CN217761350U

CN217761350U - Auxiliary mechanism for judging and detecting rotation direction of multistage centrifugal pump

Info

Publication number: CN217761350U
Application number: CN202221813016.0U
Authority: CN
Inventors: 周亮; 马成
Original assignee: Sichuan Chuangtiancheng Electromechanical Engineering Technology Co ltd
Current assignee: Sichuan Chuangtiancheng Electromechanical Engineering Technology Co ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-11-08
Anticipated expiration: 2032-07-13

Abstract

The utility model relates to a multistage centrifugal pump technical field discloses a multistage centrifugal pump is revolved to judgement and is detected complementary unit, including the shaft coupling that is used for connecting multistage centrifugal pump's main shaft and alternating current motor output shaft, still including set up in multistage centrifugal pump tip encloses the flange mechanism who closes outside the shaft coupling, along two at least magnets of circumference fixed being equipped with on the shaft coupling, flange mechanism go up install with the hall element of magnet one-to-one. This application sets up magnet and hall element at multistage centrifugal pump's main shaft and the junction of the AC motor output shaft for it provides power, utilizes fixed hall element and the direction of rotation who judges multistage centrifugal pump with the synchronous pivoted magnet of main shaft, realizes the conversion of the information of main shaft direction of rotation to the signal of telecommunication to can stride across distance transmission information, improve wiring work efficiency.

Description

Auxiliary mechanism for judging and detecting rotation direction of multistage centrifugal pump

Technical Field

The application relates to the technical field of multistage centrifugal pumps, in particular to a rotation direction judgment and detection auxiliary mechanism of a multistage centrifugal pump.

Background

The multistage centrifugal pump is characterized in that more than two centrifugal pumps with the same function are integrated together, and the fluid channel structure is represented in that a medium pressure relief opening of a first stage is communicated with an inlet of a second stage, and a medium pressure relief opening of the second stage is communicated with an inlet of a third stage, so that the multistage centrifugal pump is formed by a mechanism connected in series. Due to the structural limitation, when the multistage centrifugal pump works, the main shaft rotates towards different directions to show greatly different working efficiency, therefore, the multistage centrifugal pump needs to be ensured to turn correctly in the use process, the turning direction of the main shaft of the multistage centrifugal pump is consistent with the turning direction of an output shaft of an alternating current motor for providing power for the multistage centrifugal pump, the forward rotation or the reverse rotation of the output shaft of the alternating current motor depends on the wiring mode, therefore, in the early-stage wiring work, two workers are needed, one worker connects and starts the multistage centrifugal pump, the other worker observes the turning direction of the main shaft of the multistage centrifugal pump and feeds back the turning direction to a wiring worker, and the wiring is timely adjusted when the turning direction is incorrect, so that the working mode causes a lot of inconvenience and influences the working efficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the inconvenient problem of multistage centrifugal pump wiring operation that prior art exists, the application provides a multistage centrifugal pump and revolves to judging detection complementary unit.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

the utility model provides a multistage centrifugal pump is to judging detection complementary unit soon, is including the shaft coupling that is used for connecting multistage centrifugal pump's main shaft and alternating current motor output shaft, still including set up in multistage centrifugal pump tip closes the flange mechanism outside the shaft coupling, along the fixed two at least magnets that are equipped with of circumference on the shaft coupling, install in the flange mechanism with the hall element of magnet one-to-one.

Most of the existing multistage centrifugal pumps are in transmission connection with an alternating current motor by directly utilizing a coupler, the steering of a main shaft in the multistage centrifugal pump is directly related to the steering of an output shaft of the alternating current motor, and the steering of the output shaft of the alternating current motor depends on the wiring mode of the output shaft of the alternating current motor at a control cabinet. In the use scene of the centrifugal pump, a control cabinet for controlling the starting and stopping of the centrifugal pump is far away from the actual installation position of the centrifugal pump, and in the wiring work before the centrifugal pump is started, because the rotating direction of the multistage centrifugal pump in the use process is required to be ensured to be correct, one person needs to start after wiring at the control cabinet, the other person observes the rotating direction of equipment after starting beside the centrifugal pump, and if the rotating direction is incorrect, the centrifugal pump needs to cut the line again and start. The Hall sensor is used for detecting the rotating direction of the rotating shaft, and therefore, the scheme arranges the magnet, the Hall element and other components at the joint between the multistage centrifugal pump and the alternating current motor, and determines whether the wiring between the alternating current motor and an external circuit is correct or not by detecting the rotating direction of the main shaft of the multistage centrifugal pump.

