CN219220697U

CN219220697U - Well pump device

Info

Publication number: CN219220697U
Application number: CN202120514642.9U
Authority: CN
Inventors: 金程远
Original assignee: Jinhua Beite Pump Industry Co ltd
Current assignee: Jinhua Beite Pump Industry Co ltd
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2023-06-20
Anticipated expiration: 2031-03-11

Abstract

The utility model discloses a well pump device, comprising a pump (1) with a motor (2), the bodies of which are suitable for being placed in a well by means of a pipe (3); a frequency converter (4) electrically connected to the motor (2) by a cable (5), the frequency converter (4) comprising a rectifier (6) and an inverter (7), it further comprising an annular pump stator temperature detector (13), a main controller (14) and a display (15); the input end of the main controller (14) is connected with the pump stator temperature detector (13), and the output end of the main controller is connected with the display (15). The temperature of the pump stator can be obtained so as to make corresponding operation, and the service life of the whole equipment is prolonged.

Description

Well pump device

Technical Field

The present utility model relates to a well pump apparatus.

Background

The current well pump device cannot monitor the running state of the pump, even cannot monitor the temperature of the pump stator, so that whether the pump works in overload or not cannot be obtained, and whether the pump works in overload or not cannot be judged.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a well pump device which can acquire the temperature of a pump stator so as to perform corresponding operation and prolong the service life of the whole equipment.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: a well pump apparatus comprising a pump with an electric motor, the bodies of which are adapted to be plumbed into a well; a frequency converter electrically connected to the motor by a cable, the frequency converter comprising a rectifier and an inverter, the inverter being adapted to be placed in the well, the input of the inverter being connected by a single-conductor cable to a first output terminal of the rectifier, and another single-conductor wire responsible for powering the motor and the inverter electrically connecting the motor and the inverter body to a tube, the tube being electrically connected to a second output terminal of the rectifier; the device also comprises an annular pump stator temperature detector, a main controller and a display; the input end of the main controller is connected with the pump stator temperature detector, and the output end of the main controller is connected with the display.

Further, the pump stator temperature detector comprises an annular retainer and a plurality of pump stator temperature detection probes arranged on the retainer; the cage serves to be mounted outside the stator of the pump.

Further, a plurality of the pump stator temperature detection probes are distributed on the retainer at equal intervals.

Furthermore, the retainer is formed by splicing two semi-rings.

Further, the device also comprises DCS clamping pieces, the number of which is consistent with that of the temperature detection probes of the stator of the pump; each DCS clamping piece is connected between each pump stator temperature detection probe and the main controller.

Further, the DCS clip is a thermal resistor clip.

Further, the pump stator temperature detection probe is a thermal resistance probe.

Further, the intelligent alarm system also comprises an alarm, and the alarm is connected with the main controller.

By adopting the structural design, compared with the prior art, the device has the following advantages:

the device mainly improves the temperature sensor, and specifically comprises an annular pump stator temperature sensor, a main controller and a display; the input end of the main controller is connected with the pump stator temperature detector, and the output end of the main controller is connected with the display. The temperature of the pump stator is acquired and fed back to the display through the main controller, and the on-site operator sees corresponding temperature information through the display so as to perform corresponding operation.

Drawings

Fig. 1 is a structural diagram of the present utility model.

FIG. 2 is a schematic diagram of a pump stator temperature probe.

Fig. 3 is a control schematic of the present utility model.

Detailed Description

The utility model will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.

The utility model discloses a well pump device, comprising a pump 1 with a motor 2, the bodies of which are suitable for being put into a well by a pipe 3; the frequency converter 4, which is electrically connected to the motor 2 by a cable 5, comprises a rectifier 6 and an inverter 7. According to the utility model, the reverser 7 is adapted to be placed in the well and connected by a single-conductor cable 5 to the first output terminal of the rectifier 6, while another single-conductor wire responsible for supplying the motor 2 and the reverser 7 electrically connects the body of the motor 2 and the reverser 7 with the tube 3, the tube 3 being electrically connected to the second output terminal of the rectifier 6.

In addition, fig. 1 also shows schematically a riser string 8 and a solar surface 9, as well as some control units commonly used in the present system to perform specific functions, which are well known in the art and do not form the subject of the present utility model, such as rectifier control unit 10, transformer 11, and control station 12.

The well pump apparatus according to the present utility model operates according to the following principle.

The three-phase supply voltage with a frequency of 50Hz output by the control station 12 is converted by the transformer 11 into a nominal voltage required for the operation of the motor 2, for example 750-2300V, depending on the power of the motor 2. The nominal voltage is supplied to the input of the frequency converter 4, and the frequency converter 4 converts the voltage with the frequency of 50Hz into a voltage with the same amplitude and the frequency adjustable within 0-100V. The dc voltage output from the rectifier 6 is supplied to the input of the inverter 7 via the single-core cable 5. The inverter 7 converts the amplitude-controlled direct voltage into a frequency-controlled alternating voltage and supplies it to the input of the motor 2, thus starting the motor 2 to operate at the voltage frequency required by the specific operating conditions of the pump.

