CN114294242B - Working method of drainage type constant-pressure self-priming pump with internal opening pressure relief valve body - Google Patents
Working method of drainage type constant-pressure self-priming pump with internal opening pressure relief valve body Download PDFInfo
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- CN114294242B CN114294242B CN202111671432.1A CN202111671432A CN114294242B CN 114294242 B CN114294242 B CN 114294242B CN 202111671432 A CN202111671432 A CN 202111671432A CN 114294242 B CN114294242 B CN 114294242B
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Abstract
The invention relates to a working method of a drainage constant-pressure self-priming pump with an inward opening pressure relief valve body, wherein the drainage pump rotates together due to rotation of a motor rotating shaft, so that air in a pump inlet is rapidly discharged into a pump body, and then is discharged out of the pump through an impeller; liquid in the external storage tank is pumped into the suction cavity through the drainage pump, and then liquid with higher pressure is obtained by the rotating impeller under the action of high-speed inertial centrifugal force and pumped out of the pump to enter the discharge pipeline and is conveyed to a required place. The invention improves the conveying capacity of the impeller, and is suitable for conveying liquid with different viscosities by adjusting the adjusting screw rod with the inward opening type pressure relief valve body.
Description
Technical Field
The invention relates to a working method of a drainage type constant-pressure self-priming pump with an inward opening pressure relief valve body.
Background
And (3) a pump: is a machine for transporting liquid.
The pump is divided into the following components according to the working principle: power pumps (impeller type), positive displacement pumps (positive displacement type), other types of pumps. The dynamic pump (impeller type) is a pump that uses an impeller that rotates at a high speed, and that delivers liquid by applying work to the liquid by means of blades, such as a centrifugal pump, a peripheral pump, a mixed flow pump, an axial flow pump, and the like. The method is divided into the following modes of impeller suction: single suction pumps and multiple suction pumps; the number of the impellers is divided into: single stage pumps and multistage pumps; the pump is divided according to the position of a pump shaft: horizontal pump, vertical pump, etc.; the pump is divided into a plurality of modes according to the installation height and the working mode of the pump: self-priming centrifugal pumps and suction centrifugal pumps.
Centrifugal pump characteristics: 1. the structure is simple, the operation is easy, and the adjustment and the control are convenient; 2, the flow is uniform, and the benefit is high; 3. the application range of flow and pressure is wide; 4. the device is suitable for conveying corrosive or suspended liquid, and has the advantages of low running noise, low manufacturing cost, durability, excellent stability and the like.
The self-priming centrifugal pump has certain self-priming capability, overcomes the defect that the common suction centrifugal pump has no self-priming capability, and can meet the requirements of various industries on self-priming delivery of fluid below the pump level. In the process of delivering large flow of liquid, the self-priming centrifugal pump has excellent performance because of the advantages of simple structure, higher benefit, low noise, low manufacturing cost and the like.
However, in practical operation, a self-priming centrifugal pump cannot be used particularly for some liquids having a viscosity, and the viscosity of the liquid greatly changes with a change in temperature, particularly when the liquid is transported at a low temperature (the viscosity of the liquid increases at a low temperature) and some liquids having a viscosity.
The reasons are as follows:
1. because the centrifugal pump is required to have a larger suction force and an impeller to obtain a larger inertial centrifugal force when the centrifugal pump is used for accommodating low temperature and liquid with a certain viscosity; meanwhile, the shaft power is increased, and the power of the motor is increased to make up for the conditions that the self-priming centrifugal pump is used for conveying low-temperature liquid with certain viscosity to operate; therefore, a certain flow speed and flow rate can be achieved, and the output liquid pressure is met. Particularly in low-temperature viscosity liquids, the output liquid pressure is high due to poor liquid fluidity, so that the shaft power is increased, and the motor may be overloaded and burnt.
2. Because the proportion of the mixture of air and liquid is different when the pump is just started, the load force of the impeller is also different, thus the unbalance of the output pressure is caused, the shaft power of the motor is unbalanced, the operation of the motor is unstable, and the service lives of the impeller and the motor are greatly shortened.
3. When the shaft power is increased, the self-priming pump is used for conveying high-temperature liquid, namely when the viscosity of the liquid is greatly changed into low-viscosity liquid along with the change of temperature, the self-priming pump is used for conveying the liquid to reach a certain flow speed and flow rate, and the liquid has low viscosity, good fluidity and low conveying liquid pressure. Therefore, the pressure difference between low-temperature liquid with certain viscosity and high-temperature low-viscosity liquid conveyed by the self-priming centrifugal pump is relatively large, and the self-priming centrifugal pump cannot automatically adjust the output pressure, so that the pressure value of the output liquid cannot be kept to always meet the working condition requirement, and the equipment system is unstable.
