CN214366767U

CN214366767U - Submerged pump with water inlet detection function

Info

Publication number: CN214366767U
Application number: CN202120176856.XU
Authority: CN
Inventors: 方柏宜
Original assignee: HCP PUMP MANUFACTURER CO LTD
Current assignee: HCP PUMP MANUFACTURER CO LTD
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-10-08
Anticipated expiration: 2031-01-22

Abstract

The utility model relates to a submerged pump with examine function is examined to intaking, it mainly is installed drive unit and the detector of intaking in the casing, the motor of drive unit is located the motor room of casing, the motor is located the water supply channel of casing via the impeller of mandrel connection, the detector of should intaking has the electrode bar of two interval arrangements, two electrode bars set firmly in the casing by insulating positioning seat ground, and two electrode bars are respectively via the outside control system of cable conductor electric connection, form independent intake and examine the detection return circuit, ensure that the detector of should intaking can exert accurate real inspection function in the use, when avoiding the power supply of submerged pump to pass through the converter effectively, because of intaking examine the return circuit that the detector and casing earth connection formed and receive the interference of examining the circuit, and cause the electric leakage circuit breaker misjudgement in the converter and interrupt the situation of electric power.

Description

Submerged pump with water inlet detection function

Technical Field

The present invention relates to a submerged pump, and more particularly to a submerged pump with a water inlet detection function.

Background

At present, the sewage treatment tank is provided with a submerged pump based on the requirement of carrying sewage to execute treatment operation for a long time in environments such as the sewage treatment tank of a sewage plant, and the submerged pump is monitored by a control system for a long time. Generally, the existing submerged pump mainly has a motor-driven blade installed in a casing, and utilizes the high-speed rotation of an impeller to generate a pressurizing effect on sewage in a water feeding channel at the bottom of the casing, so that the sewage is conveyed along a predetermined pipeline.

In the existing submerged pump, because the motor must be sealed in the casing, it is ensured that the motor will not be submerged, and because the submerged pump may be subjected to casing water inflow due to the wear of machine parts after long-term use, for example, water inflow caused by the damage of the shaft seal between the bearing seat and the spindle in the casing, therefore, in order to generate early warning and power off to the motor before the motor is submerged, the existing submerged pump is provided with a water inflow detector in the composition structure for monitoring water inflow in cooperation with a control system.

In the known submersible pump, the water inlet detector adopts a single metal conductive rod as an electrode, the metal conductive rod is arranged in the casing and forms a detection loop of an electric connection control system with a grounding wire in a cable of the submersible pump, however, when a power source of the submersible pump passes through the frequency converter, the detection loop formed by the water inlet detector and the casing grounding wire is easily subjected to electromagnetic interference, so that the electric leakage breaker in the frequency converter generates misjudgment to interrupt the power, the operator is difficult to judge the correctness of the water inlet detection alarm, and the inconvenience is caused to the operator, and the need for further improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the problem that a single metal conductive rod type water inlet detector in the existing submerged pump is prone to misreporting water inlet information is solved.

The utility model provides a technical solution is: the utility model provides a submerged pump with examine function of intaking, it can be controlled by an outside control system, this submerged pump includes: the water-feeding detector comprises a machine shell, a driving unit and a water feeding detector, wherein the bottom of the machine shell is provided with a water feeding channel, an upper bearing seat with a bearing and a lower bearing seat with a bearing are arranged above the water feeding channel at intervals up and down, a water chamber is arranged between the lower bearing seat and the water feeding channel, an oil chamber capable of filling electric insulating lubricating oil and a motor chamber positioned above the upper bearing seat are arranged between the lower bearing seat and the upper bearing seat above the lower bearing seat; the driving machine set is arranged in the shell and comprises an impeller, a motor and a spindle connected between the impeller and the motor, the impeller is arranged in a water feeding channel of the shell, the motor is arranged in a motor chamber of the shell and is electrically connected with the control system, the spindle penetrates through a bearing of the upper bearing seat from the motor chamber downwards and passes through the oil chamber, a bearing penetrating through the lower bearing seat and the water chamber, and the motor can be controlled to drive the impeller to rotate; the water inlet detector is arranged in the shell; wherein:

