CN217926347U - Parallel pump pumping system - Google Patents
Parallel pump pumping system Download PDFInfo
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- CN217926347U CN217926347U CN202222167662.0U CN202222167662U CN217926347U CN 217926347 U CN217926347 U CN 217926347U CN 202222167662 U CN202222167662 U CN 202222167662U CN 217926347 U CN217926347 U CN 217926347U
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Abstract
The utility model discloses a parallelly connected pump pumping system, include: a double-shaft motor; the centrifugal pumps are oppositely arranged at two ends of the double-shaft motor and are respectively connected to two output shafts of the double-shaft motor; the water inlet of the centrifugal pump is connected with a water inlet branch pipe respectively, the water outlet of the centrifugal pump is connected with a water outlet branch pipe respectively, the water outlet branch pipe is connected to a water outlet main pipe through a three-way pipe, the water inlet branch pipe is provided with a first control valve respectively, and the water outlet main pipe is provided with a second control valve. The pumping system adopts two centrifugal pumps with the same structure, the two centrifugal pumps are driven by one double-shaft motor at the same time, and the two centrifugal pumps run at the same speed, so that the high-efficiency and stable running of the pumping system can be ensured, and the pumping efficiency and the reliability of the pumping system are improved.
Description
Technical Field
The utility model belongs to the technical field of the centrifugal pump, concretely relates to parallelly connected pump pumping system.
Background
The parallel pump set has wide application range in industry, relates to important industries such as municipal administration, chemical industry, building, electric power, agriculture and the like, has wider flow range and higher stability and redundancy capability, and is widely applied to scenes with wide flow demand change range. Meanwhile, the parallel pump system can adjust the flow rate on the premise of not losing the efficiency, and is not possessed by a series system and a single-pump operation system. However, how to adjust the working state between the parallel pump sets, ensure the stable working state between the pumps, give full play to the working efficiency of the parallel pump sets, and ensure the safety and reliability of the operation of the pump sets is an important research direction of the parallel pump sets.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a parallelly connected pump pumping system when realizing improving pumping system pumping efficiency, improves the reliability of pumping system operation.
The utility model discloses a following technical scheme realizes:
a parallel pump pumping system comprising:
a double-shaft motor;
the centrifugal pumps are oppositely arranged at two ends of the double-shaft motor and are respectively connected to two output shafts of the double-shaft motor;
the water inlet of the centrifugal pump is connected with a water inlet branch pipe respectively, the water outlet of the centrifugal pump is connected with a water outlet branch pipe respectively, the water outlet branch pipe is connected to a water outlet main pipe through a three-way pipe, the water inlet branch pipe is provided with a first control valve respectively, and the water outlet main pipe is provided with a second control valve.
As a further improvement of the above technical scheme, the positions of the water inlet branch pipe close to the water inlet of the centrifugal pump are respectively provided with a first pressure detection unit, and the positions of the water outlet branch pipe close to the water outlet of the centrifugal pump are respectively provided with a second pressure detection unit;
and a third pressure detection unit and a fourth pressure detection unit are respectively arranged on two sides of the second control valve on the water outlet main pipe, the first pressure detection unit, the second pressure detection unit, the third pressure detection unit and the fourth pressure detection unit are respectively connected to a controller, and the controller is connected with the second control valve.
As a further improvement of the technical scheme, a flowmeter is arranged on the water outlet main pipe.
As a further improvement of the technical scheme, the controller is connected with a double-shaft motor, and the double-shaft motor is a variable frequency motor.
As a further improvement of the above technical solution, the centrifugal pump includes a pump casing, an inlet-type ring, and an impeller;
a first cavity is arranged in the pump shell, and a working part which horizontally extends out is arranged at one end of the pump shell, which is opposite to the first cavity, so that an opening structure communicated with the first cavity is formed at one end of the pump shell;
the inlet type ring comprises an installation part matched with the working part, the installation part extends into the working part and is connected with the working part in a sliding fit manner, a second cavity is arranged at one end part of the installation part, the second cavity is arranged opposite to the first cavity to form a closed cavity matched with the impeller, a water inlet part is arranged at the other end of the installation part, and a water inlet channel communicated with the second cavity is arranged in the water inlet part;
the impeller is arranged in a closed cavity formed between the pump shell and the inlet ring, and the impeller is fixedly connected to an output shaft of the centrifugal pump.