4. In practical operation, particularly for some liquids with viscosity, and the viscosity of the liquid changes greatly with the change of temperature, particularly for low temperature delivery and some viscosity liquids, the self-priming centrifugal pump is influenced by the characteristics of the liquid (the pump is operated by the rotation shaft of the motor to drive the impeller on the rotation shaft to rotate, if no liquid is in the pump, only air is used, and the centrifugal force generated after the rotation is small due to the low air density, so that the low pressure formed in the central area of the impeller is insufficient to suck the liquid in the external storage tank into the pump; therefore, after a certain amount of liquid is added into the pump body, the pump shaft drives the impeller to rotate together after the pump body is started, the liquid between the blades is forced to rotate, the liquid is thrown to the periphery from the center of the impeller under the action of inertia centrifugal force, the static pressure of the liquid flowing to the periphery of the impeller is increased, the flow rate is increased, the liquid leaves the impeller and enters an extrusion cavity in the pump body, the liquid is decelerated due to gradual expansion of a flow passage of the pump body, most of kinetic energy is converted into static pressure, and then the liquid with higher pressure enters a discharge pipeline from a discharge port of the pump and is conveyed to a required place.
Therefore, it is important to find a drainage type constant pressure self-priming pump with an internal opening pressure relief valve body, which can be suitable for conveying low-temperature high-viscosity liquid and high-temperature low-viscosity liquid, and has stable operation of a motor and stable output pressure.
Disclosure of Invention
The invention aims to overcome the defects and provide the working method of the drainage type constant-pressure self-priming pump with the internal opening pressure relief valve body, which can be suitable for conveying low-temperature high-viscosity liquid and high-temperature low-viscosity liquid, and the motor can stably operate and output pressure is stable, so that the system has high operation reliability, constant pressure, difficult damage and stable operation.
The purpose of the invention is realized in the following way:
1. the drainage type constant-pressure self-priming pump with the internal opening pressure relief valve body is characterized by comprising a pump body and a motor, wherein the pump body and the motor are arranged left and right; the motor comprises a motor main body, the bottom of the motor main body is connected with a pump base, the left end of the motor main body is provided with a motor flange plate, the motor flange plate is fixedly connected with a pump body flange plate on the left side of the motor flange plate through bolts, the motor main body stretches out a motor rotating shaft leftwards and stretches out the motor rotating shaft leftwards to the left of the motor flange plate, the motor rotating shaft also sequentially penetrates through the pump body flange plate and the impeller leftwards, and the left end of the motor rotating shaft is fixedly connected with the left end face of the impeller through an impeller fixing screw; the middle part of the left end of the pump body is also provided with a drainage pump, the pump body outside the inlet check valve is internally provided with a drainage pump inlet pipeline, the drainage pump inlet pipeline is connected with the inlet of the drainage pump, the pump body inside the inlet check valve is internally provided with a drainage pump outlet pipeline, the outlet of the drainage pump is connected with the drainage pump outlet pipeline, that is, fluid entering from the pump inlet can be separated into two branches, one branch directly enters the suction cavity through the inlet check valve, and the other branch directly enters the suction cavity through the drainage pump inlet pipeline, the drainage pump and the drainage pump outlet pipeline; the specific working method is as follows:
the air in the pump inlet is quickly discharged into the pump body due to the rotation of the motor rotating shaft and then is discharged out of the pump outlet through the impeller, the motor rotating shaft rotates to drive the impeller and the drainage pump, and when the impeller rotates at a high speed, the air in the suction cavity is discharged out of the pump outlet through the centrifugal force of the impeller due to the fact that the suction cavity of the pump body is the same as the air pressure of the pump inlet, the suction cavity is negative pressure, the pump inlet is at the atmospheric pressure and is higher than the pressure of the suction cavity, so that the inlet check valve is opened, the drainage pump rotates together at the same time, the air in the pump inlet is introduced into the suction cavity together, and the air is discharged out of the pump outlet through the impeller, so that the operation is repeated; when the pressure of the suction cavity and the pressure of the pump inlet are balanced, the inlet check valve is closed, the air at the pump inlet is continuously discharged into the suction cavity through the drainage pump by the rotation of the drainage pump, and then the air is discharged out of the pump by the impeller, so that the air in the suction cavity is repeatedly and infinitely nearly exhausted; liquid in the external storage tank is pumped into the suction cavity through the drainage pump, and then liquid with higher pressure is obtained by the rotating impeller under the action of high-speed inertial centrifugal force and pumped out of the pump to enter the discharge pipeline and is conveyed to a required place.
As one preferable, the motor comprises a motor main body, the bottom of the motor main body is connected with a pump base, the left end of the motor main body is provided with a motor flange plate, the motor flange plate is fixedly connected with a pump body flange plate on the left side of the motor flange plate through bolts, the motor main body stretches out a motor rotating shaft leftwards and stretches out the motor rotating shaft leftwards to the left of the motor flange plate, the motor rotating shaft also sequentially penetrates through the pump body flange plate and the impeller leftwards, and the left end of the motor rotating shaft is fixedly connected with the left end face of the impeller through an impeller fixing screw.
