CN212028002U

CN212028002U - Canned magnetic pump with leakage detection function

Info

Publication number: CN212028002U
Application number: CN202020532727.5U
Authority: CN
Inventors: 黄丁财
Original assignee: Zi Yi Electrical Engineering Co Ltd
Current assignee: Zi Yi Electrical Engineering Co Ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-11-27
Anticipated expiration: 2030-04-13

Abstract

A canned magnetic pump with leakage detection function comprises a base unit, a motor unit, and a leakage detection sensor, the base unit comprises a positioning seat, the motor unit comprises a rotor, an inner shell sleeved with the rotor, an outer shell sleeved with the inner shell, and a stator surrounding between the positioning seat and the outer shell, the inner shell is provided with an inner surrounding wall surrounding the rotor, and an inner side wall connected to one side of the inner surrounding wall along the extension direction of the axis, the inner surrounding wall and the inner side wall jointly define an accommodating space for the rotor to be arranged, the outer shell is provided with an outer surrounding wall surrounding the stator and the inner surrounding wall and an outer side wall connected with the outer surrounding wall, the leakage detection sensor is arranged on the outer shell and comprises a sensing module for sensing the change of the electrostatic capacity between the middle part of the outer side wall and the inner side wall and the static capacity between the middle part and the outer side wall, so that chemical liquid can be sensed in real time when leaking.

Description

Canned magnetic pump with leakage detection function

Technical Field

The utility model relates to a canned magnetic drive pump especially relates to a canned magnetic drive pump of utensil function of leaking hunting.

Background

A conventional magnetic drive pump, as shown in taiwan certificate No. TWI424661, includes a front cover, a supporting frame, an impeller, a rear cover, an inner rotor, an outer rotor, a fixed shaft, and a bracket, wherein the rear cover is cup-shaped and has a two-layer shell structure, and has a rear cover liner made of fluoroplastic, and a reinforcing layer.

Although the magnetic drive pump uses the rear cover lining and the strengthening layer to form a two-layer shell structure, because the outline range of the end edge of the strengthening layer is smaller than the outline range of the rear cover lining, when the rear cover lining is cracked, leaked chemical liquid can flow along the gap between the rear cover lining and the strengthening layer, and can leak to the outer rotor from the abutting part of the end edge of the strengthening layer and the rear cover lining, and the leaked chemical liquid can corrode the outer rotor, thereby causing damage to the motor.

Disclosure of Invention

An object of the utility model is to provide an overcome the background art the canned magnetic pump of utensil function of leaking hunting of shortcoming.

The utility model discloses a canned magnetic pump with leak hunting function, which comprises a base unit and a motor unit, wherein the base unit comprises a positioning seat arranged around an axis, the motor unit comprises a rotor capable of rotating around the axis, an inner shell sleeved outside the rotor, an outer shell sleeved outside the inner shell, and a stator surrounding between the positioning seat and the outer shell and corresponding to the rotor, the canned magnetic pump with leak hunting function further comprises a leak hunting sensor, the inner shell is provided with an inner surrounding wall surrounding the rotor, an inner side wall connected to one side of the inner surrounding wall along the extending direction of the axis, and a flange wall connected to one side of the inner surrounding wall opposite to the inner side wall and extending towards the direction far away from the axis, the inner surrounding wall and the inner side wall jointly define an accommodating space which is opened along the axis towards the direction far away from the inner side wall for the rotor to set, the outer shell is provided with a peripheral surrounding wall surrounding the stator and the inner surrounding wall, an outer side wall connected with the peripheral surrounding wall and located on one side of the inner side wall opposite to the accommodating space, and an extending wall connected with one side of the peripheral surrounding wall opposite to the outer side wall, extending towards the direction far away from the axis and located between the stator and the flange wall, wherein the leakage detection sensor is arranged on the outer shell and comprises a sensing module used for sensing the change of the electrostatic capacity between the middle of the outer side wall and the inner side wall and the static capacity between the middle of the outer side wall and the inner side wall and the leakage detection sensor.

Utensil function of leaking hunting canned magnetic drive pump, this shell body still have from the direction extension of this lateral wall this inside wall on the contrary and around the installation pipe wall that defines the installation space that supplies this sensor setting of leaking hunting.

Utensil function of leaking hunting canned magnetic drive pump, this installation pipe wall have adjacent this installation space's interior screw thread portion, should leak hunting the sensor and still locate this sensing module and wear to locate this installation space's sensor casing including the cover, this sensor casing has the outer screw thread portion that is used for spiro union in this interior screw thread portion.

Utensil leak hunting function's canned magnetic drive pump, this shell body still has the perforation that is located this lateral wall and communicates this installation space.

Utensil function of leaking hunting canned magnetic drive pump still contains the sealed unit of sensor, this sealed unit of sensor encircles the first sealing ring between this fenestrate position including setting up in one side that this sensor casing penetrated this installation space and this lateral wall.

Utensil leak hunting function's canned magnetic drive pump, this sensor ware sealing unit still locates this sensor ware casing including the cover in order to support in the second sealing ring of this installation pipe wall.