As a further improvement of the technical scheme, a fixed sleeve is arranged on one side of the pump shell opposite to the inlet ring, one end of the fixed sleeve is fixedly connected with the pump shell, and the other end of the fixed sleeve is fixedly connected with the double-shaft motor.
As a further improvement of the above technical solution, the impeller includes an impeller disk, one side of the impeller disk facing the inside of the impeller is provided with a flow guide surface, the impeller disk is connected to the output shaft through a fixing screw, and a screw head of the fixing screw is provided with a spherical surface matched with the flow guide surface to form an arc surface with continuous transition with the flow guide surface.
As a further improvement of the technical scheme, gear meshing structures are respectively arranged between the other end of the impeller disc and the output shaft, and the impeller disc and the output shaft are connected in a matched mode through the gear meshing structures.
As a further improvement of the technical scheme, one end of the working part of the pump shell is provided with a first flange, one end of the installation part of the inlet-shaped ring is provided with a second flange, and the pump shell and the inlet-shaped ring are fixedly connected through the first flange and the second flange.
As a further improvement of the technical scheme, an impeller mounting part is arranged in the first cavity on the pump shell and matched with one end face of the impeller disc, and a sealing ring is arranged between the impeller mounting part and the impeller disc.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1) The pumping system adopts two centrifugal pumps with the same structure, the two centrifugal pumps are driven by one double-shaft motor at the same time, and the two centrifugal pumps run at the same speed, so that the high-efficiency and stable running of the pumping system can be ensured, and the pumping efficiency and the reliability of the pumping system are improved.
2) The pumping system monitors the inlet and outlet pressure of the centrifugal pump and the rotating speed of the double-shaft motor to realize the monitoring of the operation condition of the pumping system, adjusts the operation parameters of the double-shaft motor through the controller, and controls the opening size of the second control valve by combining the pressure data of the inlet and outlet of the second control valve to adjust the pumping system to the optimal working condition state, thereby ensuring the efficient operation of the pumping system.
3) The centrifugal pump adopted in the pumping system is simple in structure and good in overall reliability, the impeller in the centrifugal pump is convenient to install and maintain, when the centrifugal pump is out of order in the operation process, for example, the impeller is damaged to a certain degree, the operation state of the centrifugal pump can be quickly adjusted by fine adjustment of the size of the closed chamber, and the operation efficiency of the pumping system is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive efforts.
Fig. 1 is a schematic structural view of an embodiment of the parallel pump pumping system of the present invention.
Fig. 2 is the structural schematic diagram of the centrifugal pump in the parallel pump pumping system of the utility model.
Fig. 3 is a schematic diagram of a pump casing structure of a centrifugal pump in the parallel pump pumping system of the present invention.
Fig. 4 is a left side view of the pump casing structure of the centrifugal pump in the parallel pump pumping system of the present invention.
Fig. 5 is an inlet-type ring structure diagram of a centrifugal pump in a parallel pump pumping system of the present invention.
Fig. 6 is a partial schematic view of fig. 2 at a.
Wherein: 10. a double-shaft motor 101 and an output shaft;
20. a centrifugal pump;
21. a pump housing 210, a first chamber 211, a working portion 212, an impeller mounting portion 213, and a first flange;
22. an inlet-type ring, 220, a mounting part, 221, a second chamber, 222, a water inlet part, 223, a water inlet passage, 224, and a second flange;
23. the impeller comprises an impeller 230, an impeller disc 231, a flow guide surface 232, a fixing screw 233, a screw head 234, a gear meshing structure 235 and a sealing ring;
24. fixing a sleeve;
30. the sealing assembly 301, the dynamic sealing seat 302, the dynamic seal 303, the static sealing seat 304, the static seal 305, the thrust assembly 306, the fixing piece 307, the elastic sleeve 308, the locking piece 309, the locking screw 310, the limiting groove 311 and the limiting plate;
401. the system comprises a water inlet branch pipe 402, a water outlet branch pipe 403, a water outlet main pipe 404, a first control valve 405, a second control valve 406, a first pressure detection unit 407, a second pressure detection unit 408, a third pressure detection unit 409, a fourth pressure detection unit 410 and a flowmeter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
Referring to fig. 1, the parallel pump pumping system in this embodiment includes a dual-shaft motor 10, two sets of centrifugal pumps 20 having the same structure are oppositely disposed at two ends of the dual-shaft motor 10, the two sets of centrifugal pumps 20 are respectively connected to two output shafts 101 of the dual-shaft motor, and the dual-shaft motor drives the two sets of centrifugal pumps simultaneously; the double-shaft motor 10 adopts a variable frequency motor, and can conveniently adjust and control the operation condition of the pumping system.