Preferably, a drainage pump is further arranged in the middle of the left end of the pump body, a drainage pump inlet pipeline is arranged in the pump body outside the inlet check valve, the drainage pump inlet pipeline is connected with an inlet of the drainage pump, a drainage pump outlet pipeline is arranged in the pump body inside the inlet check valve, an outlet of the drainage pump is connected with the drainage pump outlet pipeline, that is, fluid entering from the pump inlet can be separated into two branches, one branch directly enters the suction cavity through the inlet check valve, and the other branch directly enters the suction cavity through the drainage pump inlet pipeline, the drainage pump and the drainage pump outlet pipeline.
Preferably, the drainage pump comprises a drainage pump shell, wherein a driven gear and a driving gear which are arranged up and down are arranged in the drainage pump shell, the driven gear and the driving gear are meshed with each other, the meshed height is called as the meshed height, the driven gear penetrates through a transverse driven shaft, the driving gear penetrates through a transverse driving shaft, the left end and the right end of the driven shaft are arranged in a driven shaft cavity of the upper half section in the drainage pump shell through bearings, the inner diameter of the driven shaft cavity is matched with the size of the driven gear, the left end and the right end of the driving shaft are arranged in a driving shaft cavity of the lower half section in the drainage pump shell through bearings, the inner diameter of the driving shaft cavity is matched with the size of the driving gear, the right end of the driving shaft penetrates out of the drainage pump shell and is in power connection with a motor rotating shaft through a coupling shaft, and a driving shaft is sealed at the joint of the driving shaft and the coupling shaft; the drainage pump shell comprises a drainage pump shell main shell body of a right half section and a drainage pump shell end cover of a left end, the drainage pump shell end cover is fixed on the drainage pump shell main shell body through screws, a left inlet hole, an outlet hole and a driving shaft hole are further formed in the right end of the drainage pump shell, the inlet hole is communicated with a liquid inlet cavity, the height of the liquid inlet cavity is slightly higher than the meshing height and is staggered with the shaft core of a driven shaft cavity, the outlet hole is communicated with a liquid outlet cavity, the height of the liquid outlet cavity is slightly lower than the meshing height and is staggered with the shaft core of the driving shaft cavity, a vertical axis plane is formed between the axis of the driven shaft and the axis of the driving shaft, the inlet hole and the outlet hole are respectively located on the front side and the rear side of the axis plane, and the driving shaft hole and the driving shaft are concentrically arranged. The drainage pump inlet pipeline is connected with the inlet hole, and the drainage pump outlet pipeline is connected with the outlet hole.
Preferably, the pump body and the motor are mounted together on a pump mount.
As a preference, a defoamer is arranged at the extrusion cavity directly below the pump outlet, and a buffer cavity is arranged directly below the defoamer.
Preferably, the pump housing at the top of the extrusion cavity is further provided with a liquid adding port, the liquid adding port is positioned at the upper left side of the extrusion cavity, and a liquid adding port bolt is arranged at the liquid adding port.
Preferably, a drain hole is formed in the pump housing at the left end of the pressure relief cavity, and a drain hole bolt is arranged at the drain hole.
Compared with the prior art, the invention has the beneficial effects that:
according to the self-priming pump, the in-band opening type pressure relief valve body is adopted, so that liquid initially entering the impeller cavity of the self-priming pump can return to the suction cavity through the in-band opening type pressure relief valve body, the impeller cavity of the self-priming pump is filled with liquid rapidly, the idle running of the impeller is avoided, the conveying capacity of the impeller is improved, and the conveying of liquids with different viscosities is adapted through adjusting the adjusting screw rod of the in-band opening type pressure relief valve body. The invention has the advantages of being capable of adapting to the low-temperature high-viscosity liquid delivery, adapting to the high-temperature low-viscosity liquid delivery, stably operating the motor and stably outputting pressure.
Drawings
Fig. 1 is a schematic structural diagram of a drainage type constant pressure self-priming pump with an internal opening pressure relief valve body in embodiment 1.
Fig. 2 is a schematic view of a detachable inward opening type adjustable pressure release valve of embodiment 1.
Fig. 3 is another state diagram of fig. 2.
Fig. 4 is an exploded view of fig. 2.
Fig. 5 is a schematic structural diagram of a drainage type constant pressure self-priming pump with an internal opening pressure relief valve body in embodiment 2.
Fig. 6 is a schematic view of a detachable inward opening type adjustable pressure release valve of embodiment 2.
Fig. 7 is another state diagram of fig. 6.
Fig. 8 is an exploded view of fig. 6.
Fig. 9 is a schematic view of the drainage pump of fig. 1.
FIG. 10 is an exploded view of FIG. 9
FIG. 11 is a cross-sectional view of a drainage pump.
Fig. 12 is a perspective cross-sectional view of a drainage pump.
Fig. 13 is a right side view of the drainage pump.