Utensil leak hunting function's canned magnetic drive pump, this sensor casing still have connect in this outer thread tooth opposite one side of this lateral wall for the installation anchor ring that this second sealing ring cover was established.

Utensil leak hunting function's canned magnetic drive pump, this motor unit still include motor leak protection spare, and this interior casing still has the annular groove of locating the one side of this flange wall adjacent to this inside wall relatively around this axis ground concave, and this motor leak protection spare is installed in this annular groove, makes this flange wall and this extend and keeps airtight between the wall.

Utensil leak hunting function's canned magnetic drive pump, this base unit still include the base, and set up in this base and the cover ring seat of locating this positioning seat.

The utility model discloses a profitable effect lies in: through setting up this sensor that leaks hunting, make the static capacity change between the middle department of this lateral wall and this inside wall and self can be sensed, consequently can be sensed immediately when the chemical liquid leakage, avoid follow-up production to damage.

Drawings

Fig. 1 is a perspective view of a canned magnetic pump with leak detection function according to a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the first embodiment;

FIG. 3 is a partial enlarged view of FIG. 2

FIG. 4 is a perspective view of a second embodiment of the canned magnetic pump with leak detection of the present invention;

FIG. 5 is a schematic cross-sectional view of the second embodiment;

fig. 6 is a partially enlarged view of fig. 5.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1, 2 and 3, the first embodiment of the canned magnetic pump with leak detection function of the present invention comprises a base unit 2, a motor unit 3 and a leak detection sensor 4.

The base unit 2 includes a base 21, a positioning seat 22 surrounding an axis L, and a ring seat 23 disposed on the base 21 and sleeved on the positioning seat 22.

The motor unit 3 includes a rotor 31 capable of rotating around the axis L, an inner housing 32 sleeved outside the rotor 31, an outer housing 33 sleeved outside the inner housing 32, a stator 34 surrounding between the positioning seat 22 and the outer housing 33 and corresponding to the rotor 31, and a motor leakage prevention member 35.

The inner housing 32 has an inner surrounding wall 321 surrounding the rotor 31, an inner sidewall 322 connected to one side of the inner surrounding wall 321 along the extending direction of the axis L, a flange wall 323 connected to the side of the inner surrounding wall 321 opposite to the inner sidewall 322 and extending away from the axis L, and an annular groove 324 recessed around the axis L on the side of the flange wall 323 opposite to the inner sidewall 322. The inner surrounding wall 321 and the inner sidewall 322 together define an accommodating space 325 that is open along the axis L in a direction away from the inner sidewall 322 for the rotor 31 to be disposed.

The outer casing 33 has an outer surrounding wall 331 surrounding the stator 34 and the inner surrounding wall 321, an outer side wall 332 connecting the outer surrounding wall 331 and located on a side of the inner side wall 322 opposite to the accommodating space 325, an extending wall 333 connecting the outer surrounding wall 331 and extending in a direction away from the axis L and located between the stator 34 and the flange wall 323, and a mounting tube wall 334 extending from the outer side wall 332 in a direction opposite to the inner side wall 322 and surrounding a mounting space 335 defining the leakage detecting sensor 4. The mounting tube wall 334 has an internal threaded portion 336 adjacent the mounting space 335.

The leak detection sensor 4 is disposed on the outer casing 33, and includes a sensing module 41 for sensing a change in electrostatic capacity between the middle of the outer sidewall 332 and the inner sidewall 322 and itself, and a sensor housing 42 covering the sensing module 41 and passing through the installation space 335, wherein the sensor housing 42 has an outer thread portion 421 for being screwed to the inner thread portion 336. In the present embodiment, the sensing module 41 is a capacitive proximity switch, and can be short-circuited or open-circuited according to whether a certain degree of capacitance is sensed.

The motor leakage preventer 35 is installed in the annular groove 324 to maintain air-tightness between the flange wall 323 and the extension wall 333. In the present embodiment, the motor leakage prevention member 35 is an O-ring.

When the motor unit 3 is in operation, the sensing module 41 can continuously sense the change of the electrostatic capacity between the middle of the outer side wall 332 and the inner side wall 322 and the outer side wall 332, and once the inner housing 32 is damaged and chemical liquid medicine leaks between the outer side wall 332 and the inner side wall 322, the electrostatic capacity between the sensing module 41 and the chemical liquid medicine changes due to the occurrence of the chemical liquid medicine, a controller (not shown) electrically connected to the sensing module 41 can send an alarm or stop the operation of the motor unit 3, so that subsequent maintenance can be further performed, the damage of the motor unit 3 caused by the chemical liquid medicine further leaking to the stator 34 can be avoided, and further, a more serious safety problem can be avoided.

Referring to fig. 4, 5 and 6, the second embodiment of the present invention is similar to the first embodiment, and the difference lies in:

the outer housing 33 also has a through hole 337 in the outer sidewall 332 and communicating with the mounting space 335.

