A kind of novel vertical sand pump
The utility model relates to a kind of sand pump, is specifically related to a kind of vertical sand pump for the oil/gas drilling circulatory system.
Sand pump is a kind of of centrifugal pump, and its working principle is: the main flow passage components of sand pump have suction chamber, impeller and pumping chamber.Suction chamber is positioned at the water intake front of impeller, plays the effect of liquid being guided into impeller; Pumping chamber mainly contains spiral pressurized water chamber (scroll casing type), stator and three kinds of forms of spatial guide blade; Impeller is the most important operation element of pump, is the heart of flow passage components, and impeller is comprised of cover plate and middle blade.
Before the sand pump work, liquid will be full of first in the pump, then start sand pump, the impeller quick rotation, the blade of impeller orders about liquid and rotates, when rotating, liquid rely on inertia to the impeller outer edge diffluence, impeller is from suction chamber inspiration liquid simultaneously, in this course, the liquid in the impeller streams blade, and liquid effects one lift is in blade in streaming motion, conversely blade with one therewith the masterpiece of lift equal and opposite in direction, opposite direction be used for liquid, this power is done work to liquid, makes liquid obtain energy and flows out impeller, and at this moment the kinetic energy of liquid and pressure energy all increase.
Sand pump relies on rotary blade that the effect of liquid is passed to liquid to the mechanical energy of prime mover.Because the effect liquid of sand pump flows to the process of outlet from impeller inlet, its speed energy and pressure energy are all increased, by the liquid process delivery chamber that impeller is discharged, most of speed can convert pressure energy to, then transfers out along discharge conduit, at this moment, the impeller inlet place forms vacuum or low pressure because of the discharge of liquid, and the liquid in the priming reservoir is pressed into the import of impeller under the effect of liquid level pressure (barometric pressure), so the impeller that is rotating just constantly sucks and discharges liquid continuously.
Generally speaking, the mud in the oil/gas drilling circulatory system is all carried by horizontal sand pump; But in some occasion, because erection space is limited, horizontal sand pump often can not satisfy the needs of manufacturing operation, and the Horizontal sand pump structure is complicated, because it has independent axle, pump seat, bearing, bearing cap, coupling, guard shield etc., not only causes the waste on the cost, and occupies construction space.
The model utility content
The utility model has overcome the deficiencies in the prior art, provides a kind of overall structure of solution simpler, compact, shaft seal reliable performance, long service life, and can be used for open-air wild environment, be applicable to the vertical sand pump of field extreme environment work.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
A kind of vertical sand pump comprises bearing, motor cabinet, pump case, suction chamber, and pump case is fixed on the bearing; Described vertical sand pump also comprises impeller, pump cover, motor, and described impeller is connected by transmission shaft with motor, and motor is fixedly connected on motor cabinet top; Described motor cabinet is fixedly connected on pump case top.
Further technological scheme is to adopt compound seal between impeller and the housing.
Further technological scheme is that compound seal is divided into primary seal and auxiliary seal; Described primary seal is high-anti-friction hard alloy mechanical seal; Described auxiliary seal is flexible graphite stuffing.
Further technological scheme is that motor is the extension shaft anti-explosion motor.
Further technological scheme is that the motor top is provided be used to the ceiling that blocks sleet.
Further technological scheme is that pump case is fixed on the bearing by flange.
Further technological scheme is that motor cabinet is fastened on the pump case top by flange.
Further technological scheme is that motor is fastened on the motor cabinet top by flange.
Compared with prior art, the beneficial effects of the utility model are: overall structure is simpler, compact, does not have independent axle, pump seat, bearing, bearing cap, coupling, guard shield etc., has not only reduced cost, and axial dimension, shaft seal reliable performance, long service life have been shortened.Can be used for open-air wild environment, be applicable to field extreme environment work.
Description of drawings
Fig. 1 is the overall structure schematic diagram of a kind of mode of execution of the utility model.
Below in conjunction with accompanying drawing the utility model is further elaborated.