The water inlet of the centrifugal pump 20 is connected with a water inlet branch pipe 401, the water outlet of the centrifugal pump 20 is connected with a water outlet branch pipe 403, the water outlet branch pipe 402 is connected to a water outlet main pipe 403 through a three-way pipe, the water inlet branch pipe 401 is provided with a first control valve 404, the water outlet main pipe 403 is provided with a second control valve 405, and the second control valve 405 can be a pneumatic gate valve so as to adjust and control the flow of the water outlet main pipe conveniently.
The pumping system adopts two centrifugal pumps with the same structure, the two centrifugal pumps are driven by a double-shaft motor and run at constant speed, and the high-efficiency and stable running of the parallel pump pumping system is ensured.
The water inlet branch pipe 401 is provided with a first pressure detection unit 406 at a position close to the water inlet of the centrifugal pump, the water outlet branch pipe 402 is provided with a second pressure detection unit 407 at a position close to the water outlet of the centrifugal pump, the first pressure detection unit and the second pressure detection unit are respectively provided with a commercially available pressure sensor and are respectively used for detecting pressure value data of the two groups of centrifugal pumps at the water inlet and the water outlet, and the operation conditions of the centrifugal pumps are monitored. A third pressure detection unit 408 and a fourth pressure detection unit 409 are respectively arranged on the water outlet main pipe 403 and positioned on two sides of the second control valve 405, and similarly, commercially available pressure sensors are respectively adopted by the third pressure detection unit and the fourth pressure detection unit and are respectively used for detecting the pressure values of the water inlet end and the water outlet end of the second control valve so as to monitor the conveying condition in the pumping system.
The first pressure detection unit 406, the second pressure detection unit 407, the third pressure detection unit 408 and the fourth pressure detection unit 409 are respectively connected with the controller, so that the controller can acquire pressure data in the pumping system in real time, the controller is respectively connected with the second control valve 405 and the double-shaft motor 10, and when the operation data of the double-shaft motor is acquired, the operation condition of the pumping system is adjusted by controlling the rotating speed of the double-shaft motor and the opening degree of the second control valve, so that the pumping system is adjusted to an optimal condition state, and the efficient operation of the pumping system is ensured. The pumping flow of the centrifugal pump is obtained by obtaining the pressure values of the water inlets and the water outlets of the two groups of centrifugal pumps and the rotating speed of the double-shaft motor, and is fed back to the controller; and obtaining the operating condition of the pumping system according to the characteristic curve of the centrifugal pump, wherein the control unit adopts a PLC (programmable logic controller), and outputs a control command to adjust the second control valve and the double-shaft motor through an upper computer or the PLC so as to adjust the pumping system to the optimal operating condition.
A flow meter 410 is arranged on the water outlet main pipe 403 and used for detecting the pumping flow of the pumping system, and the flow meter is connected to the controller and feeds back a detected flow signal to the controller.
Referring to fig. 2 to 5, the centrifugal pump 20 in the present embodiment includes a pump casing 21, an inlet ring 22, and an impeller 23.
The pump casing 21 is provided with a first chamber 210 therein, and one end of the pump casing opposite to the first chamber is provided with a working part 211 which horizontally extends out, so that one end of the pump casing forms an opening structure communicated with the first chamber.
The impeller 23 is disposed in the closed chamber formed between the pump casing and the inlet ring, and the impeller 23 is fixedly attached to the output shaft 101 of the centrifugal pump.
During installation, a pump shell is arranged on an output shaft of the centrifugal pump, an impeller is installed in the pump shell and fixedly connected to the output shaft, and an inlet-type ring is installed in the pump shell in a matched mode; one end of the pump shell is of an open structure, so that the impeller in the pump shell can be conveniently mounted and dismounted. Meanwhile, the first cavity and the second cavity are respectively arranged on the pump shell and the inlet type ring, so that the volute structure in the centrifugal pump can be conveniently machined and formed, and the pump shell and the inlet type ring can be more conveniently machined.
As an alternative embodiment, a fixing sleeve 24 is disposed on the opposite side of the pump casing to the inlet-type ring, one end of the fixing sleeve 24 is fixedly connected to the pump casing 21, and the other end is fixedly connected to the dual-shaft motor 10, so as to fixedly connect the centrifugal pump to the dual-shaft motor, thereby ensuring stable operation of the parallel pumps.