According to the scheme, the magnet and the Hall element are arranged at the connecting position between the multistage centrifugal pump and the alternating current motor, compared with the mode that the sensor is directly arranged in the multistage centrifugal pump, although the related structure is changed more, the interference to the working of the multistage centrifugal pump and the influence on the precision of the sensor are minimum. In the scheme, the flange mechanism is arranged outside the coupler, on one hand, the most ideal installation position is provided for the Hall element, the matching precision of the Hall element and the magnet is improved, and therefore the detection precision of the rotating direction is guaranteed, and on the other hand, the protection effect on the coupler and the Hall element is achieved.

Further, the shaft coupling includes the first connecting piece with main shaft fixed connection, with alternating current motor output shaft fixed connection's second connecting piece, and set up in bolster between first connecting piece and the second connecting piece, magnet fixed mounting is in first connecting piece.

Furthermore, the flange mechanism is composed of two mutually connected flange plates, and the Hall element is embedded in the end faces of the flange plates; the end face of the flange plate is also provided with a wire arranging groove which is flush with the lowest position of the Hall element, and the wire arranging groove comprises an annular part which is concentrically arranged with the flange plate and a linear extending part which is used for communicating the annular part with the flange plate.

Furthermore, a plurality of wire fixing parts in an annular array are arranged in the annular part of the wire arranging groove at intervals, and the wire fixing parts are in a curved shape with an inner arc surface facing the surface of the wire arranging groove.

Furthermore, the device also comprises a calculating unit connected with the Hall element and a data transmission unit for transmitting the calculation result of the calculating unit to external terminal equipment.

The beneficial effect of this application is: this application sets up magnet and hall element at multistage centrifugal pump's main shaft and the junction of the AC motor output shaft for it provides power, utilizes fixed hall element and the direction of rotation who judges multistage centrifugal pump with the synchronous pivoted magnet of main shaft, realizes the conversion of the information of main shaft direction of rotation to the signal of telecommunication to can stride across distance transmission information, improve wiring work efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a perspective view of the present application;

FIG. 2 is a schematic view of the internal structure of the flange mechanism of the present application;

FIG. 3 is an exploded view of the coupling of the present application;

FIG. 4 is a schematic view of the flange plate and first connecting member of the present application;

FIG. 5 is an enlarged partial schematic view at A of FIG. 4;

fig. 6 is an elevation view of the end face of the flange in the present application.

In the figure: 1-a multistage centrifugal pump; 2-a flange plate; 3-a main shaft; 4-a coupler; 401 — a first connector; 402-a buffer; 403-a second connector; 5-an output shaft of an alternating current motor; 6-a Hall element; 7-a magnet; 8-wire fixing part.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhang, 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 application, it should also be noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; 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 application can be understood in a specific case by those of ordinary skill in the art.

Example 1:

as shown in fig. 1 and fig. 2, the auxiliary mechanism for judging and detecting the rotation direction of the multistage centrifugal pump comprises a shaft coupling 4 for connecting a main shaft 3 of the multistage centrifugal pump 1 and an output shaft 5 of an alternating current motor, and further comprises a flange mechanism arranged at the end part of the multistage centrifugal pump 1 and surrounding the shaft coupling 4, at least two magnets 7 are fixedly arranged on the shaft coupling 4 along the circumferential direction, and hall elements 6 in one-to-one correspondence with the magnets 7 are arranged on the flange mechanism.