the water inlet detector comprises two electrode bars, an insulating positioning seat and two cables, wherein the two electrode bars are fixedly arranged in the insulating positioning seat at intervals, each cable is electrically connected with one electrode bar, the water inlet detector is fixedly connected to the upper bearing seat of the shell in a sealing mode through the insulating positioning seat, the two electrode bars are insulated from the shell and extend downwards to an oil chamber, the two cables can be connected with an external control system, and when water enters the bottom end of the two electrode bars in the oil chamber, the two electrode bars are conducted through the water entering the oil chamber, and a water inlet signal is sent to the control system.

In the submersible pump with the water inlet detection function, the casing includes a base, a housing and an outer sleeve, the base has the water supply channel therein, the water supply channel forms a water inlet at the bottom of the base, one side of the base forms a water outlet, the housing is mounted on the base, the top of the housing has a top cover, the upper bearing seat and the lower bearing seat are arranged in the housing at intervals up and down, the upper and lower areas of the inner part of the housing are divided into the motor chamber, the oil chamber and the water chamber, the outer sleeve is sleeved outside the housing, a space communicated with the water chamber is provided between the outer sleeve and the housing, and a cooling water circulation system can be externally connected; the impeller of the driving unit is arranged in the water feeding channel of the base, is adjacent to the water inlet and extends to the bottom of the shell, and the impeller separates the water feeding channel of the base from the water chamber of the shell.

In the submersible pump with the water inlet detection function, the upper bearing seat comprises a seat body and an extension wall which protrudes outwards from the outer periphery of the seat body, the bearing is arranged on the seat body, a gap is formed between the bottom of the seat body and the top surface of the lower bearing seat, and the insulating positioning seat of the water inlet detector is fixedly arranged in the extension wall.

In the submersible pump with the water inlet detection function, the height positions of the bottom ends of the two electrode rods are as high as the bottom of the upper bearing seat. Or the height positions of the bottom ends of the two electrode rods are positioned between the bottom of the upper bearing seat and the top surface of the lower bearing seat.

In the submersible pump with the water inlet detection function, the upper ends of the two electrode bars are respectively provided with a fixing end part forming an external thread, the insulation positioning seat is provided with two fixedly connecting holes arranged at intervals and a glue filling groove which is positioned above and communicated with the two fixedly connecting holes, the two fixedly connecting holes are respectively provided with an internal thread, the fixed end parts of the two electrode bars are respectively screwed in the two fixedly connecting holes of the insulation positioning seat, the two cables respectively pass through the glue filling groove and are electrically connected with the corresponding fixing end parts of the electrode bars, and the glue filling groove is filled with insulation glue so that the two electrode bars, the two cables and the insulation positioning seat are in a sealed and fixedly connected state.

In the submersible pump with the water inlet detection function, the insulating positioning seat is provided with a base part and a fixing part connected to the top of the base part, the outer peripheral surface of the fixing part is provided with external threads, and the fixing part is sleeved with a sealing ring and locked in the upper bearing seat.

The utility model discloses the beneficial efficiency that can reach is as follows at least:

1. the detection is accurate and reliable: the utility model discloses the submerged pump is that it installs the casing inside to intake the detector, this detector of intaking adopts the electrode bar of two interval arrangements, these two electrode bars set firmly in the casing by insulating positioning seat ground, and these two electrode bars are respectively via the outside control system of cable conductor electric connection, it examines the return circuit to form independent intaking, ensure that this detector of intaking can exert accurate real inspection function in the use, when avoiding the power supply of submerged pump to pass through the converter effectively, examine and examine the detection return circuit that forms with the casing earth connection because of intaking and easily receive electromagnetic interference, cause the electric leakage circuit breaker in the converter to produce the thing of erroneous judgement and interrupt electric power.