As another alternative, the impeller 23 includes an impeller disk 230 and vanes disposed on the impeller disk, a flow guiding surface 231 is disposed on one side of the impeller disk 230 facing the inside of the impeller, the impeller disk 230 is connected to the output shaft 101 by a fixing screw 232, and a screw head 233 of the fixing screw 232 is disposed as a spherical surface matching with the flow guiding surface, and forms an arc surface with continuous transition with the flow guiding surface. The impeller is fixedly mounted on the output shaft by directly adopting a fixing screw in cooperation with an impeller mounting part structure on the pump shell; the fixing screw adopts the inner hexagon screw, the screw head of the inner hexagon screw is processed into the spherical surface matched with the flow guide surface, and the continuous transition arc-shaped surface is formed between the fixing screw and the flow guide surface, so that a flow guide cover does not need to be additionally arranged in the impeller, the integral structure of the centrifugal pump is simpler, and the centrifugal pump has better reliability.
In order to form stable transmission connection while the impeller and the output shaft are fixedly connected, a gear meshing structure 234 is respectively arranged between one end of the impeller disc 230 connected with the output shaft and the output shaft 101, and the two are in matched connection through the gear meshing structure, so that the impeller and the output shaft form stable transmission, and meanwhile, the impeller is more conveniently installed on the output shaft.
As another alternative embodiment, the working portion 211 of the pump housing 21 has a first flange 213 at one end thereof, the mounting portion 220 of the inlet-type ring 22 has a second flange 224 at one end thereof, and the pump housing and the inlet-type ring are fixedly connected by the first flange and the second flange. When the inlet type ring is assembled with the pump shell, the sliding fit structure between the working part and the installation part is installed in a matched mode in the radial direction, the inlet type ring and the pump shell are installed in a positioned mode in the horizontal direction through the matching of the first flange and the second flange, accurate matched installation is formed between the inlet type ring and the pump shell, and the accuracy of an impeller installation cavity formed between the inlet type ring and the pump shell is guaranteed. Meanwhile, the sliding fit structure between the working part and the mounting part can adjust the size of the impeller mounting cavity through the adjustment of the working part and the mounting part in the horizontal direction, and when the centrifugal pump is subjected to cavitation or impeller damage, the running condition of the centrifugal pump can be improved through the adjustment of the size of the impeller mounting cavity, and the working condition flow of the centrifugal pump can be adjusted.
As another alternative, an impeller mounting portion 212 is disposed in the first chamber of the pump casing 21, the impeller mounting portion 212 is matched with an end face of the impeller disk 230, and a sealing ring 235 is disposed between the pump casing and the impeller disk at the impeller mounting portion, so as to form stable mounting of the impeller and good sealing of the centrifugal pump, and ensure stable operation of the centrifugal pump.
As another alternative, a sealing assembly 30 is provided between the pump housing 21 and the output shaft 101 for forming a good seal therebetween.
Specifically, as shown in fig. 6, the sealing assembly 30 in this embodiment includes a dynamic sealing seat 301 sleeved on the output shaft, a dynamic sealing installation portion is disposed at an end portion of one end of the dynamic sealing seat 301, a dynamic seal 302 is disposed in the dynamic sealing installation portion, a static sealing seat 303 is sleeved on the dynamic sealing seat 301, a static sealing installation portion is disposed on the static sealing seat 303, a static seal 304 is disposed in the static sealing installation portion, a thrust assembly 305 is disposed between the static seal 304 and the static sealing seat 303, the thrust assembly 305 applies a horizontal acting force to the static seal, so that a sealing fit is formed between the static seal and the dynamic seal, the static sealing seat is fixed to the pump casing, and a fixing assembly is disposed at the other end of the dynamic sealing seat 301 and is used for fixedly connecting the dynamic sealing seat to the output shaft.
The fixing assembly comprises a fixing piece 306 sleeved on the movable sealing seat, one end of the fixing piece 306 is provided with an elastic sleeve 307 matched with the fixing seat, the elastic sleeve 307 is a wedge-shaped cross section, a locking piece 308 is sleeved on the elastic sleeve 307, a locking surface is arranged on the locking piece 308 and is a conical surface matched with the elastic sleeve, and the locking piece 308 is fixedly connected with the fixing piece 306 through a locking bolt 309.