Wherein:
the drainage pump 400, the drainage pump housing 401, the drainage pump housing main housing 401.1, the drainage pump housing end cap 401.2, the driven gear 402, the driving gear 403, the driven shaft 404, the driving shaft 405, the inlet hole 406, the outlet hole 407, the driving shaft hole 408, the linkage shaft 409, the driven shaft cavity 410, the driving shaft cavity 411, and the driving shaft seal 412
The drainage constant pressure self priming pump 700 with an inward opening pressure relief valve body, pump body 701, pump housing 701.1, suction cavity 701.2, impeller cavity 701.3, extrusion cavity 701.4, pressure relief cavity 701.5, pump body flange 701.6, impeller 701.7, pump inlet 701.8, inlet check valve 701.9, pump outlet 701.10, defoamer 701.11, filling port 701.12, filling port bolt 701.13, drain port 701.14, drain port bolt 701.15, return port 701.16, pressure relief port 701.17, buffer cavity 701.18, motor 702, motor body 702.1, motor flange 702.2, motor rotation shaft 702.3, impeller set screw 702.4, pump base 703
Detachable inward-opening pressure relief valve body 610, pressure relief inlet 610.1, pressure relief outlet 610.2, valve body shell 611, valve body flange 611.1, adjusting screw 612, spring 613, valve core 614, locking nut 615 and sealing ring 616
Inward opening type adjustable pressure release valve 620
An inwardly opening adjustable ball relief valve 630.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to the drawings, the invention relates to a drainage constant pressure self-priming pump 700 with an inward opening pressure relief valve body, which comprises a pump body 701 and a motor 702, wherein the pump body 701 and the motor 702 are jointly installed on a pump base 703, the pump body 701 and the motor 702 are arranged left and right, the pump body 701 comprises a pump housing 701.1, the bottom of the pump housing 701.1 is connected with the pump base 703, a suction cavity 701.2, an impeller cavity 701.3, an extrusion cavity 701.4 and a pressure relief cavity 701.5 are arranged in the pump housing 701.1, a pump body flange 701.6 is arranged on the lower right half section of the pump housing 701.1, the impeller cavity 701.3 is arranged on the left side of the pump body flange 701.6, an impeller 701.7 is arranged in the impeller cavity 701.3, the suction cavity 701.2 is positioned on the left upper side of the impeller cavity 701.3 and is communicated with the left inlet of the impeller cavity 701.3, the extrusion cavity 701.4 is communicated with the top of the impeller cavity 701.3, the pressure relief cavity 701.5 is communicated with the bottom of the impeller cavity 701.3, the pump inlet 701.8 is arranged on the pump housing 701.1 on the left side of the suction cavity 701.2, an inlet check valve 701.9 is arranged at the position of the pump inlet 701.8, a pump outlet 701.10 is arranged on the pump housing 701.1 at the top of the extrusion cavity 701.4, a foam breaker 701.11 is arranged at the position of the pump housing 701.4 right below the pump outlet 701.10, a buffer cavity 701.18 is arranged right below the foam breaker 701.11, a liquid adding port 701.12 is also arranged on the pump housing 701.1 at the top of the extrusion cavity 701.4, the liquid adding port 701.12 is positioned at the upper left of the extrusion cavity 701.4, a liquid adding port bolt 701.13 is arranged at the position of the liquid adding port 701.12, a liquid discharging port 701.14 is arranged on the pump housing 701.1 at the left end of the pressure releasing cavity 701.5, a liquid discharging port bolt 701.15 is arranged at the position of the liquid discharging port 701.14, a liquid returning port 701.16 is arranged at the lower left corner of the suction cavity 701.2, a pressure releasing port 701.17 is arranged at the upper left corner of the pressure releasing cavity 701.5, the pressure releasing port 701.17 is left and right communicated, the pressure returning port 701.17 is positioned at the upper left side of the pressure releasing cavity 701.17, a pressure releasing area is formed between the pressure releasing port 701.17 and the pressure releasing valve body, the pressure release valve body installation position at the lower left section of the pump housing 701.1 is provided with an inward opening pressure release valve body, the inward opening pressure release valve body is provided with a pressure release inlet 610.1 and a pressure release outlet 610.2, the pressure release inlet 610.1 is communicated with the pressure release opening 701.17, and the pressure release outlet 610.2 is communicated with the liquid return opening 701.16.
The motor 702 comprises a motor main body 702.1, a pump base 703 is connected to the bottom of the motor main body 702.1, a motor flange 702.2 is arranged at the left end of the motor main body 702.1, the motor flange 702.2 is fixedly connected with a pump body flange 701.6 at the left side of the motor flange 702.2 through bolts, a motor rotating shaft 702.3 extends leftwards from the motor main body 702.1, a motor rotating shaft 702.3 extends leftwards from the motor flange 702.2, a motor rotating shaft 702.3 also sequentially penetrates through the pump body flange 701.6 and the impeller 701.4 leftwards, and the left end of the motor rotating shaft 702.3 is fixedly connected with the left end face of the impeller 701.7 through an impeller fixing screw 702.4.