2. The built-in water inlet detector effectively avoids collision damage: bearing said, the utility model discloses submerged pump sets up the inspection ware of intaking inside the casing, and the cable conductor of the inspection ware of intaking and the cable conductor connection external control system of motor ensure that the inspection ware of intaking does not expose, and can effectively avoid foreign object collision and take place to damage the condition.

3. Ensure the safety in utilization of submerged pump and reduce cost of maintenance: when the submersible pump is used, when the shaft seal between the lower bearing seat and the mandrel in the shell is damaged and water enters the oil chamber close to the bottom of the motor chamber in the shell, the water inlet signal is sent to the control system along with the rising of the water inlet level in the oil chamber until the two electrode rods of the water inlet detector contact with the water to be conducted, the control system executes the power failure of the motor or sends the water inlet warning message according to the water inlet signal of the water inlet detector, and then before the motor is not immersed and leaks electricity, the damaged shaft seal and other parts are repaired in advance, so that the motor is prevented from being damaged by immersion, the safety of the submersible pump is maintained, and the maintenance cost is reduced.

The utility model discloses a submerged pump still can further utilize this inspection ware of intaking's insulating positioning seat to have a basal portion and connect in a fixed part at this basal portion top, and this fixed part outer peripheral face has the external screw thread, and this fixed part cover is established a sealing washer and is locked the integrated configuration in this bolster bearing housing, ensures that the gap entering to the motor room between bolster bearing housing and the insulating positioning seat can not be passed through to the intaking in the entering oil chamber.

The utility model discloses a submerged pump still can further utilize the stiff end lock of two electrode bar upper ends of this inspection ware of intaking in two rigid coupling holes of this insulating positioning seat, these two cable conductors are respectively through the fixed tip that is located these two electrode bar of the glue-filling groove electric connection of these two rigid coupling hole tops, and fill in this glue-filling groove and seal the glue, ensure these two electrode bar, be sealed rigid coupling state between these two cable conductors and this insulating positioning seat, make these two electrode bar, the connection structure between these two cable conductors and this insulating positioning seat possesses excellent insulating nature and fixity ability.

Drawings

Fig. 1 is a schematic partial cross-sectional view of a submerged pump with water inlet detection function according to a preferred embodiment of the present invention.

Fig. 2 is a partially enlarged schematic view of fig. 1.

Fig. 3 is a schematic cross-sectional view of the water inlet detector of the submerged pump shown in fig. 1 and 2 according to the preferred embodiment.

FIG. 4 is a schematic top cross-sectional view of the cut line A-A shown in FIG. 3.

Fig. 5 is a schematic view of the submerged pump of fig. 1 and 2 in a state of water inflow.

The reference numerals are briefly described:

10 casing

11: base

110 water supply channel

111 water inlet

112, water outlet

12: shell

121: lower bearing seat

1211 top surface

122 upper bearing seat

1220 seat body

1221 extending walls

1222 bottom part

13 outer sleeve

131 space (c)

14: water chamber

140: water

15: oil chamber

150 lubricating oil

16 motor chamber

20 driving unit

21: motor

22: mandrel

23: impeller

30 water inlet detector

31 electrode bar

311 fixed end part

32: cable wire

33 insulating positioning seat

330 base part

331: fixed part

332, a fastening hole

333 glue filling groove

34 insulating sealant

35: sealing ring

Detailed Description

The technical means adopted by the present invention to achieve the objects of the present invention will be further described below with reference to the drawings and preferred embodiments of the present invention.

As shown in fig. 1 and 2, the submerged pump with water inlet detection function according to the present invention is disclosed, which can be controlled by an external control system, as can be seen from the drawings, and comprises a housing 10, a driving unit 20 and a water inlet detector 30.