The canned magnetic pump with leakage detection function further comprises a sensor sealing unit 5, wherein the sensor sealing unit 5 comprises a first sealing ring 51 arranged between the side of the sensor housing 42 penetrating into the installation space 335 and the part of the outer side wall 332 surrounding the through hole 337, and a second sealing ring 52 sleeved on the sensor housing 42 to abut against the installation pipe wall 334. In the present embodiment, the first sealing ring 51 and the second sealing ring 52 are both O-rings.

The sensor housing 42 further has a mounting ring 422 connected to the outer thread 421 on a side opposite to the outer sidewall 332 for the second sealing ring 52 to be sleeved on.

When the inner housing 32 is damaged to allow the chemical solution to leak between the outer sidewall 332 and the inner sidewall 322 and to contact the leakage detecting sensor 4 through the through hole 337, the electrostatic capacity between the sensing module 41 and the chemical solution is changed, so as to issue an alarm through the controller or stop the operation of the motor unit 3.

The first sealing ring 51 can prevent the chemical liquid from further leaking out through the through hole 337, and the second sealing ring 52 serves as a second line of defense to seal the installation space 335, so that even if the chemical liquid partially seeps out of the first sealing ring 51, the chemical liquid is still blocked by the second sealing ring 52, and the damage caused by the outward seepage of the chemical liquid can be avoided.

Thus, the second embodiment can also achieve the same objects and advantages as the first embodiment described above.

In summary, by providing the leakage detecting sensor 4, the capacitance variation between the middle of the outer sidewall 332 and the inner sidewall 322 and the capacitance variation between themselves can be sensed, so that the leakage of the chemical solution can be sensed in real time, and the subsequent damage can be avoided, thereby achieving the objective of the present invention.

Claims

1. The utility model provides a canned magnetic drive pump of utensil function of leaking hunting, contains base unit, and motor unit, and this base unit includes the positioning seat that encircles the axis setting, and this motor unit is including can locating the shell body in this interior casing outside this rotor, the cover in this rotor outside around this axis pivoted rotor, cover, and surround in this positioning seat and this shell body between and correspond the stator of this rotor, its characterized in that: the canned magnetic pump with the leakage detection function also comprises a leakage detection sensor, the inner shell is provided with an inner surrounding wall surrounding the rotor, an inner side wall connected to one side of the inner surrounding wall along the extending direction of the axis, and a flange wall connected to one side of the inner surrounding wall opposite to the inner side wall and extending towards the direction far away from the axis, the inner surrounding wall and the inner side wall jointly define an accommodating space which is opened towards the direction far away from the inner side wall along the axis for the rotor to be arranged, the outer shell is provided with an outer surrounding wall surrounding the stator and the inner surrounding wall, an outer side wall connected with the outer surrounding wall and positioned at one side of the inner side wall opposite to the accommodating space, and an extending wall connected to one side of the outer surrounding wall opposite to the outer side wall and extending towards the direction far away from the axis and positioned between the stator and the flange wall, the leakage detection sensor is arranged on the outer shell, and comprises a sensing module for sensing the change of the electrostatic capacity between the middle part of the outer side wall and the inner side wall.

2. The canned magnetic pump with leak detection function according to claim 1, characterized in that: the outer shell is also provided with a mounting pipe wall which extends from the outer side wall to the direction opposite to the inner side wall and surrounds a mounting space for the leakage detection sensor to be arranged.

3. The canned magnetic pump with leak detection function according to claim 2, characterized in that: the mounting pipe wall is provided with an inner thread part adjacent to the mounting space, the leakage detection sensor further comprises a sensor shell which is sleeved on the sensing module and penetrates through the mounting space, and the sensor shell is provided with an outer thread part which is in threaded connection with the inner thread part.

4. The canned magnetic pump with leak detection function according to claim 3, characterized in that: the outer shell is also provided with a through hole which is positioned on the outer side wall and communicated with the mounting space.

5. The canned magnetic pump with leak detection function according to claim 4, characterized in that: the canned magnetic pump with the leakage detection function further comprises a sensor sealing unit, and the sensor sealing unit comprises a first sealing ring arranged between one side of the sensor shell penetrating into the installation space and the part of the outer side wall surrounding the through hole.

6. The canned magnetic pump with leak detection function according to claim 5, characterized in that: the sensor sealing unit also comprises a second sealing ring which is sleeved on the sensor shell and is abutted against the installation pipe wall.

7. The canned magnetic pump with leak detection function according to claim 6, characterized in that: the sensor shell is also provided with a mounting ring surface which is connected with one side of the outer thread part opposite to the outer side wall and is used for the second sealing ring to be sleeved.

8. The canned magnetic pump with leak detection function according to claim 1, characterized in that: the motor unit further includes a motor leakage preventer, the inner housing further has a ring groove recessed around the axis on a side of the flange wall opposite to the side adjacent to the inner side wall, the motor leakage preventer is installed in the ring groove to maintain air-tightness between the flange wall and the extension wall.

9. The canned magnetic pump with leak detection function according to claim 1, characterized in that: the base unit further comprises a base and a ring seat arranged on the base and sleeved on the positioning seat.