As shown in Figure 1, Fig. 1 shows an embodiment's of the utility model overall structure schematic diagram.A kind of vertical sand pump of the utility model embodiment as shown in Figure 1, comprising: comprise bearing 1, bearing is the pillar of whole sand pump, and bearing is fixed on the horizontal plane, is used for supporting whole vertical sand pump.A kind of vertical sand pump of the present embodiment also comprises pump case 3, suction chamber 2, and as preferred embodiment, the suction port of the suction chamber of the present embodiment is the pipeline of a bending; Pump case 3 is fixed on the bearing 1; As preferred embodiment, the pump case 3 of the present embodiment is fastened on the bearing 1 by flange.This is implemented described vertical sand pump and also comprises impeller 4, pump cover 5, mechanical seal 8, and impeller 4 and motor 7 are connected by transmission shaft.As preferred embodiment, the impeller 4 of the present embodiment adopts compound seal with pump cover 5, prevents that drilling fluid is leaked in the housing.The compound seal of the present embodiment is divided into primary seal and auxiliary seal; Primary seal is high-anti-friction hard alloy mechanical seal 8, and the mechanical seal 8 of the present embodiment is installed between the impeller and static housing of rotation.This mechanical seal comprises rotating ring, stop pin, stationary ring, stationary ring sealing, spring and spring seat.Rotating ring comprises wear ring, overcoat, cutting ferrule and rubber corrugated pipe, wear ring is sleeved in the overcoat, the wear ring cylindrical be provided with the overcoat inner circle on several grooves of being complementary of several boss, the inner ring of overcoat and cutting ferrule is equipped with a rubber corrugated pipe, inner circle and the axle of rubber corrugated pipe closely cooperate, and cylindrical and cutting ferrule closely cooperate.This mechanical seal is by arranging rubber corrugated pipe at rotating ring, strengthened following of rotating ring compensatory, improved the sealability of the contact end face between rotating ring and the stationary ring, adopted the novel high wear-resistant Hardmetal materials can with life-span of mechanical seal than the raising of conventional construction about 1 times.Simultaneously, the close-fitting static seal of rubber corrugated pipe and axle has also improved the reliability of sealing.The auxiliary seal of the present embodiment is flexible graphite stuffing.By cooperating of primary seal and auxiliary seal, effectively prevented from leakage from having strengthened working life.A kind of vertical sand pump of the present embodiment also comprises: motor cabinet 6, motor 7, motor cabinet 6 is fastened on the pump case top by flange, motor 7 is fastened on motor cabinet 6 tops by flange, whole Placement has been saved construction space so that a kind of vertical sand pump of the present embodiment has been realized vertical annexation.As preferred embodiment, the motor 7 of the present embodiment is the extension shaft anti-explosion motor.According to the present embodiment, as mode of execution preferably, another embodiment of the present utility model is on first embodiment's basis, and the top of motor 7 is bolted to connection, and is provided be used to the ceiling that blocks sleet.The motor that is arranged so that of ceiling can not be subject to the impact of weather, can be used for open-air wild environment, is applicable to field extreme environment work.
" embodiment " who speaks of in this manual, " another embodiment ", " embodiment ", etc., refer to specific features, structure or the characteristics described in conjunction with this embodiment and be included among at least one embodiment that the application's generality describes.A plurality of local appearance statement of the same race not necessarily refers to same embodiment in specification.Furthermore, when describing a specific features, structure or characteristics in conjunction with arbitrary embodiment, what advocate is to realize that in conjunction with other embodiments this feature, structure or characteristics also drop in the scope of the present utility model.
Although with reference to a plurality of explanatory embodiments of the present utility model the utility model is described here, but, should be appreciated that, those skilled in the art can design a lot of other modification and mode of executions, and these are revised and mode of execution will drop within the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to constituent elements and/or the layout of subject combination layout.Except modification that constituent elements and/or layout are carried out with improving, to those skilled in the art, other purposes also will be obvious.