As shown in fig. 1 and 2, the bottom of the housing 10 has a water feeding channel 110, and an upper bearing seat 122 having bearings and a lower bearing seat 121 having bearings are arranged above the water feeding channel at intervals, a water chamber 14 is formed between the lower bearing seat 121 and the water feeding channel 110, an oil chamber 15 filled with lubricating oil 150 is formed between the lower bearing seat 121 and the upper bearing seat 122 above the lower bearing seat 121, and a motor chamber 16 is formed above the upper bearing seat 122.

As shown in fig. 1 and 2, in the preferred embodiment, the housing 10 includes a base 11, a casing 12, and an outer sleeve 13, the base 11 has the water supply channel 110 therein, the water supply channel 110 forms a water inlet 111 at the bottom of the base 11, and forms a water outlet 112 at one side of the base 11. The housing 12 is installed on the base 11 and has a top cover at the top, the upper bearing seat 122 and the lower bearing seat 121 are arranged in the housing 12 at intervals up and down, and the interior of the housing 12 is divided into the motor chamber 16, the oil chamber 15 and the water chamber 14 up and down, that is, the motor chamber 16 is located above the upper bearing seat 122, the oil chamber 15 is located between the upper bearing seat 122 and the lower bearing seat 121, the oil chamber 15 contains a proper amount of lubricating oil 150 with electrical insulation, and the water chamber 14 is located between the lower bearing seat 121 and the base 11. The outer sleeve 13 is sleeved outside the casing 12, and a space 131 communicated with the water chamber 14 is formed between the inner wall of the outer sleeve 13 and the outer peripheral wall of the casing 12 for externally connecting a cooling water circulation system, so that cooling water output by the cooling water circulation system can flow through the space 131 and the water chamber 14 and then flow back to the cooling water circulation system, thereby providing a cooling function for the casing 10.

As shown in fig. 1 and 2, in the above description, the base 11, the housing 12, the outer sleeve 13, and the like of the casing 10 are made of metal materials with excellent rigidity, and are grounded through the casing 10, so as to ensure the safety of the submersible pump. In the housing 12, the upper bearing seat 122 includes a seat 330 and an extending wall 1221 protruding outward from the outer periphery of the seat 330, the bearing is installed in the seat 330, and a space is formed between the bottom of the seat 330 and the top surface of the lower bearing seat 121.

As shown in fig. 1 and 2, the driving unit 20 is installed in the casing 10, the driving unit 20 includes an impeller 23, a motor 21 and a spindle 22, the impeller 23 is installed in the water feeding passage 110 of the base 11 adjacent to the water inlet 111 and extends to the bottom of the housing 12, the impeller 23 partitions the water feeding passage 110 of the base 11 from the water chamber of the housing 12, the motor 21 is disposed in the closed motor chamber 16 of the housing 12 and electrically connected to an external control system by a cable, the spindle 22 is connected to the motor 21, and the spindle 22 passes through the bearing of the upper bearing seat 122 from the motor chamber 16, the motor 21 can be controlled by a control system to drive the impeller 23 to rotate by connecting the oil chamber 15, the bearing penetrating the lower bearing seat 121 and the impeller 23 through the water chamber 14, a shaft seal is provided between the upper bearing housing 122 and the spindle 22, and a shaft seal is provided between the lower bearing housing 121 and the spindle 22.

As shown in fig. 2 to 4, the water inlet sensor 30 is installed in the upper bearing seat 122 of the housing 12 and extends downward into the oil chamber 15, the water inlet sensor 30 includes two electrode rods 31, an insulating positioning seat 33 and two electric cables 32, the two electrode rods 31 are rod-shaped members made of conductive materials, and the conductive materials can be conductive metal materials, such as: copper, etc., and the insulating positioning seat 33 is made of an insulating material, which may be plastic or rubber, etc. The upper ends of the two electrode rods 31 are respectively provided with a fixed end 311, the two electrode rods 31 are arranged at intervals and are fixedly arranged in the insulating positioning seat 33 by the fixed end 311, each cable 32 is electrically connected with one fixed end 311 of the electrode rod 31, the water inlet detector 30 is fixedly connected in the extending wall 1221 of the upper bearing seat 122 of the shell 12 in a sealing way by the insulating positioning seat 33, the two electrode rods 31 are insulated from the shell 10, the two cables 32 are connected with an external control system, and when water enters the bottom ends of the two electrode rods 31 in the oil chamber 15, the two electrode rods 31 are conducted by water 140 entering the oil chamber 15, so as to send a water inlet signal to the control system, and the control system executes power-off of the motor 21 or sends a water inlet warning message according to the water inlet signal of the water inlet detector 30.