The working principle is as follows:

the connection structure in this application sets up the transmission between multistage centrifugal pump 1 and the AC motor who provides power for it, and shaft coupling 4 makes both keep synchronous rotating's structure for connecting 3 AC motor output shafts 5 of main shaft of multistage centrifugal pump 1 simultaneously, and shaft coupling 4 itself also rotates synchronously thereupon. The flange mechanism is a structure which is enclosed outside the coupler 4 and is always kept fixed, the magnet 7 is arranged on the coupler 4 and keeps rotating along with the coupler, and the Hall element 6 which is arranged corresponding to the magnet 7 is arranged on the flange mechanism and keeps a fixed state. In this

application hall element

6 and 7 one-to-one of magnet include the correspondence of aspects such as quantity and phase place, according to the technique that current hall sensor detected the rotation, in order to realize the detection of rotation, need set up at least two sets of hall sensor, and a set of is used for measuring the rotational speed, and another group is used for measuring to turn to. The Hall sensors for measuring the rotating speed are triggered by rising edges, when the triggering of the rotating speed sensors is interrupted, the potential of the steering sensors is checked, and if the steering sensors are at the low potential, the potential is determined to be clockwise according to the phase difference condition of the two groups of actual Hall sensors; if the rotating speed sensor is triggered and interrupted, the steering sensor is at a high potential, and the two groups of Hall sensors are arranged in the counterclockwise direction. As fig. 6 provides an example of a structure in which three groups of hall sensors are provided, the order in which the three hall elements 6 output sensing signals can also be used to determine the steering of the coupling 4.

It is worth to be noted that, the present embodiment utilizes the existing hall sensor, and provides a scheme that the rotation direction of the main shaft is converted into an electrical signal by using the cooperation of the magnet and the hall element, and the information of the rotation direction of the multistage centrifugal pump can be transmitted across the distance by performing visual processing on the electrical signal, so that the observation work of the operator is replaced, and the correct wiring of the wiring personnel at the wiring position of the control cabinet is facilitated. It should be noted that the visualization processing of the detection result of the hall sensor is a technical solution that can be implemented by those skilled in the art using the prior art, and therefore, the present application is not limited to this, for example, the hall element 6 in the present application is connected to a controller such as a single chip, the controller is connected to a power supply, and meanwhile, an output end of the controller is connected to a buzzer, a voice broadcasting module or a display screen, so that the potential information or the main shaft rotation direction information of the hall element is output through media such as sound or images.

In addition, this application also can regard as detachable complementary unit in using to through continuous dismantlement installation, make this application can install and utilize before the wiring, dismantle after the wiring is accomplished and be used for other multistage centrifugal pump departments of treating the wiring. Specifically, in the installation of current multistage centrifugal pump, the shaft coupling exposes outside mostly, but magnet direct magnetism in this application is inhaled and is fixed in the shaft coupling surface, then installation flange mechanism and AC motor wiring again, dismantles flange mechanism and magnet again behind the definite wiring mode.

Example 2:

this example is further optimized and defined based on example 1.

As shown in fig. 3, the coupling 4 includes a first connecting member 401 fixedly connected to the main shaft 3, a second connecting member 403 fixedly connected to the output shaft 5 of the ac motor, and a buffer member 402 disposed between the first connecting member 401 and the second connecting member 403, and the magnet 7 is fixedly mounted to the first connecting member 401. The flange mechanism is composed of two mutually connected flange plates 2, and the Hall element 6 is embedded in and installed on the end faces of the flange plates 2; the end face of the flange plate 2 is also provided with a wire arranging groove which is flush with the lowest position of the Hall element 6, and the wire arranging groove comprises an annular part which is concentrically arranged with the flange plate 2 and a linear extending part which is communicated with the annular part and the flange plate 2.