The middle part of the left end of the pump body 701 is further provided with a drainage pump 400, a drainage pump inlet pipeline 708 is arranged in the pump body 701 outside the inlet check valve 701.9, the drainage pump inlet pipeline 708 is connected with the inlet of the drainage pump 400, a drainage pump outlet pipeline 709 is arranged in the pump body 701 inside the inlet check valve 701.9, the outlet of the drainage pump 400 is connected with the drainage pump outlet pipeline 709, that is, fluid entering from the pump inlet 701.8 can be split into two branches, one branch directly enters the suction cavity 701.2 through the inlet check valve 701.9, and the other branch directly enters the suction cavity 701.2 through the drainage pump inlet pipeline 708, the drainage pump 400 and the drainage pump outlet pipeline 709.
The drainage pump 400 comprises a drainage pump housing 401, a driven gear 402 and a driving gear 403 which are arranged up and down are arranged in the drainage pump housing 401, the driven gear 402 and the driving gear 403 are meshed with each other, the meshed height is called as the meshed height, the driven gear 402 passes through a transverse driven shaft 404, the driving gear 403 passes through a transverse driving shaft 405, the left end and the right end of the driven shaft 404 are installed in a driven shaft cavity 410 of the upper half section in the drainage pump housing 401 through bearings, the inner diameter of the driven shaft cavity 410 is matched with the size of the driven gear 402, the left end and the right end of the driving shaft 405 are installed in a driving shaft cavity 411 of the lower half section in the drainage pump housing 401 through bearings, the inner diameter of the driving shaft cavity 411 is matched with the size of the driving gear 403, the right end of the driving shaft 405 passes out of the drainage pump housing 401 and is in power connection with a motor rotating shaft 702.3 through a linkage shaft 409, and the motor rotating shaft 702.3 can be rotated at the same speed or in a differential mode through other power connection modes. A driving shaft seal 412 is arranged at the joint of the driving shaft 405 and the linkage shaft 409; the drainage pump housing 401 is shown to include drainage pump housing body 401.1 of right half section and drainage pump housing end cover 401.2 of left end, and drainage pump housing end cover passes through the screw fixation and is on drainage pump housing body, drainage pump housing 401 right-hand member still is equipped with left import hole 406, exit port 407 and initiative shaft hole 408, import hole 406 intercommunication inlet cavity, the height in inlet cavity is slightly higher than the meshing height and with the axle core dislocation of driven shaft cavity, exit port 407 intercommunication outlet cavity, the height in outlet cavity is slightly lower than the meshing height and with the axle core dislocation of driving shaft cavity, the axis of driven shaft 404 forms a vertical axis plane with the axis of driving shaft 405, import hole 406 and exit port 407 are located the front and back both sides of axis plane respectively, initiative shaft hole 408 and driving shaft 405 concentric arrangement. A drain pump inlet conduit 708 is connected to the inlet aperture 406 and a drain pump outlet conduit 709 is connected to the outlet aperture 407.
The operation principle of the drainage pump 400 is as follows:
the drainage pump rotates together due to the rotation of the motor rotating shaft, the air in the pump inlet is rapidly discharged into the pump body due to the structural characteristics and good sealing performance of the drainage pump, and then is discharged out of the pump outlet through the impeller, the motor rotating shaft rotates to drive the impeller and the drainage pump, and when the impeller rotates at high speed, the air in the suction cavity is discharged out of the pump outlet through the centrifugal force of the impeller because the suction cavity of the pump body is the same with the atmospheric pressure, and the suction cavity is negative pressure, and the pump inlet is at atmospheric pressure and is higher than the suction cavity pressure, so that the inlet check valve is opened, and meanwhile, the drainage pump rotates together, simultaneously, the air in the pump inlet is introduced into the suction cavity, and the air is discharged out of the pump outlet through the impeller, so that the cycle is repeated; when the pressure of the suction cavity and the pressure of the pump inlet are balanced, the inlet check valve is closed, and the rotation of the drainage pump enables the air at the pump inlet to be continuously discharged into the suction cavity through the drainage pump due to the structural characteristics and good sealing property of the drainage pump, and then the impeller discharges the air outside the pump, so that the air in the suction cavity is repeatedly and infinitely nearly discharged; liquid in the external storage tank is pumped into the suction cavity through the drainage pump, and then liquid with higher pressure is obtained by the rotating impeller under the action of high-speed inertial centrifugal force and pumped out of the pump to enter the discharge pipeline and is conveyed to a required place.
1. Thus, the problem that a certain amount of liquid needs to be added into the pump body to realize self-priming capability is solved; 2. solves the problem that the liquid cannot be used at a height of 5 to 9 meters below the pump level;
3. solves the problem that the air in the pump body and the inlet pipe needs to be removed for a long time, and can be completed in a few seconds.