Since the inverter 7 is removed from the frequency converter 4 arranged on the sun's surface and placed in close proximity to the motor 2, the inverter 7 can be supplied by one single-core cable, while the tube 3 is another single-core power supply line. The above-described arrangement of the reverser 7 eliminates the risk of damage caused by disturbing the insulation between conductors in the multicore cable; the metal consumption of each structure is reduced; the electric loss is less, and the number of copper wires is reduced from three to one, so that the operation efficiency of the equipment is improved; and the reliability is improved due to the reduced number of wires, and in practice the wires often become problematic due to the long distance the cable 5 moves.

In order to obtain the temperature of the pump stator so as to make corresponding operation, the service life of the whole equipment is prolonged.

The following improvements have been further proposed.

It also includes a ring-shaped pump stator temperature detector 13, a main controller 14 and a display 15; the input end of the main controller 14 is connected with the pump stator temperature detector 13, and the output end of the main controller is connected with the display 15.

In a specific implementation, as a further scheme, the pump stator temperature detector 13 includes an annular retainer 1311 and a plurality of pump stator temperature detection probes 1312 mounted on the retainer 1311; the retainer 1311 serves to be mounted outside the stator of the pump 1. The problem with the mounting of the retainer 1311 is prior art and is not described in detail herein.

In a specific implementation, as a further scheme, a plurality of pump stator temperature probe units 1312 are distributed on the retainer 1311 at equal intervals.

In a specific implementation, as a further scheme, the retainer 1311 is formed by splicing two half rings.

In the specific implementation, as a further scheme, the device further comprises DCS clamping pieces 16, the number of which is consistent with that of the temperature detection probes 1312 of the stator of the pump; each DCS clip 16 is connected between each pump stator temperature probe 1312 and the main controller 14. The function, installation and connection of the DCS fastener 16 are all of the prior art and are not specifically described herein.

In a specific implementation, as a further scheme, the DCS clip 16 is a thermal resistor clip.

In a specific implementation, as a further scheme, the pump stator temperature probe 1312 is a thermal resistance probe.

In the embodiment, as a further scheme, the system further comprises an alarm 17, wherein the alarm 17 is connected with the main controller 14.

The device can adopt solar energy to provide energy sources, and can also adopt wind energy to provide energy sources.

The foregoing is illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the claims. The utility model is not limited to the above embodiments, but various changes within the protective scope of the independent claims are possible within the protective scope of the utility model.

Claims

1. A well pump apparatus comprising a pump (1) with an electric motor (2), the bodies of which are adapted to be placed in a well by means of a pipe (3); a frequency converter (4) electrically connected to the motor (2) by a cable (5), the frequency converter (4) comprising a rectifier (6) and a reverser (7), the reverser (7) being adapted to be placed in the well, the input of the reverser (7) being connected by a single-conductor cable (5) to a first output terminal of the rectifier (6), and another single-conductor wire responsible for powering the motor (2) and the reverser (7) electrically connecting the motor (2) and the reverser (7) body with the tube (3), the tube (3) being electrically connected to a second output terminal of the rectifier (6); the method is characterized in that: the device also comprises an annular pump stator temperature detector (13), a main controller (14) and a display (15); the input end of the main controller (14) is connected with the pump stator temperature detector (13), and the output end of the main controller is connected with the display (15).

2. A well pump apparatus as defined in claim 1, wherein: the pump stator temperature detector (13) comprises an annular retainer (1311) and a plurality of pump stator temperature detection probes (1312) mounted on the retainer (1311); the cage (1311) serves to be mounted outside the stator of the pump (1).

3. A well pump apparatus as claimed in claim 2, wherein: a plurality of pump stator temperature detection probes (1312) are distributed on the retainer (1311) at equal intervals.

4. A well pump apparatus as claimed in claim 2, wherein: the retainer (1311) is formed by splicing two semi-rings.

5. A well pump apparatus as claimed in claim 2, wherein: the device also comprises DCS clamping pieces (16) the number of which is consistent with that of the temperature detection probes (1312) of the stator of the pump; each DCS card (16) is connected between each pump stator temperature probe (1312) and the main controller (14).

6. A well pump apparatus as defined in claim 5, wherein: the DCS clamping piece (16) is a thermal resistance clamping piece.

7. A well pump apparatus as claimed in claim 2, wherein: the pump stator temperature probe (1312) is a thermal resistance probe.

8. A well pump apparatus as defined in claim 1, wherein: the intelligent control system also comprises an alarm (17), wherein the alarm (17) is connected with the main controller (14).