The dynamic seal seat 301 is provided with a limiting groove 310, a limiting plate 311 is arranged in the limiting groove 310, one end of the limiting plate 311 is clamped in the limiting groove 310 and forms limiting fit with the end face of the static seal seat, and the limiting plate 311 is fixedly connected with the static seal seat 303 to limit and install the static seal seat.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, which are used herein, refer to the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the product of the present invention is usually placed when in use, and are only used for convenience of description, and are not intended to indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be broadly construed, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.
Claims (10)
1. A parallel pump pumping system, comprising:
a double-shaft motor;
the centrifugal pumps are oppositely arranged at two ends of the double-shaft motor and are respectively connected to two output shafts of the double-shaft motor;
the centrifugal pump is characterized in that a water inlet of the centrifugal pump is connected with a water inlet branch pipe respectively, a water outlet of the centrifugal pump is connected with a water outlet branch pipe respectively, the water outlet branch pipes are connected to a water outlet main pipe through three-way pipes, first control valves are arranged on the water inlet branch pipes respectively, and a second control valve is arranged on the water outlet main pipe.
2. The parallel pump pumping system of claim 1, wherein the inlet branch pipes are respectively provided with a first pressure detection unit at a position close to a water inlet of the centrifugal pump, and the outlet branch pipes are respectively provided with a second pressure detection unit at a position close to a water outlet of the centrifugal pump;
and a third pressure detection unit and a fourth pressure detection unit are respectively arranged on two sides of the second control valve on the water outlet main pipe, the first pressure detection unit, the second pressure detection unit, the third pressure detection unit and the fourth pressure detection unit are respectively connected to a controller, and the controller is connected with the second control valve.
3. The parallel pump pumping system of claim 2, wherein a flow meter is disposed on the outlet manifold.
4. The parallel pump pumping system of claim 2, wherein the controller is coupled to a dual-shaft motor, the dual-shaft motor being a variable frequency motor.
5. The parallel pump pumping system of claim 1 or 2, wherein the centrifugal pump comprises a pump casing, an inlet swage ring, and an impeller;
a first cavity is arranged in the pump shell, and a working part horizontally extending out is arranged at one end of the pump shell opposite to the first cavity, so that an opening structure communicated with the first cavity is formed at one end of the pump shell;
the inlet type ring comprises an installation part matched with the working part, the installation part extends into the working part and is connected with the working part in a sliding fit manner, a second cavity is arranged at one end part of the installation part, the second cavity is arranged opposite to the first cavity to form a closed cavity matched with the impeller, a water inlet part is arranged at the other end of the installation part, and a water inlet channel communicated with the second cavity is arranged in the water inlet part;
the impeller is arranged in a closed cavity formed between the pump shell and the inlet ring, and the impeller is fixedly connected to an output shaft of the centrifugal pump.
6. The parallel pump pumping system of claim 5, wherein a retaining sleeve is disposed on the pump housing on a side opposite the inlet ring, the retaining sleeve having one end fixedly attached to the pump housing and the other end fixedly attached to the dual shaft motor.
7. The parallel pump pumping system of claim 5, wherein the impeller comprises an impeller disk, a flow guide surface is arranged on one side of the impeller disk facing the inside of the impeller, the impeller disk is connected to the output shaft through a fixing screw, and a screw head of the fixing screw is arranged to be a spherical surface matched with the flow guide surface and forms an arc-shaped surface with continuous transition with the flow guide surface.
8. The parallel pump pumping system of claim 7, wherein the impeller discs are each provided with a gear engagement structure between the other end and the output shaft, and the two are cooperatively connected by the gear engagement structure.
9. The parallel pump pumping system of claim 5, wherein a first flange is provided at one end of the working portion of the pump housing, a second flange is provided at one end of the mounting portion of the inlet-type ring, and the pump housing and the inlet-type ring are fixedly connected by the first flange and the second flange.
10. The parallel pump pumping system of claim 5, wherein an impeller mounting portion is disposed on the pump housing in the first chamber, the impeller mounting portion is engaged with an end surface of the impeller disc, and a seal ring is disposed between the pump housing and the impeller disc in the impeller mounting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222167662.0U CN217926347U (en) | 2022-08-17 | 2022-08-17 | Parallel pump pumping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222167662.0U CN217926347U (en) | 2022-08-17 | 2022-08-17 | Parallel pump pumping system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217926347U true CN217926347U (en) | 2022-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222167662.0U Active CN217926347U (en) | 2022-08-17 | 2022-08-17 | Parallel pump pumping system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217926347U (en) |
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2022
- 2022-08-17 CN CN202222167662.0U patent/CN217926347U/en active Active
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