Example 1
The inner opening type pressure relief valve body is a detachable inner opening type adjustable pressure relief valve 610;
the detachable inward opening type adjustable pressure release valve 610 specifically comprises a valve body shell 611, an adjusting screw rod 612, a spring 613, a valve core 614, a locking nut 615 and a sealing ring 616, wherein the right end of the valve body shell 611 is provided with a pressure release inlet 610.1, the top right section of the valve body shell 611 is provided with a pressure release outlet 610.2, the left end of the valve body shell 611 is outwards provided with a valve body flange 611.1, the valve body flange 611.1 is connected with the pump shell 701.1 through a connecting bolt, the inner wall of the left section of the valve body shell 611 is provided with an internal thread, the periphery of the adjusting screw rod 612 is provided with an external thread, the adjusting screw rod 612 is screwed into the valve body shell 611 from left to right to be in threaded fit with the valve body shell 611, the left section of the adjusting screw rod 612 is positioned on the left outer side of the valve body shell 611, the right end of the adjusting screw rod 612 is connected with the spring 613, the right end of the valve core 614 is connected with the valve core 614, the shape of the valve core 614 is mutually matched with the inner cavity of the valve body shell 611, the sealing ring 616 is positioned on the outer ring on the right end of the adjusting screw rod, the locking nut 615 is screwed on the left section of the adjusting screw rod 612 and abuts against the left outer wall of the valve body flange 611.1 so as to lock the position of the adjusting screw rod 612, the liquid with certain viscosity or liquid with certain pressure can be recovered.
Example 2
The inward opening type pressure relief valve body is an inward opening type adjustable pressure relief valve 620;
the difference between the internal opening type adjustable relief valve 620 and the detachable internal opening type relief valve 610 is that there is no valve body shell 611, the internal opening type adjustable relief valve 620 includes an adjusting screw 612, a spring 613, a valve core 614, a locking nut 615 and a sealing ring 616, the valve core 614 is a square valve core, an inner thread is provided on the inner wall of the left section of the pump housing 701.1 at the installation position of the relief valve body, an outer thread is provided on the periphery of the adjusting screw 612, the adjusting screw 612 is engaged with the inner thread in the installation position of the relief valve body from left to right, the left section of the adjusting screw 612 is located on the left outer side of the installation position of the relief valve body, the right end of the adjusting screw 612 is connected with the spring 613 to the right, the right end of the spring 613 is connected with the valve core 614, the appearance of the valve core 614 is mutually matched with the inner cavity of the installation position of the relief valve body, the sealing ring 616 is located on the outer ring of the right end of the adjusting screw 612, the locking nut 615 is screwed on the left section of the adjusting screw 612 and abuts against the left side of the valve body flange 611.1, and the expansion of the spring 613 is suitable for liquid of a certain viscosity liquid or a certain pressure liquid.
Example 3
The inward opening type pressure relief valve body is an inward opening type adjustable spherical pressure relief valve 630;
example 3 differs from example 2 in that the spool 614 is a spherical spool.
Working principle:
when the motor is started, the motor rotating shaft rotates to drive the impeller to rotate, if air exists in the pump body, the air density is low, and the centrifugal force generated after rotation is small, so that the low pressure formed in the central area of the impeller is insufficient to suck the liquid in the external storage tank into the pump body; therefore, after a certain amount of liquid is added into the pump body, the motor power can drive the impeller to force the liquid between the impeller blades to rotate, the liquid is thrown to the periphery from the center of the impeller under the action of inertia centrifugal force and obtains energy, the static pressure of the liquid flowing to the periphery of the impeller is increased, the flow speed is increased, the liquid leaves the impeller and enters an extrusion cavity in the pump body, the liquid is decelerated due to gradual expansion of a flow passage of the pump body, most of kinetic energy is converted into static pressure, and then the liquid with higher pressure enters a discharge pipeline from the pump and is conveyed to a required place.
When the liquid is thrown from the center of the impeller to the periphery, a low pressure area is generated in the center of the impeller, the pressure above the liquid level of the storage tank is larger than the pressure of the pump inlet, so that the check valve is automatically opened unidirectionally, the liquid is sucked into the center of the impeller, so that the liquid has self-sealing capacity in the pump body as long as the impeller continuously rotates, the liquid is loaded with air and is sent to the extrusion cavity together with the air, the air and the liquid are separated in the defoamer in the pump body, the air is discharged at the outlet of the pump, and the liquid stays in the extrusion cavity until the air of the pump inlet and the suction cavity is completely discharged through the pump, so that the liquid is continuously sucked and discharged and is continuously conveyed out.
Liquid at the periphery of the impeller can enter the liquid discharge cavity when being discharged from the impeller to the extrusion cavity, when the pressure of the liquid exceeds the set pressure, the liquid pushes the valve core of the pressure relief valve body, the spring in the pressure relief valve body is compressed, and high-pressure liquid enters from the pressure relief inlet and then is discharged from the pressure relief outlet to enter the suction cavity; the greater the pressure, the greater the compression of the spring inside the pressure relief valve body, the greater the opening area of the valve core and the pressure relief outlet of the pressure relief valve body, and the greater the flow area, the greater the flow quantity. When the pressure of the liquid is lower than the set pressure, the spring in the pressure relief valve body is reset, the valve core of the pressure relief valve body is closed, and the liquid can not enter the pressure relief outlet through the pressure relief inlet and be discharged to the suction cavity. The strength and the pressure of the spring can be adjusted by adjusting the adjusting screw rod, and the pressure of the valve core on the pressure release inlet of the valve body can be adjusted, namely the pressure and the flow of pressure release can be continuously adjusted. The locking nut locks the adjusting screw rod after the pressure relief adjusting process of the adjusting screw rod is required. The pressure relief valve body can be an independent device, and is embedded on the pump body to control the pressure and flow of the pump, so that the purpose of outputting constant pressure by the liquid of the pump is achieved.