As shown in fig. 2, in the above description, the bottom ends of the two electrode rods 31 are located at the same height as the bottom of the upper bearing housing 122 or between the bottom of the upper bearing housing 122 and the top of the lower bearing housing 121.

As shown in fig. 2 to 4, in the foregoing, the fixing end 311 of the two electrode rods 31 has an external thread, the extending wall 1221 of the upper bearing seat 122 of the housing 12 is provided with a threaded hole, the insulating positioning seat 33 has a base 330 and a fixing portion 331 connected to the top of the base 330, the outer peripheral surface of the fixing portion 331 has an external thread, and the fixing portion 331 is sleeved with a sealing ring 35 and locked in the extending wall 1221 of the upper bearing seat 122, so that the sealing ring has a leakage-proof function. The insulating positioning seat 33 has two fixing holes 332 arranged at intervals and a glue filling groove 333 located above the fixing holes 332 and communicated with each other, the two fixing holes 332 respectively have internal threads, the fixing end portions 311 of the two electrode bars 31 are respectively screwed into the two fixing holes 332 of the insulating positioning seat 33, the two cables 32 are respectively electrically connected with the fixing end portions 311 of the corresponding electrode bars 31 through the glue filling groove 333, and an insulating glue 34 is filled in the glue filling groove 333, so that the two electrode bars 31, the two cables 32 and the insulating positioning seat 33 are in a sealed and fixed state.

In the above-mentioned submersible pump, the casing 10 can further include a motor temperature detector installed in the motor chamber 16, the motor temperature detector is electrically connected to the control system for detecting the motor temperature, and the control system determines the motor temperature according to the temperature detected by the motor temperature detector, and stops the motor from operating when the motor temperature is detected to be higher than the predetermined safe temperature, so as to prevent the motor from being burnt due to the over-high temperature. In the above-mentioned submersible pump, a bearing temperature detector may be further installed in the upper bearing housing 122, the bearing temperature detector is electrically connected to the control system for detecting the bearing temperature of the upper bearing housing 122, and the control system determines the temperature according to the temperature detected by the bearing temperature heat detector, and when the bearing temperature is detected to be higher than the predetermined safe temperature, the motor 21 is stopped to ensure that the bearing is not damaged due to the over-high temperature. The motor temperature detector and the bearing temperature detector may be any available products, and their specific structure is not described herein.

As shown in fig. 1 and 5, the submersible pump can be applied to a sewage pool of a sewage treatment plant or other environments where long-term standing water pumping is required, and the submersible pump can be controlled by an external control system, so that the motor 21 drives the impeller 23 in the water delivery channel 110 at the bottom of the housing 10 to rotate, and the sewage and the like are delivered towards a target direction. In the using process, when the shaft seal between the lower bearing seat 121 and the spindle 22 in the housing 10 is damaged, and the oil chamber 15 near the bottom of the motor chamber 16 in the housing 10 is filled with water, the two electrode rods 31 of the water inlet detector 30 contact with water along with the rising of the water level of the water inlet in the oil chamber 15, the two electrode rods 31 are conducted through the water 140 entering the oil chamber 15, so as to send a water inlet signal to the control system, and the control system executes the power failure of the motor 21 or sends a water inlet warning message according to the water inlet signal of the water inlet detector 30, so that before the motor 21 is not immersed in water and leaks electricity, the damaged shaft seal and other parts are repaired in advance, the damage of the motor 21 due to the immersion is avoided, the safety of the submerged pump is maintained, and the maintenance cost is reduced.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make modifications or changes to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims

