently preferred embodiments of the present invention, not the present invention is made any in form
Restriction, any simple modification, equivalent variations and the modification that above example is made by every technical spirit according to the present invention,
All still fall within the range of technical solution of the present invention.