The foregoing is merely a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All technical schemes formed by equivalent transformation or equivalent substitution fall within the protection scope of the invention.
Claims (6)
1. The utility model provides a take drainage type constant voltage self priming pump of interior open pressure release valve body's operation method, characterized by take interior open pressure release valve body's drainage type constant voltage self priming pump includes the pump body and motor, and pump body and motor are arranged about, the pump body includes the pump housing, be provided with suction chamber, impeller chamber, extrusion chamber and pressure release chamber in the pump housing, the lower half of the right side of pump housing is provided with the pump body ring flange, the left side of pump body ring flange is the impeller chamber, be provided with the impeller in the impeller chamber, the suction chamber is located the upper left side of impeller chamber and communicates with the left end import of impeller chamber, the extrusion chamber communicates with the top of impeller chamber, the pressure release chamber communicates with impeller chamber bottom, be provided with the pump inlet on the suction chamber left side, be provided with the import check valve in the pump inlet department, be provided with the pump outlet on the pump housing of extrusion chamber top, the lower left corner of suction chamber is provided with a liquid return mouth, the upper left corner of liquid return mouth is provided with a pressure release mouth, the pressure release mouth left and right side intercommunication, the liquid return mouth is located the upper left side of pressure release mouth, the region between liquid return mouth and the pressure release mouth forms a left side of a left side installation position of pressure release chamber and pressure release valve body, install a pressure release valve body communicates with a pressure release mouth, the pressure release valve body has an interior open pressure release mouth, with pressure release mouth is opened, the pressure release valve body is opened, and is opened; the inner opening type pressure relief valve body is a detachable inner opening type adjustable pressure relief valve, the detachable inner opening type adjustable pressure relief valve comprises a valve body shell, an adjusting screw rod, a spring, a valve core, a locking nut and a sealing ring, the right end of the valve body shell is provided with the pressure relief inlet, the right top section of the valve body shell is provided with the pressure relief outlet, the left end of the valve body shell is outwards provided with a valve body flange, the valve body flange is connected with a pump shell through a connecting bolt, the inner wall of the left section of the valve body shell is provided with an internal thread, the periphery of the adjusting screw rod is provided with an external thread, the adjusting screw rod is screwed into the valve body shell from left to right to be in threaded fit with the valve body shell, the left section of the adjusting screw rod is positioned at the left outer side of the valve body shell, the right end of the adjusting screw rod is connected with the spring to the right end of the valve core, the appearance of the valve core is mutually matched with the inner cavity of the valve body shell, the sealing ring is positioned at the right outer ring of the adjusting screw rod, and the locking nut is screwed on the left section of the adjusting screw rod and abuts against the left outer wall of the valve body flange so as to lock the position of the adjusting screw rod;
the motor comprises a motor main body, the bottom of the motor main body is connected with a pump base, the left end of the motor main body is provided with a motor flange plate, the motor flange plate is fixedly connected with a pump body flange plate on the left side of the motor flange plate through bolts, the motor main body stretches out a motor rotating shaft leftwards and stretches out the motor rotating shaft leftwards to the left of the motor flange plate, the motor rotating shaft also sequentially penetrates through the pump body flange plate and the impeller leftwards, and the left end of the motor rotating shaft is fixedly connected with the left end face of the impeller through an impeller fixing screw; the middle part of the left end of the pump body is also provided with a drainage pump, the pump body outside the inlet check valve is internally provided with a drainage pump inlet pipeline, the drainage pump inlet pipeline is connected with the inlet of the drainage pump, the pump body inside the inlet check valve is internally provided with a drainage pump outlet pipeline, the outlet of the drainage pump is connected with the drainage pump outlet pipeline, fluid entering from the pump inlet is divided into two branches, one branch directly enters the suction cavity through the inlet check valve, and the other branch directly enters the suction cavity through the drainage pump inlet pipeline, the drainage pump and the drainage pump outlet pipeline; the specific working method is as follows:
the motor rotation shaft rotates to drive the drainage pump to rotate, air in the pump inlet is rapidly discharged into the pump body, and then is discharged out of the pump outlet through the impeller, the motor rotation shaft rotates to drive the impeller and the drainage pump, and when the impeller rotates at a high speed, the air in the suction cavity is discharged out of the pump outlet through centrifugal force of the impeller because the suction cavity and the pump inlet of the pump are both at atmospheric pressure, and the suction cavity is at a negative pressure, and the pump inlet is at atmospheric pressure so as to be higher than the suction cavity pressure, so that the inlet check valve is opened, and meanwhile, the drainage pump rotates together, and simultaneously, the air in the pump inlet is introduced into the suction cavity, and then the air is discharged out of the pump outlet through the impeller, so that the operation is repeated; when the pressure of the suction cavity and the pressure of the pump inlet are