1. A submerged pump with water inlet detection function can be controlled by an external control system, and comprises: the water-feeding detector comprises a machine shell, a driving unit and a water feeding detector, wherein the bottom of the machine shell is provided with a water feeding channel, an upper bearing seat with a bearing and a lower bearing seat with a bearing are arranged above the water feeding channel at intervals up and down, a water chamber is arranged between the lower bearing seat and the water feeding channel, an oil chamber capable of filling electric insulating lubricating oil and a motor chamber positioned above the upper bearing seat are arranged between the lower bearing seat and the upper bearing seat above the lower bearing seat; the driving machine set is arranged in the shell and comprises an impeller, a motor and a spindle connected between the impeller and the motor, the impeller is arranged in a water feeding channel of the shell, the motor is arranged in a motor chamber of the shell and is electrically connected with the control system, the spindle penetrates through a bearing of the upper bearing seat from the motor chamber downwards and passes through the oil chamber, a bearing penetrating through the lower bearing seat and the water chamber, and the motor can be controlled to drive the impeller to rotate; the water inlet detector is arranged in the shell; the method is characterized in that:

2. The submersible pump with water inlet detection function according to claim 1, wherein the housing comprises a base, a housing, and an outer sleeve, the base has the water supply channel therein, the water supply channel forms a water inlet at the bottom of the base, one side of the base forms a water outlet, the housing is mounted on the base and has a top cover at the top thereof, the upper bearing seat and the lower bearing seat are arranged in the housing in an up-down spaced manner to divide the upper and lower parts of the interior of the housing into the motor chamber, the oil chamber and the water chamber, the outer sleeve is sleeved on the outer side of the housing, a space communicating with the water chamber is provided between the outer sleeve and the housing, and a cooling water circulation system can be externally connected;

the impeller of the driving unit is arranged in the water feeding channel of the base, is adjacent to the water inlet and extends to the bottom of the shell, and the impeller separates the water feeding channel of the base from the water chamber of the shell.

3. The submersible pump with water inlet detection function as claimed in claim 2, wherein the upper bearing seat comprises a seat body and an extension wall protruding outwards from the outer periphery of the seat body, the seat body is provided with the bearing, a gap is provided between the bottom of the seat body and the top surface of the lower bearing seat, and the insulating positioning seat of the water inlet detector is fixed in the extension wall.

4. The submersible pump with water inlet detection function according to any one of claims 1 to 3, wherein the bottom ends of the two electrode rods are at the same height as the bottom of the upper bearing seat.

5. The submersible pump with water inlet detection function according to any one of claims 1 to 3, wherein the bottom ends of the two electrode rods are located at a height position between the bottom of the upper bearing seat and the top surface of the lower bearing seat.

6. The submersible pump with water inlet detection function according to any one of claims 1 to 3, wherein the two electrode rods each have a fixing end portion forming an external thread at an upper end thereof, the insulation positioning seat has two fixing holes spaced apart from each other and a glue filling groove located above and communicating with the two fixing holes, the two fixing holes each have an internal thread, the fixing ends of the two electrode rods are respectively screwed into the two fixing holes of the insulation positioning seat, the two cables are respectively passed through the glue filling groove and electrically connected to the corresponding fixing end portions of the electrode rods, and an insulation glue is filled in the glue filling groove to form a sealed and fixed connection state between the two electrode rods, the two cables and the insulation positioning seat.

7. The submersible pump with water inlet detection function as claimed in claim 6, wherein the insulating positioning seat has a base portion and a fixing portion connected to the top of the base portion, the fixing portion has external threads on its outer periphery, and the fixing portion is sleeved with a sealing ring and locked in the upper bearing seat.