The coupling 4 in this embodiment is similar to the existing coupling 4 in structure, and has a first connecting member 401 and a second connecting member 403 which are respectively connected to the main shaft 3 of the multistage centrifugal pump 1 and the output shaft 5 of the ac motor, and are connected to each other, and a buffer member 402 is provided in the middle. Compared with the second connecting piece 403, the rotating speeds of the first connecting piece 401 and the main shaft 3 of the multistage centrifugal pump 1 are completely the same and have no deviation, and the magnet 7 fixed on the first connecting piece 401 can ensure the matching of the rotating heights of the first connecting piece and the main shaft 3 of the multistage centrifugal pump 1, so that the error is reduced. It should be noted that the magnet 7 is preferably fixed to the first connecting member 401 by means of an embedded fixing method that is slotted on the circumferential surface of the first connecting member 401, so as to improve the stability of the magnet 7. As shown in fig. 5, the hall element 6 is embedded and mounted on the end face of the flange 2, in order to make the hall element 6 correspond to the magnet 7, the hall element 6 should be mounted along the inner wall of the flange 2, and the wire arranging groove is used for accommodating the connecting wire of the hall element 6 and the external circuit, thereby ensuring the sealing property after the two flanges 2 are matched.

Further, in the present embodiment, in order to fix the connection line and keep the connection line neat when the hall element 6 is installed, as shown in fig. 4-5, a plurality of line fixing portions 8 in an annular array are arranged at intervals in the annular portion of the line arranging groove, and the line fixing portions 8 are in a curved shape with an inner arc surface facing the surface of the line arranging groove.

Example 3:

in this embodiment, further optimization and limitation are performed on the basis of embodiment 1.

The embodiment provides a technical scheme for visualizing the detection result of the sensor, that is, the present application further includes a calculation unit connected to the hall element 6, and a data transmission unit for transmitting the calculation result of the calculation unit to an external terminal device. In this embodiment, the data processing and the information transmission of the data transmission unit may be performed by the calculation unit, and finally, the rotation direction information of the multistage centrifugal pump 1 is directly presented at the terminal device. The data transmission unit can transmit data in a wired or wireless mode, and the terminal equipment can also be image display equipment, sound output equipment or equipment held by a wiring worker. It should be noted that, when only two hall elements 6 are provided, the hall elements 6 in the present application can also be directly connected to components such as a bulb that can visualize the level of the sensor potential, and the worker can also indirectly know the rotation direction of the multistage centrifugal pump 1 through this information.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a multistage centrifugal pump is revolved to judgement and is detected complementary unit, includes shaft coupling (4) that are used for connecting main shaft (3) and alternating current motor output shaft (5) of multistage centrifugal pump (1), its characterized in that: still including set up in multistage centrifugal pump (1) tip and enclose the flange mechanism of closing outside shaft coupling (4), fixed two at least magnet (7) of being equipped with along circumference on shaft coupling (4), install on the flange mechanism with hall element (6) of magnet (7) one-to-one.

2. The turning direction judging and detecting auxiliary mechanism of the multistage centrifugal pump according to claim 1, characterized in that: the coupler (4) comprises a first connecting piece (401) fixedly connected with the main shaft (3), a second connecting piece (403) fixedly connected with the output shaft (5) of the alternating current motor, and a buffer piece (402) arranged between the first connecting piece (401) and the second connecting piece (403), and the magnet (7) is fixedly installed on the first connecting piece (401).

3. The turning direction judging and detecting auxiliary mechanism of the multistage centrifugal pump according to claim 2, characterized in that: the flange mechanism is composed of two mutually connected flange plates (2), and the Hall element (6) is embedded in and mounted on the end faces of the flange plates (2); the end face of the flange plate (2) is also provided with a wire arranging groove which is flush with the lowest position of the Hall element (6), and the wire arranging groove comprises an annular part which is concentrically arranged with the flange plate (2) and a linear extending part which is communicated with the annular part and the flange plate (2) externally.

4. The turning direction judging and detecting auxiliary mechanism of the multistage centrifugal pump according to claim 3, characterized in that: a plurality of wire fixing parts (8) in an annular array are arranged in the annular part of the wire arranging groove at intervals, and the wire fixing parts (8) are in a bent shape with an inner arc surface facing the surface of the wire arranging groove.

5. The turning direction judging and detecting auxiliary mechanism of the multistage centrifugal pump according to claim 1, characterized in that: the device also comprises a calculation unit connected with the Hall element (6) and a data transmission unit for transmitting the calculation result of the calculation unit to external terminal equipment.