balanced, the inlet check valve is closed, the air at the pump inlet is continuously discharged into the suction cavity through the drainage pump by the rotation of the drainage pump, and then the air is discharged out of the pump by the impeller, so that the air in the suction cavity is repeatedly and infinitely nearly exhausted; pumping the liquid in the external storage tank into the suction cavity through the drainage pump, and obtaining the liquid with higher pressure by the rotating impeller under the action of high-speed inertial centrifugal force, and pumping the liquid out of the pump to enter the discharge pipeline; liquid at the periphery of the impeller can enter the pressure release cavity when being discharged from the impeller to the extrusion cavity, when the pressure of the liquid exceeds the set pressure, the liquid pushes the valve core of the adjustable pressure release valve to compress the spring in the adjustable pressure release valve, and high-pressure liquid enters from the pressure release inlet and then is discharged from the pressure release outlet to enter the suction cavity; the larger the pressure is, the larger the compression of the spring in the adjustable relief valve is, the larger the opening areas of the valve core and the relief outlet of the adjustable relief valve are, the larger the flow area is, and the flow rate is increased; when the pressure of the liquid is lower than the set pressure, the spring in the adjustable pressure relief valve is reset, the valve core of the pressure relief valve body is closed, and the liquid cannot enter the pressure relief outlet through the pressure relief inlet and is discharged to the suction cavity; the strength and the pressure of the spring can be adjusted through the adjusting screw rod, so that the pressure of the valve core to the pressure relief inlet can be adjusted.
2. The working method of the drainage constant-pressure self-priming pump with the inward opening pressure relief valve body is characterized in that the drainage pump comprises a drainage pump shell, a driven gear and a driving gear which are arranged up and down are arranged in the drainage pump shell, the driven gear and the driving gear are meshed with each other, the meshed height is called meshing height, the driven gear penetrates through a transverse driven shaft, the driving gear penetrates through a transverse driving shaft, the left end and the right end of the driven shaft are arranged in a driven shaft cavity of the upper half section in the drainage pump shell through bearings, the inner diameter of the driven shaft cavity is matched with the size of the driven gear, the left end and the right end of the driving shaft are arranged in a driving shaft cavity of the lower half section in the drainage pump shell through bearings, the inner diameter of the driving shaft cavity is matched with the size of the driving gear, the right end of the driving shaft penetrates out of the drainage pump shell and is in power connection with a motor rotating shaft through a coupling shaft, and a driving shaft is arranged at the joint of the driving shaft and the coupling shaft; the drainage pump shell comprises a drainage pump shell main shell body of a right half section and a drainage pump shell end cover of a left end, the drainage pump shell end cover is fixed on the drainage pump shell main shell body through screws, the right end of the drainage pump shell is further provided with a left inlet hole, an outlet hole and a driving shaft hole, the inlet hole is communicated with a liquid inlet cavity, the height of the liquid inlet cavity is slightly higher than the meshing height and is staggered with the shaft core of a driven shaft cavity, the outlet hole is communicated with a liquid outlet cavity, the height of the liquid outlet cavity is slightly lower than the meshing height and is staggered with the shaft core of the driving shaft cavity, a vertical axis plane is formed between the axis of the driven shaft and the axis of the driving shaft, the inlet hole and the outlet hole are respectively located on the front side and the rear side of the axis plane, the driving shaft hole and the driving shaft are concentrically arranged, a drainage pump inlet pipeline is connected with the inlet hole, and a drainage pump outlet pipeline is connected with the outlet hole.
3. The method of operating a constant pressure self priming pump of the type having an inward opening pressure relief valve of claim 1, wherein said pump body and motor are mounted together on a pump mount.
4. The working method of the drainage type constant-pressure self-priming pump with the inward opening pressure relief valve body is characterized in that a defoamer is arranged at an extrusion cavity right below a pump outlet, and a buffer cavity is arranged right below the defoamer.
5. The working method of the drainage type constant-pressure self-priming pump with the inward opening pressure relief valve body is characterized in that a liquid adding hole is further formed in a pump shell at the top of the extrusion cavity, the liquid adding hole is located at the upper left side of the extrusion cavity, and a liquid adding hole bolt is arranged at the liquid adding hole.
6. The working method of the drainage type constant-pressure self-priming pump with the inward opening pressure relief valve body is characterized in that a liquid discharge port is formed in a pump housing at the left end of the pressure relief cavity, and a liquid discharge port bolt is arranged at the liquid discharge port.
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| CN202111671432.1A CN114294242B (en) | 2021-12-31 | 2021-12-31 | Working method of drainage type constant-pressure self-priming pump with internal opening pressure relief valve body |
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| CN114294242B true CN114294242B (en) | 2023-06-06 |
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| CN117366021B (en) * | 2023-11-20 | 2024-03-26 | 东营市胜凯石化设备有限公司 | Energy-saving circulating water pump for recycling waste steam from petroleum refining |
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| CN114294242A (en) | 2022-04-08 |
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